CN116857188A

CN116857188A - Scroll compressor having a rotor with a rotor shaft having a rotor shaft with a

Info

Publication number: CN116857188A
Application number: CN202210918878.8A
Authority: CN
Inventors: 请求不公布姓名; 司玉宝; 尹斌
Original assignee: Hangzhou Lvneng New Energy Auto Parts Co ltd
Current assignee: Hangzhou Lvneng New Energy Auto Parts Co ltd
Priority date: 2022-08-02
Filing date: 2022-08-02
Publication date: 2023-10-10

Abstract

The application provides a scroll compressor, which comprises an movable scroll, a fixed scroll, a rotating shaft and a supporting piece, wherein the rotating shaft is matched with the supporting piece, one end of the rotating shaft is connected with the movable scroll, and the movable scroll is matched with the fixed scroll; the scroll compressor is provided with an oil groove, one end of the oil groove is communicated with the back pressure cavity, and the other end of the oil groove is communicated with the air suction cavity; the oil groove is arranged at the end part of the supporting piece, which is close to the movable vortex piece, the supporting piece comprises a bearing seat and a wear-resistant plate, and at least the middle section of the oil groove penetrates through the surface of the bearing seat and/or the wear-resistant plate. According to the application, at least the middle section of the oil groove which is communicated with the air suction cavity and the back pressure cavity penetrates through the surfaces of the bearing seat and/or the wear-resisting plate, so that the oil groove is convenient to process.

Description

Scroll compressor having a rotor with a rotor shaft having a rotor shaft with a

Technical Field

The application belongs to the field of compressors, and particularly relates to a scroll compressor.

Background

The scroll compressor of the related art has an oil return mechanism by which lubrication requirements of internal parts of the compressor are satisfied. The oil return mechanism is generally provided with an oil return channel positioned in the bearing seat body on the bearing seat, and the oil return channel is arranged in the bearing seat body, so that the problem of difficult processing of the oil return channel is often caused. To this end, there is a need for an improved scroll compressor.

Disclosure of Invention

In order to solve the problems, the application provides a scroll compressor which is convenient to process.

The application provides a scroll compressor, which comprises an movable scroll, a fixed scroll, a rotating shaft and a supporting piece, wherein the rotating shaft is matched with the supporting piece, one end of the rotating shaft is connected with the movable scroll, and the movable scroll is matched with the fixed scroll;

the scroll compressor is provided with a compression cavity, a back pressure cavity and an air suction cavity, wherein the compression cavity is positioned between the fixed scroll and the movable scroll, the air suction cavity is positioned at the outer side of the compression cavity, the air suction cavity is positioned at the inner side of a shell wall of the fixed scroll, the back pressure cavity is positioned between the movable scroll and the supporting piece, the scroll compressor is provided with an oil groove, one end of the oil groove is communicated with the back pressure cavity, and the other end of the oil groove is communicated with the air suction cavity; the oil groove is arranged at the end part of the supporting piece, which is close to the movable vortex piece, the supporting piece comprises a bearing seat and a wear-resistant plate, the wear-resistant plate is arranged between the movable vortex piece and the bearing seat, and at least the middle section of the oil groove penetrates through the surface of the bearing seat and/or the wear-resistant plate.

According to the scroll compressor provided by the application, at least the middle section of the oil groove which is communicated with the air suction cavity and the back pressure cavity penetrates through the surfaces of the bearing seat and/or the wear-resisting plate, so that the oil groove is convenient to process.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it will be apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.

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

FIG. 2 is a cross-sectional view of a scroll compressor according to an embodiment of the present application;

FIG. 3 is an exploded view of a scroll compressor according to an embodiment of the present application;

FIG. 4 is a perspective view of a support for a scroll compressor according to an embodiment of the present application;

FIG. 5 is an enlarged view of the portion of circle A in FIG. 2;

FIG. 6a is a cross-sectional view taken along the direction B-B in FIG. 4;

FIG. 6b is an enlarged view of the portion E of FIG. 6 a;

FIG. 7 is a partial perspective cross-sectional view of a scroll compressor according to an embodiment of the present application;

FIG. 8 is an enlarged view of the portion of oval C in FIG. 7;

FIG. 9 is a perspective view of a scroll compressor according to an embodiment of the present application;

FIG. 10 is a partial cross-sectional view of a scroll compressor according to an embodiment of the present application;

FIG. 11 is an enlarged view of the portion D of FIG. 10;

FIG. 12 is another exploded view of a portion of a scroll compressor according to an embodiment of the present application;

fig. 13 is a perspective view of a non-orbiting scroll member provided by an embodiment of the present application.

Detailed Description

For a better understanding of the technical solution of the present application, the following detailed description of the embodiments of the present application refers to the accompanying drawings.

It should be understood that the described embodiments are merely some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

As shown in fig. 1 to 13, the present embodiment provides a scroll compressor including an orbiting scroll 1, a non-orbiting scroll 2, a rotating shaft 3 and a supporting member 4, the rotating shaft 3 is mounted in cooperation with the supporting member 4, one end of the rotating shaft 3 is connected with the orbiting scroll 1, the orbiting scroll 1 is in cooperation with the non-orbiting scroll 2, the orbiting scroll 1 includes an orbiting end plate 11 and an orbiting scroll wall 12, the orbiting scroll wall 12 is connected with the orbiting end plate 11, and the orbiting scroll 12 extends along one side of the orbiting end plate 11, the non-orbiting scroll 2 includes a non-orbiting end plate 21 and a non-orbiting scroll wall 22, the non-orbiting scroll wall 22 is connected with the non-orbiting end plate 21, and the orbiting scroll 12 on the orbiting scroll 1 is in cooperative contact with the non-orbiting scroll wall 22 on the non-orbiting scroll 2, the non-orbiting scroll 2 further includes a shell wall 20, the shell wall 20 is located outside the non-orbiting scroll wall 22. Along the central axis direction of the rotating shaft 3, the fixed scroll 2 and the supporting piece 4 are respectively positioned at two sides of the movable scroll 1, namely one side of the movable scroll 1 is matched with the fixed scroll 2, and the other side of the movable scroll 1 is matched with the supporting piece 4.

The scroll compressor has a compression chamber 100, a back pressure chamber 200 and a suction chamber 300, the compression chamber 100 is located between the fixed scroll 2 and the movable scroll 1, the back pressure chamber 200 is located between the movable scroll 1 and the support 4, the suction chamber 300 is located between the fixed scroll 2 and the movable scroll 1, the suction chamber 300 is located outside the compression chamber 100, and the suction chamber 300 is located inside the shell wall 20 of the fixed scroll 2. One end of the rotating shaft 3 is provided with an eccentric part 31, and the movable vortex piece 1 is connected with the eccentric part 31, namely, the movable vortex piece 1 is eccentrically arranged relative to the central axis of the rotating shaft 3 body. When torque is provided for the rotating shaft 3, the rotating shaft 3 rotates to drive the movable vortex piece 1 to eccentrically rotate around the central axis of the rotating shaft 3, the movable vortex piece 1 rotates and moves in a translation mode relative to the fixed vortex piece 2, and the movable vortex wall 12 is meshed with the fixed vortex wall 22. The chamber formed by the movable scroll wall 12 and the fixed scroll wall 22 in the closed state around is a compression chamber 100, the scroll compressor has a plurality of compression chambers 100, when the end of the fixed scroll wall 22 (i.e., the outermost end along the radial direction of the rotating shaft 3) contacts the fixed scroll wall 22, the outermost compression chamber 100 is formed, the outside of the compression chamber 100 is an air suction chamber 300, and the air suction chamber 300 is located inside the shell wall 20 of the fixed scroll 2. With the orbiting motion of the orbiting scroll 1, the medium (oil-gas mixture) in the suction chamber 300 enters the outermost compression chamber 100, and the medium is gradually compressed and the pressure increases as the volume of the compression chamber 100 gradually decreases from the outside to the inside in the radial direction during the process of reaching the innermost compression chamber 100 (i.e., the central compression chamber 100) from the outermost compression chamber 100 via the other compression chambers 100.

The back pressure chamber 200 has many moving parts, in order to improve the operational reliability of the scroll compressor, oil needs to be supplied to the back pressure chamber 200, and each moving part in the back pressure chamber 200 is supplied to perform effective lubrication, but when more and more lubricating oil is accumulated in the back pressure chamber 200, the lubricating oil interacts with the moving part to generate larger power consumption, and in order to avoid that a large amount of lubricating oil is accumulated in the back pressure chamber 200, the scroll compressor of the embodiment has the oil groove 40, one end of the oil groove 40 is communicated with the back pressure chamber 200, the other end of the oil groove 40 is communicated with the suction chamber 300, the back pressure chamber 200 is communicated with the suction chamber 300 through the oil groove 40, a large amount of concrete problems of the lubricating oil in the back pressure chamber 200 can be reduced, and simultaneously, the lubricating oil can be introduced into the suction chamber 300, and the lubricating oil can be effectively supplied to the fixed scroll 2 and the movable scroll 1 for lubrication along with the medium reentering the compression chamber 100.

The related art sets up the passageway through the body inside at the support so as to supply oil, and set up the passageway in the body inside, the processing degree of difficulty is great, lubricating oil forms the oil product in the passageway easily in addition, especially lubricating oil viscosity increases under low temperature operating mode, cause the passageway to block up very easily, it is also comparatively difficult to clear up moreover, in addition, the inside moving part of back pressure chamber 200 also can have the problem of wearing and tearing, the impurity that produces can get into in the passageway along with lubricating oil, cause the passageway to block up in the past even appear the problem of consolidation, the follow-up clearance degree of difficulty and replacement cost have been increased more. In this embodiment, the oil groove 40 is disposed at the end of the supporting member 4 near the movable scroll 1, the supporting member 4 includes a bearing seat 41 and a wear-resistant plate 42, the wear-resistant plate 42 is located between the movable scroll 1 and the bearing seat 41, at least the middle section of the oil groove 40 penetrates through the surface of the bearing seat 41 and/or the wear-resistant plate 42, the oil groove 40 can be obtained only by grooving the surface of the bearing seat 41 and/or the wear-resistant plate 42, the processing is convenient, the oil groove can be obtained by processing such as turning and milling, and the structural strength damage to the bearing seat 41 is low, in addition, the cleaning is convenient during maintenance and cleaning, whether the bearing seat 4 is cleaned up or not can be determined by human eye recognition, and the service life of the supporting member 4 is prolonged. In this embodiment, the oil grooves 40 may be all disposed on the bearing seat 41 and penetrate through the surface of the bearing seat 41; or may be provided on the wear plate 42 and extend through the surface of the wear plate 42, or even through the wear plate 42; it is also possible that a part is provided on the bearing housing 41 and penetrates the surface of the bearing housing 41, and another part is provided on the wear plate 42 and penetrates the wear plate 42.

Specifically, referring again to fig. 3 and 4, the oil sump 40 includes an oil outlet groove section 40a and a throttle groove section 40b, one end of the oil outlet groove section 40a is communicated with the back pressure chamber 200, the other end is communicated with one end of the throttle groove section 40b, a portion of the throttle groove section 40b is communicated with the suction chamber 300, and the oil outlet groove section 40a and the throttle groove section 40b are both disposed at an end of the support member 4 near the orbiting scroll 1. The lubricating oil in the back pressure chamber 200 enters the throttling groove section 40b through the oil outlet groove section 40a, then flows along the throttling groove section 40b to the communicated part of the suction chamber 300, and finally enters the suction chamber 300.

Further, the throttle groove section 40b has an oil outlet 40c, the oil outlet 40c communicates with the suction chamber 300, the shell wall 20 of the fixed scroll 2 has a communication hole 20a, and the communication hole 20a communicates the suction chamber 300 and the oil outlet 40c, i.e., the oil outlet 40c is located at a portion where the shell wall 20 meets the support 4. The lubricating oil enters the communication hole 20a of the housing wall 20 through the oil outlet 40c of the throttle groove segment 40b, and then enters the suction chamber 300. In the process of compressing media, when the scroll compressor is in a rotary translation state, the area of the support piece 4 positioned at the inner side of the shell wall 20 is covered by the scroll 1 due to the translation of the scroll 1, if the oil outlet 40c is arranged in the area which can be covered by the scroll 1, the oil groove 40 and the air suction cavity 300 are intermittently blocked, the oil outlet 40c is arranged at the connecting part of the shell wall 20 and the support piece 4, and meanwhile, the communicating hole 20a is arranged at the corresponding part of the shell wall 20, the condition that the oil groove 40 is intermittently blocked from communicating with the air suction cavity 300 in the translation process of the scroll 1 can be avoided, so that the oil groove 40 and the air suction cavity 300 always keep in a communicating state, the oil supply to the moving area of the scroll 1 and the fixed scroll 2 is realized continuously, the abrasion between the scroll 1 and the fixed scroll 2 is reduced, the reliability of the scroll compressor is ensured, in addition, the communicating hole 20a can intercept the lubricating oil entering the air suction cavity 300 from the oil outlet 40c, the lubricating oil is dispersed, the lubricating oil is reduced, and the lubricating oil is concentrated, and the lubricating oil is better dispersed to be fully lubricated. The communication hole 20a is disposed along the inner side of the shell wall 20, and as shown in fig. 13, the communication hole 20a is in a notch structure, that is, the inner structure of the communication hole 20a can be seen when the inner side of the shell wall 20 is seen, so that the blocking condition is reduced, and meanwhile, the subsequent maintenance and cleaning are facilitated. In this embodiment, the suction port 20b is located beside the outer opening of the fixed scroll wall 22, and the medium can smoothly enter the compression chamber from the opening formed by the fixed scroll wall 22 and the movable scroll wall 12 after passing through the suction port 20b, and the communication hole 20a and the suction port 20b have a distance along the circumferential direction of the shell wall 20, and the communication hole 20a and the suction port 20b have a distance therebetween, so that the lubricant entering the suction chamber 300 can flow and be depressurized and then enter the compression chamber.

Furthermore, the movable vortex piece needs to rotate, a certain gap exists, when the pressure of the compression cavity is increased to a certain degree due to the existence of the gap, the movable vortex piece is pushed to be far away from the fixed vortex piece, the movable vortex piece and the fixed vortex piece generate the gap, the leakage of compression medium occurs, and the working efficiency of the vortex compressor is reduced. For this purpose, the orbiting scroll 1 has a first pressure guiding hole 11a and a second pressure guiding hole 11b, please refer to fig. 2 again, and referring to fig. 5, the first pressure guiding hole 11a and the second pressure guiding hole 11b are both communicated with the back pressure chamber 200, wherein the first pressure guiding hole 11a is provided at the orbiting end plate 11 and is communicated with the compression chamber 100 at the center; or the first pressure guiding hole 11a is provided at the starting end (i.e., the innermost end along the radial direction of the rotating shaft 3) of the orbiting scroll wall 12 and penetrates the entire orbiting scroll 1. In other words, the first pressure introduction hole 11a introduces the high-pressure medium in the compression chamber 100 into the back pressure chamber 200, so that the back pressure chamber 200 maintains a certain pressure, and generates a directional thrust force against the pressure in the compression chamber 100, thereby reducing the leakage of the compressed medium caused by the separation of the movable scroll and the fixed scroll. In addition, the second pressure introduction hole 11b is provided at the movable end plate 11 and communicates with the compression chamber 100 beside the central compression chamber 100, in other words, the second pressure introduction hole 11b communicates with the compression chamber 100 having a medium pressure, and the pressures of the back pressure chamber 200 and the central compression chamber 100 are maintained in dynamic balance through the second pressure introduction hole 11b to improve the operation stability of the scroll compressor. In addition, the back pressure chamber 200 needs to have pressure, so that sealability needs to be ensured, the scroll compressor includes a back pressure sealing structure including a first back pressure seal 201 and a second back pressure seal 202, the first back pressure seal 201 is located between the movable end plate 11 and the support 4, and the second back pressure seal 202 is located between the rotating shaft 3 and the support 4 to perform shaft sealing, so that the pressure introduced into the back pressure chamber 200 through the first pressure introduction hole 11a does not leak, and the back pressure chamber 200 has pressure to separate the movable scroll 1 from the fixed scroll 2 against the pressure in the compression chamber 100. In this embodiment, the first back pressure seal 201 may be sealed with a single seal or may be sealed with a combination of two or more seals. The first pressure guiding hole 11a has an orifice section 11a1, the orifice section 11a1 is located at one end of the first pressure guiding hole 11a near the back pressure chamber 200, the aperture of the orifice section 11a1 is smaller than the apertures of the rest sections of the first pressure guiding hole 11a, and the medium entering the back pressure chamber 200 is throttled and decompressed through the orifice section 11a1 to reduce the impact. The second pressure guiding hole 11b is internally provided with the filter screen 11b1, and impurities generated by movement of moving parts in the back pressure cavity 200 can be reduced and blocked through the filter screen 11b1 to enter the compression cavity 100, so that the working performance of the scroll compressor can be improved.

Referring to fig. 6a and 6b in combination, the oil outlet groove 40a is disposed on the bearing seat 41, and the oil outlet groove 40a penetrates the surface of the bearing seat 41. The cross-sectional area of the oil outlet groove section 40a is larger than that of the throttling groove section 40b, that is, lubricating oil enters the air suction cavity 300 from the back pressure cavity 200, and enters the throttling groove section 40b with a small cross section from the large cross section of the oil outlet groove section 40a to throttle and reduce pressure, so that flow resistance is increased, and the back pressure cavity 200 has a certain pressure, which is larger than that of the air suction cavity 300, and the throttling groove section 40b is arranged to reduce pressure of the lubricating oil, so that the problem of cylinder flushing is reduced. Specifically, the throttling groove section 40b is at least partially disposed along an arc shape, the arc-shaped axis of the throttling groove section 40b is the same as or parallel to the axis of the support member 4, the throttling groove section 40b includes a first section 40b1, a second section 40b2 and a third section 40b3, the first section 40b1, the second section 40b2 and the third section 40b3 are sequentially connected, the first section 40b1 is communicated with the oil outlet groove section 40a, the third section 40b3 is communicated with the air suction cavity 300, the second section 40b2 is arc-shaped, and the first section 40b1 and the third section 40b3 are disposed along the radial direction of the support member 4. In this embodiment, by arranging the partial section (i.e., the second section 40b 2) of the throttling groove section 40b in an arc shape, the flow path of the lubricating oil in the throttling groove section 40b is prolonged, the pressure of the lubricating oil can be further reduced, and the throttling effect is enhanced.

Referring again to fig. 3 and 4, the wear plate 42 covers the surface of the bearing housing 41. In this embodiment, the throttling groove section 40b is located at the end of the bearing seat 41 near the movable scroll 1, and the throttling groove section 40b penetrates through the surface of the bearing seat 41, that is, the surface of the bearing seat 41 is grooved to obtain the throttling groove section 40b, the wear-resisting plate 42 is provided with an opening 40d, the opening 40d is communicated with the oil outlet 40c and the communication hole 20a, the grooving condition of the wear-resisting plate 42 is reduced, the surface of the wear-resisting plate 42 is smooth, the movable scroll 1 is in sliding contact with the wear-resisting plate 42 in the process of rotary translation, friction between the movable scroll 1 and the wear-resisting plate 42 can be effectively reduced, and the working stability and reliability of the scroll compressor are improved.

Or, the throttle groove section 40b is arranged on the wear-resisting plate 42, the throttle groove section 40b penetrates through the wear-resisting plate 42 along the axial direction of the rotating shaft 3, not shown in the drawing, the throttle groove section 40b is at least partially arranged in an arc shape, the grooving process of the bearing seat 41 is reduced by arranging the throttle groove section 40b on the wear-resisting plate 42, the wear-resisting plate 42 is convenient to replace, and the replacement cost is low, in addition, at least part of the throttle groove section 40b is close to the inner side of the shell wall 20 of the fixed scroll 2 or at least part of the throttle groove section 40b is positioned between the joint of the shell wall 20 and the wear-resisting plate 42, so that friction can be reduced when the throttle groove section 40b is arranged outside the translation range of the movable scroll 1, and a large amount of lubricating oil in the throttle groove section 40b can be prevented from entering the air suction cavity 300 when at least part of the throttle groove section 40b is positioned between the joint of the shell wall 20 and the wear-resisting plate 42.

Referring again to fig. 1 to 3, in the present embodiment, the shell wall 20 of the fixed scroll 2 has an air suction port 20b, and the air suction port 20b communicates with the air suction chamber 300. The scroll compressor comprises an exhaust cover 5 and a shell 6, the shell 6 is provided with an air inlet 60, the scroll compressor is provided with an air inlet cavity 400, the air inlet 60 is communicated with the air inlet cavity 400, the support member 4 is at least partially arranged in the shell 6, and the air inlet cavity 400 is positioned between the support member 4 and the shell 6 (namely, the side of the support member 4, which is away from the movable scroll member 1, and the inner wall of the shell 6 are enclosed to form the air inlet cavity 400). The non-orbiting scroll 2 is at least partially located within the discharge cover 5, the scroll compressor has a low pressure chamber 500, the low pressure chamber 500 is located between the non-orbiting scroll 2 and the discharge cover 5, the low pressure chamber 500 includes a first chamber 500a, the first chamber 500a is located between the shell wall 20 of the non-orbiting scroll 2 and the peripheral wall of the discharge cover 5, the first chamber 500a communicates with the suction port 20b, the support 4 has at least one through-hole 4a, and the through-hole 4a communicates with the first chamber 500a and the suction chamber 400. In the process of compressing the medium, the medium enters the air inlet cavity 400 at the back of the supporting piece 4 from the air inlet 60 of the shell 6, then enters the first cavity 500a between the shell wall 20 and the peripheral wall of the exhaust cover 5 from the through hole 4a on the supporting piece 4, then enters the air suction cavity 300 from the air suction port 20b on the shell wall 20, and enters the compression cavity 100 for compression along with the rotary translation of the movable vortex piece 1. Wherein the exhaust cover 5 is connected with the supporting piece 4 or the shell 6, and when the supporting piece 4 is completely positioned in the shell 6, the exhaust cover 5 is connected with the shell 6; when the supporting member 4 is partially located in the casing 6, the exhaust cover 5 is connected to the supporting member 4, and in this embodiment, the connection manner of the exhaust cover 5 and the supporting member 4 or the casing 6 is not limited, and may be a fastening member such as a bolt, or may be a fastening member, an adhesive member, a welding member, or a combination of the above connection manners.

Referring again to fig. 3, in conjunction with fig. 7, the scroll compressor has a high pressure chamber 600, the high pressure chamber 600 being located between the fixed end plate 21 and the discharge cover 5, the scroll compressor including an oil separator (not shown in the drawings), the discharge cover 5 having an oil separator mounting port 50, the oil separator being mounted in the oil separator mounting port 50. The discharge cover 5 has an oil return hole 51 and an oil inlet passage 52, the oil inlet passage 52 communicates with the oil return hole 51 and the high pressure chamber 600, the fixed end plate 21 has a discharge port 21a, the discharge port 21a communicates with the high pressure chamber 600, and the discharge port 21a communicates with the compression chamber 100 located at the center. The medium is gradually compressed in the process of reaching the central compression chamber 100 from the outermost compression chamber 100, and finally discharged into the high-pressure chamber 600 from the discharge port 21a communicating with the central compression chamber 100, and then enters the oil separator, the separated medium refrigerant is discharged from the outlet of the oil separator, the lubricating oil mixed in the medium is separated by the separation action of the oil separator, and remains in the high-pressure chamber 600, and at least part of the lubricating oil enters the oil return hole 51 from the oil inlet passage 52.

Further, the low pressure chamber 500 further includes a second chamber 500b, the second chamber 500b being located between the fixed end plate 21 of the fixed scroll 2 and the discharge cover 5, the second chamber 500b being located outside the high pressure chamber 600. Since the pressures of the low pressure chamber 500 and the high pressure chamber 600 are different, in order to prevent the medium in the high pressure chamber 600 from leaking into the low pressure chamber 500, the scroll compressor includes the sealing member 23, the sealing member 23 is provided at the fixed end plate 21, the sealing member 23 is positioned between the fixed end plate 21 and the exhaust cover 5, the high pressure chamber 600 is positioned at the inner side of the sealing member 23, the second chamber 500b is positioned at the outer side of the sealing member 23, and the high pressure chamber 600 and the second chamber 500b are separated by the sealing member 23 to prevent leakage.

Referring to fig. 7, 8 and 4 in combination, in the present embodiment, the scroll compressor has a first oil port 701, a second oil port 702 and an oil intake path 700, the first oil port 701 is located at the fixed scroll 2, the first oil port 701 is communicated with the oil return hole 51, the second oil port 702 is located at the support 4, the second oil port 702 is communicated with the back pressure chamber 200, the oil intake path 700 is communicated with the first oil port 701 and the second oil port 702, the oil intake path 700 includes a first oil path 703 and a second oil path 704, the first oil path 703 is communicated with the second oil path 704, the first oil path 703 is located at the fixed scroll 2, the second oil path 704 is located at the end of the support 4 near the movable scroll 1, and the second oil path 704 penetrates the surface of the bearing seat 41 and/or the wear plate 42. The lubricating oil introduced into the oil return hole 51 passes through the first oil passage 703 and then enters the second oil passage 704, and then enters the back pressure chamber 200 from the second oil port 702, thereby lubricating moving parts inside the back pressure chamber 200 to ensure the reliability of operation. In this embodiment, the scroll compressor includes a filter element 705 and a throttle plug 708, the filter element 705 is disposed in the oil return hole 51, and the filter element 705 is at least partially disposed between the first oil port 701 and the interface between the oil inlet channel 52 and the oil return hole 51, so as to filter impurities in the lubricating oil, avoid the impurities from affecting the lubricating performance, reduce the risk of blocking the oil path, and further have a certain throttling effect, the throttle plug 708 is disposed in the first oil path 703, and since the oil return hole 51 is communicated with the high pressure chamber 600, the pressure in the oil return hole 51 is higher, and the throttle is enhanced by the throttle plug 708, so as to reduce the pressure of the lubricating oil flowing into the oil inlet path 700. The throttle plug 708 has a throttle through hole 708a, the throttle through hole 708a communicates with the first oil passage 703, and the aperture of the throttle through hole 708a is smaller than the aperture of the first oil passage 703.

Further, the fixed scroll 2 has a third oil port 706 and a third oil passage 707, the third oil port 706 being in communication with the second chamber 500b, the third oil passage 707 being in communication with the third oil port 706 and the first oil passage 703. The throttle plug 708 is positioned between the first oil port 701 and the interface of the third oil passage 707 and the first oil passage 703; the lubrication oil is filtered by the filter element 705 and then throttled by the throttle plug 708, flows to the second oil passage 704 and the third oil passage 707, and enters the back pressure chamber 200 and the second chamber 500b. In this embodiment, the pressure of the second chamber 500b is lower than that of the back pressure chamber 200, so that most of the lubricating oil enters the second chamber 500b, while the back pressure chamber 200 has a certain pressure, and a small portion of the lubricating oil enters the back pressure chamber 200. In addition, since the first oil passage 703, the third oil passage 707, and the third oil port 706 are all located in the fixed scroll 2, the flow path of the lubricating oil flowing from the high-pressure chamber 600 into the second chamber 500b is short, the third oil passage 707 has a throttle section 707a, the throttle section 707a is located at one end of the third oil passage 707 near the second chamber 500b, the third oil port 706 is located at the end of the throttle section 707a near the second chamber 500b, and in addition, the inner wall of the exhaust cover 5 has a notch 53, the notch 53 is opposite to the third oil port 706, the lubricating oil enters the notch 53 after being throttled again by the throttle section 707a, and is intercepted by the bottom surface of the notch 53 to sufficiently reduce the flow rate of the lubricating oil, and the second chamber 500b serves as an oil storage area of the lubricating oil.

Referring to fig. 10 and 11 in combination, the first chamber 500a and the second chamber 500b can communicate through the gap 10 between the non-orbiting scroll 2 and the discharge cover 5. The gap can be a matching gap between the fixed scroll 2 and the exhaust cover 5, or can be a gap reserved specially in the design or processing process of the fixed scroll 2 and the exhaust cover 5. And the second chamber 500b has a narrow passage 500c, the narrow passage 500c is located between the third oil port 706 and the slit, i.e., the narrow passage 500c is located on the way of the lubricating oil from the third oil port 706 to the slit, the cross section of the lubricating oil flowing through the narrow passage 500c is narrowed, the flow resistance of the lubricating oil is increased, the pressure is reduced, and then the lubricating oil is introduced into the first chamber 500a through the slit, and the sucked medium carries the lubricating oil into the compression chamber 100, so as to sufficiently lubricate the mutual moving parts of the scroll, thereby improving the working performance of the scroll compressor.

Referring to fig. 3 in combination with fig. 12 again, in the present embodiment, the second oil path 704 includes a first groove segment 704a and a second groove segment 704b, the first groove segment 704a is connected to the second groove segment 704b, the first groove segment 704a is communicated with the first oil path 703, and the second groove segment 704b is communicated with the back pressure chamber 200. Wherein the cross-sectional area of the first groove section 704a is smaller than the cross-sectional area of the first oil passage 703. As shown by arrows in fig. 3 and 12, the lubricating oil entering the oil return hole 51 passes through the first oil passage 703 and then enters the first groove section 704a of the second oil passage 704, and since the cross-sectional area of the first groove section 704a is smaller than that of the first oil passage 703, the flow resistance of the lubricating oil is increased, the flow rate is reduced, and in this embodiment, the first groove section 704a is at least partially arranged in an arc shape along the surface of the support member 4, thereby prolonging the flow path of the lubricating oil and being more conducive to the effect of throttling. In addition, the second groove section 704b has at least one corner 704c, which can both decelerate the lubrication oil flowing in from the first groove section 704a and block the lubrication oil in the back pressure chamber 200 from the second groove section 704b to the first groove section 704a to some extent. In addition, the cross-sectional area of the first groove segment 704a is smaller than the cross-sectional area of the second groove segment 704b, which also reduces the possibility of the lubricant in the back pressure chamber 200 entering the first groove segment 704a from the second groove segment 704 b.

In this embodiment, the first groove segment 704a is disposed on the wear plate 42 and penetrates through the wear plate 42, and the second groove segment 704b is disposed on the bearing seat 41 and penetrates through the surface of the bearing seat 41; the first groove section 704a is arranged on the wear-resisting plate 42, and has the advantages that the lubricating oil in the first groove section 704a covers the surface of the wear-resisting plate 42 in the translational process of the movable vortex piece 1, so that the contact surface of the wear-resisting plate 42 and the movable vortex piece 1 can be covered with a layer of oil film, the sealing performance of the back pressure cavity 200 is improved, the friction coefficient of the movable vortex piece 1 and the wear-resisting plate 42 in the relative movement process can be reduced, and the service life is prolonged.

Referring again to fig. 7, 8 and 10, the scroll compressor has an oil housing 8, the oil housing 8 is located between a fixed end plate 21 and an exhaust cover 5, the high pressure chamber 600 includes a first high pressure chamber 601 and a second high pressure chamber 602, the first high pressure chamber 601 is located between the oil housing 8 and the exhaust cover 5, the second high pressure chamber 602 is located between the fixed end plate 21 and the oil housing 8, an oil drain of the oil separator communicates with the first high pressure chamber 601, an exhaust port 21a communicates with the second high pressure chamber 602, the oil housing 8 has a through hole 80, and the through hole 80 is located beside an inlet of the oil intake passage 52. After the scroll compressor is installed in a horizontal mode (as shown in fig. 9, the oil inlet channel 52 is located on one side of the exhaust cover 5 away from the oil separator (namely, the oil inlet channel 52 is located below the oil outlet of the oil separator), after the separation effect of the oil separator, lubricating oil is discharged from the oil outlet of the oil separator to the first high-pressure cavity 601 and then flows to the bottom of the first high-pressure cavity 601 under the action of gravity, the through hole 80 is located in the bottom area of the first high-pressure cavity 601, then the lubricating oil enters the second high-pressure cavity 602 through the through hole 80, enters the oil return hole 51 from the oil inlet channel 52 communicated with the second high-pressure cavity 602, and in order to prevent the lubricating oil in the second high-pressure cavity 602 from directly rushing into the oil inlet oil path 700, a sealing ring is arranged on the periphery of the oil return hole 51. In this embodiment, the oil housing 8 is provided with the air discharge hole 81, and after the compressed medium discharged from the air discharge hole 21a enters the second high pressure chamber 602, the oil housing 8 performs a preliminary oil separation action on the compressed medium, and then the compressed medium enters the first high pressure chamber 601 from the air discharge hole, and after the secondary oil separation action of the oil separator, the refrigerant in the compressed medium (without excluding the possibility of containing a small amount of lubricating oil) is discharged from the scroll compressor, and the lubricating oil (without excluding the possibility of containing a small amount of lubricating oil) is left in the scroll compressor.

Referring again to fig. 2, in the above embodiment, the scroll compressor includes a driving unit including a motor 7, the motor 7 is installed in the housing 6, the motor 7 is located in the air intake chamber 400, the motor 7 is connected with the rotating shaft 3, the scroll compressor further includes a bearing 9, one end of the rotating shaft 3 is cooperatively connected with the supporting member 4 through at least one bearing 9, and the other end is cooperatively connected with the housing 6 through at least one bearing 9. The motor 7 is used for providing torque for the rotating shaft 3, the rotating shaft 3 drives the movable vortex piece 1 to rotate around the central axis of the main body of the rotating shaft 3 and translate relative to the fixed vortex piece 2, the bearing 9 supports the rotating shaft 3, the friction coefficient in the moving process is reduced, the rotation precision is ensured, and the stability of the vortex compressor is improved.

In the above embodiment, the scroll compressor is in a horizontal state, the oil groove 40 is located at the lower part of the supporting member 4, that is, along the central line direction of the oil separator mounting port 50, the scroll compressor is divided into an upper part and a lower part, the oil separator mounting port 50 is located at the upper part of the scroll compressor, the oil groove 40 is located at the lower part of the scroll compressor, the lubricating oil can be gathered in the oil groove 40 by gravity and discharged into the suction chamber 300 through the oil outlet 40c by pressure difference, and immediately mixed with the sucked medium and enter the compression chamber 100 to lubricate the working part of the scroll, by the design of the oil passage, the lubricating oil content between the two scroll members in the low temperature heating condition can be effectively improved, and the fixed end plate 21 is provided with the capillary passage, which is located at the side of the third oil passage, the capillary passage is communicated with the first chamber 500a and the second chamber 500b, and the lubricating oil in the second chamber 500b can enter the first chamber 500a through the capillary passage to lubricate the working part of the scroll member. In addition, the cross-sectional size of the throttling groove section 40b is smaller, so that a large amount of lubricating oil accumulated in the back pressure cavity can enter the suction cavity 300 only by a small amount of lubricating oil, thereby not only playing a role in low-temperature heating lubrication, but also effectively inhibiting the oil discharge rate (OCR) of the compressor. In addition, the second pressure guiding hole 11b is located at the lower part of the movable end plate 11, that is, the second pressure guiding hole 11b is also located at the lower part of the scroll compressor, when the second oil path 704 discharges oil unevenly, the lubricating oil can enter the compression cavity 100 through the second pressure guiding hole 11b, so that a great amount of accumulation of the lubricating oil in the back pressure cavity 200 can be effectively avoided, interaction between the lubricating oil and moving parts in the back pressure cavity 200 is reduced, and power consumption is reduced.

In the above embodiment, the cross section refers to a cross section perpendicular to the flow direction of the lubricating oil. Some of the technical implementations in the above embodiments may be combined or replaced.

The above embodiments are only for illustrating the present application and not for limiting the technical solutions described in the present application, and the understanding of the present specification should be based on the description of directionality such as "front", "rear", "left", "right", "upper", "lower", etc. by the skilled person, only for describing the relationship between the objects, and not for limiting the nature, "a plurality" means at least two or more.

Although the application has been described in detail with reference to the above embodiments, it will be understood by those skilled in the art that the modifications and equivalents may be made thereto without departing from the spirit and scope of the application as defined in the appended claims.

Claims

1. The scroll compressor is characterized by comprising an movable scroll, a fixed scroll, a rotating shaft and a supporting piece, wherein the rotating shaft is matched with the supporting piece, one end of the rotating shaft is connected with the movable scroll, and the movable scroll is matched with the fixed scroll;

2. The scroll compressor of claim 1, wherein the oil sump includes an oil sump section and a throttle sump section, one end of the oil sump section being in communication with the back pressure chamber and the other end being in communication with one end of the throttle sump section, the throttle sump section being in part in communication with the suction chamber;

the cross-sectional area of play oil groove section is greater than the cross-sectional area of throttling groove section, go out the oil groove section set up in the bearing frame, and go out the oil groove section and run through the surface of bearing frame, throttling groove section has the oil-out, the oil-out communicates with each other with the chamber of breathing in, the shell wall of deciding the vortex piece has the intercommunicating pore, intercommunicating pore intercommunication breathing in chamber and oil-out, the intercommunicating pore sets up along the inboard of shell wall, the intercommunicating pore is the opening structure.

3. The scroll compressor of claim 2, wherein the wear plate covers a surface of the bearing housing, the throttle groove section is located on the bearing housing, and the throttle groove section penetrates through the surface of the bearing housing, the throttle groove section is at least partially arranged in an arc shape, and the wear plate has an opening, and the opening communicates with the oil outlet and the communication hole;

or the throttling groove section is positioned on the wear-resisting plate, at least part of the throttling groove section is arranged in an arc shape, at least part of the throttling groove section is close to the inner side of the shell wall of the non-orbiting scroll member or at least part of the throttling groove section is positioned between the supporting piece and the shell wall.

4. The scroll compressor of claim 2, wherein the throttling groove section includes a first section, a second section, and a third section, the first section, the second section, and the third section being connected in sequence, the first section being in communication with the oil discharge groove section, the third section being in communication with the suction chamber, the second section being arcuate, the first section and the third section being disposed along a radial direction of the support member.

5. A scroll compressor according to claim 3, wherein a shell wall of the fixed scroll has an air suction port communicating with an air suction chamber, the communication hole and the air suction port having a pitch in a circumferential direction of the shell wall, the fixed scroll has a fixed scroll wall, the air suction port being located beside an outer opening of the fixed scroll wall;

the scroll compressor comprises a shell, wherein the shell is provided with an air inlet cavity, the air inlet cavity is communicated with the air inlet cavity, the supporting piece is at least partially arranged in the shell, and the air inlet cavity is positioned between the supporting piece and the shell;

the scroll compressor comprises a discharge cover, the fixed scroll is at least partially positioned in the discharge cover, the scroll compressor is provided with a low-pressure cavity, the low-pressure cavity is positioned between the fixed scroll and the discharge cover, the low-pressure cavity comprises a first cavity, the first cavity is positioned between the shell wall of the fixed scroll and the peripheral wall of the discharge cover, the first cavity is communicated with an air suction port, and the support piece is provided with at least one through hole, and the through hole is communicated with the first cavity and the air suction cavity;

the exhaust cover is connected with the supporting piece or the shell.

6. The scroll compressor of claim 5, wherein the scroll compressor has a high pressure chamber, the fixed scroll member includes a fixed end plate, the high pressure chamber is located between the fixed end plate and a discharge cover, the scroll compressor includes an oil separator mounted to the discharge cover, the discharge cover has an oil return hole and an oil inlet passage, the oil inlet passage communicates with the oil return hole and the high pressure chamber, the oil inlet passage is located on a side of the discharge cover remote from the oil separator, the fixed end plate has an exhaust port, the exhaust port communicates with the high pressure chamber, and the exhaust port communicates with a centrally located compression chamber;

the scroll compressor is provided with a first oil port, a second oil port and an oil inlet oil way, the first oil port is positioned on a fixed scroll, the first oil port is communicated with the oil return hole, the second oil port is positioned on a supporting piece, the second oil port is communicated with the back pressure cavity, the oil inlet oil way is communicated with the first oil port and the second oil port, the oil inlet oil way comprises a first oil way and a second oil way, the first oil way is communicated with the second oil way, the first oil way is positioned on the fixed scroll, the second oil way is positioned on the supporting piece and is close to the end part of the movable scroll, and the second oil way penetrates through the surface of the bearing seat and/or the surface of the wear-resisting plate.

7. The scroll compressor of claim 6, wherein the second oil passage includes a first groove section and a second groove section, the first groove section and the second groove section are connected, the first groove section communicates with the first oil passage, the second groove section communicates with the back pressure chamber, a cross-sectional area of the first groove section is smaller than a cross-sectional area of the second groove section, a cross-sectional area of the first groove section is smaller than a cross-sectional area of the first oil passage, and the first groove section is at least partially arranged in an arc shape;

the first groove section is arranged on the wear-resistant plate, and the second groove section is arranged on the bearing seat;

the second channel segment has at least one corner.

8. The scroll compressor of claim 6, wherein the low pressure chamber further comprises a second chamber located between a fixed end plate of the non-orbiting scroll and a discharge cover, the second chamber being located outside of the high pressure chamber, the non-orbiting scroll having a third port in communication with the second chamber and a third oil passage in communication with the third port and the first oil passage;

the third oil way is provided with a throttling section, the throttling section is positioned at one end of the third oil way close to the second cavity, the inner wall of the exhaust cover is provided with a notch, and the notch is opposite to the third oil port;

the first cavity and the second cavity are communicated through a gap between the fixed vortex piece and the exhaust cover; the second cavity is provided with a narrow passageway, and the narrow passageway is positioned between the third oil port and the gap;

the scroll compressor comprises a filter element, wherein the filter element is arranged in the oil return hole, and the filter element is at least partially positioned between the first oil port and the interface of the oil inlet channel and the oil return hole;

the scroll compressor comprises a throttle plug which is arranged in the first oil way, and the throttle plug is positioned between the first oil port and the interface between the third oil way and the first oil way;

the scroll compressor comprises a sealing element, the sealing element is arranged on the fixed end plate, the sealing element is arranged between the fixed end plate and the exhaust cover, the high-pressure cavity is arranged on the inner side of the sealing element, and the second cavity is arranged on the outer side of the sealing element.

9. The scroll compressor of claim 6, wherein the scroll compressor has an oil housing located between the fixed end plate and the discharge cover, the high pressure chamber including a first high pressure chamber located between the oil housing and the discharge cover and a second high pressure chamber located between the fixed end plate and the oil housing, an oil drain of the oil separator communicating with the first high pressure chamber, the discharge opening communicating with the second high pressure chamber, the oil housing having a through hole located beside an inlet of the oil feed passage, the through hole communicating with the first high pressure chamber and the second high pressure chamber;

the movable vortex piece comprises a movable end plate and a movable vortex wall, the movable vortex piece is provided with a first pressure guiding hole, the first pressure guiding hole is communicated with the back pressure cavity, the first pressure guiding hole is arranged at the innermost end of the movable vortex wall along the radial direction of the rotating shaft, the first pressure guiding hole penetrates through the movable vortex piece, and the first pressure guiding hole is provided with an orifice section; the movable vortex piece is provided with a second pressure guiding hole, the second pressure guiding hole is communicated with the back pressure cavity, the second pressure guiding hole is arranged on the movable end plate, the vortex compressor comprises a filter screen, and the filter screen is arranged in the second pressure guiding hole;

the scroll compressor includes a back pressure seal structure including a first back pressure seal located between the movable end plate and the support and a second back pressure seal located between the shaft and the support.

10. The scroll compressor of claim 6, wherein the scroll compressor includes a drive train including a motor mounted in a housing, the motor being located in an intake chamber, the motor being connected to a shaft, the scroll compressor further including a bearing, one end of the shaft being cooperatively connected to a support member by at least one bearing, and the other end being cooperatively connected to the housing by at least one bearing.