Motor stator structure cooled by air and water

Abstract

The utility model relates to a motor stator structure cooled by air and water, which comprises an end cover, an air deflector, a fan, a rotating shaft, an air pipe, spoilers, an outer sleeve, a water jacket and a stator core, the stator end plate is arranged on the periphery of the stator core, a spiral water tank is arranged outside the water jacket, a hole is formed in the middle of the spiral water tank, the air pipe penetrates through the hole, and the air pipe is connected with the water jacket through interference; a spoiler is arranged in the spiral water tank, an outer sleeve is connected outside the water jacket, two sides of the outer sleeve are respectively connected with an end cover through a stator end plate, an air deflector is arranged in each end cover, a water inlet / outlet is formed in the outer sleeve, and the water inlet / outlet is communicated with the spiral water tank of the water jacket; two ends of the rotating shaft are connected with fans. According to the air-water mixed cooling motor stator structure, air cooling in the motor can be realized through external cooling water and the motor rotor fan, and meanwhile, the protection performance of the motor is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to an air-water mixed cooling motor stator structure. Background Art

[0002] In recent years, with the continuous increase in motor power density, the problem of motor temperature rise has received more and more attention. The traditional heat dissipation method of the motor stator is to directly open a water channel on the outside of the stator for water cooling, and the cooling water is cooled by external equipment. This increases the complexity of the system, and for motors with higher protection requirements, the air inside the motor is difficult to be well cooled, which will cause the motor temperature to rise. Long-term high temperature will also damage the motor insulation and affect the motor service life. Therefore, it is necessary to improve the traditional single-stator water-cooled motor. Summary of the invention

[0003] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the utility model is to provide a motor stator structure with air-water mixed cooling, which can achieve air cooling inside the motor through external cooling water and a motor rotor fan while ensuring the protection performance of the motor.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an air-water-cooled motor stator structure, including an end cover, an air guide plate, a fan, a rotating shaft, an air duct, a spoiler, an outer sleeve, a water jacket, a stator core, and a stator end plate. A water jacket is provided on the outer periphery of the stator core, a spiral water trough is provided on the outside of the water jacket, a hole is opened in the middle of the spiral water trough, an air duct is passed through the hole, and the air duct is connected to the water jacket through interference fit; a spoiler is provided in the spiral water trough, the outer sleeve is connected to the water jacket outside, and an end cover is connected to the stator end plate on both sides of the outer sleeve, an air guide plate is provided in the end cover, a water inlet and outlet are provided on the outer sleeve, and the water inlet and outlet are communicated with the spiral water trough of the water jacket; fans are connected to both ends of the rotating shaft.

[0005] Furthermore, the outer diameter of the air duct is smaller than the inner diameters of the water jacket, the outer sleeve, and the upper hole of the stator end plate.

[0006] Furthermore, there are gaps between the lower surface of the spoiler and the lower surface of the spiral water groove of the water jacket, and between the upper surface of the spoiler and the inner surface of the outer sleeve.

[0007] Furthermore, the spoiler is C-shaped.

[0008] Furthermore, the opening directions of the spoilers on two adjacent air ducts are opposite.

[0009] Beneficial effects of the utility model:

[0010] Under the premise of ensuring the protection level, the air is circulated inside the stator through the rotation of the fan. Assuming that the air enters the stator-rotor air gap from the right end, takes away the heat of the rotor and stator teeth, and then enters the air duct after reaching the left end, the hot air exchanges heat with the cooling water in the water tank through the air duct and the spoiler outside it, and then reaches the right end to circulate. In order to ensure the contact between the water flow and the inner wall of the water tank, there is a gap between the lower surface of the spoiler and the lower surface of the water tank of the water jacket, and between the upper surface of the spoiler and the inner surface of the outer sleeve. Therefore, the air-water mixed cooling motor stator structure of the utility model can achieve air cooling inside the motor through external cooling water and the motor rotor fan, while ensuring the protection performance of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the overall structure of the motor stator with air-water mixed cooling of the utility model;

[0012] Figure 2 It is a schematic diagram of the stator of the utility model;

[0013] Figure 3 This is a schematic diagram of the connection between the air duct and the spoiler of the utility model;

[0014] Figure 4 It is a schematic diagram of a spoiler of the utility model;

[0015] Figure 5 This is a diagram showing the arrangement of adjacent spoilers in a water tank according to the utility model;

[0016] Figure 6 It is a schematic diagram of the working principle of the utility model. DETAILED DESCRIPTION

[0017] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0018] like Figure 1 As shown, an air-water-cooled motor stator proposed in an embodiment of the utility model comprises a left end cover 1, a left air guide plate 2, a left fan 3, a rotating shaft 4, a water inlet and outlet 5, a right end cover 6, a right fan 7, a right air guide plate 8, an air duct 9, a spoiler 10, an outer sleeve 11, a water jacket 12, a stator core 13, and a stator end plate 14. The stator end plate 14 is provided with holes of the same number, angle, and size.

[0019] like Figure 2 As shown, the water jacket 12 has a spiral water groove on the outside, a hole is opened in the middle of the water groove, and an air duct 9 is passed through the hole. The air duct 9 is connected to the water jacket 12 through interference fit; for ease of installation, the outer diameter of the air duct 9 is controlled to be slightly smaller than the inner diameter of the hole on the water jacket 12, the outer sleeve 11, and the stator end plate 14 during the production process.

[0020] During installation, first extend the air duct 9 to the first water tank through which it passes, insert the spoiler 10 into the air duct, and then insert the air duct 9 into the second water tank, and so on. The installation method of an air duct 9 and a set of spoilers 10 is as follows: Figure 3 As shown; after the installation of an air duct 9 and a set of spoilers 10 is completed, the air duct 9 and the water jacket 12, the outer sleeve 11, and the interference fit between the holes on the stator end plate 14 are achieved through the expansion process; it should be noted that the spoiler 10 is C-shaped, such as Figure 4 and the opening directions of the spoilers 10 on the two adjacent air ducts 9 are opposite, such as Figure 5 As shown, the water flow in the spiral groove flows in an S shape, increasing the length of the water flow.

[0021] After all the air ducts 9 and spoilers 10 are installed, the left air guide plate 2 and the right air guide plate 8 are installed on the stator, and then the left end cover 1 and the right end cover 6 are installed at the corresponding positions respectively.

[0022] The working principle of this utility model:

[0023] Under the premise of ensuring the protection level, the fan blades are designed well, and the air is circulated inside the stator by using the rotation of the fan. The flow direction is as follows: Figure 6 As shown, it is assumed that the air enters the stator-rotor air gap from the right end, takes away the heat of the rotor and stator teeth, and then enters the air duct 9 after reaching the left end. The hot air exchanges heat with the cooling water in the water tank through the air duct 9 and the spoiler 10 outside it, and then reaches the right end, thus circulating. In order to ensure smooth airflow, it is necessary to ensure that the left side of the left air guide plate 2 is close to the inner wall of the left end cover 3, and the right side of the right air guide plate 6 is aligned with the top of the right fan 7. The spoiler 10 is C-shaped, which can make the water flow in the spiral groove flow in an S shape, increasing the length of the water flow without increasing the flow resistance too much. In order to ensure the contact between the water flow and the inner wall of the water tank, there is a gap between the lower surface of the spoiler 10 and the lower surface of the water tank of the water jacket 12, and the upper surface of the spoiler 10 and the inner surface of the outer sleeve 11.

Claims

1. An air-water cooled motor stator structure, characterized in that: It includes an end cover, an air guide plate, a fan, a rotating shaft, an air duct, a spoiler, an outer sleeve, a water jacket, a stator core, and a stator end plate. A water jacket is provided on the outer periphery of the stator core, a spiral water trough is provided on the outside of the water jacket, a hole is opened in the middle of the spiral water trough, an air duct is passed through the hole, and the air duct is connected to the water jacket through an interference fit; a spoiler is provided in the spiral water trough, the outer sleeve is connected to the outside of the water jacket, an end cover is connected to each other on both sides of the outer sleeve through the stator end plate, an air guide plate is provided in the end cover, a water inlet and outlet are provided on the outer sleeve, and the water inlet and outlet are communicated with the spiral water trough of the water jacket; fans are connected to both ends of the rotating shaft.

2. The air-water cooled motor stator structure according to claim 1 is characterized in that: The outer diameter of the air duct is smaller than the inner diameter of the water jacket, the outer sleeve and the upper hole of the stator end plate.

3. The air-water cooled motor stator structure according to claim 1 is characterized in that: Gaps are left between the lower surface of the spoiler and the lower surface of the spiral water groove of the water jacket, and between the upper surface of the spoiler and the inner surface of the outer sleeve.

4. The air-water cooled motor stator structure according to claim 1 is characterized in that: The spoiler is C-shaped.

5. The air-water cooled motor stator structure according to claim 1, characterized in that: The opening directions of the spoilers on two adjacent air ducts are opposite.

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