阅读说明：本技术 一种供油装置及包含其的涡旋压缩机 (Oil supply device and scroll compressor comprising same ) 是由 曲成林 徐嘉 刘雷 毕远航 马英超 余世顺 于 2020-12-03 设计创作，主要内容包括：本发明提供了一种润滑油供油装置及包含其的涡旋压缩机,涉及压缩机技术领域,解决了压缩机在低频启动时,处于少油或干磨状态,影响使用寿命的技术问题。该润滑油供油装置包括送油组件；驱动组件,通过第一传动件与送油组件传动连接；第二传动件,与待润滑设备连接；同步调节组件,设置在第一传动件和第二传动件之间,能控制第一传动件和第二传动件的连接或分离,以实现送油组件和待润滑设备的同步运转或独立运转；涡旋压缩机包括上述的润滑油供油装置。本发明采用分体式曲轴设计,通过同步调节组件,在低频启动时,油泵转动、泵体静止,待泵体内供油充分后,油泵及泵体正常联动运转,减少泵体缺油或干磨的风险,增加整体的可靠性。(The invention provides a lubricating oil supply device and a scroll compressor comprising the same, relates to the technical field of compressors, and solves the technical problem that the service life of the compressor is influenced when the compressor is started at low frequency and is in a less oil or dry grinding state. The lubricating oil supply device comprises an oil supply assembly; the driving component is in transmission connection with the oil feeding component through a first transmission component; the second transmission part is connected with the equipment to be lubricated; the synchronous adjusting assembly is arranged between the first transmission piece and the second transmission piece and can control the connection or the separation of the first transmission piece and the second transmission piece so as to realize the synchronous operation or the independent operation of the oil delivery assembly and the equipment to be lubricated; the scroll compressor comprises the lubricating oil supply device. The invention adopts a split crankshaft design, and through the synchronous adjusting assembly, when the low-frequency starting is carried out, the oil pump rotates, the pump body is static, and after the oil supply in the pump body is sufficient, the oil pump and the pump body normally run in a linkage manner, so that the risk of oil shortage or dry grinding of the pump body is reduced, and the overall reliability is increased.)

1. A lubricating oil supply device is characterized by comprising

The oil delivery component is used for delivering lubricating oil to equipment to be lubricated;

the driving component is in transmission connection with the oil feeding component through a first transmission component and can drive the oil feeding component to operate;

the second transmission part is connected with the equipment to be lubricated and can drive the equipment to be lubricated to run under the action of an external power source;

and the synchronous adjusting assembly is arranged between the first transmission piece and the second transmission piece and can control the connection or the separation of the first transmission piece and the second transmission piece so as to realize synchronous operation or independent operation of the oil conveying assembly and the equipment to be lubricated.

2. The lubricating oil supply device according to claim 1, wherein when the first transmission member rotates forward or backward, the synchronous adjusting assembly is in a synchronous state, so that the transmission connection between the first transmission member and the second transmission member can be realized; when the first transmission piece rotates reversely or forwardly, the synchronous adjusting assembly is in a separation state, and the first transmission piece and the second transmission piece can be separated from each other.

3. The lubricant oil supply unit of claim 2, wherein the synchronization adjustment assembly comprises an inner ratchet wheel and an outer ratchet wheel, the inner ratchet wheel being rotatably disposed on the first transmission member, the outer ratchet wheel being disposed on the second transmission member, and further comprising a first limit structure and a second limit structure disposed on the first transmission member and the outer ratchet wheel for limiting and positioning the inner ratchet wheel; when the synchronous adjusting assembly is in a synchronous state, the inner ratchet wheel is in limit connection with the outer ratchet wheel through the second limit structure; when the synchronous adjusting assembly is in a separation state, the inner ratchet wheel is in limit connection with the first transmission piece through the first limiting structure.

4. The lubricating oil supply device of claim 3, wherein the inner ratchet wheel is provided with crescent-shaped ratchet teeth which extend outwards, and the first limiting structure comprises a ratchet wheel base for bearing the inner ratchet wheel and a limiting boss which is arranged on the ratchet wheel base and can be abutted against the ratchet teeth; the outer ratchet wheel is of an annular structure and is sleeved outside the ratchet wheel base; the second limiting structure is a limiting step which is arranged on the inner ring of the outer ratchet wheel and can be abutted against the ratchet.

5. The lubricant oil supply unit of claim 3, wherein the inner ratchet wheel is provided with crescent-shaped ratchets extending outwards, and the first limiting structure comprises stop pins arranged at two opposite sides of the inner ratchet wheel; the outer ratchet wheel is of an annular structure and is sleeved outside the inner ratchet wheel; the second limiting structure is a limiting step which is arranged on the inner ring of the outer ratchet wheel and can be abutted against the ratchet.

6. The lubricating oil supply device of claim 3, wherein the inner ratchet wheel is provided with crescent-shaped ratchets which extend outwards, the first limiting structure comprises a shaft key arranged at the side of the rotating shaft of the inner ratchet wheel, and a limiting stop window is arranged at the corresponding position of the inner ratchet wheel; the outer ratchet wheel is of an annular structure and is sleeved outside the inner ratchet wheel; the second limiting structure is a limiting step which is arranged on the inner ring of the outer ratchet wheel and can be abutted against the ratchet.

7. The lubricant oil supply device according to any one of claims 3 to 6, further comprising end face bearings provided at a top of the first transmission member and a bottom of the second transmission member.

8. The lubricant oil supplying device according to any one of claims 3 to 6, wherein an eccentric portion is further provided between the outer ratchet and the second transmission member.

9. The lubricant supplying apparatus according to claim 3 or 4, wherein the lubricant supplying member includes an internal gear pump, a lubricant supply passage provided axially along the first transmission member and the second transmission member, and a first through hole and a second through hole provided in the ratchet base and the internal ratchet gear to communicate with the lubricant supply passage, respectively; the second through hole is a waist-shaped hole.

10. The lubricant oil supply unit of claim 1, wherein the first transmission member is a lower crankshaft; the second transmission part is an upper crankshaft which is arranged concentrically with the lower crankshaft.

11. A scroll compressor comprising a lubricating oil supply unit according to any one of claims 1 to 10.

Technical Field

The invention relates to the technical field of compressors, in particular to a lubricating oil supply device and a scroll compressor comprising the same.

Background

The high-pressure cavity vortex compressor realizes gas compression by volume reduction caused by relative motion of the pump body, a plurality of friction pairs exist in the operation process, most of the lubrication modes are oil film lubrication, particularly the pump body part needs continuous oil supply lubrication in the operation process, and the service life of the compressor is ensured.

Generally, an oil pump is adopted for supplying oil to a high-pressure cavity scroll compressor, oil in an oil pool at the bottom is guided to a pump body part, the oil pump and a compressor pump body are of a coaxial structure, a main shaft simultaneously drives the compressor pump body and the oil pump to rotate when rotating, and the rotating speed of the compressor is the same as that of the oil pump, so that the oil output of the oil pump is positively correlated with the rotating speed of the compressor; however, because the pump body part of the compressor is usually arranged at the upper position of the compressor, when the compressor is started at low frequency, the oil pump has less oil output, and because of longer pumping distance, lubricating oil can be supplied to the upper pump body of the compressor for a longer time; in this period, the pump body of the compressor is in a low-oil running state or even a dry grinding state, and the service life of the compressor is seriously influenced.

Disclosure of Invention

The invention aims to provide an oil supply device and a scroll compressor comprising the same, and aims to solve the technical problem that the service life of the compressor in the prior art is influenced because the compressor is in a less oil or dry grinding state when the compressor is started at a low frequency.

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

the invention provides a lubricating oil supply device, which comprises

The oil delivery component is used for delivering lubricating oil to equipment to be lubricated;

the driving component is in transmission connection with the oil feeding component through a first transmission component and can drive the oil feeding component to operate;

the second transmission part is connected with the equipment to be lubricated and can drive the equipment to be lubricated to run under the action of an external power source;

and the synchronous adjusting assembly is arranged between the first transmission piece and the second transmission piece and can control the connection or the separation of the first transmission piece and the second transmission piece so as to realize synchronous operation or independent operation of the oil conveying assembly and the equipment to be lubricated.

As a further improvement of the invention, when the first transmission member rotates forwards or backwards, the synchronous adjusting assembly is in a synchronous state, so that the transmission connection between the first transmission member and the second transmission member can be realized; when the first transmission piece rotates reversely or forwardly, the synchronous adjusting assembly is in a separation state, and the first transmission piece and the second transmission piece can be separated from each other.

As a further improvement of the present invention, the synchronous adjustment assembly includes an inner ratchet wheel and an outer ratchet wheel, the inner ratchet wheel is rotatably disposed on the first transmission member, the outer ratchet wheel is disposed on the second transmission member, and the synchronous adjustment assembly further includes a first limit structure and a second limit structure disposed on the first transmission member and the outer ratchet wheel for limiting and positioning the inner ratchet wheel; when the synchronous adjusting assembly is in a synchronous state, the inner ratchet wheel is in limit connection with the outer ratchet wheel through the second limit structure; when the synchronous adjusting assembly is in a separation state, the inner ratchet wheel is in limit connection with the first transmission piece through the first limiting structure.

As a further improvement of the invention, the inner ratchet wheel is provided with crescent-shaped ratchets which extend outwards, and the first limiting structure comprises a ratchet wheel base for bearing the inner ratchet wheel and a limiting boss which is arranged on the ratchet wheel base and can be abutted against the ratchets; the outer ratchet wheel is of an annular structure and is sleeved outside the ratchet wheel base; the second limiting structure is a limiting step which is arranged on the inner ring of the outer ratchet wheel and can be abutted against the ratchet.

As a further improvement of the invention, the inner ratchet wheel is provided with crescent-shaped ratchets which extend outwards, and the first limiting structure comprises stop pins arranged at two opposite sides of the inner ratchet wheel; the outer ratchet wheel is of an annular structure and is sleeved outside the inner ratchet wheel; the second limiting structure is a limiting step which is arranged on the inner ring of the outer ratchet wheel and can be abutted against the ratchet.

As a further improvement of the invention, the inner ratchet wheel is provided with crescent-shaped ratchets which extend outwards, the first limiting structure comprises a shaft key arranged at the side of the rotating shaft of the inner ratchet wheel, and a limiting stop window is arranged at the corresponding position of the inner ratchet wheel; the outer ratchet wheel is of an annular structure and is sleeved outside the inner ratchet wheel; the second limiting structure is a limiting step which is arranged on the inner ring of the outer ratchet wheel and can be abutted against the ratchet.

As a further improvement of the invention, the transmission mechanism further comprises end face bearings arranged at the top of the first transmission piece and the bottom of the second transmission piece.

As a further improvement of the invention, an eccentric part is also arranged between the outer ratchet wheel and the second transmission piece.

As a further improvement of the present invention, the oil delivery assembly includes an internal gear pump, an oil delivery channel axially disposed along the first transmission member and the second transmission member, and a first through hole and a second through hole respectively disposed on the ratchet wheel base and the internal ratchet wheel and communicated with the oil delivery channel; the second through hole is a waist-shaped hole.

As a further improvement of the present invention, the first transmission member is a lower crankshaft; the second transmission part is an upper crankshaft which is arranged concentrically with the lower crankshaft.

The invention provides a scroll compressor, which comprises the lubricating oil supply device.

Compared with the prior art, the invention has the following beneficial effects:

the invention provides a lubricating oil supply device, which adopts a split crankshaft structure for a crankshaft, can isolate the rotation of an oil pump from the rotation of a compressor pump body by arranging a synchronous adjusting component, wherein a main shaft rotates reversely (clockwise) when the low-frequency starting is performed, the oil pump and the compressor pump body are separated from each other by the synchronous adjusting component at the moment, the oil pump moves but the compressor pump body is static, the oil pump supplies refrigeration oil to the pump body, the main shaft stops after the oil supply is sufficient, the reversing is performed, the forward (anticlockwise) rotation is performed, the oil pump is linked with the compressor pump body by the synchronous adjusting component, the oil pump and the pump body normally operate, and the compressor normally operates, so that the oil shortage or dry grinding of the compressor when the low-frequency starting is effectively avoided, and the

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 some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a cross-sectional view of the scroll compressor of the present invention;

FIG. 2 is a partial cross-sectional view of a split portion of the crankshaft of the scroll compressor of the present invention;

FIG. 3 is an exploded view of the crankshaft of the scroll compressor of the present invention;

FIG. 4 is an exploded view of the crankshaft of the scroll compressor of the present invention;

FIG. 5 is a schematic view of the forward rotation of the synchronous adjustment assembly of the first embodiment of the scroll compressor of the present invention;

FIG. 6 is a schematic view of the synchronous adjustment assembly in a reverse rotation of the first embodiment of the scroll compressor of the present invention;

FIG. 7 is a schematic view of the forward rotation of the synchronous adjustment assembly of the second embodiment of the scroll compressor of the present invention;

FIG. 8 is a schematic view of the synchronous adjustment assembly in a reverse rotation of the second embodiment of the scroll compressor of the present invention;

FIG. 9 is a schematic view of the forward rotation of the synchronous adjustment assembly of the third embodiment of the scroll compressor of the present invention;

FIG. 10 is a schematic view of the synchronous adjustment assembly in a reverse rotation of the third embodiment of the scroll compressor of the present invention;

FIG. 11 is an enlarged view of portion A of FIG. 9;

FIG. 12 is a diagram of scroll compressor start-up control logic in accordance with the present invention.

In figure 1, a lower cover; 2. a gasket; 3. an internal gear pump; 4. a lower bracket; 5. a support ring; 6. a motor; 7. an upper bracket; 8. an air inlet pipe; 9. a fixed scroll; 10. a movable scroll; 11. a cross slip ring; 12. a counterbalance; 13. a crankshaft; 13-1, an upper crankshaft; 13-2, a lower crankshaft; 14. a ratchet wheel base; 15. an inner ratchet wheel; 16. an end face bearing; 17. an eccentric portion; 18. an outer ratchet wheel; 19. a stop pin; 20. a shaft key; 21. and limiting the stop window.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

As shown in FIGS. 1 and 2, the present invention provides a lubricating oil supply apparatus including

The oil delivery component is used for delivering lubricating oil to equipment to be lubricated; the following description will be made specifically by taking the device to be lubricated as a compressor pump body as an example; the oil delivery equipment pumps the lubricating oil in an oil pool at the bottom of the compressor to a compressor pump body at the upper part;

the driving component is in transmission connection with the oil conveying component through a first transmission component and can drive the oil conveying component to operate; it should be noted that the driving assembly is a motor, and is connected to the first transmission member, and when the motor operates, the motor can drive the first transmission member to operate along with the first transmission member, and the oil delivery assembly is in transmission connection with the first transmission member, so that the oil delivery assembly operates, and can deliver oil to lubricating oil;

the second transmission part is connected with the equipment to be lubricated and can drive the equipment to be lubricated to run under the action of an external power source; specifically, the second transmission piece extends to the upper part of the compressor and is connected with the pump body of the compressor;

the synchronous adjusting assembly is arranged between the first transmission piece and the second transmission piece and can control the connection or the separation of the first transmission piece and the second transmission piece so as to realize the synchronous operation or the independent operation of the oil delivery assembly and the equipment to be lubricated.

It should be noted that, in the present invention, the first transmission element and the second transmission element are separate structures of the crankshaft 13, that is, one crankshaft is divided into an upper section and a lower section, the lower section is the first transmission element, that is, the lower crankshaft 13-2, and the upper section is the second transmission element, that is, the upper crankshaft 13-1; the upper crankshaft and the lower crankshaft are arranged concentrically;

when the motor drives the first transmission piece to rotate forwards or backwards (anticlockwise or clockwise), the synchronous adjusting assembly is in a synchronous state, and transmission connection of the first transmission piece and the second transmission piece can be realized, namely the lower crankshaft 13-2 and the upper crankshaft 13-1 are connected together at the moment and can be driven by the motor to rotate at the same time, and the operation state of the common scroll compressor is realized; in the present invention, the forward rotation is counterclockwise rotation as shown in fig. 5, 7 and 9, and the reverse rotation is clockwise rotation as shown in fig. 6, 8 and 10; when the first transmission piece rotates reversely or forwardly, namely rotates in the direction opposite to the synchronous rotation state of the front, the synchronous adjusting assembly is in a separation state, and the first transmission piece and the second transmission piece can be separated from each other. When the upper and lower crankshafts are separated from each other, the crankshafts at the lower part are driven by the motor to rotate, so that the operation of the oil pump can be realized, and the compressor pump body connected with the crankshafts at the upper part is kept static and cannot rotate together with the crankshaft, so that the problem that when the compressor is started at a low frequency, the compressor pump body operates together with the crankshaft due to dry grinding or oil shortage when lubricating oil does not enter the compressor pump body is solved.

As shown in fig. 3 and 4, as an alternative embodiment of the present invention, the synchronous adjustment assembly includes an inner ratchet 15 and an outer ratchet 18, the inner ratchet 15 is rotatably disposed on the lower crankshaft 13-2, the outer ratchet 18 is disposed on the upper crankshaft 13-1, and a first limit structure and a second limit structure disposed on the lower crankshaft 13-2 and the outer ratchet 18 for limiting and positioning the inner ratchet 15; when the synchronous adjusting component is in a synchronous state, the inner ratchet 15 and the outer ratchet 18 are in limit connection through a second limit structure; when the synchronous adjusting component is in a separated state, the inner ratchet 15 is in limit connection with the lower crankshaft 13-2 through the first limit structure. It should be noted that, a rotating shaft is arranged on the top of the lower crankshaft 13-2, the inner ratchet 15 is sleeved on the rotating shaft and can rotate relative to the rotating shaft, as shown in fig. 5, when the lower crankshaft 13-2 rotates counterclockwise, the inner ratchet 15 has a tendency of moving in an opposite direction, and is driven to rotate by the lower crankshaft 13-2 so as to be thrown outwards under the action of inertia force, and after being thrown outwards, the inner ratchet 15 can rotate in the same direction with the lower crankshaft 13-2 under the drive of the lower crankshaft 13-2, and because the inner ratchet 15 is abutted against the second limiting structure when being thrown out, the connection between the inner ratchet 15 and the outer ratchet 18 and the positioning and limiting of the rotating angle are realized through the second limiting structure, so that the inner ratchet 15 is prevented from rotating relative to the outer ratchet 18 and the rotating angle is too large, and the upper and lower crankshafts are connected together through the second limiting structure to realize power transmission, the oil pump and the compressor pump body synchronously rotate, and the upper crankshaft and the lower crankshaft can be stably connected together and cannot be separated; as shown in fig. 6, when the lower crankshaft 13-2 rotates clockwise, the inner ratchet 15 tends to move in the opposite direction, and is driven by the lower crankshaft 13-2 to rotate, so that the inner ratchet is thrown inward under the action of inertia force, and after being thrown inward, the inner ratchet is driven by the lower crankshaft 13-2 to rotate in the same direction along with the lower crankshaft 13-2, and because the inner ratchet is pushed against the first limiting structure when being thrown inward, the connection between the inner ratchet 15 and the lower crankshaft 13-2 and the positioning and limiting of the inner ratchet 15 are realized by the first limiting structure.

As shown in fig. 5 and 6, as an alternative embodiment of the present invention, a crescent-shaped ratchet extending outwards is provided on the inner ratchet 15, and the first limit structure includes a ratchet base 14 for carrying the inner ratchet 15 and a limit boss provided on the ratchet base 14 and capable of abutting against the ratchet; furthermore, a boss with a shape matched with that of the inner ratchet wheel 15 is arranged on the ratchet wheel base 14, a rotating shaft sleeved with the inner ratchet wheel 15 penetrates through the ratchet wheel base 14, the rotating shaft is located at the eccentric position of the ratchet wheel base 14, a limiting boss matched with the crescent ratchet wheel in shape is arranged on one side of the boss opposite to the rotating shaft, and when the inner ratchet wheel 15 is thrown outwards under the action of inertia force, the bent arc structures of the ratchet wheel and the body part of the inner ratchet wheel 15 are just clamped at the limiting boss; the outer ratchet wheel 18 is of an annular structure and is sleeved outside the ratchet wheel base 14; the second limit structure is a limit step which is arranged on the inner ring of the outer ratchet wheel 18 and can be abutted against the ratchet. When the inner ratchet wheel 15 is thrown inwards under the action of inertia force, the tail end of the ratchet just abuts against the limiting step.

As shown in fig. 7 and 8, as another alternative embodiment of the present invention, a crescent-shaped ratchet extending outwards is provided on the inner ratchet 15, and the first limiting structure comprises stop pins 19 provided on two opposite sides of the inner ratchet 15; the positions of the two stop pins 19 are obtained by calculation according to the specification and the shape of the inner ratchet 15, and the positions of the two stop pins 19 are required to ensure that the inner ratchet 15 can be connected with the lower crankshaft 13-2 and the rotation angle is limited by the stop pins 19 when the inner ratchet 15 is thrown inwards, so that the rotation angle of the inner ratchet 15 is prevented from being too large; the outer ratchet wheel 18 is of an annular structure and is sleeved outside the inner ratchet wheel 15; the second limit structure is a limit step which is arranged on the inner ring of the outer ratchet wheel 18 and can be abutted against the ratchet.

As shown in fig. 9-11, as a third alternative embodiment of the present invention, a crescent-shaped ratchet extending outward is disposed on the inner ratchet 15, the first limiting structure includes a shaft key 20 disposed beside the rotating shaft of the inner ratchet 15, the shaft key 20 may be disposed integrally with the rotating shaft or may be disposed independently, and a limiting window 21 is disposed at a position corresponding to the inner ratchet 15; the limiting stop window 21 is a waist-shaped hole or a curved hole, when the inner ratchet wheel 15 rotates around the rotating shaft of the inner ratchet wheel, the shaft key 20 can move along the limiting stop window 21, and the limiting position of the left-right swinging of the inner ratchet wheel 15 is positioned and limited through two ends of the limiting stop window 21; the outer ratchet wheel 18 is of an annular structure and is sleeved outside the inner ratchet wheel 15; the second limit structure is a limit step which is arranged on the inner ring of the outer ratchet wheel 18 and can be abutted against the ratchet.

Specifically, in various embodiments of the present invention, ratchet base 14 is a circular structure; the inner ratchet wheel 15 comprises a circular base, a semicircular convex part formed by extending outwards along the base and crescent-shaped ratchets formed by extending outwards along the base, the ratchets and the convex part are arranged in a close proximity mode and are located on the semicircular part on one side of the base, the rotating shaft is located on the base, and the second through hole is located on the convex part.

And also includes end bearings 16 disposed at the top of the lower crankshaft 13-2 and at the bottom of the upper crankshaft 13-1.

An eccentric portion 17 is also provided between the outer ratchet 18 and the upper crankshaft 13-1.

The oil delivery component comprises an internal gear pump 3, an oil delivery channel arranged along the axial direction of the upper crankshaft 13-1 and the lower crankshaft 1-2, and a first through hole and a second through hole which are arranged on the ratchet wheel base 14 and the inner ratchet wheel 15 and are respectively communicated with the oil delivery channel; the second through hole is a waist-shaped hole, and is arranged to be a waist-shaped hole so as to ensure that the whole oil delivery channel can be always kept smooth in the rotation process of the inner ratchet wheel 15 and the continuous delivery of lubricating oil can be ensured. The oil pump is crescent gear pump 3, realizes all normal fuel feeding of corotation reversal through control oil feed hole position and size. The internal gear pump 3 is a prior art product.

The invention provides a scroll compressor, which comprises the lubricating oil supply device.

As shown in fig. 1 and 2, further, the scroll compressor comprises a housing and a lower cover 1 arranged at the bottom of the housing, a lower bracket 4 is fixed at the bottom of the housing through a support ring 5, a lower crankshaft 13-2 is rotatably arranged on the lower bracket 4 through a bearing, an internal gear pump 3 is connected with the lower end of the lower crankshaft 13-2, an oil pool is enclosed among the lower bracket 4, the support ring 5, the lower cover 1 and the housing, and the internal gear pump 3 is located in the oil pool; the bottom of the lower cover 1 is provided with a gasket 2. The motor 6 is fixed in the middle of the shell and is in transmission connection with the lower crankshaft 13-2, the balance block 12 is eccentrically arranged on the lower crankshaft 13-2, the upper end of the lower crankshaft 13-2 is fixed at the top of the shell through the upper bracket 7, and the lower crankshaft 13-2 is in rotary connection with the upper bracket 7 through a bearing; the fixed scroll 9 is fixed on the top of the shell and is connected with the upper bracket 7; the movable scroll 10 is connected to the top of the upper crankshaft 13-1 and is positioned inside the fixed scroll 9; a cross slip ring 11 is arranged between the movable scroll 10 and the upper bracket 7; an air inlet pipe 8 is arranged at an air inlet of the fixed scroll 9.

The invention adopts a split crankshaft design, can isolate the operation of an oil pump from the operation of a pump body, and can reduce the risk of oil shortage or dry grinding of the pump body and increase the overall reliability by the forward and reverse rotation logic of the crankshaft, the crankshaft rotates reversely when the crankshaft is started at low frequency, the oil pump supplies oil when rotating, the pump body is static, and the crankshaft rotates forward after the oil is sufficiently supplied in the pump body.

The specific control logic of the scroll compressor is as follows: as shown in fig. 12, when the compressor starts, the controller makes the compressor reversely rotate, that is, the control motor 6 reversely rotates, at this time, the lower crankshaft 13-2 normally runs at a low frequency, the upper crankshaft 13-1 does not rotate through a split structure, at this time, the internal gear pump 3 can normally work to pump oil upwards, the oil at the bottom of the oil pool is supplied to the pump body, and the pump body of the compressor does not generate relative motion in the process; after a period of time, after oil has sufficiently entered the pump body area of the compressor, the compressor is stopped and rotates in the forward direction, the upper crankshaft 13-1 and the lower crankshaft 13-2 are driven by the motor 6 to operate together, the compressor pump body operates together while supplying oil normally, the pump body is in a state of sufficiently soaking the frozen oil, and at the moment, the operation does not have a state of less oil or dry grinding, so that the service life and the reliability of the compressor are greatly improved; due to the adoption of the internal gear pump, the oil pump can supply oil upwards in both positive and negative rotation by controlling the positions of the inlet and the outlet.

Example 1:

the conventional crankshaft 13 of the scroll compressor is an integral type, drive the crankshaft 13 when the electrical machinery 6 runs, the crankshaft 13 drives the crescent gear pump 3 and moves the scroll plate 10 to move, in order to realize the above-mentioned control logic, the invention designs a split type crankshaft 13, can separate drive the crescent gear pump 3 from driving the movable scroll plate 10, the structure to realize this function is made up of ratchet base 14, internal ratchet 15, end face bearing 16, external ratchet 18 and eccentric portion 17, wherein ratchet base 14 and lower crankshaft 13-2 are integrative, external ratchet 18 and eccentric portion 17 are integrative, explain the characteristic of each part now:

ratchet base 14: the inner ratchet wheel 15 is used for limiting the rotating range of the inner ratchet wheel to enable the inner ratchet wheel to take effect;

the inner ratchet wheel 15: the matching or the releasing with the outer ratchet wheel 18 is realized through the centrifugal force action and the special structure, thereby realizing the combination or the separation of the movements in different rotating directions

End face bearing 16: bearing the relative motion and thrust action of the lower crankshaft 13-2 during reverse rotation;

outer ratchet 18: is integrated with the eccentric portion 17 of the upper crankshaft 13-1, and is used for cooperating with the inner ratchet 15 to drive the eccentric portion 17 and the movable scroll 10.

At the stage of starting the reverse rotation of the lower crankshaft 13-1, the outer protrusion (ratchet) of the inner ratchet wheel 15 cannot be matched with the inner recess (limiting step) of the outer ratchet wheel 18, namely, the inner ratchet wheel 15 cannot drive the outer ratchet wheel 18 to move under the state, so that the upper crankshaft 13-1 cannot be driven to move, at the moment, the pump body can be isolated in a rotating mode, and the inner gear pump 3 can rotate and the vortex plate 10 cannot rotate. The ratchet wheel base 14 is used for limiting the swing angle of the inner ratchet wheel 15 and preventing the inner ratchet wheel 15 from being invalid; the upper and lower end surfaces of the split upper and lower crankshafts are connected by end surface bearings 16, and play a role in supporting and lubricating when the two relatively move.

When the pump body part is fully soaked, the motor 6 stops running and rotates forwards, at the moment, the inner ratchet wheel 15 extends outwards under the action of centrifugal force, the outer convex part (ratchet) of the inner ratchet wheel clamps the inner concave part (limiting step) of the outer ratchet wheel 18, and the inner ratchet wheel is driven to rotate under the limiting action of the ratchet wheel base 14; because of the balance coefficient problem of the main and auxiliary balance blocks, the structure can only have one convex and concave matching, the rotating speed needs to be smaller to reduce the influence of the unbalance amount on the crankshaft 13 in the reverse rotation, the closer the crankshaft 13 split arrangement position to the eccentric part 17 is, the better the influence on the overall stability in the reverse rotation is, and the position is the maximum position of the outer diameter of the crankshaft 13, so that the rigidity of the related structure can be ensured.

It should be noted that "inward" is a direction toward the center of the accommodating space, and "outward" is a direction away from the center of the accommodating space.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in fig. 1 to facilitate the description of the invention and to simplify the description, but are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.