Integrated casing for water-cooled electric machine

Abstract

The utility model relates to a kind of integrated machine shell for water-cooled motor, water inlet channel, water outlet channel and middle section water channel are all along the circumferential of machine shell inner sleeve and set on machine shell inner sleeve, the middle section water channel is communicated with water inlet channel and water outlet channel respectively, the water outlet channel is between water inlet channel and middle section water channel, the water inlet channel, water outlet channel and middle section water channel are annular water channel and same annular water channel is coplanar, the machine shell inner sleeve is welded in machine shell outer sleeve. Different types of annular water channel are set, along the circumferential spread machine shell inner sleeve, same annular water channel is in same plane, ensure that same water channel is in same temperature zone, different water channel is head-to-tail communication, and water outlet channel is set in middle, middle part heat is maximum, i. e. cooling water flows through two ends and then flows through middle water outlet, two end temperature is low while middle temperature is high, from low temperature to high temperature, avoid high temperature area reverse heating to low temperature area, improve heat dissipation efficiency.

Description

Technical Field

[0001] This utility model relates to an integrated housing for a water-cooled motor, and more particularly to an integrated housing for a water-cooled motor. Background Technology

[0002] As a core component of motor cooling systems, water-cooled integrated housings are widely used in new energy, industrial manufacturing, and electronic equipment. Their primary function is to achieve heat exchange through internal water-cooling channels, thus requiring extremely high standards for weld sealing, mechanical strength, and dimensional stability. Currently, new energy vehicle motors are developing towards higher power density and miniaturization, placing even higher demands on the integration, lightweighting, and heat dissipation performance of water-cooled integrated housings.

[0003] Currently, water-cooled integrated housings have the following problems: First, the split housing and end cover are connected by bolts, resulting in more parts and increased assembly steps; second, most current water-cooled integrated housings are made using low-pressure casting, which is inefficient and cannot meet the requirements of complex water channel designs; third, current welding mainly uses traditional fusion welding techniques, such as TIG welding (tungsten inert gas welding) and MIG welding (methane inert gas welding), which have problems such as many welding defects, large welding deformation, and insufficient mechanical properties, affecting the assembly accuracy and functional use of the motor. Friction stir welding, as a green welding technology, has advantages such as small thermal deformation, high weld density, and mechanical properties close to the base material; high pressure casting process has advantages such as high mass production efficiency, strong structural integration, and stable mechanical properties.

[0004] Utility model patent CN210273696U discloses a motor housing with a water channel structure, including: a water channel inner sleeve and a housing outer sleeve fitted outside the water channel inner sleeve. The outer surface of the water channel inner sleeve is provided with water channel partition ribs. Along the axial direction of the water channel inner sleeve, the spacing between adjacent water channel partition ribs is equal, and adjacent water channel partition ribs form a channel for the flow of cold water. A sealing ring is provided at the open end of the water channel inner sleeve. During assembly, the positional relationship between the water channel inner sleeve and the housing outer sleeve is fixed first, and then the sealing ring is installed. This patent uses a sealing ring for sealing, which has the problems of incomplete sealing and easy aging of the sealing ring. At the same time, the water channel in this patent is spiral-shaped, and the water channel is discharged only after passing through the entire temperature zone. This can easily lead to the cooling water absorbing heat in the high temperature zone first and then passing through the low temperature zone, causing the temperature of the low temperature zone to rise, thereby affecting heat dissipation.

[0005] Therefore, providing a high-efficiency heat dissipation casing that can avoid interference between different temperature ranges is an urgent problem to be solved. Utility Model Content

[0006] The purpose of this utility model is to overcome the defects of the existing technology and provide an integrated housing for a water-cooled motor.

[0007] The objective of this utility model can be achieved through the following technical solutions: According to one aspect of the present invention, an integrated housing for a water-cooled motor is provided, comprising an outer housing and an inner housing having an inlet channel, an outlet channel, and a middle channel. The inlet channel, outlet channel, and middle channel are all arranged around the circumference of the inner housing. The middle channel is connected to the inlet channel and the outlet channel respectively. The outlet channel is located between the inlet channel and the middle channel. The inlet channel, outlet channel, and middle channel are all annular channels and are coplanar. The inner housing is welded to the outer housing.

[0008] As a preferred technical solution, the inner sleeve of the casing includes a reinforcing rib and an annular water channel. The reinforcing rib is disposed in the annular water channel, and one end of the reinforcing rib is connected to the wall of the annular water channel. The reinforcing rib and the annular water channel form an inlet water channel, an outlet water channel, and a middle water channel.

[0009] As a preferred technical solution, the reinforcing rib is U-shaped and the reinforcing rib is interference-fitted with the outer casing.

[0010] As a preferred technical solution, the inner casing also includes fins for guiding and heat dissipation. The fins are disposed in the inlet water channel, the outlet water channel and the middle water channel, and the fins are interference-fitted with the outer casing.

[0011] As a preferred technical solution, the fins include guide fins and heat dissipation fins, and the guide fins are symmetrically arranged at the connection between the middle water channel and the inlet water channel and the outlet water channel.

[0012] As a preferred technical solution, the guide fins are arc-shaped.

[0013] As a preferred technical solution, the fins further include heat dissipation fins, which are installed in the middle water channel, the inlet water channel, and the outlet water channel.

[0014] As a preferred technical solution, the outer casing includes a water outlet and a water inlet, the water outlet being connected to a water outlet channel, and the water inlet being connected to a water inlet channel.

[0015] As a preferred technical solution, the housing also includes a motor end cover, which is integrated with the housing outer sleeve into a single unit.

[0016] As a preferred technical solution, friction stir welding is used to weld the inner casing to the outer casing.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model is equipped with different types of annular water channels, which are distributed circumferentially throughout the inner sleeve of the casing. The same annular water channel is on the same plane, ensuring that the same water channel is in the same temperature zone. Different water channels are connected end to end, and the water outlet is located in the middle. The middle part has the greatest heat, that is, the cooling water flows through the two ends and then flows through the middle outlet. The temperature at the two ends is low and the temperature in the middle is high. The water flows from the low temperature to the high temperature, avoiding the high temperature zone heating the low temperature zone in reverse, thus improving the heat dissipation efficiency.

[0018] 2. This utility model also includes fins for guiding and dissipating heat. The heat dissipation fins are installed in the water channels to improve heat dissipation efficiency, and the guide fins are installed at the connection between different water channels to guide the flow of cooling water and make it easier for it to flow to other water channels.

[0019] 3. In this utility model, the inner and outer casings are installed by welding, specifically by friction stir welding, which results in good density and ensures the airtightness between the inner and outer casings.

[0020] 4. This utility model integrates the outer casing and the motor end cover into a single unit, reducing the need for threaded fastening between the outer casing and the motor end cover and improving the alignment between them. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the outer casing structure of this utility model; Figure 3 This is a schematic diagram of the inner sleeve structure of the housing of this utility model; Figure 4 This is a cross-sectional structural diagram of the housing of this utility model; Figure 5 This is a schematic diagram of the waterway structure of this utility model; Figure 6 In this utility model Figure 5 A schematic diagram of the waterway structure on the back; 1. Outer casing; 2. Inner casing; 101. First weld; 102. Second weld; 103. Third weld; 104. Motor end cover; 105. Water outlet; 106. Water inlet; 201. Guide fins; 202. Heat dissipation fins; 203. Water inlet channel; 204. Water outlet channel; 205. Middle channel; 206. Reinforcing rib. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present utility model.

[0023] Example 1 like Figures 1-6 As shown, an integrated housing for a water-cooled motor includes an outer housing 1 and an inner housing 2 having an inlet water channel 203, an outlet water channel 204, and a middle water channel 205. The inlet water channel 203, the outlet water channel 204, and the middle water channel 205 are all arranged around the circumference of the inner housing 2. The middle water channel 205 is connected to the inlet water channel 203 and the outlet water channel 204 respectively. The outlet water channel 204 is located between the inlet water channel 203 and the middle water channel 205. The inlet water channel 203, the outlet water channel 204, and the middle water channel 205 are all annular water channels and are on the same plane. The inner housing 2 is welded to the outer housing 1.

[0024] In this embodiment, multiple annular water channels are provided on the surface of the inner casing 2 for heat dissipation. These channels are all arranged along the circumference of the inner casing 2, and the same annular water channel is located on the same surface. Figure 5 Waterway distribution projection Figure 6 The water channel boundaries remain consistent, and are set as three rings arranged sequentially along the axial direction. The multiple ring water channels are the middle section water channel 205, the inlet water channel 203, and the outlet water channel 204. The middle section water channel 205 is used to connect the inlet water channel 203 and the outlet water channel 204, and is set as an additional ring. The outlet water channel 204 is set in the middle of the middle section water channel 205 and the inlet water channel 203, that is, the middle section water channel 205 and the inlet water channel 203 are located at both ends of the inner sleeve 2 of the casing. The middle section water channel 205 is connected to the inlet water channel 203 and the outlet water channel 204 at their ends, that is, one end of the middle section water channel 205 is connected to the inlet water channel 203, and the other end of the middle section water channel 205 is connected to the outlet water channel 204, forming a flow channel for cooling water on the inner sleeve 2 of the casing.

[0025] The middle part of the inner casing 2 has the highest heat, which is the high-temperature zone, while the two ends have lower heat, which are the low-temperature zones. The middle water channel 205 and the outlet water channel 204 are set at both ends of the inner casing 2. The cooling water flows through the inlet water channel 203 and the middle water channel 204 in sequence, carrying away the heat from the low-temperature zone, and then flows through the outlet water channel 204 to carry away the heat from the high-temperature zone and discharge it. In this utility model, the cooling water flows from the low-temperature zone to the high-temperature zone as a whole, and the cooling water does not flow from the high-temperature zone to the low-temperature zone, so as to raise the temperature of the low-temperature zone and thus achieve efficient heat dissipation.

[0026] The inner sleeve 2 of the casing includes a reinforcing rib 206 and an annular water channel. The reinforcing rib 206 is disposed in the annular water channel, and one end of the reinforcing rib 206 is connected to the wall of the annular water channel. The reinforcing rib 206 and the annular water channel form an inlet water channel 203, an outlet water channel 204 and a middle section water channel 205.

[0027] The reinforcing rib 206 is U-shaped and is interference-fitted with the outer casing 1.

[0028] In this embodiment, an annular water channel and reinforcing ribs 206 are provided to form multiple annular water channels. The reinforcing ribs 206 are also arranged around the circumference of the inner sleeve 2 of the housing. The reinforcing ribs 206 are U-shaped; a single reinforcing rib can be bent into a U-shape, or multiple reinforcing ribs can be used to form a U-shape. The walls of the annular water channel and the U-shaped reinforcing ribs 206 together form the inlet water channel 203, the outlet water channel 204, and the middle water channel 205. The reinforcing ribs 206 are interference-fitted with the outer sleeve 1 of the housing, allowing cooling water to flow sequentially along the water channels. Only one end of the reinforcing rib 206 needs to form the inlet water channel 203 with the annular water channel.

[0029] The inner casing 2 also includes fins for guiding and heat dissipation. The fins are disposed in the water inlet channel 203, the water outlet channel 204 and the middle channel 205. The fins are interference-fitted with the outer casing 1.

[0030] The fins include guide fins 201 and heat dissipation fins 202. The guide fins 201 are symmetrically arranged at the connection between the middle water channel 205 and the inlet water channel 203 and the outlet water channel 204.

[0031] The guide fin 201 is arc-shaped.

[0032] The fins also include heat dissipation fins 202, which are installed in the middle water channel 205, the inlet water channel 203 and the outlet water channel 204.

[0033] In this embodiment, fins for guiding and dissipating heat are provided, and all fins are interference-fitted with the outer casing 1. The guide fins 201 are located at the junctions of the middle section water channel 205 and the inlet water channel 203, and at the junctions of the middle section water channel 205 and the outlet water channel 204. At these junctions, the cooling water needs to be redirected. To better guide the cooling water, guide fins 201 are symmetrically arranged at the junctions. The guide fins 201 are designed in an arc shape. Due to their symmetrical arrangement, the small arcs of the two guide fins 201 form a large arc to guide the cooling water flow. The length, arc, and spacing of the guide fins 201 are designed according to the length of the junction; for example, the length of the guide fins 201 can be set to 35mm, the height to 6mm, and the spacing to 5-8mm. The heat dissipation fins 202 are strip-shaped, and their length can be set to 50mm, their height to 6mm, and their spacing to 30mm.

[0034] Heat dissipation fins 202 are arranged in a certain pattern in the inlet channel 203, outlet channel 204, and middle channel 205 for heat dissipation. For example, two parallel heat dissipation fins 202 are arranged near the outlet or inlet of the middle channel 205 and outlet channel 204 when they connect. The same method can also be used near the connection between the middle channel 205 and inlet channel 203. In the middle area of ​​the inlet channel 203, outlet channel 204, and middle channel 205, two parallel heat dissipation fins 202 and a single heat dissipation fin 202 can be arranged periodically, with the gap between the single heat dissipation fin 202 and the two parallel heat dissipation fins 202 aligned.

[0035] The outer casing 1 includes a water outlet 105 and a water inlet 106. The water outlet 105 is connected to the water outlet channel 204, and the water inlet 106 is connected to the water inlet channel 203.

[0036] In this embodiment, an outlet 105 and an inlet 106 are provided for the discharge and entry of cooling water, respectively. Figure 5 and Figure 6 As shown, the cooling water flows as follows: cooling water enters from inlet 106. Figure 5 The water inlet channel 203 flows to Figure 6 The water inlet channel 203 in the middle, then by Figure 6 The water inlet channel 203 flows towards Figure 6 The middle section of the waterway 205 Figure 5 The middle section of the waterway 205, by Figure 5 The middle section of the waterway 205 flows towards Figure 5 Water outlet channel 204 Figure 6 The water outlet channel 204 in the middle is ultimately supplied by Figure 6The water is discharged from the outlet 105 above the water outlet channel 204. The water channels are distributed throughout the inner sleeve 2 of the casing, and the water channel design is uniform. At the same time, the cooling water channels are not in the same direction, which ensures heat dissipation and balances the flow resistance of the water channels.

[0037] The housing also includes a motor end cover 104, which is integrated with the housing outer sleeve 1 as a whole.

[0038] In this embodiment, the housing outer sleeve 1 is integrated with the motor end cover 104, which reduces the threaded fastening connection between the housing outer sleeve 1 and the motor end cover 104, and makes the alignment between the housing outer sleeve 1 and the motor end cover 104 better. The inner casing 2 is welded to the outer casing 1 using friction stir welding.

[0039] In this embodiment, as Figures 4-6 As shown, the outer casing 1 and inner casing 2 need to be installed after alignment to ensure that all wire holes and end faces are aligned. The connections between the wire holes and end faces are then sealed using friction stir welding to ensure the water channels do not leak. A first weld 101 is formed at the motor housing surface, a second weld 102 is formed at the three-phase outlet, and a third weld is formed at the bearing housing end face. Figure 5 The inner casing 2 and the outer casing 1 form various welds at both ends.

[0040] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An integrated housing for a water-cooled motor, characterized in that, The device includes an outer casing (1) and an inner casing (2) having an inlet water channel (203), an outlet water channel (204) and a middle water channel (205). The inlet water channel (203), the outlet water channel (204) and the middle water channel (205) are all arranged around the circumference of the inner casing (2). The middle water channel (205) is connected to the inlet water channel (203) and the outlet water channel (204) respectively. The outlet water channel (204) is located between the inlet water channel (203) and the middle water channel (205). The inlet water channel (203), the outlet water channel (204) and the middle water channel (205) are all annular water channels and are on the same plane. The inner casing (2) is welded to the outer casing (1).

2. The integrated housing for a water-cooled motor according to claim 1, characterized in that, The inner sleeve (2) of the casing includes a reinforcing rib (206) and an annular water channel. The reinforcing rib (206) is disposed in the annular water channel, and one end of the reinforcing rib (206) is connected to the wall of the annular water channel. The reinforcing rib (206) and the annular water channel form an inlet water channel (203), an outlet water channel (204), and a middle section water channel (205).

3. The integrated housing for a water-cooled motor according to claim 2, characterized in that, The reinforcing rib (206) is U-shaped and is interference-fitted with the outer casing (1).

4. The integrated housing for a water-cooled motor according to claim 1, characterized in that, The inner casing (2) also includes fins for guiding and heat dissipation. The fins are disposed in the water inlet channel (203), the water outlet channel (204) and the middle channel (205). The fins are interference-fitted with the outer casing (1).

5. The integrated housing for a water-cooled motor according to claim 4, characterized in that, The fins include guide fins (201) and heat dissipation fins (202). The guide fins (201) are symmetrically arranged at the connection between the middle water channel (205) and the inlet water channel (203) and the outlet water channel (204).

6. The integrated housing for a water-cooled motor according to claim 5, characterized in that, The guide fin (201) is arc-shaped.

7. The integrated housing for a water-cooled motor according to claim 4, characterized in that, The fins also include heat dissipation fins (202), which are installed in the middle water channel (205), the inlet water channel (203), and the outlet water channel (204).

8. The integrated housing for a water-cooled motor according to claim 1, characterized in that, The outer casing (1) includes a water outlet (105) and a water inlet (106), the water outlet (105) is connected to the water outlet channel (204), and the water inlet (106) is connected to the water inlet channel (203).

9. An integrated housing for a water-cooled motor according to claim 1, characterized in that, The housing also includes a motor end cover (104), which is integrated with the housing outer cover (1) into a whole.

10. An integrated housing for a water-cooled motor according to claim 1, characterized in that, The inner casing (2) is welded to the outer casing (1) using friction stir welding.

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