Heat dissipation structure of motor

Abstract

The utility model belongs to the technical field of motors, and particularly discloses a heat dissipation structure of a motor, which comprises a front end cover, a shell, a stator, a rotor, a rotating shaft, a rear end cover and a turbofan assembly, the turbofan assembly is connected with the shell, the shell comprises an upper-layer shell and a lower-layer shell which are arranged with a gap, the gap is communicated with an air inlet of the turbofan assembly to form a heat dissipation channel, and the heat dissipation channel is provided with an air outlet exposed out of the front end cover. According to the motor heat dissipation structure, heat generated when the motor stator and the rotor work is effectively dissipated through the motor shell, and the service life of the motor is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, and specifically relates to a heat dissipation structure for an electric motor. Background Technology

[0002] An electric motor is a device that converts electrical energy into mechanical energy. It typically consists of a rotor, bearings, a stator, and a housing that houses them. To prevent damage to the rotor or stator from external impacts during operation, and to effectively prevent impurities, liquids, or other harmful substances from entering the motor and ensuring its normal operation, a front cover and a rear cover are installed at both ends of the housing to seal the motor.

[0003] Because the motor housing, front cover, and rear cover are sealed assembly, a small portion of the energy is always lost and converted into heat during the motor's energy conversion process. Even with a fan installed on the outside of the motor housing, the fan air cannot directly reach the stator and rotor inside the housing. Therefore, the heat dissipated by the stator and rotor inside the housing can only be dissipated through the surface of the motor casing. However, the heat dissipation area of ​​the motor casing is limited, resulting in ineffective heat dissipation and causing the entire motor to overheat.

[0004] If the heat generated during motor operation cannot be dissipated in time, it will not only affect the electromagnetic conversion efficiency of the winding coil itself, but also cause damage to related motor components and shorten the service life of the motor. Utility Model Content

[0005] The purpose of this invention is to provide a heat dissipation structure for an electric motor, which effectively dissipates the heat generated by the stator and rotor during operation through the motor casing, thereby improving the service life of the motor.

[0006] The purpose of this utility model is achieved through the following technical solution: a heat dissipation structure for an electric motor, comprising: a front end cover, a housing, a stator and a rotor installed in the housing, a rotating shaft passing through the housing, a rear end cover, and a turbine fan assembly arranged in sequence; the turbine fan assembly is connected to the housing, the housing includes an upper housing and a lower housing with a gap, the gap being connected to the air inlet of the turbine fan assembly to form a heat dissipation channel, and the heat dissipation channel having an air outlet exposed on the front end cover.

[0007] Preferably, heat dissipation bosses are provided circumferentially along the outer side wall of the lower shell, penetrating its axial direction, and the adjacent heat dissipation bosses form branch heat dissipation channels.

[0008] Preferably, the height of the heat dissipation boss is less than the spacing of the gap.

[0009] Preferably, the thickness of the lower shell is less than the thickness of the upper shell.

[0010] Preferably, the turbine fan assembly includes a turbine fan, a guide shroud, and a guide plate. The turbine fan is mounted on a rotating shaft and between the rear end cover and the guide shroud. The guide shroud is connected to the housing, and the guide plate is mounted on the outside of the guide shroud.

[0011] Preferably, the center of the air guide shroud is provided with an air inlet hole that cooperates with the turbine fan, the end face of the air guide plate near the air guide shroud is provided with a first air guide protrusion that cooperates with the air inlet hole, and the end face of the air guide plate near the air guide shroud is provided with second air guide protrusions at intervals along the circumferential direction. The second air guide protrusions are located between the edge of the air guide plate and the first air guide protrusions and extend towards the center of the air guide plate.

[0012] Preferably, it also includes a cover mounted on the turbine assembly.

[0013] Due to the adoption of the above technical solution, this utility model has the following advantages:

[0014] In this invention, the motor's heat dissipation structure comprises an upper and a lower housing with a gap between them to allow heat flow. Heat is dissipated simultaneously through the outer and inner walls of the upper and lower housings, increasing the heat dissipation area and thus rapidly cooling the stator and rotor inside the motor housing. Furthermore, a turbine fan assembly draws in outside air through the inlet, and the air flows through the gap, expelling the heated air from the gap through the outlet. This creates a smooth airflow channel from the inlet to the outlet, further improving the heat dissipation effect of the housing and extending the motor's service life. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0016] Figure 1 This is a schematic diagram of a heat dissipation structure for an electric motor according to the present invention;

[0017] Figure 2 This is an exploded view of the motor's heat dissipation structure.

[0018] Figure 3 This is a schematic diagram of the assembled motor;

[0019] Figure 4 This is a schematic diagram of the air guide plate;

[0020] Figure 5 This is a schematic diagram of the casing;

[0021] Figure 6 This is a schematic diagram of the first air guide cavity.

[0022] Figure label:

[0023] 1-Front end cap,

[0024] 2-Shell, 21-Connecting rib, 22-Upper shell, 23-Lower shell, 231-Heat dissipation boss, 232-Branch heat dissipation channel, 24-Gap, 25-Air outlet, 26-Air inlet

[0025] 3-Rear end cover, 4-Stator, 5-Rotor, 6-Shaft

[0026] 7-Turbine fan assembly, 71-Air inlet, 72-Turbine fan, 73-Air guide shroud, 731-Air inlet hole, 74-Air guide plate, 741-First air guide boss, 742-Second air guide boss, 743-Second air guide cavity, 75-First air guide cavity, 8-Cap. Detailed Implementation

[0027] Please see Figure 1 , Figure 2 , Figure 3 and Figure 5 The motor housing consists of a front cover 1, a housing 2, a stator 4 and a rotor 5 installed within the housing 2, a shaft 6 penetrating the housing 2, a rear cover 3, and a turbine fan assembly 7, arranged sequentially. The turbine fan assembly 7 is connected to the housing 2. The housing 2 includes an upper housing 22 and a lower housing 23 with a gap 24. The gap 24 communicates with the air inlet 71 of the turbine fan assembly 7, forming a heat dissipation channel. The heat dissipation channel has an air outlet 25 exposed on the front cover 1. Specifically, the rotor 5 is housed within the stator 4. The front cover 1, housing 2, and rear cover 3 are connected to form the motor housing to seal the rotor 5 and the stator 4, while also ensuring that the motor housing can conduct heat. A gap 24 is provided between the outer side wall of the lower housing 23 and the inner side wall of the upper housing 22 for heat dissipation. The gap 24 has an air outlet 25 and an air inlet 26. After the motor housing is assembled, the front cover 1 does not cover the air outlet 25, and the rear cover 3 does not cover the air inlet 26.

[0028] In this invention, the heat dissipation structure of the motor allows the heat generated during operation to be transferred to the housing 2. The housing 2 dissipates heat simultaneously through the outer and inner walls of the upper housing 22 and the outer wall of the lower housing 23, replacing the conventional housing which relies solely on the outer wall for heat dissipation. This increases the heat dissipation area, thereby rapidly cooling the stator 4 and rotor 5 inside the motor housing. Secondly, the turbine fan assembly 7 draws in external air through the air inlet 71 and discharges the air perpendicular to its axial direction in a circumferential manner. This air then flows into the gap 24, expelling the hot air from the gap 24 outside the motor, further improving the heat dissipation effect of the housing 2 and extending the motor's service life.

[0029] Please see Figure 5Furthermore, heat dissipation protrusions 231 are provided circumferentially along the outer side wall of the lower housing 23, penetrating its axial direction. Adjacent heat dissipation protrusions 231 form branch heat dissipation channels 232. With this structure, the heat dissipation protrusions 231 not only increase the heat dissipation area of ​​the housing 2, but also form branch heat dissipation channels 232 between the heat dissipation protrusions 231, reducing the airflow resistance in the gap 24, reducing turbulence between gases, guiding the gas flow generated by the turbine fan assembly 7, and allowing the hot airflow to pass through the gap 24 quickly and smoothly, accelerating the heat dissipation of the motor. The heat dissipation protrusions 231 also enhance the strength of the lower housing 23, preventing the lower housing 23 from deforming due to the impact of airflow.

[0030] Please see Figure 5 Furthermore, the height of the heat dissipation protrusion 231 is less than the distance of the gap 24 between the upper shell 22 and the lower shell 23. With this structure, a heat dissipation channel is formed above each branch heat dissipation channel 232, which can effectively prevent a branch heat dissipation channel 232 from being accidentally blocked and affecting its heat dissipation, and further allow the airflow carrying heat to pass through the gap 24 quickly and smoothly.

[0031] Please see Figure 5 Furthermore, the thickness of the lower housing 23 is less than the thickness of the upper housing 22. Using a thinner lower housing 23 prevents heat from accumulating within it and affecting the normal operation of the motor. Using a thicker upper housing 22 increases the strength of the housing 2 and prevents deformation under external forces. A connecting rib 21 is provided between the upper housing 22 and the lower housing 23, with mounting holes on the connecting rib 21. This not only facilitates the assembly of the housing 2 with the front cover 1 and the rear cover 3, but also increases the strength of the upper housing 22, making it less prone to deformation under external forces.

[0032] Please see Figure 1 , Figure 2 and Figure 6 Furthermore, the turbine fan assembly 7 includes a turbine fan 72, an air guide shroud 73, and an air guide plate 74. The turbine fan 72 is mounted on the rotating shaft 6 and positioned between the rear end cover 3 and the air guide shroud 73. The air guide shroud 73 is connected to the housing 2, and the air guide plate 74 is mounted on the outside of the air guide shroud 73. Specifically, the outer diameter of the air guide shroud 73 is equal to the outer diameter of the housing 2. The turbine fan 72 is installed within the air guide shroud 73. After the air guide shroud 73 is connected to the housing 2, the gas discharged by the turbine fan 72 will not leak from the connection interface between the air guide shroud 73 and the housing 2. The outer diameter of the rear end cover 3 is smaller than the inner diameter of the air guide shroud 73, so the rear end cover 3 is located within the air guide shroud 73. The circumferential outer wall of the rear end cover 3 and the inner wall of the air guide shroud 73 form a first air guide cavity 75. The gas discharged by the turbine fan 72 flows towards the gap 24 under the guidance of the first air guide cavity 75, thereby accelerating the gas flow in the gap 24. The heated gas flows out of the motor, improving the heat dissipation effect of the housing 2. Extend the lifespan of the motor.

[0033] Please see Figure 1 , Figure 2 and Figure 4 Furthermore, the center of the air guide shroud 73 is provided with an air inlet 731 that cooperates with the turbine fan 72, and the end face of the air guide plate 74 near the air guide shroud 73 is provided with a first air guide protrusion 741 that cooperates with the air inlet 731. The end face of the air guide plate 74 near the air guide shroud 73 is provided with second air guide protrusions 742 at intervals along the circumferential direction. The second air guide protrusions 742 are located between the edge of the air guide plate 74 and the first air guide protrusions 741, and extend in the direction of the center of the air guide plate 74. Specifically, the air guide plate 74 is installed on the outside of the air guide cover 73. Adjacent second air guide protrusions 742, the end face of the air guide plate 74, and the end face of the air guide cover 73 constitute a second air guide cavity 743. The second air guide cavity 743 is provided with an air inlet 71. Multiple second air guide protrusions 742 are provided, evenly spaced along the circumferential direction of the air guide plate 74. Therefore, an air inlet 71 is formed between adjacent second air guide protrusions 742, and the air inlets 71 are also evenly spaced along the circumferential direction of the air guide plate 74. Figure 1 External gas enters the second air guide cavity 743 through the air inlet 71, and is guided into the first air guide protrusion 741 in an orderly manner. After being diverted by the first air guide protrusion 741, the gas is drawn in by the turbine fan 72 through the air inlet 731 and then drawn into the second air guide cavity 743 in an orderly manner. The gas is then guided to the gap 24 through the first guide cavity to form a heat dissipation channel. The gas flow direction is as shown by the arrow.

[0034] Please see Figure 1 and Figure 3 In order to protect the air guide plate 74 from external forces and prevent the first air guide protrusion 741 and the second air guide protrusion 742 from deformation, a cover 8 is included, which is installed on the air guide plate 74.

[0035] In this invention, the heat dissipation structure of the motor allows the heat generated during motor operation to be transferred to the housing 2. The housing 2 dissipates heat simultaneously through the outer and inner walls of the upper housing 22, the outer wall of the lower housing 23, and the heat dissipation protrusion 231, increasing the heat dissipation area and rapidly cooling the stator 4 and rotor 5 inside the motor housing, thus improving the cooling effect. The heat dissipated from the inner wall of the upper housing 22, the outer wall of the lower housing 23, and the heat dissipation protrusion 231 is transferred to the gas in the gap 24. The turbine fan 72 assembly draws in external gas through the air inlet 71, and the gas is orderly drawn in through the second air guide cavity 743, then guided through the first guide cavity to the gap 24, forming a heat dissipation channel. This accelerates the flow of gas out of the motor from the gap 24, simultaneously carrying away heat and further improving the heat dissipation effect of the housing 2. This extends the service life of the motor.

[0036] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific implementation method of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, and improvements made within the scope of the spirit of this utility model should be included within the protection scope of this utility model.

Claims

1. A heat dissipation structure for an electric motor, characterized in that, include: The front cover (1), housing (2), stator (4) and rotor (5) installed in the housing (2), shaft (6) penetrating the housing (2), rear cover (3) and turbine fan assembly (7) are arranged in sequence; the turbine fan assembly (7) is connected to the housing (2), the housing (2) includes an upper housing (22) and a lower housing (23) with a gap (24), the gap (24) is connected to the air inlet (71) of the turbine fan assembly (7) to form a heat dissipation channel, and the heat dissipation channel has an air outlet (25) exposed to the front cover (1).

2. The heat dissipation structure of the motor according to claim 1, characterized in that, Heat dissipation bosses (231) are provided circumferentially along the outer side wall of the lower shell (23) and penetrate its axial direction. Adjacent heat dissipation bosses (231) form branch heat dissipation channels (232).

3. The heat dissipation structure of the motor according to claim 2, characterized in that, The height of the heat dissipation boss (231) is less than the spacing of the gap (24).

4. The heat dissipation structure of the motor according to claim 1, 2 or 3, characterized in that, The thickness of the lower shell (23) is less than the thickness of the upper shell (22).

5. The heat dissipation structure of the motor according to claim 1, 2 or 3, characterized in that, The turbine fan assembly (7) includes a turbine fan (72), a guide shroud (73) and a guide plate (74). The turbine fan (72) is mounted on the rotating shaft (6) and between the rear end cover (3) and the guide shroud (73). The guide shroud (73) is connected to the housing (2), and the guide plate (74) is mounted on the outside of the guide shroud (73).

6. The heat dissipation structure of the motor according to claim 5, characterized in that, The center of the air guide shroud (73) is provided with an air inlet (731) that cooperates with the turbine fan (72). The end face of the air guide plate (74) near the air guide shroud (73) is provided with a first air guide protrusion (741) that cooperates with the air inlet (731). The end face of the air guide plate (74) near the air guide shroud (73) is provided with a second air guide protrusion (742) at intervals along the circumferential direction. The second air guide protrusion (742) is located between the edge of the air guide plate (74) and the first air guide protrusion (741) and extends towards the center of the air guide plate (74).

7. The heat dissipation structure of the motor according to claim 1, 2, 3 or 6, characterized in that, It also includes a cover (8) installed on the turbine assembly (7).

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