CN216975226U

CN216975226U - Scroll compressor

Info

Publication number: CN216975226U
Application number: CN202122608368.4U
Authority: CN
Inventors: 丁洪亮
Original assignee: Sanden Huayu Automotive Air Conditioning Co Ltd
Current assignee: Sanden Huayu Automotive Air Conditioning Co Ltd
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2022-07-15
Anticipated expiration: 2031-10-28

Abstract

The utility model relates to the technical field of compressors, and particularly discloses a scroll compressor which comprises a shell, an eccentric wheel, a first bearing, a movable scroll and a static scroll, wherein the shell is provided with a first bearing; the static vortex disk is fixed in the shell, the eccentric wheel is sleeved with the first bearing, one end of the movable vortex disk and the static vortex disk are enclosed to form a compression cavity, the other end of the movable vortex disk and the shell are enclosed to form a back pressure cavity, the other end of the movable vortex disk is fixedly connected with the outer ring of the first bearing, the shell is provided with a high-pressure exhaust cavity, the high-pressure exhaust cavity is communicated with the back pressure cavity, the high-pressure exhaust cavity receives high-pressure gas from the compression cavity, a first gas circuit is arranged on the movable vortex disk, one end of the first gas circuit is communicated with the compression cavity, and the other end of the first gas circuit is communicated with the back pressure cavity and is simultaneously opposite to the first bearing and gaps between the first bearing and the eccentric wheel. The scroll compressor solves the problems that the eccentric wheel is connected with the movable scroll through the first bearing, and the first bearing is easy to lack oil and generate heat or even cause abrasion when working for a long time.

Description

Scroll compressor

Technical Field

The utility model relates to the technical field of compressors, in particular to a scroll compressor.

Background

An oil separation structure is designed in an exhaust cavity of a scroll compressor in an air conditioning system, separated lubricating oil and high-pressure gas are conveyed to a back pressure cavity after being subjected to pressure reduction through a throttling element, and the back pressure cavity and an air suction cavity are separated by a sealing device. In the low-temperature heating working condition, the suction pressure is low, the axial force is small, the exhaust pressure is high to meet the requirement of the air outlet temperature, the phenomenon that the pressure of a back pressure cavity is too high after throttling is caused, large pressure is generated between the tooth top of the movable disc and the bottom plate of the static disc, and the friction resistance and even abrasion are increased.

In order to solve the above problems, as shown in fig. 1, in the prior art, an air passage is formed at a compression cavity of a scroll compressor, the air passage communicates the compression cavity with a back pressure cavity, the air passage is formed to ensure that the pressure in the back pressure cavity is greater than the pressure in the compression cavity under most working conditions, and the back pressure cavity gas is supplied to the compression cavity to achieve balance and prevent the compression cavity gas from flowing to the back pressure cavity.

However, in most scroll compressors, the eccentric wheel and the orbiting scroll are connected by a rolling bearing, and the rolling bearing is prone to oil shortage, heating and even abrasion after long-time operation.

SUMMERY OF THE UTILITY MODEL

The utility model aims to: the scroll compressor is provided to solve the problems that in the related art, rotating shafts of a plurality of scroll compressors are connected with the scroll compressors through rolling bearings, and the rolling bearings are prone to oil shortage and heating and even wear after long-time work.

The utility model provides a scroll compressor, which comprises a shell, an eccentric wheel, a first bearing, a movable scroll disk and a fixed scroll disk, wherein the eccentric wheel is arranged on the shell; the static vortex disc is fixed in the casing, first bearing sleeve is located the eccentric wheel, the one end of moving the vortex disc with the static vortex disc encloses and establishes into the compression chamber, the other end of moving the vortex disc with the casing encloses and establishes into the back pressure chamber, the other end of moving the vortex disc with the outer lane rigid coupling of first bearing, the casing is provided with high-pressure exhaust chamber, high-pressure exhaust chamber and back pressure chamber intercommunication, just high-pressure exhaust chamber receives the high-pressure gas who comes from the compression chamber, be provided with first gas circuit on moving the vortex disc, the one end of first gas circuit with the compression chamber intercommunication, the other end of first gas circuit with back pressure chamber intercommunication and simultaneously with first bearing and first bearing with the clearance between the eccentric wheel is relative.

As a preferable technical scheme of the scroll compressor, the inner ring of the first bearing is in clearance fit with the eccentric wheel.

As a preferable technical scheme of the scroll compressor, the outer peripheral surface of the eccentric wheel is provided with a tangent plane.

As a preferable technical scheme of the scroll compressor, a mounting ring is convexly arranged at the other end of the movable scroll along the axial direction of the movable scroll, and an outer ring of the first bearing is in interference fit with the mounting ring.

As a preferred technical scheme of the scroll compressor, the fixed scroll is provided with a second air path, one end of the second air path is fixedly connected with the high-pressure exhaust cavity, and the other end of the second air path is communicated with the back pressure cavity.

As the preferable technical scheme of the scroll compressor, the scroll compressor further comprises a driving piece, and a rotating shaft of the driving piece extends into the shell and is fixedly connected with the eccentric wheel.

As the preferable technical scheme of the scroll compressor, a crank pin is arranged at the fixedly connected end of the rotating shaft and the eccentric wheel, and the crank pin is inserted into the eccentric wheel and is in clearance fit with the eccentric wheel.

As the preferable technical scheme of the scroll compressor, the scroll compressor further comprises a second bearing, the second bearing is arranged in the shell, the outer ring of the second bearing is in interference fit with the shell, and the inner ring of the second bearing is sleeved on the rotating shaft and is in clearance fit with the rotating shaft.

As a preferred technical solution of the scroll compressor, the driving member is a motor.

As a preferable embodiment of the scroll compressor, the first bearing is a sliding bearing.

The utility model has the beneficial effects that:

the utility model provides a scroll compressor, which comprises a shell, an eccentric wheel, a first bearing, a movable scroll disk and a fixed scroll disk, wherein the eccentric wheel is arranged on the shell; the static vortex disc is fixed in the shell, the eccentric wheel is arranged on the first bearing sleeve, one end of the movable vortex disc and the static vortex disc are enclosed to form a compression cavity, the other end of the movable vortex disc and the shell are enclosed to form a back pressure cavity, the other end of the movable vortex disc is fixedly connected with the outer ring of the first bearing, the shell is provided with a high-pressure exhaust cavity, the high-pressure exhaust cavity is communicated with the back pressure cavity, the high-pressure exhaust cavity receives high-pressure gas from the compression cavity, a first gas path is arranged on the movable vortex disc, one end of the first gas path is communicated with the compression cavity, and the other end of the first gas path is communicated with the back pressure cavity and is simultaneously opposite to the first bearing and gaps between the first bearing and the eccentric wheel. When the scroll compressor works, compressed gas and lubricating oil are sent into the high-pressure exhaust cavity by the compression cavity, part of the high-pressure gas and lubricating oil are sent into the back pressure cavity by the high-pressure exhaust cavity, and then the pressure intensity of the gas in the back pressure cavity is larger than that of the gas in the compression cavity, so that the movable scroll disk and the fixed scroll disk can be abutted tightly. However, when the pressure of the gas in the back pressure chamber is far greater than that of the gas in the compression chamber, the mutual abutting force between the movable scroll and the fixed scroll is too large, so that the relative movement between the movable scroll and the fixed scroll is influenced, and even the abrasion is accelerated. Therefore, the first air path is arranged, the air in the back pressure cavity can flow into the compression cavity through the first air path, and the pressure values in the back pressure cavity and the compression cavity can be kept in a balanced state. And because the first air passage is simultaneously opposite to the first bearing and the gap between the first bearing and the eccentric wheel, when the gas in the back pressure cavity flows into the compression cavity through the first air passage, the lubricating oil in the back pressure cavity flows to the position of the first bearing and the position of the gap between the first bearing and the eccentric wheel, and then the lubricating and cooling effects can be achieved on the first bearing and the position of the gap between the first bearing and the eccentric wheel. The scroll compressor solves the problems that the eccentric wheels of most scroll compressors are connected with the movable scroll through the first bearing, and the first bearing is easy to lack oil and generate heat and even cause abrasion when working for a long time.

Drawings

FIG. 1 is a schematic view of a scroll compressor according to an embodiment of the present invention;

fig. 2 is a sectional view of an orbiting scroll according to an embodiment of the present invention;

fig. 3 is a plan view of an orbiting scroll according to an embodiment of the present invention.

In the figure:

1. a housing; 11. a high pressure exhaust chamber; 2. an eccentric wheel; 21. cutting a plane; 3. a first bearing; 4. a movable scroll pan; 41. a first gas path; 42. a mounting ring; 43. a compression chamber; 44. a back pressure chamber; 5. a static scroll pan; 51. a second gas path; 6. a drive member; 61. a rotating shaft; 611. a crankpin; 7. a second bearing.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present invention.

As shown in fig. 1 to 3, the present embodiment provides a scroll compressor including a housing 1, an eccentric wheel 2, a first bearing 3, a movable scroll 4, and a fixed scroll 5; the fixed scroll disk 5 is fixed in the shell 1, the eccentric wheel 2 is sleeved with the first bearing 3, one end of the movable scroll disk 4 and the fixed scroll disk 5 are enclosed to form a compression cavity 43, the other end of the movable scroll disk 4 and the shell 1 are enclosed to form a back pressure cavity 44, the other end of the movable scroll disk 4 is fixedly connected with the outer ring of the first bearing 3, the shell 1 is provided with a high-pressure exhaust cavity 11, the high-pressure exhaust cavity 11 is communicated with the back pressure cavity 44, the high-pressure exhaust cavity 11 receives high-pressure gas from the compression cavity 43, the movable scroll disk 4 is provided with a first air path 41, one end of the first air path 41 is communicated with the compression cavity 43, and the other end of the first air path 41 is communicated with the back pressure cavity 44 and is simultaneously opposite to the first bearing 3 and a gap between the first bearing 3 and the eccentric wheel 2. When the scroll compressor works, compressed gas and lubricating oil are sent into the high-pressure exhaust cavity 11 by the compression cavity 43, part of the high-pressure gas and lubricating oil are sent into the back pressure cavity 44 by the high-pressure exhaust cavity 11, so that the pressure of the gas in the back pressure cavity 44 is greater than that of the gas in the compression cavity 43, and the movable scroll disk 4 and the fixed scroll disk 5 can be abutted. However, when the pressure of the gas in the back pressure chamber 44 is much higher than that of the gas in the compression chamber 43, the mutual abutting force between the orbiting scroll 4 and the fixed scroll 5 is too large, thereby affecting the relative movement between the orbiting scroll 4 and the fixed scroll 5, and even accelerating the abrasion. Therefore, the first air passage 41 is provided, and the first air passage 41 can enable the wind gas in the back pressure cavity 44 to flow into the compression cavity 43, thereby ensuring that the pressure values in the back pressure cavity 44 and the compression cavity 43 are kept in a balanced state. Since the first air passage 41 is simultaneously opposite to the first bearing 3 and the gap between the first bearing 3 and the eccentric wheel 2, when the air in the back pressure chamber 44 flows into the compression chamber 43 through the first air passage 41, the lubricating oil in the back pressure chamber 44 flows to the position of the first bearing 3 and the position of the gap between the first bearing 3 and the eccentric wheel 2, and thus the lubricating and cooling effects can be exerted on the first bearing 3 and the gap between the first bearing 3 and the eccentric wheel 2. The scroll compressor solves the problems that the eccentric wheels 2 and the movable scroll disks 4 of most scroll compressors are connected through the first bearing 3, and the first bearing 3 is easy to lack oil and generate heat after long-time work, and even wear is caused.

Optionally, the inner ring of the first bearing 3 is clearance-fitted with the eccentric 2. In this embodiment, the clearance fit between the inner ring of the first bearing 3 and the eccentric wheel 2 can facilitate the lubricating oil to fill the clearance between the inner ring of the first bearing 3 and the eccentric wheel 2, so that a dynamic pressure oil film is generated between the inner ring of the first bearing 3 and the eccentric wheel 2, and the friction and wear between the inner ring of the first bearing 3 and the eccentric wheel 2 can be reduced.

Alternatively, the outer circumferential surface of the eccentric 2 is provided with a tangential plane 21. In this embodiment, when the eccentric wheel 2 is inserted into the inner ring of the first bearing 3, the tangential plane 21 and the inner ring of the first bearing 3 enclose an oil storage groove, and the lubricating oil in the back pressure chamber 44 can enter the oil storage groove. And further can provide lubricating oil between the inner ring of the first bearing 3 and the eccentric 2.

Optionally, a mounting ring 42 is protruded from the other end of orbiting scroll 4 in the axial direction of orbiting scroll 4, and the outer ring of first bearing 3 is interference-fitted with mounting ring 42. In this embodiment, mounting ring 42 is provided coaxially with orbiting scroll 4. In order to reduce the distance between the eccentric 2 and the annular wall of the mounting ring 42, the first bearing 3 is, in particular, a plain bearing. In other embodiments, the first bearing 3 may be a thin-walled ball bearing.

Optionally, the fixed scroll 5 is provided with a second air path 51, one end of the second air path 51 is fixedly connected with the high pressure discharge chamber 11, and the other end of the second air path 51 is communicated with the back pressure chamber 44. In the present embodiment, the second air passage 51 is integrated in the fixed scroll 5, and in other embodiments, the second air passage 51 may be separately provided.

Optionally, a driving member 6 is further included, and a rotating shaft 61 of the driving member 6 extends into the housing 1 and is fixedly connected with the eccentric wheel 2. In this embodiment, the driving member 6 is a motor.

Optionally, a crank pin 611 is disposed at a fixed end of the rotating shaft 61 and the eccentric wheel 2, and the crank pin 611 is inserted into the eccentric wheel 2 and is in clearance fit with the eccentric wheel 2. In this embodiment, the eccentric wheel 2 is eccentrically moved by the crank pin 611.

Optionally, the hybrid power transmission device further comprises a second bearing 7, the second bearing 7 is disposed in the housing 1, an outer ring of the second bearing 7 is in interference fit with the housing 1, and an inner ring of the second bearing 7 is sleeved on the rotating shaft 61 and is in clearance fit with the rotating shaft 61. In this embodiment, since the length of the rotating shaft 61 is long, the middle portion of the rotating shaft 61 may deform due to centrifugal force during the rotation of the rotating shaft 61, and thus the entire scroll compressor may vibrate. Therefore, the second bearing 7 is sleeved on the rotating shaft 61, so that the rotating shaft 61 can rotate more stably, and the middle part of the rotating shaft 61 is prevented from deforming.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A scroll compressor includes a housing (1), an eccentric wheel (2), a first bearing (3), a movable scroll (4) and a fixed scroll (5); the static scroll disk (5) is fixed in the shell (1), the first bearing (3) is sleeved on the eccentric wheel (2), one end of the movable scroll disk (4) is fixedly connected with the static scroll disk (5) to form a compression cavity (43), the other end of the movable scroll disk (4) is fixedly connected with the outer ring of the first bearing (3) and is arranged with the shell (1) to form a back pressure cavity (44), the other end of the movable scroll disk (4) is fixedly connected with the outer ring of the first bearing (3), the shell (1) is provided with a high-pressure exhaust cavity (11), the high-pressure exhaust cavity (11) is communicated with the back pressure cavity (44), the high-pressure exhaust cavity (11) receives high-pressure gas from the compression cavity (43), the static scroll disk (5) is characterized in that a first gas path (41) is arranged on the movable scroll disk (4), one end of the first gas path (41) is communicated with the compression cavity (43), and the other end of the first gas path (41) is communicated with the back pressure cavity (44) and is simultaneously communicated with the first bearing (3) and the eccentric wheel (2) The first bearing (3) is opposite to the eccentric wheel (2) in clearance.

2. The scroll compressor according to claim 1, wherein an inner ring of the first bearing (3) is clearance-fitted with the eccentric wheel (2).

3. The scroll compressor according to claim 2, wherein an outer circumferential surface of the eccentric wheel (2) is provided with a tangential plane (21).

4. The scroll compressor according to claim 1, wherein a mounting ring (42) is protruded from the other end of the orbiting scroll (4) in an axial direction of the orbiting scroll (4), and an outer ring of the first bearing (3) is interference-fitted with the mounting ring (42).

5. The scroll compressor according to claim 1, wherein the fixed scroll (5) is provided with a second gas path (51), one end of the second gas path (51) is fixedly connected to the high pressure discharge chamber (11), and the other end of the second gas path (51) is communicated with the back pressure chamber (44).

6. The scroll compressor according to claim 1, further comprising a driving member (6), wherein a rotating shaft (61) of the driving member (6) extends into the housing (1) and is fixedly connected with the eccentric wheel (2).

7. The scroll compressor according to claim 6, wherein a crank pin (611) is disposed at a fixed end of the rotating shaft (61) and the eccentric wheel (2), and the crank pin (611) is inserted into the eccentric wheel (2) and is in clearance fit with the eccentric wheel (2).

8. The scroll compressor according to claim 6, further comprising a second bearing (7), wherein the second bearing (7) is disposed in the casing (1), an outer ring of the second bearing (7) is in interference fit with the casing (1), and an inner ring of the second bearing (7) is sleeved on the rotating shaft (61) and is in clearance fit with the rotating shaft (61).

9. The scroll compressor according to any one of claims 6 to 8, wherein the driving member (6) is an electric motor.

10. The scroll compressor according to any one of claims 1 to 8, wherein the first bearing (3) is a sliding bearing.