Oil storage lubricating mechanism of scroll compressor and scroll compressor

Abstract

The invention discloses a scroll compressor oil storage lubricating mechanism, which comprises an eccentric shaft, a cross slip ring, a movable scroll plate and a main bearing seat, the main bearing seat is provided with a thrust surface and a key groove for the cross slip ring to slide, the thrust surface is provided with an annular oil path, and the bottom surface of the annular oil path is provided with a lubricating oil path communicated with the key groove; the eccentric shaft, the main bearing seat and the movable scroll plate form an oil storage cavity, lubricating oil enters the oil storage cavity through the oil supply channel, the bottom surface of the movable scroll plate is a contact surface, and when the eccentric shaft operates, the lubricating oil in the oil storage cavity lubricates the contact surface and the thrust surface of the movable scroll plate. In addition, an annular oil way and a lubricating oil way are formed in the main bearing seat, and when the height of lubricating oil in the oil storage cavity is higher than the bottom face of the annular oil way, the oil lubricates the key groove and the cross-shaped sliding ring through the lubricating oil way.

Description

Technical Field

[0001] The present invention belongs to the technical field of scroll compressors, and in particular relates to an oil storage and lubrication mechanism for a scroll compressor and a scroll compressor. Background Art

[0002] Variable-frequency scroll compressors can vary their speed over a wide range, making them suitable for a variety of applications. When the compressor is running at high speed, the orbiting scroll and the main bearing seat thrust surface generate significant heat, causing the oil viscosity to decrease, worsening the lubrication of the friction pair and increasing wear. At low speeds, insufficient oil supply can cause wear on the orbiting scroll and the main bearing seat thrust surface. When the compressor is started, especially when it needs to quickly reach high speeds, the delay in oil supply can cause wear on the orbiting scroll and the main bearing seat thrust surface.

[0003] Existing scroll compressors usually have an oil supply channel on the end plate of the movable scroll. For example, application number CN202223378062.5 discloses a scroll compressor in which an oil supply channel is provided on the end plate of the movable scroll, which cooperates with the oil supply groove on the thrust plate to lubricate the thrust surface. However, the end plate of the movable scroll needs to be processed, which affects the processing efficiency of the movable scroll and also affects its strength. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention discloses an oil storage and lubrication mechanism for a scroll compressor and a scroll compressor. When the eccentric shaft rotates at a relatively high speed, the oil storage cavity is full of oil, and the contact surface and thrust surface of the movable scroll are fully lubricated; when the eccentric shaft rotates at a relatively low speed, the oil storage cavity is not full of oil, and the eccentric shaft splashes the lubricating oil in the oil storage cavity to the contact surface of the movable scroll to lubricate the thrust surface. In addition, an annular oil circuit and a lubricating oil circuit are opened on the main bearing seat. When the height of the lubricating oil in the oil storage cavity is higher than the bottom surface of the annular oil circuit, the oil lubricates the keyway and the cross slip ring through the lubricating oil circuit.

[0005] On the one hand, the present invention discloses an oil storage and lubrication mechanism for a scroll compressor, comprising an eccentric shaft, an Oldham ring, an orbiting scroll, and a main bearing seat, wherein the main bearing seat has a thrust surface and a keyway for sliding the Oldham ring, an annular oil passage is formed on the thrust surface, and a lubricating oil passage is provided on the bottom surface of the annular oil passage in communication with the keyway;

[0006] The eccentric shaft, main bearing seat and orbiting scroll form an oil storage cavity. Lubricating oil enters the oil storage cavity through the oil supply channel. When the eccentric shaft rotates, the lubricating oil in the oil storage cavity is splashed to the contact surface of the orbiting scroll to lubricate the thrust surface.

[0007] By adopting the above scheme, when the eccentric shaft rotates, the lubricating oil in the oil storage cavity is splashed onto the contact surface of the moving scroll, lubricating the thrust surface. In addition, an annular oil passage and a lubricating oil passage are provided on the main bearing seat. When the height of the lubricating oil in the oil storage cavity is higher than the bottom surface of the annular oil passage, the oil passes through the lubricating oil passage to lubricate the keyway and the cross slip ring.

[0008] Further, the thrust surface is arranged on the upper surface of the main bearing seat and contacts the contact surface.

[0009] Further, the number of the annular oil passages matches the number of the keyways, and the annular oil passage has an oil inlet hole and an oil outlet hole.

[0010] Further, the oil inlet hole is communicated with the oil storage cavity through an oil inlet flow passage, and the oil inlet flow passage is arranged on the side wall of the main bearing seat.

[0011] By adopting the above scheme, the lubricating oil in the oil storage cavity enters the annular oil passage through the oil inlet flow passage and the oil inlet hole. When the height of the lubricating oil in the oil storage cavity is higher than the bottom surface of the annular oil passage, the lubricating oil continuously passes through the oil inlet hole and the oil outlet hole, forming a cycle in the annular oil passage to cool the thrust surface.

[0012] Further, the lubricating oil passage includes a horizontal oil outlet passage and a vertical oil outlet passage. The horizontal oil outlet passage is communicated with the vertical oil outlet passage, and the horizontal oil outlet passage is communicated with the keyway.

[0013] By adopting the above scheme, the lubricating oil passage is arranged on the bottom surface of the ring and is communicated with the annular oil passage. When the height of the lubricating oil in the oil storage cavity is higher than the bottom surface of the annular oil passage, the lubricating oil passes through the vertical oil outlet passage and the horizontal oil outlet passage and flows out in the keyway to lubricate the cross slip ring.

[0014] Further, the moving scroll disk is connected to the eccentric shaft through a release bushing and a bearing. The release bushing is connected to the eccentric shaft, and the bearing is arranged between the release bushing and the moving scroll disk.

[0015] Further, the oil supply passage includes a main passage, a first oil passing gap, and a second oil passing gap. The main passage is opened on the eccentric shaft. The first oil passing gap is arranged between the eccentric shaft and the release bushing, and the second oil passing gap is arranged between the release bushing and the bearing.

[0016] By adopting the above scheme, the lubricating oil is at the bottom of the compressor and enters the oil storage cavity through the main passage, the first oil passing gap, and the second oil passing gap, thereby providing lubricating oil for the thrust surface and the keyway.

[0017] On the other hand, the present invention also discloses a scroll compressor, including any one of the above-mentioned scroll compressor oil storage and lubrication mechanisms. Description of the Drawings

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required in the description of the embodiments or the prior art.

[0019] Figure 1 is an overall sectional view of a scroll compressor;

[0020] Figure 2 is an assembly drawing of the main bearing seat and the cross slide ring;

[0021] Figure 3 is a sectional view of the main bearing seat and the cross slide ring;

[0022] Figure 4 is a schematic diagram of the main bearing seat;

[0023] Figure 5 is a top view of the main bearing seat;

[0024] Figure 6 is a longitudinal sectional view of the oil inlet and outlet holes of the main bearing seat;

[0025] Figure 7 is a transverse sectional view of the main bearing seat;

[0026] Figure 8 is a schematic diagram of the oil supply channel.

[0027] The reference numerals involved in the drawings are as follows: eccentric shaft 1, cross slide ring 2, moving scroll disk 3, contact surface 31, main bearing seat 4, thrust surface 41, annular oil passage 42, oil inlet hole 421, oil outlet hole 422, oil inlet flow path 43, lubricating oil path 44, horizontal oil outlet passage 441, vertical oil outlet passage 442, keyway 45, oil storage cavity 5, unloading bushing 6, guide groove 61, guide surface 62, oil supply channel 7, main channel 71, first oil passing gap 72, second oil passing gap 73, bearing 8. Detailed implementation manners

[0028] The following further elaborates on the present invention with reference to the drawings.

[0029] As Figure 1-8 shown, the present invention provides an oil storage and lubrication mechanism for a scroll compressor, including an eccentric shaft 1, a cross slide ring 2, a moving scroll disk 3, and a main bearing seat 4. The main bearing seat 4 has a thrust surface 41 and a keyway 45 for the cross slide ring 2 to slide. The thrust surface 41 is provided with an annular oil passage 42, and the bottom surface of the annular oil passage 42 is provided with a lubricating oil path 44 communicating with the keyway 45;

[0030] The eccentric shaft 1, the main bearing seat 4, and the moving scroll disk 3 form an oil storage cavity 5. Lubricating oil enters the oil storage cavity 5 through the oil supply channel 7. The bottom surface of the moving scroll disk is the contact surface. When the eccentric shaft rotates, the lubricating oil in the oil storage cavity lubricates the contact surface and the thrust surface of the moving scroll disk.

[0031] When the scroll compressor operates at a relatively high speed, the oil pumping inlet volume of the eccentric shaft 1 is greater than the oil outlet volume of the oil outlet hole 422, and the oil storage cavity 5 is filled with lubricating oil. The lubricating oil lubricates the contact surface 31 and the thrust surface 41 of the moving scroll disk 3. When the scroll compressor operates at a relatively low speed, the liquid level height of the oil storage cavity 5 is flush with the bottom surface of the annular oil passage 42, and the eccentric shaft 1 splashes oil during operation to lubricate the contact surface 31 and the thrust surface 41 of the moving scroll disk 3. In addition, an annular oil passage 42 and a lubricating oil passage 44 are provided on the main bearing seat 4, and the oil fluid lubricates the keyway 45 and the cross slip ring 2 through the lubricating oil passage 44.

[0032] To further optimize the implementation effect of the present invention, the thrust surface 41 is the upper surface of the main bearing seat 4, which contacts the contact surface 31, and the number of the annular oil passages 42 matches the number of the keyways 45. The annular oil passage 42 has an oil inlet hole 421 and an oil outlet hole 422, and the oil inlet hole 421 and the oil outlet hole 422 are arranged at both ends of the annular oil passage 42. Among them, the oil inlet hole 421 is communicated with the oil storage cavity 5 through an oil inlet flow passage 43, and the oil inlet flow passage 43 is arranged on the side wall of the main bearing seat 4. Since the outer wall of the main bearing seat 4 is closely attached to the housing of the compressor, the lubricating oil fluid will not flow out at the end of the oil inlet flow passage 43.

[0033] The lubricating oil fluid in the oil storage cavity 5 enters the annular oil passage 42 through the oil inlet flow passage 43 and the oil inlet hole 421. When the height of the lubricating oil fluid in the oil storage cavity 5 is higher than the bottom surface of the annular oil passage 42, the lubricating oil fluid continuously passes through the oil inlet hole 421 and the oil outlet hole 422 to form a cycle in the annular oil passage 42 to cool the thrust surface 41.

[0034] To lubricate the keyway 45 with the lubricating oil fluid, the lubricating oil passage 44 is communicated with the annular oil passage 42. Among them, the lubricating oil passage 44 includes a horizontal oil outlet passage 441 and a vertical oil outlet passage 442. The horizontal oil outlet passage 441 is communicated with the vertical oil outlet passage 442, and the horizontal oil outlet passage 441 is communicated with the keyway 45. When the scroll compressor operates normally, the lubricating oil fluid is sent to the oil storage cavity 5 through an oil pump. The lubricating oil fluid in the oil storage cavity 5 enters the annular oil passage 42. A part of it passes through the vertical oil outlet passage 442 and the horizontal oil outlet passage 441 to lubricate the keyway 45 and the reciprocating cross slip ring 2, and the other part is discharged through the oil outlet hole 422.

[0035] When the scroll compressor operates at a relatively low speed, the oil pumping inlet volume of the eccentric shaft 1 is less than the oil outlet volume of the oil outlet hole 422, and the liquid level height of the oil storage cavity 5 is flush with the bottom surface of the annular oil passage 42. The lubricating oil in the oil storage cavity 5 intermittently enters the annular oil passage 42 through the oil inlet flow passage 43 and the oil inlet hole 421, and the oil fluid intermittently lubricates the keyway 45 and the cross slip ring 2 through the lubricating oil passage 44. The eccentric shaft 1 splashes oil during operation to lubricate the contact surface 31 and the thrust surface 41 of the moving scroll disk 3.

[0036] In some embodiments of the present invention, the moving scroll disk 3 is connected to the eccentric shaft 1 through a unloading bushing 6 and a bearing 8. The unloading bushing 6 is connected to the eccentric shaft 1, and the bearing 8 is arranged between the unloading bushing 6 and the moving scroll disk 3. Wherein, a flow guiding groove 61 and a flow guiding surface 62 for lubricating oil to pass through are formed on the unloading bushing 6, and the flow guiding groove 61 and the flow guiding surface 62 are in the same cross section.

[0037] In addition, the oil supply passage 7 includes a main passage, a first oil passing gap 72, and a second oil passing gap 73. The main passage is formed on the eccentric shaft 1, the first oil passing gap 72 is arranged between the eccentric shaft 1 and the unloading bushing 6, and the second oil passing gap 73 is arranged between the unloading bushing 6 and the bearing 8. The lubricating oil at the bottom of the compressor is pumped into the main passage by an oil pump, and gathers at the top of the unloading bushing 6. A part of the lubricating oil enters the first oil passing gap 72, and another part of the lubricating oil enters the second oil passing gap 73 through the flow guiding groove 61 and gathers in the oil storage cavity 5.

[0038] On the other hand, the present invention also discloses a scroll compressor, including a scroll compressor oil storage and lubrication mechanism disclosed in any of the above embodiments.

[0039] For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. An oil storage and lubrication mechanism for a scroll compressor, comprising an eccentric shaft (1), a cross slip ring (2), and a moving scroll disk (3), characterized in that Further included are: A main bearing seat (4), the main bearing seat (4) having a thrust surface (41) and a keyway (45) for the cross slip ring (2) to slide, an annular oil passage (42) being provided on the thrust surface (41), and a lubricating oil passage (44) communicating with the keyway (45) being provided on the bottom surface of the annular oil passage (42); An eccentric shaft (1), the main bearing seat (4) and the moving scroll disk (3) form an oil storage cavity (5), lubricating oil enters the oil storage cavity (5) through an oil supply passage (7), the eccentric shaft (1) rotates, splashing the lubricating oil in the oil storage cavity (5) onto the contact surface (31) of the moving scroll disk (3) to lubricate the thrust surface (41).

2. The oil storage and lubrication mechanism of the scroll compressor according to claim 1, wherein The thrust surface (41) is provided on the upper surface of the main bearing seat (4) and contacts the contact surface (31).

3. The oil storage lubrication mechanism of the scroll compressor according to claim 2, characterized in that, The number of the annular oil passages (42) matches the number of the keyways (45), and the annular oil passage (42) has an oil inlet hole (421) and an oil outlet hole (422).

4. The oil storage lubrication mechanism of the scroll compressor according to claim 3, characterized in that, The oil inlet hole (421) communicates with the oil storage cavity (5) through an oil inlet flow passage (43), and the oil inlet flow passage (43) is provided on the side wall of the main bearing seat (4).

5. The oil storage lubrication mechanism of the scroll compressor according to claim 4, characterized in that, The lubricating oil passage (44) includes a horizontal oil outlet passage (441) and a vertical oil outlet passage (442), the horizontal oil outlet passage (441) communicates with the vertical oil outlet passage (442), and the horizontal oil outlet passage (441) communicates with the keyway (45).

6. The oil storage lubrication mechanism of the scroll compressor according to claim 1, characterized in that The moving scroll disk (3) and the eccentric shaft (1) are connected through a unloading bushing (6) and a bearing (8), the unloading bushing (6) is connected to the eccentric shaft (1), and the bearing (8) is provided between the unloading bushing (6) and the moving scroll disk (3).

7. The oil storage and lubrication mechanism of the scroll compressor according to claim 6, characterized in that, The oil supply passage (7) includes a main passage (71), a first oil passing gap (72), and a second oil passing gap (73), the main passage (71) is provided on the eccentric shaft (1), the first oil passing gap (72) is provided between the eccentric shaft (1) and the unloading bushing (6), and the second oil passing gap (73) is provided between the unloading bushing (6) and the bearing (8).

8. A scroll compressor, characterized in that, It includes the scroll compressor oil storage and lubrication mechanism according to any one of claims 1 - 7.

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