阅读说明：本技术 流体泵送装置和卧式压缩机 (Fluid pumping device and horizontal compressor ) 是由 孙庆丰 杨东辉 于 2018-07-12 设计创作，主要内容包括：本公开提供了一种流体泵送装置和卧式压缩机。流体泵送装置包括具有第一泵构件和第二泵构件的内啮合式齿轮泵形式的泵结构、容置泵结构的泵外壳结构、至少两路抽吸路径和/或至少两路排出路径。其中,在第一泵构件与第二泵构件之间限定出抽吸腔和压缩腔,至少两路抽吸路径构造成随着泵结构的转动,流体泵送装置外部的流体能够分别经由至少两路抽吸路径被抽吸到抽吸腔中,至少两路排出路径构造成随着泵结构的转动,压缩腔中的已压缩流体能够分别经由排出路径从流体泵送装置排出。卧式压缩机中配装有前述的流体泵送装置。本公开的流体泵送装置和卧式压缩机确保充分润滑,具有较好运行稳定性和可靠性,结构简单,成本较低。(The present disclosure provides a fluid pumping device and a horizontal compressor. The fluid pumping device comprises a pump structure in the form of an internal gear pump having a first pump member and a second pump member, a pump housing structure accommodating the pump structure, at least two suction paths and/or at least two discharge paths. Wherein a suction chamber and a compression chamber are defined between the first pump member and the second pump member, the at least two suction paths are configured such that, with rotation of the pump structure, fluid outside the fluid pumping device can be sucked into the suction chamber via the at least two suction paths, respectively, and the at least two discharge paths are configured such that, with rotation of the pump structure, compressed fluid in the compression chamber can be discharged from the fluid pumping device via the discharge paths, respectively. The horizontal compressor is equipped with the fluid pumping device. The fluid pumping device and the horizontal compressor ensure sufficient lubrication, and have the advantages of good operation stability and reliability, simple structure and low cost.)

1. A fluid pumping device comprising:

a pump structure (184), the pump structure (184) comprising a first pump member (1841) and a second pump member (1842) being matable with each other, wherein the first pump member (1841) is arranged inside the second pump member (1842);

a pump housing structure defining a sealed cavity in which the pump structure (184) is rotatably fittable such that a suction cavity and a compression cavity are defined between the first pump member (1841) and the second pump member (1842); and

at least two suction paths configured such that, with rotation of the pump structure, fluid outside the fluid pumping device can be sucked into the suction chambers via the at least two suction paths, respectively, and/or at least two discharge paths configured such that, with rotation of the pump structure, compressed fluid in the compression chambers can be discharged from the fluid pumping device via the at least two discharge paths, respectively.

2. The fluid pumping device of claim 1, wherein at least two suction lumens are definable between the first pump member (1841) and the second pump member (1842), the at least two suction paths being adapted to communicate with respective ones of the at least two suction lumens.

3. The fluid pumping device of claim 1, wherein at least two compression chambers are definable between the first pump member (1841) and the second pump member (1842), the at least two discharge paths being adapted to communicate with respective ones of the at least two compression chambers.

4. The fluid pumping device of claim 3,

the pump housing structure includes a pump housing (186), the pump housing (186) having a first side (1861) and a second side (1862) opposite to each other, a first recess (1863) being provided on the first side (1861) of the pump housing (186), the pump structure (184) being fitted in the first recess (1863).

5. The fluid pumping device of claim 4,

a second recess (1864) having a larger diameter than the first recess (1863) is also provided on the first side (1861) of the pump housing (186) such that a transition step is formed between the first recess (1863) and the second recess (1864), and

the pump housing structure further includes a sealing cover plate (182), the sealing cover plate (182) fitting in the second recess (1864) against the transition step and the pump structure (184) at the first side (1861) of the pump housing (186).

6. The fluid pumping device of claim 4, wherein the fluid pumping device has a first suction cavity (SC1) and a second suction cavity (SC2) formed between the first pump member (1841) and the second pump member (1842), and the fluid pumping device comprises a first suction path fluidly connectable to the first suction cavity (SC1) and a second suction path fluidly connectable to the second suction cavity (SC2), wherein,

the first suction path includes a first blind groove (G1) provided on a bottom wall of the first recess portion (1863) of the pump housing (186) and a first through hole (H1) extending through a portion of the bottom wall of the first blind groove (G1) to the second side face (1864);

the second suction path includes a second blind groove (G2) provided on a bottom wall of the first recess portion (1863) of the pump housing (186) and a second through hole (H2) extending through a portion of the bottom wall of the second blind groove (G2) to the second side face (1864); and is

The first blind groove (G1) and the second blind groove (G2) are sequentially arranged along a rotation direction of the pump structure (184) on a side of the bottom wall of the first recess (1863) corresponding to a suction chamber of the pump structure.

7. The fluid pumping device of claim 6 wherein the fluid pumping device has a first compression cavity (PC1) and a second compression cavity (PC2) formed between the first pump member (1841) and the second pump member (1842), and the fluid pumping device comprises a first discharge path fluidly connectable to the first compression cavity (PC1) and a second discharge path fluidly connectable to the second compression cavity (PC2), wherein,

the first discharge path includes a third blind groove (G3) provided on a bottom wall of the first recess portion (1863) of the pump housing (186) and a third through hole (H3) extending through a portion of the bottom wall of the third blind groove (G3) to the second side face (1864);

the second discharge path includes a fourth blind groove (G4) provided on a bottom wall of the first recess portion (1863) of the pump housing (186), and a radial groove (G5) radially extending from the fourth blind groove (G4) toward a center of the first recess portion (1863) and in fluid communication with the fourth blind groove (G4); and is

The third blind groove (G3) and the fourth blind groove (G4) are sequentially arranged in a rotation direction of the pump structure (184) on a side of the bottom wall of the first recess (1863) corresponding to a compression chamber of the pump structure.

8. The fluid pumping device of claim 7, wherein the first blind groove (G1), the second blind groove (G2), the third blind groove (G3), and the fourth blind groove (G4) are four segments of arcuate grooves extending on the same circumference on a bottom wall of the first recess (1863) of the pump housing (186).

9. The fluid pumping device of claim 8 wherein:

the first blind groove (G1), the second blind groove (G2), the third blind groove (G3) and the fourth blind groove (G4) are the same in length and are symmetrically arranged about the center of the first recess (1863); or

The lengths of the first blind groove (G1), the second blind groove (G2), the third blind groove (G3) and the fourth blind groove (G4) are different, and/or two adjacent blind grooves are spaced apart by the same or different intervals among the first blind groove (G1), the second blind groove (G2), the third blind groove (G3) and the fourth blind groove (G4).

10. The fluid pumping device of claim 6,

a suction-side groove (EG1) is formed on a bottom wall of the first recess portion (1863) of the pump housing (186) at a side corresponding to the first suction chamber (SC1) and the second suction chamber (SC2) of the pump structure (184); and is

A first partition assembly that partitions the suction-side groove (EG1) into the first blind groove (G1) and the second blind groove (G2) is provided in the suction-side groove (EG1), and the first partition assembly is configured to be capable of adjusting the relative extension lengths of the first blind groove (G1) and the second blind groove (G2) by changing the position of the first partition assembly in the suction-side groove (EG 1).

11. The fluid pumping device of claim 10 wherein the first partition assembly comprises:

two or more first snap tabs (P1) disposed in the suction side groove (EG 1); and

a first snap block (187), the first snap block (187) being configured to be fixedly connectable in a snap-fit manner with the first snap projection (P1) to divide the suction side groove (EG1) into the first blind groove (G1) and the second blind groove (G2).

12. The fluid pumping device of claim 7,

a discharge-side groove (EG2) is formed on a bottom wall of the first recess portion (1863) of the pump housing (186) at a side corresponding to the first compression chamber (PC1) and the second compression chamber (PC2) of the pump structure (184); and is

A second partition member that partitions the discharge-side groove (EG2) into the third blind groove (G3) and the fourth blind groove (G4) is provided in the discharge-side groove (EG2), and the second partition member is configured to be capable of adjusting the relative extension lengths of the third blind groove (G3) and the fourth groove (G4) by changing the position of the second partition member in the discharge-side groove (EG 2).

13. The fluid pumping device of claim 12 wherein the second partition assembly comprises:

two or more second snap tabs (P2) provided in the discharge-side groove (EG 2); and

a second snap block (188), the second snap block (188) being configured to be fixedly connectable in a snap-fit manner with the second snap projection (P2) to partition the discharge-side groove (EG2) into the third blind groove (G3) and the fourth blind groove (G4).

14. The fluid pumping device of any one of claims 6 to 13,

a first pipe connection part (1865) is protrudingly formed on the second side surface (1862) of the pump housing (186) at a position corresponding to the first through hole (H1), the first through hole (H1) further extending through the first pipe connection part (1865); and/or

A second tube connecting part (1866) is protrudingly formed on the second side face (1862) of the pump housing (186) at a position corresponding to the second through hole (H2), the second through hole (H2) further extending through the second tube connecting part (1866); and/or

A third tube connecting portion (1867) is protrudingly formed on the second side face (1862) of the pump housing (186) at a position corresponding to the third through hole (H3), the third through hole (H3) further extending through the third tube connecting portion (1867).

15. The fluid pumping device of any one of claims 1 to 13, wherein the pump structure (184) is embodied as a gerotor pump and includes an inner gear component as the first pump component (1841) and an outer gear component as the second pump component (1842).

16. A horizontal compressor (100), the horizontal compressor (100) comprising:

a housing (110), the housing (110) being partitioned into a Motor Region (MR) including a motor (120) and an oil reservoir region (SR) for storing lubricating oil;

a rotating shaft (130), the rotating shaft (130) being disposed within the housing (110) and being driven by the motor (120), and an oil supply passage penetrating the rotating shaft (130) being provided within the rotating shaft (130);

a compression mechanism (140), which compression mechanism (140) is arranged at a first end (131) of the rotating shaft (130) within the Motor Region (MR) and can be supplied with lubricating oil via the oil supply channel of the rotating shaft (130); and

the fluid pumping device (180) according to any one of claims 1 to 15.

17. The horizontal compressor (100) according to claim 16, wherein the fluid pumping device (180) is fitted at the second end (132) of the rotary shaft (130) in the oil reservoir region (SR) and is capable of sucking lubricating oil from the oil reservoir region (SR) and the Motor Region (MR) via a first suction path and a second suction path of the at least two suction paths, respectively, and pumping compressed lubricating oil into the oil reservoir region (SR) and the oil supply channel of the rotary shaft (130) via a first discharge path and a second discharge path of the at least two discharge paths, respectively.

18. The horizontal compressor (100) of claim 17,

the horizontal compressor (100) further includes a first fluid supply pipe (LP1) configured to guide the lubricating oil in the oil Storage Region (SR) to the first suction path and a second fluid supply pipe (LP2) configured to guide the lubricating oil accumulated in the Motor Region (MR) to the second suction path.

19. The horizontal compressor (100) according to claim 18, wherein the first pump member (1841) of the fluid pumping device (180) is fixedly sleeved on the second end (132) of the rotary shaft (130) such that a radial groove (G5) in a first recess (1863) of a pump housing (186) of the pump casing structure is aligned with the oil supply channel of the rotary shaft (130).

20. The horizontal compressor (100) according to claim 19, wherein the horizontal compressor (100) further comprises:

a partition (160) secured to the housing (110) within the housing (110) and separating the interior of the housing (110) into the Motor Region (MR) and the reservoir region (SR); and

a trailing bearing seat (150) on which the diaphragm is fitted, and the trailing bearing seat (150) is configured to support the second end (132) of the rotating shaft (130), and the pump housing (186) of the fluid pumping device is fixedly connected to the trailing bearing seat (150).

Technical Field

The present disclosure relates to a fluid pumping device and a horizontal compressor equipped with such a fluid pumping device.

Background

The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

The compressor generally includes a housing, a compression mechanism accommodated in the housing, a motor driving the compression mechanism, a rotary shaft driven by the motor, and the like. During the operation of the compressor, it is generally necessary to supply lubricating oil to relevant moving parts (e.g., a compression mechanism) of the compressor in order to stably operate the compressor. For a vertical compressor in which a rotary shaft is arranged in a vertical manner, an oil sump is generally provided at a bottom wall of a compressor housing, and an oil pumping mechanism is provided at a bottom end of the rotary shaft for pumping lubricating oil to the compression mechanism and related movable parts via an oil supply passage provided in the rotary shaft. However, in the case of the horizontal type compressor, since the rotation shaft is disposed substantially horizontally, the oil sump naturally formed at the bottom of the compressor cannot be utilized as conveniently as the vertical type compressor, and it is generally considered to provide an additional oil pumping mechanism for pumping the lubricating oil to the compression mechanism and the related movable parts of the horizontal type compressor.

Disclosure of Invention

The object of the present disclosure is to provide an improved fluid pumping device and a horizontal compressor having the same, to achieve at least one of the following objects: the structure is simplified, the cost is reduced, the application convenience is improved, sufficient lubrication is provided for a compression mechanism and related movable parts, the efficiency is improved, the operation stability and the reliability of the compressor are improved, and the like.

According to one aspect of the present disclosure, a fluid pumping device is provided. The fluid pumping device comprises: a pump structure comprising a first pump member and a second pump member that are matable with each other, wherein the first pump member is disposed inside the second pump member; a pump housing structure defining a sealed cavity in which the pump structure is rotatably fittable such that a suction cavity and a compression cavity are defined between the first and second pump members; and at least two suction paths configured such that, with rotation of the pump structure, fluid outside the fluid pumping device can be sucked into the suction chambers via the at least two suction paths, respectively, and/or at least two discharge paths configured such that, with rotation of the pump structure, compressed fluid in the compression chambers can be discharged from the fluid pumping device via the at least two discharge paths, respectively.

Preferably, in the above fluid pumping device, at least two suction chambers may be defined between the first pump member and the second pump member, the at least two suction paths being adapted to communicate with respective ones of the at least two suction chambers.

Preferably, in the above fluid pumping device, at least two compression chambers may be defined between the first pump member and the second pump member, and the at least two discharge paths may be adapted to communicate with respective ones of the at least two compression chambers.

Preferably, in the above fluid pumping device, the pump casing structure includes a pump housing having a first side and a second side opposite to each other, the first side of the pump housing being provided with a first recess in which the pump structure is fitted.

Preferably, in the above fluid pumping device, the first side of the pump housing is further provided with a second recess having a larger diameter than the first recess, so that a transition step is formed between the first recess and the second recess, and the pump casing structure further comprises a sealing cover plate fitted in the second recess at the first side of the pump housing against the transition step and the pump structure.

Preferably, in the above fluid pumping device, the fluid pumping device has a first suction chamber and a second suction chamber formed between the first pump member and the second pump member, and the fluid pumping device includes a first suction path fluidly connectable to the first suction chamber and a second suction path fluidly connectable to the second suction chamber. Wherein: the first suction path includes a first blind groove provided on a bottom wall of the first recess portion of the pump housing and a first through hole extending through a portion of the bottom wall of the first blind groove to the second side face; the second suction path includes a second blind groove provided on a bottom wall of the first concave portion of the pump housing and a second through hole extending through a portion of the bottom wall of the second blind groove to the second side face; and the first and second blind grooves are sequentially arranged in a rotational direction of the pump structure on a side of the bottom wall of the first recess portion corresponding to the suction chamber of the pump structure.

Preferably, in the above-described fluid pumping device, the fluid pumping device has a first compression chamber and a second compression chamber formed between the first pump member and the second pump member, and the fluid pumping device includes a first discharge path fluidly connectable to the first compression chamber and a second discharge path fluidly connectable to the second compression chamber. Wherein: the first discharge path includes a third blind groove provided on a bottom wall of the first recessed portion of the pump housing and a third through hole extending through a portion of a bottom wall of the third blind groove to the second side face; the second discharge path includes a fourth blind groove provided on a bottom wall of the first recess of the pump housing, and a radial groove extending radially from the fourth blind groove toward a center of the first recess and in fluid communication with the fourth blind groove; and the third and fourth blind grooves are sequentially arranged in a rotation direction of the pump structure on a side of the bottom wall of the first recess portion corresponding to the compression chamber of the pump structure.

Preferably, in the above fluid pumping device, the first blind groove, the second blind groove, the third blind groove, and the fourth blind groove are four arc-shaped grooves extending on the same circumference on the bottom wall of the first recess of the pump housing.

Preferably, in the above fluid pumping device: the first blind groove, the second blind groove, the third blind groove and the fourth blind groove are the same in length and are symmetrically arranged about the center of the first recessed portion; or the lengths of the first blind groove, the second blind groove, the third blind groove and the fourth blind groove are different, and/or two adjacent blind grooves are spaced apart at the same or different intervals in the first blind groove, the second blind groove, the third blind groove and the fourth blind groove.

Preferably, in the above fluid pumping device: a suction-side groove is formed on a bottom wall of the first concave portion of the pump housing on a side corresponding to the first suction chamber and the second suction chamber of the pump structure; and a first partition member that partitions the suction-side groove into the first and second blind grooves is provided in the suction-side groove, the first partition member being configured to be capable of adjusting relative extension lengths of the first and second blind grooves by changing a position of the first partition member in the suction-side groove.

Preferably, in the above fluid pumping device, the first partition assembly includes: two or more first snap tabs disposed in the suction side groove; and a first clamping block, wherein the first clamping block is constructed to be capable of being fixedly connected with the first clamping projection in a snap fit manner so as to separate the suction side groove into the first blind groove and the second blind groove.

Preferably, in the above fluid pumping device: a discharge-side groove is formed on a bottom wall of the first concave portion of the pump housing on a side corresponding to the first compression chamber and the second compression chamber of the pump structure; and a second partition member that partitions the discharge-side groove into the third and fourth blind grooves is provided in the discharge-side groove, the second partition member being configured to be capable of adjusting relative extension lengths of the third and fourth blind grooves by changing a position of the second partition member in the discharge-side groove.

Preferably, in the above fluid pumping device, the second partition assembly includes: two or more second snap tabs disposed in the discharge-side groove; and the second clamping block is constructed into a structure capable of being fixedly connected with the second clamping protruding part in a snap fit mode so as to separate the discharge side groove into the third blind groove and the fourth blind groove.

Preferably, in the above fluid pumping device: a first tube connecting portion is formed to protrude at a position corresponding to the first through hole on the second side surface of the pump housing, the first through hole further extending through the first tube connecting portion; and/or a second tube connecting part is formed in a protruding manner on the second side surface of the pump housing at a position corresponding to the second through hole, and the second through hole further extends through the second tube connecting part; and/or a third tube connecting part is formed to protrude at a position corresponding to the third through hole on the second side surface of the pump housing, the third through hole further extending through the third tube connecting part.

Preferably, in the above fluid pumping device, the pump structure is implemented as an internal gear pump and includes an internal gear part as the first pump member and an external gear part as the second pump member.

According to another aspect of the present disclosure, a horizontal compressor is provided. This horizontal compressor includes: a housing partitioned into a motor region including a motor and an oil storage region for storing lubricating oil; a rotating shaft disposed within the housing and driven by the motor, and having an oil supply passage provided therein to penetrate the rotating shaft; a compression mechanism that is arranged at a first end portion of the rotating shaft within the motor region and that can be supplied with lubricating oil via the oil supply passage of the rotating shaft; and a fluid pumping device as described above.

Preferably, in the horizontal compressor described above, the fluid pumping device is fitted at the second end portion of the rotary shaft in the oil reservoir region, and is capable of sucking lubricating oil from the oil reservoir region and the motor region via a first suction path and a second suction path of the at least two suction paths, respectively, and pumping the compressed lubricating oil into the oil reservoir region and the oil supply passage of the rotary shaft via a first discharge path and a second discharge path of the at least two discharge paths, respectively.

Preferably, in the horizontal compressor described above, the horizontal compressor further includes a first fluid supply pipe capable of guiding the lubricating oil in the oil reservoir region to the first suction path and a second fluid supply pipe capable of guiding the lubricating oil accumulated in the motor region to the second suction path.

Preferably, in the horizontal compressor described above, the first pump member of the fluid pumping device is fixedly fitted over the second end portion of the rotary shaft such that the radial groove in the first recess of the pump housing of the pump casing structure is aligned with the oil supply passage of the rotary shaft.

Preferably, in the horizontal compressor, the horizontal compressor further comprises: a partition secured to the housing within the housing and dividing the housing interior into the motor region and the oil reservoir region; and a trailing bearing seat on which the diaphragm is fitted and which is configured to support the second end of the rotary shaft, and to which the pump housing of the fluid pumping device is fixedly connected.

In accordance with the present disclosure, dual or more heavy pumping and/or dual or more draining of fluid (e.g., lubrication oil) may be achieved by the structural design of a single fluid pumping device. In particular, in the case where both the suction path and the discharge path are at least two paths, it is also possible to achieve multiple suction and multiple discharge of the fluid. This structural arrangement simplifies the structure and reduces the cost. Preferably, the first suction chamber in the rotational direction of the pump structure is made to communicate with the oil reservoir region, and the lubricating oil can be preferentially sucked from the oil reservoir region after the compressor is started. The provision of an additional suction chamber communicating with the motor region can avoid damage to the associated components due to the inability to draw sufficient lubricant from the oil reservoir region, can improve compressor operation stability, and is beneficial to the virtuous cycle of the lubricant. Further, making the first compression chamber in the rotational direction of the pump structure communicated to the oil reservoir region facilitates preferentially discharging gas that may be drawn into the suction chamber to the oil reservoir region, and can avoid discharging gas into the rotary shaft, whereby the reliability and stability of the operation of the fluid pumping device and the compressor can be improved. In addition, the structural configuration of the elongated recess and the position-adjustable partition assembly disposed therein allows the suction and discharge amount of the pump structure to be adjusted according to the needs of the actual application, thereby improving the applicability and flexibility of the fluid pumping device of the present disclosure.

Drawings

The features and advantages of one or more embodiments of the present disclosure will become more readily apparent from the following description taken in conjunction with the accompanying drawings. The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way, the drawings are not to scale, and some features may be exaggerated, minimized, or angled to show details of particular components. In the drawings:

fig. 1 illustrates a longitudinal sectional view of a horizontal type compressor according to an embodiment of the present disclosure;

FIG. 2 is a partially enlarged schematic view of the horizontal compressor shown in FIG. 1;

FIG. 3 shows a schematic assembly of a fluid pumping device with a rotating shaft according to one embodiment of the present disclosure;

FIG. 4 shows an exploded schematic view of the fluid pumping device shown in FIG. 3 and a rotating shaft;

FIG. 5 shows an exploded schematic view of a fluid pumping device according to one embodiment of the present disclosure;

FIG. 6 is a perspective view of a portion of the fluid pumping device of FIG. 5 with the sealing cover removed to clearly show how the pump structure fits within the pump housing;

FIG. 7 illustrates a cross-sectional schematic view of a pump housing and pump structure according to one embodiment of the present disclosure;

FIG. 8 illustrates a schematic top view of a pump housing according to one embodiment of the present disclosure;

FIG. 9 shows a cross-sectional schematic view of the pump housing shown in FIG. 8;

10A, 10B, 10C respectively illustrate the relative positional relationship of the inner and outer gear members at different instants in time during operation of the pump structure in accordance with an embodiment of the present disclosure;

FIG. 11 illustrates a schematic top view of a pump housing according to another embodiment of the present disclosure;

FIG. 12 illustrates a schematic view of the pump construction according to the present disclosure mated with the pump housing of FIG. 11 at some point during operation;

13A, 13B, and 13C illustrate a schematic top view, a schematic perspective view, and a schematic cross-sectional view, respectively, of a pump housing according to another embodiment of the present disclosure;

FIGS. 14A and 14B show a plan view and a perspective view, respectively, of a mating relationship of the pump housing of FIG. 13 with a corresponding snap-in block;

FIGS. 15A and 15B show a plan view and a perspective view, respectively, of an alternative mating relationship of the pump housing of FIG. 13 with a corresponding snap-in block; and

fig. 16A and 16B illustrate perspective views of a first card block and a second card block, respectively, according to an embodiment of the present disclosure.

Detailed Description

The following description of the various embodiments of the disclosure is merely exemplary in nature and is in no way intended to limit the disclosure, its application, or uses. The same reference numerals are used to designate the same components in the respective drawings, and thus the configurations of the same components will not be described repeatedly.

In the present disclosure, for convenience of description, the fluid pumping device according to the present disclosure is explained by taking an application in a horizontal compressor as an example. However, it will be appreciated that the fluid pumping device according to the present disclosure is not limited to compressor applications, and may be used in any feasible application requiring the provision of a fluid (e.g., lubricating oil) to associated components.

First, a basic structure of a horizontal type compressor 100 to which a fluid pumping device 180 according to the present disclosure is applied will be briefly described with reference to fig. 1.

As shown in fig. 1, the horizontal type compressor 100 may generally include a housing 110, a motor 120, a rotating shaft 130 driven by the motor 120, a compression mechanism 140 disposed at one end (herein, for convenience of description, referred to as a first end) of the rotating shaft 130, a trailing bearing housing 150 supporting the rotating shaft 130 at the other end (herein, referred to as a second end) of the rotating shaft 130.

The case 110 may include a case body 111 and first and second end caps 112 and 113 at both ends of the case body 111, respectively. The motor 120, the rotating shaft 130, the compression mechanism 140, and the trailing bearing housing 150 may all be disposed inside the housing 110. The motor 120 may include a stator 121 fixed to the case body 111 and a rotor 122 disposed inside the stator 121. The rotation shaft 130 extends substantially in the horizontal direction. The rotating shaft 130 is driven by the motor 120. The rotation shaft 130 may be fixed to the rotor 122 so as to be rotatable with the rotation of the rotor 122. A first end 131 of the rotating shaft 130 may be supported by the main bearing housing 170, and a second end 132 of the rotating shaft 130 opposite to the first end 131 may be supported by the trailing bearing housing 150.

The compression mechanism 140 may be driven by the rotary shaft 130 to compress a working fluid (e.g., refrigerant) introduced into the compression mechanism 140. Compression mechanism 140 may include a non-orbiting scroll member 141 and an orbiting scroll member 142 in meshing engagement with each other. As compression mechanism 140 operates, a series of compression chambers are formed between non-orbiting scroll member 141 and orbiting scroll member 142, so that a working fluid drawn into each compression chamber can be compressed. In the present example, the compression mechanism 140 employs a scroll type structure. However, it is understood that the compression mechanism may take other possible configurations, and is not limited to the configuration in this example.

In order to enable the compressor to operate stably, it is generally necessary to supply lubricating oil to relevant movable parts of the compressor (e.g., a compression mechanism, contact portions of a rotating shaft and corresponding bearing housings, etc.). In the prior art, an oil supply passage extending through the rotating shaft in the longitudinal direction thereof is generally provided inside the rotating shaft so that lubricating oil is pumped in from the second end portion of the rotating shaft and supplied to the compression mechanism disposed at the first end portion of the rotating shaft through the oil supply passage. Further, a branched oil supply path in fluid communication with the oil supply passage may be provided on the rotary shaft so as to further distribute the lubricating oil introduced into the oil supply passage to other movable parts requiring lubrication. The oil supply passage in the rotary shaft generally includes a concentric bore (see the portion indicated at 134 in fig. 1) disposed concentrically with the rotary shaft and an eccentric bore (not shown herein) communicating with the concentric bore and being skewed with respect to the rotational axis of the rotary shaft.

Generally, pumping of the lubricating oil into the oil supply passage is assisted by an additionally provided oil pumping mechanism. With horizontal compressors, it is not possible to conveniently utilize the "natural" oil sump accumulated at the bottom of the compressor (i.e. at the second end of the rotating shaft) as with vertical compressors, since the rotating shaft thereof is generally horizontally arranged. Therefore, the structural arrangement of the oil pumping mechanism of the horizontal compressor needs to consider more factors than that of the vertical compressor. In the prior art, there are design ideas for sucking the lubricating oil accumulated on the high pressure side to the low pressure side by utilizing the pressure difference between the high pressure side and the low pressure side of the compressor, and there are structural designs of a shell-in-shell (that is, a separate oil reservoir is provided in the compressor), and the like. The existing oil pumping mechanism plays a good role in promoting the operational reliability and stability of the horizontal compressor. However, there are also some applications where further improvements are needed. The present disclosure is intended to provide an improved fluid pumping device and horizontal compressor in order to achieve at least one of the following objectives: the structure is simplified, the cost is reduced, the application convenience is improved, sufficient lubrication is provided for a compression mechanism and related movable parts, the efficiency is improved, the operation stability and the reliability of the compressor are improved, and the like. In particular, for a variable speed horizontal compressor, the operational stability and reliability of the horizontal compressor can be greatly improved using the fluid pumping device according to the present disclosure.

A fluid pumping device 180 and its application in a horizontal compressor 100 according to the present disclosure will now be described in detail with reference to fig. 1 to 16B.

As shown in fig. 1, a partition plate 160 may be provided at a position near the second end 132 of the rotary shaft 130 in the horizontal type compressor 100. The partition 160 may be provided to partition the interior of the housing 110 into a motor region MR where the motor 120 is provided and a reservoir region SR where lubricant is stored. It is understood that for a low pressure side horizontal compressor in which the motor 120 is disposed at the low pressure side, both the motor region MR and the oil reservoir region SR may be located at the low pressure side of the horizontal compressor.

The trailing bearing seat 150 supporting the rotary shaft 130 may extend through a central region of the diaphragm 160 so that the diaphragm 160 may be fitted over the trailing bearing seat 150. The partition 160 may also be fixedly connected to the housing 110 at an outer periphery thereof (e.g., welded at a connection area of the housing body 111 and the second end cap 113). The partition 160 may take an already available structure. Accordingly, the structure of the separator 160 is not excessively described or limited in this disclosure.

A fluid pumping device 180 (in the present disclosure, the fluid may be lubricating oil) according to the present disclosure may be fitted on the second end 132 of the rotating shaft 130 and may be fixedly connected to the trailing bearing housing 150 by a fastening means such as a screw 190. Fig. 2 is a partially enlarged schematic view of the horizontal compressor shown in fig. 1, illustrating details of the connection between the fluid pumping device 180 and the second end 132 of the rotating shaft 130 and the trailing bearing housing 150 according to the present disclosure. The assembled relationship between the fluid pumping device 180 and the rotating shaft 130 may be further referenced with respect to fig. 3 and 4. Further details regarding the assembly between the fluid pumping device 180 and the rotating shaft 130 and the trailing bearing housing 150 will be described further below.

Fig. 5 shows an exploded schematic view of a fluid pumping device 180 according to one embodiment of the present disclosure. As shown in fig. 5, a fluid pumping device 180 according to the present disclosure may include a pump structure 184 having a first gear component 1841 (an inner gear component and corresponding to a first pump component according to the present disclosure) and a second gear component 1842 (an outer gear component and corresponding to a second pump component according to the present disclosure), and a pump housing structure. A sealed cavity may be defined in the pump housing structure for receiving the pump structure 184. Pump structure 184 can be rotatably fitted in the sealed cavities such that a plurality of cavities can be defined between first gear member 1841 and second gear member 1842 by the pump housing structure and first gear member 1841 and second gear member 1842. Here, it is noted that although the present disclosure is described herein with an internal gear pump as an example, it should be understood that the concepts of the present disclosure are not limited to internal gear pumps and may be applied to other suitable pump configurations as well. For example, in a sliding vane pump (i.e., a pump structure including a stationary cylinder, a rotor disposed within the cylinder, and a sliding vane separating several chambers including a suction chamber and a compression discharge chamber), at least two suction paths and/or at least two discharge paths may also be provided for a single pump mechanism. In this case, the cylinder corresponds to the second pump component according to the present disclosure and the rotor corresponds to the first pump component according to the present disclosure.

According to an example embodiment of the present disclosure, the pump housing structure may include a pump housing 186 and a sealing cover plate 182. Referring collectively to fig. 2, the pump housing 186 and the seal cover 182 may collectively define the previously described seal cavity for receiving the pump structure 184.

The first gear member 1841 and the second gear member 1842 of the pump structure 184 can cooperate with one another in a known internal gear pump manner. The first gear component 1841 may be configured to fit within the second gear component 1842 to cooperatively operate with the second gear component 1842. That is, the first gear member 1841 may be configured as a driving wheel that may be rotated by a driving force from another member (e.g., the rotary shaft 130 of the horizontal compressor). The second gear member 1842 may be configured as a driven wheel that may be rotated by the first gear member 1841 in response to rotation of the first gear member 1841. For example, in the example embodiment shown in fig. 1-4, the first gear member 1841 may be mounted on the second end 132 of the rotational shaft 130 such that the first gear member 1841 is actuated by the rotational shaft 130. Rotation of the first gear member 1841 may further cause rotation of the second gear member 1842.

It is appreciated that, for a particular application, the first gear component 1841 may be disposed eccentrically with respect to the second gear component 1842 such that external teeth of the first gear component 1841 and internal teeth of the second gear component 1842 are capable of matingly engaging one another. When the pump structure 184 is actuated and operates normally, the plurality of chambers defined between the first gear member 1841 and the second gear member 1842 may include a suction chamber on a suction side (i.e., a chamber that sucks in fluid as a volume of rotation of the pump structure 184 gradually increases) and a compression chamber on a compression side (i.e., a chamber that compresses fluid therein as a volume of rotation of the pump structure 184 gradually decreases). The first gear member 1841 and the second gear member 1842 may be suitably configured such that one or more suction cavities may be formed between the first gear member 1841 and the second gear member 1842, and one or more compression cavities may be formed as the pump structure 184 operates (see fig. 10A-10C).

The fluid pumping device 180 according to the present disclosure may be provided with at least two suction paths to suck fluid outside the fluid pumping device 180 into the suction chamber via the at least two suction paths and compress the sucked fluid as the pump structure 184 operates. This arrangement provides the fluid pumping device with dual pumping capabilities, thereby allowing fluid to be pumped separately from different fluid sources. The fluid pumping device 180 may also be provided with a discharge path such that the compressed fluid in the compression chamber can be discharged from the fluid pumping device via the discharge path. For example, the fluid pumping device may have only one discharge path, so that the fluid after being compressed can be discharged through the one discharge path. The fluid pumping device may also have two or more discharge paths so that the compressed fluid can be pumped to different downstream components. Further, it is conceivable that, in the fluid pumping device according to the present disclosure, in the case where the suction path is only one or multiple, at least two discharge paths (e.g., two paths) may be provided so as to supply, for example, the lubricating oil sucked from only one suction path (e.g., from the oil sump) to different portions requiring lubricating oil (e.g., an oil supply passage of the rotary shaft and another oil supply passage capable of supplying lubricating oil to the trailing end bearing) via the at least two discharge paths, respectively.

According to an embodiment of the present disclosure, at least two suction lumens may be defined between the first gear component 1841 and the second gear component 1842, the at least two suction paths being adapted to communicate with respective ones of the at least two suction lumens (i.e., each suction path communicating with a different suction lumen). Thus, fluid drawn through the two-way suction path may be compressed by more than two suction lumens.

According to an embodiment of the present disclosure, the aforementioned discharge path may include at least two discharge paths. The at least two discharge paths may be configured to enable the compressed fluid in the compression chambers to be discharged from the fluid pumping device via the at least two discharge paths, respectively. Thereby, the compressed fluid can be supplied to different components downstream, respectively.

According to an embodiment of the present disclosure, at least two compression chambers may be defined between the first gear member 1841 and the second gear member 1842, and the at least two discharge paths may be configured and adapted to communicate with a respective compression chamber of the at least two compression chambers (i.e., each discharge path communicates with a different compression chamber). Thus, the fluid may be compressed by at least two compression chambers.

According to the present disclosure, as for the relationship between the number of the suction paths and the number of the suction chambers, the number of the suction paths may be greater than the number of the suction chambers (in this case, for example, two suction paths may communicate with the same suction chamber), the number of the suction paths may be equal to the number of the suction chambers (in this case, for example, each suction path communicates with different suction chambers respectively, i.e., communicates one-to-one), or the number of the suction paths may be less than the number of the suction chambers (in this case, for example, at least one suction chamber does not communicate with any suction path). A similar arrangement is also possible for the relationship between the number of discharge paths and the number of compression chambers.

As previously mentioned, the pump structure 184 of the present disclosure operates in a manner known in the art, and the pump structure 184 described in the present disclosure can be readily implemented by those skilled in the art in light of the description of the present disclosure in combination with the actual requirements. Accordingly, the structural arrangement of the first and second gear components 1841 and 1842 will not be overly described in this disclosure.

As shown in fig. 2, 5, 7, 8, and 9, the sealing cover 182 may be a flat plate-shaped member. The pump housing 186 according to the present disclosure may have a first side 1861 and a second side 1862 opposite each other. A first recess 1863 may be formed on the first side 1861 of the pump housing 186. The pump structure 184 can be integrally fitted in the first recess 1863. It is understood that the first recess 1863 may be configured such that the second gear member 1842 of the pump structure 184 is rotatably fitted therein, that is, the depth of the first recess 1863 may be substantially equal to the thickness of the second gear member 1842, and the diameter of the first recess 1863 may be slightly larger than the outer diameter of the second gear member 1842. The sealing cover plate 182 may be disposed at a first side 1861 of the pump housing 186 to define, with the pump housing 186, a sealed cavity for housing the pump structure 184.

As shown in fig. 2 and 9, in one embodiment according to the present disclosure, a second recess 1864 may be provided on the first side 1861 of the pump housing 186. The diameter of the second recess 1864 may be larger than the diameter of the first recess 1863, so that a transitional step may be formed between the first recess 1863 and the second recess 1864. The sealing cover plate 182 may be fitted into the second recess 1864 against this transition step, so that the aforementioned sealed cavity is formed by the first recess 1863. Alternatively, the seal cover plate 182 may be fixedly coupled to the pump housing 186 by structure in a particular application after the fluid pumping device according to the present disclosure is applied in that particular application. For example, in applications of the horizontal compressor 100 according to the present disclosure as shown in fig. 1 and 2, the fixed connection between the seal cover plate 182 and the pump housing 184 may be achieved by means of the aft bearing housing 150, as described below.

Alternatively, in an embodiment not shown, the sealing cover plate may be fixedly connected to the pump housing by means of a further connecting member. For example, the sealing cover plate may have a large diameter portion that may abut against the first side 1861 of the pump housing 186 and a small diameter portion that may be disposed in the second recess 1864 and may fixedly couple the sealing cover plate 182 directly to the pump housing 186 using a fixed coupling structure such as a screw, snap-fit structure, or the like.

It will be appreciated that the pump housing structure may have a different configuration than the seal cover plate and pump housing, and that the configuration of the seal cover plate 182 and pump housing 186 is not limited to that described and illustrated in this disclosure, and that the configuration of the associated structure may be modified as appropriate depending on the configuration of the particular application in which the fluid pumping device is used.

As mentioned above, the fluid pumping device 180 of the present disclosure may be fitted on the trailing bearing housing 150 of the horizontal compressor 100 and the second end 132 of the rotary shaft 130. According to an example embodiment of the present disclosure, as shown in fig. 4 and 5, the second end portion 132 of the rotating shaft 130 may have a D-section end 1321, and the inner circumferential surface of the first gear member 1841 may have a D-section matching the section of the D-section end 1321 of the rotating shaft 130. As such, the first gear member 1841 may be fitted (e.g., press-fit) in a form-fit manner over the D-shaped cross-sectional end 1321 of the rotational shaft 130. Advantageously, the first gear member 1841 may include a flange portion P, whereby an engagement area between the first gear member 1841 and the second end portion 132 of the rotation shaft 130 may be increased, so that the connection therebetween is more stable. The flange portion P may protrude from the second gear member 1842 when the first gear member 1841 is fitted in the second gear member 1842. Alternatively, the first gear member 1841 may be fixedly fitted at the second end 132 of the rotating shaft 130 in other detachable manners.

A receiving slot 152 may be provided on a side of the trailing bearing seat 150 facing away from the motor 120. After the sealing cover plate 182 and the pump structure 184 (particularly the first gear member 1841) are fitted over the D-section end 1321 of the rotating shaft 130 (the sealing cover plate 182 may be fitted over the flange portion P of the first gear member 1841), the pump housing 186 may be inserted into the receiving slot 152 of the aft bearing housing 150. The pump housing 186 may then be fixedly attached in the receiving slot 152 by a fastening means such as a screw 190.

As mentioned above, a fluid pumping device according to the present disclosure may include at least two suction chambers, at least two compression chambers, at least two suction paths, and at least two discharge paths. The at least two suction paths may correspond to the at least two suction chambers and the at least two discharge paths may correspond to the at least two compression chambers. That is, each suction path may be configured to: upon activation of the fluid pumping device (or upon actuation of the first gear member 1841), as the pump structure 184 rotates, fluid from outside the fluid pumping device 180 (e.g., a catheter connected to the fluid pumping device 180) can be drawn into the corresponding suction lumen via the suction path to compress the fluid during subsequent rotation of the pump structure 184; and each discharge path may be configured to discharge fluid, which has been compressed in the corresponding compression chamber, from the fluid pumping device 180 (e.g., to the oil storage region SR of the horizontal compressor 100 or to the rotary shaft 130, as described below).

Preferably, the at least two suction paths may be configured such that at each time during rotation of the pump arrangement 184, each suction path corresponds to a separate suction chamber (in particular, each suction path does not communicate with each other), thereby enabling fluid to be sucked into each corresponding suction chamber via each suction path. In other words, the number of suction paths may correspond to the number of suction chambers such that at each instant of rotation of the pump structure 184, each suction path corresponds to a suction chamber into which external fluid can be drawn.

Similarly, preferably, the at least two discharge paths may be configured such that at each time during rotation of the pump structure 184, each discharge path corresponds to one compression chamber (in particular, each discharge path does not communicate with each other), thereby enabling discharge of compressed fluid in the corresponding compression chamber via each discharge path. In other words, the number of discharge paths may correspond to the number of compression chambers such that at each instant of rotation of the pump arrangement 184, each compression path corresponds to a separate compression chamber to enable discharge of fluid compressed within the respective compression chamber.

In the following description, for convenience of description, a fluid pumping device according to the present disclosure is described in detail by taking an example in which the fluid pumping device includes two suction chambers, two compression chambers, two suction paths, and two discharge paths. However, it is understood that more than two suction and compression chambers may be formed therebetween and more than two suction paths and more than two discharge paths may be provided accordingly, as desired for a particular application, by appropriately configuring the first and second gear members 1841 and 1842. For example, a configuration including three suction chambers, three compression chambers, a three-way suction path, and a three-way discharge path, or a configuration including four suction chambers, four compression chambers, a four-way suction path, and a four-way discharge path.

According to one embodiment of the present disclosure, the fluid pumping device 180 may include a first suction path and a second suction path two-way suction path. As shown in fig. 8 and 9, a first blind groove G1 and a second blind groove G2 may be provided on a bottom wall of the first recess 1863 of the pump housing 186 to be spaced apart from each other. Also, a first through hole H1 may be provided in the first blind groove G1, and a second through hole H2 may be provided in the second blind groove G2. Wherein the first through hole H1 may occupy only a portion of the bottom wall of the first blind groove G1. Likewise, the second through hole H2 may occupy only a part of the bottom wall of the second blind groove G2. Thereby, a first suction path may be formed by the first blind groove G1 and the first through hole H1, and a second suction path may be formed by the second blind groove G2 and the second through hole H2.

It will be appreciated that the first and second suction paths may be disposed on a side corresponding to the pump structure 184 where the suction cavity is formed. That is, the first and second blind grooves G1 and G2 may be provided on a side of the bottom wall of the first recess 1863 of the pump housing 186 corresponding to the suction chamber of the pump structure 184. The first blind groove G1 and the second blind groove G2 may be sequentially arranged in the rotation direction of the pump structure 184. For example, in the view shown in fig. 8, assuming that the pump structure 184 is to be rotated in a clockwise direction, the first blind groove G1 and the second blind groove G2 may be sequentially arranged in the clockwise direction. In the embodiment shown in fig. 8, the first through hole H1 is disposed at an end of the first blind groove G1 near the second blind groove G2, and the second through hole H2 is disposed at an end of the second blind groove G2 near the first blind groove G1. It is understood that the positional arrangement of the first through hole H1 in the first blind hole G1 and the positional arrangement of the second through hole H2 in the second blind groove G2 may be synthetically determined in combination with the structural arrangement of the first gear member 1841 and the second gear member 1842 and the factors of the amount of fluid suction and discharge actually required for a specific application, etc., without being limited by this disclosure.

Fluid pumping device 180 may also include a first discharge path and a second discharge path, a two-way discharge path. With continued reference to fig. 8 and 9, a third blind groove G3 and a fourth blind groove G4 may be further provided on the bottom wall of the first recess 1863 of the pump housing 186 so as to be spaced apart from each other. Also, a third through hole H3 may be provided in the third blind groove G3. Similarly, the third through hole H3 may occupy only a portion of the bottom wall of the third blind groove G3. Additionally, a radial groove G5 may also be provided on the bottom wall of the first recess 1863 extending radially from the center of the first recess 1863 toward the fourth blind groove G4 and in fluid communication with the fourth blind groove G4. Thereby, a first discharge path may be formed by the third blind groove G3 and the third through hole H3, and a second discharge path may be formed by the fourth blind groove G4 and the radial groove G5. Similarly, although in the embodiment shown in fig. 8, the third through hole H3 is disposed at an end of the third blind groove G3 close to the fourth blind groove G4, the position of the third through hole H3 in the third blind groove G3 is not limited by the present disclosure.

It is understood that the first and second discharge paths may be disposed at a side where the compression chambers are formed corresponding to the pump structure 184. That is, the third blind groove G3 and the fourth blind groove G4 may be provided on a side of the bottom wall of the first recess 1863 of the pump housing 186 corresponding to the compression chamber of the pump structure 184. The third blind groove G3 and the fourth blind groove G4 may be sequentially arranged in the rotation direction of the pump structure 184. For example, in the view shown in fig. 8, assuming that the pump structure 184 is to be rotated in a clockwise direction, the third blind groove G3 and the fourth blind groove G4 may be sequentially arranged in the clockwise direction, i.e., the third blind groove G3 and the fourth blind groove G4 may be sequentially arranged at a position downstream of the second blind groove G2 in the clockwise direction from the view shown in fig. 8.

Alternatively, as shown in fig. 8 and 11, the first, second, third and fourth blind grooves G1, G2, G3 and G4 may be four segments of arcuate grooves extending on the same circumference on the bottom wall of the first recess 1863 of the pump housing 186. Still alternatively, as shown in fig. 8, the lengths of the first, second, third, and fourth blind grooves G1, G2, G3, and G4 (i.e., the lengths along which the blind grooves extend in the longitudinal direction thereof) may be the same, and the four blind grooves may be arranged centrosymmetrically to each other. Alternatively, as shown in fig. 11 and 12, the first blind groove G1, the second blind groove G2, the third blind groove G3, and the fourth blind groove G4 may have different lengths. Still alternatively, adjacent two of the first blind groove G1, the second blind groove G2, the third blind groove G3 and the fourth blind groove G4 may be spaced apart by the same or different intervals (in the case where four blind grooves are on the same circumference, the intervals may be the length of a circular arc on the circumference).

In this way, the oil suction amount and/or oil suction speed, the oil discharge amount and/or the oil discharge speed of the fluid pumping device can be adjusted accordingly by adjusting the length and/or position of each blind groove and by adjusting the size and/or position of the through hole in each blind groove, thereby meeting different application requirements.

In the embodiment described above in connection with fig. 8 and 11, the first blind groove G1, the second blind groove G2, the third blind groove G3, and the fourth blind groove G4 are each independently formed, and the position and size of each blind groove are fixed. Alternatively, appropriate modifications may be made to the relevant structures so that the relevant dimensions may be adjusted as required by the actual application, thereby further enhancing the convenience and flexibility of application of the fluid pumping device. Fig. 13A-16B illustrate examples of such embodiments.

In another embodiment according to the present disclosure as shown in fig. 13A-16B, the first blind groove G1 and the second blind groove G2 are two distinct portions separated by the same groove. Similarly, the third blind groove G3 and the fourth blind groove G4 may be two distinct portions separated by the same groove. The separation of different parts in the same groove can be realized by utilizing the separation component arranged in the groove, and the position of the separation component in the groove can be adjusted, so that the suction and discharge amount of the fluid pumping device can be adjusted according to the requirement of practical application, and different suction and discharge ratios can be realized.

As shown in fig. 13A-15B, a suction-side groove EG1 may be formed on the bottom wall of the first recess 1863 of the pump housing 186, and the suction-side groove EG1 may be formed on the bottom wall of the first recess 1863 on a side corresponding to the suction cavity of the pump structure 184. As shown in fig. 13A-15B, the suction side groove EG1 may be an arcuate slot having a relatively long length (e.g., extending over an angular range of 120-160 degrees). A first partition assembly whose position is adjustable may be provided in the suction side groove EG1 so that the suction side groove EG1 may be partitioned into a first blind groove G1 and a second blind groove G2, which are spaced apart from each other, by the first partition assembly, and the relative sizes of the first blind groove G1 and the second blind groove G2 may be adjusted by adjusting the position of the first partition assembly in the suction side groove EG1 so as to meet different application requirements.

In the embodiment shown in fig. 13A-15B, two or more first snap tabs P1 may be provided in the suction side groove EG 1. The two or more first catching tabs P1 may be distributed on the bottom wall of the suction side groove EG1 at a predetermined interval. Alternatively, in a non-illustrated embodiment, the first snap projections may also be distributed in an irregular manner on the bottom wall of the suction-side groove.

As shown in fig. 16A and 16B, a first click block 187 may be provided. The first snap block 187 may include a snap-in projection 1871 and a separating body 1872. In which the catching protrusion 1871 may be caught between adjacent two first catching protrusions P1, and the partition body portion 1872 may partition the suction-side groove EG1 into two parts separated from each other, i.e., a first blind groove G1 and a second blind groove G2. The snap protrusions 1871 may be two or more, thereby making it possible to make the first snap block 187 snap-coupled more firmly between the respective first snap protrusions P1 in the suction-side groove EG 1.

In the present embodiment, the first partitioning member is configured by the first engaging projection P1 and the first engaging piece 187. However, it is to be understood that the first partition assembly may have other different configurations or forms. For example, a plurality of notches may be further provided in the suction-side groove, and an insert block that can be inserted into the notches and can partition the suction-side groove may be provided. Alternatively, configurations with more complex structures are conceivable, such as providing a partition in the suction-side groove and actuating it by an external force to effect a change in its position and thus a change in the size of the first and second blind grooves G1 and G2, to meet practical requirements.

Similarly, a discharge side groove EG2 may be formed on the bottom wall of the first recess 1863 of the pump housing 186. The discharge side groove EG2 may be located on a side of the bottom wall of the first recess 1863 corresponding to the compression chamber of the pump structure 184. The discharge side groove EG2 may be disposed opposite to the suction side groove EG 1. The discharge side groove EG2 may have the same or different structure and form as the suction side groove EG 1. In the example shown in fig. 13A to 15B, the discharge-side groove EG2 has the same structure and form as the suction-side groove EG1, and the structure of the discharge-side groove EG2 is not described in detail. Further, the discharge side groove EG2 is also in fluid communication with the above-described radial groove G5.

Similarly, a second partition member whose position is adjustable may be provided in the discharge side groove EG2 so that the discharge side groove EG2 may be partitioned into the third and fourth blind grooves G3 and G4 by the second partition member, and the relative sizes of the third and fourth blind grooves G3 and G4 may be adjusted by adjusting the position of the second partition member in the discharge side groove EG2 so as to meet different application requirements.

Similar to the structure of the first partition assembly, the second partition assembly may include two or more second snap protrusions P2 provided in the discharge-side groove EG2 and a second snap block 188 configured to snap-fit with the two or more second snap protrusions P2 to partition the discharge-side groove EG2 into a third blind groove G3 and a fourth blind groove G4. It will be appreciated that the second snap projection P2 may have the same structure and arrangement as the first snap projection P1, as shown in fig. 13A-16B, for design and processing convenience, etc. And the second catching block 188 may have the same structural form as the first catching block 187. Alternatively, the second snap projection P2 and the second snap block 188 may have a different structure and form than the first snap projection P1 and the first snap block 187, as the case may be.

In the embodiment as shown in fig. 13A to 15B, the first through hole H1 and the second through hole H2 may be formed at both end portions of the suction-side groove EG1, respectively, and the third through hole H3 may be formed at one end of the discharge-side groove EG2 adjacent to the second through hole H2. The other end of the discharge side groove EG2 may be fluidly connected to the radial groove G5.

In the embodiment shown in fig. 14A and 14B, the first and second click blocks 187 and 188 are arranged substantially opposite to each other. The first engaging block 187 is closer to the first through hole H1, and the second engaging block 188 is closer to the third through hole H3. Fig. 15A and 15B show different arrangements in which the first catch block 187 is closer to the second through hole H2 and the second catch block 188 is closer to the radial groove G5.

Therefore, by arranging the adjustable separation assemblies of the first separation assembly and the second separation assembly as described above, the existing fluid pumping device can be easily subjected to fine adjustment of local structures according to practical application, so that the applicability of the fluid pumping device according to the present disclosure can be improved, and the cost can be saved.

Advantageously, a first tube connection 1865 may be formed protruding at a position corresponding to the first through hole H1 on the second side 1862 of the pump housing 186, and a second tube connection 1866 may be formed protruding at a position corresponding to the second through hole H2 on the second side 1862 of the pump housing 186, to facilitate connection of an external fluid line to the fluid pumping device 180. It is understood that the first through hole H1 may further extend through the first pipe connection 1865 and the second through hole H2 may further extend through the second pipe connection 1866. Advantageously, a third tube connection 1867 may also be formed protruding on the second side 1862 of the pump housing 186 at a location corresponding to the third through hole H3, in order to guide fluid within the corresponding compression chamber (in the illustrated embodiment of the present disclosure, the first compression chamber PC1) out of the fluid pumping device 180 via the first discharge path. Similarly, a third through hole H3 may further extend through the third pipe connection 1867.

As is apparent from the foregoing description, in the fluid pumping device 180 according to the present disclosure, unlike the arrangement in which the third through hole H3 is provided in the third blind groove G3, the fourth blind groove G4 may directly fluidly communicate with the radial groove G5 without providing an additional through hole. With this configuration, the fluid compressed by the compression chambers PC1 and PC2 of the fluid pumping device 180 can be discharged from both sides of the fluid pumping device 180.

It should be noted here that, in the above-described exemplary embodiment, the first suction path may include the first blind groove G1 and the first through hole H1. It will be appreciated that in embodiments not shown, the first blind groove G1 may be omitted, i.e. only through holes are provided which extend through the bottom wall and the second side of the first recess of the pump housing. Similarly, the second suction path may not include the second blind groove G2 but only include through holes penetrating the bottom wall and the second side of the first recess of the pump housing, and the first discharge path may not include the third blind groove G3 but only include through holes penetrating the bottom wall and the second side of the first recess of the pump housing.

The application of the fluid pumping device 180 according to the present disclosure in the horizontal compressor 100 and its related operation will be further described with reference to fig. 1-16B.

In the application of the horizontal compressor 100 as shown in fig. 1, the fluid pumping device 180 is located in the oil storage region SR within the horizontal compressor 100. As can be seen in the enlarged view of FIG. 2, when in place, the first gear member 1841 is secured in place over the D-section end 1321 of the second end portion 132 of the rotating shaft 130. The sealing cover 182 fits over the flange portion P of the first gear member 1841. The pump housing 186 is inserted into the receiving slot 152 of the aft bearing seat 150. From the perspective of the plan view shown in fig. 2, the right side of the D-section end 1321, the first gear member 1841, and the second gear member 1842 abut the bottom wall of the first recess 1863 of the pump housing 186. The first gear component 1841 and the second gear component 1842 abut the seal cover plate 182 on the left side. A suction chamber (only SC2 is shown) and a compression chamber (only PC2 is shown) are formed between the first gear member 1841 and the second gear member 1842. It is noted here that the mounting locations of fluid pumping device 180 on rotating shaft 130 and aft bearing housing 150 shown in fig. 2 may be different than shown in other views of the present disclosure in order to clearly show the relative positional relationship between the suction and compression cavities formed between first gear member 1841 and second gear member 1842 and the respective suction and discharge paths.

It can also be seen that in the condition shown in fig. 2, the concentric bore 134 in the rotating shaft 130 is fluidly connected to the radial groove G5, and thus may be fluidly connected to the fourth blind groove G4. And the second suction lumen SC2 is in fluid communication with the second blind groove G2 and the second through hole H2. Here, it can be understood that the length of the radial groove G5 extending from the fourth blind groove toward the center of the first recess 1863 on the bottom wall of the first recess 1863 of the pump housing 186 is set such that the compressed fluid from the second compression chamber PC2 can be pumped into the concentric hole 134 of the rotary shaft 130 via the fourth blind groove, the radial groove G5. Preferably, the termination point at which the radial groove G5 extends from the fourth blind groove toward the center of the first recess 1863 is preferably no more than the coverage of the concentric bore 134 in the rotating shaft 130, so as to prevent part of the lubricating oil from seeping into the suction cavity and the suction path via the gap between both the D-section end 1321 of the rotating shaft 130 and the first gear member 1841 and the bottom wall of the first recess 1863.

According to an embodiment of the present disclosure, in order to facilitate pumping of the lubricating oil accumulated at the bottom of the horizontal compressor, a first fluid supply pipe LP1 and a second fluid supply pipe LP2 may be further provided. Therein, the first fluid supply line LP1 may be connected to the first tube connection 1865 on the second side 1862 of the pump housing 186, and the second fluid supply line LP2 may be connected to the second tube connection 1866 on the second side 1862 of the pump housing 186.

The first and second fluid supply pipes LP1 and LP2 may be extended further to appropriate positions in the oil storage region SR and the motor region MR of the horizontal compressor 100, respectively, so that lubricating oil can be sucked from the oil storage region SR and the motor region MR of the horizontal compressor 100, respectively. Preferably, the first fluid supply pipe LP1 may be extended to a proper position in the oil storage region SR of the horizontal compressor 100, and the second fluid supply pipe LP2 may be extended to a proper position in the motor region MR of the horizontal compressor 100. Thus, during operation of the horizontal compressor 100, lubricating oil may be drawn from the oil reservoir region SR through the first fluid supply pipe LP1 and via the first suction path (i.e., the first through hole H1 and the first blind groove G1), and lubricating oil may be drawn from the motor region MR through the second fluid supply pipe LP2 and via the second suction path (i.e., the second through hole H2 and the second blind groove G2).

Advantageously, the first fluid supply pipe P1 may extend directly from the first pipe connection 1865 in the oil storage region SR of the horizontal compressor to a position spaced from the bottom of the housing 110 (specifically the second end cap 113 in the configuration shown in fig. 1) in order to draw lubricating oil from the oil storage region SR. The second fluid supply pipe LP2 may extend from the second pipe connection 1866 and pass through the partition 160 up to a proper position at the bottom of the motor region MR of the horizontal compressor, so as to suck the lubricating oil accumulated in the motor region MR of the horizontal compressor into the corresponding suction chamber. For example, as shown in fig. 1, the second fluid supply line LP2 may extend first generally vertically in the oil storage region SR of the horizontal compressor to a location near the bottom of the second end cover 113, and then through the partition 160 to a suitable location in the motor region MR of the horizontal compressor 100 generally parallel to the bottom of the horizontal compressor 100.

According to the present disclosure, the compressed fluid in one of the compression chambers PC1, PC2 of the fluid pumping device 180 may be discharged into the oil storage region SR of the horizontal compressor 100 via the corresponding discharge path, while the compressed fluid in the other compression chamber will be supplied into the concentric hole 134 in the rotary shaft 130 via the corresponding discharge path. It is preferable that the lubricating oil compressed by the first compression chamber PC1 be discharged to the oil storage region SR of the horizontal compressor 100, and the lubricating oil compressed by the second compression chamber PC2 be further supplied to the concentric hole 134 of the rotary shaft 130.

Since the third pipe connection 1867 is located in the oil storage region SR of the horizontal compressor 100. The lubricating oil discharged through the third pipe connection 1867 may be directly discharged to the bottom of the oil storage region SR to be stored, and thus, there is no need to provide an additional fluid pipe connected to the third pipe connection 1867. Alternatively, the third pipe connection 1867 may not be provided, and the compressed lubricant in the first compression chamber PC1 may be discharged directly from the third through hole H3 into the oil reservoir SR. Optionally, a third fluid pipe (not shown) may also be provided at third pipe connection 1867 to better direct the compressed lubricant within first compression chamber PC1 into oil reservoir region SR.

According to the present disclosure, the lubricating oil compressed by the second compression chamber PC2 may be directly pumped into the concentric hole 134 of the rotating shaft 130 via the fourth blind groove G4 and the radial groove G5. It will be appreciated that the construction of the pump housing may be modified accordingly to suit different application requirements. For example, the fourth discharge path may have the same structure as the third discharge path in order to supply the lubricating oil compressed via the second compression chamber PC2 to the respective components.

As can be seen from the above description in conjunction with fig. 1-10C, according to the present disclosure, preferably: lubricating oil can be sucked from the oil storage region SR of the horizontal compressor 100 by the first fluid supply pipe LP1 and supplied into the first suction chamber SC1 via the first pipe connection 1865, the first through hole H1, and the first blind groove G1; it is possible to suck the lubricating oil from the motor region MR of the horizontal compressor 100 by the second fluid supply pipe LP2 and to supply the lubricating oil into the second suction chamber SC2 via the second pipe connection 1866, the second through hole H2, and the second blind groove G2. During the operation of the pump structure 184, the lubricating oil compressed by the first compression chamber PC1 may be discharged into the oil storage region SR of the horizontal compressor 100 via the third groove G3, the third through hole H3, and the third pipe connection 1867; and the lubricating oil compressed by the second compression chamber PC2 may be pumped into the concentric hole 134 of the rotating shaft 130 via the fourth blind groove G4 and the radial groove G5 and further supplied to the corresponding movable parts via the corresponding oil supply paths on the rotating shaft 130.

The structural arrangement can bring the following beneficial technical effects: after the horizontal compressor 100 is started, the lubricating oil may be first drawn from the oil storage region SR, so that dry operation of the relevant components (i.e., operation without lubricating oil) may be avoided. With the operation of the horizontal compressor, a certain amount of lubricating oil is accumulated in the motor region MR, and lubricating oil can be sucked from the motor region MR via the second fluid supply pipe LP2 and the second suction path, whereby the lubricating oil accumulated in the motor region MR can be partially supplied to the oil reservoir region SR via the first discharge path and partially supplied to the rotary shaft, whereby the lubricating oil accumulated in the motor region MR can be effectively utilized, a good circulation of the lubricating oil can be achieved, and supply of excessive lubricating oil to each of the relevant movable parts via the rotary shaft can be avoided. Moreover, the pumping of lubricant from the motor region and the reservoir region, respectively, can be achieved by a single fluid pumping device, which simplifies construction, reduces cost, and improves the ease of use of the fluid pumping device as compared to complex configurations of the prior art (e.g., a combined dual pump configuration). In particular, with the above-described configuration, even if there is a shortage of oil in the oil storage region SR at the instant of start-up of the horizontal compressor or at some (or some) moment during the operation of the horizontal compressor, the lubricating oil can be supplied to the rotation shaft through the motor region MR, so that the reliability and stability of the operation of the horizontal compressor can be improved, and the applicability of the horizontal compressor can be improved. In addition, the first compression chamber PC1 is preferably communicated to the oil storage region SR, which facilitates the gas sucked into the compression chamber from the motor region to be preferentially discharged to the oil storage region while preventing the gas from entering the rotary shaft, so that the operation stability of the fluid pumping device and the horizontal compressor can be improved.

Although various embodiments of the present disclosure have been described in detail herein, it is to be understood that the disclosure is not limited to the specific embodiments described and illustrated in detail herein, and that other modifications and variations may be effected by one skilled in the art without departing from the spirit and scope of the disclosure. For example, it is conceivable to control the opening and closing of the first discharge path by a separate valve member (e.g., by means of a solenoid valve or other structure) in order to control the discharge of the lubricating oil in the compression chamber to the oil reservoir, for example, in accordance with the rotational speed of the horizontal compressor. It is understood that all variations and modifications made on the basis of the present disclosure fall within the scope of the present disclosure. Moreover, all the components described herein may be replaced by other technically equivalent components.