Rotor structure, motor and compressor
By improving the structure and installation position of the balance block and setting it between the magnet slot of the rotor core, the problem of magnetic leakage in the compressor is solved, and the use of low-cost magnetic permeable materials is achieved while avoiding magnetic leakage, reducing costs and improving performance.
Patent Information
- Application Number
- CN202422077966.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-08-26
AI Technical Summary
In the prior art, the balance block of the compressor covers the magnet of the motor rotor due to axial projection, resulting in magnetic leakage between the motor rotor and the balance block, and thus, it is necessary to use expensive non-magnetic materials to avoid magnetic leakage, which increases the cost.
By improving the structure of the balance block and the installation position between the balance block and the rotor core, the two inner sides of the balance block are separated from the outer sides of the magnet groove, and ensuring that the axial projection of the balance block does not cover the adjacent magnet groove, thereby avoiding magnetic leakage.
While using low-cost magnetic permeable materials, it is possible to effectively avoid magnetic leakage between the rotor core and the balance block, reduce material costs and improve the performance of the compressor.
Smart Images
Figure CN223007423U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of compressors, in particular to a rotor structure, an electric motor and a compressor. Background Art
[0002] The crankshaft of a rotary compressor is driven by a motor, and the refrigerant gas is compressed by driving a ring through an eccentric part. When the eccentric part rotates around the center of the crankshaft, a centrifugal force is generated, causing large vibration of the compressor. A balance weight is arranged on the axial end face of the motor rotor, and the centrifugal force generated by the balance weight balances the centrifugal force generated by the eccentric part of the pump body, reducing the vibration of the compressor.
[0003] However, in order to reduce the manufacturing cost of the balance weight, the balance weight is usually made of a material with magnetic conductivity characteristics. However, when the balance weight is abutted and arranged on the axial end face of the motor rotor, its axial projection covers the magnet on the motor rotor, resulting in magnetic leakage between the motor rotor and the balance weight. Therefore, in order to avoid magnetic leakage, the balance weight is changed to an expensive material with very low magnetic permeability or non-magnetic conductivity, such as stainless steel material, with high cost. Summary of the Utility Model
[0004] Based on this, the purpose of the utility model is to overcome the deficiencies of the prior art, and provide a rotor structure, an electric motor and a compressor. According to the rotor structure, the electric motor and the compressor of the embodiment of the utility model, by improving the structure of the balance weight and the installation position between the balance weight and the rotor core, while using a magnetic conductive material with lower cost, the magnetic leakage phenomenon between the rotor core and the balance weight can be effectively avoided.
[0005] In order to achieve the above purpose, the first aspect of the embodiment of the utility model provides a rotor structure, including a rotor core and a balance weight. A plurality of pairs of magnet slots are arranged on the rotor core at intervals along the circumferential direction of the rotor core. The shape of each pair of magnet slots is V-shaped, and the openings of each pair of magnet slots open outwards along the radial direction; the balance weight is fan-shaped, the balance weight is arranged on the end face of the rotor core, the balance weight is located between the outside of one pair of magnet slots and the outside of the rotor core, and the projection of the balance weight in the axial direction does not cover the adjacent pair of magnet slots.
[0006] Thus, according to the rotor structure of the embodiment of the present invention, by improving the structure of the balance weight and its installation position with respect to the rotor core, the two inner sides of the balance weight are spaced apart from the outer sides of one pair of magnet slots, and the projection of the balance weight in the axial direction does not cover a pair of adjacent magnet slots; in this way, since the balance weight and the magnet slots are spaced apart, it is possible to avoid magnetic leakage between the rotor core and the balance weight caused by the balance weight covering the magnets. Therefore, the balance weight of the embodiment of the present invention can be made of a magnetic conductive material with a lower cost, which can not only reduce the material cost but also avoid magnetic leakage.
[0007] As an implementation manner, the outer side surface of the balance weight is an arc surface, and both inner side surfaces of the balance weight are flat surfaces.
[0008] As an implementation manner, the balance weight includes a plurality of single pieces stacked, and each single piece is made of a magnetic conductive material.
[0009] As an implementation manner, the rotor core includes a plurality of rotor sheets stacked, and each rotor sheet is made of a magnetic conductive material.
[0010] As an implementation manner, the balance weight is axially provided with a rivet through hole.
[0011] As an implementation manner, the balance weight is fixed on the rotor core by a rivet passing through the rivet through hole.
[0012] As an implementation manner, an end plate is provided on the end surface of the rotor core, the end plate covers a plurality of pairs of magnet slots, and a notch is provided on the outer periphery of the end plate that abuts against the two inner side surfaces of the balance weight.
[0013] The second aspect of the embodiment of the present invention provides a motor, including the rotor structure according to any of the above embodiments. According to the motor of the embodiment of the present invention, by improving the structure of the balance weight and the installation position between the balance weight and the rotor core, while using a magnetic conductive material with a lower cost, the magnetic leakage phenomenon between the rotor core and the balance weight can be effectively avoided.
[0014] The third aspect of the embodiment of the present invention provides a compressor, including the motor according to any of the above embodiments. According to the compressor of the embodiment of the present invention, by improving the structure of the balance weight and the installation position between the balance weight and the rotor core, while using a magnetic conductive material with a lower cost, the magnetic leakage phenomenon between the rotor core and the balance weight can be effectively avoided.
[0015] For better understanding and implementation, the present invention will be described in detail below with reference to the drawings. Description of the Drawings
[0016] Figure 1Schematic diagram of the rotor structure according to an embodiment of the present utility model;
[0017] Figure 2 Schematic diagram of the rotor structure according to an embodiment of the present utility model;
[0018] Figure 3 Schematic diagram of the rotor structure according to an embodiment of the present utility model;
[0019] Figure 4 Schematic diagram of the rotor structure according to an embodiment of the present utility model;
[0020] Figure 5 Schematic diagram of the rotor structure according to an embodiment of the present utility model.
[0021] Explanation of reference numerals: 10, rotor core; 11, magnet slot; 12, end plate; 20, balance weight; 21, rivet through-hole. Detailed implementation manners
[0022] To further illustrate each embodiment, the present utility model provides drawings. These drawings are a part of the disclosure of the present utility model, mainly used to illustrate the embodiments, and can be combined with the relevant descriptions in the specification to explain the operation principle of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present utility model.
[0023] In the related art, in order to reduce the manufacturing cost of the balance weight, the balance weight is usually made of a material with magnetic conductivity characteristics. However, when the balance weight is abutted against the axial end face of the motor rotor, its axial projection covers the magnet on the motor rotor, resulting in magnetic leakage between the motor rotor and the balance weight. Therefore, in order to avoid magnetic leakage, the balance weight is changed to an expensive material with very low magnetic permeability or non-magnetic, such as stainless steel material, with high cost.
[0024] In view of this, the embodiments of the present utility model provide a rotor structure, a motor and a compressor. According to the rotor structure and the compressor of the embodiments of the present utility model, by improving the structure of the balance weight and the installation position between the balance weight and the rotor core, while using a magnetic material with lower cost, the magnetic leakage phenomenon between the rotor core and the balance weight can be effectively avoided.
[0025] Please refer to Figures 1 to 5; In the first aspect of the embodiment of the present utility model, a rotor structure is provided, which includes a rotor core 10 and a balance weight 20. A plurality of pairs of magnet slots 11 are provided on the rotor core 10 at circumferential intervals along the rotor core 10. The shape of each pair of magnet slots 11 is V-shaped, and the openings of each pair of magnet slots 11 open outwards in the radial direction; the balance weight 20 is fan-shaped, the balance weight 20 is arranged on the end surface of the rotor core 10, the balance weight 20 is located between the outside of one pair of magnet slots 11 and the outside of the rotor core 10, and the projection of the balance weight 20 in the axial direction does not cover the adjacent pair of magnet slots 11.
[0026] Thus, in the rotor structure according to the embodiment of the present utility model, by improving the structure of the balance weight 20 and its installation position relative to the rotor core 10, the two inner sides of the balance weight 20 are separated from the outer sides of one pair of magnet slots 11, and the projection of the balance weight 20 in the axial direction does not cover the adjacent pair of magnet slots 11; in this way, since the balance weight 20 and the magnet slots 11 are arranged at intervals, it can be avoided that the balance weight 20 covers the magnet, resulting in magnetic leakage between the rotor core 10 and the balance weight 20. Therefore, the balance weight 20 in the embodiment of the present utility model can be made of a magnetic conductive material with a relatively low cost, which can not only reduce the material cost but also avoid magnetic leakage.
[0027] In the embodiment of the present utility model, the outer side surface of the balance weight 20 is an arc surface, and both inner side surfaces of the balance weight 20 are flat surfaces.
[0028] In the embodiment of the present utility model, the rotor core 10 includes a plurality of rotor sheets stacked together, and the rotor sheets are made of a magnetic conductive material; the balance weight 20 includes a plurality of single sheets stacked together, and the single sheets are made of a magnetic conductive material. In other words, in the embodiment of the present utility model, the waste materials generated by the magnetic conductive material used to manufacture the rotor core 10 can also be used as the manufacturing materials for the balance weight 20, thereby greatly improving the material utilization rate and further reducing the manufacturing cost of the rotor structure.
[0029] It can be understood that compared with the prior art, in the embodiment of the present utility model, there is no need to add a magnetic isolation device or increase the thickness of the high-end plate 12 to reduce magnetic leakage. By improving the shape and installation position of the balance weight 20 in the embodiment of the present utility model, the waste materials generated by the magnetic conductive material used to manufacture the rotor core 10 can be used to produce the balance weight 20, which can reduce the manufacturing cost without increasing the magnetic leakage of the rotor structure.
[0030] In some embodiments of the present utility model, a rivet through hole 21 is axially penetrated through the balance weight 20; in this way, the balance weight 20 is fixed on the rotor core 10 by a rivet passing through the rivet through hole 21.
[0031] In some embodiments of the present utility model, an end plate 12 is provided on the end face of the rotor core 10, and the end plate 12 covers a plurality of pairs of magnet slots 11. A notch is provided on the outer periphery of the end plate 12 and abuts against the two inner side faces of the balance weight 20, so as to limit the freedom degree of the balance weight 20 in the circumferential direction, better fix the balance weight 20, and prevent the balance weight 20 from rotating during the operation of the rotor, thereby damaging the electrical performance of the motor.
[0032] The following refers to Figures 1 to 5 Describe in detail the rotor structure according to a specific embodiment of the present utility model. It should be understood that the following description is only an exemplary illustration and cannot be construed as a limitation of the present utility model.
[0033] The rotor structure of this embodiment includes a rotor core 10 and a balance weight 20. A plurality of pairs of magnet slots 11 are provided on the rotor core 10 at intervals along the circumferential direction of the rotor core 10. The shape of each pair of magnet slots 11 is V-shaped, and the openings of each pair of magnet slots 11 open outwards in the radial direction; the balance weight 20 is fan-shaped, the balance weight 20 is arranged on the end face of the rotor core 10, the balance weight 20 is located between the outside of one pair of magnet slots 11 and the outside of the rotor core 10, and the projection of the balance weight 20 in the axial direction does not cover the adjacent pair of magnet slots 11.
[0034] Among them, in this embodiment, the rotor core 10 includes a plurality of stacked rotor sheets, and the rotor sheets are made of a magnetic conductive material; the balance weight 20 includes a plurality of stacked single sheets, and the single sheets are made of a magnetic conductive material. Secondly, in this embodiment, a rivet through hole 21 is axially formed through the balance weight 20; in this way, the balance weight 20 is fixed to the rotor core 10 by a rivet passing through the rivet through hole 21. Furthermore, in this embodiment, an end plate 12 is provided on the end face of the rotor core 10, the end plate 12 covers a plurality of pairs of magnet slots 11, and a notch is provided on the outer periphery of the end plate 12 and abuts against the two inner side faces of the balance weight 20.
[0035] The second aspect of the embodiment of the present utility model provides a motor, including the rotor structure described in any of the above embodiments. According to the motor of the embodiment of the present utility model, by improving the structure of the balance weight 20 and the installation position between the balance weight 20 and the rotor core 10, while using a magnetic conductive material with a lower cost, the magnetic leakage phenomenon between the rotor core 10 and the balance weight 20 can be effectively avoided.
[0036] The third aspect of the embodiment of the present utility model provides a compressor, including the motor described in any of the above embodiments. According to the compressor of the embodiment of the present utility model, by improving the structure of the balance weight 20 and the installation position between the balance weight 20 and the rotor core 10, while using a magnetic conductive material with a lower cost, the magnetic leakage phenomenon between the rotor core 10 and the balance weight 20 can be effectively avoided.
[0037] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.
[0038] The above-described embodiments only represent several implementation manners of the present utility model, and the description thereof is relatively specific and detailed, but should not be construed as a limitation to the scope of the rotor structure, motor and compressor of the utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model.
Claims
1. A rotor structure, characterized in that: The invention comprises a rotor core and a balancing block. The rotor core is provided with a plurality of pairs of magnet grooves spaced apart along the circumference of the rotor core, each pair of magnet grooves is V-shaped, and the opening of each pair of magnet grooves opens outward in the radial direction. The balancing block is fan-shaped and is arranged on the end face of the rotor core. The balancing block is located between the outer side of one pair of magnet grooves and the outer side of the rotor core, and the projection of the balancing block in the axial direction does not cover the pair of magnet grooves adjacent to it.
2. The rotor structure according to claim 1, characterized in that: The outer side surface of the balancing block is an arc surface, and the two inner side surfaces of the balancing block are both planes.
3. The rotor structure according to claim 1, characterized in that: The balancing block comprises a plurality of stacked single sheets, each of which is made of a magnetic conductive material.
4. The rotor structure according to claim 1, characterized in that: The rotor core includes a plurality of rotor sheets stacked together, and the rotor sheets are made of magnetic conductive material.
5. The rotor structure according to claim 1, characterized in that: The balancing block is provided with a rivet through hole along the axial direction.
6. The rotor structure according to claim 5, characterized in that: The balancing weight passes through the rivet through hole through a rivet and is fixed on the rotor core.
7. The rotor structure according to claim 1, characterized in that: The end surface of the rotor core is provided with an end plate, the end plate covers a plurality of pairs of magnet slots, and the outer periphery of the end plate is provided with notches abutting against the two inner side surfaces of the balancing block.
8. A motor, characterized in that: Comprising a rotor structure as claimed in any one of claims 1 to 7.
9. A compressor, characterized in that: Comprising the motor as claimed in claim 8.