Permanent magnet motor rotor with heat dissipation function

Abstract

The application relates to a permanent magnet motor rotor with a heat dissipation function, belonging to the technical field of permanent magnet motor rotors, which comprises a shell and a rotor, a plurality of ventilation grooves in annular array are arranged on the two sides of the shell, a fan is fixedly connected to one end of the rotating shaft, a plurality of heat dissipation grooves in annular array are arranged in the rotor, and a magnetic isolation strip is fixedly arranged at the end, away from the permanent magnet, of each pair of buckles. The application has the advantages that the plurality of ventilation grooves in annular array arranged on the two sides of the shell are matched with the fan at one end of the rotating shaft, air in the heat dissipation grooves in the rotor can be driven to flow by the fan when the rotor rotates, active heat dissipation is formed, the exchange of heat in the motor and the outside is accelerated, the heat dissipation efficiency is improved, the magnetic isolation strip at the end, away from the permanent magnet, of the buckle can effectively block the leakage of the magnetic field, the magnetic loss is reduced, and the operation efficiency of the motor is improved.

Description

Technical Field

[0001] This application relates to the field of permanent magnet motor rotor technology, and in particular to a permanent magnet motor rotor with heat dissipation function. Background Technology

[0002] Currently, permanent magnet motors often use externally arranged heat sinks for heat dissipation. The heat sinks increase the contact area between the permanent magnet motor casing and the outside air. The heat generated by the permanent magnet motor during operation is conducted through the casing to the surface of the heat sinks for heat dissipation, thus ensuring the overall operating temperature of the permanent magnet motor.

[0003] However, most existing permanent magnet motors do not have active cooling devices and rely on heat sinks on the outer casing for heat dissipation. The heat dissipation efficiency is greatly affected by the environment. When the surrounding air circulation is poor or the ambient temperature is high, the heat is difficult to dissipate quickly, which can easily lead to the accumulation of internal temperature of the motor and thus affect the service life of the motor rotor. Utility Model Content

[0004] The purpose of this application is to provide a permanent magnet motor rotor with heat dissipation function, which has the advantages of improving heat dissipation efficiency. It solves the problem that most existing permanent magnet motors do not have active heat dissipation devices and rely on heat sinks close to the outer shell for heat dissipation. The heat dissipation efficiency is greatly affected by the environment. When the surrounding air circulation is poor or the ambient temperature is high, heat is difficult to dissipate quickly, which can easily lead to the accumulation of internal temperature of the motor and thus affect the service life of the motor rotor.

[0005] The permanent magnet motor rotor with heat dissipation function provided in this application adopts the following technical solution: A permanent magnet motor rotor with heat dissipation function includes a shell and a rotor. Multiple ventilation slots arranged in a ring array are opened on both sides of the shell. A rotating shaft is fixedly connected inside the rotor. A fan is fixedly connected to one end of the rotating shaft. Multiple heat dissipation slots arranged in a ring array are opened through the rotor. Multiple slots arranged in a ring array are opened inside the rotor. Four buckles arranged in a rectangular array are opened inside each of the multiple slots. Permanent magnets are fixedly connected to each pair of the multiple buckles. Magnetic shielding strips are fixedly installed at the ends of the multiple buckles away from the permanent magnets. An output shaft is fixedly connected to the end of the rotating shaft away from the fan.

[0006] By adopting the above technical solution, multiple annular array ventilation slots on both sides of the outer casing cooperate with a fan at one end of the rotor shaft. When the rotor rotates, the fan drives air to flow in the heat dissipation slots inside the rotor, forming active heat dissipation, accelerating the exchange of heat between the motor and the outside, and improving heat dissipation efficiency. The multiple annular array heat dissipation slots inside the rotor increase the contact area between the rotor and the air, facilitating the rapid dissipation of heat generated during rotor operation and preventing heat accumulation from affecting the performance of the permanent magnet. The four rectangular array of buckles in the slot can firmly clamp the permanent magnet, preventing it from loosening or shifting when the rotor rotates at high speed, ensuring the stability of the permanent magnet position and the stability of the motor magnetic field. The magnetic shielding strip at the end of the buckle away from the permanent magnet can effectively block magnetic field leakage, reduce magnetic loss, and improve motor operating efficiency. The fixed connection between the rotor shaft and the output shaft ensures the stability of power transmission. The fan fixedly connected to the rotor shaft can drive the fan to rotate simultaneously when the motor rotor rotates, adding air flow inside the heat dissipation slots, thereby actively dissipating heat from the motor rotor.

[0007] Preferably, the inner wall of the outer casing has multiple mounting slots arranged in a ring array, a stator is fixedly connected inside the outer casing, and multiple winding mounting holes arranged in a ring array are opened through the inside of the stator. An mounting strip is fixedly connected to the outer wall of the stator.

[0008] By adopting the above technical solution, the annular array mounting groove on the inner wall of the outer casing and the mounting strip on the outer wall of the stator cooperate with each other to ensure that the stator is fixed in position during motor operation, reducing faults caused by stator displacement. The annular array setting of the winding mounting holes optimizes the internal space of the stator, makes the winding layout more reasonable, is conducive to the uniform distribution of electromagnetic field, and improves the electromagnetic conversion efficiency of the motor.

[0009] Preferably, the outer wall of the outer shell is fixedly connected with a plurality of heat dissipation fins arranged in a ring array.

[0010] By adopting the above technical solution, the heat dissipation fins arranged in a ring array increase the contact area between the outer shell and the outside air, so that the heat generated inside the motor can be more efficiently conducted to the surface of the outer shell and dissipated into the surrounding environment, thereby increasing the passive heat dissipation capacity of the motor. With the synergistic effect of the active cooling of the fan, a more effective heat dissipation channel can be formed to quickly remove heat and prevent the motor from experiencing performance degradation or component damage due to excessive temperature.

[0011] Preferably, all of the mounting strips are fixedly disposed inside the mounting groove.

[0012] By adopting the above technical solution, the cooperation between the mounting strip and the mounting groove plays a positioning role, ensuring that the stator is accurately installed in the housing, and increasing the contact area between the stator and the housing, so that the heat of the stator can be transferred to the housing more quickly, and the heat can be dissipated through the heat dissipation fins on the outer wall of the housing.

[0013] Preferably, the rotor is rotatably disposed inside the stator.

[0014] By adopting the above technical solution, a stable and uniform air gap is formed between the rotor and the stator, which provides a basis for efficient coupling of electromagnetic fields, reduces magnetic flux loss, and improves the electromagnetic conversion efficiency of the motor.

[0015] Preferably, a first dustproof net is fixedly connected to one side of the inside of the outer shell, and a second dustproof net is fixedly connected to the end of the inside of the outer shell away from the first dustproof net.

[0016] By adopting the above technical solution, the first dustproof net and the second dustproof net are fixedly connected to the two sides inside the shell, which can block dust and other impurities in the outside air from entering the motor, prevent them from adhering to the rotor and fan and other components, prevent the heat dissipation efficiency from decreasing due to the accumulation of impurities, and at the same time, it will not obstruct the airflow of the ventilation slot, ensuring the normal operation of the active heat dissipation device.

[0017] Preferably, the end of the rotating shaft away from the fan is disposed through one side of the housing.

[0018] By adopting the above technical solution, the shaft passes through the outer shell, ensuring the connection between the shaft and external equipment. The setting of passing through the outer shell allows the shaft to receive auxiliary support from the outer shell during rotation, enhancing the stability of the shaft during operation and reducing vibration caused by high-speed rotation.

[0019] Preferably, all of the magnetic strips are made of ceramic material.

[0020] By adopting the above technical solutions, ceramic materials themselves have excellent magnetic shielding properties, which can effectively block magnetic field leakage, reduce magnetic flux loss, improve the electromagnetic conversion efficiency of the motor, ensure that the magnetic field generated by the permanent magnet acts more in the working range, and enhance the power output of the motor. At the same time, ceramic materials are resistant to high temperature and have good chemical stability. They are not prone to performance degradation in the high-temperature environment generated by motor operation, and can maintain a stable magnetic shielding effect for a long time, thus extending the service life of the motor.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] This permanent magnet motor rotor with heat dissipation function increases airflow within the internal heat dissipation slots by installing a fan at one end of the shaft, thereby enhancing the rotor's heat dissipation effect. When the rotor rotates, it simultaneously drives the fan at one end of the shaft, creating airflow circulation in conjunction with ventilation slots on both sides of the outer casing. This allows air to flow through the internal heat dissipation slots, carrying away heat and accelerating heat dissipation. Simultaneously, the annular heat dissipation fins on the outer wall of the casing increase the contact area, enhancing passive heat dissipation. The combined active and passive heat dissipation prevents heat accumulation in the rotor and stator. Clamps inside the rotor slot securely hold the permanent magnets to prevent loosening. Ceramic magnetic shielding strips are placed at both ends of the slot to block magnetic field leakage. The stator is fixed to the outer casing mounting slot by mounting strips. Optimized winding mounting hole layout ensures a uniform electromagnetic field and guarantees electromagnetic conversion efficiency. The shaft penetrates the outer casing to enhance rotational stability. Dustproof nets at both ends block impurities without affecting the ventilation effect inside the casing. The fan driven by the shaft increases airflow inside the casing, and the ceramic magnetic shielding strips on both sides of the slot increase rotor heat dissipation while reducing magnetic losses, thus extending the lifespan of the motor rotor. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this application;

[0024] Figure 2 This is a schematic diagram of the rotor structure of this application;

[0025] Figure 3 This is a schematic diagram of the heat dissipation device structure of this application;

[0026] Figure 4 This is a schematic diagram of the stator mounting structure of this application.

[0027] Figure 5 This is a cross-sectional view of the overall structure of this application.

[0028] In the picture:

[0029] 1. Casing; 2. Ventilation slot; 3. Rotor; 4. Shaft; 5. Fan; 6. Heat dissipation slot; 7. Slot; 8. Snap-fit; 9. Permanent magnet; 10. Magnetic shielding strip; 11. Output shaft; 12. Mounting slot; 13. Stator; 14. Winding mounting hole; 15. Mounting strip; 16. Heat dissipation fins; 17. First dustproof net; 18. Second dustproof net. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1 -Appendix Figure 5 This application will be described in further detail below.

[0031] Example 1: A permanent magnet motor rotor with heat dissipation function, referring to... Figure 1 , Figure 2 and Figure 3 The device includes a housing 1 and a rotor 3. The housing 1 has multiple ventilation slots 2 arranged in a ring array on both sides. A rotating shaft 4 is fixedly connected inside the rotor 3, and a fan 5 is fixedly connected to one end of the shaft 4. The fan 5 allows air to circulate inside the rotor 3 during rotation, creating active cooling, accelerating the exchange of heat between the motor's interior and the outside environment, and improving heat dissipation efficiency. Multiple heat dissipation slots 6 arranged in a ring array are also formed inside the rotor 3. These slots increase the contact area between the rotor 3 and the air, facilitating rapid dissipation of heat generated during operation. Multiple slots 7 arranged in a ring array are also formed inside the rotor 3. Each slot 7 has four rectangular arrayed latches 8 inside. Each pair of latches 8 is fixedly connected to a permanent magnet 9. The four rectangular array latches 8 in the slot 7 can firmly hold the permanent magnet 9, preventing it from loosening or shifting when the rotor 3 rotates at high speed, ensuring the stability of the permanent magnet 9 and the stability of the motor magnetic field. Each pair of latches 8 has a magnetic shielding strip 10 fixedly installed at the end away from the permanent magnet 9. The magnetic shielding strip 10 at the end of the latch 8 away from the permanent magnet 9 can effectively block magnetic field leakage, reduce magnetic loss, and improve the motor operating efficiency. The end of the rotating shaft 4 away from the fan 5 is fixedly connected to the output shaft 11. The fixed connection between the rotating shaft 4 and the output shaft 11 ensures the stability of power transmission.

[0032] Example 2: A permanent magnet motor rotor with heat dissipation function, referring to... Figure 2 , Figure 4 and Figure 5The inner wall of the outer casing 1 has multiple mounting slots 12 arranged in a ring array. A stator 13 is fixedly connected inside the outer casing 1. Multiple winding mounting holes 14 arranged in a ring array are drilled through the inside of each stator 13. Mounting strips 15 are fixedly connected to the outer wall of the stator 13. The ring array mounting slots 12 on the inner wall of the outer casing 1 and the mounting strips 15 on the outer wall of the stator 13 cooperate to ensure that the stator 13 remains in a fixed position during motor operation, reducing malfunctions caused by stator displacement. The ring array arrangement of the winding mounting holes 14 optimizes the internal space of the stator 13, making the winding layout more reasonable, which is conducive to the uniform distribution of the electromagnetic field and improves the electromagnetic conversion efficiency of the motor. Multiple heat dissipation fins 16 arranged in a ring array are fixedly connected to the outer wall of the outer casing 1. The heat dissipation fins 16 increase the contact area between the outer casing 1 and the outside air, allowing the heat generated inside the motor to be more efficiently conducted to the surface of the outer casing 1 and dissipated into the surrounding environment. This increases the motor's passive heat dissipation capacity. Combined with the active cooling effect of the fan 5, this creates a more effective heat dissipation channel, quickly removing heat and preventing performance degradation or component damage due to overheating. Multiple mounting strips 15 are fixedly installed inside the mounting slots 12. The cooperation between the mounting strips 15 and the mounting slots 12 serves a positioning function, ensuring the stator 13 is accurately positioned within the outer casing 1 and increasing the contact area between the stator 13 and the outer casing 1. This allows the heat from the stator 13 to be transferred to the outer casing 1 more quickly and dissipated through the heat dissipation fins 16 on the outer wall of the outer casing 1. The rotor 3 is rotated inside the stator 13, forming a stable and uniform air gap between the rotor 3 and the stator 13. This provides a basis for efficient coupling of the electromagnetic field, reduces magnetic flux loss, and improves the electromagnetic conversion efficiency of the motor. A first dustproof net 17 is fixedly connected to one side inside the outer casing 1, and a second dustproof net 18 is fixedly connected to the end of the outer casing 1 away from the first dustproof net 17. The first dustproof net 17 and the second dustproof net 18 are fixedly connected to both sides inside the outer casing 1, respectively. This can prevent dust and other impurities in the outside air from entering the motor and avoid them from adhering to components such as the rotor 3 and the fan 5, preventing a decrease in heat dissipation efficiency due to the accumulation of impurities. At the same time, it will not obstruct the airflow of the ventilation slot 2, ensuring the normal operation of the active cooling device. The shaft 4 is away from the fan 5. The shaft 4 is installed through one side of the outer casing 1, ensuring the connection between the shaft 4 and the external equipment. The installation through the outer casing 1 provides auxiliary support for the shaft 4 during rotation, enhancing its stability and reducing vibration caused by high-speed rotation. Multiple magnetic shielding strips 10 are made of ceramic material. Ceramic material itself has excellent magnetic shielding properties, effectively blocking magnetic field leakage, reducing magnetic flux loss, improving the electromagnetic conversion efficiency of the motor, ensuring that the magnetic field generated by the permanent magnet 9 acts more in the working range, and enhancing the motor's power output. At the same time, ceramic material is resistant to high temperature and has good chemical stability. It is not easy to experience performance degradation in the high-temperature environment generated by the motor operation, and can maintain a stable magnetic shielding effect for a long time, extending the service life of the motor.

[0033] The implementation principle of this application embodiment is as follows:

[0034] When the motor is working, the ventilation slots 2 arranged in annular arrays on both sides of the outer casing 1 and the fan 5 at one end of the shaft 4 form an active cooling device. When the rotor 3 rotates, it drives the fan 5 to rotate, driving air to enter the interior of the outer casing 1 from one ventilation slot 2. After passing through the heat dissipation slots 6 arranged in annular arrays inside the rotor 3, the heat is carried away and then discharged from the other ventilation slot 2, accelerating the exchange of heat between the motor and the outside. The heat dissipation fins 16 arranged in annular arrays on the outer wall of the outer casing 1 increase the contact area between the outer casing 1 and the outside air, enhancing the passive cooling capacity. Under the synergistic effect of active and passive cooling, heat is prevented from accumulating inside and affecting the performance of the permanent magnet 9. The slots 7 inside the rotor 3 securely clamp the permanent magnet 9 with rectangular array buckles 8 to prevent it from loosening or shifting during high-speed rotation, ensuring magnetic field stability. The end of the buckle 8 away from the permanent magnet 9 is made of ceramic material. The magnetic shielding strip 10 can block magnetic field leakage, reduce magnetic loss, and improve operating efficiency. The stator 13 is fixed in position by the mounting strip 15 on the outer wall and the mounting groove 12 on the inner wall of the outer casing 1. The annular array of winding mounting holes 14 optimizes the internal space, making the electromagnetic field distribution more uniform and improving the electromagnetic conversion efficiency. At the same time, the contact between the mounting strip 15 and the mounting groove 12 increases the heat conduction area between the stator 13 and the outer casing 1. The heat generated by the stator 13 is conducted to the heat dissipation fins 16 through the outer casing 1. The first dustproof net 17 and the second dustproof net 18 on both sides of the inner side of the outer casing 1 are used to block dust and impurities from entering the inner side of the outer casing 1, avoiding dust accumulation and thus affecting the heat dissipation efficiency. Through the synergistic effect of the active heat dissipation of the fan 5 and the passive heat dissipation of the heat dissipation fins 16, the stator 13 and rotor 3 of the motor are effectively cooled, extending the service life of the motor.

Claims

1. A permanent magnet motor rotor with heat dissipation function, comprising a housing (1) and a rotor (3), characterized in that: The outer casing (1) has multiple ventilation slots (2) arranged in a ring array on both sides. The rotor (3) is fixedly connected to a rotating shaft (4). One end of the rotating shaft (4) is fixedly connected to a fan (5). The rotor (3) has multiple heat dissipation slots (6) arranged in a ring array through it. The rotor (3) has multiple slots (7) arranged in a ring array inside it. Each slot (7) has four buckles (8) arranged in a rectangular array inside it. Each pair of buckles (8) is fixedly connected to a permanent magnet (9). Each pair of buckles (8) is fixedly connected to a magnetic shielding strip (10) at the end away from the permanent magnet (9). The end of the rotating shaft (4) away from the fan (5) is fixedly connected to an output shaft (11).

2. The permanent magnet motor rotor with heat dissipation function according to claim 1, characterized in that: The inner wall of the outer shell (1) is provided with a plurality of mounting slots (12) arranged in a ring array. A stator (13) is fixedly connected inside the outer shell (1). A plurality of winding mounting holes (14) arranged in a ring array are provided inside the stator (13). An mounting strip (15) is fixedly connected to the outer wall of the stator (13).

3. A permanent magnet motor rotor with heat dissipation function according to claim 1, characterized in that: The outer wall of the outer shell (1) is fixedly connected with a plurality of heat dissipation fins (16) arranged in a ring array.

4. A permanent magnet motor rotor with heat dissipation function according to claim 2, characterized in that: Multiple mounting strips (15) are fixedly installed inside the mounting groove (12).

5. A permanent magnet motor rotor with heat dissipation function according to claim 1, characterized in that: The rotor (3) is rotatably disposed inside the stator (13).

6. A permanent magnet motor rotor with heat dissipation function according to claim 1, characterized in that: A first dustproof net (17) is fixedly connected to one side of the inside of the outer shell (1), and a second dustproof net (18) is fixedly connected to the end of the inside of the outer shell (1) away from the first dustproof net (17).

7. A permanent magnet motor rotor with heat dissipation function according to claim 1, characterized in that: The end of the rotating shaft (4) away from the fan (5) is disposed through one side of the outer casing (1).

8. A permanent magnet motor rotor with heat dissipation function according to claim 1, characterized in that: All of the magnetic shielding strips (10) are made of ceramic material.

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