EP4299910A1

EP4299910A1 - Compression assembly, fixed scroll, and scroll compressor

Info

Publication number: EP4299910A1
Application number: EP23768771.0A
Authority: EP
Inventors: Junming Cheng; Weiheng LIANG; Wupeng HE; Kang Zhang; Linshu MAO; Lei Liu
Original assignee: Guangdong Midea Environmental Technologies Co Ltd
Current assignee: Guangdong Midea Environmental Technologies Co Ltd
Priority date: 2022-05-17
Filing date: 2023-04-06
Publication date: 2024-01-03
Also published as: WO2023221677A1; CN117108500A

Abstract

Disclosed are a compression assembly (10), a stationary scroll (100), and a scroll compressor (1). The compression assembly (10) includes a stationary scroll (100) and an orbiting scroll (400). The stationary scroll (100) includes a base body (110) provided with a mounting groove, and an end surface of the base body (110) located around the mounting groove opening is a thrust surface (111). The thrust surface (111) includes a first friction region (200) provided with a first oil groove (210) of an annular shape and a second friction region (300) having an oil groove network (310). The oil groove network (310) including a second oil groove (312) and a third oil groove (313). The orbiting scroll (400) is in contact with the thrust surface (111) and has an oiling hole (410), and the oiling hole (410) is in intermittent communication with the first oil groove (210).

Description

CROSS-REFERENCE TO RELATED APPLICATION

The present application claims priority to Chinese Patent Application No. 202210541501.5, filed on May 17, 2022 , the entire disclosure of which is incorporated herein by reference.

FIELD

The present disclosure relates to the field of compressors and, in particular, to a compression assembly, a stationary scroll and a scroll compressor.

BACKGROUND

In the related art, the oil supply mode for the thrust surface of the orbiting and stationary discs is suitable for a compressor structure with a low rotation speed and a small displacement. Since the eccentricity of the orbiting disc of the compressor structure with a small displacement is small, the distance between the edge of the orbiting disc and the oil groove of the stationary disc is short, and the oil in the oil groove of the stationary disc may flow to any position of the thrust surface with the running of the orbiting disc. However, with the development of frequency conversion technology and the further expansion of the application field of the compressor, the rotation speed demand is higher and the displacement demand is larger, and the traditional oil supply and lubrication mode for the thrust surface of the orbiting and stationary discs cannot meet the running reliability requirements of the compressor.

SUMMARY

The present disclosure aims to solve at least one of the technical problems existing in the prior art. To this end, the present disclosure proposes a compression assembly having the advantages of lubricating the thrust surface on the stationary scroll from different positions, improving the lubrication efficiency of the thrust surface, and meeting the lubrication requirements of the high rotation speed compressor.
The present disclosure further provides a stationary scroll having the compression assembly and a scroll compressor having the compression assembly.
According to an embodiment of a first aspect of the present disclosure, a compression assembly is provided. The compression assembly includes a stationary scroll and an orbiting scroll. The stationary scroll includes a base body and a stationary disc molded line, the base body is provided with a mounting groove, and the stationary disc molded line is located in the mounting groove. An end surface of the base body located around the mounting groove opening is a thrust surface which includes a first friction region and a second friction region located radially outside the first friction region, the first friction region has a first oil groove of an annular shape, and the second friction region has an oil groove network. The oil groove network includes a second oil groove of an annular shape and a third oil groove in communication with the second oil groove, and the oil groove network divides the second friction region into a plurality of sub-regions independent from each other. The orbiting scroll is provided on a side of the stationary scroll and in contact with the thrust surface, the orbiting scroll has with an oiling hole opening towards the thrust surface, and the oiling hole is in intermittent communication with the first oil groove. The orbiting scroll has a through hole in communication with the second oil groove, the through hole is adapted to be in communication with a back pressure chamber, and the back pressure chamber is adapted to be located on a side of the orbiting scroll and configured to exert a force on the orbiting scroll towards the thrust surface.
The compression assembly according to the embodiment of the present disclosure has the advantages of lubricating the thrust surface on the stationary scroll from different positions, improving the lubrication efficiency of the thrust surface, and meeting the lubrication requirements of the high rotation speed compressor.
In addition, the compression assembly according to the above-mentioned embodiment of the present disclosure may further have the following additional technical features.
According to some embodiments of the present disclosure, an outer diameter of the first friction region is 1.03 to 1.08 times the outer diameter of the orbiting scroll.
According to some embodiments of the present disclosure, the oil groove network further includes a fourth oil groove of an annular shape, and the fourth oil groove is located radially outside the second oil groove and in communication with the second oil groove through the third oil groove.
In some embodiments, a radial width of the sub-region is L and a running eccentricity of the orbiting scroll is δ, where L ≤ 1.5 * δ; and/or a circumferential angle of the sub-region is θ, where θ≤ 90°.
According to some embodiments of the present disclosure, a radial width of the second oil groove is m, where m ≥ 0.8 mm.
According to some embodiments of the present disclosure, the first oil groove has an oil inlet region in intermittent communication with the oiling hole, and a radial width of the oil inlet region is greater than a radial width of a remaining part of the first oil groove.
In some embodiments, an inner wall of the oil inlet region is inwardly recessed relative to an inner wall of a remaining part of the first oil groove.
According to some embodiments of the present disclosure, the first friction region has a fifth oil groove in communication with the second oil groove.
In some embodiments, the fifth oil groove is provided directly opposite to an oil inlet region of the first oil groove radially.
According to an embodiment of a second aspect of the present disclosure, a stationary scroll having the compression assembly is provided. The stationary scroll includes a base body and a stationary disc molded line, the base body is provided with a mounting groove, and the stationary disc molded line is located in the mounting groove. An end surface of the base body located around the mounting groove opening is a thrust surface which includes a first friction region and a second friction region, the second friction region is located radially outside the first friction region, and the first friction region is provided with a first oil groove of an annular shape. The second friction region has an oil groove network which includes a second oil groove of an annular shape and a third oil groove in communication with the second oil groove, and the oil groove network divides the second friction region into a plurality of sub-regions independent from each other.
In some embodiments, the oil groove network further includes a fourth oil groove of an annular shape, the fourth oil groove is located radially outside a second oil groove, and the fourth oil groove and the second oil groove are communicated through the third oil groove.
According to an embodiment of a third aspect of the present disclosure, a scroll compressor having the compression assembly is provided. The scroll compressor includes the compression assembly according to an embodiment of the first aspect of the present disclosure.
In some embodiments, the scroll compressor includes the stationary scroll according to an embodiment of the second aspect of the present disclosure.
Additional aspects and advantages of the present disclosure will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present disclosure.

BRIEF DESCRIPTION OF DRAWINGS

The foregoing and/or additional aspects and advantages of the present disclosure will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a sectional view of a scroll compressor according to an embodiment of the present disclosure.
FIG. 2 is an enlarged view at position A in FIG. 1.
FIG. 3 is an explanatory view of a friction region in a stationary scroll according to an embodiment of the present disclosure.
FIG. 4 is a schematic view of a structure of a stationary scroll according to an embodiment of the present disclosure.
FIG. 5 is a schematic view of a structure of a stationary scroll according to an embodiment of the present disclosure.
FIG. 6 is a sectional view of an orbiting scroll according to an embodiment of the present disclosure.

Reference numerals: scroll compressor 1, compression assembly 10,

stationary scroll 100, base body 110, thrust surface 111, stationary disc molded line 120,
first friction region 200, first lubricating region 201, second lubricating region 202, first oil groove 210, oil inlet region 220, fifth oil groove 230,
second friction region 300, oil groove network 310, second oil groove 312, third oil groove 313, radial oil groove 313a, fourth oil groove 314, sub-region 320,
orbiting scroll 400, oiling hole 410, fitting groove 420, scroll wrap 430, oil passage hole 440,
back pressure chamber 51, oil sump 52, oiling blade 53, crankshaft 54, oil hole sealing screw 55,
oiling channel 60, lateral oiling channel 61, vertical oiling channel 62.

DESCRIPTION OF EMBODIMENTS

Reference will now be made in detail to the embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are illustrative only, and are intended only to explain the present disclosure and are not to be construed as limiting the present disclosure.
Hereinafter, a compression assembly 10 of a scroll compressor 1 according to an embodiment of the present disclosure will be described with reference to the accompanying drawings.
As shown in FIGS. 1-6, a compression assembly 10 according to an embodiment of the present disclosure includes a stationary scroll 100 and an orbiting scroll 400.
The stationary scroll 100 includes a base body 110 and a stationary disc molded line 120. The base body 110 is provided with a mounting groove, the stationary disc molded line 120 is located in the mounting groove, and the stationary disc molded line 120 and the orbiting scroll 400 cooperating with each other, so that the orbiting scroll 400 can cooperate with the stationary disc molded line 120 to compress air together when rotating.
An end surface of the base body 110 located around the mounting groove opening is a thrust surface 111. The thrust surface 11 includes a first friction region 200 having a first oil groove 210 of an annular shape. It should be noted that, in the present application, "annular" means that the first oil groove 210 extends in a circumferential direction to assume a ring shape, rather than exemplarily defining the first oil groove 210 as a circular annular shape, as long as the first oil groove 210 may extend in a circumferential direction to assume a ring shape, and at this time, the first oil groove 210 may have any shape such as a circular annular shape, a square shape, or an oval shape.
The orbiting scroll 400 is provided on a side of the stationary scroll 100 and in contact with the thrust surface 111, the orbiting scroll 400 has an oiling hole 410 opening towards the thrust surface 111, the oiling hole 410 is in intermittent communication with the first oil groove 210. When the oiling hole 410 is in communication with the first oil groove 210, the lubricating oil may enter the first oil groove 210 through the oiling hole 410. When the orbiting scroll 400 rotates, the orbiting scroll 400 can guide the lubricating oil in the first oil groove 210 to the remaining region of the first friction region 200 to lubricate the first friction region 200.
Exemplarily, the orbiting scroll 400 may rotate relative to the base body 110, and when the orbiting scroll 400 rotates to a certain position, the first oil groove 210 communicates with the oiling hole 410, and at this time, the lubricating oil may enter the first oil groove 210 from the oiling hole 410, to lubricate the first friction region 200, reduce the friction coefficient between the orbiting scroll 400 and the first friction region 200, thereby ensuring smooth rotation of the orbiting scroll 400.
The thrust surface 111 further includes a second friction region 300 located radially outside the first friction region 200, the second friction region 300 has an oil groove network 310, the oil groove network 310 includes a second oil groove 312 of an annular shape and a third oil groove 313 in communication with the second oil groove 312, and the oil groove network 310 divides the second friction region 300 into a plurality of sub-regions 320 independent from each other.
The orbiting scroll 400 has a through hole in communication with the second oil groove 312, the through hole is adapted to be in communication with a back pressure chamber 51, and the lubricating oil in the back pressure chamber 51 can flow into the second oil groove 312 along the through hole. Since the second oil groove 312 communicates with the third oil groove 313, the lubricating oil in the second oil groove 312 may also flow into the third oil groove 313 to increase the area where the lubricating oil may flow in the second friction region 300. Further, when the orbiting scroll 400 rotates, the orbiting scroll 400 can guide the lubricating oil at the second oil groove 312 and the third oil groove 313 to the remaining region of the second friction region 300 to lubricate the second friction region 300.
In some embodiments, the through hole always connects the back pressure chamber 51 to the second oil groove 312, so that the lubricating oil in the back pressure chamber 51 can reach the second oil groove 312 through the through hole at any time, to lubricate the second friction region 300, reduce the friction coefficient between the orbiting scroll 400 and the second friction region 300, thereby ensuring smooth rotation of the orbiting scroll 400.
The back pressure chamber 51 is adapted to be located on a side of the orbiting scroll 400 and configured to exert a force on the orbiting scroll 400 towards the thrust surface 111, so that the orbiting scroll 400 and the thrust surface 111 are always in a compressed state, ensuring the sealing inside the compression assembly 10, ensuring the cooperation between the orbiting scroll 400 and the stationary disc molded line 120, which enables the orbiting scroll 400 to cooperate with the stationary disc molded line 120 when rotating, to compress air.
In some embodiments, the orbiting scroll 400 and the stationary disc molded line 120 define a compression chamber, and when the orbiting scroll 400 rotates, the orbiting scroll 400 can compress air within the compression chamber to enable the scroll compressor 1 to discharge high pressure gas. The compression chamber communicates with the back pressure chamber 51, that is to say, the back pressure chamber 51 has a high pressure gas therein, and the high pressure gas has a force on the orbiting scroll 400 towards the thrust surface 111, so that the orbiting scroll 400 and the thrust surface 111 are always in a pressed state, ensuring the sealing of the compression chamber.
In summary, by providing the first friction region 200 and the second friction region 300 on the thrust surface 111, the lubrication problem in a large range is divided into lubrication in local small regions. The first friction region 200 has the first oil groove 210 and the second friction region 300 has the second oil groove 312 and the third oil groove 313, the lubricating oil may enter the first friction region 200 from the first oil groove 210 to achieve the lubrication of the first friction region 200, and the lubricating oil may enter the second friction region 300 from the second oil groove 312 to achieve the lubrication of the second friction region 300.
By lubricating the thrust surface 111 from different positions, it is possible to reduce the oil-bearing resistance when the orbiting scroll 400 runs, and it is also possible to sufficiently lubricate the whole region of the thrust surface 111, to sufficiently lubricate the thrust surface 111 when the compression assembly 10 is in a relatively harsh operating environment and the friction force and PV value between the thrust surface 111 on the orbiting scroll 400 and the stationary scroll 100 are relatively severe, avoiding abnormal wear of the orbiting scroll 400 and the stationary scroll 100, and serious wear on the whole thrust surface 111.
Therefore, the compression assembly 10 according to the embodiment of the present disclosure has the advantages of lubricating the thrust surface 111 on the stationary scroll 100 from different positions, improving the lubrication efficiency of the thrust surface 111, and meeting the lubrication requirements of the high rotation speed compressor.
A compression assembly 10 according to an exemplarily embodiment of the present disclosure will now be described with reference to the accompanying drawings.
As shown in FIGS. 1-6, a compression assembly 10 according to an embodiment of the present disclosure includes a stationary scroll 100 and an orbiting scroll 400.
In some embodiments of the present disclosure, the orbiting scroll 400 is provided with a scroll wrap 430, the scroll wrap 430 is formed in a spiral structure, and the stationary disc molded line 120 on the stationary scroll 100 is also formed in a spiral structure. The scroll wrap 430 and the stationary disc molded line 120 are engaged with each other to form a crescent-shaped compression chamber, and when the orbiting scroll 400 rotates eccentrically, the volume of the crescent-shaped compression chamber changes continuously and periodically, thereby forming a complete process of suction, compression and exhaust.
In some embodiments, the orbiting scroll 400 and the stationary scroll 100 are made of a metal material, to ensure the strength of the orbiting scroll 400 and the stationary scroll 100, and to ensure that the compression assembly 10 can smoothly compress air, and can form high pressure air.
In some embodiments of the present disclosure, an outer diameter of the first friction region 200 is 1.03 to 1.08 times the outer diameter of the orbiting scroll 400.
In some embodiments, the orbiting scroll 400 may eccentrically rotate relative to the stationary disc molded line 120 of the stationary scroll 100, and the outer diameter of the first friction region 200 is set to be 1.03 to 1.08 times the outer diameter of the orbiting scroll 400, so that the orbiting scroll 400 can guide the lubricating oil at the first oil groove 210 to the respective regions of the first friction region 200 when the orbiting scroll 400 rotates, thereby achieving sufficient lubrication of the first friction region 200.
In some embodiments of the present disclosure, the oil groove network 310 further includes a fourth oil groove 314 of an annular shape, the fourth oil groove 314 is located radially outside a second oil groove 312 and in communication with the second oil groove 312 through the third oil groove 313, and the fourth oil groove 314 is provided to increase the flow area of the lubricating oil at the second friction region 300, thereby facilitating sufficient lubrication of the second friction region 300.
In some embodiments, as shown in FIG. 5, the second oil groove 312 and the fourth oil groove 314 are formed as oil grooves of annular shapes, and the third oil groove 313 includes a plurality of radial oil grooves 313a. Each radial oil grooves 313a can communicate with the second oil groove 312 and the fourth oil groove 314, so that the lubricating oil in the second oil groove 312 can flow into the fourth oil groove 314 along the radial oil grooves 313a to increase an area where the lubricating oil may flow, so that the lubricating oil can be sufficiently brought to the respective regions of the second friction region 300 when the orbiting scroll 400 rotates, thereby achieving sufficient lubrication of the second friction region 300.
In some embodiments of the present disclosure, a radial width of the sub-region 320 is L and a running eccentricity of the orbiting scroll 400 is δ, where L ≤ 1.5 * δ. A second oil groove 312 is provided between the sub-region 320 and the back pressure chamber 51, and the radial width of the sub-region 320 is L, where L ≤ 1.5 * δ. When the orbiting scroll 400 rotates, the orbiting scroll 400 can guide the lubricating oil at the second oil groove 312 to the sub-region 320, and further guide the lubricating oil at the second oil groove 312 to various regions of the second friction region 300, thereby achieving sufficient lubrication of the second friction region 300.
In some embodiments of the present disclosure, a circumferential angle of the sub-region 320 is θ, where θ≤ 90°, to divide the sub-region 320 into a circular arc shape. When the orbiting scroll 400 rotates, the orbiting scroll 400 can guide the lubricating oil at the second oil groove 312 to the sub-region 320, and further guide the lubricating oil at the second oil groove 312 to various regions of the second friction region 300, thereby achieving sufficient lubrication of the second friction region 300.
In some embodiments, as shown in FIG. 5, the oil groove network 310 divides the second friction region 300 into six sub-regions 320 independent from each other, and a circumferential angle of each of sub-regions 320 independent from each other is θ, where θ≤ 90°, to form a circular arc-shaped sub-region 320. The third oil groove 313 is provided between two adjacent sub-regions 320 in a circumferential direction of the second friction region 300, the second oil groove 312 is located inside the sub-region 320, and the fourth oil groove 314 is located outside the sub-region 320.
The lubricating oil in the back pressure chamber 51 may flow from the second oil groove 312 to the fourth oil groove 314 along the third oil groove 313 to sufficiently increase the flow area of the lubricating oil on the second friction region 300, so that when the orbiting scroll 400 rotates, the orbiting scroll 400 can sufficiently guide the lubricating oil at the second oil groove 312, the third oil groove 313, and the fourth oil groove 314 to the sub-region 320 to sufficiently lubricate the sub-region 320 and thus the second friction region 300.
In some embodiments of the present disclosure, a radial width of the second oil groove 312 is m, where m ≥ 0.8 mm, to ensure that the oil in the back pressure chamber 51 may flow into the second oil groove 312 when the orbiting scroll 400 rotates.
In some embodiments of the present disclosure, the first oil groove 210 has an oil inlet region 220 in intermittent communication with the oiling hole 410, and the lubricating oil at the oiling hole 410 may enter the first oil groove 210 from the oil inlet region 220 to lubricate the first friction region 200. A radial width of the oil inlet region 220 is greater than a radial width of a remaining part of the first oil groove 210, to increase the communication time of the oiling hole 410 with the oil inlet region 220, thereby enabling to increase the oil supply amount.
Exemplarily, when the orbiting scroll 400 rotates, the oiling hole 410 rotates together with the orbiting scroll 400, and when the oiling hole 410 rotates to a position corresponding to the oil inlet region 220, the oiling hole 410 communicates with the oil inlet region 220, and at this time, the lubricating oil may enter the oil inlet region 220 from the oiling hole 410 and flow into the first oil groove 210 from the oil inlet region 220.
When the radial width of the oil inlet region 220 is set larger, so that when the orbiting scroll 400 rotates within a certain range, the oil inlet region 220 can continuously communicate with the oiling hole 410, so that the lubricating oil may continuously enter the first oil groove 210 from the oiling hole 410, thereby increasing the oil supply amount to the first oil groove 210 and facilitating sufficient lubrication of the first friction region 200.
In some alternative embodiments of the present disclosure, an inner wall of the oil inlet region 220 is inwardly recessed relative to an inner wall of a remaining part of the first oil groove 210, to increase the radial width of the oil inlet region 220, on the one hand, to smoothly allow the lubricating oil at the oiling hole 410 to flow into the oil inlet region 220, and on the other hand, to facilitate an increase in the communication time of the oil inlet region 220 with the oiling hole 410 and an increase in the oil supply amount to the oil inlet region 220, thereby achieving sufficient lubrication of the first friction region 200.
In some alternative embodiments of the present disclosure, the first friction region 200 has a fifth oil groove 230 in communication with the second oil groove 312, so that the lubricating oil may flow between the second oil groove 312 and the fifth oil groove 230, increasing an area where the lubricating oil may flow on the thrust surface 111, and facilitating sufficient lubrication of the thrust surface 111.
In some alternative embodiments of the present disclosure, the fifth oil groove 230 is provided directly opposite to an oil inlet region 220 of the first oil groove 210 radially, so that the fifth oil groove 230 communicates with the oiling hole 410 when the oil inlet region 220 of the first oil groove 210 communicates with the oiling hole 410 of the orbiting scroll 400. At this time, the lubricating oil may enter the fifth oil groove 230 through the oiling hole 410 and flow from the fifth oil groove 230 to the second oil groove 312 to supply oil to the second friction region 300.
In addition, since the fifth oil groove 230 communicates with the second oil groove 312, the lubricating oil at the fifth oil groove 230 flows into the second oil groove 312, and the second oil groove 312 communicates with the fourth oil groove 314 through the third oil groove 313, that is to say, when the oiling hole 410 communicates with the fifth oil groove 230, the lubricating oil may flow into the fifth oil groove 230 through the oiling hole 410, and from the fifth oil groove 230 to the second oil groove 312, the third oil groove 313 and the fourth oil groove 314, to increase the flow area of the lubricating oil at the second friction region 300, so that the orbiting scroll 400 can sufficiently drive the lubricating oil to lubricate the second friction region 300 when rotating.
In addition, when the lubricating oil flows to the second oil groove 312, since the second oil groove 312 communicates with the back pressure chamber 51 through the through hole, the lubricating oil at the second oil groove 312 may flow into the back pressure chamber 51 through the through hole to supplement the back pressure chamber 51 with the lubricating oil.
As shown in FIG. 3, in the present embodiment, the thrust surface 111 of the stationary scroll 100 is provided with a first friction region 200 and a second friction region 300, the first friction region 200 and the second friction region 300 are formed as annular regions, and the second friction region 300 is located outside the first friction region 200.
As shown in FIG. 4, the first friction region 200 includes a first lubricating region 201 and a second lubricating region 202, and the second lubricating region 202 is located outside the first lubricating region 201. A first oil groove 210 is defined between the first lubricating region 201 and the second lubricating region 202, the lubricating oil may enter the first friction region 200 from inside the first oil groove 210, and when the orbiting scroll 400 rotates, the orbiting scroll 400 can drive the lubricating oil in the first oil groove 210 to lubricate the first lubricating region 201 and the second lubricating region 202, thereby achieving lubrication of the first friction region 200.
As shown in FIG. 4, one point of the first lubricating region 201 is recessed in a direction close to the stationary disc molded line 120 to form an oil inlet region 220 in communication with the first oil groove 210. When the orbiting scroll 400 rotates, the oil inlet region 220 is in intermittent communication with the oiling hole 410 of the orbiting scroll 400, so that the lubricating oil may enter the oil inlet region 220 through the oiling hole 410, so that the lubricating oil may flow from the oil inlet region 220 into the first oil groove 210.
A fifth oil groove 230 is provided at a position corresponding to the oil inlet region 220 in the second lubricating region 202, and the fifth oil groove 230 is recessed in a direction close to the stationary disc molded line 120 in the same direction as the recess of the oil inlet region 220. When the oil inlet region 220 communicates with the oiling hole 410, the fifth oil groove 230 communicates with the oiling hole 410, and the lubricating oil may enter the fifth oil groove 230 from the oiling hole 410.
As shown in FIG. 5, the second friction region 300 includes an oil groove network 310 and a plurality of sub-regions 320 divided by the oil groove network 310, and the oil groove network 310 includes a second oil groove 312, a third oil groove 313, and a fourth oil groove 314. The second oil groove 312 and the fourth oil groove 314 are formed as an oil groove of an annular shape. The third oil groove 313 includes a plurality of radial oil grooves 313a, each of the radial oil grooves 313a is capable of communicating the second oil groove 312 and the fourth oil groove 314, the second oil groove 312 is located outside the second lubricating region 202, and the second oil groove 312 communicates with the fifth oil groove 230.
When the fifth oil groove 230 communicates with the oiling hole 410, the lubricating oil may enter the second oil groove 312 from the fifth oil groove 230, and then flow into the third oil groove 313 and the fourth oil groove 314, so that the lubricating oil may be driven to lubricate the plurality of sub-regions 320 when the orbiting scroll 400 rotates.
A stationary scroll 100 according to an embodiment of the present disclosure is described below. The stationary scroll 100 according to an embodiment of the present disclosure includes a base body 110 and a stationary disc molded line 120, the base body 110 has a mounting groove, the stationary disc molded line 120 is located in the mounting groove, to achieve the positioning of the stationary disc molded line 120, and the stationary disc molded line 120 is mounted on the base body 110.
An end surface of the base body 110 located around the mounting groove opening is a thrust surface 111, and the thrust surface 111 includes a first friction region 200. The first friction region 200 has a first oil groove 210 of an annular shape, and lubricating oil may enter the first friction region 200 from inside the first oil groove 210, thereby achieving lubrication of the first friction region 200.
The thrust surface 111 further includes a second friction region 300 located radially outside the first friction region 200, the second friction region 300 has an oil groove network 310, the oil groove network 310 includes a second oil groove 312 of an annular shape and a third oil groove 313, the third oil groove 313 is in communication with the second oil groove 312, and the lubricating oil may flow in the second oil groove 312 and the third oil groove 313.
The oil groove network 310 divides the second friction region 300 into a plurality of sub-regions 320 independent from each other to divide a larger range of lubricating regions into a smaller range of lubricating regions, to facilitate achieving sufficient lubrication of the second friction region 300.
In some alternative embodiments of the present disclosure, the oil groove network 310 further includes a fourth oil groove 314 of an annular shape, the fourth oil groove 314 is located radially outside a second oil groove 312, the fourth oil groove 314 and the second oil groove 312 are communicated through the third oil groove 313, and the fourth oil groove 314 is provided to increase the flow range of the lubricating oil at the second friction region 300 to facilitate lubrication of the second friction region 300.
In some embodiments, as shown in FIG. 5, the second oil groove 312 and the fourth oil groove 314 are formed as oil grooves of annular shapes, the third oil groove 313 includes a plurality of radial oil grooves 313a, and each radial oil groove 313a can communicate with the second oil groove 312 and the fourth oil groove 314, so that the lubricating oil in the second oil groove 312 can flow into the fourth oil groove 314 along the radial oil grooves 313a to increase an area where the lubricating oil may flow in the second friction region 300, and in further, the lubricating oil can be sufficiently brought to the respective regions of the second friction region 300 when the orbiting scroll 400 rotates.
A scroll compressor 1 according to an embodiment of the present disclosure is described below.
In some embodiments of the present disclosure, the scroll compressor 1 according to an embodiment of the present disclosure includes the compression assembly 10 according to the above-described embodiments of the present disclosure.
In some embodiments, as shown in FIG. 1, a side of the scroll compressor 1 is provided with a compression assembly 10, and the other side of the scroll compressor 1 is provided with an oil sump 52 for storing lubricating oil. A crankshaft 54 is further provided in the scroll compressor 1, and the scroll compressor 1 further has an oiling blade 53 and an oiling channel 60, the oiling channel 60 extends from the crankshaft 54 into the orbiting scroll 400, one end of the oiling channel 60 is in communication with the oil sump 52, and the other end thereof is in communication with the oiling hole 410, the oiling blade 53 is provided in the oiling channel 60, and when the crankshaft 54 rotates, the oiling blade 53 located in the oiling channel 60 may be driven to rotate, at this time, the oiling blade 53 rotates to generate suction to convey the lubricating oil in the oil sump 52 to the oiling channel 60, and the lubricating oil entering the oiling channel 60 may enter the first oil groove 210 and the fifth oil groove 230 through the oiling hole 410.
As shown in FIGS. 1 and 6, in the present embodiment, a side of the orbiting scroll 400 facing the crankshaft 51 has a fitting groove 420, one end of the crankshaft 54 extends into the fitting groove 420 to achieve the connection between the crankshaft 54 and the orbiting scroll 400. When the crankshaft 54 rotates, the orbiting scroll 400 can be driven to rotate eccentrically to compress air. During the rotation, the orbiting scroll 400 may drive the lubricating oil in the first oil groove 210 and the fifth oil groove 230 to lubricate the first friction region 200, and drive the lubricating oil in the second oil groove 312, the third oil groove 313 and the fourth oil groove 314 to lubricate the second friction region 300.
In some alternative embodiments, as shown in FIG. 2, the oiling channel 60 includes a lateral oiling channel 61 and a vertical oiling channel 62 located on a side of the crankshaft 54, that is, below the top wall of the fitting groove 420. The lateral oiling channel 61 is located on the orbiting scroll 400. The top wall of the fitting groove 420 has an oil passage hole 440 communicating the vertical oiling channel 62 and the lateral oiling channel 61.
The oiling blade 53 is located in the vertical oiling channel 62, and the lateral oiling channel 61 communicates the oiling hole 410 and the oil passage hole 440. The lubricating oil in the oil sump 52 enters the vertical oiling channel 62 under the suction generated by the oiling blade 53, then flows into the lateral oiling channel 61 from the oil passage hole 440, then flows from the lateral oiling channel 61 to the oiling hole 410, and then flows to the first oil groove 210 and the fifth oil groove 230 through the oiling hole 410.
An oil hole sealing screw 55 is mounted on a side of the lateral oiling channel 61 away from the vertical oiling channel 62, and the oil hole sealing screw 55 can seal the lubricating oil in the lateral oiling channel 61.
Exemplarily, in order to machine the lateral oiling channel 61 in the orbiting scroll 400, the orbiting scroll 400 may be machined on a side of the orbiting scroll 400 to form the lateral oiling channel 61. At this time, the side of the lateral oiling channel 61 has an opening communicating with the lateral oiling channel 61, and an oil hole sealing screw 55 is provided at the opening to seal the lateral oiling channel 61 to a certain degree to prevent the lubricating oil in the lateral oiling channel 61 from leaking out from the opening.
In addition, the oil hole sealing screw 55 can guide the lubricating oil in the lateral oiling channel 61 to flow towards the oiling hole 410, so that the lubricating oil can enter the thrust surface 111 from the oiling hole 410. The outer diameter dimension of the oil hole sealing screw 55 is smaller than the dimension of the lateral oiling channel 61, facilitating the installation of the oil hole sealing screw 55 in the lateral oiling channel 61.
According to the scroll compressor 1 of the embodiment of the present disclosure, by using the compression assembly 10 according to the above-mentioned embodiment of the present disclosure, the scroll compressor 1 has the advantages of lubricating the thrust surface 111 on the stationary scroll 100 from different positions, improving the lubrication efficiency of the thrust surface 111, and meeting the lubrication requirements of the high rotation speed compressor.
In other embodiments of the present disclosure, a scroll compressor 1 according to an embodiment of the present disclosure includes the stationary scroll 100 according to the above-described embodiment of the present disclosure, and the first friction region 200 is lubricated with lubricating oil in the first oil groove 210 by providing a first friction region 200 and a second friction region 300 on a thrust surface 111 of the stationary scroll 100, providing a first oil groove 210 in the first friction region 200.
The second friction region 300 is divided into a plurality of sub-regions 320 independent from each other by the oil groove network 310, a second oil groove 312 and a third oil groove 313 are provided at the second friction region 300, and the second friction region 300 is lubricated by the lubricating oil in the second oil groove 312 and the third oil groove 313.
Exemplarily, by dividing the lubrication problem in a large range into lubrication in local small regions and lubricating the thrust surface 111 from different positions, on the one hand, it is possible to reduce the oil-bearing resistance when the orbiting scroll 400 runs, and on the other hand, it is possible to lubricate the whole region of the thrust surface 111, so that the lubrication efficiency of the thrust surface 111 by the lubricating oil can be improved, the lubrication requirements of the high rotation speed compressor can be met, and the running reliability of the scroll compressor 1 can be ensured.
Other configurations and operations according to embodiments of the present disclosure are known to those of ordinary skill in the art and will not be described in detail herein.
In the description of the present disclosure, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like designate orientations or positional relationships based on what is shown in the drawings for ease of description and simplicity of description, and not intended or suggested that the device or element referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present disclosure. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present disclosure, unless otherwise specified, the meaning of "a plurality" is two or more. In the description of the present disclosure, a first feature is "above" or "below" a second feature may include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through additional features between them.
In the description of the present disclosure, a first feature is "on", "above" and "on top of" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature.
In the description of the present disclosure, it should be noted that, unless expressly specified or limited otherwise, the terms "mounted", "engaged", and "connected" are to be interpreted broadly, e.g. either fixedly or detachably, or integrally; may be a mechanical connection or an electrical connection; may be directly connected or indirectly connected through an intermediate medium, and may be the communication between two elements. The exemplarily meaning of the above terms in the present disclosure can be understood in detail by those skilled in the art.
In the description of this specification, references to descriptions of the terms "one embodiment", "some embodiments", "exemplary embodiments", "examples", "exemplary examples", or "some examples", etc. mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present disclosure have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to these embodiments without departing from the principles and spirit of the present disclosure, the scope of which is defined by the claims and their equivalents.

Claims

A compression assembly of a scroll compressor, comprising:
a stationary scroll comprising a base body and a stationary disc molded line, the base body having a mounting groove, and the stationary disc molded line being located in the mounting groove, wherein an end surface of the base body located around the mounting groove opening is a thrust surface, the thrust surface comprising a first friction region and a second friction region located radially outside the first friction region, the first friction region having a first oil groove of an annular shape, the second friction region having an oil groove network, the oil groove network comprising a second oil groove of an annular shape and a third oil groove in communication with the second oil groove, and the oil groove network dividing the second friction region into a plurality of sub-regions independent from each other; and

an orbiting scroll provided at a side of the stationary scroll and in contact with the thrust surface, the orbiting scroll having an oiling hole opened towards the thrust surface, the oiling hole being in intermittent communication with the first oil groove, the orbiting scroll having a through hole in communication with the second oil groove, the through hole being adapted to be in communication with a back pressure chamber, and the back pressure chamber being adapted to be located at a side of the orbiting scroll and configured to exert a force on the orbiting scroll towards the thrust surface.
The compression assembly of the scroll compressor according to claim 1, wherein an outer diameter of the first friction region is 1.03 to 1.08 times an outer diameter of the orbiting scroll.
The compression assembly of the scroll compressor according to claim 1, wherein the oil groove network further comprises a fourth oil groove of an annular shape, the fourth oil groove being located radially outside the second oil groove and in communication with the second oil groove through the third oil groove.
The compression assembly of the scroll compressor according to claim 3, wherein:
a radial width of each of the sub-regions is L and a running eccentricity of the orbiting scroll is δ, where L ≤ 1.5 * δ; and/or

a circumferential angle of each of the sub-regions is θ, where θ≤ 90°.
The compression assembly of the scroll compressor according to any one of claims 1 to 4, wherein a radial width of the second oil groove is m, where m ≥ 0.8 mm.
The compression assembly of the scroll compressor according to any one of claims 1 to 5, wherein the first oil groove has an oil inlet region in intermittent communication with the oiling hole, a radial width of the oil inlet region being greater than a radial width of a remaining part of the first oil groove.
The compression assembly of the scroll compressor according to claim 6, wherein an inner wall of the oil inlet region is inwardly recessed relative to an inner wall of the remaining part of the first oil groove.
The compression assembly of the scroll compressor according to any one of claims 1 to 7, wherein the first friction region has a fifth oil groove in communication with the second oil groove.
The compression assembly of the scroll compressor according to claim 8, wherein the fifth oil groove is directly opposite to an oil inlet region of the first oil groove radially.
A stationary scroll of a scroll compressor, comprising: a base body and a stationary disc molded line, wherein:
the base body has a mounting groove, the stationary disc molded line being located in the mounting groove; and

an end surface of the base body located around the mounting groove opening is a thrust surface, the thrust surface comprising a first friction region and a second friction region located radially outside the first friction region, the first friction region having a first oil groove of an annular shape, the second friction region having an oil groove network, the oil groove network comprising a second oil groove of an annular shape and a third oil groove in communication with the second oil groove, and the oil groove network dividing the second friction region into a plurality of sub-regions independent from each other.
The stationary scroll of the scroll compressor according to claim 10, wherein the oil groove network further comprises a fourth oil groove of an annular shape, the fourth oil groove being located radially outside the second oil groove and in communication with the second oil groove through the third oil groove.
A scroll compressor, comprising the compression assembly according to any one of claims 1 to 9.
A scroll compressor, comprising a stationary scroll of the scroll compressor according to claim 10 or 11.