阅读说明：本技术 能够测量柱塞泵柱塞扰流损失的旋转组件及测试装置 (Rotating assembly capable of measuring plunger pump plunger turbulence loss and testing device ) 是由 赵江澳 付永领 付剑 孙少博 于 2021-08-24 设计创作，主要内容包括：本发明公开了一种能够测量柱塞泵柱塞扰流损失的旋转组件及测试装置,壳体的底端侧壁开设有出油口；上端盖密封连接在壳体的顶端开口处,且中部开设有进油口；轴体与壳体的底端开口通过轴承组件密封转动连接；缸体底面中心与轴体顶端一体固定成型；缸体环绕旋转中心线等间距开设有多个贯通的柱塞腔；柱塞腔为一级阶梯孔,一级阶梯孔的顶部孔径大于底部孔径,且底部孔的内壁具有内螺纹；缸体摩擦片固定在缸体顶面,且其底面开设有配合孔；柱塞的数量与柱塞腔的数量相同；柱塞包括依次连接的螺纹段和扰流段；螺纹段与内螺纹连接；扰流段位于缸体下方或者位于一级阶梯孔的顶部孔和配合孔内部,用来实现柱塞和滑靴在流场中的扰流运动的模拟。(The invention discloses a rotating assembly and a testing device capable of measuring plunger turbulence loss of a plunger pump, wherein an oil outlet is formed in the side wall of the bottom end of a shell; the upper end cover is connected to the opening at the top end of the shell in a sealing mode, and an oil inlet is formed in the middle of the upper end cover; the shaft body is in sealed rotary connection with the bottom opening of the shell through a bearing assembly; the center of the bottom surface of the cylinder body and the top end of the shaft body are integrally and fixedly formed; the cylinder body is provided with a plurality of penetrating plunger cavities at equal intervals around the rotation center line; the plunger cavity is a first-stage stepped hole, the top aperture of the first-stage stepped hole is larger than the bottom aperture, and the inner wall of the bottom hole is provided with internal threads; the cylinder friction plate is fixed on the top surface of the cylinder, and the bottom surface of the cylinder friction plate is provided with a matching hole; the number of the plungers is the same as that of the plunger cavities; the plunger comprises a thread section and a turbulent flow section which are connected in sequence; the thread section is connected with the internal thread; the turbulence section is positioned below the cylinder body or positioned in a top hole and a matching hole of the first-stage stepped hole, and is used for simulating the turbulence motion of the plunger and the sliding shoe in a flow field.)

1. A rotating assembly capable of measuring turbulent flow loss of a plunger pump is characterized by comprising:

a cylinder body (4); the cylinder body (4) is provided with a plurality of penetrating plunger cavities (41) at equal intervals around a rotation center line; the plunger cavity (41) is a primary stepped hole, the top aperture of the primary stepped hole is larger than the bottom aperture, and the inner wall of the bottom hole is provided with an internal thread;

a cylinder friction plate (5); the cylinder friction plate (5) is fixed on the top surface of the cylinder (4), and the bottom surface of the cylinder friction plate is provided with a matching hole (51) which corresponds to the top hole of the primary stepped hole and has the same aperture;

a plunger (6); the number of the plungers (6) is the same as the number of the plunger cavities (41); the plunger (6) comprises a thread section (61) and a turbulent flow section (62) which are connected in sequence; the thread section (61) is connected with the internal thread; the turbulence section (62) is located below the cylinder body (4) or located in a top hole of the first-stage stepped hole and the matching hole (51).

2. The rotating assembly capable of measuring the turbulent flow loss of the plunger pump according to claim 1, wherein an end face, far away from the turbulent flow section (62), of the threaded section (61) is provided with a straight groove (611).

3. The rotating assembly capable of measuring the turbulence loss of the plunger pump according to claim 1, wherein the end of the turbulence section (62) connected with the threaded section (61) is a reducing structure (621) with reduced size.

4. A testing device capable of measuring the turbulence loss of a plunger pump is characterized by comprising a shell (1), an upper end cover (2), a shaft body (3) and a rotating assembly capable of measuring the turbulence loss of the plunger pump as set forth in any one of claims 1 to 3;

the shell (1) is of a cylindrical structure with an upper opening and a lower opening; an oil outlet (11) is formed in the side wall of the bottom end of the shell (1);

the upper end cover (2) is connected to the opening at the top end of the shell (1) in a sealing mode, and an oil inlet (21) is formed in the middle of the upper end cover;

the shaft body (3) is in sealed rotary connection with an opening at the bottom end of the shell (1) through a bearing assembly (7), and the bottom end of the shaft body (3) extends out of the shell (1);

the center of the bottom surface of the cylinder body (4) and the top end of the shaft body (3) are integrally and fixedly formed, and a gap is formed between the side wall of the cylinder body (4) and the inner wall of the shell (1); a gap is reserved between the top surface of the cylinder friction plate (5) and the upper end cover (2).

5. The testing device capable of measuring the plunger turbulence loss of the plunger pump according to claim 4, characterized in that the top edge of the shell (1) is provided with an upper flange (12) for connecting with the upper end cover (2), and the upper flange (12) is connected with the upper end cover (2) through screws; the bottom edge of the shell (1) is provided with a lower flange plate (13), the bottom edge of the shell (1) is provided with an annular frame (14) protruding radially towards the inner cavity of the shell, the bottom surface of the annular frame (14) is provided with a mounting cylinder (15) extending downwards, and the annular frame (14) and the mounting cylinder (15) are used for being connected with the bearing assembly (7).

6. A testing device capable of measuring plunger turbulence loss of a plunger pump according to claim 5, characterized in that the bearing assembly (7) comprises a thrust bearing (71), a bearing (72) and a bearing end cover (73); the thrust bearing (71) is sleeved on the shaft body (3) and clamped in a counter bore (141) formed in the top surface of a through hole in the middle of the annular frame (14); the inner ring of the bearing (72) is sleeved on the shaft body (3), and the outer ring is sleeved inside the mounting cylinder (15); the bearing end cover (73) is connected with the bottom end of the mounting cylinder (15) through a screw.

7. A test device capable of measuring plunger turbulence loss of a plunger pump according to claim 6, characterized in that the shaft body (3) is provided with a radial convex ring (31) abutting against the top surface of the thrust bearing (71).

8. The testing device capable of measuring the turbulence loss of the plunger pump according to claim 5, wherein an annular sealing groove (121) is formed in the top surface of the upper flange (12), and a sealing ring is arranged in the sealing groove (121) in a cushioning manner.

9. The testing device capable of measuring the turbulence loss of the plunger pump as recited in claim 5, wherein one end of the oil outlet (11) is opened on the top surface of the annular frame (14), and the other end is opened on the side wall of the lower flange (13).

10. The testing device capable of measuring the plunger turbulence loss of the plunger pump according to claim 4, characterized in that a plurality of thermocouples (8) extending into the shell (1) are installed on the top surface of the upper end cover (2), and the thermocouples (8) are located in a gap between the side wall of the cylinder (4) and the inner wall of the shell (1).

Technical Field

The invention relates to the technical field of hydraulic components, in particular to a rotating assembly capable of measuring plunger turbulence loss of a plunger pump and a testing device.

Background

Axial plunger pumps/motors are one of the most important power/actuator elements in fluid transmission and control disciplines and are widely and deeply used in various industries. Because the inside of the pump/motor housing is filled with hydraulic oil with certain viscosity, the high-speed streaming motion of the rotating member inside the housing causes power losses such as viscous friction loss and local eddy current loss, which are collectively called "streaming loss". The bypass loss has an important influence on the efficiency of the axial plunger pump/motor, especially when the pump/motor works at a high rotating speed, such as an aerospace pump, the rotating speed can reach orders of magnitude of tens of thousands of revolutions per minute, and the high speed is a main means for improving the power density of the axial plunger pump/motor, so the method has important significance on the related research of the bypass loss.

The plunger pump rotating assembly bypass flow loss mainly comprises two parts: firstly, the cylinder body and the driving shaft generate bypass flow loss; the second is the bypass loss generated by the plunger mounted on the cylinder. Technical scheme and research that provide among the prior art generally can only realize the overall measurement to above bypass loss, can't peel off each item bypass loss, this is mainly because the plunger connection structure of plunger jar decides, and the plunger can't break away from outside the cylinder body alone, perhaps leads to the foundation structure change after breaking away from, leads to can not further deepening to plunger pump rotating assembly bypass loss research, and then has improved the optimal design degree of difficulty of plunger piston shoe subassembly

Therefore, how to measure the turbulent flow loss of the plunger shoe assembly to the oil separately is a problem that needs to be solved by those skilled in the art.

Disclosure of Invention

In view of the above, the present invention provides a rotating assembly and a testing apparatus capable of measuring turbulent flow loss of a plunger pump, and aims to solve the above technical problems.

In order to achieve the purpose, the invention adopts the following technical scheme:

a rotating assembly capable of measuring plunger turbulence loss of a plunger pump, comprising:

a cylinder body; the cylinder body is provided with a plurality of penetrating plunger cavities at equal intervals around the rotation center line; the plunger cavity is a primary stepped hole, the aperture of the top of the primary stepped hole is larger than that of the bottom of the primary stepped hole, and the inner wall of the bottom hole is provided with internal threads;

a cylinder friction plate; the cylinder friction plate is fixed on the top surface of the cylinder, and the bottom surface of the cylinder friction plate is provided with a matching hole which corresponds to the top hole of the primary stepped hole and has the same aperture;

a plunger; the number of the plungers is the same as that of the plunger cavities; the plunger comprises a thread section and a turbulent flow section which are connected in sequence; the thread section is connected with the internal thread; the vortex section is located cylinder body below or be located the top hole of one-level shoulder hole with inside the mating holes.

Through the technical scheme, the cylinder body and the cylinder body friction plate are provided with the through holes for accommodating the plungers in a matched mode, so that the plungers are exposed out of the cylinder body when the cylinder body is normally installed, can be hidden inside the cylinder body and the cylinder body friction plate when the cylinder body and the cylinder body friction plate are reversely installed, can selectively participate in the bypass loss through the forward and reverse installation mode on the basis of not influencing the structure, and provides a foundation for stripping research of various bypass losses.

Preferably, in the above-mentioned rotating assembly capable of measuring plunger pump plunger vortex loss, a straight groove is opened on the end face of the threaded section far away from the vortex section. The plunger is convenient to screw.

Preferably, in the above-mentioned rotating assembly capable of measuring plunger pump plunger vortex loss, the vortex section with the one end that the screw thread section is connected is the reducing structure that the size reduces. Is convenient for manufacturing and processing.

The invention also provides a testing device capable of measuring the plunger pump plunger turbulence loss, which comprises a shell, an upper end cover, a shaft body and the rotating assembly capable of measuring the plunger pump plunger turbulence loss;

the shell is of a cylindrical structure with an upper opening and a lower opening; an oil outlet is formed in the side wall of the bottom end of the shell;

the upper end cover is connected to the opening at the top end of the shell in a sealing mode, and an oil inlet is formed in the middle of the upper end cover;

the shaft body is in sealed rotary connection with an opening at the bottom end of the shell through a bearing assembly, and the bottom end of the shaft body extends out of the shell;

the center of the bottom surface of the cylinder body and the top end of the shaft body are integrally and fixedly formed, and a gap is formed between the side wall of the cylinder body and the inner wall of the shell; a gap exists between the top surface of the cylinder friction plate and the upper end cover.

Through the technical scheme, the testing device provided by the invention has the advantages that: the plunger is detachably connected with the cylinder body through threads, two connection modes of the cylinder body and the plunger, namely an internal connection mode and an external connection mode, can be realized simply and conveniently, the plunger can be selected, the bypass resistance moment of the cylinder body and the plunger in the liquid filling shell can be peeled off, data refining is realized, and the bypass resistance moment of the cylinder body and the plunger can be accurately measured under the condition that the rotary structure rotary inertia is unchanged.

Preferably, in the testing device capable of measuring the turbulent flow loss of the plunger pump, the top edge of the shell is provided with an upper flange plate used for being connected with the upper end cover, and the upper flange plate is connected with the upper end cover through a screw; the casing bottom edge is provided with a lower flange disc, the casing bottom edge is provided with an annular frame protruding towards the radial direction of an inner cavity of the casing bottom edge, the bottom surface of the annular frame is provided with a mounting cylinder extending downwards, and the annular frame and the mounting cylinder are used for being connected with the bearing assembly. The connecting and mounting of the corresponding parts of the shell are facilitated.

Preferably, in the testing device capable of measuring plunger turbulence loss of the plunger pump, the bearing assembly comprises a thrust bearing, a bearing and a bearing end cover; the thrust bearing is sleeved on the shaft body and clamped in a counter bore formed in the top surface of the through hole in the middle of the annular frame; the bearing inner ring is sleeved on the shaft body, and the outer ring is sleeved inside the mounting cylinder; the bearing end cover is connected with the bottom end of the mounting cylinder through a screw. The requirement of the rotational stability of the shaft body can be met.

Preferably, in the above-described testing apparatus capable of measuring a turbulent flow loss of the plunger pump, the shaft body has a radial projecting ring abutting against the top surface of the thrust bearing. Can satisfy the installation demand.

Preferably, in the above-mentioned testing arrangement that can measure plunger pump plunger vortex loss, annular seal groove has been seted up to the upper flange dish top surface, the gasket is equipped with the sealing washer in the seal groove. The sealing performance can be improved.

Preferably, in the testing device capable of measuring the turbulent flow loss of the plunger pump, one end of the oil outlet is formed in the top surface of the annular frame, and the other end of the oil outlet is formed in the side wall of the lower flange. The structure layout is reasonable.

Preferably, in the testing device capable of measuring the turbulent flow loss of the plunger pump, the top surface of the upper end cover is provided with a plurality of thermocouples extending into the shell, and the thermocouples are located in the gap between the side wall of the cylinder body and the inner wall of the shell. For obtaining a value of the temperature change around the flow field.

Compared with the prior art, the invention discloses a rotating assembly and a testing device capable of measuring the turbulent flow loss of a plunger pump, and the rotating assembly and the testing device have the following beneficial effects:

1. the cylinder body and the cylinder body friction plate are provided with the through holes for accommodating the plungers in a matched mode, so that the plungers are exposed out of the cylinder body when the cylinder body and the cylinder body friction plate are normally installed, the plungers can be hidden in the cylinder body and the cylinder body friction plate when the cylinder body and the cylinder body friction plate are reversely installed, the plungers can selectively participate in the bypass loss through the normal and reverse installation mode on the basis of not influencing the structure, and a foundation is provided for stripping research of various bypass losses.

2. The testing device provided by the invention has the advantages that: the plunger is detachably connected with the cylinder body through threads, two connection modes of the cylinder body and the plunger, namely an internal connection mode and an external connection mode, can be realized simply and conveniently, the plunger can be selected, the bypass resistance moment of the cylinder body and the plunger in the liquid filling shell can be peeled off, data refining is realized, and the bypass resistance moment of the cylinder body and the plunger can be accurately measured under the condition that the rotary structure rotary inertia is unchanged.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a rotating assembly capable of measuring turbulent flow loss of a plunger pump provided by the invention;

FIG. 2 is a schematic structural diagram of a cylinder and a shaft according to the present invention;

FIG. 3 is a schematic view of a plunger according to the present invention;

FIG. 4 is a cross-sectional view of the plunger in an outboard position according to the present invention;

FIG. 5 is a sectional view of the plunger according to the present invention in a built-in state;

FIG. 6 is a schematic diagram of an external structure of a testing device according to the present invention;

FIG. 7 is a sectional view of a test apparatus according to the present invention;

FIG. 8 is a schematic view of a housing construction provided by the present invention;

FIG. 9 is a schematic view of a bearing end cap structure provided by the present invention.

Wherein:

1-a shell;

11-an oil outlet; 12-an upper flange plate; 121-seal groove; 13-lower flange; 14-an annular frame; 141-counterbores; 15-mounting the cylinder;

2-upper end cover;

21-an oil inlet;

3-a shaft body;

31-a radial convex ring;

4-cylinder body;

41-plunger cavity;

5-cylinder friction plate;

51-a mating hole;

6-plunger piston;

61-a thread segment; 611-straight slot; 62-a burbling section; 621-reducing structure;

7-a bearing assembly;

71-a thrust bearing; 72-a bearing; 73-bearing end cap;

8-thermocouple.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

referring to fig. 1 to 5, an embodiment of the present invention discloses a rotating assembly capable of measuring turbulent flow loss of a plunger pump, including:

a cylinder body 4; the cylinder body 4 is provided with a plurality of penetrating plunger cavities 41 at equal intervals around the rotation center line; the plunger cavity 41 is a first-stage stepped hole, the top aperture of the first-stage stepped hole is larger than the bottom aperture, and the inner wall of the bottom hole is provided with internal threads;

a cylinder friction plate 5; the cylinder friction plate 5 is fixed on the top surface of the cylinder 4, and the bottom surface of the cylinder friction plate is provided with a matching hole 51 which corresponds to the top hole of the first-stage stepped hole and has the same aperture;

a plunger 6; the number of plungers 6 is the same as the number of plunger chambers 41; the plunger 6 comprises a threaded section 61 and a turbulent section 62 which are connected in sequence; the thread section 61 is connected with the internal thread; the spoiler 62 is located externally below the cylinder 4.

In order to further optimize the above technical solution, a straight groove 611 is formed in an end surface of the threaded section 61 away from the spoiler section 62.

In order to further optimize the above technical solution, the end of the spoiler section 62 connected to the threaded section 61 is a reducing structure 621 with a reduced size.

Example 2:

the present embodiment is different from embodiment 1 in that: the threaded section 61 of the plunger 6 is connected with the internal thread; the spoiler section 62 is located inside the top hole of the primary stepped hole and the mating hole 51.

Example 3:

referring to fig. 6 to 9, the embodiment of the invention discloses a testing device capable of measuring the turbulent flow loss of a plunger pump, which comprises a shell 1, an upper end cover 2, a shaft body 3 and a rotating assembly capable of measuring the turbulent flow loss of the plunger pump in the embodiment 1 or 2;

the shell 1 is a cylindrical structure with an upper opening and a lower opening; an oil outlet 11 is formed in the side wall of the bottom end of the shell 1;

the upper end cover 2 is hermetically connected to an opening at the top end of the shell 1, and an oil inlet 21 is formed in the middle of the upper end cover;

the shaft body 3 is in sealed rotary connection with an opening at the bottom end of the shell 1 through a bearing assembly 7, and the bottom end of the shaft body 3 extends out of the shell 1;

the center of the bottom surface of the cylinder body 4 and the top end of the shaft body 3 are integrally and fixedly formed, and a gap is formed between the side wall of the cylinder body 4 and the inner wall of the shell 1; a gap exists between the top surface of the cylinder friction plate 5 and the upper end cover 2.

In order to further optimize the technical scheme, the top edge of the shell 1 is provided with an upper flange 12 used for being connected with the upper end cover 2, and the upper flange 12 is connected with the upper end cover 2 through screws; the bottom edge of the shell 1 is provided with a lower flange 13, the bottom edge of the shell 1 is provided with an annular frame 14 protruding radially towards the inner cavity of the shell, the bottom surface of the annular frame 14 is provided with a mounting cylinder 15 extending downwards, and the annular frame 14 and the mounting cylinder 15 are used for being connected with the bearing assembly 7.

In order to further optimize the above technical solution, the bearing assembly 7 comprises a thrust bearing 71, a bearing 72 and a bearing end cover 73; the thrust bearing 71 is sleeved on the shaft body 3 and clamped in a counter bore 141 formed in the top surface of the through hole in the middle of the annular frame 14; the inner ring of the bearing 72 is sleeved on the shaft body 3, and the outer ring is sleeved inside the mounting cylinder 15; the bearing end cover 73 is connected with the bottom end of the mounting cylinder 15 through screws.

In order to further optimize the above technical means, the shaft body 3 has a radial projecting ring 31 abutting on the top surface of the thrust bearing 71.

In order to further optimize the technical scheme, an annular sealing groove 121 is formed in the top surface of the upper flange 12, and a sealing ring is arranged in the sealing groove 121 in a cushioning mode.

In order to further optimize the technical scheme, one end of the oil outlet 11 is arranged on the top surface of the annular frame 14, and the other end of the oil outlet is arranged on the side wall of the lower flange 13.

In order to further optimize the technical scheme, a plurality of thermocouples 8 extending into the shell 1 are arranged on the top surface of the upper end cover 2, and the thermocouples 8 are positioned in a gap between the side wall of the cylinder body 4 and the inner wall of the shell 1.

The method for simulating and measuring the flow bypassing loss of the testing device capable of measuring the flow bypassing loss of the plunger pump provided by the embodiment comprises the following steps of:

s1, connecting the extending end of the shaft body 3 with a torque sensor, and connecting the torque sensor with a driving motor;

s2, discharging oil in the shell 1, separating the shaft body 3, the cylinder body 4 and the plunger 6 in the shell 1 from the oil, starting the driving motor, and measuring the friction moment M in the no-load state through the torque sensor₀；

S3, the plunger 6 is arranged in the cylinder 4, the oil is filled in the shell 1, the driving motor is started, the shaft 3 and the cylinder 4 participate in the bypass flow movement, and the bypass flow resistance moment M is measured through the torque sensor₁；

S4, exposing the plunger 6 out of the cylinder body 4, filling oil into the shell 1, starting the driving motor, enabling the shaft body 3, the cylinder body 4 and the plunger 6 to participate in the bypass flow movement, and measuring bypass flow resistance moment M through the torque sensor₂；

S5, the flow-around resistance moment M of the shaft body 3 and the cylinder 4 in the liquid-filled housing 1_c＝M₁-M₀(ii) a The circumferential flow resistance M of the plunger 6 in the liquid-filled housing 1_p＝M₂-M₁。

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.