Bidirectional swash plate type electric compressor

Abstract

The invention relates to the technical field of two-way swash plate type electric compressors, in particular to a two-way swash plate type electric compressor which comprises a compressor body, a driving motor arranged outside the compressor body, a motor shaft arranged in the driving motor, a steel ball sliding shoe arranged in the compressor body in a sliding mode, and a rotating shaft fixedly connected to the end, located on the compressor body, of the motor shaft. A swash plate body is integrally formed on the rotating shaft, an oil storage chamber used for storing lubricating oil is installed in the machine body, a bearing arranged on the motor shaft in a sleeving mode is installed in the oil storage chamber, and a circulating mechanism used for driving the lubricating oil in the oil storage chamber to flow circularly is arranged in the machine body. The first piston reciprocates left and right, a low-temperature refrigerant is pumped into the first cylinder body to be compressed, the low-temperature refrigerant passes through a second connecting pipe and an annular pipe in the conveying process, and then in the process of compressing the low-temperature refrigerant, the low-temperature refrigerant is used for cooling a driving motor and lubricating oil, so that the compression efficiency of the low-temperature refrigerant is improved. The driving motor and lubricating oil are prevented from being in a high-temperature state to affect the service life, and the utilization rate of low-temperature refrigerants is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of bidirectional swash plate type electric compressors, and in particular to a bidirectional swash plate type electric compressor. Background Art

[0002] The compressor is a driven fluid machine that boosts low-pressure gas to high-pressure gas. It is the heart of the refrigeration system. It draws in low-temperature, low-pressure refrigerant gas from the suction pipe, compresses it, and then discharges high-temperature, high-pressure refrigerant gas to the exhaust pipe, providing power for the refrigeration cycle.

[0003] The bidirectional swash plate electric compressor of the present invention uses a motor to drive the shaft and the swash plate to rotate at high speed to compress the refrigerant and then discharge the compressed refrigerant. This causes a large amount of heat to be generated at the connection between the shaft and the bearing. At the same time, since the connection between the shaft and the bearing is lubricated by lubricating oil, the lubricating oil is in a high-temperature state. The lubricating oil in a high-temperature state is not only likely to cause damage to the bearing due to overheating, but is also easily oxidized and deteriorated due to the high temperature, affecting the lubrication effect. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem in the prior art that the lubricating oil at the bearings of the bidirectional swash plate compressor is in a high temperature state, which affects the lubrication effect, and to propose a bidirectional swash plate electric compressor.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A bidirectional swash plate electric compressor comprises a body, a drive motor is arranged outside the body, a motor shaft rotatably connected to the body is arranged in the drive motor, a steel ball shoe is slidably arranged in the body, the motor shaft is fixedly connected to a rotating shaft at one end of the body, a swash plate body is integrally formed on the rotating shaft and movably abuts against the steel ball shoe, an oil storage chamber for storing lubricating oil is installed in the body, a bearing sleeved on the motor shaft is installed in the oil storage chamber, a temporary retention chamber for temporarily retaining and settling the lubricating oil is arranged outside the oil storage chamber, an annular pipe is arranged in the body that is wound around the temporary retention chamber, a circulation mechanism for driving the circulation of the lubricating oil in the oil storage chamber is provided in the body, and a cooling component for cooling the lubricating oil in the temporary retention chamber is provided in the body.

[0007] Preferably, a plurality of first cylinders for compressing refrigerant are installed in the machine body, and a first piston connected to a steel ball shoe and a first connecting rod is provided in the first cylinder.

[0008] Preferably, the machine body is provided with a first discharge chamber and a second discharge chamber, the first cylinder body is provided with a first discharge port and a second discharge port respectively connected to the first discharge chamber and the second discharge chamber, and the first discharge chamber is fixedly provided with a first connecting pipe.

[0009] Preferably, the circulation mechanism includes a plurality of second cylinder bodies installed in the machine body, the second cylinder body is provided with a second piston connected to the steel ball sliding shoe and the second connecting rod, the temporary chamber and the second cylinder body are connected to the oil storage chamber, and a guide inclined plate is integrally formed in the temporary chamber.

[0010] Preferably, a first oil delivery pipe and a second oil delivery pipe respectively communicating with the oil storage chamber and the temporary retention chamber are fixedly connected to the second cylinder body, and a third oil delivery pipe communicating with the oil storage chamber is fixedly installed in the temporary retention chamber.

[0011] Preferably, the temporary chamber is equipped with a cleaning door, the left and right ends of the machine body are respectively equipped with a first cover and a second cover, and the guide inclined plate is composed of a plurality of inclined plates and a plurality of horizontal plates.

[0012] Preferably, the cooling component includes a placement chamber opened on the inner wall of the machine body, a delivery pipe connected to the second discharge chamber and the annular pipe is installed in the placement chamber, a second connecting pipe connected to the annular pipe is installed in the machine body, and the second connecting pipe is located at one end outside the machine body and is wrapped around the drive motor.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. The present invention drives the swash plate to rotate by a rotating shaft, so that the first piston performs left-right reciprocating motion in the first cylinder, and draws low-temperature refrigerant into the first cylinder for compression. During the transportation process, the low-temperature refrigerant passes through the second connecting pipe and the annular pipe. The low-temperature refrigerant cools the drive motor at the second connecting pipe, and the low-temperature refrigerant cools the lubricating oil in the temporary chamber at the annular pipe. Then, during the process of compressing the low-temperature refrigerant, the low-temperature refrigerant is used to cool the drive motor and the lubricating oil, thereby preventing the drive motor and the lubricating oil from being in a high-temperature state and affecting their service life, while also improving the utilization rate of the low-temperature refrigerant.

[0015] 2. In the present invention, when the first piston performs left-right reciprocating motion, the second piston performs left-right reciprocating motion in the second cylinder body through the steel ball sliding shoe, so as to draw the lubricating oil in the oil storage chamber into the second cylinder body, and then the lubricating oil is transported to the oil storage chamber from the third oil pipe, so that the lubricating oil is in a flowing state, thereby allowing the lubricating oil to take away the heat at the connection between the bearing and the motor shaft while allowing the lubricating oil to circulate and cover all surfaces requiring lubrication at the connection between the bearing and the motor shaft, so as to reduce local wear, and the first piston and the second piston are driven by the same driving device to reduce the driving equipment that needs to be installed and maintained, thereby improving the simultaneity between the movement of the compressed low-temperature refrigerant and the circulating lubricating oil, so that the circulating lubricating oil can take away the heat at the connection between the bearing and the motor shaft in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a bidirectional swash plate electric compressor proposed by the present invention;

[0017] Figure 2 A schematic diagram of a bidirectional swash plate electric compressor proposed by the present invention Figure 1 ;

[0018] Figure 3 A schematic diagram of a bidirectional swash plate electric compressor proposed by the present invention Figure 2 ;

[0019] Figure 4 This is a left-side cross-sectional view of a bidirectional swash plate electric compressor proposed by the present invention. Figure 1 ;

[0020] Figure 5 This is a left-side cross-sectional view of a bidirectional swash plate electric compressor proposed by the present invention. Figure 2 ;

[0021] Figure 6 This is a left-side cross-sectional view of a bidirectional swash plate electric compressor proposed by the present invention. Figure 3 ;

[0022] Figure 7 This is a left-side cross-sectional view of a bidirectional swash plate electric compressor proposed by the present invention. Figure 4 ;

[0023] Figure 8 A schematic front cross-sectional view of the temporary chamber of a bidirectional swash plate electric compressor proposed by the present invention Figure 1 .

[0024] In the figure: 1. body; 2. motor shaft; 3. steel ball shoe; 4. inclined plate; 5. first cylinder; 6. first piston; 7. bearing; 8. temporary chamber; 9. annular tube; 10. first discharge chamber; 11. second discharge chamber; 12. first discharge outlet; 13. second discharge outlet; 14. first connecting rod; 15. first connecting pipe; 16. placement chamber; 17. delivery pipe; 18. second connecting pipe; 19. second cylinder; 20. second piston; 21. oil storage chamber; 22. first oil pipeline; 23. second oil pipeline; 24. guide inclined plate; 25. cleaning door; 26. first cover; 27. second cover; 28. third oil pipeline; 29. ​​second connecting rod; 30. drive motor; 31. rotating shaft. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] Reference Figures 1-8, a bidirectional swash plate type electric compressor includes a body 1, a driving motor 30 is provided outside the body 1, and a motor shaft 2 is provided in the driving motor 30 for rotation with the body 1, a steel ball shoe 3 is slidably provided in the body 1, and a steel ball is provided in the steel ball shoe 3, the motor shaft 2 is located at one end of the body 1 and is fixedly connected to a rotating shaft 31, and a swash plate body 4 is integrally formed on the rotating shaft 31 with the steel ball movement. When the driving motor 30 drives the rotating shaft 31 and the swash plate body 4 to rotate through the motor shaft 2, the rotating swash plate body 4 pushes the steel ball shoe 3 to reciprocate left and right through the steel ball, and an oil storage chamber 21 for storing lubricating oil is installed in the body 1, and a bearing 7 is installed in the oil storage chamber 21 which is sleeved on the motor shaft 2, and the motor shaft 2 is rotatably connected to the oil storage chamber 21, and the lubricating oil is used to lubricate the connection between the bearing 7 and the motor shaft 2, and a temporary retention chamber 8 for temporarily retaining and precipitating the lubricating oil is provided outside the oil storage chamber 21 to remove impurities in the lubricating oil The waste materials (such as metal scraps generated by internal wear of the compressor) are deposited in the temporary retention chamber 8, and the lubricating oil is cooled in the temporary retention chamber 8. The body 1 is provided with an annular tube 9 wrapped around the outside of the temporary retention chamber 8, and the annular tube 9 is used to transport low-temperature refrigerant to cool the lubricating oil in the temporary retention chamber 8. The body 1 is provided with a circulation mechanism for driving the circulation of the lubricating oil in the oil storage chamber 21, so that the lubricating oil can take away the heat from the connection between the bearing 7 and the motor shaft 2, while allowing the lubricating oil to circulate and cover all the surfaces requiring lubrication at the connection between the bearing 7 and the motor shaft 2 to reduce local wear, and the circulating lubricating oil can carry impurities to the temporary retention chamber 8 to keep the lubrication system clean. The body 1 is provided with a cooling component for cooling the lubricating oil in the temporary retention chamber 8 to avoid overheating and damage to the bearing 7 due to the high temperature of the lubricating oil, and to avoid oxidation and deterioration of the lubricating oil due to high temperature, thereby affecting the lubrication effect.

[0027] Preferably, a plurality of first cylinders 5 for compressing refrigerant are installed in the machine body 1, and the first cylinder 5 is provided with a first piston 6 connected to the steel ball shoe 3 and the first connecting rod 14; a first discharge chamber 10 and a second discharge chamber 11 are provided in the machine body 1, and a first discharge port 12 and a second discharge port 13 are provided in the first cylinder 5, which are respectively connected to the first discharge chamber 10 and the second discharge chamber 11, and the first discharge port 12 and the second discharge port 13 are both provided with a one-way valve, so that the refrigerant only enters the second discharge port 13 and the first cylinder 5 in sequence from the second discharge chamber 11, and the refrigerant only enters the first discharge port 12 and the first discharge chamber 10 in sequence from the first cylinder 5, and the first discharge chamber 10 is fixedly installed with a first connecting pipe 15.

[0028] Preferably, the cooling component includes a placement chamber 16 opened on the inner wall of the body 1, and a delivery pipe 17 connected to the second discharge chamber 11 and the annular pipe 9 is installed in the placement chamber 16, and the delivery pipe 17 is provided with a one-way valve at the second discharge chamber 11, so that the refrigerant only enters the second discharge chamber 11 from the delivery pipe 17, and a second connecting pipe 18 connected to the annular pipe 9 is installed in the body 1, and a compressor controller is installed at the front end of the drive motor 30, and the second connecting pipe 18 is located at one end outside the body 1 and is wound around the drive motor 30 and the compressor controller, and the second connecting pipe 18 is used to transport low-temperature refrigerant to cool the drive motor 30 and the compressor controller, and reduce the operating temperature of the drive motor 30 and the compressor controller, thereby ensuring the working stability of the two components and improving their reliability.

[0029] When the steel ball shoe 3 performs a left-right reciprocating motion, the steel ball shoe 3 drives the first piston 6 to perform a left-right reciprocating motion in the first cylinder 5 through the first connecting rod 14. Figure 3 As shown, when the first piston 6 moves leftward in the first cylinder 5, the low-temperature refrigerant is delivered from the second connecting pipe 18, the annular pipe 9, the delivery pipe 17 and the second discharge chamber 11 to the first cylinder 5. When the first piston 6 moves rightward in the first cylinder 5, the low-temperature refrigerant is compressed, and the compressed high-temperature refrigerant is discharged from the body 1 through the first discharge port 12, the first discharge chamber 10 and the first connecting pipe 15. The above operation is then repeated to circulate and compress the refrigerant.

[0030] It is particularly noted that the first connecting pipe 15 and the second connecting pipe 18 can be connected to a device such as a condenser. The first connecting pipe 15 transports the high-temperature refrigerant to the device such as the condenser, and at the same time, the high-temperature refrigerant is restored to a low-temperature refrigerant through the device such as the condenser, and then the low-temperature refrigerant is transported to the second connecting pipe 18, so that the refrigerant is circulated.

[0031] Preferably, the circulation mechanism includes a plurality of second cylinder bodies 19 installed in the body 1, and the motor shaft 2 is located at the second cylinder body 19 and is fixedly connected to the rotating shaft 31 through a flange coupling. The second cylinder body 19 is provided with a second piston 20 connected to the steel ball sliding shoe 3 and the second connecting rod 29. The temporary chamber 8 and the second cylinder body 19 are connected to the oil storage chamber 21, and the temporary chamber 8 is integrally formed with a guide inclined plate 24; the second cylinder body 19 is fixedly connected to the oil storage chamber 21 and the temporary chamber 8. The first oil pipe 22 and the second oil pipe 23 are connected, and the temporary retention chamber 8 is fixedly installed with a third oil pipe 28 connected to the oil storage chamber 21. The first oil pipe 22, the second oil pipe 23 and the third oil pipe 28 are all provided with a one-way valve, so that the lubricating oil only flows from the oil storage chamber 21 and the first oil pipe 22 into the second cylinder 19, the lubricating oil only flows from the second cylinder 19 and the second oil pipe 23 into the temporary retention chamber 8, and the lubricating oil only flows from the temporary retention chamber 8 and the third oil pipe 28 to the oil storage chamber 21.

[0032] It is particularly noted that when the steel ball shoe 3 reciprocates left and right, the steel ball shoe 3 drives the second piston 20 to reciprocate left and right in the second cylinder 19 through the second connecting rod 29. When the second piston 20 moves rightward in the second cylinder 19, the lubricating oil in the oil storage chamber 21 flows from the first oil pipe 22 to the second cylinder 19. When the second piston 20 moves leftward in the second cylinder 19, the lubricating oil flows from the second oil pipe 23 to the temporary retention chamber 8. The lubricating oil is temporarily retained and precipitated in the temporary retention chamber 8. When the water level of the lubricating oil is higher than the outlet of the third oil pipe 28, the lubricating oil flows from the third oil pipe 28 to the oil storage chamber 21, thereby allowing the lubricating oil to circulate.

[0033] In the process of compressing the low-temperature refrigerant, the low-temperature refrigerant is used to cool the drive motor 30 and the lubricating oil in the temporary chamber 8, thereby preventing the drive motor 30 and the lubricating oil from being in a high-temperature state and affecting their service life, while improving the utilization rate of the low-temperature refrigerant.

[0034] At the same time, the first piston 6 and the second piston 20 are driven by the same driving device, thereby reducing the driving equipment that needs to be installed and maintained, thereby improving the simultaneity between the movement of the compressed low-temperature refrigerant and the circulating lubricating oil, so that the circulating lubricating oil can promptly remove the heat at the connection between the bearing 7 and the motor shaft 2;

[0035] Preferably, the temporary chamber 8 is equipped with a cleaning door 25, and the left and right ends of the body 1 are respectively equipped with a first cover 26 and a second cover 27 by bolts, and the guide inclined plate 24 is composed of multiple inclined plates and multiple horizontal plates, as shown in the attached figure. Figure 8As shown, when the lubricating oil flows from the second oil delivery pipe 23 to the temporary retention chamber 8, the lubricating oil falls to the lowest horizontal plate of the guide inclined plate 24, and then the lubricating oil flowing into the temporary retention chamber 8 gradually accumulates, causing the water level of the lubricating oil to gradually rise, and the impurities in the lubricating oil gradually settle to the lowest horizontal plate under the action of gravity, and the impurities are blocked by the adjacent inclined plates to prevent the impurities from moving to the third oil delivery pipe 28. When it is necessary to clean the impurities in the temporary retention chamber 8, the first cover 26 is removed and the cleaning door 25 is opened to clean the impurities in the temporary retention chamber 8.

[0036] The present invention can be explained through the following operation mode:

[0037] First, the drive motor 30 is started, and the drive motor 30 drives the motor shaft 2 and the rotating shaft 31 to rotate together. At the same time, low-temperature refrigerant is input from the second connecting pipe 18, and the low-temperature refrigerant is delivered to the first cylinder 5 through the annular pipe 9, the delivery pipe 17, and the second discharge chamber 11. The rotating shaft 31 drives the swash plate body 4 to rotate, and the rotating swash plate body 4 drives the steel ball shoe 3 to reciprocate left and right. The steel ball shoe 3 drives the first piston 6 to reciprocate left and right in the first cylinder 5 through the first connecting rod 14, thereby compressing the low-temperature refrigerant in the first cylinder 5 into high-temperature refrigerant. The high-temperature refrigerant is discharged from the body 1 through the first discharge chamber 10 and the first connecting pipe 15, and then the low-temperature refrigerant is pumped into the first cylinder 5 to be compressed.

[0038] At the same time, the steel ball shoe 3 drives the second piston 20 to reciprocate left and right in the second cylinder 19 through the second connecting rod 29, so as to draw the lubricating oil in the oil storage chamber 21 into the second cylinder 19, and then discharge the lubricating oil into the temporary chamber 8. The low-temperature refrigerant passes through the second connecting pipe 18 and the annular pipe 9 during the transportation process. The low-temperature refrigerant cools the drive motor 30 at the end of the second connecting pipe 18 outside the body 1, and the low-temperature refrigerant cools the lubricating oil in the temporary chamber 8 at the annular pipe 9. At the same time, the lubricating oil is temporarily retained and precipitated in the temporary chamber 8. After that, the lubricating oil is transported from the third oil pipe 28 to the oil storage chamber 21, so that the lubricating oil is in a flowing state, and then the lubricating oil takes away the heat at the connection between the bearing 7 and the motor shaft 2, while allowing the lubricating oil to circulate and cover all surfaces that need to be lubricated at the connection between the bearing 7 and the motor shaft 2 to reduce local wear.

[0039] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A bidirectional swash plate type electric compressor, comprising a body (1), characterized in that: A driving motor (30) is provided outside the machine body (1), a motor shaft (2) rotatably connected to the machine body (1) is provided in the driving motor (30), a steel ball shoe (3) is slidably provided in the machine body (1), the motor shaft (2) is located at one end of the machine body (1) and is fixedly connected to a rotating shaft (31), a swash plate (4) movably opposed to the steel ball shoe (3) is integrally formed on the rotating shaft (31), and an oil storage chamber (2) for storing lubricating oil is installed in the machine body (1). 1), a bearing (7) sleeved on a motor shaft (2) is installed in the oil storage chamber (21), a temporary retention chamber (8) for temporarily retaining and settling lubricating oil is provided outside the oil storage chamber (21), an annular tube (9) wound around the temporary retention chamber (8) is provided in the machine body (1), a circulation mechanism for driving the circulation of lubricating oil in the oil storage chamber (21) is provided in the machine body (1), and a cooling component for cooling the lubricating oil in the temporary retention chamber (8) is provided in the machine body (1).

2. A bidirectional swash plate type electric compressor according to claim 1, characterized in that: A plurality of first cylinders (5) for compressing refrigerant are installed in the machine body (1), and a first piston (6) connected to a steel ball sliding shoe (3) and a first connecting rod (14) is provided in the first cylinder (5).

3. A bidirectional swash plate type electric compressor according to claim 2, characterized in that: The machine body (1) is provided with a first discharge chamber (10) and a second discharge chamber (11); the first cylinder body (5) is provided with a first discharge port (12) and a second discharge port (13) respectively connected to the first discharge chamber (10) and the second discharge chamber (11); the first discharge chamber (10) is fixedly provided with a first connecting pipe (15).

4. The bidirectional swash plate type electric compressor according to claim 1, characterized in that: The circulation mechanism comprises a plurality of second cylinder bodies (19) installed in the machine body (1), wherein a second piston (20) connected to a steel ball sliding shoe (3) and a second connecting rod (29) is provided in the second cylinder body (19), the temporary chamber (8) and the second cylinder body (19) are connected to an oil storage chamber (21), and a guide inclined plate (24) is integrally formed in the temporary chamber (8).

5. The bidirectional swash plate type electric compressor according to claim 4, characterized in that: A first oil delivery pipe (22) and a second oil delivery pipe (23) are fixedly connected to the second cylinder body (19), and are respectively connected to the oil storage chamber (21) and the temporary retention chamber (8). A third oil delivery pipe (28) is fixedly installed in the temporary retention chamber (8) and is connected to the oil storage chamber (21).

6. The bidirectional swash plate type electric compressor according to claim 5, characterized in that: The temporary chamber (8) is equipped with a cleaning door (25), the left and right ends of the machine body (1) are respectively equipped with a first cover (26) and a second cover (27), and the guide inclined plate (24) is composed of a plurality of inclined plates and a plurality of horizontal plates.

7. The bidirectional swash plate type electric compressor according to claim 3, characterized in that: The cooling component comprises a placement chamber (16) opened on the inner wall of the body (1), a delivery pipe (17) connected to the second discharge chamber (11) and the annular pipe (9) is installed in the placement chamber (16), a second connecting pipe (18) connected to the annular pipe (9) is installed in the body (1), and the second connecting pipe (18) is located outside the body (1) and is wound around the drive motor (30) at one end.

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