Hub motor cooling structure capable of dynamically regulating and controlling water path

Abstract

The utility model is suitable for the technical field of hub motors, and provides a hub motor cooling structure capable of dynamically regulating and controlling a water path, which comprises a stator, a rotor, a winding, a permanent magnet, a water cooling pipeline, an auxiliary water pipe, a V-shaped heat conduction structure and a rotating shaft, wherein the rotor and the stator are coaxial, the rotating shaft is installed at the center of the stator, the winding is installed on the stator in an annular mode, and the permanent magnets are arranged between the rotor and the stator in the circumferential direction; the water cooling pipelines are installed in the rotating shaft, the two water cooling pipelines are symmetrically arranged in the rotating shaft along the geometric center of the rotating shaft, and water channel inlets are formed in the two ends of each water cooling pipeline. And the V-shaped heat conduction structure is annularly arranged at the end part of the stator. According to the structure, the highest-temperature part of the motor is cooled at a fixed point, and the V-shaped heat conduction structure is additionally arranged at the insufficient-cooling position, so that heat is dissipated in a conduction mode, the power density of the motor can be greatly improved, and energy loss in the traditional cooling process is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of hub motors, and in particular relates to a hub motor cooling structure for dynamically regulating a water channel. Background Art

[0002] The wheel hub motor is a motor technology that integrates power, transmission and braking devices in the wheel hub, also known as wheel motor technology. Traditional wheel hub motors are integrated in the wheel rim, so the heat dissipation is poor, which leads to an increase in motor temperature, especially the motor windings. Long-term high-temperature operation causes the windings to overheat and burn.

[0003] The common cooling method at present is to accelerate the heat exchange by controlling the cooling flow rate. This method cannot fully complete the heat exchange, cannot achieve a good cooling effect and will also cause energy loss. Utility Model Content

[0004] The purpose of the embodiments of the present utility model is to provide a hub motor cooling structure with dynamically controlled water channels, aiming to solve the problems raised in the above-mentioned background technology.

[0005] The embodiment of the utility model is implemented as follows: a hub motor cooling structure with dynamically controlled water circuits, comprising a stator, a rotor, a winding, a permanent magnet, a water cooling pipe, an auxiliary water pipe, a V-shaped heat conducting structure and a rotating shaft; wherein:

[0006] The rotor is coaxial with the stator, the rotating shaft is installed at the center of the stator, the winding is installed on the stator in an annular array, and the permanent magnet is circumferentially arranged between the rotor and the stator;

[0007] The water cooling pipe is installed in the rotating shaft, and two water cooling pipes are symmetrically arranged inside the rotating shaft along its geometric center. The water cooling pipe extends from the rotating shaft and bends toward the winding at the end for fixed point direct cooling, and water channel inlets are arranged at both ends of the water cooling pipe;

[0008] The V-shaped heat-conducting structure is arranged in a ring at the end of the stator.

[0009] According to a further technical solution, the two water-cooling pipes are connected to each other via a detachable auxiliary water pipe.

[0010] According to a further technical solution, the permanent magnet is equally divided into four parts along the axial direction.

[0011] According to a further technical solution, the inward angle of the V-shaped opening in the V-shaped heat-conducting structure is 120°.

[0012] The embodiment of the utility model provides a hub motor cooling structure with a dynamically controlled water channel, which provides a water channel structure for directly cooling the end windings to achieve fixed-point cooling of the part with the highest temperature of the motor. At the same time, by adding a V-shaped heat-conducting structure to the position where cooling is insufficient, the heat is dissipated by conduction, which can greatly improve the power density and motor performance of the motor and reduce the energy loss in the traditional cooling process. In addition, by dividing the permanent magnet into blocks, the permanent magnet eddy current loss can be greatly reduced, thereby increasing the efficiency of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of a cooling structure for a hub motor with a dynamically controlled water path provided by an embodiment of the utility model;

[0014] Figure 2 A schematic diagram of the structure of a cooling water channel in a hub motor cooling structure with a dynamically controlled water channel provided by an embodiment of the utility model;

[0015] Figure 3 A schematic diagram of a section of a permanent magnet in a hub motor cooling structure for dynamically controlling a water path provided in an embodiment of the utility model.

[0016] In the attached figure: 1. stator; 2. rotor; 3. winding; 4. permanent magnet; 5. cooling water channel; 6. water channel inlet; 7. auxiliary water channel; 8. V-shaped heat conduction structure; 9. rotating shaft. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0018] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0019] like Figure 1 As shown, a hub motor cooling structure for dynamically regulating water circuits provided by an embodiment of the utility model includes a stator 1, a rotor 2, a winding 3, a permanent magnet 4, a water cooling pipe 5, an auxiliary water pipe 7, a V-shaped heat conducting structure 8 and a rotating shaft 9; wherein:

[0020] The rotor 2 is coaxial with the stator 1, the rotating shaft 9 is installed at the center of the stator 2, the winding 3 is installed on the stator 1 in an annular manner, and the permanent magnet 4 is circumferentially arranged between the rotor 2 and the stator 1;

[0021] The water cooling pipe 5 is installed in the rotating shaft 9, and two water cooling pipes 5 are symmetrically arranged inside the rotating shaft 9 along its geometric center. The water cooling pipe 5 extends from the rotating shaft 9 and bends toward the winding 3 at the end for fixed point direct cooling, and water channel inlets 6 are arranged at both ends of the water cooling pipe 5;

[0022] The V-shaped heat-conducting structure 8 is arranged in a ring at the end of the stator 1 .

[0023] In the embodiment of the utility model, a water cooling pipe 5 is laid on the rotating shaft 9, and cooling water can be transported into the water cooling pipe 5 through the water channel inlet 6 to directly cool the stator 1 and winding 3 of the hub motor. The V-shaped heat conducting structure 8 is laid on the end of the stator 1 to conduct the heat that is not fully cooled. This structure can greatly reduce the temperature inside the motor, maintain the efficient operation of the motor, avoid the demagnetization of the permanent magnet and the burning of the winding insulation due to excessive temperature, and can greatly increase the service life of the motor.

[0024] like Figure 2 As shown, as a preferred embodiment of the utility model, the two water-cooling pipes 5 are interconnected by a detachable auxiliary water pipe 7, thereby changing the water flow cooling path and solving the problem of insufficient heat exchange originally caused by only changing the cooling water flow rate. Specifically, when the hub motor needs to allow high torque for a long time, the two water channel inlets 6 on the same side are used as water inlets, and the two water channel inlets 6 on the opposite side are used as water outlets. When running at low torque, one side of the two water-cooling pipes 5 is connected by the auxiliary water pipe 7, and the two water channel inlets 6 on the other side are used as water inlets and outlets respectively. The variable cooling structure can achieve sufficient cooling of the stator 1 and the winding 3, reduce energy loss during the cooling process, and greatly improve the efficiency of the motor and controller.

[0025] like Figure 3 As shown in FIG. 1 , as a preferred embodiment of the present invention, the permanent magnet 4 is evenly divided into four equal parts along the axial direction. By dividing the permanent magnet 4 into sections, the permanent magnet eddy current loss can be greatly reduced, the motor efficiency can be increased, and the heat generated by the motor can be reduced.

[0026] As a preferred embodiment of the present utility model, the inward angle of the V-shaped opening of the V-shaped heat-conducting structure 8 is 120°.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hub motor cooling structure with dynamically controlled water channels, comprising a stator, a rotor, a winding, and a permanent magnet, characterized in that: It also includes a water cooling pipe, an auxiliary water pipe, a V-shaped heat conducting structure and a rotating shaft; wherein: The rotor is coaxial with the stator, the rotating shaft is installed at the center of the stator, the winding is installed on the stator in an annular array, and the permanent magnet is circumferentially arranged between the rotor and the stator; The water cooling pipe is installed in the rotating shaft, and two water cooling pipes are symmetrically arranged inside the rotating shaft along its geometric center. The water cooling pipes extend from the rotating shaft and bend toward the winding at the end, and water channel inlets are arranged at both ends of the water cooling pipes; The V-shaped heat-conducting structure is arranged in a ring at the end of the stator.

2. The hub motor cooling structure with dynamically controlled water channels according to claim 1, characterized in that: The two water-cooling pipes are connected to each other via a detachable auxiliary water pipe.

3. The hub motor cooling structure with dynamically controlled water channels according to claim 1, characterized in that: The permanent magnet is equally divided into four equal parts along the axial direction.

4. The hub motor cooling structure with dynamically controlled water channels according to claim 1, characterized in that: The inward angle of the V-shaped opening in the V-shaped heat conducting structure is 120°.

Images