Motor heat dissipation cooling device

Abstract

The utility model discloses a motor radiating and cooling device, which comprises a motor stator and heat exchangers arranged at two ends of the motor stator. The heat exchanger comprises a bottom plate, a cavity plate, a liquid inlet pipe and a liquid outlet pipe. The bottom plate is attached to the end face of the motor stator and provided with an installation hole used for being fixed to the end face of the motor stator. The cavity plate is installed on the bottom plate, and a cooling cavity is defined by the cavity plate and the bottom plate. The liquid inlet pipe and the liquid outlet pipe are installed on the cavity plate and communicated with the cooling cavity, and cooling liquid enters the cooling cavity through the liquid inlet pipe and then flows out through the liquid outlet pipe. According to the motor heat dissipation cooling device, the main heating body of the motor is the stator, the heat exchangers are installed at the two ends of the motor stator, heat of the motor stator can be fully transmitted and discharged, and the heat dissipation effect of the motor is guaranteed. The heat exchanger adopts cooling liquid for heat exchange, the heat dissipation efficiency is higher than that of air cooling, and the heat exchange capacity of the heat exchanger can be improved. Moreover, the heat exchanger is of a flat structure, the heat exchange area is large, and the heat exchange efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of motor heat dissipation, in particular to a motor heat dissipation cooling device. Background Art

[0002] With the development of technology, new energy vehicles and motorcycles have put forward higher requirements on the performance indicators of motors such as efficiency, power density, response speed, vibration and noise, which promotes the development of motors towards high precision, high power density, miniaturization, lightweight and mechatronics. As a result, the internal heat of the motor increases sharply and the effective heat dissipation space is seriously insufficient. The heat dissipation problem has become a bottleneck for the further development of the motor system towards high power density.

[0003] Excessive internal temperature rise of the motor will not only reduce the life of the insulation material inside the motor, but also reduce the operating efficiency of the motor, increase the heat generation, and cause the motor temperature to rise further, forming a vicious cycle, seriously affecting the motor life and the safety of motor operation. According to statistics, about 30% to 40% of permanent magnet motor failures are caused by excessive motor temperature rise. Therefore, using an efficient heat dissipation system to suppress the motor temperature rise is the key to the development of motors towards high efficiency, high stability and high reliability.

[0004] At present, external air cooling is generally used for the heat dissipation of motors. The air cooling system has been widely used in the field of low-power motor heat dissipation due to its advantages of low cost, high reliability and easy installation. However, air cooling has low heat dissipation efficiency and large size, which is not suitable for the needs of vehicle development, and the heat dissipation effect of thermal conductive vehicle motors is not good. Utility Model Content

[0005] Based on this, it is necessary to provide a motor heat dissipation cooling device to address the problem that the existing motor heat dissipation uses external air cooling but the heat dissipation effect is poor.

[0006] A motor heat dissipation cooling device comprises a motor stator and a heat exchanger arranged at both ends of the motor stator, wherein the heat exchanger comprises:

[0007] A bottom plate is arranged to fit the end surface of the motor stator, and the bottom plate is provided with a mounting hole for fixing to the end surface of the motor stator;

[0008] A cavity plate is mounted on the bottom plate, wherein the cavity plate and the bottom plate form a cooling cavity;

[0009] a liquid inlet pipe, mounted on the cavity plate and connected to the cooling cavity; and

[0010] A liquid outlet pipe is installed on the cavity plate and communicated with the cooling cavity. Cooling liquid enters the cooling cavity through the liquid inlet pipe and then flows out through the liquid outlet pipe.

[0011] In one embodiment, the bottom plate and the cavity plate are annular to form a central channel through which the motor shaft extends.

[0012] In one of the embodiments, the bottom plate is provided with a mounting notch penetrating the inner circle and the outer circle of the bottom plate, and the shape of the cavity plate matches the bottom plate.

[0013] In one embodiment, the liquid inlet pipe and the liquid outlet pipe are respectively arranged at two ends of the bottom plate.

[0014] In one of the embodiments, the cavity plate is provided with an avoidance gap for avoiding the mounting hole.

[0015] In one of the embodiments, the base plate is further provided with a positioning hole for positioning the base plate on the motor stator.

[0016] In one embodiment, the positioning hole is arranged outside the mounting hole, and the positioning hole and the mounting hole are located in the same radial direction.

[0017] In one embodiment, the mounting holes are provided in a plurality of pairs, the plurality of pairs of mounting holes are arranged at intervals along the circumferential direction, and the two mounting holes in a pair are located in the same radial direction.

[0018] In one embodiment, the cavity plate is connected to the bottom plate by welding, and the cavity plate and the bottom plate form a welding convex bump.

[0019] In one embodiment, the bottom plate and the cavity plate are aluminum alloy plates.

[0020] In the above motor heat dissipation cooling device, the main heat generating body of the motor is the stator. Heat exchangers are installed at both ends of the motor stator to fully transfer and discharge the heat of the motor stator, thereby ensuring the heat dissipation effect of the motor. The coolant enters the cooling cavity through the liquid inlet pipe and then flows out through the liquid outlet pipe. The heat exchanger uses coolant for heat exchange, which has high heat dissipation efficiency compared to air cooling, and can improve the heat exchange capacity of the heat exchanger. In addition, the heat exchanger has a flat structure, a large heat exchange area, and high heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation of the utility model, the following will briefly introduce the drawings required for use in the specific implementation. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0022] Figure 1 A schematic diagram of the structure of a motor heat dissipation cooling device in one embodiment;

[0023] Figure 2 for Figure 1 A top view of the heat exchanger;

[0024] Figure 3 for Figure 2 Front view of the heat exchanger shown.

[0025] Reference numerals:

[0026] 10-motor stator, 20-heat exchanger, 21-bottom plate, 211-mounting hole, 212-cooling cavity, 213-center channel, 214-mounting notch, 215-positioning hole, 22-cavity plate, 221-avoidance notch, 222-welding convex bump, 23-liquid inlet pipe, 24-liquid outlet pipe, 30-statator, 40-rotating shaft. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model is described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific implementation disclosed below.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0030] See also Figure 1 In one embodiment, a motor heat dissipation cooling device includes a motor stator 10 and a heat exchanger 20 disposed at both ends of the motor. For the motor, the main heat generating body of the motor is the motor stator 10. By installing the heat exchanger 20 at both ends of the motor stator 10, the heat of the motor stator 10 can be fully transferred and discharged to ensure the heat dissipation effect of the motor.

[0031] Please also read Figure 2 and Figure 3In one embodiment, the heat exchanger 20 includes a bottom plate 21, a cavity plate 22, a liquid inlet pipe 23, and a liquid outlet pipe 24. The bottom plate 21 is arranged to fit the end surface of the motor stator 10, and the bottom plate 21 is provided with a mounting hole 211 for fixing to the end surface of the motor stator 10. The cavity plate 22 is mounted on the bottom plate 21, and the cavity plate 22 and the bottom plate 21 form a cooling cavity 212.

[0032] On the basis of the above embodiment, further, the bottom plate 21 and the cavity plate 22 are annular, and the bottom plate 21 and the cavity plate 22 form a central channel 213 , the rotor 30 in the motor can be exposed through the central channel 213 , and the rotating shaft 40 can extend through the central channel 213 .

[0033] Further, the bottom plate 21 and the cavity plate 22 are incomplete rings, that is, the bottom plate 21 is provided with a mounting notch 214 that passes through the inner and outer circles of the bottom plate 21, and the shape of the cavity plate 22 matches the bottom plate 21. The mounting notch 214 can facilitate the installation and connection between the motor and other structures.

[0034] On the basis of the above embodiment, further, the number and position of the mounting holes 211 are adapted to the type of the motor. In one embodiment, the mounting holes 211 are provided in multiple pairs, and the multiple pairs of mounting holes 211 are arranged at intervals along the circumferential direction, and the two pairs of mounting holes 211 are located in the same radial direction. Specifically in this embodiment, the mounting holes 211 are provided in two pairs, and the two pairs of four mounting holes 211 are arranged unevenly on the bottom plate 21.

[0035] In one embodiment, the cavity plate 22 is provided with an avoidance notch 221 for avoiding the mounting hole 211. Through the avoidance notch 221, it is convenient to install fasteners such as screws in the mounting hole 211 to avoid interference between the screws and the cavity plate 22. The number of the avoidance notches 221 matches the number of the mounting holes 211, and each mounting hole 211 is correspondingly provided with an avoidance notch 221. In this embodiment, the number of the avoidance notches 221 is four.

[0036] In one embodiment, the bottom plate 21 is further provided with a positioning hole 215, and the positioning hole 215 is used to position the bottom plate 21 on the motor stator 10. For example, the motor stator 10 is provided with a boss, and when the bottom plate 21 is installed, the boss is inserted into the positioning hole 215 to achieve the positioning of the bottom plate 21, which facilitates the rapid installation of the heat exchanger 20.

[0037] Furthermore, the number of positioning holes 215 is the same as the number of mounting holes 211 , and a positioning hole 215 is provided on the outside of each mounting hole 211 . The positioning hole 215 and the mounting hole 211 are located in the same radial direction, so that fasteners such as screws can be quickly inserted into the heat exchanger 20 through the mounting hole 211 .

[0038] In one embodiment, the cavity plate 22 is welded to the bottom plate 21, and the cavity plate 22 and the bottom plate 21 are welded to form a welding convex bump 222. The welding convex bump 222 can ensure the welding strength between the cavity plate 22 and the bottom plate 21, and on the other hand, since the welding convex bump 222 extends into the cooling cavity 212, the welding convex bump 222 can distribute the flow direction and flow rate of the coolant.

[0039] The liquid inlet pipe 23 is installed on the cavity plate 22, and the liquid inlet pipe 23 is connected to the cooling cavity 212. The liquid outlet pipe 24 is installed on the cavity plate 22, and the liquid outlet pipe 24 is connected to the cooling cavity 212. Among them, the external water pump can drive the coolant to enter the cooling cavity 212 through the liquid inlet pipe 23, and the coolant will flow out from the liquid outlet pipe 24 after heat exchange in the cooling cavity 212, so as to achieve heat dissipation of the motor stator 10.

[0040] In one embodiment, the liquid inlet pipe 23 and the liquid outlet pipe 24 are respectively arranged at both ends of the bottom plate 21, so that the distance between the liquid inlet pipe 23 and the liquid outlet pipe 24 is as long as possible, so as to improve the heat exchange performance of the heat exchanger 20. In one embodiment, the bottom plate 21 and the cavity plate 22 are aluminum alloy plates, which are light and have high strength and low material cost, and can reduce the cost of the heat exchanger 20. The coolant can be water, and the coolant can also be other liquids that can absorb heat, such as cooling oil.

[0041] In the above-mentioned motor heat dissipation cooling device, the main heat generating body of the motor is the motor stator 10. Heat exchangers 20 are installed at both ends of the motor stator 10, which can fully transfer and discharge the heat of the motor stator 10 to ensure the heat dissipation effect of the motor. The coolant enters the cooling cavity 212 through the liquid inlet pipe 23, and then flows out through the liquid outlet pipe 24. The heat exchanger 20 uses coolant heat exchange, which has high heat dissipation efficiency relative to air cooling, and can improve the heat exchange capacity of the heat exchanger 20. The heat exchanger 20 is installed in close contact with the motor stator 10. The heat exchanger 20 is a flat structure with a large heat exchange area, a reasonable internal flow state, and a high heat exchange efficiency. It is welded with aluminum alloy plates, which uses less material and has low material cost.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A motor heat dissipation cooling device, characterized in that: The invention comprises a motor stator and a heat exchanger arranged at two ends of the motor stator, wherein the heat exchanger comprises: A bottom plate is arranged to fit the end surface of the motor stator, and the bottom plate is provided with a mounting hole for fixing to the end surface of the motor stator; A cavity plate is mounted on the bottom plate, wherein the cavity plate and the bottom plate form a cooling cavity; a liquid inlet pipe, mounted on the cavity plate and connected to the cooling cavity; and A liquid outlet pipe is installed on the cavity plate and communicated with the cooling cavity. Cooling liquid enters the cooling cavity through the liquid inlet pipe and then flows out through the liquid outlet pipe.

2. The motor heat dissipation cooling device according to claim 1, characterized in that: The bottom plate and the cavity plate are annular to form a central channel through which the rotating shaft of the power supply motor extends.

3. The motor heat dissipation cooling device according to claim 2, characterized in that: The bottom plate is provided with a mounting notch penetrating the inner circle and the outer circle of the bottom plate, and the shape of the cavity plate matches the bottom plate.

4. The motor heat dissipation cooling device according to claim 1, characterized in that: The liquid inlet pipe and the liquid outlet pipe are respectively arranged at two ends of the bottom plate.

5. The motor heat dissipation cooling device according to claim 1, characterized in that: The cavity plate is provided with an avoidance notch for avoiding the mounting hole.

6. The motor heat dissipation cooling device according to claim 1, characterized in that: The bottom plate is also provided with a positioning hole for positioning the bottom plate on the motor stator.

7. The motor heat dissipation cooling device according to claim 6, characterized in that: The positioning hole is arranged outside the mounting hole, and the positioning hole and the mounting hole are located in the same radial direction.

8. The motor heat dissipation cooling device according to claim 1, characterized in that: The mounting holes are provided in a plurality of pairs, and the plurality of pairs of mounting holes are arranged at intervals along the circumferential direction, and the two mounting holes in a pair are located in the same radial direction.

9. The motor heat dissipation cooling device according to claim 1, characterized in that: The cavity plate is connected to the bottom plate by welding, and the cavity plate and the bottom plate form a welding convex bump.

10. The motor heat dissipation cooling device according to any one of claims 1 to 9, characterized in that: The bottom plate and the cavity plate are aluminum alloy plates.

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