CN109281836B

CN109281836B - Pump body structure and be equipped with its compressor

Info

Publication number: CN109281836B
Application number: CN201811416093.0A
Authority: CN
Inventors: 李自好; 樊峰刚; 张洪玮
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Priority date: 2018-11-26
Filing date: 2018-11-26
Publication date: 2024-05-31
Anticipated expiration: 2038-11-26
Also published as: CN109281836A

Abstract

The invention relates to a pump body structure and a compressor provided with the same, wherein the pump body structure comprises: the cylinder is provided with a cylinder cavity; the roller is rotatably arranged in the cylinder cavity, and a compression space is formed between the outer side wall of the roller and the cylinder cavity wall; the sliding vane is movably assembled on the air cylinder, and one end of the sliding vane is propped against the roller; when the pump body structure is in a compressed gas state, the compression space is divided into a low-pressure area and a high-pressure area by the sliding vane, and the sliding vane is in a self-locking state propped against the roller under the action of high-pressure gas in the high-pressure area. According to the pump body structure, no matter how large the pressure is applied to the sliding vane when the high-pressure gas in the high-pressure area and the liquid impact phenomenon occurs, the sliding vane is in a self-locking state of propping against the roller, so that the roller is always in close contact with the roller, the sliding vane is prevented from being separated from the roller to cause the high-pressure area and the low-pressure area to be in air leakage, and noise generated when the sliding vane is reset and impacted to the roller is avoided.

Description

Pump body structure and be equipped with its compressor

Technical Field

The invention relates to the technical field of compressors, in particular to a pump body structure and a compressor with the pump body structure.

Background

The rolling rotor compressor has the characteristics of simple and reliable structure, high gas transmission coefficient, small volume and the like, and is widely applied to refrigerators and air conditioning systems for compressing refrigerants.

At present, a rolling rotor type compressor comprises a cylinder with a cylinder cavity, wherein a roller driven by an eccentric crankshaft assembly is arranged in the cylinder cavity, a sliding vane groove is formed in the cylinder, and a sliding vane capable of sliding relative to the sliding vane groove is arranged in the sliding vane groove. One end of the sliding vane is always propped against the periphery of the roller so as to divide the cylinder cavity into an air suction cavity and a cylinder cavity, the volume of the air suction cavity and the volume of the cylinder cavity are continuously changed along with the rotation of the roller, and the pressure of gas in the cylinder cavity is increased along with the reduction of the cylinder cavity, so that the compression process of the compressor is completed.

In the above-mentioned rolling rotor compressor, since the sliding vane is often vertically abutted against the outer circumference of the roller by the spring pressure, when encountering the phenomenon of liquid impact caused by the suction of the compressor, the sliding vane will be separated from the roller due to the impact force greater than the force provided by the spring. When the sliding vane is separated from the roller, on one hand, the air suction cavity is communicated with the cylinder cavity to cause air cross, so that the refrigerating capacity of the compressor is greatly reduced; on the other hand, when the impact force is reduced, the slide will again bear against the outer periphery of the roller under the action of the spring force, so that a "clicking" noise is generated by the impact of the slide with the roller at the moment the slide contacts the roller.

Disclosure of Invention

Accordingly, it is necessary to provide a pump body structure capable of preventing the slide from being separated from the roller, and a compressor provided with the pump body structure, in order to solve the problem that the slide of the compressor is easily separated from the roller.

A pump body structure, the pump body structure comprising:

The cylinder is provided with a cylinder cavity;

The roller is rotatably arranged in the cylinder cavity, and a compression space is formed between the outer side wall of the roller and the cylinder cavity wall; and

The sliding vane is movably assembled on the air cylinder, and one end of the sliding vane is propped against the roller;

when the pump body structure is in a compressed gas state, the compression space is divided into a low-pressure area and a high-pressure area by the sliding vane, and the sliding vane is in a self-locking state propped against the roller under the action of high-pressure gas in the high-pressure area.

When the pump body structure is in a compressed gas state, the sliding vane is in a self-locking state propped against the roller under the action of high-pressure gas in the high-pressure area. Therefore, no matter how much pressure is applied to the sliding vane when the high-pressure gas in the high-pressure area and the liquid impact phenomenon occurs, the sliding vane is in a self-locking state of being propped against the roller, so that the roller is always in close contact with the roller, and the greater the pressure born by the sliding vane is, the more closely the sliding vane contacts with the roller, thereby avoiding the sliding vane from being separated from the roller to cause the high-pressure area and the low-pressure area to be in air leakage, and further avoiding the sliding vane from generating noise when the sliding vane is reset to collide with the roller.

In one embodiment, an intersection point of a side surface of the sliding vane located in the high pressure area and the cylinder cavity wall is taken as a tangent point, and an included angle between a tangent line of the sliding vane passing through the tangent point and a tangent line of the cylinder cavity wall is smaller than 60 degrees.

In one embodiment, an intersection point of a side surface of the sliding vane located in the high pressure area and the cylinder cavity wall is taken as a tangent point, and an included angle between a tangent line of the sliding vane passing through the tangent point and a tangent line of the cylinder cavity wall is larger than 45 degrees.

In one embodiment, the cross section of the sliding vane perpendicular to the rotation axis of the roller is in a fan shape, and when the pump body structure is in a compressed gas state, one side of the fan-shaped protrusion of the sliding vane is located in the high pressure area.

In one embodiment, the central angle of the sliding vane is larger than 60 degrees and smaller than 90 degrees.

In one embodiment, the cylinder is provided with a sliding vane groove, one end of the sliding vane groove is communicated with the cylinder cavity, the cross section of the sliding vane groove perpendicular to the rotating shaft of the roller is in a sector ring shape matched with the sliding vane, and the arc length of the sliding vane groove is larger than that of the sliding vane.

In one embodiment, the pump body structure further comprises an elastic piece arranged in the sliding piece groove, two ends of the elastic piece are respectively connected with the groove wall of the sliding piece groove and the sliding piece, and the elastic piece is used for exerting thrust towards the cylinder cavity on the sliding piece.

In one embodiment, the air cylinder is provided with an air suction port communicated with the low-pressure area and an air outlet communicated with the high-pressure area, and the air suction port and the air outlet are respectively positioned at two sides of the slide vane groove communicated with the outlet end of the air cylinder cavity wall.

In one embodiment, the air outlet communicates with the slider groove.

A compressor comprises the pump body structure.

Drawings

FIG. 1 is a schematic illustration of a pump body structure according to an embodiment of the present invention when compressed gas is prepared;

FIG. 2 is a schematic diagram of a pump body structure according to an embodiment of the present invention compressing a gas;

FIG. 3 is a schematic view of a pump body structure according to an embodiment of the present invention when the pump body structure is about to complete the exhaustion;

Fig. 4 is a schematic diagram of a pump body structure according to an embodiment of the present invention immediately after the exhaustion.

Detailed Description

In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, a compressor (not shown) of the present invention mainly includes a pump body structure 100 and a motor (not shown) for driving the pump body structure 100 to operate. In particular, in the following embodiments, the compressor is a rolling rotor compressor.

As shown in fig. 1-2, the pump body structure 100 includes a crankshaft assembly 30, a cylinder 10, rollers 50, and a slide 70. The cylinder 10 is provided with a cylinder cavity, the crankshaft assembly 30 can drive the roller 50 to rotate in the cylinder cavity, the sliding sheet 70 is movably assembled on the cylinder 10, and the roller 50 is matched with the sliding sheet 70 to continuously compress the gas in the cylinder cavity.

Specifically, the cylinder 10 is provided with a cylinder chamber having a circular cross section, and the cylinder chamber wall is provided with an air inlet 12 communicated with the cylinder chamber and an air outlet 14 communicated with the cylinder chamber at intervals along the circumferential direction. The air to be compressed is sucked into the cylinder chamber through the air suction port 12 and compressed in the cylinder chamber, and the compressed high-pressure air is discharged out of the cylinder chamber through the air outlet 14.

The outer diameter of the roller 50 is smaller than the inner diameter of the cylinder chamber, so that a compression space for filling gas is formed between the outer side wall of the roller 50 and the wall of the cylinder chamber. Moreover, the crankshaft assembly 30 rotates eccentrically such that the roller 50 always has a contact point with the cylinder chamber wall during rotation, and the position of the contact point moves circumferentially along the cylinder chamber wall as the roller 50 rotates.

The wall of the cylinder cavity is also provided with a sliding vane groove 16 with one end communicated with the cylinder cavity, and the outlet end of the sliding vane groove 16 communicated with the wall of the cylinder cavity is positioned between the air suction port 12 and the air outlet 14. The sliding vane 70 is limited in the sliding vane groove 16 and can slide along the sliding vane groove 16, and extends into the cylinder cavity from between the air suction port 12 and the air outlet 14 through the sliding vane groove 16 and abuts against the roller 50.

As shown in fig. 1, when the pump body structure 100 is in a state of being ready for compressed gas, the contact point of the roller 50 with the cylinder chamber wall is located on the side of the suction port 12 remote from the air outlet port 14. At this time, the compression space is partitioned by the vane 70 into a low pressure region 18 communicating with the suction port 12 and a high pressure region 19 communicating with the discharge port 14.

As shown in fig. 2, when the pump body structure 100 is in a state of compressing the gas, the roller 50 rotates in a direction away from the inlet port 12, so that the volume of the high pressure region 19 is continuously reduced to compress the gas in the high pressure region, and the compressed high pressure gas is discharged from the gas outlet 14. At the same time, the volume of the low-pressure region 18 is continuously increased and the gas to be compressed is continuously sucked in through the suction opening 12.

As shown in fig. 4, when the pump body structure 100 is in a state of completing the gas discharge, the sliding vane 70 is completely accommodated in the sliding vane groove 16 under the abutting of the roller 50, the gas in the high pressure region 19 is completely compressed, the high pressure region disappears, and the compression space is the low pressure region 18 filled with the gas to be compressed.

When the pump body structure 100 is in the compressed gas state, the slide 70 is in a self-locking state of abutting against the roller 50 by the high-pressure gas in the high-pressure region 19. Therefore, no matter how much pressure is applied to the sliding vane 70 when the high pressure gas in the high pressure area 19 and the liquid impact occurs, the sliding vane 70 is in a self-locking state against the roller 50, so that the roller 50 is always in close contact with the roller 50, and the greater the pressure is, the more closely the sliding vane 70 contacts with the roller 50, so that the high pressure area and the low pressure area are prevented from being in air leakage due to the separation of the sliding vane 70 from the roller 50, and the noise generated by the sliding vane 70 during the reset impact on the roller 50 is avoided.

With continued reference to fig. 1 and 2, in some embodiments, an intersection point between a side surface of the vane 70 located in the high pressure area 19 and the cylinder chamber wall is taken as a tangential point, and an included angle γ between a tangential line of the vane 70 passing through the tangential point and a tangential line of the cylinder chamber wall is greater than 45 ° and less than 60 °. In this way, when the pump body structure 100 is in a compressed gas state, the sliding vane 70 abuts against the roller 50 and forms a thrust angle relative to the roller 50 to block the high-pressure gas, so as to avoid the sliding vane 70 from separating from the roller 50 under the action of excessive impact force, and further avoid noise generated by collision between the sliding vane 70 and the roller 50 when the sliding vane 70 abuts against the roller 50 again. When the included angle γ is larger than 60 °, the sliding vane 70 is difficult to form a self-locking state with a reverse pushing angle, and the sliding vane 70 cannot be prevented from being separated from the roller 50. When the included angle γ is smaller than 45 °, the movement path of the sliding vane 70 extending out of the sliding vane groove 16 is too long, so that the strength requirement of the sliding vane 70 is increased, and the manufacturing cost is increased.

Further, the cross section of the vane 70 perpendicular to the rotation axis of the roller 50 is in a fan shape, when the pump body structure 100 is in a compressed gas state, one side of the fan-shaped protrusion of the vane 70 is located in the high pressure area 19, and one side of the fan-shaped recess of the vane 70 is located in the low pressure area 19. The cross section of the slide groove 16 perpendicular to the rotation axis of the roller 50 has a fan shape matching with the slide 70, and the arc length of the slide groove 16 is greater than that of the slide 70, so that the slide 70 can be completely accommodated in the slide groove 16. Specifically, in one embodiment, the vane slot 16 extends from one end of the communicating cylinder chamber wall toward the air inlet 12, and the center of the vane slot 16 faces the cylinder chamber, and the vane 70 slides smoothly in the vane slot 16 in the same direction as the vane slot 16. In this way, the bent and extended sliding piece 70 can move smoothly and smoothly relative to the cylinder 10, and is uniformly stressed, so that damage caused by friction in the sliding process is effectively avoided.

Specifically, in one embodiment, the central angle θ between the sliding vane 70 and the sliding vane groove 16 is greater than 60 ° and less than 90 °. If the central angle θ is smaller than 60 °, the length ratio of the portion of the sliding vane 70 extending out of the sliding vane groove 16 is too large, which results in too high strength requirements for the sliding vane 70 and increases manufacturing cost. If the central angle θ is greater than 90 °, the rapid rotation of the roller 50 may cause the walls of the vane 70 and the vane groove 16 to be damaged by serious friction, thereby breaking an oil film covering the vane 70 and the walls of the vane groove 16 to reduce the lifetime of the vane 70.

In some embodiments, the pump body structure 100 further includes a resilient member 90 disposed within the slide slot 16. The two ends of the elastic member 90 are respectively connected to the bottom wall of the slot wall of the vane slot 16, which is far away from one end of the cylinder cavity wall, and the vane 70, the elastic member 90 is always in a compressed state to apply a thrust force to the vane 70 towards the cylinder cavity, so that the vane 70 is always abutted against the outer side wall of the roller 50. In particular, in one embodiment, the resilient member 90 is a spring that extends along the slider slot 16. It will be appreciated that the configuration of the resilient member 90 is not limited.

As shown in FIG. 3, in one embodiment, the air outlet 14 communicates with the slider groove 16, and the air outlet area of the communicating slider groove 16 is about half the air outlet area of the air outlet 14. When the rollers 50 compress the vanes 70 so that the vanes 70 are completely accommodated in the vane grooves 16, the exhaust of the high-pressure region 19 is just ended, and the gas in the high-pressure region 19 is completely exhausted. If the opening position of the air outlet 14 moves away from the slide groove 16 and is not communicated with the slide groove 16, the air is exhausted in advance through the air outlet 14 before the roller 50 compresses the slide 70 to be completely accommodated in the slide groove 16, and at this time, the high pressure area 19 formed by the roller 50, the slide and the cylinder cavity wall is disconnected from the air outlet 14, so that the high pressure air therein cannot be exhausted thoroughly.

According to the pump body structure 100 and the compressor, the sliding vane 70 is in the shape of a fan ring and forms a certain inclination angle with the cylinder cavity, so that the sliding vane 70 is prevented from being separated from the roller 50 under the action of excessive impact force due to the liquid impact phenomenon, the fluctuation of the compression amount of the pump body structure 100 caused by the air leakage due to the communication between the high-pressure area and the low-pressure area is avoided, and meanwhile, the noise generated by the collision between the sliding vane 70 and the roller 50 during the resetting is avoided. Also, the movement of the bent sliders 70 in the slider grooves 16 is smooth, thereby reducing wear of the sliders 70. Further, since the vane groove 16 is in a sealed state not communicating with the outside of the cylinder 10, the high-pressure gas in the cylinder chamber can be prevented from leaking, and the power of the compressor provided with the pump body structure 100 can be improved.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. Pump body structure (100), characterized in that the pump body structure (100) comprises:

the cylinder (10) is provided with a cylinder cavity and a sliding vane groove (16) with one end communicated with the cylinder cavity;

A roller (50) rotatably arranged in the cylinder chamber, wherein a compression space is formed between the outer side wall of the roller (50) and the cylinder chamber wall; and

A slide sheet (70) which is limited in the slide sheet groove (16) and can slide along the slide sheet groove (16), and one end of the slide sheet (70) is propped against the roller (50);

The elastic piece (90) is arranged in the sliding vane groove (16), two ends of the elastic piece (90) are respectively connected with the groove wall of the sliding vane groove (16) and the sliding vane (70), and the elastic piece (90) is used for applying thrust to the sliding vane (70) towards the cylinder cavity;

The cross section of the sliding vane (70) perpendicular to the rotating shaft of the roller (50) is in a fan-shaped form, when the pump body structure (100) is in a compressed gas state, the compression space is divided into a low-pressure area (18) and a high-pressure area (19) by the sliding vane (70), one side of the fan-shaped bulge of the sliding vane (70) is positioned in the high-pressure area (19), and the sliding vane (70) is in a self-locking state propped against the roller (50) under the action of high-pressure gas in the high-pressure area (19).

2. Pump body structure (100) according to claim 1, characterized in that the angle between the tangent of the vane (70) passing through the tangent point and the tangent of the cylinder chamber wall is smaller than 60 ° with the intersection of the side surface of the vane (70) located in the high pressure area (19) and the cylinder chamber wall as the tangent point.

3. Pump body structure (100) according to claim 2, characterized in that the angle between the tangent of the vane (70) passing through the tangent point and the tangent of the cylinder chamber wall is greater than 45 ° with the intersection of the side surface of the vane (70) located in the high pressure region (19) and the cylinder chamber wall as the tangent point.

4. Pump body structure (100) according to claim 1, characterized in that the central angle of the slide (70) is greater than 60 ° and less than 90 °.

5. The pump body structure (100) according to claim 1, wherein the cylinder (10) is provided with a sliding vane groove (16) with one end communicated with the cylinder cavity, the cross section of the sliding vane groove (16) perpendicular to the rotation axis of the roller (50) is in a sector ring shape matched with the sliding vane (70), and the arc length of the sliding vane groove (16) is larger than that of the sliding vane (70).

6. Pump body structure (100) according to claim 1, characterized in that the cylinder (10) is provided with an air suction port (12) communicating with the low pressure area (18) and an air outlet (14) communicating with the high pressure area (19), the air suction port (12) and the air outlet (14) being respectively located at two sides of the slide groove (16) communicating with the outlet end of the cylinder cavity wall.

7. The pump body structure (100) according to claim 6, wherein the air outlet (14) communicates with the slide groove (16).

8. A compressor comprising a pump body structure (100) according to any one of claims 1 to 7.