CN112879303A

CN112879303A - Scroll compressor having a plurality of scroll members

Info

Publication number: CN112879303A
Application number: CN201911204313.8A
Authority: CN
Inventors: 邝彦宁; 杨应葵; 任光远; 张庆峰
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2021-06-01

Abstract

The utility model relates to a scroll compressor, including end cover (1), casing (2) and scroll assembly (3), scroll assembly includes driving disk (31) and quiet dish (32) of mutual interlock, be formed with high-pressure chamber (11) between end cover and the quiet dish, inside cavity (21) that are used for holding lubricating oil that have of casing, the driving disk is located between quiet dish and the cavity, be formed with first oil duct (4) with high-pressure chamber intercommunication in the quiet dish, be provided with second oil duct (5) between high-pressure chamber and the cavity, so that lubricating oil in the high-pressure intracavity can flow to the contact position of driving disk and quiet dish through first oil duct, and flow to the cavity through the second oil duct. Through above-mentioned technical scheme, lubricating oil in the high pressure chamber can flow to the contact position of movable disk and quiet dish and the cavity in the casing respectively through first oil duct and second oil duct to other parts that movable disk and quiet dish and lie in the cavity all lubricate, have improved scroll compressor's lubricated effect and life.

Description

Scroll compressor having a plurality of scroll members

Technical Field

The present disclosure relates to the field of compressor technology, and in particular, to a scroll compressor.

Background

The scroll compressor is a compressor of positive displacement compression, and the scroll compressor mainly includes the casing, sets up motor, driving disk and quiet dish in the casing, the motor passes through the bent axle drive driving disk and is eccentric motion around quiet dish, and the in-process of eccentric translation is done at the driving disk, and the gas between driving disk and the quiet dish is compressed. In prior art, the oil circuit design among the scroll compressor can only lubricate the back of driving disk (the one side of the quiet dish that the driving disk deviates from promptly) or the rotational position of bent axle usually, can't lubricate the contact position between driving disk and the quiet dish, and lubricated effect is relatively poor, leads to the operating device durability among the scroll compressor not good.

Disclosure of Invention

The utility model aims at providing a scroll compressor, this scroll compressor not only can lubricate the back of driving disk, can also lubricate the contact position between driving disk and the quiet dish, and is lubricated effectual, can improve scroll compressor's life effectively.

In order to achieve the above purpose, the present disclosure provides a scroll compressor, including end cover, casing and scroll assembly, scroll assembly includes movable disk and the quiet dish of mutual interlock, the end cover with be formed with the high pressure chamber between the quiet dish, the inside cavity that is used for holding lubricating oil that has of casing, the movable disk is located the quiet dish with between the cavity, be formed with in the quiet dish with the first oil duct of high pressure chamber intercommunication, the high pressure chamber with be provided with the second oil duct between the cavity, so that lubricating oil in the high pressure intracavity can pass through first oil duct flow direction the movable disk with the contact position of quiet dish, and pass through the second oil duct flow direction the cavity.

Optionally, the static disc comprises a static disc base and a static disc molded line formed on the static disc base, the high-pressure cavity is formed between the static disc base and the end cover, the end face of the static disc molded line is attached to the movable disc, and the first oil duct is formed in the static disc base and the static disc molded line and located at the bottom of the static disc, so that lubricating oil in the high-pressure cavity flows to the attached position of the static disc molded line and the movable disc through the first oil duct.

Optionally, the static disc includes the static disc base and follows the outer fringe orientation of static disc base is close to the static disc outer wall that the direction of cavity extends, the static disc base with form between the end cover the high pressure chamber, the second oil duct is including forming first oil return channel in static disc base and the static disc outer wall, first oil return channel is located the bottom of static disc, just first oil return channel's one end with the high pressure chamber intercommunication, the other end with the cavity intercommunication.

Optionally, a supporting disk for supporting a crankshaft is arranged in the machine shell or integrally formed, the movable disk is located between the static disk and the supporting disk, the crankshaft penetrates through the supporting disk and is connected with the movable disk, the cavity comprises a low-pressure cavity formed between the movable disk and the supporting disk, the second oil duct further comprises a second oil return channel, an oil return groove is formed in the end face of the supporting disk, the movable disk and the oil return groove jointly define the second oil return channel, one end of the second oil return channel is communicated with the first oil return channel, and the other end of the second oil return channel is communicated with the low-pressure cavity.

Optionally, the scroll compressor further comprises a first bearing, a second bearing and an eccentric weight, the first bearing is located between the crankshaft and the supporting disk, the second bearing is located between the crankshaft and the moving disk, the low pressure cavity is formed between the supporting disk, the moving disk, the end surface of the first bearing and the end surface of the second bearing, and the eccentric weight is installed on the crankshaft and accommodated in the low pressure cavity.

Optionally, the chamber further includes a casing oil sump communicated with the low pressure chamber, a through hole is formed on the support plate, and the casing oil sump is communicated with a suction passage of the scroll assembly through the through hole.

Optionally, the scroll compressor further includes a throttling device located in the high-pressure cavity, and one end of the first oil passage and one end of the second oil passage are both communicated with the high-pressure cavity through the throttling device.

Optionally, the throttling device includes a valve plate and a pressing plate, a first through hole, a second through hole and a long hole are formed in the valve plate, the long hole is formed into a serpentine structure, two ends of the long hole are communicated with the first through hole and the second through hole respectively, the valve plate is clamped between the pressing plate and the static disc, so that the pressing plate, the long hole and the static disc define a throttling channel together, an oil inlet hole communicated with the first through hole is formed in the pressing plate, the high-pressure cavity passes through the oil inlet hole and communicated with the first through hole, the pressing plate is sealed, the second through hole is close to one side of the high-pressure cavity, one end of the first oil duct and one end of the second oil duct are communicated with the second through hole.

Optionally, a filtering device is arranged at a communication position of the throttling device and the high-pressure cavity.

Optionally, an exhaust passage is formed on the static disc, a compression cavity is formed between the movable disc and the static disc, one end of the exhaust passage is communicated with the compression cavity, and the other end of the exhaust passage is communicated with the high-pressure cavity.

Through above-mentioned technical scheme, when scroll compressor during operation, the eccentric translation is done around quiet dish to the driving disk for oil-gas mixture between driving disk and the quiet dish is compressed, and oil-gas mixture after the compression gets into the high-pressure chamber, and in the high-pressure chamber, lubricating oil and gas in the oil-gas mixture are separated because of its dead weight difference. Because be provided with first oil duct and the second oil duct with the high-pressure chamber intercommunication among the scroll compressor that this disclosure provided, make lubricating oil in the high-pressure chamber can flow to the contact position of driving disk and quiet dish respectively through first oil duct and second oil duct, and in the cavity in the casing, thereby can make lubricating oil to the contact position of driving disk and quiet dish, one side that the driving disk is close to the cavity, and be located other parts in the cavity and all lubricate, and then reduce the wearing and tearing of driving disk and quiet dish, scroll compressor's lubricated effect and life have been improved effectively.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

FIG. 1 is a top view of a scroll compressor provided by an exemplary embodiment of the present disclosure;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a cross-sectional view of a stationary plate of a scroll compressor provided in accordance with an exemplary embodiment of the present disclosure, wherein a valve plate of a throttle device is also shown;

FIG. 4 is a bottom view of a stationary plate of a scroll compressor provided in accordance with an exemplary embodiment of the present disclosure, wherein a valve plate of a throttle device is also shown;

FIG. 5 is an exploded view of a throttle device of a scroll compressor provided in accordance with an exemplary embodiment of the present disclosure, wherein a filter device is also shown;

FIG. 6 is a top view of the shell of a scroll compressor provided in accordance with an exemplary embodiment of the present disclosure;

FIG. 7 is a top view of a shell and a movable scroll plate of a scroll compressor provided by an exemplary embodiment of the present disclosure;

FIG. 8 is a partial cross-sectional view of a scroll compressor provided in accordance with an exemplary embodiment of the present disclosure, wherein the dashed arrows indicate the flow path and direction of the lubricant oil in the scroll compressor.

Description of the reference numerals

1-end cap; 11-a high pressure chamber; 2-a housing; 21-a chamber; 211-low pressure chamber; 212-shell oil sump; 22-a support disk; 221-oil return groove; 222-a via hole; 3-a scroll assembly; 31-a moving disk; 311-moving disk base; 312-moving disc profile; 32-a stationary disc; 321-a stationary disc base; 322-static disc type line; 323-outer wall of stationary disc; 33-an aspiration channel; 34-an exhaust channel; 35-a compression chamber; 4-a first oil passage; 5-a second oil passage; 51-a first oil return channel; 52-a second oil return passage; 6-a throttling device; 61-valve plate; 611 — a first through hole; 612-a second via; 613-long hole; 62-a press plate; 7-a filtration device; 81-crankshaft; 82-a first bearing; 83-a second bearing; 84-eccentric weight; 9-fastening piece.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, the use of directional terms such as "inner and outer" refers to the inner and outer of the corresponding structural profile unless otherwise indicated.

As shown in fig. 1 to 8, the present disclosure provides a scroll compressor, which may be used in a vehicle air conditioning system, wherein the scroll compressor includes an end cover 1, a casing 2 and a scroll assembly 3, the scroll assembly 3 includes a movable plate 31 and a stationary plate 32 engaged with each other, a high pressure chamber 11 is formed between the end cover 1 and the stationary plate 32, a chamber 21 for accommodating lubricating oil is provided inside the casing 2, the movable plate 31 is located between the stationary plate 32 and the chamber 21, a first oil passage 4 communicated with the high pressure chamber 11 is formed in the stationary plate 32, and a second oil passage 5 is provided between the high pressure chamber 11 and the chamber 21, so that the lubricating oil in the high pressure chamber 11 can flow to a contact position of the movable plate 31 and the stationary plate 32 through the first oil passage 4, and flow to the chamber 21 through the second oil passage 5.

Through the technical scheme, when the scroll compressor works, the movable disc 31 performs eccentric translation around the static disc 32, so that the oil-gas mixture between the movable disc 31 and the static disc 32 is compressed, the compressed oil-gas mixture enters the high-pressure cavity 11, and in the high-pressure cavity 11, lubricating oil and gas in the oil-gas mixture are separated due to different dead weights of the lubricating oil and the gas. Because the scroll compressor that this disclosure provided is provided with first oil duct 4 and second oil duct 5 with high-pressure chamber 11 intercommunication in for lubricating oil in the high-pressure chamber 11 can flow to the contact position of movable disk 31 and static dish 32 respectively through first oil duct 4 and second oil duct 5, and in the cavity 21 in the casing 2, thereby can make lubricating oil all lubricate the contact position of movable disk 31 and static dish 32, one side that movable disk 31 is close to cavity 21, and be located the other parts in cavity 21, and then reduce the wearing and tearing of movable disk 31 and static dish 32, the lubrication effect and the life of scroll compressor have been improved effectively.

On the one hand, in order to lubricate the contact position between the movable disc 31 and the fixed disc 32, in an embodiment provided by the present disclosure, as shown in fig. 2 and 3, the fixed disc 32 includes a fixed disc base 321 and a fixed disc molded line 322 formed on the fixed disc base 321, a high pressure cavity 11 is formed between the fixed disc base 321 and the end cover 1, the end surface of the fixed disc molded line 322 is attached to the movable disc 31, and a first oil passage 4 is formed in the fixed disc base 321 and the fixed disc molded line 322 and located at the bottom of the fixed disc 32, so that the lubricating oil in the high pressure cavity 11 flows to the attachment position between the fixed disc molded line 322 and the movable disc 31 through the first oil passage 4. When the oil-gas mixture separates in the high-pressure chamber 11, because the dead weight of lubricating oil is bigger, lubricating oil will gather and flow to the laminating department of the terminal surface of quiet dish molded lines 322 and the movable disk base 311 of movable disk 31 at the bottom of high-pressure chamber 11 through the first oil duct 4 that is located quiet dish 32 bottom, like this, when movable disk 31 does eccentric translation, the contact position of movable disk base 311 and quiet dish molded lines 322 can be lubricated to reduce the frictional force between quiet dish molded lines 322 and the movable disk 31, and then reduce wearing and tearing.

In another embodiment provided by the present disclosure, the end surface of the movable disc molded line 312 may be attached to the fixed disc base 321, the first oil passage 4 may also be formed in the fixed disc base 321 and located at the bottom of the fixed disc 32, one end of the first oil passage 4 is communicated with the high pressure chamber 11, and the other end is opposite to the end surface of the movable disc molded line 312 of the movable disc 31, so that the lubricating oil may flow to the attachment position of the end surface of the movable disc molded line 312 and the fixed disc base 321 through the first oil passage 4, and thus, when the movable disc 31 performs eccentric translation, the contact position of the movable disc molded line 312 and the fixed disc base 321 may be lubricated, thereby reducing wear between the fixed disc molded line 322 and the movable disc 31.

In still another embodiment provided by the present disclosure, the number of the first oil passage 4 may be two, one first oil passage 4 lubricates a joint between the end surface of the stationary disc molded line 322 and the movable disc base 311, and the other first oil passage 4 lubricates a joint between the stationary disc base 321 and the end surface of the movable disc molded line 312.

On the other hand, as shown in fig. 2 and 3, in order to enable the lubricating oil to flow into the chamber 21 in the housing 2 through the second oil passage 5, in an embodiment provided by the present disclosure, the stationary disc 32 includes a stationary disc base 321 and a stationary disc outer wall 323 extending from an outer edge of the stationary disc base 321 toward a direction close to the chamber 21, the stationary disc base 321 and the end cover 1 form the high pressure chamber 11 therebetween, the second oil passage 5 includes a first oil return passage 51 formed in the stationary disc base 321 and the stationary disc outer wall 323, the first oil return passage 51 is located at a bottom of the stationary disc 32, and one end of the first oil return passage 51 communicates with the high pressure chamber 11 and the other end communicates with the chamber 21. Since the stationary disc outer wall 323 extends from the outer edge of the stationary disc base 321 toward the chamber 21, providing the first oil return passage 51 in the stationary disc outer wall 323 allows the lubricating oil to flow into the chamber 21 through the first oil return passage 51 to lubricate the components in the chamber 21.

Further, as shown in fig. 2 and 6, a supporting plate 22 for supporting the crankshaft 81 is disposed or integrally formed in the housing 2, the movable plate 31 is located between the stationary plate 32 and the supporting plate 22, the crankshaft 81 penetrates through the supporting plate 22 and is connected to the movable plate 31 to drive the movable plate 31 to perform eccentric translation, the chamber 21 includes a low pressure chamber 211 formed between the movable plate 31 and the supporting plate 22, the second oil passage 5 further includes a second oil return passage 52, an oil return groove 221 is formed in an end surface of the supporting plate 22, the movable plate 31 and the oil return groove 221 together define a second oil return passage 52, one end of the second oil return passage 52 is communicated with the first oil return passage 51, and the other end of the second oil return passage is communicated with the low pressure chamber 211. Thus, the lubricating oil in the high-pressure cavity 11 can sequentially flow into the low-pressure cavity 211 through the first oil return passage 51 and the second oil return passage 52, and because the low-pressure cavity 211 is formed between the movable disk 31 and the support disk 22, the lubricating oil in the low-pressure cavity 211 can lubricate the back of the movable disk 31 (namely, the side of the movable disk 31 facing the low-pressure cavity 211), so that the friction force of the movable disk 31 in the eccentric translation process is reduced, and the wear loss of the movable disk 31 is reduced.

Optionally, as shown in fig. 2, the scroll compressor further includes a first bearing 82, a second bearing 83, and an eccentric weight 84, the first bearing 82 being located between the crankshaft 81 and the support plate 22 to enable the crankshaft 81 to rotate relative to the support plate 22, and the second bearing 83 being located between the crankshaft 81 and the movable plate 31 to enable relative rotation between the crankshaft 81 and the movable plate 31. Wherein, form low pressure chamber 211 between the terminal surface of supporting disk 22, driving disk 31, first bearing 82, and second bearing 83, eccentric counterbalance 84 is installed on bent axle 81 and is held in low pressure chamber 211, like this, when eccentric counterbalance 84 rotates along with bent axle 81, eccentric counterbalance 84 will hit the lubricating oil in hitting low pressure chamber 211, makes the lubricating oil in low pressure chamber 211 splash, thereby lubricate one side, first bearing 82, second bearing 83 of driving disk 31 orientation low pressure chamber 211, improve the lubricated effect of lubricating oil to scroll compressor.

In addition, in order to make the lubricant oil circulate in the scroll compressor, as shown in fig. 2, 6 and 7, the chamber 21 further includes a housing oil pool 212 communicated with the low pressure chamber 211, a through hole 222 is formed on the support plate 22, and the housing oil pool 212 is communicated with the suction passage 33 of the scroll assembly 3 through the through hole 222, so that when the scroll compressor sucks air, the lubricant oil mist in the housing oil pool 212 can pass through the through hole 222 into the suction passage 33 under the action of suction pressure, and then enter between the movable plate 31 and the stationary plate 32, and is compressed together with the gas sucked by the scroll compressor and then discharged into the high pressure chamber 11. Here, the through hole 222 may be formed as a kidney-shaped hole extending along the circumferential direction of the support disc 22, and the through hole 222 may be plural, and the plural through holes 222 are arranged at intervals along the circumferential direction of the support disc 22 to ensure that the lubricating oil mist can be continuously sucked from the housing oil sump 212 during the eccentric translation of the movable disc 31.

Alternatively, the low pressure chamber 211 and the casing sump 212 may be in communication by various embodiments. For example, in an embodiment in which the first bearing 82 is provided between the crankshaft 81 and the support plate 22, the lubricating oil in the low pressure chamber 211 may flow into the casing oil sump 212 through a gap between an outer race of the first bearing 82 and a rolling body (e.g., a ball, a roller, or the like), or the lubricating oil may flow into the casing oil sump 212 through a gap between the components by providing a gap between the low pressure chamber 211 and the casing oil sump 212. In other embodiments, a passage may be formed in support plate 22 in communication with housing sump 212 for passage of lubricating oil.

Further, as shown in fig. 2 and 3, in order to enable the oil-gas mixture between the movable disc 31 and the stationary disc 32 to be discharged into the high pressure chamber 11 after being compressed, an exhaust passage 34 is formed on the stationary disc 32, a compression chamber 35 is formed between the movable disc 31 and the stationary disc 32, one end of the exhaust passage 34 is communicated with the compression chamber 35, and the other end is communicated with the high pressure chamber 11. Here, the compression cavity 35 between the movable platen 31 and the stationary platen 32 is a lunar pressure cavity with gradually reduced volume formed after the stationary platen profile 322 and the movable platen profile 312 are engaged with each other, the oil-gas mixture entering the compression cavity 35 from the air suction channel 33 and the lubricating oil flowing to the contact position of the movable platen 31 and the stationary platen 32 through the first oil passage 4 and entering the compression cavity 35 are compressed continuously in the process of eccentric translation of the movable platen 31, finally, the high-temperature and high-pressure oil-gas mixture is formed and discharged into the high-pressure cavity 11 from the exhaust channel 34, in the high-pressure cavity 11, the oil-gas mixture is separated, the gas is discharged through an exhaust port of the scroll compressor, and the lubricating oil enters the contact position of the movable platen 31 and the stationary platen 32 and the cavity 21 in the casing 2 through the first oil passage 4 and the second oil passage 5, so that the lubricating oil is recycled and flows circularly.

In one embodiment provided by the present disclosure, as shown in fig. 2, the scroll compressor further includes a throttle device 6 located in the high-pressure chamber 11, and one end of the first oil passage 4 and one end of the second oil passage 5 are both communicated with the high-pressure chamber 11 through the throttle device 6. On one hand, the throttling device 6 can throttle and reduce the pressure of the lubricating oil which is about to enter the first oil passage 4 and the second oil passage 5, so that the lubricating oil is prevented from being too high in pressure to influence the eccentric rotation of the movable disc 31 or damage parts in the machine shell 2, on the other hand, gas in the lubricating oil can be separated out, and the gas in the high-pressure cavity 11 is prevented from entering a compression cavity 35 formed between the movable disc 31 and the static disc 32 and a cavity 21 in the machine shell 2 through the first oil passage 4 and the second oil passage 5 respectively. When the scroll compressor is used in an air conditioning system of a vehicle, gaseous refrigerant is prevented from entering a compression chamber 35 formed between the movable platen 31 and the stationary platen 32 and a chamber 21 in the casing 2, thereby preventing the performance of the air conditioning system from being affected by refrigerant leakage.

Further, as an exemplary embodiment, as shown in fig. 3 to 5, the throttling device 6 may include a valve plate 61 and a pressure plate 62, the valve plate 61 is formed with a first through hole 611, a second through hole 612, and an elongated hole 613, the elongated hole 613 is formed in a serpentine structure, both ends of the elongated hole 613 are respectively communicated with the first through hole 611 and the second through hole 612, the valve plate 61 is sandwiched between the pressure plate 62 and the stationary disk 32 such that the pressure plate 62, the elongated hole 613, and the stationary disk 32 collectively define a throttling passage, an oil inlet (not shown) communicated with the first through hole 611 is formed on the pressure plate 62, the high pressure chamber 11 is communicated with the first through hole 611 through the oil inlet, the pressure plate 62 closes a side of the second through hole 612 close to the high pressure chamber 11, and both ends of the first oil passage 4 and the second oil passage 5 are communicated with the second through hole 612. Since the long hole 613 is formed in a serpentine structure, the cross section of the throttle passage defined by the pressure plate 62, the long hole 613 and the stationary disk 32 together is also serpentine, so that the flow speed and the pressure of the lubricating oil can be reduced during the flowing process in the throttle passage.

Here, since the valve sheet 61 is located between the pressure plate 62 and the stationary plate 32, the oil inlet hole formed in the pressure plate 62 can communicate the first through hole 611 with the high pressure chamber 11, thereby allowing the lubricating oil in the high pressure chamber 11 to flow into the throttle passage. One side of the second through hole 612 close to the high-pressure chamber 11 is blocked by the pressure plate 62, so that the second through hole 612 and the pressure plate 62 jointly define a semi-through groove, and thus, lubricating oil flowing out of the throttling channel can only enter the first oil passage 4 and the second oil passage 5 and cannot flow back to the high-pressure chamber 11. When the valve plate 61 and the pressure plate 62 are assembled, the valve plate 61 may be assembled on the stationary plate 32, the second through hole 612 is opposite to the first oil channel 4 and the second oil channel 5, the pressure plate 62 is installed on the valve plate 61, and finally the fastening member 9 sequentially penetrates through the pressure plate 62, the valve plate 61 and the stationary plate 32 to fasten the pressure plate 62 and the valve plate 61 on the stationary plate 32.

In other embodiments, the throttling device 6 may be a throttling valve, a slit with a gradually decreasing cross section formed on the stationary disk 32, or the like, and the present disclosure does not limit the type of the throttling device 6 as long as the throttling and pressure reducing effects can be achieved.

In addition, in order to avoid impurities from entering the scroll group and the inside of the casing 2 through the first oil passage 4 and the second oil passage 5, in an embodiment provided by the present disclosure, a filtering device 7 may be disposed at a communication position between the throttling device 6 and the high pressure chamber 11, so that the lubricating oil in the high pressure chamber 11 is filtered by the filtering device 7 and then enters the throttling device 6 for throttling and depressurizing. Here, the filtering device 7 may be a filter net, a filter element, or the like, which can achieve a filtering effect, and the present disclosure does not limit the specific type of the filtering device 7.

For embodiments in which the throttling device 6 is a pressure plate 62 and a valve plate 61, the filter device 7 may be mounted on the pressure plate 62, and the outlet of the filter device 7 communicates with the oil inlet on the pressure plate 62.

Hereinafter, the operation principle and the flow path of the lubricating oil of the scroll compressor provided by the present disclosure will be described in detail with reference to the embodiments shown in fig. 2 and 8.

As shown in fig. 2, when the scroll compressor is in operation, the motor drives the moving disc 31 to make eccentric translation through the crankshaft 81, during the eccentric translation of the moving disc 31, a lunar pressure chamber (i.e. a compression chamber 35) with a gradually reduced volume is formed between the moving disc profile 312 and the stationary disc profile 322, an oil-gas mixture (e.g. a refrigerant) sucked into the compression chamber 35 from the suction channel 33 of the scroll group is continuously compressed in this process, and finally, the oil-gas mixture with high temperature and high pressure is discharged from the discharge channel 34 on the stationary disc 32, thereby completing the suction, compression and discharge of the scroll compressor.

As shown in fig. 8, the oil-gas mixture discharged from the exhaust passage 34 of the stationary disc 32 is subjected to gas-liquid separation in the high-pressure chamber 11, and the lubricating oil is collected at the bottom of the high-pressure chamber 11, sequentially filtered by the filter device 7 and the throttle device 6, depressurized, and then respectively introduced into the first oil passage 4 and the second oil passage 5. The lubricating oil in the first oil passage 4 flows into the joint between the end surface of the static disc molded line 322 and the movable disc base 311 to lubricate the joint, so as to reduce the wear loss of the scroll group, and the lubricating oil after lubricating the joint between the end surface of the static disc molded line 322 and the movable disc base 311 flows into the compression cavity 35, is compressed together with the gas entering the compression cavity 35, and returns to the high pressure cavity 11 again through the exhaust passage 34 on the static disc 32. The lubricating oil in the second oil passage 5 flows into the low-pressure chamber 211 first, and the eccentric weight 84 flies the lubricating oil in the low-pressure chamber 211 in the process of rotating along with the crankshaft 81, so that the lubricating oil splashes to the back of the movable disk 31, the first bearing 82 and the second bearing 83, and the back of the movable disk 31, the first bearing 82 and the second bearing 83 are lubricated, so that the eccentric flat rotation of the movable disk 31 is smoother, and the wear loss of the movable disk 31, the crankshaft 81 and surrounding parts is reduced. The lubricating oil in the low-pressure chamber 211 flows into the casing oil sump 212 through a gap between the components between the low-pressure chamber 211 and the casing oil sump 212, for example, a gap between the outer race of the first bearing 82 and the rotating body thereof. Lubricating oil in the shell oil pool 212 enters the suction channel 33 of the scroll group through the through hole 222 on the supporting disc 22 under the action of the suction pressure of the scroll compressor, further enters the compression cavity 35 between the movable disc 31 and the static disc 32, and finally returns to the high-pressure cavity 11 through the exhaust channel 34 on the static disc 32, so that the circulating flow of the lubricating oil is realized.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. The scroll compressor is characterized by comprising an end cover (1), a shell (2) and a scroll assembly (3), wherein the scroll assembly (3) comprises a movable disc (31) and a fixed disc (32) which are mutually meshed, a high-pressure cavity (11) is formed between the end cover (1) and the fixed disc (32), a cavity (21) for containing lubricating oil is arranged inside the shell (2), the movable disc (31) is positioned between the fixed disc (32) and the cavity (21), a first oil channel (4) communicated with the high-pressure cavity (11) is formed in the fixed disc (32), a second oil channel (5) is arranged between the high-pressure cavity (11) and the cavity (21) so that the lubricating oil in the high-pressure cavity (11) can flow to the contact position of the movable disc (31) and the fixed disc (32) through the first oil channel (4), and flows to the chamber (21) through the second oil passage (5).

2. The scroll compressor of claim 1, wherein the fixed disc (32) comprises a fixed disc base (321) and a fixed disc molded line (322) formed on the fixed disc base (321), the high-pressure cavity (11) is formed between the fixed disc base (321) and the end cover (1), the end surface of the fixed disc molded line (322) is attached to the movable disc (31), and the first oil passage (4) is formed in the fixed disc base (321) and the fixed disc molded line (322) and located at the bottom of the fixed disc (32), so that the lubricating oil in the high-pressure cavity (11) flows to the attachment of the fixed disc molded line (322) and the movable disc (31) through the first oil passage (4).

3. The scroll compressor according to claim 1, wherein the stationary platen (32) includes a stationary platen base (321) and a stationary platen outer wall (323) extending from an outer edge of the stationary platen base (321) toward a direction close to the chamber (21), the high pressure chamber (11) is formed between the stationary platen base (321) and the end cover (1), the second oil passage (5) includes a first oil return passage (51) formed in the stationary platen base (321) and the stationary platen outer wall (323), the first oil return passage (51) is located at a bottom of the stationary platen (32), and one end of the first oil return passage (51) communicates with the high pressure chamber (11) and the other end communicates with the chamber (21).

4. The scroll compressor according to claim 3, wherein a support plate (22) for supporting a crankshaft (81) is disposed in or integrally formed in the housing (2), the movable platen (31) is located between the stationary platen (32) and the support plate (22), the crankshaft (81) passes through the support plate (22) and is connected to the movable platen (31), the chamber (21) includes a low pressure chamber (211) formed between the movable platen (31) and the support plate (22), the second oil passage (5) further includes a second oil return passage (52), an oil return groove (221) is formed on an end surface of the support plate (22), the movable platen (31) and the oil return groove (221) together define the second oil return passage (52), and one end of the second oil return passage (52) is communicated with the first oil return passage (51), the other end is communicated with the low-pressure cavity (211).

5. The scroll compressor of claim 4, further comprising a first bearing (82), a second bearing (83), and an eccentric weight (84), the first bearing (82) being located between the crankshaft (81) and the support disk (22), the second bearing (83) being located between the crankshaft (81) and the movable disk (31), the support disk (22), the movable disk (31), an end surface of the first bearing (82), and an end surface of the second bearing (83) forming the low pressure chamber (211), the eccentric weight (84) being mounted on the crankshaft (81) and received in the low pressure chamber (211).

6. The scroll compressor of claim 4, wherein the chamber (21) further comprises a casing oil sump (212) in communication with the low pressure chamber (211), a through hole (222) being formed in the support disk (22), the casing oil sump (212) being in communication with a suction passage (33) of the scroll assembly (3) through the through hole (222).

7. The scroll compressor according to claim 1, further comprising a throttle device (6) located in the high-pressure chamber (11), wherein one end of the first oil passage (4) and one end of the second oil passage (5) are both communicated with the high-pressure chamber (11) through the throttle device (6).

8. The scroll compressor according to claim 7, wherein the throttling device (6) comprises a valve plate (61) and a pressure plate (62), the valve plate (61) is formed with a first through hole (611), a second through hole (612) and a long hole (613), the long hole (613) is formed in a serpentine structure, two ends of the long hole (613) are respectively communicated with the first through hole (611) and the second through hole (612), the valve plate (61) is clamped between the pressure plate (62) and the static disc (32) so that the pressure plate (62), the long hole (613) and the static disc (32) jointly define a throttling channel, an oil inlet hole communicated with the first through hole (611) is formed on the pressure plate (62), the high pressure chamber (11) is communicated with the first through hole (611) through the oil inlet hole, the pressure plate (62) seals one side of the second through hole (612) close to the high pressure chamber (11), one end of the first oil channel (4) and one end of the second oil channel (5) are both communicated with the second through hole (612).

9. A scroll compressor according to claim 7, wherein the connection of the throttling means (6) to the high pressure chamber (11) is provided with a filtering means (7).

10. The scroll compressor according to any one of claims 1 to 9, wherein a discharge passage (34) is formed in the stationary disc (32), a compression chamber (35) is formed between the movable disc (31) and the stationary disc (32), and one end of the discharge passage (34) communicates with the compression chamber (35) and the other end communicates with the high pressure chamber (11).