Bearing structure of a compressor, compressor

Abstract

The application provides a bearing structure of a compressor, a compressor and a bearing structure of a compressor, which comprises a thrust bearing and a thrust bearing, the thrust bearing is sleeved on the thrust bearing, the thrust bearing has an outer surface in contact with an end surface of the thrust bearing, a through hole is arranged on the thrust bearing, an outlet is arranged on the outer surface of the thrust bearing, the outlet is communicated with the through hole, so that the oil in the compressor can be transported to the outlet through the through hole and flow out from the outlet, and an oil film is formed between the outer surface of the thrust bearing and the thrust bearing. The defects that the scroll compressor in the prior art cannot form an oil film between the thrust bearing and the thrust bearing, causing the sliding surface of the thrust bearing and the thrust bearing part to be worn.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressor, in particular to a bearing structure of compressor and compressor. BACKGROUND

[0002] Vortex compression belongs to rotary motion, which has a driving shaft, a thrust bearing and a thrust bearing and other components, the driving shaft rotates in the compressor, the thrust bearing component cooperates with the driving shaft and rotates, the thrust bearing supports the driving shaft and the thrust bearing upward, due to the gravity of the driving shaft and the thrust bearing and the pressure difference between the upper space and the lower space of the driving shaft, the carrying capacity of the thrust bearing component is increased, since the existing vortex compressor cannot effectively and comprehensively form an oil film between the thrust bearing and the thrust bearing, the sliding surface of the thrust bearing and the thrust bearing component will be worn, and the thrust noise will be generated, which will affect the reliability of the compressor. SUMMARY

[0003] Therefore, the present application provides a bearing structure of compressor and compressor, which can overcome the defect that the existing vortex compressor cannot form an oil film between the thrust bearing and the thrust bearing, causing the sliding surface of the thrust bearing and the thrust bearing component to be worn.

[0004] In order to solve the above problems, the present application provides a bearing structure of compressor, which comprises:

[0005] The thrust bearing and the thrust bearing, the thrust bearing is sleeved on the thrust bearing, the thrust bearing has an outer surface in contact with the end surface of the thrust bearing, the thrust bearing is provided with a through hole, the outer surface of the thrust bearing is provided with an outlet, the outlet is communicated with the through hole, so that the oil in the compressor can be transported to the outlet through the through hole, and flows out from the outlet, and an oil film is formed between the outer surface of the thrust bearing and the thrust bearing.

[0006] In some embodiments, the thrust bearing comprises a main body, a first part and a second part, the first part has a first surface and a second surface, the main body is located on the first surface, the second part is located on the second surface, the through hole passes through the main body, the first part and the second part in turn, the second part is sleeved on the thrust bearing, and the second surface is in contact with the end surface of the thrust bearing, and the outlet is arranged on the second surface.

[0007] In some embodiments, the outer peripheral wall of the second part and the inner peripheral wall of the thrust bearing have a first gap, and after the oil in the compressor forms an oil film between the outer surface of the thrust bearing and the thrust bearing, the oil can flow back to the oil pool of the compressor through the first gap.

[0008] In some embodiments, a plurality of outlets are provided along the radial direction of the first portion, and / or a plurality of outlets are provided along the circumferential direction of the first portion.

[0009] In some embodiments, a first channel is provided on the first portion along the radial direction of the first portion, the first channel being in communication with the outlet, and the first channel being in communication with the through hole.

[0010] In some embodiments, the outer circumferential wall of the main body is sleeved in the drive shaft of the compressor, and a second gap is formed between the end of the main body facing away from the first portion and the drive shaft, a third channel is provided on the main body along the axial direction of the main body, one end of the third channel being in communication with the second gap, and the other end of the third channel being in communication with the first channel.

[0011] In some embodiments, the first channel penetrates through the inner circumferential wall of the first portion along the radial direction of the first portion, and is in communication with the through hole.

[0012] In some embodiments, a second channel is provided on the second portion along the axial direction of the second portion, one end of the second channel being in communication with the oil pool of the compressor, and the other end of the second channel being in communication with the first channel.

[0013] In some embodiments, a plurality of oil grooves are provided on the end face of the thrust bearing in contact with the outer surface of the thrust bearing, the oil grooves being arranged along the radial direction of the thrust bearing, or the oil grooves being arranged along the circumferential direction of the thrust bearing.

[0014] The present application also provides a compressor comprising the bearing structure of any one of the preceding compressor.

[0015] The present application provides a bearing structure of a compressor and a compressor, when installed, the through hole is arranged opposite to the oil passage of the drive shaft of the compressor, at this time, one end of the thrust bearing is in contact with the oil pool of the compressor, and the other end of the thrust bearing is connected to the drive shaft of the compressor, by using the suction force of the pump body of the compressor, the oil in the compressor can be transported to the outlet through the through hole, so that the oil flows out of the outlet, and an oil film is formed between the outer surface of the thrust bearing and the thrust bearing, because the thrust bearing is sleeved on the thrust bearing, the outer diameter of the thrust bearing is greater than the outer diameter of the thrust bearing, when the oil flows out of the outlet, on the end face of the thrust bearing, when the compressor is running, the flow direction of the oil is outward along the radial direction of the thrust bearing, which ensures that an effective and comprehensive oil film can be formed between the outer surface of the thrust bearing and the thrust bearing, reduces the friction between the thrust bearing part and the sliding surface of the drive shaft, reduces the thrust noise, and improves the performance and reliability of the compressor. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 FIG. 1 is a structural schematic diagram of a bearing structure of a compressor according to an embodiment of the present application;

[0017] Figure 2 Fig. 4 is a partial enlarged view of the bearing structure of the compressor according to an embodiment of the present application;

[0018] Figure 3 Fig. 5 is a schematic view of the structure of the thrust bearing in the bearing structure of the compressor according to an embodiment of the present application;

[0019] Figure 4 Fig. 6 is a bottom view of the thrust bearing in the bearing structure of the compressor according to an embodiment of the present application;

[0020] Figure 5 Fig. 7 is a perspective view of the thrust bearing in the bearing structure of the compressor according to an embodiment of the present application;

[0021] Figure 6 Fig. 8 is a sectional view of the thrust bearing in the bearing structure of the compressor according to a second embodiment of the present application;

[0022] Figure 7 Fig. 9 is a sectional view of the thrust bearing in the bearing structure of the compressor according to a third embodiment of the present application.

[0023] Reference signs are as follows:

[0024] 1. motor; 2. thrust bearing; 3. thrust bearing; 4. first passage; 5. outlet; 6. oil pool; 7. second passage; 8. through hole; 9. drive shaft; 10. first part; 11. second part; 12. main body; 13. third passage. DETAILED DESCRIPTION

[0025] The scroll compressor belongs to rotary motion, and has components such as a drive shaft, a thrust bearing and a thrust bearing. The drive shaft rotates in the compressor, the thrust bearing component cooperates with and rotates with the drive shaft, and the thrust bearing supports the drive shaft and the thrust bearing upward. Due to the gravity of the drive shaft and the thrust bearing and the pressure difference between the upper space and the lower space of the drive shaft, the load bearing capacity of the thrust bearing component is increased. In the related art, an oil groove is arranged on the thrust bearing, and the oil groove supplies oil to lubricate the rotating thrust surface of the thrust bearing and the drive shaft, thereby reducing the friction loss. However, since the oil groove is arranged on the thrust bearing, the lubricating oil flows from the outside to the thrust bearing after lubricating the shaft neck and the shaft, and the lubricating oil cannot effectively and comprehensively form an oil film between the thrust bearing component and the thrust bearing, which still causes wear of the sliding surface of the thrust bearing and the thrust bearing component, generates thrust noise, and affects the reliability of the compressor.

[0026] The scroll compressor mainly comprises a motor 1, an upper support, a lower support, a static scroll, a dynamic scroll, a cross slip ring, a driving shaft 9 and the like. The motor 1 is fixed on the shell through a hot sleeve, and the upper support is fixed on the shell through eight-point welding. The dynamic scroll and the static scroll are oppositely installed on the upper support with a phase angle difference of 180 degrees, the dynamic scroll is driven to move by the driving shaft 9, and the dynamic scroll is engaged with the static scroll to form a series of crescent-shaped closed cavities which are isolated from each other and have continuous volume changes. The static scroll is fixed on the upper support through a screw fastener. The lower support is fixed on a lower supporting ring through a screw, and the lower supporting ring is fixed on the shell through spot welding.

[0027] When the compressor is running, the motor 1 drives the driving shaft 9 to rotate, the crank of the driving shaft 9 drives the dynamic scroll to move, and the dynamic scroll moves around the center of the driving shaft 9 with a fixed radius under the anti-rotation restriction of the cross slip ring. The driving shaft 9 drives the scroll to move, gas enters the compression cavity composed of the dynamic scroll and the static scroll from the suction pipe assembly, the gas is compressed and discharged to the upper cover cavity through the static scroll exhaust port, then enters the intermediate cavity of the compressor complete machine composed of the upper support, the stator, the rotor, the balance block, the balance block cover and the driving shaft 9 through the flow guide channel of the upper support, and is discharged out of the compressor through the exhaust pipe.

[0028] Referring to Figures 1 to 7 According to the embodiment of the present application, a bearing structure of a compressor is provided, which comprises a thrust bearing 3 and a thrust bearing 2, the thrust bearing 3 is sleeved on the thrust bearing 2, the thrust bearing 3 has an outer surface in contact with an end surface of the thrust bearing 2, a through hole 8 is arranged on the thrust bearing 3, an outlet 5 is arranged on the outer surface of the thrust bearing 3, the outlet 5 is communicated with the through hole 8, so that the oil in the compressor can be transported to the outlet 5 through the through hole 8 and flow out of the outlet 5, and an oil film is formed between the outer surface of the thrust bearing 3 and the thrust bearing 2. In the technical solution, referring to Figure 1 When installed, the through hole 8 is installed opposite to the oil channel of the compressor driving shaft 9, at this time, one end of the thrust bearing 3 is in contact with the compressor oil pool 6, and the other end is connected with the compressor driving shaft 9. By using the suction force of the compressor pump body, the oil in the compressor can be transported to the outlet 5 through the through hole 8, so that the oil flows out of the outlet 5, and an oil film is formed between the outer surface of the thrust bearing 3 and the thrust bearing 2. Because the thrust bearing 3 is sleeved on the thrust bearing 2, the outer diameter of the thrust bearing 2 is greater than the outer diameter of the thrust bearing 2. When the oil flows out of the outlet 5, the flow direction of the oil is along the radial direction of the thrust bearing 2 outward when the compressor is running. It is ensured that the oil film can be effectively and comprehensively formed between the outer surface of the thrust bearing 3 and the thrust bearing 2, the friction between the thrust bearing part and the sliding surface of the driving shaft is reduced, the thrust noise is reduced, and the performance and reliability of the compressor are improved.

[0029] In one specific embodiment, referring to Figure 4 and Figure 5 illustrated, the thrust bearing 3 comprises a main body 12, a first part 10 having a first surface and a second surface, the main body 12 being located on the first surface, and a second part 11 being located on the second surface, the through hole 8 sequentially passing through the main body 12, the first part 10 and the second part 11, the second part 11 being sleeved on the thrust bearing 2, and the second surface being in contact with the end surface of the thrust bearing 2, and the outlet 5 being arranged on the second surface. In this technical solution, the second surface is in contact with the end surface of the thrust bearing 2, and the outlet 5 is arranged on the second surface, so that the oil film can be effectively and comprehensively formed between the thrust bearing 3 and the thrust bearing 2, the lubrication degree between the thrust bearing 3 and the thrust bearing 2 is ensured, and the wear is reduced. The main body 12, the first part 10 and the second part 11 are integrally formed, the outer diameter of the first part 10 is greater than the outer diameter of the main body 12, the outer diameter of the first part 10 is greater than the outer diameter of the second part 11, the outer diameter of the main body 12 is greater than the outer diameter of the second part 11, the outer diameter of the first part 10 is less than the outer diameter of the thrust bearing 2, and the main body 12 is connected with the driving shaft of the compressor.

[0030] In one specific embodiment, referring to Figure 2 illustrated, the outer peripheral wall of the second part 11 and the inner peripheral wall of the thrust bearing 2 have a first gap therebetween, and after the oil in the compressor forms an oil film between the outer surface of the thrust bearing 3 and the thrust bearing 2, the oil can flow back to the oil pool 6 of the compressor through the first gap. In this technical solution, the outer peripheral wall of the second part 11 and the inner peripheral wall of the thrust bearing 2 have a first gap therebetween, and after the oil flowing out of the outlet 5 forms an oil film between the outer surface of the thrust bearing 3 and the thrust bearing 2, the oil flows back to the oil pool 6 of the compressor through the first gap, so that the lubricated oil is effectively recovered, and the oil return rate of the compressor is ensured.

[0031] In one specific embodiment, a plurality of outlets 5 are arranged along the radial direction of the first part 10, and / or a plurality of outlets 5 are arranged along the circumferential direction of the first part 10. In this technical solution, a plurality of outlets 5 are arranged along the radial direction of the first part 10, and / or a plurality of outlets 5 are arranged along the circumferential direction of the first part 10, and when the compressor is running, the flow direction of the oil is outward along the radial direction of the thrust bearing 2, so that the oil film can be effectively and comprehensively formed between the outer surface of the thrust bearing 3 and the thrust bearing 2.

[0032] In one specific embodiment, along the radial direction of the first part 10, the first part 10 is provided with a first channel 4, the first channel 4 is communicated with the outlet 5, and the first channel 4 is communicated with the through hole 8. In this technical solution, the through hole 8 makes the oil flow out of the outlet 5 through the first channel 4, and the first channel 4 can be designed as a cavity structure in the first part 10, so that the first channel 4 can store lubricating oil, ensuring that the thrust bearing 3 and the thrust bearing 2 can be lubricated in any working state.

[0033] In one specific embodiment, referring to Figure 3 As shown, the outer peripheral wall of the main body 12 is sleeved in the drive shaft 9 of the compressor, and the end of the main body 12 away from the first part 10 has a second gap with the drive shaft 9. Along the axial direction of the main body 12, the main body 12 is provided with a third channel 13, one end of the third channel 13 is communicated with the second gap, and the other end is communicated with the first channel 4. In this technical solution, since the through hole 8 is installed opposite to the oil channel of the compressor drive shaft 9, by using the suction force of the compressor pump body, the through hole 8 can transport part of the oil in the compressor to the compression assembly of the compressor through the drive shaft 9, and the other part flows out of the outlet 5 through the second gap, the third channel 13 and the first channel 4, so as to lubricate between the thrust bearing 3 and the thrust bearing 2. The thrust bearing 2 is fixed on the lower support to form an assembly, the thrust bearing 3 and the drive shaft 9 are combined into a rotating scroll assembly, and the rotating scroll assembly is matched with the upper support, wherein the thrust bearing 3 is provided with the first channel 4 and the outlet 5. During the operation of the compressor, the lubricating oil enters the oil pool formed by the thrust bearing 3 and the drive shaft 9, most of the lubricating oil enters the pump body through the oil supply channel of the drive shaft 9 for lubrication, part of the lubricating oil enters the first channel 4 of the thrust bearing 3, flows out of the outlet 5 and forms an uniform oil film between the thrust bearing 2 and the thrust bearing 3, and then returns to the lower cover oil pool 6. This structure reduces the friction loss of the sliding surface of the thrust bearing 2 and the thrust bearing 3. The first channel 4 can ensure that an uniform oil film is formed between the thrust bearing 2 and the thrust bearing 3, reduce the thrust noise, and improve the performance and reliability of the compressor.

[0034] In one specific embodiment, referring to Figure 6As shown, along the radial direction of the first part 10, the first channel 4 penetrates the inner circumferential wall of the first part 10 and communicates with the through hole 8. In this technical solution, along the radial direction of the first part 10, the first channel 4 penetrates the inner circumferential wall of the first part 10 and communicates with the through hole 8. At this time, the first channel 4 corresponds to the shunt flow path of the through hole 8. In the process of conveying the oil in the compressor oil pool 6 through the through hole 8, part of the oil enters the driving shaft 9 and then enters the compressor pump body, and the other part flows out of the outlet 5 through the first channel 4, forming an oil film between the thrust bearing 3 and the thrust bearing 2. The through hole 8 provided on the thrust bearing 3 communicates with the first channel 4. In the process of rotating and supplying oil, the lubricating oil is divided into two paths. The main path is the lubricating oil supplied to the pump body through the through hole 8, and the sub-path is the first channel 4. Part of the lubricating oil is shunted into the first channel 4 through the through hole 8 and supplied to the sliding surface of the thrust bearing 3 and the thrust bearing 2. This structure can ensure that the lubricating oil is sufficient and uniform, and can also form a uniform oil film during the rotation of the driving shaft 9.

[0035] In one specific embodiment, referring to Figure 7 As shown, along the axial direction of the second part 11, the second part 11 is provided with a second channel 7, one end of the second channel 7 communicates with the oil pool 6 of the compressor, and the other end communicates with the first channel 4. In this technical solution, along the axial direction of the second part 11, the second part 11 is provided with a second channel 7, one end of the second channel 7 communicates with the oil pool 6 of the compressor, and the other end communicates with the first channel 4. At this time, the thrust bearing 3 communicates with the oil pool 6 through two flow paths. One flow path is the through hole 8, which conveys the oil in the oil pool to the compressor body. The other flow path is the second channel 7, which directly communicates with the oil pool 6, thereby ensuring that the lubricating oil at the outlet 5 is sufficient and uniform. Preferably, the center line of the second channel 7 is parallel to the center line of the through hole 8. In the process of rotating and supplying oil, the lubricating oil is divided into two paths. The main path is the lubricating oil supplied to the pump body through the through hole 8, and the sub-path is the second channel 7, which supplies the sliding surface of the thrust bearing 3 and the thrust bearing 2. This structure can ensure that the lubricating oil is sufficient and uniform, and can also form a uniform oil film during the rotation of the driving shaft 9.

[0036] In one specific embodiment, the end surface of the thrust bearing 2 in contact with the outer surface of the thrust bearing 3 is provided with a plurality of oil grooves arranged along the radial direction of the thrust bearing 2, or arranged along the circumferential direction of the thrust bearing 2. In this technical solution, when the oil flows out of the outlet 5 of the thrust bearing 3 during the operation of the compressor, the oil grooves can quickly form an oil film between the thrust bearing 3 and the thrust bearing 2, and the oil grooves can guide the flow of oil. Preferably, the width of the oil grooves matches the width of the outlet 5, so as to improve the speed of forming the oil film.

[0037] The application further provides a compressor comprising the bearing structure of the compressor.

[0038] The above merely describes the preferred embodiments of the present application, but should not be used to limit the present application. Any modification, equivalent replacement, and improvement within the spirit and principle of the present application should be included in the protection scope of the present application. The above merely describes the preferred embodiments of the present application, but should not be used to limit the present application. Any modification, equivalent replacement, and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A bearing structure of a compressor, characterized by: The application relates to a thrust bearing (3) and a thrust bearing (2), the thrust bearing (3) being sleeved on the thrust bearing (2), the thrust bearing (3) having an outer surface in contact with an end surface of the thrust bearing (2), a through hole (8) being arranged on the thrust bearing (3), an outlet (5) being arranged on the outer surface of the thrust bearing (3), the outlet (5) being communicated with the through hole (8) so that oil in a compressor can be transported to the outlet (5) through the through hole (8) and flow out of the outlet (5), and an oil film is formed between the outer surface of the thrust bearing (3) and the thrust bearing (2). The thrust bearing (3) comprises a main body (12), a first part (10) and a second part (11), the first part (10) having a first surface and a second surface, the main body (12) being arranged on the first surface, the second part (11) being arranged on the second surface, and the through hole (8) penetrating the main body (12), the first part (10) and the second part (11) in sequence. A first channel (4) is arranged on the first part (10) along the radial direction of the first part (10), the first channel (4) being communicated with the outlet (5) and the through hole (8). The second part (11) is sleeved on the thrust bearing (2), and the second surface is in contact with the end surface of the thrust bearing (2), and the outlet (5) is arranged on the second surface.

2. The bearing structure of a compressor according to claim 1, characterized by: A first gap is formed between the outer peripheral wall of the second part (11) and the inner peripheral wall of the thrust bearing (2), and after the oil film is formed between the outer surface of the thrust bearing (3) and the thrust bearing (2), the oil in the compressor can flow back to the oil pool (6) of the compressor through the first gap.

3. The bearing structure of a compressor according to claim 2, characterized by: A plurality of outlets (5) are arranged along the radial direction of the first part (10), and / or a plurality of outlets (5) are arranged along the circumferential direction of the first part (10).

4. The bearing structure of a compressor according to claim 2, characterized by: The outer peripheral wall of the main body (12) is sleeved in the driving shaft (9) of the compressor, a second gap is formed between the end of the main body (12) away from the first part (10) and the driving shaft (9), a third channel (13) is arranged on the main body (12) along the axial direction of the main body (12), one end of the third channel (13) is communicated with the second gap, and the other end of the third channel (13) is communicated with the first channel (4).

5. The bearing structure of a compressor according to claim 1, characterized by: The first channel (4) penetrates the inner peripheral wall of the first part (10) along the radial direction of the first part (10) and is communicated with the through hole (8).

6. The bearing structure of a compressor according to claim 1, characterized by: A second channel (7) is arranged on the second part (11) along the axial direction of the second part (11), one end of the second channel (7) is communicated with the oil pool (6) of the compressor, and the other end of the second channel (7) is communicated with the first channel (4).

7. The bearing structure of a compressor according to claim 1, characterized by: A plurality of oil grooves are arranged on the end surface of the thrust bearing (2) in contact with the outer surface of the thrust bearing (3), the oil grooves are arranged along the radial direction of the thrust bearing (2), or the oil grooves are arranged along the circumferential direction of the thrust bearing (2).

8. The bearing structure of a compressor according to claim 1, characterized by: ​ 9. A compressor characterized by, A bearing structure including the compressor of any one of claims 1-5.

Images