Motor base with cooling function

Abstract

The utility model discloses a motor base with a cooling function, which relates to the technical field of motors and comprises a base outer sleeve, a base inner sleeve, a stator core, a water inlet seat and a water outlet seat. And the wall thickness of the base outer sleeve is properly increased to strengthen the function of the base outer sleeve serving as an effective support body of the motor, so that the base inner sleeve only plays a role in sealing a cooling medium in the spiral groove, and the base outer sleeve has a core supporting task and does not need to be subjected to complex spiral water groove processing treatment, so that the cost is reduced. Therefore, the wall thickness of the inner sleeve of the base can be 2-5mm, and the reduction of the wall thickness of the inner sleeve further shortens the distance between the cooling medium and the stator iron core, thereby greatly improving the conduction efficiency of the cooling medium to the heat in the stator iron core, and remarkably optimizing the overall heat dissipation effect.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a motor base with a cooling function. Background Art

[0002] Motors include electric motors and generators. Electric motors are devices that convert electrical energy into mechanical energy. Electric motors use energized coils to generate a rotating magnetic field and act on the rotor to form a magneto-electrical rotational torque. Electric motors are divided into DC motors and AC motors according to the power supply used. When the motor is working, it will generate a lot of heat. If the heat is not dissipated in time, it will affect the normal operation of the generator. Therefore, the motor has high requirements for the heat dissipation effect of the base. The heat dissipation effect of the motor base directly affects the working efficiency of the motor and may even cause damage to the motor.

[0003] The traditional cylindrical motor heat dissipation design usually relies on the heat dissipation ribs on the outer surface of the motor casing to radiate heat to the outside, such as the common Y series and Y2 series motors. In order to further improve the heat dissipation efficiency, some designs add an internal fan inside the motor, or install an external fan or blower at the tail of the motor to enhance the air flow on the surface of the motor, thereby accelerating the heat dissipation. These measures have indeed achieved certain results in reducing the temperature rise of the motor. However, with the continuous development of social economy, people's requirements for motor performance are also constantly increasing, hoping that the motor structure is more compact and the energy density is higher. Against this background, the water-cooled aluminum shell base came into being. Although the water-cooled aluminum shell base has improved its heat dissipation performance, its mold opening cost is high, especially when manufacturing large motor molds, it faces many difficulties. Therefore, it is particularly urgent to find a more efficient and economical heat dissipation solution.

[0004] The invention patent application with publication number CN102510158A discloses a motor with a water-cooled base, specifically a large motor with a new cooling water jacket base, including a base, a stator, a rotor, an end cover and a rotating shaft; the base includes an outer base and an inner base; a plurality of spiral water grooves are processed on the outer circumferential surface of the inner base, and a circular water collecting groove is processed at each end of the outer circumferential surface, each spiral water groove rotates several times along the axial direction at equal intervals, and is directly connected to the water collecting grooves at both ends; there are two baffles in each of the two water collecting grooves, which separate the water collecting grooves into an inlet water collecting groove and an outlet water collecting groove; the inlet water collecting groove and the outlet water collecting groove are respectively connected to the inlet pipe joint and the outlet pipe joint on the outer base to form a cooling water path, so that the inlet water and the outlet water flow symmetrically along the axial direction.

[0005] The utility model patent with publication number CN209488341U discloses a spiral water groove heat dissipation base for a motor, the base includes a base inner cylinder and a base outer cylinder, the middle section of the base inner cylinder is provided with a spiral water groove, the maximum outer diameter of the middle section is smaller than the outer diameters at both ends, the inner diameter of the base outer cylinder is equal to the maximum outer diameter of the middle section of the base inner cylinder, the length is equal to the middle section of the base inner cylinder, and it is sleeved on the middle section of the base inner cylinder, the two end surfaces are sealed and connected to the step surfaces at both ends of the middle section of the base inner cylinder, the upper right corner of the base outer cylinder is provided with a water inlet seat, and the lower left corner is provided with a water outlet seat.

[0006] However, the technical solutions described in the above two patents both involve precisely machining spiral water cooling grooves on the outer wall of the motor base inner sleeve. This feature actually limits the wall thickness of the base inner sleeve to not be too thin. It should be understood that a large amount of heat generated during the operation of the motor mainly comes from the stator core and the winding coil, and the stator core achieves the purpose of efficient heat transfer and wall heat dissipation through close cooperation with the inner wall of the base. Therefore, high requirements are placed on the dimensional accuracy and mechanical strength of the base inner sleeve. When the spiral groove is machined on the base inner sleeve, it is inevitable to face the problem of large material removal. If the wall thickness of the inner sleeve is designed to be too thin, it is difficult to ensure that the dimensional stability and structural integrity of the inner sleeve can be maintained after the complex processing process is completed. At the same time, the core function of the base is not only to construct an effective cooling and heat dissipation channel, but also to bear the mechanical support of the entire generator. Therefore, there are strict standards for its rigidity. In the stator base structure design mentioned in these two patents, the base inner wall plays a major supporting role. In order to ensure that sufficient rigidity can be provided to support the overall structure of the generator, the thickness of the base inner wall cannot be excessively reduced.

[0007] Therefore, it is an urgent problem to be solved by those skilled in the art to provide a motor base with a cooling function and a thinner inner sleeve of the base and better heat dissipation effect. Summary of the invention

[0008] The utility model aims to provide a motor base with a cooling function. By processing a spiral water groove on the inner wall of the base outer sleeve, the wall thickness of the base inner sleeve can be 2-5mm, the heat dissipation effect is better, and it has the advantages of simple structure and easy operation.

[0009] In order to achieve the above-mentioned object of the invention, the technical solution of the present invention is as follows:

[0010] A motor base with a cooling function comprises a base outer sleeve, a base inner sleeve, a stator core, a water inlet seat and a water outlet seat, wherein a driving end pressure ring and a non-driving end pressure ring are respectively arranged at both ends of the stator core, the base inner sleeve is arranged in the middle position of the side of the stator core, the base outer sleeve is arranged outside the base inner sleeve, the base outer sleeve is sealed and connected to the base inner sleeve, annular water grooves are arranged at both ends of the inner wall of the base outer sleeve, a spiral groove is arranged in the middle section of the inner wall, the outer wall of the base outer sleeve is respectively provided with a water inlet seat connected to the annular water groove on one side, and a water outlet seat connected to the annular water groove on the other side, and the wall thickness of the base inner sleeve is 2-5mm.

[0011] The annular water groove is arranged at the driving end pressure ring and the non-driving end pressure ring, and the cooling medium is introduced to the pressure ring, which can well cool the coil end and reduce the temperature rise of the motor.

[0012] The spiral groove on the inner wall of the housing is a single-branch or multi-branch parallel spiral groove.

[0013] The inner sleeve of the base and the stator core are in interference fit.

[0014] The machine base outer sleeve and the machine base inner sleeve are interference fit.

[0015] Locking pins for positioning the base housing with the driving end pressure ring and the non-driving end pressure ring are provided at both ends of the base housing.

[0016] The cooling liquid is sealed between the machine base outer sleeve and the machine base inner sleeve through a weld.

[0017] The water inlet seat and the water outlet seat are located on the same side of the motor, so that the entire external pipeline is easy to arrange.

[0018] Beneficial effects of the utility model:

[0019] 1. In the utility model, the inner wall of the outer sleeve of the base is processed with spiral water grooves, and the wall thickness of the outer sleeve of the base is appropriately increased to strengthen its function as an effective support body of the motor, so that the inner sleeve of the base only plays the role of sealing the cooling medium in the spiral grooves. Since the outer sleeve of the base has assumed the core support task, and the inner sleeve of the base does not need to be processed with complicated spiral water grooves, the wall thickness of the inner sleeve of the base can be 2-5mm. The reduction in the wall thickness of the inner sleeve further shortens the distance between the cooling medium and the stator core, thereby greatly improving the heat conduction efficiency of the cooling medium to the internal heat of the stator core, and significantly optimizing the overall heat dissipation effect.

[0020] 2. In the utility model, the annular water groove is arranged at the driving end pressure ring and the non-driving end pressure ring to introduce the cooling medium to the pressure ring; the end of the stator coil is close to the pressure ring, and the heat generated by it needs to be taken away by the pressure ring. After the pressure ring introduces the cooling medium, the heat generated by the coil end can be taken away. The spiral water groove located in the axial middle section of the base wall can only take away the heat of the stator core, and the end of the motor coil will also generate heat. A water collecting groove is opened on the pressure ring, and the heat of the coil end can be transferred to the cooling medium through the pressure ring to reduce the temperature rise. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The utility model is a schematic diagram of the structure of the motor base with cooling function.

[0022] Among them; 1. Machine base outer sleeve; 2. Machine base inner sleeve; 3. Annular water trough; 4. Press ring; 5. Stator core; 6. Water inlet seat; 7. Water outlet seat; 8. Spiral groove. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the embodiments, but the implementation manner of the present invention is not limited thereto.

[0024] Example 1

[0025] This embodiment provides a motor base with a cooling function, such as Figure 1 As shown, it includes a base outer sleeve 1, a base inner sleeve 2, a stator core 5, a water inlet seat 6 and a water outlet seat 7. The two ends of the stator core 5 are respectively provided with a driving end pressure ring 4 and a non-driving end pressure ring 4. The base inner sleeve 2 is thermally sleeved in the middle position of the side of the stator core 5. The base outer sleeve 1 is thermally sleeved outside the base inner sleeve 2. The base outer sleeve 1 is sealed and connected to the base inner sleeve 2. The inner wall of the base outer sleeve 1 is provided with annular water grooves 3 at both ends, and a spiral groove 8 is provided in the middle section of the inner wall. The outer wall of the base outer sleeve 1 is respectively provided with a circular water flow groove 3 connected to one side. The water inlet seat 6 is connected to the groove 3, and the water outlet seat 7 is connected to the annular water groove 3 on the other side. The wall thickness of the base inner sleeve 2 is 5mm; the spiral groove 8 on the inner wall of the base outer sleeve 1 is a single-branch spiral groove 8; the base outer sleeve 1 is formed by rolled welded steel plates; locking pins for positioning between the base outer sleeve 1 and the driving end pressure ring 4 and the non-driving end pressure ring 4 are provided at both ends of the base outer sleeve 1; the coolant is sealed between the base outer sleeve 1 and the base inner sleeve 2 by a weld, and the motor in this embodiment is a 400KW permanent magnet synchronous motor.

[0026] In this embodiment, after the motor is started, the cooling medium is introduced through the water inlet seat 6, and the cooling medium passes through the annular water groove 3 and then enters the spiral groove 8 of the base outer sleeve 1. In the spiral groove 8, the cooling medium continuously flows and exchanges heat with the base inner sleeve 2, thereby cooling the stator core 5 inside the base. Finally, the cooling medium is discharged from the water outlet seat 7 after heat absorption and transfer, completing the entire cycle cooling process.

[0027] Example 2

[0028] Compared with Example 1, the present embodiment is different in that, in the present embodiment, the annular water groove 3 is arranged at the driving end pressure ring 4 and the non-driving end pressure ring 4, the wall thickness of the base inner sleeve 2 is 2 mm; the spiral groove 8 on the inner wall of the base outer sleeve 1 is a multi-branch parallel spiral groove 8; the water inlet seat 6 and the water outlet seat 7 are located on the same side of the motor; and the remaining structure is the same as that of Example 1.

[0029] In this embodiment, the annular water groove 3 is arranged at the driving end pressure ring 4 and the non-driving end pressure ring 4 to introduce the cooling medium to the pressure ring 4; the end of the stator coil is close to the pressure ring 4, and the heat generated by it needs to be taken away by the pressure ring 4. After the cooling medium is introduced into the pressure ring 4, the heat generated by the coil end can be taken away. The spiral water groove located in the axial middle section of the base wall can only take away the heat of the stator core 5, and the end of the motor coil will also generate heat. A water collecting groove is opened on the pressure ring 4, and the heat of the coil end can be transferred to the cooling medium through the pressure ring 4 to reduce the temperature rise.

[0030] Comparative Example 1

[0031] The difference between this comparative example and Example 1 is that in this comparative example, annular water grooves 3 are provided at both ends of the outer wall of the base inner sleeve 2, a spiral groove 8 is provided in the middle section of the outer wall, the wall thickness of the base inner sleeve 2 is 30 mm, and the rest of the structure is the same as that of Example 1.

[0032] The temperature inside the motor after the motor using the motor base of Example 1-2 and Comparative Example 1 runs stably for a period of time at a cooling water inlet temperature of 30 degrees is shown in Table 1;

[0033] Table 1 Motor temperature of Examples 1-2 and Comparative Example 1

[0034]

[0035] It can be seen from the test data in the above table that the cooling effect of Example 2 is the best. Under the same cooling conditions, the temperature of the generator is the lowest, followed by Example 1. Comparative Example 1 has the highest temperature and the worst cooling effect.

[0036] Compared with Example 1, the water collecting groove of Example 2 is located at the pressure ring 4, and the coil end is close to the wall of the pressure ring 4, and the heat is taken away by cooling water, while there is no water collecting groove at the pressure ring 4 of Example 1, and the heat at the coil end cannot be taken away by cooling water; the wall thickness of the inner sleeve 2 of the base in Example 2 is 2mm, while the wall thickness of the inner sleeve 2 of the base in Example 1 is 5mm, so the cooling effect of Example 2 is better and the motor temperature is the lowest.

[0037] The heat of Example 1, Example 2 and Comparative Example 1 is conducted to the cooling water by the stator base inner sleeve 2 to realize the cooling of the motor. Compared with Example 1 and Example 2, the wall thickness of the base inner sleeve 2 of Comparative Example 1 is 30 mm, while the wall thickness of the base inner sleeve 2 of Example 1 and Example 2 is very thin, less than or equal to 5 mm, so the cooling effect of Example 1 and Example 2 is better.

[0038] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A motor base with a cooling function, comprising a base outer sleeve (1), a base inner sleeve (2), a stator core (5), a water inlet seat (6) and a water outlet seat (7), characterized in that: A driving end pressure ring (4) and a non-driving end pressure ring (4) are respectively provided at both ends of the stator core (5); the base inner sleeve (2) is sleeved on the middle position of the side of the stator core (5); the base outer sleeve (1) is sleeved outside the base inner sleeve (2); the base outer sleeve (1) is sealedly connected to the base inner sleeve (2); annular water grooves (3) are provided at both ends of the inner wall of the base outer sleeve (1); a spiral groove (8) is provided in the middle section of the inner wall; an inlet seat (6) connected to the annular water groove (3) on one side and a water outlet seat (7) connected to the annular water groove (3) on the other side are respectively provided on the outer wall of the base outer sleeve (1); and the wall thickness of the base inner sleeve (2) is 2-5 mm.

2. The motor base with cooling function according to claim 1, characterized in that: The annular water groove (3) is arranged at the positions of the driving end pressure ring (4) and the non-driving end pressure ring (4).

3. The motor base with cooling function according to claim 1, characterized in that: The spiral groove (8) on the inner wall of the machine base outer casing (1) is a single-branch or multi-branch parallel spiral groove (8).

4. The motor base with cooling function according to claim 1, characterized in that: The base inner sleeve (2) and the stator core (5) are in interference fit.

5. The motor base with cooling function according to claim 1, characterized in that: The machine base outer sleeve (1) and the machine base inner sleeve (2) are interference fit.

6. The motor base with cooling function according to claim 1, characterized in that: Both ends of the machine base outer sleeve (1) are provided with locking pins for positioning between the machine base outer sleeve (1) and the driving end pressure ring (4) and the non-driving end pressure ring (4).

7. The motor base with cooling function according to claim 1, characterized in that: The cooling liquid is sealed between the machine base outer sleeve (1) and the machine base inner sleeve (2) by means of a weld.

8. The motor base with cooling function according to claim 1, characterized in that: The water inlet seat (6) and the water outlet seat (7) are located on the same side of the motor.

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