Electric compressor disc chuck with high oil return

Abstract

The utility model discloses an electric compressor faceplate with high oil return, and belongs to the technical field of scroll compressors. An electric compressor faceplate with high oil return comprises a faceplate body, a faceplate surface, an eccentric sleeve shaft hole and a bearing hole, the faceplate surface, the eccentric sleeve shaft hole and the bearing hole are sequentially and fixedly arranged on the inner side of the faceplate body from top to bottom, and the faceplate surface makes contact with a movable scroll plate of a compressor; a plurality of air suction channels are formed in the joint of the faceplate surface and the inner side of the faceplate main body and are used for sucking air in a compression cavity formed by a movable scroll plate and a static scroll plate of the compressor; and a plurality of grooves are formed in the disc surface of the disc chuck, are connected with an air suction channel and are used for supplementing oil centrifugally thrown out by the eccentric bushing counterweight to a vortex air suction port in the periphery of the compression cavity along the grooves, so that more oil can flow back to a compressor system.

Description

Technical Field

[0001] The utility model belongs to the technical field of scroll compressors, and more specifically relates to a high-oil-return electric compressor faceplate. Background Art

[0002] As a crucial component of new energy vehicles, electric compressors play a crucial role. As the core component of new energy vehicle air conditioning systems, electric compressors play an irreplaceable role. Factors such as performance, vibration and noise, reliability, and sealing all significantly impact their operation.

[0003] The faceplate of an electric compressor in the prior art has a flat surface with no grooves in contact with the orbiting scroll gasket. During compressor operation, the oil return rate is low, resulting in insufficient lubrication of the faceplate bearing, orbiting scroll bearing, and counterweight, leading to wear. For example, a compressor oil return structure disclosed in a Chinese invention patent document (CN202320153936.2) employs an oil return device to allow oil to return to the oil return chamber of the device and flow through the oil return hole into the oil return line, thus preventing the oil from being directly exposed to the entire rear cover cavity and reducing the loss of return oil to the outside of the machine. However, this solution requires the faceplate, stator, and rear cover to be equipped with channels to match the oil return device, and a valve to control the return of oil to the faceplate. This makes installation more complicated, and the oil does not diffuse evenly after return, resulting in insufficient local lubrication and affecting the stability of the compressor operation.

[0004] Therefore, we need a disc with a simple structure that can increase the oil return channel and oil return volume, evenly spread the oil return, and improve the performance and stability of the compressor. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an electric compressor faceplate with high oil return, which has a simple structure and can increase the oil return channel and the oil return amount, so as to achieve the purpose of uniformly lubricating the faceplate bearing, eccentric sleeve counterweight, movable scroll bearing and movable scroll.

[0006] The utility model discloses a high oil return electric compressor faceplate, comprising a faceplate body and a faceplate surface, an eccentric sleeve shaft hole and a bearing hole fixedly arranged on the inner side of the faceplate body from top to bottom; the faceplate surface contacts the movable scroll of the compressor, the inner wall of the eccentric sleeve shaft hole is matched with the eccentric sleeve counterweight clearance of the compressor, and the inner wall of the bearing hole is detachably connected to the faceplate bearing.

[0007] A plurality of air intake channels are provided at the connection between the faceplate surface and the inner side of the faceplate body, for the orbiting scroll and the stationary scroll of the compressor to inhale gas.

[0008] The face of the faceplate is provided with grooves which are connected to the air intake passage and are used to replenish the oil centrifugally thrown out by the eccentric sleeve counterweight along the grooves to the vortex air intake port on the periphery of the compression chamber formed by the orbiting scroll and the static scroll of the compressor, thereby ensuring that more oil flows back to the compressor system.

[0009] As a further improvement of the present invention, a sealing ring groove is provided on the top of the faceplate body for installing a sealing ring located at the connection between the faceplate body and the compressor assembly to ensure that oil does not leak from the connection.

[0010] As a further improvement of the present invention, a plurality of positioning pin holes are opened on the faceplate surface at the periphery of the eccentric sleeve shaft hole to ensure accurate installation of the faceplate body and the compressor assembly.

[0011] As a further improvement of the present invention, a connection hole is opened on the outer periphery of the faceplate body for detachably connecting the faceplate body to the compressor assembly.

[0012] As a further improvement of the present invention, the grooves are a plurality of square grooves evenly distributed on the faceplate surface around the eccentric sleeve shaft hole.

[0013] As a further improvement of the present invention, the width and depth of the groove are both no greater than 3 mm.

[0014] As a further improvement of the present invention, the groove includes an annular groove and a straight groove. The center of the annular groove is the center of the faceplate surface. One end of the straight groove is connected to the annular groove, and the other end is connected to the suction channel.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: a high-oil-return electric compressor faceplate of the present invention increases the storage space and reflux path of the oil by arranging a number of grooves on the faceplate surface, thereby achieving the purpose of lubricating the faceplate bearing, eccentric sleeve, movable scroll bearing and movable scroll, reducing friction and thus achieving the effect of noise reduction and improving performance; by arranging grooves evenly distributed around the eccentric sleeve shaft hole, the oil on the faceplate surface can evenly reflux and diffuse to lubricate the faceplate bearing, eccentric sleeve counterweight, movable scroll bearing and movable scroll, thereby improving the stability of the compressor operation; by connecting the grooves to the intake channel, the oil can be sucked into the compression chamber along with the airflow, thereby achieving the effect of cooling the interior of the compression chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 This is a schematic diagram of a half-section structure of the present utility model;

[0018] Figure 3 This is a structural diagram of embodiment 2 of the present utility model.

[0019] Description of the numbers in the figure:

[0020] 1 faceplate body, 11 sealing ring groove, 12 connecting hole, 2 faceplate surface, 21 suction channel, 22 groove, 221 ring groove, 222 straight groove, 23 positioning pin hole, 3 eccentric sleeve shaft hole, 4 bearing hole. DETAILED DESCRIPTION

[0021] Specific embodiment 1: Please refer to Figure 1-2 A high oil return electric compressor faceplate comprises a faceplate body 1 and a faceplate surface 2, an eccentric sleeve shaft hole 3 and a bearing hole 4 fixed on the inner side of the faceplate body 1 from top to bottom; the faceplate surface 2 contacts the movable scroll of the compressor, the inner wall of the eccentric sleeve shaft hole 3 is clearance-matched with the eccentric sleeve counterweight of the compressor, and the inner wall of the bearing hole 4 is detachably connected to the faceplate bearing; the eccentric shaft drives the eccentric sleeve counterweight to rotate inside the eccentric sleeve shaft hole 3, so as to balance the deflection caused by the rotation of the movable scroll and maintain the stable operation of the compressor.

[0022] A plurality of air intake channels 21 are provided at the connection between the faceplate surface 2 and the inner side of the faceplate body 1 for the orbiting scroll and the fixed scroll of the compressor to inhale gas.

[0023] The faceplate surface 2 is provided with a groove 22, which is connected to the air intake channel 21, and is used to replenish the oil centrifugally thrown out by the eccentric sleeve counterweight along the groove 22 to the vortex air intake port on the periphery of the compression chamber formed by the orbiting scroll and the static scroll of the compressor, thereby ensuring that more oil flows back to the compressor system, reducing oil waste and sucking the oil into the compressor along with the gas to achieve a cooling effect.

[0024] Specifically, a sealing ring groove 11 is formed on the top of the faceplate body 1 for installing a sealing ring at the connection between the faceplate body 1 and the compressor assembly to ensure that oil does not leak from the connection.

[0025] Specifically, the faceplate surface 2 has several positioning pin holes 23 on the periphery of the eccentric sleeve shaft hole 3, which are used to ensure the precise installation of the faceplate body 1 and the compressor assembly, effectively preventing the faceplate body 1 from moving or displacing relative to each other due to vibration during the use of the compressor, and improving the stability of the compressor operation.

[0026] Specifically, a connection hole 12 is formed on the outer periphery of the faceplate body 1 for detachably connecting the faceplate body 1 to the compressor assembly.

[0027] Specifically, the grooves 22 may be twelve square grooves evenly distributed on the faceplate surface 2 around the eccentric sleeve shaft hole 3 , with an interval of 30° between adjacent grooves 22 , for evenly lubricating the faceplate surface 2 .

[0028] Specifically, the width and depth of the groove 22 may both be 2 mm, and the length may be 19 mm.

[0029] During use, part of the lubricating oil in the compression chamber formed by the movable scroll and the static scroll of the compressor enters the eccentric sleeve shaft hole 3 and the bearing hole 4 through the disc surface 2, lubricating the gap between the eccentric sleeve counterweight and the eccentric sleeve shaft hole 3 and the disc bearing. During the rotation of the eccentric sleeve counterweight, the oil is centrifugally thrown out and enters the evenly distributed grooves 22 connected to the intake channel 21. The grooves 22 can be used as a storage space for the oil and a path for returning to the eccentric sleeve shaft hole 3, lubricating the disc surface 2, the disc bearing and the eccentric sleeve counterweight evenly, avoiding insufficient lubrication due to low local oil return volume, resulting in wear and noise; at the same time, since the grooves 22 are connected to the intake channel 21, the intake channel 21 will inhale some oil droplets during the intake process, thereby achieving the effect of cooling the compression chamber and ensuring the smooth operation of the compressor.

[0030] Specific embodiment 2: Please refer to Figure 3 A high oil return electric compressor faceplate, the faceplate surface 2 is provided with grooves 22, which are different from the first embodiment in that the grooves 22 are no longer twelve square grooves evenly distributed around the eccentric sleeve shaft hole, but a group of connected annular grooves 221 and straight grooves 222. This embodiment simplifies the turning process of the faceplate surface 2 and can achieve the purpose of providing an oil return channel; the center of the annular groove 221 is the center of the faceplate surface 2, and one end of the straight groove 222 is connected to the annular groove 221, and the other end is connected to the suction channel 21.

[0031] Specifically, the annular groove 221 may be a ring with an outer diameter of 84 mm and an inner diameter of 82 mm, and may have a depth of 2 mm. The width and depth of the straight groove 222 may both be 2 mm, and the length may be 4.75 mm.

[0032] During use, part of the lubricating oil in the compression chamber formed by the movable scroll and the static scroll of the compressor enters the eccentric sleeve shaft hole 3 and the bearing hole 4 through the disc surface 2, lubricating the gap between the eccentric sleeve counterweight and the eccentric sleeve shaft hole 3 and the disc bearing, and the oil enters the annular groove 221 connected to the suction channel 21 through the straight groove 222. The annular groove 221 can be used as a storage space for oil to evenly lubricate the disc surface 2, the disc bearing and the eccentric sleeve counterweight, avoiding insufficient lubrication due to low local oil return volume, resulting in wear and noise; at the same time, since the groove 22 is connected to the suction channel 21, the suction channel 21 will inhale some oil droplets during the suction process, thereby achieving the effect of cooling the compression chamber and ensuring the smooth operation of the compressor.

[0033] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed in the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A high oil return electric compressor faceplate, characterized in that: The faceplate comprises a faceplate body (1), and a faceplate surface (2), an eccentric sleeve shaft hole (3), and a bearing hole (4) which are fixedly arranged on the inner side of the faceplate body (1) in order from top to bottom; the faceplate surface (2) contacts the movable scroll of the compressor, the inner wall of the eccentric sleeve shaft hole (3) is clearance-matched with the eccentric sleeve counterweight of the compressor, and the inner wall of the bearing hole (4) is detachably connected to the faceplate bearing; A plurality of air intake channels (21) are provided at the connection between the faceplate surface (2) and the inner side of the faceplate body (1), for inhaling gas into the compression chamber formed by the orbiting scroll and the stationary scroll of the compressor; The faceplate surface (2) is provided with a groove (22), which is connected to the air intake passage (21) and is used to replenish the oil centrifugally thrown out by the eccentric sleeve counterweight along the groove (22) to the vortex air intake port at the periphery of the compression chamber formed by the orbiting scroll and the stationary scroll of the compressor.

2. A high oil return electric compressor faceplate according to claim 1, characterized in that: The top of the faceplate body (1) is provided with a sealing ring groove (11) for installing a sealing ring.

3. The high oil return electric compressor faceplate according to claim 1, characterized in that: The faceplate surface (2) is provided with a plurality of positioning pin holes (23) on the outer periphery of the eccentric sleeve shaft hole (3) for ensuring accurate installation of the faceplate body and the compressor assembly.

4. The high oil return electric compressor faceplate according to claim 1, characterized in that: The faceplate body (1) is provided with a connection hole (12) on its outer periphery for detachably connecting the faceplate body (1) to a compressor assembly.

5. The high oil return electric compressor faceplate according to claim 1, characterized in that: The grooves (22) are a plurality of square grooves evenly distributed around the eccentric sleeve shaft hole (3) on the faceplate surface (2).

6. A high oil return electric compressor faceplate according to claim 5, characterized in that: The width and depth of the groove (22) are both no greater than 3 mm.

7. The high oil return electric compressor faceplate according to claim 1, characterized in that: The groove (22) comprises an annular groove (221) and a straight groove (222); the center of the annular groove (221) is the center of the faceplate surface (2); one end of the straight groove (222) is in communication with the annular groove (221), and the other end is in communication with the air suction channel (21).

Images