Rotor assembly, motor and compressor
By using an oil baffle and a balance block in the compressor to form a ring-shaped structure, the problem of oil cutting caused by the eccentric rotation of the rotor is solved, achieving smooth oil return and noise reduction, and improving the overall performance of the compressor.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- PANASONIC WANBAO GUANGZHOU COMPRESSOR
- Filing Date
- 2025-03-20
- Publication Date
- 2026-04-14
AI Technical Summary
In existing compressors, the vibration caused by the unbalanced force and torque generated by the eccentric rotation of the rotor is aggravated, which leads to the cutting of the oil mixture and the generation of pulsating noise. In addition, the small oil droplets fall slowly, which can easily lead to oil shortage at the bottom of the compressor.
The oil baffle and the balance block are radially matched to form a ring structure. The oil baffle has an internal hollow shell design, which reduces the degree to which the oil mixture is cut, promotes the return of refrigeration oil to the bottom of the compressor, and improves oil circulation.
It effectively reduces pulsating noise, improves the oil circulation efficiency of the compressor, reduces the cutting of large oil particles, ensures the normal return of refrigeration oil, and improves the overall performance of the machine.
Smart Images
Figure CN224124000U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of compressor technology, and in particular to a rotor assembly, a motor and a compressor. Background Technology
[0002] A compressor generally consists of a housing, a motor fixed inside the housing that provides rotational power, and a pump body for compressing the refrigerant. The motor mainly consists of a stator and a rotor. During motor operation, the unbalanced force and torque generated by the eccentric rotation of the rotor cause increased compressor vibration and waste power. Therefore, to reduce the adverse effects of unbalanced forces, arc-shaped balance weights are usually added to the upper and lower end faces of the rotor to reduce these unbalanced forces.
[0003] When an air conditioning system operates under high load, the oil level in the compressor is generally used to determine its performance. The circulation of refrigerant oil inside the compressor is as follows: the centrifugal force generated by the high-speed rotation of the crankshaft driven by the rotor, along with the pressure difference above and below the oil level, pumps the refrigerant oil from the oil sump to the various oil outlets on the crankshaft. This allows the refrigerant oil to enter the pump body structure and lubricate, cool, and seal the components of the pump body. During this process, the refrigerant oil enters the cylinder through the crankshaft, rotor end face, and upper and lower bearings, where it mixes with the refrigerant. During compression, it is discharged from the pump body along with the refrigerant, and then flows through the stator and rotor air gap of the motor, and finally to the upper part of the motor. When the oil-gas mixture discharged from the pump body is sprayed upwards, the height difference between the arc-shaped balance block and the bottom of the rotor causes the balance block to cut the oil-gas mixture under high-speed rotation, resulting in problems such as pulsating noise. At the same time, large oil particles are cut into smaller oil particles and thrown onto the casing wall. Since the oil return inside the compressor mainly relies on the gravity of the refrigeration oil, the falling speed of small oil particles is significantly lower than that of large oil particles, which can easily lead to the problem of oil shortage at the bottom of the compressor. Utility Model Content
[0004] Therefore, the purpose of this utility model is to overcome the shortcomings of the prior art and provide a rotor assembly, a motor, and a compressor. According to embodiments of this utility model, the rotor assembly, motor, and compressor, through the radial cooperation between the oil baffle and the balance block, effectively reduce the degree of cutting of the oil mixture, thereby promoting the refrigeration oil to descend and flow back to the bottom of the compressor, effectively improving oil circulation inside the compressor and reducing pulsating noise.
[0005] To achieve the above objectives, a first aspect of this utility model provides a rotor assembly, including a rotor body, a balance block, and an oil baffle. The rotor body has an oil return channel extending through it along its axial direction. The balance block and the oil baffle are disposed on the end face of the rotor body, and the balance block and the oil baffle cooperate to form an annular structure. The annular structure is located between the edge of the oil return channel and the end face of the rotor body. The end face of the annular structure away from the rotor body is parallel to the end face of the rotor body. The oil baffle is a hollow shell structure.
[0006] Therefore, in the rotor assembly according to this utility model embodiment, the oil baffle, through its hollow shell design, ensures that when the oil baffle and the balance block are fitted together on the end face of the rotor body, the weight of the oil baffle itself has little impact on the balance block, thus ensuring that the balance block can reduce unbalanced forces. Furthermore, by placing the balance block and the oil baffle between the oil return channel and the outer wall of the rotor body, the unobstructed flow of the oil return channel is ensured. In addition, the circular structure formed by the oil baffle and the balance block in the radial direction in this utility model embodiment not only effectively reduces the degree of cutting of large oil particles, but also improves the circulation efficiency of the refrigeration oil inside the compressor, effectively reduces pulsating noise, and improves the overall performance of the machine.
[0007] In one embodiment, the balance block has an arc-shaped structure, and the angle between the two ends of the balance block in the circumferential direction and its center is less than 180°.
[0008] In one embodiment, the oil baffle has an arc-shaped structure, with the angle between its two ends in the circumferential direction and its center being greater than 180°, and the two ends of the oil baffle in the circumferential direction respectively abutting against the two ends of the balance block in the circumferential direction.
[0009] In one embodiment, the oil baffle is a ring-shaped structure, and an clearance groove is provided through the oil baffle along its axial direction. The shape of the clearance groove is adapted to the shape of the balance block. The balance block is located in the clearance groove, and the balance block and the clearance groove form a clearance fit.
[0010] In one embodiment, the oil baffle is a ring-shaped structure, and the end face of the oil baffle connected to the rotor body is recessed in the axial direction to form a groove. The shape of the groove is adapted to the shape of the balance block, and the groove covers the balance block.
[0011] In one embodiment, the oil baffle has a first rivet hole extending through it along its axial direction. The first rivet hole is used for rivet insertion to fix the oil baffle to the rotor body. This can be understood as the oil baffle being riveted to the end face of the rotor body to ensure a firm and reliable connection between the oil baffle and the rotor body, preventing it from easily falling off.
[0012] In one embodiment, the balance block has a second rivet hole extending through it along its axial direction. The second rivet hole is used for rivets to pass through, thereby fixing the balance block to the rotor body. This can be understood as the balance block being fixed to the end face of the rotor body by rivets, ensuring a firm and reliable connection between the balance block and the rotor body, preventing it from easily falling off.
[0013] In one embodiment, the oil baffle is made of plastic.
[0014] A second aspect of this utility model provides an electric motor comprising any of the rotor assemblies described above. According to this utility model embodiment, the motor, through the radial cooperation between the oil baffle and the balance block, effectively reduces the degree of cutting of the oil mixture, thereby promoting the refrigeration oil to descend and flow back to the bottom of the compressor, effectively improving oil circulation inside the compressor and reducing pulsating noise.
[0015] A third aspect of this utility model provides a compressor comprising any of the motors described above. According to this utility model, the compressor, through the radial cooperation between the oil baffle and the balance block, effectively reduces the degree of oil mixture cutting, thereby promoting the refrigeration oil to descend and flow back to the bottom of the compressor, effectively improving oil circulation inside the compressor and reducing pulsating noise.
[0016] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description
[0017] Figure 1 This is one of the structural schematic diagrams of the rotor assembly according to an embodiment of the present utility model;
[0018] Figure 2 This is a second schematic diagram of the rotor assembly according to an embodiment of the present utility model;
[0019] Figure 3 This is the third schematic diagram of the rotor assembly according to an embodiment of the present utility model;
[0020] Figure 4 This is one of the structural schematic diagrams of the oil baffle component according to an embodiment of the present utility model;
[0021] Figure 5 This is a second schematic diagram of the structure of the oil baffle component according to an embodiment of the present utility model;
[0022] Figure 6 This is the fourth schematic diagram of the rotor assembly according to an embodiment of the present utility model;
[0023] Figure 7 This is the fifth schematic diagram of the rotor assembly according to an embodiment of the present utility model;
[0024] Figure 8 This is the third schematic diagram of the structure of the oil baffle component according to an embodiment of this utility model;
[0025] Figure 9 This is the fourth structural schematic diagram of the oil baffle component according to an embodiment of the present utility model;
[0026] Figure 10 This is the sixth schematic diagram of the rotor assembly according to an embodiment of the present utility model;
[0027] Figure 11 This is the seventh schematic diagram of the rotor assembly according to an embodiment of the present utility model;
[0028] Figure 12 This is the fifth schematic diagram of the structure of the oil baffle component according to an embodiment of the present utility model;
[0029] Figure 13 This is the sixth schematic diagram of the oil baffle component in an embodiment of this utility model.
[0030] Explanation of reference numerals in the attached drawings: 10, rotor body; 11, oil return channel; 20, balance block; 21, second rivet hole; 30, oil baffle; 31, first rivet hole; 32, clearance groove; 33, groove. Detailed Implementation
[0031] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention.
[0032] In related technologies, air conditioning systems typically determine high-load operation based on the compressor's oil level. The circulation of refrigerant oil inside the compressor is as follows: the centrifugal force generated by the high-speed rotation of the crankshaft driven by the rotor, along with the pressure difference above and below the oil level, pumps the refrigerant oil from the oil sump to the various oil outlets on the crankshaft. This allows the refrigerant oil to enter the pump body structure, lubricating, cooling, and sealing the pump body components. During this process, the refrigerant oil enters the cylinder through the crankshaft, rotor end face, and upper and lower bearings, where it mixes with the refrigerant. During compression, it is discharged from the pump body along with the refrigerant, and then flows through the stator and rotor air gap of the motor, and finally to the upper part of the motor. When the oil-gas mixture discharged from the pump body is sprayed upwards, the height difference between the arc-shaped balance block and the bottom of the rotor causes the balance block to cut the oil-gas mixture under high-speed rotation, resulting in problems such as pulsating noise. At the same time, large oil particles are cut into smaller oil particles and thrown onto the casing wall. Since the oil return inside the compressor mainly relies on the gravity of the refrigeration oil, the falling speed of small oil particles is significantly lower than that of large oil particles, which can easily lead to the problem of oil shortage at the bottom of the compressor.
[0033] In view of this, the present invention provides a rotor assembly, a motor and a compressor. According to the rotor assembly and compressor of the present invention, the radial cooperation between the oil baffle 30 and the balance block 20 effectively reduces the degree of cutting of the oil mixture, thereby promoting the refrigeration oil to flow back to the bottom of the compressor, effectively improving the oil circulation inside the compressor and reducing pulsating noise.
[0034] Please see Figures 1 to 13 The first aspect of this utility model provides a rotor assembly, including a rotor body 10, a balance block 20, and an oil baffle 30. The rotor body 10 has an oil return channel 11 extending through it along its axial direction. The balance block 20 and the oil baffle 30 are disposed on the end face of the rotor body 10, and the balance block 20 and the oil baffle 30 cooperate to form a ring structure. The ring structure is located between the edge of the oil return channel 11 and the end face of the rotor body 10. The end face of the ring structure away from the rotor body 10 is parallel to the end face of the rotor body 10. The oil baffle 30 is a hollow shell structure.
[0035] Therefore, according to the rotor assembly of this utility model embodiment, the oil baffle 30, through its hollow shell design, ensures that when the oil baffle 30 and the balance block 20 are fitted together on the end face of the rotor body 10, the weight of the oil baffle 30 itself has little impact on the balance block 20, thus ensuring that the balance block 20 can reduce unbalanced forces. Furthermore, by placing the balance block 20 and the oil baffle 30 between the oil return channel 11 and the outer wall of the rotor body 10, the unobstructed flow of the oil return channel 11 is ensured. In addition, the circular structure formed by the oil baffle 30 and the balance block 20 in the radial direction in this utility model embodiment not only effectively reduces the degree of cutting of large oil particles, but also improves the circulation efficiency of the refrigeration oil inside the compressor, effectively reduces pulsating noise, and improves the overall performance of the machine.
[0036] In this embodiment of the invention, the oil-blocking component 30 may be, but is not limited to, made of plastic. For example, in some other embodiments, the oil-blocking component 30 may also be made of lightweight aluminum.
[0037] Optionally, in some embodiments of this utility model, the balance block 20 has an arc-shaped structure, and the angle between the two ends of the balance block 20 in the circumferential direction and its center is less than 180°. In these embodiments, the oil baffle 30 has an arc-shaped structure, and the angle between the two ends of the oil baffle 30 in the circumferential direction and its center is greater than 180°, and the two ends of the oil baffle 30 in the circumferential direction respectively abut against the two ends of the balance block 20 in the circumferential direction. It can be understood that in these embodiments, the two ends of the balance block 20 in the circumferential direction and the two ends of the oil baffle 30 in the circumferential direction form an abutment fit, and the end face of the balance block 20 away from the rotor body 10 and the end face of the oil baffle 30 away from the rotor body 10 are located on a plane parallel to the end face of the rotor body 10. In this way, when the balance block 20 and the oil baffle 30 rotate at high speed with the rotor body 10, the annular structure formed by the balance block 20 and the oil baffle 30 greatly reduces the cutting phenomenon of large oil particles in the radial direction.
[0038] Optionally, in some embodiments of this utility model, the balance block 20 has an arc-shaped structure, and the angle between the two ends of the balance block 20 and its center in the circumferential direction is less than 180°. In these embodiments, the oil baffle 30 has an annular structure, and the oil baffle 30 has a relief groove 32 extending through it in the axial direction. The shape of the relief groove 32 is adapted to the shape of the balance block 20, the balance block 20 is located in the relief groove 32, and the balance block 20 and the relief groove 32 form a clearance fit. In these embodiments, the oil baffle 30 is designed as a ring-shaped structure, which avoids the balance block 20 through the axially through-hole design of the clearance groove 32, so that the balance block 20 is located in the clearance groove 32, and the end face of the balance block 20 away from the rotor body 10 and the end face of the oil baffle 30 away from the rotor body 10 are located on a plane parallel to the end face of the rotor body 10. In this way, when the balance block 20 and the oil baffle 30 rotate at high speed with the rotor body 10, the ring-shaped structure formed by the balance block 20 and the oil baffle 30 greatly reduces the cutting of large oil particles in the radial direction.
[0039] Optionally, in some embodiments of this utility model, the balance block 20 has an arc-shaped structure, and the angle between the two ends of the balance block 20 and its center in the circumferential direction is less than 180°. In these embodiments, the oil baffle 30 has an annular structure, and the end face of the oil baffle 30 connected to the rotor body 10 is recessed in the axial direction to form a groove 33. The shape of the groove 33 is adapted to the shape of the balance block 20, and the groove 33 covers the balance block 20. In these embodiments, the oil baffle 30 is designed as a ring-shaped structure, and is covered by the axially recessed groove 33 on the balance block 20 so that the oil baffle 30 can be installed on the rotor body 10. In this way, the balance block 20 is housed and hidden in the oil baffle 30, and the end face of the oil baffle 30 away from the rotor body 10 is parallel to the end face of the rotor body 10. When the balance block 20 and the oil baffle 30 rotate at high speed with the rotor body 10, the ring-shaped structure formed by the balance block 20 and the oil baffle 30 greatly reduces the cutting of large oil particles in the radial direction.
[0040] It is worth understanding that the central angle of the balance block 20 of this utility model is not limited to the angle of any of the above embodiments. In some other embodiments, the central angle of the balance block 20 can also be adaptively adjusted to be greater than or equal to 180° as needed.
[0041] Optionally, in some embodiments of this utility model, the oil baffle 30 has a first rivet hole 31 extending through it along its axial direction. The first rivet hole 31 is used for rivets to pass through so that the oil baffle 30 is fixed to the rotor body 10. In these embodiments, the oil baffle 30 is set on the end face of the rotor body 10 by rivets so that the connection between the oil baffle 30 and the rotor body 10 is firm and reliable and not easy to fall off.
[0042] Optionally, in some embodiments of this utility model, the balance block 20 has a second rivet hole 21 extending through it along its axial direction. The second rivet hole 21 is used for rivets to pass through so that the balance block 20 is fixed to the rotor body 10. In these embodiments, the balance block 20 is set on the end face of the rotor body 10 by rivets so that the connection between the balance block 20 and the rotor body 10 is firm and reliable and not easy to fall off.
[0043] The following is combined Figures 1 to 5 The following is a detailed description of a specific embodiment of the rotor assembly according to the present invention. It is worth understanding that the following embodiment is merely illustrative and should not be construed as limiting the present invention.
[0044] This embodiment provides a rotor assembly, including a rotor body 10, a balance block 20, and an oil baffle 30. The rotor body 10 has an oil return channel 11 extending through it along its axial direction. The balance block 20 and the oil baffle 30 are disposed on the end face of the rotor body 10, and the balance block 20 and the oil baffle 30 cooperate to form a ring-shaped structure. The ring-shaped structure is located between the edges of the oil return channel 11 and the end face of the rotor body 10. The end face of the ring-shaped structure away from the rotor body 10 is parallel to the end face of the rotor body 10. The oil baffle 30 is a hollow shell structure. The oil baffle 30 is made of plastic.
[0045] In this embodiment, the balance block 20 has an arc-shaped structure, and the angle between the two ends of the balance block 20 in the circumferential direction and its center is less than 180°. Correspondingly, the oil baffle 30 has an arc-shaped structure, and the angle between the two ends of the oil baffle 30 in the circumferential direction and its center is greater than 180°, and the two ends of the oil baffle 30 in the circumferential direction respectively abut against the two ends of the balance block 20 in the circumferential direction.
[0046] In addition, the oil baffle 30 of this embodiment has a first rivet hole 31 through it in the axial direction. The first rivet hole 31 is used for rivets to pass through so that the oil baffle 30 is fixed on the rotor body 10. The balance block 20 has a second rivet hole 21 through it in the axial direction. The second rivet hole 21 is used for rivets to pass through so that the balance block 20 is fixed on the rotor body 10.
[0047] The following is combined Figures 6 to 9 The following is a detailed description of a specific embodiment of the rotor assembly according to the present invention. It is worth understanding that the following embodiment is merely illustrative and should not be construed as limiting the present invention.
[0048] This embodiment provides a rotor assembly, including a rotor body 10, a balance block 20, and an oil baffle 30. The rotor body 10 has an oil return channel 11 extending through it along its axial direction. The balance block 20 and the oil baffle 30 are disposed on the end face of the rotor body 10, and the balance block 20 and the oil baffle 30 cooperate to form a ring-shaped structure. The ring-shaped structure is located between the edges of the oil return channel 11 and the end face of the rotor body 10. The end face of the ring-shaped structure away from the rotor body 10 is parallel to the end face of the rotor body 10. The oil baffle 30 is a hollow shell structure. The oil baffle 30 is made of plastic.
[0049] In this embodiment, the balance block 20 has an arc-shaped structure, and the angle between the two ends of the balance block 20 and its center in the circumferential direction is less than 180°. In addition, the oil baffle 30 has an annular structure, and the oil baffle 30 has a relief groove 32 extending through it in the axial direction. The shape of the relief groove 32 is adapted to the shape of the balance block 20, the balance block 20 is located in the relief groove 32, and the balance block 20 and the relief groove 32 form a clearance fit.
[0050] In addition, the oil baffle 30 of this embodiment has a first rivet hole 31 through it in the axial direction. The first rivet hole 31 is used for rivets to pass through so that the oil baffle 30 is fixed on the rotor body 10. The balance block 20 has a second rivet hole 21 through it in the axial direction. The second rivet hole 21 is used for rivets to pass through so that the balance block 20 is fixed on the rotor body 10.
[0051] The following is combined Figures 10 to 13 The following is a detailed description of a specific embodiment of the rotor assembly according to the present invention. It is worth understanding that the following embodiment is merely illustrative and should not be construed as limiting the present invention.
[0052] This embodiment provides a rotor assembly, including a rotor body 10, a balance block 20, and an oil baffle 30. The rotor body 10 has an oil return channel 11 extending through it along its axial direction. The balance block 20 and the oil baffle 30 are disposed on the end face of the rotor body 10, and the balance block 20 and the oil baffle 30 cooperate to form a ring-shaped structure. The ring-shaped structure is located between the edges of the oil return channel 11 and the end face of the rotor body 10. The end face of the ring-shaped structure away from the rotor body 10 is parallel to the end face of the rotor body 10. The oil baffle 30 is a hollow shell structure. The oil baffle 30 is made of plastic.
[0053] In this embodiment, the balance block 20 has an arc-shaped structure, and the angle between the two ends of the balance block 20 and its center in the circumferential direction is less than 180°. In addition, the oil baffle 30 has an annular structure, and the end face of the oil baffle 30 connected to the rotor body 10 is recessed in the axial direction to form a groove 33. The shape of the groove 33 is adapted to the shape of the balance block 20, and the groove 33 covers the balance block 20.
[0054] Furthermore, in this embodiment, the oil baffle 30 has a first rivet hole 31 extending through it in the axial direction. The first rivet hole 31 is used for rivets to pass through so that the oil baffle 30 is fixed to the rotor body 10. The balance block 20 has a second rivet hole 21 extending through it in the axial direction. The second rivet hole 21 is used for rivets to pass through so that the balance block 20 is fixed to the rotor body 10. In order to further fix the oil baffle 30, a first rivet hole 31 is also provided in the groove of the oil baffle 30, and the first rivet hole 31 in the groove 33 corresponds to the second rivet hole 21 of the balance block 20. In this way, the rivet can pass through the first rivet hole 31 and the second rivet hole 32 before being inserted into the rotor body 10, so that the oil baffle 30 and the balance block 20 are more firmly set on the rotor body 10.
[0055] A second aspect of this utility model provides an electric motor comprising any of the rotor assemblies described above. According to this utility model embodiment, the motor, through the radial cooperation between the oil baffle 30 and the balance block 20, effectively reduces the degree of cutting of the oil mixture, thereby promoting the refrigeration oil to descend and flow back to the bottom of the compressor, effectively improving oil circulation inside the compressor and reducing pulsating noise.
[0056] A third aspect of this utility model provides a compressor that includes any of the motors described above. According to this utility model, the compressor effectively reduces the degree of oil-liquid mixture cutting through the radial cooperation between the oil baffle 30 and the balance block 20, thereby promoting the refrigeration oil to descend and flow back to the bottom of the compressor, effectively improving oil circulation inside the compressor and reducing pulsating noise.
[0057] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this utility model.
[0058] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the rotor assembly, motor, and compressor of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.
Claims
1. A rotor assembly, characterized in that: The device includes a rotor body, a balance block, and an oil baffle. The rotor body has an oil return channel extending through it along its axial direction. The balance block and the oil baffle are disposed on the end face of the rotor body, and the balance block and the oil baffle cooperate to form a ring-shaped structure. The ring-shaped structure is located between the edge of the oil return channel and the end face of the rotor body, and the end face of the ring-shaped structure away from the rotor body is parallel to the end face of the rotor body. The oil baffle is a hollow shell structure.
2. The rotor assembly according to claim 1, characterized in that: The balance block has an arc-shaped structure, and the angle between the two ends of the balance block and its center in the circumferential direction is less than 180°.
3. The rotor assembly according to claim 2, characterized in that: The oil baffle has an arc-shaped structure, and the angle between the two ends of the oil baffle and its center in the circumferential direction is greater than 180°. The two ends of the oil baffle in the circumferential direction respectively abut against the two ends of the balance block in the circumferential direction.
4. The rotor assembly according to claim 2, characterized in that: The oil baffle is a ring-shaped structure, and an clearance groove is provided through the oil baffle along its axial direction. The shape of the clearance groove is adapted to the shape of the balance block. The balance block is located in the clearance groove, and the balance block and the clearance groove form a clearance fit.
5. The rotor assembly according to claim 2, characterized in that: The oil baffle is a ring-shaped structure. The end face of the oil baffle connected to the rotor body is recessed in the axial direction to form a groove. The shape of the groove is adapted to the shape of the balance block, and the groove covers the balance block.
6. The rotor assembly according to claim 1, characterized in that: The oil baffle has a first rivet hole extending through it along its axial direction. The first rivet hole is used for rivets to pass through so that the oil baffle is fixed to the rotor body.
7. The rotor assembly according to claim 1, characterized in that: The balance block has a second rivet hole through it along its axial direction. The second rivet hole is used for rivets to pass through so that the balance block is fixed to the rotor body.
8. The rotor assembly according to claim 1, characterized in that: The oil baffle is made of plastic.
9. An electric motor, characterized in that: Includes the rotor assembly as described in any one of claims 1 to 8.
10. A compressor, characterized in that: Includes the motor as described in claim 9.