A liquid-cooled motor housing

Abstract

This utility model belongs to the field of motor technology, specifically a liquid-cooled motor housing. From front to back, it consists of a front cover, a side cover, and a rear cover. The side cover has a spiral cooling channel. The front and rear parts of the side cover have inlets and outlets connecting to the cooling channel, respectively, which are connected to an external water pump. The rear cover has a cavity that connects the front and rear sides for mounting fan blades. The outer surface of the side cover has multiple heat dissipation fins arranged axially along the side cover. A slit-structured air outlet is formed between the edge of the front face of the cavity and the edge of the side cover. An air inlet is formed on the rear face of the cavity, and a protective mesh is provided at the air inlet. When the motor is running, the fan blades rotate, allowing for rapid airflow and accelerating airflow between the heat dissipation fins, thereby enhancing heat dissipation.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, specifically a liquid-cooled motor housing. Background Technology

[0002] As a core power device that converts electrical energy into mechanical energy, the electric motor has become an indispensable key piece of equipment in many industrial fields and technological products. It generates a rotating magnetic field through the stator windings, driving the rotor to produce magnetoelectric rotational torque. However, during this energy conversion process, the windings generate a large amount of heat due to the current flowing through them, causing the motor temperature to rise.

[0003] Excessive motor temperature rise can directly affect its operational reliability, efficiency, and service life, and may even cause problems such as aging of insulation materials and demagnetization of magnets. Therefore, heat dissipation and cooling performance limits the power of the motor.

[0004] Currently, common natural cooling or single liquid cooling methods have bottlenecks in practical applications, such as limited heat dissipation capacity and poor temperature uniformity, making it difficult to meet the growing heat dissipation needs of high-power, miniaturized motors.

[0005] Therefore, there is an urgent need for a liquid-cooled motor housing structure with higher heat dissipation efficiency and better thermal management performance to effectively control the motor temperature rise and ensure its stable operation under high load conditions. Utility Model Content

[0006] Based on this, this solution provides a liquid-cooled motor housing that can provide liquid cooling for the motor. The coolant, after absorbing heat, can dissipate heat outward through the heat dissipation fins. Furthermore, when the motor is running, the rear fan blades rotate synchronously, which can accelerate the air circulation around the motor and improve the heat dissipation effect.

[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0008] A liquid-cooled motor housing comprises a front cover, a side cover, and a rear cover, arranged from front to back. The side cover has a spiral cooling channel inside. The front and rear parts of the side cover are respectively provided with an inlet and an outlet that communicate with the cooling channel. The inlet and the outlet are connected to an external water pump. The rear cover has a cavity that communicates with the front and rear for mounting fan blades. The outer surface of the side cover is provided with multiple heat dissipation fins arranged along the axial direction of the side cover.

[0009] Optionally, in one embodiment of the present invention, the cross-section of the cooling channel is a flat rectangle, so that the cooling medium in the channel can absorb and dissipate heat more quickly.

[0010] Optionally, in one embodiment of the present invention, an air outlet with a slit structure is provided between the edge of the front end face of the cavity and the edge of the side shell, and an air inlet is provided on the rear end face of the cavity, with a protective net provided at the air inlet position.

[0011] Optionally, in one embodiment of the present invention, the front and rear ends of the side shell are respectively provided with a front end cover and a rear end cover.

[0012] Optionally, in one embodiment of the present invention, the rear end of the side shell and the outer edge of the rear end cover are provided with a rear connection hole in the diagonal direction for fixing the side shell and the rear end cover.

[0013] Optionally, in one embodiment of the present invention, the front end of the side shell and the inner edge of the front cover and the front cover are provided with a front connecting hole in the diagonal direction for fixing the side shell and the front cover.

[0014] Optionally, in one embodiment of the present invention, the rear end cover has a shaft hole at its center for mounting the rear shaft of the motor.

[0015] Optionally, in one embodiment of the present invention, a sealing structure is provided between the end cap and the side shell, the sealing structure including an assembly groove and a sealing ring formed at the edge of the end cap and the edge of the side shell.

[0016] Compared with the prior art, the liquid-cooled motor housing provided by this utility model has the following characteristics:

[0017] The spiral cooling channel provides heat dissipation for the motor through liquid cooling. Combined with the outer shell with heat dissipation fins, it achieves heat dissipation through both heat absorption and efficient heat conduction by the coolant. The rear shaft of the motor can directly drive the fan blades to form a cooling airflow, improving the heat dissipation of the fins. The connection between the side shell and the end caps at both ends is sealed with labyrinth-shaped grooves and fluororubber sealing rings, which can ensure use in harsh environments and prevent leakage. The overall structure combines heat dissipation, lightweight design, and reduced manufacturing costs to meet the needs of motors requiring stronger heat dissipation capabilities. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a front view schematic diagram of the overall structure of Embodiment 1 of this utility model;

[0020] Figure 2 This is a rear view schematic diagram of the overall structure of Embodiment 1 of this utility model;

[0021] Figure 3 This is a cross-sectional structural diagram of Embodiment 1 of the present invention;

[0022] Reference numerals: front cover 1, front connecting hole 101, side shell 2, heat dissipation fins 201, connecting box 202, base 203, mounting hole 2031, cooling channel 204, rear cover 3, air inlet 301, air outlet 302, connecting part 303, cavity 304, front end cover 4, water inlet 401, rear end cover 5, water outlet 501, vent hole 502. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other. The technical solutions of the present invention will be further described below with reference to the accompanying drawings of the embodiments. The present invention is not limited to the specific embodiments described below.

[0024] It should be understood that the same or similar reference numerals in the accompanying drawings of the embodiments correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "front," "rear," "left," "right," "top," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0025] Example 1

[0026] Because existing motors are inadequate in heat dissipation and cooling, affecting their operation, reliability, and lifespan, a motor housing with enhanced heat dissipation and cooling capabilities was designed. The specific solution is as follows:

[0027] like Figure 1-3 As shown, a liquid-cooled motor housing consists of a front cover 1, a side cover 2, and a rear cover 3, arranged from front to back. The side cover 2 has a spiral cooling channel 204 inside. The front and rear parts of the side cover 2 are respectively provided with an inlet 401 and an outlet 501 that connect to the cooling channel 204. The inlet 401 and the outlet 501 are connected to an external water pump. The rear cover 3 has a cavity 304 that connects the front and rear for installing fan blades. The outer surface of the side cover 2 is provided with a plurality of heat dissipation fins 201 arranged along the axial direction of the side cover 2.

[0028] At the bottom of the side shell 2, there is a mounting base 203 that is integrally connected to the side shell 2. The mounting base 203 has mounting parts extending to both sides. Mounting holes 2031 are provided on the mounting parts for fixing the motor. At the top of the side shell 2, there is a connecting box 202 for electrical connection.

[0029] Side shell 2 includes an outer shell and an inner shell. Cooling channel 204 is located between the outer shell and the inner shell. The outer shell functions as a finned heat sink, and the inner shell is installed inside the outer shell, coaxially with the outer shell.

[0030] The cooling channel 204 has a flat rectangular cross-section, which allows the cooling medium inside the channel to absorb and dissipate heat more quickly. When the coolant flows inside, it flows along the flat channel, resulting in a relatively small volume of liquid and increasing the contact area between the cooling channel 204 and the inner shell. This makes it easier to remove heat from inside the motor and conduct it to the heat dissipation fins 201. The heat dissipation fins 201 and the outer shell are made of an integrated aluminum alloy casting. The inner shell is also made of aluminum alloy casting to ensure good thermal conductivity and relatively light weight.

[0031] An air outlet 302 with a slit structure is provided between the edge of the front end face of the cavity 304 and the edge of the side shell 2. An air inlet 301 is provided on the rear end face of the cavity 304. A protective net is provided at the air inlet 301. When the fan blades rotate, cold air is introduced from behind the motor. Then, through the action of the fan blades, the cold air is blown out from the air outlet 302 that is attached to the outer wall of the side shell 2. After the cold air is blown out from the air outlet 302, it flows along the direction of the heat dissipation fins 201, which accelerates the air flow around the heat dissipation fins 201 and makes the heat dissipation effect of the heat dissipation fins 201 better.

[0032] The rear end of the side shell 2 and the outer edge of the rear end cover 5 are provided with a rear connection hole in the diagonal direction for the fixed connection between the side shell 2 and the rear cover 3. Screws are installed in the rear connection hole to fix the rear cover 3 and the side shell 2. The outer edge of the rear end cover 5 and the outer edge of the rear cover 3 are provided with a connection part 303 in the diagonal direction. The connection part 303 is provided with a screw hole for the fixed connection between the two.

[0033] The front end of the side shell 2 and the inner edge of the front cover 1 and the front cover 4 are provided with front connecting holes 101 in the diagonal direction. The front connecting holes 101 of the three are on the same axis and are used for fixed connection between the side shell 2 and the front cover 1 and the front cover 4.

[0034] The front connecting hole 101 and the rear connecting hole are provided with four holes to ensure that the side shell 2 is stably connected to the front cover 1 and the rear cover 3 in all directions. The diameter of the front cover 1 is the same as the diameter of the side shell 2, so it will not obstruct the airflow.

[0035] The rear cover 5 has a shaft hole in the center for installing the rear shaft of the motor. In this embodiment, the motor adopts a dual-shaft design, with the rear shaft used to install the fan blades. When the motor is running, the fan blades run synchronously, and the speed of the fan blades changes with the operation of the motor.

[0036] The front and rear ends of the side shell 2 are provided with end caps, namely the front end cap 4 and the rear end cap 5. The end caps are used to seal the cooling channel 204 and to install the inlet 401 and the outlet 501. Before the rear end cap 3 and the front end cap 1 are assembled, the rear end cap 5 is fixed to the side shell 2 first, and then the rear end cap 3 and the rear end cap 5 are fixedly connected. The front end cap 4 and the front end cap 1 are installed at the front end of the side shell 2 at the same time.

[0037] The rear cover 502 has downward-sloping vent holes. When the fan blades rotate, a negative pressure can be formed behind the fan blades, and the hot air inside can be drawn out through the vent holes to achieve the function of auxiliary heat dissipation for the motor.

[0038] A sealing structure is provided between the end cap and the side shell 2. The sealing structure includes an assembly groove and a sealing ring opened on the edge of the end cap and the edge of the side shell 2. The assembly groove is a labyrinth structure to ensure the sealing effect and prevent leakage. The sealing ring is made of fluororubber to meet the requirements of high-temperature working environment.

[0039] The motor housing in this design combines liquid cooling as the main heat dissipation with air cooling as the auxiliary heat dissipation, giving the motor a highly efficient heat dissipation system.

[0040] The spiral-shaped flat rectangular cooling channel 204 design increases the contact area with the housing. The coolant volume in the channel is small and the flow rate is fast, which can quickly absorb and carry away the huge heat generated by the motor, avoiding internal heat accumulation.

[0041] The motor itself drives the fan blades via its rear shaft, requiring no additional power and generating cooling airflow that matches the motor speed. When the motor is under high load, the main shaft speed is high, and the fan airflow automatically increases, resulting in stronger heat dissipation. When the motor is under low load, the fan speed decreases, reducing unnecessary losses and noise.

[0042] The cooling airflow is guided by the cavity 304 and blows towards the heat dissipation fins 201. By accelerating the airflow, the heat of the heat dissipation fins 201 is carried away. The heat dissipation fins 201 can further conduct the heat of the coolant, thereby improving the heat exchange efficiency between the heat dissipation fins 201 and the air.

[0043] The end cap and side shell 2 are sealed with a labyrinth structure assembly groove and a fluororubber sealing ring to prevent coolant leakage, making it suitable for harsh working environments.

[0044] The structural design of the motor housing itself remains largely unchanged, and it can be manufactured using existing production conditions without the need for manufacturing preparation from scratch.

[0045] Example 2

[0046] In this embodiment, the structure of the motor housing is basically the same as that in Embodiment 1. The difference is that the inlet 401 and the outlet 501 are located at the front and rear ends of the bottom of the side housing 2, which facilitates the drainage of the coolant in the cooling channel 204. Draining the coolant can avoid the problems caused by the internal coolant residue. In addition, the length of the cooling channel 204 can be extended to cover the end caps at the front and rear ends of the side housing 2, so as to remove the heat from the end caps.

[0047] Example 3

[0048] In this embodiment, the structure of the motor housing is basically the same as that in embodiment 1. The difference is that, during manufacturing, the cooling channel 204 is manufactured as a separate component. After the various structural components of the motor housing are manufactured, they can be assembled.

[0049] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A liquid-cooled motor housing, characterized by, Front cover, side shell and rear cover from front to back, the side shell is equipped with spiral cooling flow channel, the front and rear of the side shell is equipped with water inlet and water outlet respectively, the water inlet and the water outlet are connected with the external water pump, the rear cover is equipped with cavity for installing fan blade, the outer surface of the side shell is equipped with multiple heat dissipation fins arranged along the axial direction of the side shell, the edge between the front end face of the cavity and the side shell edge is provided with gap structure air outlet, the rear end face of the cavity is provided with air inlet, and the air inlet is provided with protective net.

2. A liquid-cooled motor housing according to claim 1, characterized in that: The cross section of the cooling flow channel is flat rectangular, so that the cooling medium in the flow channel can absorb and dissipate heat faster.

3. A liquid-cooled motor housing according to claim 1, characterized in that: The front and rear ends of the side shell are respectively provided with front end cover and rear end cover.

4. A liquid-cooled motor housing according to claim 1, characterized in that: The rear end of the side shell and the edge outside of the rear end cover are provided with rear connecting hole in diagonal direction, which is used for fixed connection of the side shell and the rear end cover.

5. A liquid-cooled motor housing according to claim 1, characterized in that: The front end of the side shell and the edge inside of the front cover and the front end cover are provided with front connecting hole in diagonal direction, which is used for fixed connection of the side shell and the front cover.

6. A liquid-cooled motor housing according to claim 4, characterized in that: The rear end cover is provided with shaft hole in the center, which is used for installing motor rear shaft.

7. A liquid-cooled motor housing according to claim 6, characterized in that: The end cover and the side shell are provided with sealing structure, and the sealing structure includes assembly groove and sealing ring arranged on the edge of the end cover and the edge of the side shell.

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