Dipolar compact type high-speed motor heat dissipation structure

Abstract

The invention relates to a dipolar compact high-speed motor heat dissipation structure, belongs to the technical field of motors, and solves the technical problems of poor heat dissipation effect and the like of wind path circulation in an existing motor. The heat dissipation structure comprises a motor base, a motor rotor and a motor stator, and the motor rotor is rotatably mounted in the motor base; the motor stator is fixedly arranged in the machine base, and the motor rotor is coaxially located in an axial center channel of the motor stator. A plurality of axial stator notches are formed in the inner side wall of the motor stator, an air gap exists between the motor stator and the motor rotor, and the air gap and the stator notches form a first air channel; a yoke part of the motor stator is provided with a plurality of axial ventilation holes; the first air channel, the axial ventilation hole and cavities located at the two opposite ends of the motor stator in the machine base form an internal circulation air path. Through the arrangement, rotor shaft hole ventilation is canceled, air gaps and stator notches are matched for ventilation, the axial ventilation holes are formed in the stator yoke part, an internal circulation air path is formed, and the internal circulation efficiency can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of motors, and in particular relates to a two-pole compact high-speed motor heat dissipation structure. Background Art

[0002] Currently, for the two-pole compact high-speed motors on the market, the industry generally designs internal air circulation by setting several air guide cavities on the base and the core, and setting axial ventilation holes on the rotor yoke, and then realizing internal circulation through fan rotation. This type of motor internal air circulation heat dissipation design is relatively rigid. On the stator side, further improving its internal circulation heat dissipation capacity is extremely limited by the base casting structure. Increasing the area of ​​the base air guide cavity will have a negative impact on the contact heat dissipation area between the outer circle of the core and the inner wall of the base; on the rotor side, the internal circulation cooling medium can only cool the rotor axial air holes and then cool the rotor bar temperature through heat conduction, and the heat dissipation effect is poor. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a two-pole compact high-speed motor heat dissipation structure to solve the technical problems such as poor heat dissipation effect of the existing motor internal air circulation.

[0004] In order to solve the above problems, the technical solution of the present invention is: a two-pole compact high-speed motor heat dissipation structure, comprising: Machine base; The motor rotor is rotatably mounted in the base; The motor stator is fixedly arranged in the base, and the motor rotor is coaxially located in the axial center channel of the motor stator; a plurality of axial stator slots are provided on the inner side wall of the motor stator, and an air gap exists between the motor stator and the motor rotor, and the air gap and the stator slot form a first air duct; a plurality of axial ventilation holes are provided on the yoke of the motor stator; the first air duct, the axial ventilation holes and the cavities located at opposite ends of the motor stator in the base form an internal circulation air path; An air guide is fixedly arranged on the side wall of the rotating shaft of the motor rotor, an insulating sealing ring is arranged on part of the coil of the motor stator, the air guide is adjacent to the insulating sealing ring, and the air guide, the insulating sealing ring, the motor rotor and the coil form an air-sealed cavity; a fan is fixedly arranged on the side wall of the rotating shaft in the machine base, and a second air duct is provided in the fan, 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.

[0005] Optionally, connecting rods are passed through a portion of the axial ventilation holes, and pressure heads are provided at both ends of the connecting rods to press stator punching sheets of the motor stator.

[0006] Optionally, the connecting rod is a screw rod, one of the pressing heads is the end of the screw rod, and the other pressing head is a nut threadedly mounted on the screw rod.

[0007] Optionally, an insulating seal is wrapped around the outer circumference of a coil extending out of one end of the motor stator and adjacent to the motor rotor, one end of the insulating seal is adjacent to or in sealing contact with one end of the motor stator, and the other end of the insulating seal is adjacent to or in sealing contact with an insulating sealing ring.

[0008] Optionally, a plurality of air guide cavities are provided on the base at both ends close to the motor stator.

[0009] Optionally, four air guide cavities are arranged on the base near two opposite ends thereof, and the four air guide cavities are evenly distributed on the outer side wall of the base.

[0010] Optionally, the connecting rod is a screw rod, and the two pressure heads are nuts threadedly mounted on the screw rod.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides a new internal air duct design concept, which optimizes the heat dissipation capacity of the motor, thereby improving the power density of the motor and improving material utilization.

[0012] 2. The present invention eliminates the stator outer circle buckle slot, thereby increasing the contact heat dissipation area between the stator core outer circle and the inner wall of the base.

[0013] 3. The present invention adopts a long screw to tighten the stator core, which has better rigidity and greatly reduces the difficulty of stator core tightening production. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of a heat dissipation structure in an embodiment; Figure 2 This is a schematic diagram of the installation of the connecting rod in the embodiment; Figure 3 A schematic diagram of the positions of the motor rotor and the motor stator in the embodiment; Figure 4 Schematic diagram of the structure of the air gap and the stator slot in the embodiment; Figure 5 Schematic diagram of the structure of the air guide cavity of the machine base in the embodiment.

[0015] Figure numerals: 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 hole; 34. first air duct; 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 DESCRIPTION

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0017] Example: Figure 1-Figure 5 As shown, this embodiment provides a two-pole compact high-speed motor heat dissipation structure, including a machine base 1, a motor rotor 2 and a motor stator 3, the motor rotor 2 is rotatably installed in the machine base 1; the motor stator 3 is fixedly arranged in the machine base 1, and the motor rotor 2 is coaxially located in the axial center channel of the motor stator 3; a plurality of axial stator slots 31 are provided on the inner side wall of the motor stator 3, an air gap 32 is provided between the motor stator 3 and the motor rotor 2, and the air gap 32 and the stator slot 31 form a first air duct 34; a plurality of axial ventilation holes 33 are provided on the yoke of the motor stator 3; the first air duct 34, the axial ventilation holes 33 and the cavities located at opposite ends of the motor stator 3 in the machine base 1 form an internal circulation air path; An air guide tube 43 is fixedly arranged on the side wall of the rotating shaft 4 near the right end thereof, an insulating sealing ring 62 is arranged on a part of the coil 6 of the motor stator 3, the air guide tube 43 is adjacent to the insulating sealing ring 62, and the air guide tube 43, the insulating sealing ring 62, the motor rotor 2 and the coil 6 form an air-sealed cavity 11; a fan 41 is fixedly arranged on the side wall of the rotating shaft 4 near the right end thereof, the fan 41 is located in the machine base 1, a second air duct 42 is provided in the fan 41, 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.

[0018] Through the above arrangement, the present embodiment cancels the axial air holes of the rotor yoke in the traditional solution, and changes the ventilation of the canceled axial air holes of the rotor yoke to ventilation with the air gap 32 and the stator slot 31, and opens an axial ventilation hole 33 on the yoke of the motor stator 3 to form an internal circulation air path. Under the reasonable selection of the slot type of the stator slot 31 and the size of the air gap 32, the internal circulation efficiency can be improved. The ventilation of the air gap 32 plus the stator slot 31 directly cools the heating elements on both sides of the air gap 32, and the heat dissipation efficiency is better. The air gap 32, the stator slot 31, the inner cavity of the base 1 and the added axial ventilation hole 33 of the yoke of the motor stator 3 form an internal circulation air path, and the fan 41 rotates to drive the gas to flow in the internal circulation air path to realize the internal circulation. In order to ensure the ventilation path of the internal circulation, the insulating sealing ring 62 cooperates with the air guide tube 43 to realize the role of air sealing, and ensures that the ventilation of the air gap 32 and the stator slot 31 enters the fan 41 according to the path and is discharged to realize the internal circulation.

[0019] Preferably, a plurality of axial ventilation holes 33 are evenly distributed on the motor stator 3 in the circumferential direction; and a plurality of stator slots 31 are evenly distributed on the inner side wall of the motor stator 3 in the circumferential direction.

[0020] In a two-pole compact high-speed motor heat dissipation structure of this embodiment, a portion of the axial ventilation holes 33 are penetrated by connecting rods 5 , and pressure heads 51 are provided at both ends of the connecting rods 5 to press the stator punching sheets of the motor stator 3 .

[0021] An axial ventilation hole 33 is provided at the yoke of the motor stator 3, and 8-12 of the axial ventilation holes 33 are used. After the connecting rod 5 is inserted into the axial ventilation hole 33, a pressure head 51 is provided on the connecting rod 5 to press the stator punching sheet, thereby eliminating the commonly used method of opening a buckle groove on the outer circle of the punching sheet and welding ribs in the industry, simplifying the structure, facilitating assembly and processing, and providing stable connection; in addition, the buckle groove on the outer circle of the stator punching sheet is eliminated, further increasing the contact and heat dissipation area between the outer circle of the core of the motor stator 3 and the inner wall of the base 1, and improving its heat dissipation effect. The axial ventilation hole 33 is not only used for gas to pass through, but also used for installing the connecting rod 5 to press the stator punching sheet, thereby improving material utilization, simplifying the structure, and providing stable connection.

[0022] In a two-pole compact high-speed motor heat dissipation structure of this embodiment, the connecting rod 5 is a screw, one of the pressure heads 51 is the end of the screw, and the other pressure head 51 is a nut threadedly mounted on the screw; or both pressure heads 51 are nuts threadedly mounted on the screw. The use of a long screw to tighten the stator core has better rigidity, greatly reduces the difficulty of the production process of tightening the core, has a simple structure, is easy to assemble, and has a stable connection.

[0023] In a two-pole compact high-speed motor heat dissipation structure of this embodiment, the outer circumference of the coil 6 extending out of one end of the motor stator 3 and adjacent to the motor rotor 2 is wrapped with an insulating seal 61, one end of the insulating seal 61 is adjacent to or in sealing contact with one end of the motor stator 3, and the other end of the insulating seal 61 is adjacent to or in sealing contact with the insulating seal ring 62. In order to ensure the ventilation path of the internal circulation, the part of the coil 6 extending out of the core is closed in the circumferential direction with the insulating seal 61 to prevent air from flowing out of the gap of the coil 6 and affecting the internal circulation effect.

[0024] In a two-pole compact high-speed motor heat dissipation structure of this embodiment, four air guide cavities 12 are arranged on the base 1 near the two opposite ends thereof, and the four air guide cavities 12 are evenly distributed on the outer side wall of the base 1 .

Claims

1. A two-pole compact high-speed motor heat dissipation structure, characterized in that: include: Machine base (1); A motor rotor (2) is rotatably mounted in the base (1); The motor stator (3) is fixedly arranged in a machine base (1), and the motor rotor (2) is coaxially located in an axial central channel of the motor stator (3); a plurality of axial stator slots (31) are provided on the inner side wall of the motor stator (3), an air gap (32) is provided between the motor stator (3) and the motor rotor (2), and the air gap (32) and the stator slot (31) form a first air duct (34); a plurality of axial ventilation holes (33) are provided on the yoke of the motor stator (3); the first air duct (34), the axial ventilation holes (33) and the cavities located at opposite ends of the motor stator (3) in the machine base (1) form an internal circulation air path; An air guide tube (43) is fixedly arranged on the side wall of the rotating shaft (4) of the motor rotor (2), an insulating sealing ring (62) is arranged on part of the coil (6) of the motor stator (3), the air guide tube (43) is adjacent to the insulating sealing ring (62), and the air guide tube (43), the insulating sealing ring (62), the motor rotor (2) and the coil (6) form an air-sealed cavity (11); a fan (41) is fixedly arranged on the side wall of the rotating shaft (4) in the machine base (1), a second air duct (42) is provided in the fan (41), 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).

2. A two-pole compact high-speed motor heat dissipation structure according to claim 1, characterized in that: A connecting rod (5) is inserted through a portion of the axial ventilation holes (33), and pressure heads (51) are arranged at both ends of the connecting rod (5) to press the stator punching sheets of the motor stator (3).

3. A 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 has a pressing head (51) as the end of the screw rod, and the other pressing head (51) as a nut threadedly mounted on the screw rod.

4. A 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 circumference of a coil (6) extending out of one end of a motor stator (3) and adjacent to a motor rotor (2); one end of the insulating seal (61) is adjacent to or in sealing contact with one end of the motor stator (3); and the other end of the insulating seal (61) is adjacent to or in sealing contact with an insulating seal ring (62).

5. A two-pole compact high-speed motor heat dissipation structure according to claim 1, characterized in that: A plurality of air guide cavities (12) are arranged at both ends of the machine base (1) close to the motor stator (3).

6. A two-pole compact high-speed motor heat dissipation structure according to claim 5, characterized in that: Four air guide cavities (12) are arranged on the machine base (1) near two opposite ends thereof, and the four air guide cavities (12) are evenly distributed on the outer side wall of the machine base (1).

7. A 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 pressing heads (51) are nuts threadedly mounted on the screw rod.

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