Composite heat dissipation structure of permanent magnet motor

Abstract

The invention relates to the technical field of permanent magnet motors, in particular to a permanent magnet motor composite heat dissipation structure which comprises a motor shell, a plurality of heat dissipation fins annularly arranged on the outer side wall of the motor shell, a front cover arranged at the center of the front end face of the motor shell, a sealing clamping cover arranged at the center of the front end face of the front cover, and a rear cover arranged at the center of the rear end face of the motor shell. Bearings are arranged at the center inside the sealing clamping cover and the center inside the rear cover, a heat dissipation and purification structure is arranged at the center of the rear end face of the rear cover, and a cooling structure is arranged at the center of the inner side wall of the motor shell. The motor has the beneficial effects that the heat dissipation problem of the motor can be solved comprehensively and efficiently, the heat dissipation efficiency is improved effectively, heat generated by the motor can be dissipated more quickly, the temperature of the motor can be reduced more comprehensively and efficiently, stable operation of the motor in a proper temperature environment is ensured, the reliability and performance of the motor are improved, and the service life of the motor is prolonged. The service life is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of permanent magnet motors, and in particular to a composite heat dissipation structure of a permanent magnet motor. Background Art

[0002] As a high-efficiency and energy-saving drive device, permanent magnet motors are widely used in industries, transportation, new energy and other fields. However, with the continuous increase in power density, permanent magnet motors will generate a lot of heat during operation, especially copper loss, iron loss and mechanical loss in the stator and rotor parts. If this heat cannot be dissipated in a timely and effective manner, it will cause the internal temperature of the motor to rise, affecting the performance and life of the motor.

[0003] In the existing technology, permanent magnet motors use a single heat dissipation method, such as the common heat dissipation method that relies solely on natural convection of air or simple air cooling. The heat transfer coefficient of air is low, resulting in poor cooling effect, making it difficult to quickly and effectively dissipate the large amount of heat generated by the motor, causing the motor to operate in a high-temperature environment for a long time, affecting the motor performance and life. When a fan is used to force air flow to cool the motor, the friction loss caused by the cooling air is large, and a large motor noise is also generated. Permanent magnet materials are more sensitive to temperature. Excessive temperature may cause the permanent magnet materials to lose their magnetism, which in turn seriously affects the motor performance. It is impossible to maintain the permanent magnet materials in a suitable temperature range, which limits the application of permanent magnet motors in some high-load and long-term operation scenarios. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides a permanent magnet motor composite heat dissipation structure, which can comprehensively and efficiently solve the heat dissipation problem of the motor, effectively improve the heat dissipation efficiency, dissipate the heat generated by the motor more quickly, and reduce the motor temperature more comprehensively and efficiently, ensuring the stable operation of the motor in a suitable temperature environment, improving the reliability and performance of the motor, and extending its service life.

[0005] The following is the technical solution of the present invention, a permanent magnet motor composite heat dissipation structure, comprising: a motor housing, a plurality of heat dissipation fins arranged in a ring on the outer wall of the motor housing, a front cover provided at the center of the front end face of the motor housing, a sealing card cover provided at the center of the front end face of the front cover, a rear cover provided at the center of the rear end face of the motor housing, bearings provided at the inner center of the sealing card cover and the inner center of the rear cover, a heat dissipation purification structure provided at the center of the rear end face of the rear cover, a cooling structure provided at the center of the inner wall of the motor housing, three first bolts arranged in a ring on the front end face of the sealing card cover, three second bolts arranged in a ring on the front end face of the front cover, and three fifth bolts arranged in a ring on the rear end face of the rear cover.

[0006] As a preferred solution of the present invention, the heat dissipation and purification structure includes a protective shield, which is mounted on the rear end surface of the motor housing on the outer wall of the rear cover. A fan is provided at the center of the interior of the protective shield, and a purification frame is provided at the center of the rear end surface of the protective shield. The inner wall of the purification frame is slidably connected to a filter frame, and the inner wall of the filter frame is provided with three slots arranged in front and back.

[0007] As a preferred solution of the present invention, adsorption cotton is provided at the center of the front card slot, activated carbon is provided at the center of the center card slot, a filter is provided at the center of the rear card slot, and three limit blocks are arranged in a ring at the rear end face of the purification frame, and the three limit blocks are all connected to the rear end face of the filter frame.

[0008] As a preferred solution of the present invention, the cooling structure includes a cavity, which is arranged at the center of the inner wall of the motor housing, and a condensate flow pipe is wound around the center of the cavity.

[0009] As a preferred solution of the present invention, one end of the condensate flow pipe is a liquid inlet, and the other end of the condensate flow pipe is a liquid outlet. One end of the condensate flow pipe passes through an inner wall of the motor housing and reaches one side of the motor housing, and the other end of the condensate flow pipe passes through the lower inner wall of the motor housing and reaches the lower end of the motor housing.

[0010] As a preferred solution of the present invention, three fourth bolts are arranged in a circular pattern on the rear end face of the fan, and four third bolts are arranged in a circular pattern near the front of the outer side wall of the shield. One end portion of the four third bolts successively penetrates the outer side wall of the shield and the outer side wall of the rear cover to reach the interior of the rear cover, and the end portion is threadedly connected to the interior of the rear cover. One end portion of the three fourth bolts successively penetrates the rear end face of the fan and the rear end face of the rear cover to reach the interior of the rear cover, and the end portion is threadedly connected to the interior of the rear cover.

[0011] As a preferred solution of the present invention, one end portion of the three first bolts sequentially penetrates the front end face of the sealing card cover and the front end face of the front cover to reach the interior of the front cover, and the end portions are threadedly connected to the interior of the front cover, one end portion of the three fourth bolts sequentially penetrates the front end face of the front cover and the front end face of the motor housing to reach the interior of the motor housing, and the end portions are threadedly connected to the interior of the motor housing, and the three fifth bolts sequentially penetrate the rear end face of the rear cover and the rear end face of the motor housing to reach the interior of the motor housing, and the end portions are threadedly connected to the interior of the motor housing.

[0012] As a preferred solution of the present invention, the inner wall of the motor housing is provided with a stator, the inner wall of the stator is provided with a rotor, the outer wall of the motor housing is provided with four permanent magnets arranged in a ring shape, and the inner wall of the rotor is provided with a rotating shaft.

[0013] As a preferred solution of the present invention, the inner wall of the purification rack is provided with three slide grooves in an annular arrangement, and the outer wall of the filter rack is provided with three sliders in an annular arrangement, and the three sliders are slidably connected in the three slide grooves respectively.

[0014] As a preferred solution of the present invention, one end of the rotating shaft passes through the front end face of the front cover and the front end face of the sealing card cover in sequence to reach the front end of the sealing card cover, and the other end of the rotating shaft passes through the rear end face of the rear cover to reach the rear end of the rear cover, and the rotating shaft is rotatably connected inside the two bearings.

[0015] The beneficial effects of the present invention are:

[0016] 1. The present invention uses three methods: natural heat dissipation by the heat dissipation fins, active air circulation heat dissipation by the heat dissipation purification structure, and liquid cooling circulation heat dissipation by the cooling structure. This can comprehensively and efficiently solve the heat dissipation problem of the motor, effectively improve the heat dissipation efficiency, dissipate the heat generated by the motor more quickly, and reduce the motor temperature more comprehensively and efficiently, ensuring that the motor can operate stably in an appropriate temperature environment, improving the reliability and performance of the motor, and extending its service life.

[0017] 2. In the present invention, the heat of the motor can be discharged while the air is purified by using adsorption cotton, activated carbon, filter screen, etc., which effectively avoids the accumulation of impurities such as dust and harmful gases around the motor, ensures the lasting and stable heat dissipation effect, reduces the problems of component wear and short circuit caused by impurities entering the motor, improves the running stability and safety of the motor, and reduces the erosion of these impurities on the internal parts of the motor, thereby extending the service life of the motor.

[0018] 3. In the present invention, by providing a cavity and winding a condensate flow tube in the cavity, the condensate can be brought closer to the heat source of the motor, greatly improving the heat exchange efficiency and absorbing the heat generated by the motor more timely and effectively. At the same time, the liquid inlet and the liquid outlet ensure smooth circulation of the condensate, and the cooling function of the motor can be realized sustainably and stably. It can ensure that the condensate absorbs the heat of the motor evenly in a limited space, and there will be no local overheating. The cooling of the motor is more uniform and stable, and the various parts of the motor are maintained in a similar temperature environment, avoiding problems such as deformation of motor components due to excessive temperature differences. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention from another perspective;

[0021] Figure 3 It is a schematic diagram of the three-dimensional cross-sectional structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the three-dimensional split structure of the cooling structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the three-dimensional split structure of the heat dissipation and purification structure of the present invention;

[0024] Figure 6 Schematic diagram of the three-dimensional structure of the stator of the present invention;

[0025] Figure 7 Schematic diagram of the three-dimensional split structure of the permanent magnet of the present invention;

[0026] Figure 8 This is a schematic diagram of the three-dimensional split structure of the front cover of the present invention;

[0027] Figure 9 for Figure 3 A magnified schematic diagram of point A in the middle;

[0028] Figure 10 for Figure 5 A magnified schematic diagram of point B in the middle;

[0029] In the figure: 1. Motor housing; 2. Heat dissipation fins; 3. Front cover; 4. Sealing card cover; 5. Rear cover; 6. Bearing; 7. Rotating shaft; 8. Heat dissipation and purification structure; 801. Protective cover; 802. Fan; 803. Purification frame; 804. Slider; 805. Slide; 806. Card slot; 807. Adsorption cotton; 808. Activated carbon; 809. Filter; 810. Filter frame; 811. Limit block; 9. Cooling structure; 901. Cavity; 902. Condensate flow pipe; 10. Stator; 11. Rotor; 12. Permanent magnet; 13. First bolt; 14. Second bolt; 15. Third bolt; 16. Fourth bolt; 17. Fifth bolt. DETAILED DESCRIPTION

[0030] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present invention more clearly understood, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It is obvious that the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work shall fall within the scope of protection of the present invention.

[0031] Example

[0032] like Figures 1 to 10As shown, a composite heat dissipation structure of a permanent magnet motor comprises: a motor housing 1, wherein the outer wall of the motor housing 1 is provided with a plurality of heat dissipation fins 2 arranged in a ring shape, a front cover 3 is provided at the center of the front end face of the motor housing 1, a sealing card cover 4 is provided at the center of the front end face of the front cover 3, a rear cover 5 is provided at the center of the rear end face of the motor housing 1, a bearing 6 is provided at the inner center of the sealing card cover 4 and the inner center of the rear cover 5, a heat dissipation purification structure 8 is provided at the center of the rear end face of the rear cover 5, a cooling structure 9 is provided at the center of the inner wall of the motor housing 1, three first bolts 13 are arranged in a ring shape at the front end face of the sealing card cover 4, three second bolts 14 are arranged in a ring shape at the front end face of the front cover 3, and three fifth bolts 17 are arranged in a ring shape at the rear end face of the rear cover 5.

[0033] In this embodiment, one end of the three first bolts 13 sequentially penetrates the front end surface of the sealing card cover 4 and the front end surface of the front cover 3 to pass into the interior of the front cover 3, and the end portions are all threaded and rotatably connected to the interior of the front cover 3; one end of the three fourth bolts 16 sequentially penetrates the front end surface of the front cover 3 and the front end surface of the motor housing 1 to pass into the interior of the motor housing 1, and the end portions are all threaded and rotatably connected to the interior of the motor housing 1; the three fifth bolts 17 sequentially penetrate the rear end surface of the rear cover 5 and the rear end surface of the motor housing 1 to pass into the interior of the motor housing 1, and the end portions are all threaded and rotatably connected to the interior of the motor housing 1; the inner side wall of the motor housing 1 is sleeved with a stator 10, the inner side wall of the stator 10 is sleeved with a rotor 11, the outer side wall of the motor housing 1 is annularly arranged with four permanent magnets 12, the inner side wall of the rotor 11 is sleeved with a rotating shaft 7, one end portion of the rotating shaft 7 sequentially penetrates the front end surface of the front cover 3 and the front end surface of the sealing card cover 4 to pass to the front end of the sealing card cover 4, the other end portion of the rotating shaft 7 penetrates the rear end surface of the rear cover 5 to pass to the rear end of the rear cover 5, and the rotating shaft 7 is rotatably connected to the inside of the two bearings 6.

[0034] In this embodiment, the heat dissipation area of the outer wall of the motor housing 1 is increased by the heat dissipation fins 2, so that the heat inside the motor can be conducted to the heat dissipation fins 2 through the motor housing 1 more quickly, and then dissipated into the surrounding air. The heat dissipation and purification structure 8 can actively discharge the hot air inside the motor, realize air circulation to take away the heat while performing air purification, and the cooling structure 9 can take away the heat inside the motor directly through the condensate. The three heat dissipation methods work together to achieve a good heat dissipation effect of the motor, ensure the normal operation of the motor in a suitable temperature environment, and improve the reliability and performance of the motor. In addition, when alternating current is passed through the stator 10 coil, a rotating magnetic field is generated. The rotating magnetic field interacts with the permanent magnets 12 on the rotor 11 to generate a Lorentz force, causing the rotor 11 to rotate around the stator 10 under the support of the rotating shaft 7. When the rotor 11 rotates, the conductor cuts the magnetic lines of force, generates an induced electromotive force, and realizes the conversion of electrical energy into mechanical energy.

[0035] In this embodiment, the heat dissipation purification structure 8 includes a shield 801, which is sleeved on the rear end surface of the motor housing 1 on the outer wall of the rear cover 5. A fan 802 is provided at the center of the inner part of the shield 801, and a purification frame 803 is provided at the center of the rear end surface of the shield 801. The inner wall of the purification frame 803 is slidably connected to the filter frame 810. The inner wall of the filter frame 810 is provided with three card slots 806 arranged in front and back. An adsorption cotton 807 is provided at the center of the front card slot 806, an activated carbon 808 is provided at the center of the center card slot 806, and a filter screen 809 is provided at the center of the rear card slot 806. The rear end surface of the purification frame 803 is provided with three limit blocks 811 arranged in a ring, and the three limit blocks 811 are all connected to the filter frame 810. On the rear end face, the inner wall of the purification frame 803 is arranged in a ring shape with three slide grooves 805, the outer wall of the filter frame 810 is arranged in a ring shape with three sliders 804, and the three sliders 804 are respectively slidably connected to the inside of the three slide grooves 805, and the rear end face of the fan 802 is arranged in a ring shape with three fourth bolts 16, and the outer side wall of the protective cover 801 is arranged in a ring shape near the front, and one end of the four third bolts 15 passes through the outer side wall of the protective cover 801 and the outer side wall of the rear cover 5 in sequence to reach the interior of the rear cover 5, and the ends are all threadedly connected to the interior of the rear cover 5, and one end of the three fourth bolts 16 passes through the rear end face of the fan 802 and the rear end face of the rear cover 5 in sequence to reach the interior of the rear cover 5, and the ends are all threadedly connected to the interior of the rear cover 5.

[0036] In this embodiment, by powering on the fan 802, the hot air containing heat, dust and other impurities generated when the motor is working is drawn backwards, and the hot air first passes through the adsorption cotton 807, which will adsorb part of the water vapor and large particles of impurities in the air, and then passes through the activated carbon 808, which can adsorb harmful gases in the air, and then passes through the filter 809 to further filter the remaining tiny particles of impurities. The filtered and purified air is discharged from the rear end of the protective cover 801, thereby purifying the air around the motor and assisting the heat dissipation of the motor.

[0037] In this embodiment, the cooling structure 9 includes a cavity 901, which is arranged at the center of the inner wall of the motor housing 1. A condensate flow pipe 902 is wound around the center of the cavity 901. One end of the condensate flow pipe 902 is a liquid inlet, and the other end of the condensate flow pipe 902 is a liquid discharge port. One end of the condensate flow pipe 902 passes through an inner wall of the motor housing 1 and is passed to one side of the motor housing 1. The other end of the condensate flow pipe 902 passes through the lower inner wall of the motor housing 1 and is passed to the lower end of the motor housing 1. The external condensate is discharged through the cooling The liquid inlet of the condensate flow pipe 902 flows into the condensate flow pipe 902, and the condensate circulates in the cavity 901. Since the motor housing 1 will generate heat when the motor is working, the heat of the motor housing 1 is conducted to the cavity 901. Through heat transfer, the heat is transferred from the motor housing 1 to the condensate in the condensate flow pipe 902. The low temperature of the condensate is used to take away the heat, thereby absorbing the heat inside the motor. Then, the condensate flows out through the discharge port of the condensate flow pipe 902 with the absorbed heat, thereby achieving the purpose of cooling the motor.

[0038] Implementation plan: When alternating current is passed through the coil of the stator 10, a rotating magnetic field is generated. Through the action of the permanent magnet 12 on the rotor 11, according to the law of electromagnetic induction and the Lorentz force law, the rotating magnetic field interacts with the permanent magnet 12. The permanent magnet 12 drives the rotor 11 to rotate around the stator 10 supported by the rotating shaft 7. When the rotor 11 rotates, its conductor cuts the magnetic lines of force, generating an induced electromotive force, thereby realizing the conversion of electrical energy into mechanical energy.

[0039] The heat generated when the motor is working is conducted to the heat dissipation fins 2 through the motor housing 1. The heat dissipation area of the outer wall of the motor housing 1 is increased by the heat dissipation fins 2, and the heat can be dissipated to the surrounding air more quickly. When the fan 802 is powered on, suction is generated to draw the hot air with heat, dust and other impurities inside the motor backward. The hot air first enters the purification frame 803, and passes through the components inside different slots 806 on the filter frame 810 in turn. The adsorption cotton 807 at the front can absorb part of the water vapor and large particles of impurities in the air, and the activated carbon 808 at the center can absorb harmful gases in the air. At the same time, the remaining tiny particles of impurities are further filtered out by the filter mesh 809 at the back, and the purified air is discharged from the rear end of the protective cover 801, thereby purifying the air in the working environment of the motor and avoiding the accumulation of impurities affecting the performance of the motor. In addition, air circulation is achieved by discharging hot air and introducing cold air to assist in motor heat dissipation.

[0040] External condensate flows in from the liquid inlet of the condensate flow pipe 902 and circulates in the condensate flow pipe 902 in the cavity 901 in the center of the inner wall of the motor housing 1. When the motor is working, the motor housing 1 will heat up, and the heat is conducted to the cavity 901. Through heat transfer, the heat is transferred from the high-temperature motor housing 1 to the low-temperature condensate. The condensate absorbs the heat dissipated by the motor, and then the condensate with heat flows out through the drain port, thereby absorbing and taking away the heat inside the motor, reducing the temperature inside the motor, and allowing the heat generated inside the permanent magnet motor to be dissipated in a timely and effective manner, ensuring that the motor operates in a stable and suitable temperature environment, improving the reliability and stability of the motor operation, and extending the service life of the motor.

[0041] Although preferred embodiments of the present invention have been described, further changes and modifications may be made to these embodiments by those skilled in the art once the basic inventive concepts are understood. It is apparent that various changes and modifications may be made to the present invention by those skilled in the art without departing from the spirit and scope of the present invention. Thus, the present invention is intended to encompass such changes and modifications as fall within the scope of equivalents of the present invention.

Claims

1. A composite heat dissipation structure for a permanent magnet motor, characterized in that: include: The motor housing, the outer wall of the motor housing is provided with multiple heat dissipation fins arranged in a ring, a front cover is provided at the center of the front end face of the motor housing, a sealing card cover is provided at the center of the front end face of the front cover, a rear cover is provided at the center of the rear end face of the motor housing, bearings are provided at the inner center of the sealing card cover and the inner center of the rear cover, a heat dissipation purification structure is provided at the center of the rear end face of the rear cover, a cooling structure is provided at the center of the inner wall of the motor housing, three first bolts are arranged in a ring at the front end face of the sealing card cover, three second bolts are arranged in a ring at the front end face of the front cover, and three fifth bolts are arranged in a ring at the rear end face of the rear cover.

2. A permanent magnet motor composite heat dissipation structure according to claim 1, characterized in that: The heat dissipation and purification structure includes a protective cover, which is mounted on the rear end surface of the motor housing on the outer wall of the rear cover. A fan is provided at the center of the inner part of the protective cover, and a purification frame is provided at the center of the rear end surface of the protective cover. The inner wall of the purification frame is slidably connected to the filter frame, and the inner wall of the filter frame is provided with three slots arranged in front and back.

3. A permanent magnet motor composite heat dissipation structure according to claim 2, characterized in that: There is adsorption cotton at the center of the front slot, activated carbon at the center of the center slot, and a filter at the center of the rear slot. The rear end face of the purification frame is provided with three limit blocks arranged in a ring, and the three limit blocks are all connected to the rear end face of the filter frame.

4. A permanent magnet motor composite heat dissipation structure according to claim 1, characterized in that: The cooling structure comprises a cavity, which is arranged at the center of the inner wall of the motor housing, and a condensate flow pipe is wound around the center of the cavity.

5. A permanent magnet motor composite heat dissipation structure according to claim 4, characterized in that: One end of the condensate flow pipe is a liquid inlet, and the other end of the condensate flow pipe is a liquid outlet. One end of the condensate flow pipe passes through an inner wall of the motor housing and reaches one side of the motor housing, and the other end of the condensate flow pipe passes through the lower inner wall of the motor housing and reaches the lower end of the motor housing.

6. A permanent magnet motor composite heat dissipation structure according to claim 2, characterized in that: Three fourth bolts are arranged in a circular pattern on the rear end face of the fan, and four third bolts are arranged in a circular pattern near the front of the outer side wall of the guard shield. One end portion of the four third bolts passes through the outer side wall of the guard shield and the outer side wall of the rear cover in turn to reach the interior of the rear cover, and the end portion is threadedly connected to the interior of the rear cover. One end portion of the three fourth bolts passes through the rear end face of the fan and the rear end face of the rear cover in turn to reach the interior of the rear cover, and the end portion is threadedly connected to the interior of the rear cover.

7. A permanent magnet motor composite heat dissipation structure according to claim 6, characterized in that: One end portion of the three first bolts passes through the front end face of the sealing card cover and the front end face of the front cover in sequence to reach the interior of the front cover, and the end portions are threadedly connected to the interior of the front cover. One end portion of the three fourth bolts passes through the front end face of the front cover and the front end face of the motor housing in sequence to reach the interior of the motor housing, and the end portions are threadedly connected to the interior of the motor housing. The three fifth bolts pass through the rear end face of the rear cover and the rear end face of the motor housing in sequence to reach the interior of the motor housing, and the end portions are threadedly connected to the interior of the motor housing.

8. The composite heat dissipation structure of a permanent magnet motor according to claim 1, characterized in that: The inner wall of the motor housing is provided with a stator, the inner wall of the stator is provided with a rotor, the outer wall of the motor housing is provided with four permanent magnets arranged in a ring shape, and the inner wall of the rotor is provided with a rotating shaft.

9. The composite heat dissipation structure of a permanent magnet motor according to claim 2, characterized in that: The inner wall of the purification rack is provided with three slide grooves in a circular arrangement, and the outer wall of the filter rack is provided with three sliders in a circular arrangement. The three sliders are slidably connected to the inside of the three slide grooves respectively.

10. The composite heat dissipation structure of a permanent magnet motor according to claim 8, characterized in that: One end of the shaft passes through the front end surface of the front cover and the front end surface of the sealing card cover in sequence and reaches the front end of the sealing card cover. The other end of the shaft passes through the rear end surface of the rear cover and reaches the rear end of the rear cover. The shaft is rotatably connected inside the two bearings.

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