A self-driven high-speed motor liquid cooling system based on rotating heat pipe

Abstract

The invention discloses a self-driven high-speed motor liquid cooling heat dissipation system based on a rotating heat pipe, comprising a motor, a rotating heat pipe, a fin-impeller device and a liquid cooling circuit; the rotating heat pipe comprises an evaporation section and a condensation section; the fin-impeller device is an impeller-type heat dissipation fin; the liquid cooling circuit comprises parallel flow channels embedded in the stator of the high-speed motor, a radiator and a connecting pipeline; the evaporation section of the rotating heat pipe extends into and is fixed inside the middle shaft of the high-speed motor rotor to dissipate the heat of the rotor, a fin-impeller device is arranged outside the condensation section to rotate with the motor rotor to self-drive the cooling fluid of the liquid cooling circuit, the liquid cooling fluid flows through the parallel flow channels embedded in the stator to dissipate the heat of the stator, and then flows through the liquid cooling fluid cavity to cool the rotating heat pipe condensation section; the invention utilizes the phase change of the heat pipe and the liquid cooling circuit to dissipate the heat of the motor rotor and the stator at the same time, has high heat dissipation efficiency, can adaptively adjust the heat dissipation according to the heat generation of the high-speed motor, does not require a power device, and is simple to control.

Description

Technical Field

[0001] The present invention relates to the field of thermal management of electronic equipment, and in particular to a self-driven high-speed motor liquid cooling and heat dissipation system based on a rotating heat pipe, which is suitable for heat dissipation of high-speed motors. Background Art

[0002] High-speed motors have the advantages of small size, light weight, high power density, and fast dynamic response, and are widely used in the field of high-speed drive equipment. Compared with normal-speed motors, high-speed motors have high frequency characteristics, and the stator will produce more eddy current loss and core loss; at the same time, the power density is improved, and the corresponding loss density also increases; in addition, as the motor speed increases, the rotor and the air gap rub at high speed, and the friction loss generated on the rotor surface is much greater than that of normal-speed motors, which will bring great difficulties to the heat dissipation of the rotor. Difficulties in rotor heat dissipation will cause the motor temperature to rise, and permanent magnets are prone to irreversible demagnetization at high temperatures, and the mechanical properties will also decline; at this stage, the traditional single air cooling and water cooling methods cannot meet the heat dissipation requirements of high-speed motors. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a self-driven high-speed motor liquid cooling heat dissipation system based on a rotating heat pipe. A rotating heat pipe fixed inside the central axis of the high-speed rotor is used to dissipate heat from the high-speed motor rotor; the liquid cooling fluid flows through the parallel flow channels embedded inside the motor stator to dissipate heat from the high-speed motor stator in a liquid cooling manner; a fin-impeller device is arranged at the condensation section of the rotating heat pipe, which not only strengthens the heat dissipation effect of the condensation section of the rotating heat pipe to the liquid cooling fluid, but also can self-drive the liquid cooling circuit liquid cooling fluid circulation as the motor rotor rotates.

[0004] In order to achieve the above-mentioned purpose, the technical solution provided by the present invention is: a self-driven high-speed motor liquid cooling and heat dissipation system based on a rotating heat pipe, comprising: a motor, a rotating heat pipe is arranged at the central axis of the rotor of the motor, the rotating heat pipe comprises an evaporation section and a condensation section, the evaporation section is arranged inside the central axis of the rotor, the condensation section extends to the outside of the central axis of the rotor, and the interior of the rotating heat pipe is filled with a phase change working medium; a plurality of parallel flow channels are arranged in the stator of the motor along the axial direction, and the parallel flow channels are connected to a heat dissipation device through a connecting pipeline; a fin-impeller device is arranged on the outer surface of the condensation section, the fin-impeller device is arranged in a liquid-cooling fluid cavity, and the liquid-cooling fluid cavity is filled with liquid-cooling fluid, and the fin-impeller device is used to enhance the heat dissipation of the condensation section into the liquid-cooling fluid, and at the same time serves as a power source of the liquid-cooling fluid to drive the flow of the liquid-cooling fluid.

[0005] As a preferred technical solution, the rotating heat pipe is embedded in the central axis of the rotor.

[0006] As a preferred technical solution, the rotating heat pipe and the rotor are integrally formed.

[0007] As a preferred technical solution, the internal cavity of the rotating heat pipe is one of cylindrical, conical and stepped.

[0008] As a preferred technical solution, the liquid-cooling fluid cavity is a conical structure for reducing leakage losses.

[0009] As a preferred technical solution, the fin-impeller device is directly connected to the condensation section by welding, so as to reduce the contact thermal resistance during the heat transfer process and improve the mechanical strength.

[0010] As a preferred technical solution, the heat dissipation device is a radiator.

[0011] As a preferred technical solution, the heat dissipation device is connected to a liquid cooling system.

[0012] The beneficial effects of the present invention compared with the prior art are as follows: (1) the rotating heat pipe uses efficient phase change heat transfer to dissipate heat for the rotor, and the liquid cooling circuit dissipates heat for the stator through parallel flow channels, while taking out the condensation heat of the rotating heat pipe, with high heat dissipation efficiency and compact structure;

[0013] (2) The liquid cooling liquid flow is self-driven by the fin-impeller device fixed on the high-speed motor rotor and the rotating heat pipe condensing section. Therefore, the heat generated by the high-speed motor and the heat dissipation of the liquid cooling system can adapt to the speed to achieve a balance between heat generation and heat dissipation;

[0014] (3) The entire system does not require any other control equipment and is easy to control;

[0015] (4) No additional power drive device is required, saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural principle diagram of the present invention;

[0017] Figure 2 The structural principle diagrams of different forms of rotating heat pipes;

[0018] In the figure: 1 - motor; 11 - stator; 12 - rotor; 13 - liquid cooling fluid chamber; 14 - sealed housing; 2 - rotating heat pipe; 21 - evaporation section; 22 - condensation section; 3 - fin-impeller device; 4 - liquid cooling circuit; 41 - parallel flow channel; 42 - heat dissipation device; 43 - connecting pipeline. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "an" and / or "the" do not refer to the singular and may also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0021] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0022] Reference Figure 1 The present embodiment provides a self-driven high-speed motor liquid cooling and heat dissipation system based on a rotating heat pipe, including a motor 1, a stator 11, a rotor 12, a liquid cooling fluid cavity 13, a sealed housing 14, a rotating heat pipe 2, an evaporation section 21, a condensation section 22, a fin-impeller device 3, a liquid cooling circuit 4, parallel flow channels 41 embedded in the motor stator, a heat dissipation device 42 and a connecting pipeline 43.

[0023] Among them, a rotating heat pipe 2 is provided at the central axis of the rotor 12 of the motor 1. It should be noted that in the present embodiment, the rotating heat pipe 2 is embedded in the central axis of the rotor 12 in a detachable manner, but the protection scope of the present invention is not limited to this. Other methods such as the integrated molding of the rotating heat pipe 2 and the rotor 12 are also within the protection scope of the present invention. The rotating heat pipe 2 includes an evaporation section 21 and a condensation section 22. The evaporation section 21 is embedded in the central axis of the rotor 12, and the condensation section 22 extends to the outside of the central axis of the rotor 12. The interior of the rotating heat pipe 2 is filled with a phase change working fluid. It should be understood that the phase change working fluid is a conventional technical means in the field of heat dissipation, so it will not be described here. Figure 2 As shown, according to the rotation speed requirements, filling volume, processing difficulty, etc., the internal structure of the rotating heat pipe 2 can be set to one of cylindrical, conical, and stepped shapes.

[0024] Furthermore, a plurality of parallel flow channels 41 are provided in the stator 11 of the motor 1 along the axial direction, and the parallel flow channels 41 are connected to a heat dissipation device 42 via a connecting pipe 43. The heat dissipation device 42 can adopt independent heat dissipation or be connected to other forms of liquid cooling systems for heat dissipation. Independent heat dissipation means heat dissipation by a radiator, and the liquid cooling system can adopt existing liquid cooling systems on the market, so it will not be elaborated here.

[0025] Furthermore, a fin-impeller device 3 is provided on the outer surface of the condensing section 22, and the fin-impeller device 3 is provided in the liquid-cooling fluid cavity 13. The liquid-cooling fluid cavity 13 is composed of a sealed housing and the main structure of the motor 1. In this embodiment, the liquid-cooling fluid cavity 13 is a conical structure, which can reduce leakage losses. The liquid-cooling fluid cavity 13 is filled with liquid-cooling fluid, and the fin-impeller device 3 is used to strengthen the heat dissipation of the condensing section 22 into the liquid-cooling fluid, and at the same time, it acts as a power source of the liquid-cooling fluid to promote the flow of the liquid-cooling fluid. In this embodiment, the fin-impeller device 3 is directly connected to the condensing section 22 by welding, which can reduce the contact thermal resistance during the heat transfer process and improve the mechanical strength.

[0026] The self-driven high-speed motor liquid cooling heat dissipation system based on rotating heat pipes provided in this embodiment uses the huge centrifugal force generated by its high-speed rotation to dissipate heat from the rotor 12 by means of the rotating heat pipe 2; for the heat such as eddy current loss generated by the stator of the high-speed motor, liquid cooling is performed by arranging parallel flow channels 41 in the stator 11; the rotating heat pipe condensation section 22 is located in the liquid cooling fluid cavity 13 and is arranged with a fin-impeller device 3, which not only strengthens the heat dissipation of the condensation section 22 to the liquid cooling fluid, but also self-drives the liquid cooling fluid circulation flowing through the stator by means of the rotation of the rotor 12. The system has high heat dissipation efficiency, does not require power drive, is easy to control, and the heat dissipation and heat generation are adaptive to the rotation speed.

[0027] The above description is only an implementation mode of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A self-driven high-speed motor liquid cooling system based on a rotating heat pipe, characterized in that: include: A motor (1), wherein a rotating heat pipe (2) is arranged at the center axis of a rotor (12) of the motor (1), the rotating heat pipe (2) comprising an evaporation section (21) and a condensation section (22), the evaporation section (21) being arranged inside the center axis of the rotor (12), the condensation section (22) extending to the outside of the center axis of the rotor (12), and the interior of the rotating heat pipe (2) being filled with a phase-changing working medium; a plurality of parallel flow channels (41) are arranged in the stator (11) of the motor (1) along the axial direction, the parallel flow channels (41) being connected to a heat dissipation device (42) via a connecting pipe (43); the condensation section (22 ) is provided with a fin-impeller device (3) on its outer surface, the fin-impeller device (3) being arranged in a liquid-cooling fluid cavity (13), the liquid-cooling fluid cavity (13) being filled with liquid-cooling fluid, the fin-impeller device (3) being used to strengthen the heat dissipation from the condensing section (22) to the liquid-cooling fluid, and at the same time serving as a power source for the liquid-cooling fluid to drive the liquid-cooling fluid to flow; the fin-impeller device (3) is directly connected to the condensing section (22) by welding, and is used to reduce the contact thermal resistance during the heat transfer process, and at the same time improve the mechanical strength; the liquid-cooling liquid flow is self-driven by the fin-impeller device (3), and no additional power drive device is required.

2. The self-driven high-speed motor liquid cooling and heat dissipation system according to claim 1 is characterized in that: The rotating heat pipe (2) is embedded in the center axis of the rotor (12).

3. The self-driven high-speed motor liquid cooling and heat dissipation system according to claim 1 is characterized in that: The rotary heat pipe (2) and the rotor (12) are integrally formed.

4. The self-driven high-speed motor liquid cooling and heat dissipation system according to claim 1 is characterized in that: The internal cavity of the rotating heat pipe (2) is in the shape of a cylinder, a cone or a step.

5. The self-driven high-speed motor liquid cooling and heat dissipation system according to claim 1 is characterized in that: The liquid cooling fluid cavity (13) is a conical structure, which is used to reduce leakage loss.

6. The self-driven high-speed motor liquid cooling and heat dissipation system according to claim 1 is characterized in that: The heat dissipation device (42) is a radiator.

7. The self-driven high-speed motor liquid cooling and heat dissipation system according to claim 1 or 6, characterized in that: The heat dissipation device (42) is connected to a liquid cooling system.

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