Shaft end assembly of a compressor, compressor

Abstract

The application provides a shaft end assembly of a compressor and the compressor, wherein the shaft end assembly of the compressor comprises a support, a driving shaft, a thrust bearing and a thrust block, the driving shaft and the thrust block are connected to the support respectively, one end of the thrust bearing is clamped on the driving shaft, the other end of the thrust bearing is clamped on the thrust block, the thrust bearing is located between the thrust block and the driving shaft, a second channel is arranged on the driving shaft along the axial direction of the driving shaft, a first channel is further arranged on the driving shaft, one end of the first channel is communicated with the second channel, and the other end of the first channel is arranged on the outer wall of the driving shaft, so that the oil in the compressor can be transported to the space between the support and the driving shaft through the second channel and the first channel, then flows to the space between the outer surface of the thrust bearing and the thrust block, and forms an oil film, which can overcome the defect that the scroll compressor in the prior art cannot form an oil film between the thrust bearing and the thrust block, and causes the sliding surface of the thrust block and the thrust bearing to be abraded.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressor, in particular to a shaft end assembly 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 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 shaft end assembly 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 shaft end assembly of compressor, comprising: a bracket, a driving shaft, a thrust bearing and a thrust bearing, the driving shaft and the thrust bearing are connected to the bracket respectively, one end of the thrust bearing is clamped on the driving shaft, the other end is clamped on the thrust bearing, and the thrust bearing is located between the thrust bearing and the driving shaft along the axial direction of the driving shaft, the second channel is provided on the driving shaft, the first channel is also provided on the driving shaft, one end of the first channel is communicated with the second channel, and the other end is opened on the outer wall of the driving shaft, so that the oil in the compressor can be transported to the space between the bracket and the driving shaft through the second channel and the first channel, then flows to the space between the outer surface of the thrust bearing and the thrust bearing, and forms an oil film.

[0005] In some embodiments, the thrust bearing is provided with a through hole, the second channel is communicated with the through hole, so that the oil in the compressor can be transported to the second channel through the through hole.

[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 sequence, the second part is sleeved on the thrust bearing, and the second surface is in contact with the end surface of the thrust bearing.

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

[0008] In some embodiments, a protrusion is arranged on the second surface, a first groove is arranged on the end surface of the thrust bearing, the first groove is annular, the protrusion is located in the first groove, and the protrusion can move in the first groove.

[0009] In some embodiments, the protrusion is annular, the protrusion matches the first groove, and the height of the protrusion is greater than the depth of the first groove.

[0010] In some embodiments, a fifth channel is arranged on the thrust bearing, one end of the fifth channel is communicated with the first groove, and the other end of the fifth channel is communicated with the oil pool of the compressor, so that the oil in the first groove can flow back to the compressor through the fifth channel.

[0011] In some embodiments, a third channel is arranged on the support, a fourth channel is arranged on the thrust bearing, one end of the third channel is communicated with the first channel, and the other end of the third channel is communicated with the fourth channel, and the fourth channel is communicated with the first groove.

[0012] In some embodiments, the thrust bearing has an outer surface in contact with the end surface of the thrust bearing, a plurality of second grooves are arranged on the end surface of the thrust bearing in contact with the outer surface of the thrust bearing, and the second grooves are arranged along the radial direction of the thrust bearing.

[0013] In some embodiments, a fixed bearing is sleeved in the support, the fixed bearing is located between the driving shaft and the inner wall of the support, the other end of the first channel is opposite to the fixed bearing, a second gap is formed between the inner wall of the support and the thrust bearing, and the oil flowing out of the first channel passes through the fixed bearing and then flows to the space between the thrust bearing and the thrust bearing through the second gap.

[0014] The application also provides a compressor comprising the shaft end assembly of any one of the preceding.

[0015] The application provides a shaft end assembly of a compressor, oil in the compressor is first delivered to a second channel through a first channel and the second channel, and then delivered to a support and a driving shaft through the first channel, so that the support and the driving shaft are first lubricated, and then oil between the support and the driving shaft flows to an outer surface of a thrust bearing and a thrust bearing through an inner wall of the support and / or an outer peripheral wall of the driving shaft, so that an oil film is formed between the outer surface of the thrust bearing and the thrust bearing, when the compressor operates, the oil film is effectively and fully formed between the outer surface of the thrust bearing and the thrust bearing, friction between the thrust bearing and the thrust bearing is reduced, thrust noise is reduced, and the performance and reliability of the compressor are improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is an overall assembly structure diagram of the shaft end assembly of the compressor of the embodiment of the application.

[0017] Figure 2 It is a partial enlarged view of the shaft end assembly of the compressor of the embodiment of the application.

[0018] Figure 3 It is a structure schematic view of the thrust bearing of the shaft end assembly of the compressor of the embodiment of the application.

[0019] Figure 4 It is a sectional view of the thrust bearing of the shaft end assembly of the compressor of the embodiment of the application.

[0020] Figure 5 It is a top view of the thrust bearing of the shaft end assembly of the compressor of the embodiment of the application.

[0021] Figure 6 It is a partial enlarged view of the shaft end assembly of the compressor of another embodiment of the application.

[0022] Figure 7 It is a sectional view of the thrust bearing of the shaft end assembly of the compressor of another embodiment of the application.

[0023] The reference signs are as follows:

[0024] 1, thrust bearing; 2, thrust bearing; 3, oil pool; 4, support; 5, driving shaft; 6, fixed bearing; 7, protrusion; 8, first groove; 9, fifth channel; 10, main body; 11, first part; 12, second part; 13, second groove; 14, fourth channel; 15, third channel; 16, first channel; 17, second channel; 18, through hole. DETAILED DESCRIPTION

[0025] The scroll compressor mainly consists of a motor, an upper support, a lower support, a static scroll, a dynamic scroll, a cross slip ring, a driving shaft 5 and the like. The motor 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 5, 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 the lower support ring through a screw, and the lower support ring is fixed on the shell through spot welding.

[0026] When the compressor is running, the motor drives the driving shaft 5 to rotate, the crank of the driving shaft 5 drives the dynamic scroll to move, and the dynamic scroll moves around the center of the driving shaft 5 with a fixed radius under the anti-rotation restriction of the cross slip ring. The driving shaft 5 rotates to drive the scroll to move horizontally, the 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.

[0027] For reference Figures 1 to 7As shown, according to the embodiment of the present application, a shaft end assembly of a compressor is provided, comprising a bracket 4, a driving shaft 5 and a thrust bearing 2 connected to the bracket 4 respectively, a thrust bearing 1, one end of which is clamped on the driving shaft 5 and the other end of which is clamped on the thrust bearing 2, and the thrust bearing 1 is located between the thrust bearing 2 and the driving shaft 5, a second channel 17 is arranged on the driving shaft 5, and a first channel 16 is also arranged on the driving shaft 5, one end of the first channel 16 is communicated with the second channel 17, and the other end of the first channel 16 is opened on the outer peripheral wall of the driving shaft 5, so that the oil in the compressor can be transported to the space between the bracket 4 and the driving shaft 5 through the second channel 17 and the first channel 16, and then flow to the space between the outer surface of the thrust bearing 1 and the thrust bearing 2, and form an oil film. In this technical solution, the first channel 16 can be arranged radially, and the oil in the compressor is first transported to the second channel 17 through the first channel 16 and the second channel 17, and then transported to the space between the bracket 4 and the driving shaft 5 through the first channel 16, so as to lubricate the space between the bracket 4 and the driving shaft 5 first, and then the oil in the space between the bracket 4 and the driving shaft 5 flows along the inner wall of the bracket 4 and / or the outer peripheral wall of the driving shaft 5 to the space between the outer surface of the thrust bearing 1 and the thrust bearing 2, and forms an oil film between the outer surface of the thrust bearing 1 and the thrust bearing 2. When the compressor is running, it is ensured that an effective and comprehensive oil film can be formed between the outer surface of the thrust bearing 1 and the thrust bearing 2, the friction between the thrust bearing and the thrust bearing is reduced, the thrust noise is reduced, the performance and reliability of the compressor are improved, the driving shaft 5 and the thrust bearing 2 are sleeved on the bracket 4, the driving shaft 5 and the thrust bearing 2 are fixed by the bracket 4, so that the driving shaft 5 and the thrust bearing 2 can rotate in the bracket 4, one end of the thrust bearing 1 is sleeved on the driving shaft 5, the other end of the thrust bearing 1 is sleeved on the thrust bearing 2, the thrust bearing 1 is located between the thrust bearing 2 and the driving shaft 5, the thrust bearing 2 provides support force for the driving shaft 5 through the thrust bearing 1, so that the driving shaft 5 can drive the thrust bearing 1 to rotate synchronously.

[0028] In one specific embodiment, the thrust bearing 1 is provided with a through hole 18, and the second channel 17 is communicated with the through hole 18, so that the oil in the compressor can be transported to the second channel 17 through the through hole 18. In this technical solution, one end of the thrust bearing 1 is in contact with the compressor oil pool 3 during installation, and the oil in the compressor oil pool 3 is first transported to the second channel 17 through the through hole 18, and then transported to the space between the support 4 and the driving shaft 5 through the first channel 16, and then flows to the outer surface of the thrust bearing 1 and the thrust bearing 2, so as to form an oil film between the outer surface of the thrust bearing 1 and the thrust bearing 2, and provide an oil source for the outer surface of the thrust bearing 1 and the thrust bearing 2. The other end of the thrust bearing 1 penetrates the thrust bearing 2 and is in contact with the compressor oil pool 3, so as to ensure that the oil in the compressor oil pool 3 can be transported to the second channel 17.

[0029] In one specific embodiment, referring to Figure 3 the thrust bearing 1 comprises a main body 10, a first part 11 and a second part 12, the first part 11 has a first surface and a second surface, the main body 10 is located on the first surface, the second part 12 is located on the second surface, the through hole 18 penetrates the main body 10, the first part 11 and the second part 12 in sequence, the second part 12 is sleeved on the thrust bearing 2, and the second surface is in contact with the end surface of the thrust bearing 2.

[0030] Technical effects, the second surface is in contact with the end surface of the thrust bearing 2, and the oil between the support 4 and the driving shaft 5 can flow to the second surface and the thrust bearing 2, so that an oil film can be effectively and comprehensively formed between the thrust bearing 1 and the thrust bearing 2, the lubrication degree between the thrust bearing 1 and the thrust bearing 2 is ensured, and the wear is reduced. The main body 10, the first part 11 and the second part 12 are integrally formed, the outer diameter of the first part 11 is greater than the outer diameter of the main body 10, the outer diameter of the first part 11 is greater than the outer diameter of the second part 12, the outer diameter of the main body 10 is greater than the outer diameter of the second part 12, the outer diameter of the first part 11 is less than the outer diameter of the thrust bearing 2, and the main body 10 is connected with the driving shaft of the compressor.

[0031] In one specific embodiment, the outer peripheral wall of the second part 12 and the inner peripheral wall of the thrust bearing 2 have a first gap, and the oil in the compressor can flow back to the oil pool 3 of the compressor through the first gap after forming an oil film between the outer surface of the thrust bearing 1 and the thrust bearing 2. In this technical solution, the outer peripheral wall of the second part 12 and the inner peripheral wall of the thrust bearing 2 have a first gap, and the oil can flow back to the oil pool 3 of the compressor through the first gap after forming an oil film between the outer surface of the thrust bearing 1 and the thrust bearing 2, so as to effectively recover the lubricated oil and ensure the oil return rate of the compressor.

[0032] In one specific embodiment, the second surface is provided with a protrusion 7, the end surface of the thrust bearing 2 is provided with a first groove 8, the first groove 8 is annular, the protrusion 7 is located in the first groove 8, and the protrusion 7 can move in the first groove 8. In this technical solution, when the oil between the bracket 4 and the drive shaft 5 can flow between the second surface and the thrust bearing 2, the oil can flow into the first groove 8, so that the protrusion 7 rotates in the first groove 8, further reducing the friction loss between the thrust bearing 2 and the thrust bearing 1. During the operation of the compressor, the lubricating oil enters the first contact surface between the thrust bearing 2 and the thrust bearing 1 after being lubricated by the lower bracket 4 to form an oil film, and then enters the first groove 8 of the thrust bearing 2 to lubricate the protrusion 7 of the thrust bearing 1 and the second contact surface formed by the bottom surface of the first groove 8 of the thrust bearing 2. The lubricating oil enters the oil pump through the fifth channel 9 in the thrust bearing 2 for secondary pumping, forms an oil circulation, the second contact surface is the main thrust mechanism, the protrusion 7 of the thrust bearing 1 rotates in the first groove 8 of the thrust bearing 2, and can effectively reduce the friction loss between the second sliding surface of the thrust bearing 2 and the thrust bearing 1. The first groove 8 and the fifth channel 9 of the thrust bearing 2 can ensure that the friction loss between the thrust bearing 2 and the thrust bearing 1 is reduced and an internal oil circulation is formed, the thrust noise is reduced, and the performance and reliability of the compressor are improved.

[0033] In one specific embodiment, the protrusion 7 is annular, the protrusion 7 matches the first groove 8, and the height of the protrusion 7 is greater than the depth of the first groove 8. In this technical solution, the height of the protrusion 7 is greater than the depth of the first groove 8, so that the load of the thrust bearing 1 acts on the first groove 8 through the protrusion 7, the friction area between the thrust bearing 1 and the thrust bearing 2 is reduced, the first groove 8 can quickly flow into the thrust bearing 1 and the thrust bearing 2, the protrusion 7 rotates in the first groove 8, the friction loss between the thrust bearing 2 and the thrust bearing 1 is reduced, the thrust noise is reduced, and the performance and reliability of the compressor are improved.

[0034] In one specific embodiment, referring to FIG. 1, Figure 4 The thrust bearing 2 is provided with a fifth channel 9, one end of the fifth channel 9 communicates with the first groove 8, and the other end of the fifth channel 9 communicates with the oil pool 3 of the compressor, so that the oil in the first groove 8 can flow back to the compressor through the fifth channel 9. In this technical solution, one end of the fifth channel 9 communicates with the first groove 8, and the other end of the fifth channel 9 is provided on the outer wall of the thrust bearing 2 away from the second surface, so that the oil in the first groove 8 can flow back to the oil pool 3 of the compressor through the fifth channel 9, thereby being used for secondary pumping of the compressor, and ensuring the recycling of the oil.

[0035] In one specific embodiment, referring to Figure 6 and Figure 7 As shown, the bracket 4 is provided with a third channel 15, the thrust bearing 2 is provided with a fourth channel 14, one end of the third channel 15 is communicated with the first channel 16, the other end is communicated with the fourth channel 14, and the fourth channel 14 is communicated with the first groove 8. In this technical solution, during operation, the oil in the compressor oil pool 3 is first transported to the second channel 17, then to the third channel 15 through the first channel 16, and then flows into the first groove 8 through the fourth channel 14, so that the protrusion 7 rotates while being immersed in the first groove 8, reducing the friction loss between the thrust bearing 2 and the thrust bearing 1, reducing the thrust noise, and improving the performance and reliability of the compressor. During the operation of the compressor, the lubricating oil enters the first groove 8 of the thrust bearing 2 through the third channel 15 to lubricate the protrusion 7 of the thrust bearing 1, and the second contact surface formed by the bottom surface of the first groove 8 of the thrust bearing 2, and the lubricating oil enters the oil pump through the fifth channel 9 in the thrust bearing 2 for secondary pumping, forming an oil circulation, and the second contact surface is the main contact surface between the thrust bearing 2 and the protrusion 7 of the thrust bearing 1, which rotates while being immersed in the first groove 8 of the thrust bearing 2, effectively reducing the friction loss between the thrust bearing 2 and the thrust bearing 1.

[0036] In one specific embodiment, referring to Figure 5 As shown, the thrust bearing 1 has an outer surface in contact with the end surface of the thrust bearing 2, the end surface of the thrust bearing 2 in contact with the outer surface of the thrust bearing 1 is provided with a plurality of second grooves 13, and the second grooves 13 are arranged along the radial direction of the thrust bearing 2. In this technical solution, when the compressor is working, the oil between the thrust bearing 1 and the thrust bearing 2 forms an oil film through the second grooves 13, the oil tank plays a flow guiding role, and quickly enters the first groove 8, so as to improve the oil film formation speed.

[0037] In one specific embodiment, the bracket 4 is sleeved with a fixed bearing 6, the fixed bearing 6 is located between the driving shaft 5 and the inner wall of the bracket 4, the other end of the first channel 16 is opposite to the fixed bearing 6, the inner wall of the bracket 4 and the thrust bearing 1 have a second gap, and the oil flowing out of the first channel 16 flows to the space between the thrust bearing 1 and the thrust bearing 2 through the second gap after passing through the fixed bearing 6. In this technical solution, preferably, the fixed bearing 6 is a bearing, and the oil flowing out of the first channel 16 flows into the space between the thrust bearing 1 and the thrust bearing 2 after passing through the fixed bearing 6, so that multiple lubrication can be performed, and the oil utilization rate is improved.

[0038] The application also provides a compressor comprising the shaft end assembly of the compressor.

[0039] The above description is merely the preferred embodiment of the present application, but not to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application. The above description is merely the preferred embodiment of the present application, but not to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A shaft end assembly for a compressor, characterized by: The utility model relates to a bearing (4), drive shaft (5), thrust bearing (1) and thrust bearing (2), drive shaft (5) and thrust bearing (2) are connected on bearing (4) respectively, one end of thrust bearing (1) is clamped on drive shaft (5), the other end is clamped on thrust bearing (2), along the axial direction of drive shaft (5), second passage (17) is set up on drive shaft (5), first passage (16) is also set up on drive shaft (5), one end of first passage (16) is communicated with second passage (17), the other end is set up on the outer wall of drive shaft (5), so that the oil in compressor can be transported to the between bearing (4) and drive shaft (5) through second passage (17) and first passage (16), then flows to the between outer surface of thrust bearing (1) and thrust bearing (2), and forms oil film, Second passage (17) is communicated with through hole (18) to make the oil in compressor can be transported to second passage (17) through through hole (18), Thrust bearing (1) includes main body (10), first part (11) and second part (12), first part (11) has first surface and second surface, main body (10) is located on first surface, second part (12) is located on second surface, through hole (18) passes through main body (10), first part (11) and second part (12) in turn, second part (12) is sleeved on thrust bearing (2), and second surface is in contact with the end face of thrust bearing (2). There is first gap between the outer wall of second part (12) and the inner wall of thrust bearing (2), after the oil in compressor forms oil film between the outer surface of thrust bearing (1) and thrust bearing (2), can flow back to the oil pool (3) of compressor through first gap.

2. The shaft end assembly of the compressor of claim 1, wherein: Second surface is provided with protrusion (7), the end face of thrust bearing (2) is provided with first recess (8), first recess (8) is annular, protrusion (7) is located in first recess (8), and protrusion (7) can move in first recess (8).

3. The shaft end assembly of the compressor of claim 1, wherein: Protrusion (7) is annular, protrusion (7) is matched with first recess (8), and the height of protrusion (7) is greater than the depth of first recess (8).

4. The shaft end assembly of claim 3, wherein: Thrust bearing (2) is provided with fifth passage (9), one end of fifth passage (9) is communicated with first recess (8), and the other end is communicated with the oil pool (3) of compressor, so that the oil in first recess (8) can flow back to compressor through fifth passage (9).

5. The shaft end assembly of the compressor of claim 3, wherein: ​ 6. The shaft end assembly of the compressor of claim 3, wherein: The bracket (4) is provided with a third channel (15), the thrust bearing (2) is provided with a fourth channel (14), one end of the third channel (15) is communicated with the first channel (16), the other end is communicated with the fourth channel (14), and the fourth channel (14) is communicated with the first recess (8).

7. The shaft end assembly of the compressor of claim 1, wherein: The thrust bearing (1) has an outer surface in contact with an end surface of the thrust bearing (2), a plurality of second recesses (13) are arranged on the end surface of the thrust bearing (2) in contact with the outer surface of the thrust bearing (1), and the second recesses (13) are arranged along the radial direction of the thrust bearing (2).

8. The shaft end assembly of the compressor of claim 1, wherein: The fixed bearing (6) is sleeved in the bracket (4), the fixed bearing (6) is located between the driving shaft (5) and the inner wall of the bracket (4), the other end of the first channel (16) is opposite to the fixed bearing (6), the inner wall of the bracket (4) and the thrust bearing (1) have a second gap, and the oil flowing out of the first channel (16) flows to the space between the thrust bearing (1) and the thrust bearing (2) through the fixed bearing (6) and the second gap.

9. A compressor characterized by, A shaft end assembly of a compressor comprising the compressor of any one of claims 1-8.

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