Cooling structure of motor stator

Abstract

The utility model relates to the technical field of motor stator cooling, in particular to a cooling structure of a motor stator, which comprises the motor stator, a winding groove and an outer wall filling groove are arranged on the motor stator, outer wall heat conduction paste is filled in the outer wall filling groove, a motor shell is sleeved outside the motor stator, and a heat conduction insertion sheet is inserted in the outer wall filling groove. The motor shell is provided with a motor base and a cover plate screw groove, the motor shell is provided with a motor inner cavity, the side wall of the motor inner cavity is provided with an inner wall filling groove, the inner wall filling groove is filled with inner wall heat conduction paste, the outer wall of the motor shell is provided with heat dissipation fins, the heat dissipation fins are provided with flow guide heat dissipation holes and heat dissipation strips, and the heat dissipation strips are provided with heat dissipation film layers. Stable contact between the outer wall of the motor stator and the inner wall of the motor shell is guaranteed, heat generated by working of the motor stator is rapidly and effectively conducted, dissipated and cooled, and the situation that thin and sharp heat dissipation fins rub the skin of a worker can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of motor stator cooling, in particular to a cooling structure for a motor stator. Background Art

[0002] There are many types of motors, and the permanent magnet synchronous motor is a commonly used one. The permanent magnet synchronous motor is widely used in industrial control systems, wind power generation, unmanned aerial vehicles, medical equipment, elevators and escalators, servo systems and other fields.

[0003] The permanent magnet synchronous motor generally consists of a motor rotor, a main shaft, a motor stator, windings, and a motor housing. Among them, winding grooves are provided on the motor stator, and the windings are wound in the winding grooves. The outer wall of the motor stator is generally installed in the motor housing through bolts for convenient disassembly, maintenance, and replacement in the later stage.

[0004] At present, when the motor is working, the heat generated by the motor rotor and the motor stator needs to be transferred from the motor stator to the motor housing and dissipated. However, for the existing permanent magnet synchronous motor, since the outer wall of its motor stator is generally installed in the motor housing through bolts, there will be a certain gap between the outer wall of the motor stator and the inner wall of the motor housing, and the heat cannot be quickly conducted and dissipated, resulting in heat accumulation between the outer wall of the motor stator and the inner wall of the motor housing, greatly reducing the effective dissipation and cooling of the heat, and thus affecting the service life of the motor.

[0005] Therefore, a cooling structure for the motor stator on a permanent magnet synchronous motor is needed to solve the above problems. Summary of the Utility Model

[0006] The purpose of the utility model is to propose a cooling structure for a motor stator to solve the above-mentioned disadvantages existing in the prior art.

[0007] To achieve the above purpose, the utility model adopts the following technical scheme:

[0008] Design a cooling structure for a motor stator, including a motor stator. Winding grooves and outer wall filling grooves are provided on the motor stator. Outer wall thermal paste is filled in the outer wall filling grooves. A motor housing is sleeved outside the motor stator. Thermal conduction inserts are inserted into the outer wall filling grooves. A motor base and a cover plate screw groove are provided on the motor housing. Mounting holes are provided on the motor base. A motor inner cavity is provided on the motor housing. Inner wall filling grooves are provided on the side wall of the motor inner cavity. Inner wall thermal paste is filled in the inner wall filling grooves. Heat dissipation fins are provided on the outer wall of the motor housing. Flow guiding heat dissipation holes and heat dissipation strips are provided on the heat dissipation fins. A heat dissipation film layer is provided on the heat dissipation strips.

[0009] Further, the outer wall filling grooves and the inner wall filling grooves are in a group, and there are a total of sixteen groups arranged in a circle. The heat dissipation fins are sixteen arranged in a circle and are matched and aligned with each group of the outer wall filling grooves and the inner wall filling grooves.

[0010] Further, the outer wall filling grooves penetrate the motor stator horizontally, and the inner wall filling grooves penetrate the motor housing horizontally.

[0011] Further, the heat conduction inserts are made of red copper, and the heat conduction inserts are inserted into the outer wall filling grooves and the inner wall filling grooves.

[0012] Further, the heat dissipation fins are embedded on the outer wall surface of the motor housing. The heat dissipation fins are made of aluminum alloy. The diversion heat dissipation holes are two symmetrically arranged up and down and penetrate through the heat dissipation fins. Both ends of the diversion heat dissipation holes are in a diffused horn structure.

[0013] Further, both the outer wall heat-conducting paste and the inner wall heat-conducting paste are made of ceramic-based heat-conducting paste, and the outer wall heat-conducting paste and the inner wall heat-conducting paste are in uniform contact with the outer wall surface of the heat conduction inserts.

[0014] Further, the heat dissipation strips are arranged on the outer end surface of the heat dissipation fins. The front view cross-section of the heat dissipation strips is in a fan-shaped structure. The heat dissipation strips are made of elastic heat-conducting silica gel.

[0015] The cooling structure of a motor stator proposed by the present utility model has the beneficial effects as follows:

[0016] 1. By providing outer wall filling grooves with outer wall heat-conducting paste on the motor stator, and setting a matching heat conduction insert structure, at the same time, providing matching inner wall filling grooves and heat dissipation fins on the motor housing, and setting inner wall heat-conducting paste in the inner wall filling grooves, and then providing heat dissipation strips with a heat dissipation film layer and a diversion heat dissipation hole structure on the heat dissipation fins, the stable contact between the outer wall of the motor stator and the inner wall of the motor housing is ensured, thereby realizing the rapid, effective heat conduction, heat dissipation and cooling of the heat generated during the operation of the motor stator, and avoiding the accumulation of heat between the outer wall of the motor stator and the inner wall of the motor housing, which affects the service life of the motor.

[0017] 2. By providing a heat dissipation strip structure with a fan-shaped structure at the outer wall end of the heat dissipation fins, while ensuring the heat conduction and heat dissipation of the motor stator, it can avoid the thin and sharp heat dissipation fins from scratching the skin of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of the motor stator and the heat conduction inserts of the present utility model before being plugged and installed;

[0019] Figure 2Stereoscopic schematic diagram of the motor stator and the heat-conducting insertion piece of the present utility model after being plugged and installed;

[0020] Figure 3 Of the present utility model Figure 1 Stereoscopic schematic diagram of the motor stator in;

[0021] Figure 4 Of the present utility model Figure 1 Stereoscopic schematic diagram of the motor housing in;

[0022] Figure 5 Of the present utility model Figure 2 Front view schematic diagram in;

[0023] Figure 6 Of the present utility model Figure 5 Enlarged partial sectional view at X in;

[0024] In the figure: 1 motor stator; 11 winding grooves; 12 outer wall filling grooves; 121 outer wall thermal paste; 2 heat-conducting insertion piece; 3 motor housing; 31 motor inner cavity; 32 cover plate screw grooves; 4 motor base; 41 mounting holes; 5 inner wall filling grooves; 51 inner wall thermal paste; 6 heat dissipation fins; 61 flow guiding heat dissipation holes; 7 heat dissipation strips; 71 heat dissipation film layer. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0026] Referring to Figures 1-6 , a cooling structure of a motor stator includes a motor stator 1. Winding grooves 11 and outer wall filling grooves 12 are provided on the motor stator 1. Outer wall thermal paste 121 is filled in the outer wall filling grooves 12. A motor housing 3 is sleeved outside the motor stator 1. A heat-conducting insertion piece 2 is inserted in the outer wall filling grooves 12. A motor base 4 and cover plate screw grooves 32 are provided on the motor housing 3. Mounting holes 41 are provided on the motor base 4. A motor inner cavity 31 is provided on the motor housing 3. Inner wall filling grooves 5 are provided on the side wall of the motor inner cavity 31. Inner wall thermal paste 51 is filled in the inner wall filling grooves 5. Heat dissipation fins 6 are provided on the outer wall of the motor housing 3. Flow guiding heat dissipation holes 61 and heat dissipation strips 7 are provided on the heat dissipation fins 6. The motor stator 1, the motor housing 3, and the winding grooves 11 are all structures related to a permanent magnet synchronous motor, which are prior arts. Some prior structures are not drawn and labeled and need not be described in detail.

[0027] A heat dissipation film layer 71 is provided on the heat dissipation strip 7. The heat dissipation film layer 71 is a graphene film layer structure, which has excellent heat conduction and heat dissipation performance and is abrasion-resistant and durable.

[0028] Specifically, the outer wall filling groove 12 and the inner wall filling groove 5 form a group, with a total of sixteen groups arranged in a circle. The heat dissipation fins 6 are sixteen arranged in a circle and are aligned with each group of the outer wall filling groove 12 and the inner wall filling groove 5, so as to conduct the heat of each group of the outer wall filling groove 12 and the inner wall filling groove 5 to each heat dissipation fin 6 correspondingly, achieving a targeted heat dissipation and cooling effect.

[0029] Furthermore, the outer wall filling groove 12 runs horizontally through the motor stator 1, and the inner wall filling groove 5 runs horizontally through the motor housing 3, ensuring that the heat conduction insert 2 can be horizontally inserted into the aligned outer wall filling groove 12 and inner wall filling groove 5 later.

[0030] Still further, the heat conduction insert 2 is made of red copper. The heat conduction insert 2 is inserted into the outer wall filling groove 12 and the inner wall filling groove 5. The red copper material has a high heat conduction efficiency, and at the same time, the body material has a certain toughness and is durable.

[0031] More specifically, the heat dissipation fins 6 are embedded on the outer wall surface of the motor housing 3. The heat dissipation fins 6 are made of aluminum alloy. The diversion heat dissipation holes 61 are two symmetrically arranged up and down and penetrate through the heat dissipation fins 6. The two ends of the diversion heat dissipation holes 61 are both in a diffused horn structure. The aluminum alloy material has a high heat dissipation efficiency. Combined with the diversion heat dissipation holes 61, the heat accumulated between the heat dissipation fins 6 can be further diverted and dissipated.

[0032] Generally speaking, both the outer wall heat-conducting paste 121 and the inner wall heat-conducting paste 51 are made of ceramic-based heat-conducting paste. The outer wall heat-conducting paste 121 and the inner wall heat-conducting paste 51 are in uniform contact with the outer wall surface of the heat conduction insert 2. The ceramic-based heat-conducting paste material has excellent heat conductivity, and at the same time, the body is viscous, which can ensure the stable contact between the outer wall of the motor stator 1 and the inner wall of the motor housing 3.

[0033] Finally, the heat dissipation strips 7 are arranged on the outer end surface of the heat dissipation fins 6. The front view cross-section of the heat dissipation strips 7 is in a fan-shaped structure. The heat dissipation strips 7 are made of elastic heat-conducting silica gel material, which has a certain elasticity and at the same time has excellent heat conduction and heat dissipation performance, ensuring heat conduction and heat dissipation, and at the same time preventing the relatively thin and sharp heat dissipation fins 6 from scratching the skin of the staff.

[0034] Working mode: First, evenly fill and coat the outer wall heat-conducting paste 121 in the outer wall filling groove 12, then evenly fill and coat the inner wall heat-conducting paste 51 in the inner wall filling groove 5. Then, position and insert the motor stator 1 into the motor housing 3 and socket it with the motor stator preset in the motor housing 3 (prior art). Then, insert the heat-conducting insert 2 into the aligned outer wall filling groove 12 and inner wall filling groove 5. Finally, cover the preset motor cover plate with bolts and the cover plate screw groove 32 (prior art). The settings of the outer wall heat-conducting paste 121, the heat-conducting insert 2, and the inner wall heat-conducting paste 51 ensure stable contact between the outer wall of the motor stator 1 and the inner wall of the motor housing 3. When the motor is working, the heat generated by the motor stator 1 will be quickly transferred to the motor housing 3 made of aluminum alloy through the outer wall heat-conducting paste 121, the heat-conducting insert 2, and the inner wall heat-conducting paste 51, and then quickly dissipated through the heat dissipation fins 6, achieving a fast heat-conducting and cooling effect. At the same time, the provided diversion heat dissipation holes 61 and the heat dissipation film layer 71 can assist in diversion heat dissipation, realizing fast and effective heat-conducting and cooling of the heat generated during the operation of the motor stator 1, and avoiding heat accumulation between the outer wall of the motor stator 1 and the inner wall of the motor housing 3, which affects the service life of the motor.

[0035] In addition, by setting a fan-shaped heat dissipation strip 7 structure at the outer wall end of the heat dissipation fin 6, while ensuring heat conduction and dissipation of the motor stator 1, it can prevent the relatively thin and sharp heat dissipation fin 6 from scratching the skin of the staff.

[0036] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, making equivalent substitutions or changes, should be covered within the protection scope of the present invention.

Claims

1. A cooling structure for a motor stator, comprising a motor stator (1), characterized in that: The motor stator (1) is provided with a winding groove (11) and an outer wall filling groove (12), the outer wall filling groove (12) is filled with an outer wall thermal conductive paste (121), the motor housing (3) is sleeved on the outside of the motor stator (1), the outer wall filling groove (12) is inserted with a thermal conductive insert (2), the motor housing (3) is provided with a motor seat (4) and a cover plate screw groove (32), the motor seat (4) is provided with a mounting hole (41), the motor housing (3) is provided with a motor inner cavity (31), the side wall of the motor inner cavity (31) is provided with an inner wall filling groove (5), the inner wall filling groove (5) is filled with an inner wall thermal conductive paste (51), the outer wall of the motor housing (3) is provided with a heat dissipation fin (6), the heat dissipation fin (6) is provided with a guide heat dissipation hole (61) and a heat dissipation strip (7), and the heat dissipation strip (7) is provided with a heat dissipation film layer (71).

2. The cooling structure of a motor stator according to claim 1, characterized in that: The outer wall filling grooves (12) and the inner wall filling grooves (5) form a group, which is a total of sixteen groups arranged circumferentially. The heat dissipation fins (6) are sixteen in number and are matched and aligned with each group of the outer wall filling grooves (12) and the inner wall filling grooves (5).

3. The cooling structure of a motor stator according to claim 1, characterized in that: The outer wall filling groove (12) transversely penetrates the motor stator (1), and the inner wall filling groove (5) transversely penetrates the motor housing (3).

4. The cooling structure of a motor stator according to claim 1, characterized in that: The heat-conducting insert (2) is made of red copper, and the heat-conducting insert (2) is inserted into the outer wall filling groove (12) and the inner wall filling groove (5).

5. The cooling structure of a motor stator according to claim 1, characterized in that: The heat dissipation fins (6) are embedded in the outer wall surface of the motor housing (3); the heat dissipation fins (6) are made of aluminum alloy; the two flow-guiding heat dissipation holes (61) are symmetrical in upper and lower directions and penetrate the heat dissipation fins (6); and the openings at both ends of the flow-guiding heat dissipation holes (61) are diffused horn structures.

6. The cooling structure of a motor stator according to claim 1, characterized in that: The outer wall thermal conductive paste (121) and the inner wall thermal conductive paste (51) are both made of ceramic-based thermal conductive paste material, and the outer wall thermal conductive paste (121) and the inner wall thermal conductive paste (51) are in uniform contact with the outer wall surface of the thermal conductive insert (2).

7. The cooling structure of a motor stator according to claim 1, characterized in that: The heat dissipation strip (7) is arranged on the outer end surface of the heat dissipation fin (6); the front view cross section of the heat dissipation strip (7) is a fan-shaped structure; the heat dissipation strip (7) is made of elastic heat-conducting silicone material.

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