High-speed permanent magnet motor
By adopting a design that combines a retaining ring and a steel ring in a high-speed permanent magnet motor, and using expansion materials and sealing rings to fix the magnets, the problems of unstable magnet fixing and low heat conduction efficiency are solved, thereby improving the stability and performance of the motor.
Patent Information
- Application Number
- CN202520236428.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-14
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2035-02-14
AI Technical Summary
In high-speed permanent magnet motors, the magnets are not fixed stably, which can lead to them falling off or loosening, affecting the stability and safety of the motor. At the same time, the low heat transfer efficiency also affects the performance of the motor.
The design incorporates a first and second retaining ring combined with a steel ring. The steel ring has a fixing groove filled with expansion material to fix the magnet. Combined with a sealing ring and precise assembly process, this ensures the magnet is stable and improves heat conduction efficiency.
It effectively prevents magnets from falling off, improves rotor dynamic balance and motor stability, enhances heat conduction efficiency, reduces noise and temperature rise, and extends the life of permanent magnet materials.
Smart Images
Figure CN223583924U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of electromagnetic motor structure, and particularly relates to a high-speed permanent magnet motor. BACKGROUND
[0002] With the continuous progress of industrial technology and the increasing demand for energy efficiency, high-speed permanent magnet motors have been widely used in electric vehicles, wind power generation, high-speed machine tools, aerospace and other fields due to their high efficiency, high power density, low maintenance cost and other significant advantages. High-speed permanent magnet motors use permanent magnet materials to replace the traditional electric excitation system of the motor, effectively reducing energy loss and improving motor efficiency. However, the design and manufacture of high-speed permanent magnet motors also face a series of technical challenges.
[0003] In the structure of high-speed permanent magnet motor, the rotor is the core component of the motor, and its stability and reliability directly affect the overall performance of the motor. In the traditional rotor design, the magnetic steel is usually directly pasted or embedded in the rotor core. This method may cause the magnetic steel to fall off or loosen due to centrifugal force when rotating at high speed, thereby affecting the stability and safety of the motor. In addition, the fixing method between the magnetic steel and the rotor core directly relates to the stability of the magnetic circuit and the heat conduction efficiency, and has an important influence on the performance of the motor.
[0004] In order to solve the above problems, the industry has begun to explore more advanced rotor fixing technology and magnetic steel fixing method. Among them, a method of combining resistance ring and steel ring gradually attracts attention. This method sets a first resistance ring and a second resistance ring on the rotor, and sets a steel ring between the two resistance rings, and a fixing groove is formed in the steel ring for placing the magnetic steel, so as to effectively fix the magnetic steel. However, how to ensure the stable fixation of the magnetic steel while ensuring the dynamic balance and stability of the rotor when rotating at high speed, and how to improve the heat conduction efficiency of the magnetic circuit, are still key technical problems to be solved in the current design and manufacture of high-speed permanent magnet motors.
[0005] In summary, in view of the key technical problems of magnetic steel fixation, dynamic balance, heat conduction efficiency and heat dissipation in the design of high-speed permanent magnet motor rotor, a new type of high-speed permanent magnet motor rotor structure is developed to improve the overall performance and reliability of the motor, which has important practical significance and application value. Based on this background, the present application proposes a high-speed permanent magnet motor rotor design scheme using a specific resistance ring and steel ring structure, which aims to optimize the fixation method of the magnetic steel and improve the heat conduction efficiency to meet the demand of modern industry for high performance and high reliability of high-speed permanent magnet motor. CONTENT OF THE INVENTION
[0006] In order to solve the problems in the prior art, the present application provides a high-speed permanent magnet motor, comprising:
[0007] A rotor, a first stop ring and a second stop ring are sleeved on the rotor;
[0008] A steel ring is arranged between the first stop ring and the second stop ring, a fixing groove is arranged in the steel ring, a magnetic steel is arranged in the fixing groove, and an expansion material is filled between the fixing groove and the magnetic steel.
[0009] Optionally, in some embodiments of the present application, the steel ring is sleeved on the rotor, and the steel ring and the rotor rotate relative to each other.
[0010] Optionally, in some embodiments of the present application, a plurality of fixing grooves are arranged in the steel ring.
[0011] Optionally, in some embodiments of the present application, a gap of 0.10mm-0.20mm is formed between the fixing groove and the magnetic steel.
[0012] Optionally, in some embodiments of the present application, a sealing ring is arranged at the opening of the fixing groove, and the sealing ring abuts against the steel ring and the first stop ring, and the steel ring and the second stop ring.
[0013] Optionally, in some embodiments of the present application, a first filling gap is formed between the first stop ring and the steel ring, and the first filling gap is communicated with the outside of the fixing groove and the first stop ring.
[0014] Optionally, in some embodiments of the present application, a second filling gap is formed between the second stop ring and the steel ring, and the second filling gap is communicated with the outside of the fixing groove and the second stop ring.
[0015] Optionally, in some embodiments of the present application, a first positioning part is arranged on the steel ring, a second positioning part is arranged on the first stop ring and the second stop ring at a position corresponding to the first positioning part, and when the steel ring, the first stop ring and the second stop ring are sleeved on the rotor, the first positioning part and the second positioning part are butted to fix the steel ring, the first stop ring and the second stop ring relative to each other.
[0016] Optionally, in some embodiments of the present application, the first positioning part is a positioning pin, and the second positioning part is a positioning groove, and when the steel ring, the first stop ring and the second stop ring are assembled, the positioning pin is located in the positioning groove.
[0017] Optionally, in some embodiments of the application, the steel ring is provided with a first fixing hole, the first resistance ring and the second resistance ring are provided with a second fixing hole, the first fixing hole is arranged corresponding to the second fixing hole, and the first fixing hole and the second fixing hole are fixedly connected through a fixing bolt, so that the steel ring and the first resistance ring and the second resistance ring are fixed to each other.
[0018] Compared with the prior art, the application has the beneficial effects that:
[0019] 1. The design of the combination of the first resistance ring, the second resistance ring and the steel ring effectively limits the centrifugal force of the magnetic steel during high-speed rotation, prevents the magnetic steel from falling off or loosening, and significantly improves the fixing stability of the magnetic steel; the expansion material filled between the fixing groove and the magnetic steel not only enhances the bonding force between the magnetic steel and the steel ring, but also further ensures the stability of the magnetic steel in the fixing groove through the micro-expansion characteristics of the material;
[0020] 2. By accurately calculating and designing the weight distribution of the resistance ring, the steel ring and the magnetic steel, and reasonably assembling the process, good dynamic balance of the rotor during high-speed rotation is realized, vibration and noise are reduced, and the running stability and reliability of the motor are improved;
[0021] 3. The sealing ring not only enhances the sealing property of the motor, but also plays a buffering role on the slight vibration of the rotor through its elastic property, further improving the stability of the motor;
[0022] 4. The steel ring as a heat conduction bridge between the magnetic steel and the rotor core effectively reduces the thermal resistance between the magnetic steel and the rotor core, improves the heat conduction efficiency, helps to timely conduct the heat generated in the motor, reduces the temperature rise, and prolongs the service life of the permanent magnet material. BRIEF DESCRIPTION OF DRAWINGS
[0023] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.
[0024] Figure 1 The overall structure schematic diagram of the high-speed permanent magnet motor provided by the embodiment of the application is shown in the figure.
[0025] Figure 2 The explosion structure schematic diagram of the high-speed permanent magnet motor provided by the embodiment of the application is shown in the figure.
[0026] Figure 3 The overall structure schematic diagram of the steel ring provided by the embodiment of the application is shown in the figure.
[0027] Figure 4 A cross-sectional view of the high-speed permanent magnet motor provided in an embodiment of this application;
[0028] Figure 5 for Figure 4 Enlarged structural diagram at point A in the middle.
[0029] Explanation of reference numerals in the attached figures:
[0030] 100, Rotor; 200, Steel ring; 210, Fixing groove; 211, Magnet; 212, Expansion material; 213, Sealing ring; 214, Gap; 215, Channel; 220, First positioning part; 230, First fixing hole; 300, First abutting ring; 310, First filling gap; 400, Second abutting ring; 410, Second filling gap; 500, Second positioning part; 600, Second fixing hole; 700, Fixing bolt. Detailed Implementation
[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this application. It is understood that the accompanying drawings are provided for reference and illustration only, and are not intended to limit this application. The connection relationships shown in the accompanying drawings are only for clear description and do not limit the connection method.
[0032] Specifically, such as Figure 1 As shown in the embodiment of this application, a high-speed permanent magnet motor is provided. The motor mainly includes a rotor 100 and a steel ring 200. A first stop ring 300 and a second stop ring 400 are sleeved on the rotor 100. The inner diameter of the first stop ring 300 and the second stop ring 400 are the same as the outer diameter of the corresponding position of the rotor 100, so that the first stop ring 300 and the second stop ring 400 can rotate relative to the rotor 100.
[0033] A steel ring 200 is provided between the first stop ring 300 and the second stop ring 400, such as Figure 1As shown, a steel ring 200 is fitted onto the rotor 100. The inner diameter of the steel ring 200 is the same as the inner diameter of the first abutment ring 300 and the second abutment ring 400, so that the steel ring 200 and the rotor 100 can rotate relative to each other. A fixing groove 210 is provided on the steel ring 200. In this embodiment of the application, multiple fixing grooves 210 are provided, and the fixing grooves 210 are arranged in a ring on the steel ring 200. The fixing grooves 210 penetrate through both sides of the steel ring 200, so that the openings at both ends of the fixing groove 210 abut against the first abutment ring 300 and the second abutment ring 400, respectively.
[0034] In this embodiment, four sets of fixing grooves 210 are provided, each set having three fixing grooves 210, and each set of fixing grooves 210 is evenly distributed on the steel ring 200.
[0035] A magnet 211 is provided in each fixing groove 210. The overall shape of the magnet 211 is the same as that of the fixing groove 210, but the size of the magnet 211 is smaller than that of the fixing groove 210, so that a gap 214 is formed between the magnet 211 and the fixing groove 210, and the gap 214 is filled with an expansion material 212.
[0036] In this embodiment, the expansion material 212 can be mixed with paint to produce an expansion effect. After expansion, the magnet 211 is squeezed to fix the magnet 211 and prevent the magnet 211 from shaking.
[0037] In this embodiment of the application, in order to allow paint to be placed into the gap 214, a gap 214 of 0.10mm-0.20mm is formed between the fixing groove 210 and the magnet 211.
[0038] In this application, preferably, the gap 214 can be filled with only the expansion material 212 to achieve the same effect.
[0039] At the same time, such as Figure 3 As shown, a sealing ring 213 is provided at the opening of the fixing groove 210. The shape of the sealing ring 213 is the same as the shape of the opening of the fixing groove 210. When the first abutment ring 300, the second abutment ring 400 and the steel ring 200 are assembled, the side of the first abutment ring 300 facing the steel ring 200 abuts against the sealing ring 213, and the side of the second abutment ring 400 facing the steel ring 200 abuts against the sealing ring 213, so that the sealing ring 213 can seal the fixing groove 210.
[0040] In the above, when paint needs to be added, the paint needs to enter the gap 214 through the slit. To achieve this function, as follows: Figure 5As shown, in this application, a first filling gap 310 and a second filling gap 410 are provided. The first filling gap 310 and the second filling gap 410 are symmetrically arranged with respect to the steel ring 200. The first filling gap 310 is located between the first abutment ring 300 and the steel ring 200, and the second filling gap 410 is located between the second abutment ring 400 and the steel ring 200.
[0041] Both the first filling gap 310 and the second filling gap 410 are connected to the fixing groove 210, and both the first filling gap 310 and the second filling gap 410 allow paint to pass through, making it convenient for paint to enter the fixing groove 210 through the first filling gap 310 or the second filling gap 410.
[0042] Since multiple fixing slots 210 are provided in this embodiment of the application, and the multiple fixing slots 210 are independently provided, a channel 215 is provided between adjacent fixing slots 210 in this embodiment of the application. The channel 215 connects adjacent fixing slots 210, so that paint can flow into other fixing slots 210 through the channel 215, so that each fixing slot 210 is filled with paint.
[0043] like Figures 2-3 As shown, this application also includes a first positioning part 220 and a second positioning part 500. The first positioning part 220 is disposed on the steel ring 200, and the second positioning part 500 is disposed on the first abutting ring 300 and the second abutting ring 400. The first positioning part 220 and the second positioning part 500 cooperate with each other to connect the first positioning part 220 and the second positioning part 500, so that the first abutting ring 300 and the second abutting ring 400 can be assembled and connected with the steel ring 200.
[0044] In the above, the first positioning part 220 is configured as a positioning pin, and the second positioning part 500 is configured as a positioning groove. The cross-sectional shape of the positioning groove is the same as the cross-sectional shape of the positioning pin, so that the positioning pin can stably cooperate with the positioning groove and avoid relative rotation between the steel ring 200 and the first stop ring 300 and the second stop ring 400.
[0045] In this embodiment of the application, the steel ring 200 is further provided with a first fixing hole 230, and the first abutting ring 300 and the second abutting ring 400 are provided with a second fixing hole 600. The first fixing hole 230 and the second fixing hole 600 are provided correspondingly, and the first fixing hole 230 and the second fixing hole 600 are fixedly connected by fixing bolts 700, so that the steel ring 200 is fixed to the first abutting ring 300 and the second abutting ring 400.
[0046] The above examples are only used to illustrate the technical method of the utility model and not to limit, although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the utility model can be modified or replaced equivalently without departing from the spirit and scope of the technical method of the utility model.
Claims
1. A high-speed permanent magnet motor, characterized in that, include: The rotor is fitted with a first stop ring and a second stop ring. A steel ring is disposed between the first stop ring and the second stop ring. A fixing groove is formed inside the steel ring, and a magnet is disposed in the fixing groove. An expansion material is filled between the fixing groove and the magnet.
2. The high-speed permanent magnet motor according to claim 1, characterized in that, The steel ring is fitted onto the rotor, and the steel ring and the rotor rotate relative to each other.
3. A high-speed permanent magnet motor according to claim 2, characterized in that, The fixing groove is provided in multiple ways, and the multiple fixing grooves are arranged in a ring on the steel ring.
4. A high-speed permanent magnet motor according to claim 3, characterized in that, A gap of 0.10mm-0.20mm is formed between the fixing groove and the magnet.
5. A high-speed permanent magnet motor according to claim 4, characterized in that, A sealing ring is provided at the opening of the fixing groove. The sealing ring abuts against the steel ring and the first abutting ring, and the sealing ring abuts against the steel ring and the second abutting ring.
6. A high-speed permanent magnet motor according to claim 1, characterized in that, A first filling gap is formed between the first abutment ring and the steel ring, and the first filling gap connects the fixing groove and the outside of the first abutment ring.
7. A high-speed permanent magnet motor according to claim 5, characterized in that, A second filling gap is formed between the second abutment ring and the steel ring, and the second filling gap connects the fixing groove and the outside of the second abutment ring.
8. A high-speed permanent magnet motor according to claim 1, characterized in that, The steel ring is provided with a first positioning part, and the first abutting ring and the second abutting ring are provided with a second positioning part corresponding to the position of the first positioning part. When the steel ring, the first abutting ring and the second abutting ring are sleeved on the rotor, the first positioning part and the second positioning part are connected, so that the steel ring is fixed to the first abutting ring and the second abutting ring.
9. A high-speed permanent magnet motor according to claim 8, characterized in that, The first positioning part is a positioning pin, and the second positioning part is a positioning groove. When the steel ring is assembled with the first abutment ring and the second abutment ring, the positioning pin is located in the positioning groove.
10. A high-speed permanent magnet motor according to claim 1, characterized in that, The steel ring is provided with a first fixing hole, and the first and second abutment rings are provided with second fixing holes. The first fixing hole and the second fixing hole are provided correspondingly. The first fixing hole and the second fixing hole are fixedly connected by fixing bolts, so that the steel ring is fixed to the first abutment ring and the second abutment ring.