A diode compact high-speed motor heat dissipation structure

Abstract

The application relates to a compact high-speed motor heat dissipation structure, which comprises a base, a motor rotor and a motor stator, the motor rotor is rotatably arranged in the base, the motor stator is fixedly arranged in the base, the motor rotor is coaxially arranged in the axial center channel of the motor stator, the inner side wall of the motor stator is provided with a plurality of axial stator notches, there is an air gap between the motor stator and the motor rotor, the air gap and the stator notches form a first air duct, a plurality of axial ventilation notches are formed in the outer side wall of the motor stator, and the first air duct, the axial ventilation notches and the cavities located at the opposite ends of the motor stator in the base form an internal circulation air path. Through the above arrangement, the rotor yoke axial air hole in the traditional scheme is cancelled, the cancelled rotor shaft hole ventilation is replaced by air gap and stator notch cooperation ventilation, the axial ventilation notches are formed in the outer peripheral wall of the stator, the internal circulation air path is formed, and the internal circulation efficiency can be improved under reasonable selection of the groove type and air gap size.

Description

Technical Field

[0001] This invention belongs to the field of motor technology, specifically relating to a two-pole compact high-speed motor heat dissipation structure. Background Technology

[0002] Currently, in the domestic market, the industry standard for internal air circulation design of two-pole compact high-speed motors generally involves setting several air-guiding cavities in the frame and core, as well as axial ventilation holes in the rotor yoke, to achieve internal circulation through fan rotation. This traditional method has a relatively fixed internal air circulation cooling design. On the stator side, further improving its internal circulation cooling capacity is limited by the frame casting structure, and increasing the area of ​​the frame air-guiding cavities negatively impacts the contact heat dissipation area between the outer circle of the core and the inner wall of the frame. On the rotor side, the internal circulating cooling medium can only cool the rotor axial ventilation holes, which then conduct heat to cool the rotor bars, resulting in poor heat dissipation. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a two-pole compact high-speed motor heat dissipation structure, which solves the technical problems such as poor heat dissipation effect in the existing motor internal closed-loop circulation.

[0004] To solve the above problems, the technical solution of the present invention is: a two-pole compact high-speed motor heat dissipation structure, comprising:

[0005] Base,

[0006] The motor rotor is rotatably mounted inside the machine base;

[0007] The motor stator is fixedly installed inside the frame, and the motor rotor is coaxially located in the axial central channel of the motor stator. Several axial stator slots are opened on the inner side wall of the motor stator. There is an air gap between the motor stator and the motor rotor. The air gap and the stator slots form the first air duct. Several axially penetrating axial ventilation slots are opened on the outer side wall of the motor stator. The first air duct, the axial ventilation slots, and the cavities located at opposite ends of the motor stator inside the frame form an internal circulation air path.

[0008] Optionally, the yoke of the motor stator has several axial mounting holes, through which a connecting rod passes. Pressure heads are provided at both ends of the connecting rod to press the stator laminations of the motor stator. Optionally, the several axial mounting holes are evenly distributed axially on the yoke of the motor stator.

[0009] Optionally, the connecting rod is a screw rod, one of which is the end of the screw rod, and the other is a nut threaded onto the screw rod.

[0010] Optionally, an insulating seal is wound around the outer periphery of a coil that extends beyond one end of the motor stator and is adjacent to the motor rotor.

[0011] Optionally, a guide tube is fixedly installed on the side wall of the motor rotor shaft, and an insulating sealing ring is installed on the coil opposite to the shaft. The guide tube and the insulating sealing ring are adjacent to each other to form an air-sealed cavity. A fan is fixedly installed on the side wall of the shaft inside the machine base. The fan is located inside the machine base and has a second air duct. One end opening of the first air duct and one end opening of the second air duct are both located in the air-sealed cavity, and the other end opening of the second air duct is located outside the air-sealed cavity.

[0012] Optionally, four air guide chambers are provided on the base near its opposite ends, and the four air guide chambers are evenly distributed on the outer side wall of the base.

[0013] Optionally, the connecting rod is a screw rod, and both pressure heads are nuts threaded onto the screw rod.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. This invention provides a new internal airflow design concept. By setting ventilation zones on the outer diameter of the stator laminations and the outer diameter of the stator pressure ring, the internal circulation resistance on the back of the stator can be reduced. The heat at the air gap slot is circulated to the ventilation slots on the outer diameter of the stator and the heat dissipation of the frame to achieve heat convection, thereby improving the heat dissipation capacity, optimizing the heat dissipation capacity of the motor, and thus improving the power density of the motor and improving the material utilization rate.

[0016] 2. The present invention uses a long screw and nut to tighten the stator core, which provides better rigidity and greatly reduces the difficulty of stator core tightening production. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the heat dissipation structure in the embodiment;

[0018] Figure 2 This is a schematic diagram of the installation of the connecting rod in the embodiment;

[0019] Figure 3 This is a schematic diagram showing the positions of the motor rotor and motor stator in the embodiment;

[0020] Figure 4 This is a schematic diagram of the air gap and stator slot in the embodiment;

[0021] Figure 5 This is a schematic diagram of the air guide cavity of the base in the embodiment.

[0022] Reference numerals in the attached drawings: 1. Base; 11. Air-sealed cavity; 12. Air guide cavity; 2. Motor rotor; 3. Motor stator; 31. Stator slot; 32. Air gap; 33. Axial ventilation slot; 34. First air duct; 35. Axial mounting hole; 4. Rotating shaft; 41. Fan; 42. Second air duct; 43. Air guide tube; 5. Connecting rod; 51. Pressure head; 6. Coil; 61. Insulating seal; 62. Insulating sealing ring. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0024] Example: Figures 1-5 As shown, this embodiment provides a two-pole compact high-speed motor heat dissipation structure, including a frame 1, a motor rotor 2, and a motor stator 3. The motor rotor 2 is rotatably mounted in the frame 1; the motor stator 3 is fixedly mounted in the frame 1, and the motor rotor 2 is coaxially located in the axial central channel of the motor stator 3; a plurality of axial stator slots 31 are opened on the inner side wall of the motor stator 3, and there is an air gap 32 between the motor stator 3 and the motor rotor 2. The air gap 32 and the stator slots 31 form a first air duct 34.

[0025] Several axially penetrating axial ventilation slots 33 are opened on the outer side wall of the motor stator 3; the first air duct 34, the axial ventilation slots 33 and the cavities located at opposite ends of the motor stator 3 in the base 1 form an internal circulation air path.

[0026] Through the above configuration, this embodiment eliminates the axial air hole in the rotor yoke of the traditional solution. Instead, ventilation through the rotor shaft hole is replaced by ventilation through the air gap 32 and stator slot 31. Axial ventilation slots 33 are formed on the outer diameter of the stator laminations and the outer diameter of the stator pressure ring, creating an internal circulation airflow path. This primarily circulates the heat from the air gap 32 and stator slot 31 to the axial ventilation slot 33 on the outer diameter of the stator. The axial ventilation slot 33 is adjacent to the inner wall of the frame 1, thereby reducing wind resistance and achieving thermal convection with the heat dissipation of the frame 1, thus improving heat dissipation capacity. With reasonable selection of the slot shape and the size of the air gap 32, the internal circulation efficiency can be improved. The ventilation through the air gap 32 and stator slot 31 directly cools the heat-generating elements on both sides of the air gap 32, resulting in superior heat dissipation efficiency.

[0027] Preferably, 12 axial ventilation slots 33 are evenly distributed circumferentially on the motor stator 3; and several stator slots 31 are evenly distributed circumferentially on the inner wall of the motor stator 3.

[0028] In a two-pole compact high-speed motor heat dissipation structure of this embodiment, the yoke of the motor stator has several axial mounting holes 35, and a connecting rod 5 passes through the axial mounting holes 35. The two ends of the connecting rod 5 are provided with pressure heads 51 to press the stator laminations of the motor stator 3.

[0029] An axial mounting hole 35 is added to the stator yoke to allow the connecting rod 5 to be inserted and then pressed by the pressure head 51 to tighten the stator lamination. This eliminates the commonly used method of opening a slot on the outer circle of the lamination and welding ribs, simplifying the structure, making assembly and processing convenient, and ensuring a stable connection.

[0030] Optionally, 12 axially penetrating axial ventilation slots 33 are provided on the outer diameter of the motor stator lamination.

[0031] Optionally, the yoke of the motor stator has 12 axial mounting holes 35, which are also called axial core screw stacking holes.

[0032] Both the axial ventilation slot 33 and the axial mounting hole 35 have 12 holes. Due to the limitations of the calculation results of the electromagnetic scheme for the lamination and the internal circulation gas flow rate, it is more reasonable to use 12 holes in total.

[0033] In this embodiment of a two-pole compact high-speed motor heat dissipation structure, the connecting rod 5 is a screw, one of which, pressure head 51, is the end of the screw, and the other pressure head 51 is a nut threaded onto the screw; or both pressure heads 51 are nuts threaded onto the screw. Using a long screw to tighten the stator core provides better rigidity, significantly reduces the difficulty of the core tightening process, simplifies the structure, facilitates assembly, and ensures stable connection.

[0034] In a two-pole compact high-speed motor heat dissipation structure of this embodiment, an insulating sealing member 61 is wound around the outer periphery of the coil 6 that extends out of one end of the motor stator 3 and is adjacent to the motor rotor 2.

[0035] In a two-pole compact high-speed motor heat dissipation structure of this embodiment, an air guide duct 43 is fixedly installed on the side wall of the rotating shaft 4 of the motor rotor 2, and an insulating sealing ring 62 is installed on the coil 6 opposite to the rotating shaft 4. The air guide duct 43 and the insulating sealing ring 62 are adjacent to each other to form an air-sealed cavity 11. A fan 41 is fixedly installed on the side wall of the rotating shaft 4. The fan 41 has a second air duct 42 inside. One end opening of the first air duct 34 and one end opening of the second air duct 42 are both located in the air-sealed cavity 11, and the other end opening of the second air duct 42 is located outside the air-sealed cavity 11.

[0036] With the above configuration, the air gap 32 and stator slot 31 ventilation, together with the added axial ventilation slot 33, form an internal circulation air path. The gas flow is driven by the rotation of the fan 41 to achieve internal circulation. To ensure the ventilation path of the internal circulation, the part of the coil 6 extending out of the iron core is sealed in the circumferential direction with an insulating seal 61, and an insulating sealing ring 62 cooperates with the air guide tube 43 to achieve the function of air sealing, ensuring that the ventilation from the air gap 32 and stator slot 31 enters the fan 41 and is discharged according to the path to achieve internal circulation.

[0037] Specifically, the insulating seal 61 is closer to the end of the motor stator 3 than the insulating seal ring 62.

[0038] In a two-pole compact high-speed motor heat dissipation structure of this embodiment, four air guide chambers 12 are provided on the base 1 near its opposite ends, and the four air guide chambers 12 are evenly distributed on the outer side wall of the base 1.

Claims

1. A compact heat dissipation structure for a two-pole high-speed motor, characterized in that, include: Base (1), The motor rotor (2) is rotatably mounted inside the base (1); The motor stator (3) is fixedly installed inside the frame (1), and the motor rotor (2) is coaxially located in the axial central channel of the motor stator (3). Several axial stator slots (31) are opened on the inner side wall of the motor stator (3). There is an air gap (32) between the motor stator (3) and the motor rotor (2). The air gap (32) and the stator slots (31) form the first air duct (34). Several axial ventilation slots (33) are opened on the outer side wall of the motor stator (3). The first air duct (34), the axial ventilation slots (33) and the cavities located at opposite ends of the motor stator (3) in the frame (1) form an internal circulation air path. A guide tube (43) is fixedly installed on the side wall of the shaft (4) of the motor rotor (2), and an insulating sealing ring (62) is installed on the coil (6) opposite to the shaft (4). The guide tube (43) and the insulating sealing ring (62) are adjacent to each other to form an air-sealed cavity (11). A fan (41) is fixedly installed on the side wall of the shaft (4) inside the base (1). The fan (41) has a second air duct (42). One end opening of the first air duct (34) and one end opening of the second air duct (42) are both located in the air-sealed cavity (11), and the other end opening of the second air duct (42) is located outside the air-sealed cavity (11). The air guide tube (43) is located inside the coil (6), and the outer end of the air guide tube (43) is close to the insulating sealing ring (62) inside the coil (6).

2. The two-pole compact high-speed motor heat dissipation structure according to claim 1, characterized in that, The yoke of the motor stator has several axial mounting holes (35), and a connecting rod (5) is inserted through the axial mounting holes (35). The two ends of the connecting rod (5) are provided with pressure heads (51) to press the stator laminations of the motor stator (3).

3. The two-pole compact high-speed motor heat dissipation structure according to claim 2, characterized in that, The connecting rod (5) is a screw rod, one of which is a pressure head (51) which is the end of the screw rod, and the other pressure head (51) is a nut threaded onto the screw rod.

4. The two-pole compact high-speed motor heat dissipation structure according to claim 1, characterized in that, An insulating seal (61) is wound around the outer periphery of the coil (6) that extends out of one end of the motor stator (3) and is adjacent to the motor rotor (2).

5. The two-pole compact high-speed motor heat dissipation structure according to claim 1, characterized in that, Four air guide chambers (12) are provided on the base (1) near its opposite ends, and the four air guide chambers (12) are evenly distributed on the outer side wall of the base (1).

6. The two-pole compact high-speed motor heat dissipation structure according to claim 2, characterized in that, The connecting rod (5) is a screw rod, and the two pressure heads (51) are nuts threaded onto the screw rod.

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