Compressor oil supply structure, compressor

Abstract

The application provides a compressor oil supply structure and a compressor, wherein the compressor oil supply structure comprises a shell and a connecting pipe, the shell has a cavity structure inside, a compression unit is arranged in the cavity structure, the connecting pipe is located outside the shell, the cavity structure has an oil storage chamber, one end of the connecting pipe is communicated with the oil storage chamber, and the other end of the connecting pipe is connected with the compression unit; the connecting pipe is used for conveying lubricating oil in the oil storage chamber to the compression unit; according to the application, the defect that lubricating oil is deposited at the bottom of the lower cover of the compressor in the prior art, so that the lubricating oil participating in the internal circulation of the compressor becomes less and less can be overcome, and the reliability of the compressor is improved.

Description

TECHNICAL FIELD

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

[0002] Vortex compressors have the characteristics of simple structure, small volume, light weight, low noise, high mechanical efficiency and stable operation. With the progress of science and technology, vortex compressors are developing towards low cost, small size and high speed, which also brings severe challenges to the reliability of vortex compressors. The requirement of small size and low cost of compressors brings difficulties to the design space of the internal lubrication system of the compressor. In order to solve this problem, the related technology proposes a vortex compressor with an oil pool outside, but this structure brings another problem. Since the exhaust port of the compressor is in the middle of the shell, the gas discharged by the static disc passes through the exhaust groove on the static disc and the upper support, and finally is discharged through the exhaust port. Since the exhaust contains a certain amount of lubricating oil, over time, a certain amount of lubricating oil will be deposited at the bottom of the lower cover. If not handled in time, the lubricating oil participating in the internal circulation of the compressor will become less and less, thereby affecting the reliability of the compressor.

[0003] Therefore, the present application provides a compressor oil supply structure and a compressor to overcome the defects in the prior art that the lower cover of the compressor will deposit lubricating oil, resulting in less and less lubricating oil participating in the internal circulation of the compressor, thereby affecting the reliability of the compressor. SUMMARY

[0004] Therefore, the present application provides a compressor oil supply structure and a compressor to overcome the defects in the prior art that the lower cover of the compressor will deposit lubricating oil, resulting in less and less lubricating oil participating in the internal circulation of the compressor, thereby affecting the reliability of the compressor.

[0005] In order to solve the above problems, the present application provides a compressor oil supply structure, which comprises:

[0006] The shell has a cavity structure inside, the compression unit is arranged in the cavity structure, the connecting pipe is located outside the shell, the cavity structure has an oil storage chamber, one end of the connecting pipe communicates with the oil storage chamber, and the other end of the connecting pipe is connected to the compression unit. The connecting pipe is used to transport the lubricating oil in the oil storage chamber to the compression unit.

[0007] In some embodiments, the oil storage chamber is provided with a control valve connected to the connecting pipe. The control valve can be opened or closed according to the liquid level in the oil storage chamber, so that the connecting pipe is in communication or disconnected with the oil storage chamber.

[0008] In some embodiments, the control valve comprises a valve body and a valve core, the valve core is located in the valve body, lubricating oil in the oil storage chamber can flow into the valve body, the valve core has a first position to make the valve body communicate with the connecting pipe and a second position to make the valve body not communicate with the connecting pipe.

[0009] In some embodiments, a joint is sleeved on the valve body, the joint has a connecting port, one end of the connecting port communicates with the valve body and the other end communicates with the connecting pipe.

[0010] In some embodiments, a second groove is arranged on the valve core, lubricating oil in the oil storage chamber can be introduced into the second groove, a second oil outlet hole is arranged on the outer side wall of the valve core, the second oil outlet hole communicates with the second groove, a first oil outlet hole is arranged on the outer side wall of the valve core, the first oil outlet hole communicates with the connecting pipe, and the second oil outlet hole communicates with the first oil outlet hole when the valve core is in the first position.

[0011] In some embodiments, a first groove is arranged on the valve body, the valve core is located in the first groove, an opening of the first groove communicates with the oil storage chamber, the opening of the first groove and the opening of the second groove are in the same direction, and a communicating hole is arranged on the groove bottom of the first groove.

[0012] In some embodiments, the compression unit comprises a static scroll and a dynamic scroll, the static scroll and the dynamic scroll are engaged, an oil conveying channel is arranged on the static scroll, one end of the oil conveying channel communicates with the connecting pipe, and the other end is arranged on an end face of the static scroll facing the dynamic scroll.

[0013] In some embodiments, the other end of the connecting pipe penetrates through the shell and is connected to the static scroll, and a sealing element is arranged between the other end of the connecting pipe and the static scroll.

[0014] In some embodiments, a third groove is arranged on the end face of the static scroll facing the dynamic scroll, the third groove is arc-shaped, and the third groove communicates with the oil conveying channel.

[0015] The application further provides an electric machine comprising the compressor oil supply structure in any of the preceding embodiments.

[0016] The compressor oil supply structure provided by the application has the following beneficial effects: one end of the connecting pipe is communicated with the oil storage chamber, and the other end is connected with the compression unit; during installation, the other end of the connecting pipe is arranged close to the compression cavity of the compression unit; as the lubricating oil in the oil storage chamber is exhausted by the compressor, the exhaust gas contains a certain amount of lubricating oil; with the passage of time, a certain amount of lubricating oil is deposited in the oil storage chamber; therefore, the pressure of the oil storage chamber is greater than the pressure of the other end of the connecting pipe; the lubricating oil in the oil storage chamber is transported to the compression unit through the connecting pipe under the action of the pressure difference, so as to lubricate the compression unit; the accumulation of oil in the oil storage chamber when the oil pool is arranged in the compressor is avoided; the lubricating oil participating in the internal circulation of the compressor becomes less and less; and the reliability of the compressor is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a structural schematic diagram of the compressor oil supply structure of the embodiment of the application;

[0018] Figure 2 FIG. 4 is a schematic diagram of the closed state of the control valve in the compressor oil supply structure of the embodiment of the application;

[0019] Figure 3 FIG. 5 is a schematic diagram of the open state of the control valve in the compressor oil supply structure of the embodiment of the application;

[0020] Figure 4 FIG. 6 is a structural schematic diagram of the control valve in the compressor oil supply structure of the embodiment of the application;

[0021] Figure 5 FIG. 7 is an exploded view of the control valve in the compressor oil supply structure of the embodiment of the application;

[0022] Figure 6 FIG. 8 is a partial enlarged view of the compressor oil supply structure of the embodiment of the application;

[0023] Figure 7 FIG. 9 is a top view of the static scroll in the compressor oil supply structure of the embodiment of the application.

[0024] The reference signs are as follows:

[0025] 1, first cover; 2, static scroll; 3, first support; 4, steel pipe; 5, first oil return pipe; 6, rotor; 7, oil tank; 8, second oil return pipe; 9, second cover; 10, oil pump; 11, second support; 12, support ring; 13, second sealing assembly; 14, crankshaft; 15, motor; 16, shell; 17, first sealing assembly; 18, cross slip ring; 19, dynamic scroll; 20, control valve; 21, connecting pipe; 22, oil return hole; 23, fourth groove; 24, fifth groove; 25, joint; 26, first oil outlet hole; 27, second oil outlet hole; 28, second groove; 29, valve body; 30, valve core; 31, oil delivery channel; 32, third groove; 33, communication hole. DETAILED DESCRIPTION

[0026] The scroll compressor mainly consists of motor 15, first support 3, second support 11, static scroll 2, dynamic scroll 19, cross slip ring 18, crankshaft 14, etc. The motor 15 is fixed on the shell 16 by shrink fitting, and the first support 3 is fixed on the shell 16 by eight-point welding. The dynamic scroll 19 and the static scroll 2 are oppositely installed on the first support 3 with a phase angle difference of 180 degrees, and the dynamic scroll 19 moves under the drive of the crankshaft 14 to mesh with the static scroll 2 to form a series of crescent-shaped closed cavities that are isolated from each other and have continuous volume changes. The static scroll 2 is fixed on the first support 3 by screw fasteners. The second support 11 is fixed on the support ring 12 by screws, and the support ring 12 is fixed on the shell 16 by spot welding.

[0027] When the compressor is running, the motor 15 drives the crankshaft 14 to rotate, and the crank of the crankshaft 14 drives the dynamic scroll 19 to move. Under the anti-rotation restriction of the cross slip ring 18, the dynamic scroll 19 moves in a fixed radius around the center of the crankshaft 14. The refrigerant entering from the suction pipe is sucked into the crescent-shaped suction cavity formed by the dynamic scroll 19 and the static scroll 2, and is discharged from the exhaust hole of the static scroll 2 after compression, enters the cavity between the first cover 1 and the static scroll 2, and then enters the cavity between the upper support 3 and the motor 15 through the exhaust groove of the static scroll 2 and the first support 3. Part of it enters the lower end of the motor 15 through the through-flow groove between the motor 15 and the shell 16, and finally the high-pressure exhaust refrigerant is discharged through the exhaust pipe.

[0028] The oil tank 7 is fixed outside the shell 16, the upper oil return pipe 5 is inserted into the radial oil return hole 22 of the first support 3, the inlet end of the first oil return pipe 5 is welded with a steel pipe 4, a sealing ring is installed on the steel pipe 4, the lower end of the first support 3 is provided with a fourth groove 24, and a first sealing assembly 17 is installed in the fourth groove 24. The first sealing assembly 17 is sealed with the crankshaft 14, so that the dynamic and static scroll and the main bearing lubrication system of the first support 3 are in a sealed state.

[0029] The second oil return pipe 8 of the oil tank 7 is sealedly assembled with the oil pump 10, and the end of the oil return pipe 8 is welded with the steel pipe 4, and the steel pipe 4 is provided with a sealing ring. The upper end of the second support 11 is provided with a fifth groove 24, and the second sealing assembly 13 is interference-fitted in the fifth groove 24, so that the lubrication of the secondary bearing of the second support 11 is in a sealed state. The structure can effectively solve the design space problem of the internal lubrication system of the small-size and low-cost compressor, but the structure brings another problem, that is, because the exhaust gas contains a certain amount of lubricating oil, over time, a certain amount of lubricating oil will be deposited at the bottom of the lower cover, and if not handled in time, the lubricating oil participating in the internal circulation of the compressor will become less and less, thereby affecting the reliability of the compressor.

[0030] With reference to Figures 1 to 7 According to the embodiment of the present application, a compressor oil supply structure is provided, comprising: a shell and a connecting pipe 21, the shell has a cavity structure therein, the cavity structure is provided with a compression unit, the connecting pipe 21 is located outside the shell, the cavity structure has an oil storage chamber therein, one end of the connecting pipe 21 communicates with the oil storage chamber, and the other end of the connecting pipe 21 is connected with the compression unit, and the connecting pipe 21 is used for conveying lubricating oil in the oil storage chamber to the compression unit. The technical scheme, referring to Figure 1 As shown in the figure, one end of the connecting pipe 21 communicates with the oil storage chamber, and the other end of the connecting pipe 21 is connected with the compression unit, and during installation, the other end of the connecting pipe 21 is arranged close to the compression cavity of the compression unit. Because the lubricating oil in the oil storage chamber contains a certain amount of lubricating oil in the exhaust gas when the compressor exhausts, over time, a certain amount of lubricating oil is deposited in the oil storage chamber, therefore, the pressure of the oil storage chamber is greater than the pressure of the other end of the connecting pipe 21, and the lubricating oil in the oil storage chamber is conveyed to the compression unit through the connecting pipe 21 under the action of the pressure difference, so as to lubricate the compression unit, and the problem that the oil pool is arranged in the compressor, the oil storage chamber produces oil accumulation, and the lubricating oil participating in the internal circulation of the compressor becomes less and less is avoided, and the reliability of the compressor is improved.

[0031] In a specific embodiment, referring to Figure 2As shown, the oil storage chamber is provided with a control valve 20, the control valve 20 is connected with the connecting pipe 21, the control valve 20 can be opened or closed according to the liquid level in the oil storage chamber, so that the connecting pipe 21 is communicated or disconnected with the oil storage chamber. The technical scheme, the oil storage chamber is provided with a control valve 20, the connecting pipe 21 is communicated or closed with the oil storage chamber through the control valve 20, the control valve 20 can be opened or closed according to the liquid level in the oil storage chamber, so that the connecting pipe 21 is communicated or disconnected with the oil storage chamber, when the oil storage chamber deposits a certain capacity of lubricating oil, the control valve 20 controls the connecting pipe 21 to be communicated with the oil storage chamber, so that the lubricating oil in the oil storage chamber is transported to the compression unit, when the lubricating oil in the oil storage chamber is less, the connecting pipe 21 is disconnected with the oil storage chamber, the working efficiency of the compressor is improved, and useless energy consumption is avoided.

[0032] In a specific embodiment, referring to Figure 3 As shown, the control valve 20 comprises a valve body 29 and a valve core 30, the valve core 30 is located in the valve body 29, the lubricating oil in the oil storage chamber can flow into the valve body 29, the valve core 30 has a first position for connecting the valve body 29 with the connecting pipe 21, and a second position for not connecting the valve body 29 with the connecting pipe 21. The technical scheme, the valve core 30 is located in the valve body 29, the lubricating oil in the oil storage chamber can flow into the valve body 29, the valve body 29 has a first position for connecting the valve body 29 with the connecting pipe 21 under the action of the buoyancy of the lubricating oil in the oil storage chamber, and a second position for not connecting the valve body 29 with the connecting pipe 21, so as to ensure that the lubricating oil is transported to the compression unit when the oil in the oil storage chamber is too much, and the oil shortage phenomenon of the compressor is avoided.

[0033] In a specific embodiment, referring to Figure 4 and Figure 5 As shown, the valve body 29 is provided with a connector 25, the connector 25 has a connecting port, one end of the connecting port is communicated with the valve body 29, and the other end is communicated with the connecting pipe 21. The technical scheme, the valve body 29 is provided with a connector 25, which is convenient for dismounting and mounting the connector 25, and can also improve the stability of the valve body 29, the connector 25 has a connecting port, one end of the connecting port is communicated with the valve body 29, and the other end is communicated with the connecting pipe 21, so that the lubricating oil in the valve body 29 is guided to the connecting pipe 21 through the connector 25, and the maintenance between the connecting pipe 21 and the control valve 20 is facilitated when the control valve 20 fails.

[0034] In one specific embodiment, the valve core 30 is provided with a second groove 28, lubricating oil in the oil storage chamber can be introduced into the second groove 28, the outer side wall of the valve core 30 is provided with a second oil outlet hole 27, the second oil outlet hole 27 communicates with the second groove 28, the outer side wall of the valve core 30 is provided with a first oil outlet hole 26, the first oil outlet hole 26 communicates with the connecting pipe 21, when the valve core 30 is located at the first position, the second oil outlet hole 27 communicates with the first oil outlet hole 26. The technical scheme, the valve core 30 is provided with a second groove 28, lubricating oil in the oil storage chamber can be introduced into the second groove 28, so that the valve core 30 moves in the valve body 29 under the action of the lubricating oil buoyancy, when the valve core 30 is located at the first position, the second oil outlet hole 27 communicates with the first oil outlet hole 26, the lubricating oil in the oil storage chamber enters the connecting pipe 21 through the second groove 28, the second oil outlet hole 27 and the first oil outlet hole 26, thereby conveying the compression unit, and lubricating the compression unit.

[0035] In one specific embodiment, the valve body 29 is provided with a first groove, the valve core 30 is located in the first groove, and the opening of the first groove communicates with the oil storage chamber. The opening of the first groove and the opening of the second groove 28 are in the same direction, and the bottom of the first groove is provided with a communication hole 33. The technical scheme, the valve body 29 is provided with a first groove, the valve core 30 is located in the first groove, and the opening of the first groove and the opening of the second groove 28 are in the same direction, so that the lubricating oil in the oil storage chamber can enter the second groove 28, the bottom of the first groove is provided with a communication hole 33, which ensures that the valve core 30 can move in the valve body 29, the valve core 30 moves to the first position under the action of the lubricating oil buoyancy, and moves to the second position under the action of its own gravity.

[0036] In one specific embodiment, referring to Figure 6 The compression unit includes a static vortex disc 2 and a dynamic vortex disc 19, the static vortex disc 2 and the dynamic vortex disc 19 are engaged, the static vortex disc 2 is provided with an oil conveying channel 31, one end of the oil conveying channel 31 communicates with the connecting pipe 21, and the other end is opened on the end face of the static vortex disc 2 facing the dynamic vortex disc 19. The technical scheme, the static vortex disc 2 is provided with an oil conveying channel 31, one end of the oil conveying channel 31 communicates with the connecting pipe 21, and the other end is opened on the end face of the static vortex disc 2 facing the dynamic vortex disc 19, so that the lubricating oil in the oil storage chamber is conveyed to the end face of the static vortex disc 2 through the connecting pipe 21, to lubricate between the static vortex disc 2 and the dynamic vortex disc 19.

[0037] In one specific embodiment, the other end of the connecting pipe 21 penetrates through the shell and is connected to the static vortex disc 2, and a sealing element is arranged between the other end of the connecting pipe 21 and the static vortex disc 2. According to the technical scheme, the other end of the connecting pipe 21 penetrates through the shell and is connected to the static vortex disc 2, and a sealing element is arranged between the other end of the connecting pipe 21 and the static vortex disc 2, so that the connection between the connecting pipe 21 and the static vortex disc 2 is stable, the overflow of lubricating oil in the static vortex disc 2 is prevented, and the utilization rate of lubricating oil is improved.

[0038] In one specific embodiment, referring to Figure 7 As shown in the figure, the end face of the static vortex disc 2 facing the dynamic vortex disc 19 is provided with a third groove 32, the third groove 32 is arc-shaped, and the third groove is in communication with the oil conveying channel 31. According to the technical scheme, the third groove 32 is arc-shaped, and the third groove is in communication with the oil conveying channel 31, so that the contact area of the lubricating oil with the dynamic vortex disc 19 is increased after the lubricating oil is output through the oil conveying channel 31, the lubricating efficiency between the static vortex disc 2 and the dynamic vortex disc 19 is improved, and the lubricating effect is ensured.

[0039] The control valve 20 is arranged at the bottom of the oil pool of the second cover 9, and the control valve 20 is fixed at the bottom of the second cover 9. The control valve 20 is composed of a valve core 30, a valve body 29 and a joint 25. The control valve 20 is connected to the connecting pipe 21, the connecting pipe 21 is in communication with the oil conveying channel 31 of the static vortex disc 2, and the oil conveying channel is connected to the third groove 32 of the end face of the static vortex disc 2.

[0040] The valve core 30 of the control valve 20, the second groove 28, the radial second oil outlet hole 27, the valve core 30 can be moved up and down in the valve body 29 under the action of the buoyancy, the valve body 29 is provided with the first oil outlet hole 26, and the joint 25 is arranged outside the first oil outlet hole 26. When the oil exists at the bottom of the second cover body 9, the valve core 30 moves up under the action of the buoyancy, the second groove 28 and the radial second oil outlet hole 27 of the valve core 30 are communicated with the first oil outlet hole 26 of the valve body 29, and then the high-pressure lubricating oil at the bottom of the second cover body 9 enters the end face third groove 32 of the static scroll 2 through the control valve 20, the connecting pipe 21 and the oil conveying passage 31, so that the sliding surface of the dynamic and static disc is lubricated. It should be noted that the end face third groove 32 of the static scroll 2 is close to the compression chamber, so the pressure is lower than the exhaust pressure at the bottom of the lower cover, that is, the lubricating oil at the bottom of the second cover body 9 is supplied to the end face of the static scroll 2 under the action of the pressure difference. When the oil level at the bottom of the second cover body 9 drops to the lowest, that is, the valve core 30 moves under the action of its own gravity, the radial second oil outlet hole 27 of the valve core 30 is out of position with the oil outlet of the valve body 29 and is closed. In order to solve the problem of oil accumulation at the bottom of the oil pool outside the scroll compressor, the control valve and the oil conveying system are designed at the bottom of the lower cover oil pool, the oil at the bottom of the lower cover is conveyed to the sliding surface of the dynamic and static disc through the control valve to participate in the lubrication cycle, so as to avoid the reliability problem caused by the lack of oil in the compressor. The present application effectively participates in the lubrication cycle of the lubricating oil at the bottom of the lower cover, improves the reliability of the compressor. The problem of oil accumulation at the bottom of the lower cover caused by the setting of the oil pool outside the compressor is solved, the problem of lack of oil is solved, and the reliability of the compressor is improved. The lubricating oil at the bottom of the lower cover is conveyed to the sliding surface of the dynamic and static disc, and the friction power consumption is reduced. The present application provides an external oil storage scroll compressor with a lubricating oil recycling control utilization, which sets a lubricating oil control valve at the bottom of the lower cover, can effectively convey the lubricating oil deposited at the bottom of the lower cover to the sliding surface of the dynamic and static disc, increase the recycling rate of the lubricating oil, avoid the problem of lack of oil, and improve the reliability of the compressor.

[0041] The application further provides a compressor comprising the above-mentioned compressor oil supply structure.

[0042] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above description is only the preferred embodiment of the present application, and it should be pointed out that, for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, and these improvements and modifications shall be regarded as the protection scope of the present application.

Claims

1. A compressor oil supply structure characterized by comprising: The utility model provides a compressor oil supply structure, comprising: a housing and a connecting pipe (21), the housing has a cavity structure in it, a compression unit is arranged in the cavity structure, the connecting pipe (21) is located outside the housing, the cavity structure has an oil storage chamber in it, one end of the connecting pipe (21) communicates with the oil storage chamber, and the other end of the connecting pipe (21) is connected with the compression unit, and the connecting pipe (21) is used for conveying lubricating oil in the oil storage chamber into the compression unit; a control valve (20) is arranged in the oil storage chamber, the control valve (20) is connected with the connecting pipe (21), the control valve (20) can be opened or closed according to the liquid level in the oil storage chamber, so that the connecting pipe (21) is communicated or disconnected with the oil storage chamber; the control valve (20) comprises a valve body (29) and a valve core (30), the valve core (30) is located in the valve body (29), lubricating oil in the oil storage chamber can flow into the valve body (29), the valve core (30) has a first position for making the valve body (29) communicate with the connecting pipe (21) and a second position for making the valve body (29) not communicate with the connecting pipe (21); a second groove (28) is arranged on the valve core (30), lubricating oil in the oil storage chamber can be introduced into the second groove (28), a second oil outlet hole (27) is arranged on the outer side wall of the valve core (30), the second oil outlet hole (27) communicates with the second groove (28), a first oil outlet hole (26) is arranged on the outer side wall of the valve body (29), the first oil outlet hole (26) communicates with the connecting pipe (21), and when the valve core (30) is located at the first position, the second oil outlet hole (27) communicates with the first oil outlet hole (26); a first groove is arranged on the valve body (29), the valve core (30) is located in the first groove, the opening of the first groove communicates with the oil storage chamber, the opening of the first groove and the opening of the second groove (28) are in the same direction, and a communication hole (33) is arranged on the groove bottom of the first groove.

2. The oil supply structure of the compressor according to claim 1, characterized by: a connector (25) is sleeved on the valve body (29), the connector (25) has a connecting port, one end of the connecting port communicates with the valve body (29), and the other end of the connecting port communicates with the connecting pipe (21).

3. The oil supply structure for a compressor according to claim 1, characterized by: the compression unit comprises a static scroll (2) and a dynamic scroll (19), the static scroll (2) is engaged with the dynamic scroll (19), an oil conveying channel (31) is arranged on the static scroll (2), one end of the oil conveying channel (31) communicates with the connecting pipe (21), and the other end of the oil conveying channel (31) is arranged on the end face of the static scroll (2) facing the dynamic scroll (19).

4. The oil supply structure of the compressor according to claim 3, characterized by: the other end of the connecting pipe (21) penetrates through the housing and is connected on the static scroll (2), and a sealing element is arranged between the other end of the connecting pipe (21) and the static scroll (2).

5. The oil supply structure for a compressor according to claim 3, characterized by: a third groove (32) is arranged on the end face of the static scroll (2) facing the dynamic scroll (19), the third groove (32) is in an arc shape, and the third groove communicates with the oil conveying channel (31).

6. A compressor characterized by: the utility model provides a compressor oil supply structure.

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