Air-cooled permanent magnet motor using heat pipe to enhance heat dissipation

Abstract

The invention discloses an air-cooled permanent magnet motor using a heat pipe to enhance heat dissipation, and relates to the technical field of permanent magnet motors, the air-cooled permanent magnet motor comprises a motor outer shell, and a noise reduction heat dissipation assembly is arranged on the outer side of the right end of the motor outer shell. The problems that air cooling heat dissipation mainly utilizes a fan system to cool a casing, an end cover and other external parts, heat in a motor base cannot be directly and rapidly transferred to the environment, internal temperature accumulation is easily caused, limitation of insulating paint, insulating paper, air and other low-heat-conductivity materials in the motor exists, and key heating parts in the motor are not prone to heat dissipation are solved. In the prior art, heat generated by an end winding and a middle iron core cannot be quickly transmitted to a cooling shell, so that a large amount of heat is accumulated in key parts of the motor, a local high-temperature area is formed, and adverse consequences of magnetic steel excitation loss, insulation aging and the like are caused, and meanwhile, a fan is adopted for cooling, so that a large amount of noise is generated in a long-time use state, and the service life of the motor is prolonged. And the quietness of the use environment is influenced.

Description

Technical Field

[0001] The present invention relates to the technical field of permanent magnet motors, and particularly to an air-cooled permanent magnet motor using heat pipes to enhance heat dissipation. Background Art

[0002] A permanent magnet motor is a motor that uses permanent magnet materials as the rotor magnetic field source and is widely used in electric vehicles, household appliances, industrial automation, etc. When a permanent magnet motor is in use, heat dissipation treatment is required. Among them, the heat dissipation system of an air-cooled permanent magnet motor usually designs fins on the surface of the casing to increase the heat transfer area and improve the heat dissipation efficiency. It has the advantages of simple manufacturing process, low cost, and high reliability, and has been widely used in the field of heat dissipation of low-power density motors. The air-cooled heat dissipation system can be divided into natural air cooling and forced air cooling according to whether an additional device for enhancing air flow is used. Natural air cooling does not require an additional power device and only conducts heat exchange through the natural convection of the casing and the surrounding air. Forced air cooling usually uses a fan system to strengthen the heat exchange between the motor and the external air, and the additional fan system improves the heat dissipation efficiency of the motor.

[0003] Compared with the existing permanent magnet motors, the following defects still exist: Air-cooled heat dissipation mainly uses a fan system to cool external components such as the casing and end covers, and cannot directly transfer the heat inside the machine base to the environment quickly, which is likely to cause internal temperature accumulation. Limited by low-thermal-conductivity materials such as the insulating paint, insulating paper, and air inside the motor, the heat generated by the key heat-generating components inside the motor, especially at the positions of the end windings and the middle iron core, often cannot be quickly transferred to the cooling casing, resulting in a large amount of heat accumulation in the key components of the motor, forming a local high-temperature area, causing adverse consequences such as demagnetization of the magnetic steel and insulation aging. At the same time, when using a fan for cooling, a large amount of noise will be generated during long-term use, affecting the quietness of the use environment. Summary of the Invention

[0004] The purpose of the present invention is to provide an air-cooled permanent magnet motor using heat pipes to enhance heat dissipation, and solve the following technical problems: Air-cooled heat dissipation mainly uses a fan system to cool external components such as the casing and end covers, and cannot directly transfer the heat inside the machine base to the environment quickly, which is likely to cause internal temperature accumulation. Limited by low-thermal-conductivity materials such as the insulating paint, insulating paper, and air inside the motor, the heat generated by the key heat-generating components inside the motor, especially at the positions of the end windings and the middle iron core, often cannot be quickly transferred to the cooling casing, resulting in a large amount of heat accumulation in the key components of the motor, forming a local high-temperature area, causing adverse consequences such as demagnetization of the magnetic steel and insulation aging. At the same time, when using a fan for cooling, a large amount of noise will be generated during long-term use, affecting the quietness of the use environment.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] An air-cooled permanent magnet motor using heat pipes to enhance heat dissipation, comprising: a motor housing, a noise reduction and heat dissipation component is arranged on the outer side of the right end of the motor housing, a stator core is arranged on the inner side of the motor housing, a rotor body is arranged on the inner side of the stator core, a fan is arranged on the outer side of the right end of the rotor body and is located on the right side inside the motor housing, and a rotating shaft is arranged on the left end of the rotor body.

[0007] As a further solution of the present invention: a end cover support is fixedly installed at the left end of the motor housing, reserved through holes are equidistantly arranged on the inner side of the end cover support, and an obliquely arranged diagonal reinforcement bar for fixedly supporting the motor housing is installed at the right end edge of the end cover support.

[0008] As a further solution of the present invention: a silicone rubber partition board is arranged on the inner surface of the noise reduction and heat dissipation component, honeycomb sound insulation cotton is uniformly arranged on the inner side of the silicone rubber partition board, a graphene heat conduction board is arranged on the inner surface of the silicone rubber partition board, a ceramic fiber board is arranged on the inner surface of the graphene heat conduction board, and silicone damping is arranged on the inner surface of the ceramic fiber board;

[0009] Limit installation grooves are opened on the inner sides of the upper and lower ends of the silicone rubber partition board, limit connecting pieces are arranged on the inner sides of the limit installation grooves, and adjusting bolts are arranged on the inner sides of the limit connecting pieces.

[0010] As a further solution of the present invention: the noise reduction and heat dissipation component is integrally semicircularly arranged, the noise reduction and heat dissipation component is connected to the limit connecting piece by a clamping method through the limit installation groove, and both the noise reduction and heat dissipation component and the limit connecting piece are connected to the adjusting bolt by a threaded method.

[0011] As a further solution of the present invention: a plurality of stator heat pipe components are uniformly installed on the inner edge of the stator core, a heat pipe condensation ring is arranged at the right end of the stator heat pipe component, and a coil body fixedly connected to the stator core is arranged on the left side of the heat pipe condensation ring.

[0012] As a further solution of the present invention: a stator heat pipe evaporation section located inside the coil body is arranged at the left end of the stator heat pipe component, and a stator heat pipe adiabatic section located inside the stator core is arranged in the middle of the stator heat pipe component;

[0013] The stator heat pipe component is vertically fixedly connected to the heat pipe condensation ring, and the heat pipe condensation ring is at the tail end of the fan and connects a plurality of stator heat pipe components.

[0014] As a further solution of the present invention: the coil body is arranged in a "U" shape in the longitudinal section at the left end of the stator core to wrap the stator heat pipe evaporation section to increase heat dissipation.

[0015] As a further solution of the present invention: the rotor body and the fan are fixed by bolts, the fan is located on the inner right side of the motor housing, and heat dissipation hole grooves are provided at both the left and right ends of the motor housing.

[0016] As a further solution of the present invention: a rotor heat pipe component is arranged inside the rotor body, and the left end of the rotating shaft arranged at the left end of the rotor body penetrates through the middle of the end cover support and extends to the left end.

[0017] As a further solution of the present invention: the left end of the rotor heat pipe component is provided with a rotor heat pipe evaporation section inside the coil body, and the right end of the rotor heat pipe component penetrates through the middle of the rotor body and the motor housing in sequence and extends outside the motor housing.

[0018] Advantages of the present invention:

[0019] 1. By installing heat pipes in the stator and rotor, the internal heat is quickly transferred to the casing and the end cover, and then the air-cooling system is used to transfer the heat to the environment. By constructing an additional heat path between the key heat-generating components of the motor and the cooling housing, the heat dissipation problem of the high-heat-generating components inside the motor can be solved.

[0020] 2. By connecting the noise reduction and heat dissipation components arranged symmetrically in a snap-fit manner with the limit connecting pieces and using the adjusting bolts for threaded connection, the noise reduction and heat dissipation components can be stably installed on the outer right side of the motor housing as a whole, which can not only increase the heat dissipation effect but also facilitate noise reduction treatment. Description of the drawings

[0021] The present invention will be further described below with reference to the drawings.

[0022] Figure 1 is the overall sectional structure schematic diagram of the present invention;

[0023] Figure 2 is the overall structure schematic diagram of the connection between the rotor body and the rotor heat pipe component of the present invention;

[0024] Figure 3 is the overall structure schematic diagram of the connection between the stator core and the coil body of the present invention;

[0025] Figure 4 is the overall structure schematic diagram of the connection between the heat pipe condensation ring and the stator heat pipe component of the present invention;

[0026] Figure 5 is the front sectional structure schematic diagram of the connection between the stator core and the stator heat pipe component of the present invention;

[0027] Figure 6 is the overall structure schematic diagram of the connection between the rotor body and the fan of the present invention;

[0028] Figure 7 is a schematic cross-sectional view of the overall structure of the connection between the stator core and the rotor body of the present invention;

[0029] Figure 8 is a schematic view of the overall structure of the noise reduction and heat dissipation component of the present invention connected to the limit installation groove;

[0030] Figure 9 is a schematic view of the overall structure of the silicone rubber partition plate and the honeycomb sound insulation cotton of the present invention connected.

[0031] In the figure: 1. Motor housing; 2. End cover support; 3. Noise reduction and heat dissipation component; 301. Silicone rubber partition plate; 3011. Limit installation groove; 3012. Limit connecting piece; 3013. Adjusting bolt; 302. Honeycomb sound insulation cotton; 303. Graphene heat conduction plate; 304. Ceramic fiber board; 305. Silicone damping; 4. Stator core; 401. Heat pipe condensation ring; 402. Stator heat pipe component; 4021. Stator heat pipe adiabatic section; 4022. Stator heat pipe evaporation section; 403. Coil body; 5. Rotor body; 501. Rotor heat pipe component; 5011. Rotor heat pipe condensation section; 5012. Rotor heat pipe evaporation section; 6. Fan; 7. Rotating shaft. Detailed implementation mode

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0033] Please refer to Figures 1-9 As shown, the present invention is an air-cooled permanent magnet motor that enhances heat dissipation using heat pipes.

[0034] Embodiment 1

[0035] Please refer to Figures 1-5 In it, the present invention provides a technical solution: a motor housing 1, a noise reduction and heat dissipation component 3 is arranged on the outer side of the right end of the motor housing 1, a stator core 4 is arranged on the inner side of the motor housing 1, a rotor body 5 is arranged on the inner side of the stator core 4, a fan 6 located on the right side inside the motor housing 1 is arranged on the outer side of the right end of the rotor body 5, and a rotating shaft 7 is arranged on the left end of the rotor body 5;

[0036] At the inner edge of the stator core 4, a plurality of stator heat pipes 402 are uniformly installed. At the right end of the stator heat pipe 402, there is a heat pipe condensation ring 401. On the left side of the heat pipe condensation ring 401, there is a coil body 403 fixedly connected to the stator core 4. At the left end of the stator heat pipe 402, there is a stator heat pipe evaporation section 4022 located inside the coil body 403. In the middle of the stator heat pipe 402, there is a stator heat pipe adiabatic section 4021 located inside the stator core 4. The stator heat pipe 402 is perpendicularly and fixedly connected to the heat pipe condensation ring 401. The heat pipe condensation ring 401 is at the tail end of the fan 6 and connects the plurality of stator heat pipes 402. The coil body 403 is arranged in a "U" shape in the longitudinal section at the left end of the stator core 4 to wrap the stator heat pipe evaporation section 4022 to increase heat dissipation.

[0037] Specifically, long strip-shaped tubular stator heat pipes 402 are used and evenly distributed in the stator core 4. The number of stator heat pipes 402 can be determined according to the heat generation of the motor and space limitations. The stator heat pipe evaporation section 4022 is placed at the end of the coil body 403 with the largest heat generation, which can directly absorb the heat generated by the coil body 403. The middle part of the stator heat pipe 402 is the stator heat pipe adiabatic section 4021 to prevent heat from dissipating into the stator core 4 during the conduction process. The heat pipe condensation ring 401 is placed at the tail end of the motor and close to the fan 6 to facilitate heat dissipation, enabling the high thermal conductivity of the stator heat pipe 402 to quickly conduct the heat at the end of the coil body 403 to the tail end. The evenly distributed stator heat pipes 402 cover the main heat generation areas of the stator core 4, making the heat dissipation effect more comprehensive.

[0038] The stator heat pipe 402 can be made of materials with high thermal conductivity, such as copper or aluminum alloy, etc., to improve the thermal conductivity efficiency. During the installation process, it is necessary to ensure the fixation of the stator heat pipe 402 to avoid displacement caused by vibration or thermal expansion to maximize the heat dissipation effect. The heat pipe condensation ring 401 is perpendicularly and fixedly connected to the plurality of stator heat pipes 402, enhancing the overall heat dissipation ability, preventing heat accumulation at the tail end, dispersing the heat, and improving the heat dissipation efficiency. The stator heat pipe 402 and the heat pipe condensation ring 401 can be connected by welding to improve the stability.

[0039] Embodiment 2

[0040] Please refer to Figure 1 、 Figure 2 、 Figure 6 and Figure 7In this invention, a technical solution is provided: the rotor body 5 and the fan 6 are fixed by bolts. The fan 6 is located on the right side inside the motor housing 1, and heat dissipation hole grooves are provided at both the left and right ends of the motor housing 1. A rotor heat pipe member 501 is arranged inside the rotor body 5. The left end of the rotating shaft 7 arranged at the left end of the rotor body 5 extends leftward through the middle of the end cover support member 2. The left end of the rotor heat pipe member 501 is provided with a rotor heat pipe evaporation section 5012 located inside the coil body 403. The right end of the rotor heat pipe member 501 sequentially penetrates through the middle of the rotor body 5 and the motor housing 1 and extends outside the motor housing 1.

[0041] Specifically, in combination with Embodiment 1, the combined use of the rotor heat pipe member 501 and the stator heat pipe member 402 can respectively conduct the heat of the stator core 4 and the rotor body 5, avoiding the accumulation of heat inside the motor housing 1. Among them, the stator heat pipe member 402 dissipates heat through forced convection of the fan 6, and the rotor heat pipe member 501 dissipates heat through natural cooling. The combination of the two realizes the comprehensive heat dissipation of the motor.

[0042] The rotor heat pipe member 501 can also be made of copper or aluminum alloy. An integral long strip-shaped tubular rotor heat pipe member 501 is installed at the central position of the rotor body 5. The length and diameter dimensions of the rotor heat pipe member 501 can be determined according to the size and heat generation of the rotor body 5. The rotor heat pipe condensation section 5011 of the rotor heat pipe member 501 is placed close to the coil body 403 to directly absorb the heat generated by the rotor body 5. The rotor heat pipe evaporation section 5012 of the rotor heat pipe member 501 extends outside the motor housing 1, and natural cooling can be utilized by the temperature difference of the external air, which is energy-saving and environmentally friendly. The setting of the rotor heat pipe evaporation section 5012 not only improves the heat dissipation efficiency but also reduces the system complexity and usage cost.

[0043] Embodiment 3

[0044] Please refer to Figure 1 、 Figure 8 and Figure 9In this, the present invention provides a technical solution: A end - cover support member 2 is fixedly installed at the left end of the motor outer casing 1. Reserved perforations are equidistantly arranged inside the end - cover support member 2. An obliquely - arranged diagonal reinforcement strip for fixedly supporting the motor outer casing 1 is installed at the right - hand edge of the end - cover support member 2. On the inner surface of the noise - reduction and heat - dissipation assembly 3, a silicone rubber partition plate 301 is provided. Honeycomb - shaped sound - insulating cotton 302 is evenly arranged inside the silicone rubber partition plate 301. A graphene heat - conducting plate 303 is provided on the inner surface of the silicone rubber partition plate 301. A ceramic fiber board 304 is provided on the inner surface of the graphene heat - conducting plate 303. A silicone damping 305 is provided on the inner surface of the ceramic fiber board 304. Limiting installation grooves 3011 are opened on both the upper and lower inner sides of the silicone rubber partition plate 301. Limiting connectors 3012 are provided inside the limiting installation grooves 3011. Adjusting bolts 3013 are provided inside the limiting connectors 3012. The noise - reduction and heat - dissipation assembly 3 is integrally semicircular. The noise - reduction and heat - dissipation assembly 3 is connected by a snap - fit method between the limiting installation grooves 3011 and the limiting connectors 3012. Both the noise - reduction and heat - dissipation assembly 3 and the limiting connectors 3012 are connected to the adjusting bolts 3013 by a threaded method.

[0045] Specifically, before use, the noise - reduction and heat - dissipation assembly 3, which is symmetrically arranged and has a semicircular longitudinal section, is wrapped and fitted on the outer side of the right end of the motor outer casing 1, so that the silicone damping 305 is in contact with the outer surface of the motor outer casing 1. At this time, after the limiting connectors 3012 are butted and snap - fitted with the noise - reduction and heat - dissipation assembly 3 through the limiting installation grooves 3011, the adjusting bolts 3013 are passed through the limiting connectors 3012 and the noise - reduction and heat - dissipation assembly 3 for threaded connection, which can stably install the whole noise - reduction and heat - dissipation assembly 3 on the outer side of the right end of the motor outer casing 1, avoiding shaking or displacement. The honeycomb - shaped sound - insulating cotton 302 is evenly arranged inside the silicone rubber partition plate 301, and the silicone rubber partition plate 301, the graphene heat - conducting plate 303, the ceramic fiber board 304 and the silicone damping 305 are adhesively connected to each other. When heat is dissipated outward and transmitted to the surface of the motor outer casing 1, the noise - reduction and heat - dissipation assembly 3 can evenly distribute and dissipate the heat, and under the cooperation of the silicone rubber partition plate 301 and the honeycomb - shaped sound - insulating cotton 302, the noise generated by the fan 6 is absorbed and noise - reduced.

[0046] The heat conduction path is: the end of the coil body 403 - the evaporation section of the stator heat pipe 4022 - the adiabatic section of the stator heat pipe 4021 - the heat - pipe condensation ring 401 - the fan 6 - the motor outer casing 1 - the noise - reduction and heat - dissipation assembly 3, making the heat conduction path clear and the heat - dissipation efficiency high. The combination of the fan 6 and the noise - reduction and heat - dissipation assembly 3 achieves the effect of low noise and high heat - dissipation.

[0047] The above has described in detail an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered as defining the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. An air-cooled permanent magnet motor using heat pipes to enhance heat dissipation, characterized in that, It includes a motor housing (1), a noise reduction and heat dissipation component (3) is arranged on the outer side of the right end of the motor housing (1), a stator core (4) is arranged on the inner side of the motor housing (1), a rotor body (5) is arranged on the inner side of the stator core (4), a fan (6) located on the right side inside the motor housing (1) is arranged on the outer side of the right end of the rotor body (5), and a rotating shaft (7) is arranged on the left end of the rotor body (5).

2. The air-cooled permanent magnet motor using a heat pipe to enhance heat dissipation according to claim 1, wherein A end cover support (2) is fixedly installed on the left end of the motor housing (1). Reserved perforations are equidistantly arranged on the inner side of the end cover support (2). An obliquely arranged diagonal reinforcement bar for fixedly supporting the motor housing (1) is installed at the right end edge of the end cover support (2).

3. The air-cooled permanent magnet motor using a heat pipe to enhance heat dissipation according to claim 1, characterized in that, A silicone rubber partition plate (301) is arranged on the inner surface of the noise reduction and heat dissipation component (3). Honeycomb sound insulation cotton (302) is evenly arranged on the inner side of the silicone rubber partition plate (301). A graphene heat conduction plate (303) is arranged on the inner surface of the silicone rubber partition plate (301). A ceramic fiber board (304) is arranged on the inner surface of the graphene heat conduction plate (303). A silicone damping (305) is arranged on the inner surface of the ceramic fiber board (304); Limit installation grooves (3011) are opened on the inner sides of the upper and lower ends of the silicone rubber partition plate (301). Limit connecting pieces (3012) are arranged on the inner sides of the limit installation grooves (3011). Adjusting bolts (3013) are arranged on the inner sides of the limit connecting pieces (3012).

4. The air-cooled permanent magnet motor using a heat pipe to enhance heat dissipation according to claim 3, wherein The noise reduction and heat dissipation component (3) is integrally semicircular. The noise reduction and heat dissipation component (3) is connected to the limit connecting piece (3012) in a clamping manner through the limit installation groove (3011). Both the noise reduction and heat dissipation component (3) and the limit connecting piece (3012) are connected to the adjusting bolt (3013) in a threaded manner.

5. The air-cooled permanent magnet motor using heat pipes to enhance heat dissipation according to claim 1, wherein A plurality of stator heat pipes (402) are evenly installed at the inner edge of the stator core (4). A heat pipe condensation ring (401) is arranged at the right end of the stator heat pipe (402). A coil body (403) fixedly connected to the stator core (4) is arranged on the left side of the heat pipe condensation ring (401).

6. The air-cooled permanent magnet motor using heat pipes to enhance heat dissipation according to claim 5, wherein A stator heat pipe evaporation section (4022) located inside the coil body (403) is arranged at the left end of the stator heat pipe (402). A stator heat pipe adiabatic section (4021) located inside the stator core (4) is arranged in the middle of the stator heat pipe (402); The stator heat pipe (402) is vertically and fixedly connected to the heat pipe condensation ring (401). The heat pipe condensation ring (401) is at the tail end of the fan (6) and connects a plurality of stator heat pipes (402).

7. The air-cooled permanent magnet motor using heat pipes to enhance heat dissipation according to claim 5, characterized in that, The coil body (403) is arranged in a "U" shape in the longitudinal section at the left end of the stator core (4) to wrap the stator heat pipe evaporation section (4022) to increase heat dissipation.

8. The air-cooled permanent magnet motor using a heat pipe to enhance heat dissipation according to claim 1, characterized in that, The rotor body (5) is fixed to the fan (6) by bolts. The fan (6) is located on the inner right side of the motor housing (1). Heat dissipation holes are provided at both the left and right ends of the motor housing (1).

9. The air-cooled permanent magnet motor using a heat pipe to enhance heat dissipation according to claim 8, characterized in that A rotor heat pipe member (501) is provided inside the rotor body (5). The left end of the rotating shaft (7) provided at the left end of the rotor body (5) extends leftward through the middle of the end cover support member (2).

10. A forced-air permanent magnet motor using heat pipes to enhance heat dissipation according to claim 9, wherein A rotor heat pipe evaporation section (5012) located inside the coil body (403) is provided at the left end of the rotor heat pipe member (501). The right end of the rotor heat pipe member (501) sequentially passes through the middle of the rotor body (5) and the motor housing (1) and extends outside the motor housing (1).

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