High-heat-conduction water-cooling motor and assembling method

Abstract

The invention discloses a high-heat-conduction water-cooling motor and an assembly method, is used for solving the problem of low heat transfer efficiency caused by incomplete attachment when a casing of a casing water-cooling motor and a stator assembly are assembled, and belongs to the technical field of motor heat dissipation. The high-heat-conduction water-cooling motor comprises a casing, a stator assembly and a heat conduction layer, and the heat conduction layer is arranged between the casing and the stator assembly and is tightly attached to the casing and the stator assembly. The assembling method of the high-heat-conduction water-cooling motor comprises the following steps: step 1, connecting a casing with a heat conduction sleeve through a shrinkage fit process, and filling a gap between the casing and a stator assembly with the heat conduction sleeve; 2, after the machine shell is cooled, the machine shell and the heat conduction sleeve are regarded as a first assembly, and then the stator assembly is connected with the first assembly through a hot jacket process.

Description

Technical Field

[0001] The invention belongs to the technical field of motor heat dissipation, and in particular relates to a high-conductivity hot water-cooled motor and an assembly method thereof. Background Art

[0002] The motor is an electrical device that uses the principle of electromagnetic induction to convert electromechanical energy. Its application has penetrated into all areas of the national economy. A large amount of heat is generated during the operation of the motor, and a good cooling system plays an important role in the stable performance of the motor. The casing water-cooled motor is usually assembled with the casing and stator through a shrink-fit process, but due to the limitations of the processing and assembly processes, there is inevitably a gap between the casing and the stator, which affects the heat transfer and the heat dissipation efficiency of the motor.

[0003] The heat dissipation method in the prior art has an integrated design of the casing cooling water channel, and the heat dissipation area is increased by designing a liquid collecting device and a diverter pipe. However, this structure has problems such as too many splicing points and a high risk of leakage. The assembly method of the inner surface of the casing and the stator is still the traditional bonding method, and no improvement has been made.

[0004] In the prior art, there is also a heat dissipation method in which a spiral water pipe structure made of cast aluminum is installed on the casing for cooling water flow. The cooling structure is in plane contact with the stator assembly, which also has problems such as incomplete contact and poor heat conduction performance. Summary of the invention

[0005] The purpose of the present invention is to provide a high-conductivity water-cooled motor and an assembly method, which are used to solve the problem of low heat transfer efficiency caused by incomplete fitting between the casing and the stator assembly of a water-cooled motor. Aluminum high-thermal conductivity material is installed / filled between the casing and the stator to reduce the air gap between the casing and the stator assembly, thereby improving the heat dissipation efficiency of the motor.

[0006] The present invention is achieved by adopting the following technical solutions: A high-conductivity water-cooled motor comprises a casing, a stator assembly and a heat-conducting layer, wherein the heat-conducting layer is arranged between the casing and the stator assembly and is closely fitted to the casing and the stator assembly.

[0007] When used, the gap between the housing and the stator assembly is filled with a heat-conducting layer. After filling, there is a high thermal conductivity filling medium between the housing and the stator assembly, which facilitates the transfer of heat from the stator assembly to the housing, thereby improving the heat dissipation capacity of the motor.

[0008] Further preferably, the casing comprises an outer cylinder and an inner cylinder, water channel ribs are arranged between the inner wall of the outer cylinder and the outer wall of the inner cylinder, and inner cavity ribs are arranged on the inner wall of the inner cylinder.

[0009] Further preferably, the housing and the stator assembly are installed by shrink fitting, and the stator assembly fits tightly with the inner cavity ribs.

[0010] Further preferably, the heat conducting layer is made of a high thermal conductivity material, preferably aluminum.

[0011] Further preferably, the water channel ribs are arranged radially along the casing to form a Z-shaped water channel or surround along the circumferential direction of the casing to form a spiral water channel.

[0012] Further preferably, the cross section of the stator assembly is a tooth-shaped structure, and the tooth shape of the tooth-shaped structure corresponds one-to-one with the inner cavity ribs and can fit tightly.

[0013] Further preferably, the heat-conducting layer is a heat-conducting sleeve, and the heat-conducting sleeve and the casing are installed inside the casing by shrink fitting. The mold is cast or the structure of the heat-conducting sleeve is designed through the structure of the motor casing and the stator assembly, and then the heat-conducting sleeve is cast.

[0014] Further preferably, the heat-conducting sleeve includes a plurality of heat-conducting plates, which form the tube wall of the heat-conducting sleeve, and a gap one adapted to the inner cavity rib is provided between the heat-conducting plates, and the length of the gap one is not less than the length of the inner cavity rib, and one end of all the heat-conducting plates is commonly connected with an annular boss, and the inner diameter of the annular boss is equal to the inner diameter of the heat-conducting sleeve, and the outer diameter is larger than the outer diameter of the heat-conducting sleeve, and the annular boss facilitates rapid positioning when assembling the heat-conducting sleeve, which is beneficial for rapid installation of the heat-conducting sleeve into place inside the casing.

[0015] Further preferably, the other end of each heat conducting plate is connected to the adjacent heat conducting plate via a connecting block, the thickness of the connecting block is less than the thickness of the heat conducting plate and is flush with the inner surface of the heat conducting sleeve, and the function of the connecting block is to maintain the roundness of the heat conducting sleeve so that each heat conducting plate can well fill the gap between the stator assembly and the casing.

[0016] A method for assembling a high-conductivity hot water cooling motor is implemented by the above-mentioned high-conductivity hot water cooling motor, and the specific steps are as follows: Step 1: Connect the housing and the thermally conductive sleeve by a shrink sleeve process, and use the thermally conductive sleeve to fill the gap between the housing and the stator assembly; S1, the heat-conducting sleeve cannot be inserted before the casing is heated. After the casing is heated, the heat-conducting sleeve is pushed into the inner tube of the casing, and the inner cavity ribs of the inner wall of the inner tube are aligned with the gap between the heat-conducting plates; S2, the heat-conducting sleeve is pushed into the casing until the annular boss is stuck on one side of the casing, and then the heat-conducting sleeve and the casing are assembled after the casing cools down; S3, after the casing cools down, the connecting block is stuck on the other side of the casing.

[0017] Step 2: After the casing is cooled, the casing and the heat-conducting sleeve are regarded as an assembly one, and then the stator assembly is connected to the assembly one through a shrink-fit process.

[0018] The beneficial effects of the present invention are as follows: The stator assembly is designed as a tooth-shaped structure, which can serve as a positioning surface for the inner cavity ribs and increase the heat dissipation area.

[0019] A heat-conducting layer of high thermal conductivity material is installed between the motor stator assembly and the casing. After the casing and the aluminum sleeve are installed, they are thermally sleeved with the motor rotor to improve the heat dissipation efficiency of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 Shows the existing motor structure Figure 1 .

[0023] Figure 2 Schematic diagram of the stator assembly tooth structure.

[0024] Figure 3 A schematic diagram of the structure of the heat-conducting sleeve is shown.

[0025] In the figure: 1- housing, 101- outer cylinder, 102- water channel ribs, 103- inner cylinder, 104- inner cavity ribs, 2- stator assembly, 201- toothed structure, 3- pull plate, 4- heat conduction sleeve, 401- annular boss, 402- heat conduction plate, 403- gap one, 404- connecting block. DETAILED DESCRIPTION

[0026] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0027] In the description, it should be noted that the terms "first" and "second" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0029] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0030] A high-conductivity water-cooled motor comprises a casing 1, a stator assembly 2, and a heat-conducting layer, wherein the heat-conducting layer is arranged between the casing 1 and the stator assembly 2 and is closely fitted to the casing 1 and the stator assembly 2.

[0031] The casing 1 includes an outer cylinder 101 and an inner cylinder 103. Water channel ribs 102 are arranged between the inner walls of the outer cylinder 101 and the outer walls of the inner cylinder 103. Inner cavity ribs 104 are arranged on the inner wall of the inner cylinder 103. The water channel ribs 102 are arranged radially along the casing 1 to form a Z-shaped water channel or surround the casing 1 in the circumferential direction to form a spiral water channel.

[0032] The housing 1 and the stator assembly 2 are installed by shrink fitting, and the stator assembly 2 and the inner cavity rib 104 are tightly fitted.

[0033] The heat-conducting layer is made of a high-thermal-conductivity material, preferably metal aluminum. Aluminum has a low density and is light in weight, and can improve the heat dissipation efficiency of the motor without increasing the weight of the motor.

[0034] In the first embodiment, the heat-conducting layer is a heat-conducting sleeve 4, and the heat-conducting sleeve 4 and the casing 1 are installed inside the casing 1 through shrink fitting. It should be noted that under normal circumstances, the outer diameter of the heat-conducting sleeve 4 is larger than the size of the inner cylinder 103 of the casing 1. The casing 1 must be heated to generate thermal expansion in the radial direction, and the heat-conducting sleeve 4 can be pushed into the casing 1, and then the heat-conducting sleeve 4 and the casing 1 can be closely fitted.

[0035] The heat-conducting sleeve 4 includes a plurality of heat-conducting plates 402, all of which form the wall of the heat-conducting sleeve 4, and a gap 403 adapted to the inner cavity rib 104 is provided between the heat-conducting plates 402, the length of the gap 403 is not less than the length of the inner cavity rib 104, and one end of all the heat-conducting plates 402 is commonly connected to an annular boss 401, the inner diameter of the annular boss 401 is equal to the inner diameter of the heat-conducting sleeve 4, and the outer diameter is greater than the outer diameter of the heat-conducting sleeve 4. It should be noted that the heat-conducting plates 402 change according to the structural changes of the inner cavity rib 104.

[0036] The other end of each heat conducting plate 402 is connected to the adjacent heat conducting plate 402 via a connecting block 404 . The thickness of the connecting block 404 is smaller than that of the heat conducting plate 402 and is flush with the inner surface of the heat conducting sleeve 4 .

[0037] It should be noted that in order to maintain the roundness of the heat-conducting sleeve 4 , one end of all heat-conducting plates 402 maintains the roundness through the annular boss 401 , and the other end maintains the roundness through the connecting block 404 .

[0038] It should be noted that when the casing 1 and the thermally conductive sleeve 4 are thermally mounted, due to the thermal expansion of the casing 1, the size of the inner cavity rib 104 will also become longer accordingly, and the length of the gap 403 reserved between the heat conductive plates 402 of the thermally conductive sleeve 4 may be insufficient. In order to solve this problem, the thickness of the connecting block 404 is set to be smaller than the thickness of the heat conductive plate 402. In this way, after the thermally conductive sleeve 4 is pushed into the casing 1, the groove formed by the connecting block 404 and the adjacent heat conductive plate 402 can be used to accommodate the grown inner cavity rib 104, so that the thermally conductive sleeve 4 and the casing 1 can be tightly fitted through the thermal mounting.

[0039] The working principle is as follows: the aluminum heat-conducting sleeve 4 is first cast in a mold according to the structure of the stator assembly 2 and the housing 1, and then a suitable heat-conducting sleeve 4 is cast. After the aluminum heat-conducting sleeve 4 is installed with the inner cylinder 103 of the housing 1, it is shrink-fitted with the stator assembly 2.

[0040] When in use, the casing 1 and the aluminum heat-conducting sleeve 4 are first installed by a shrink-fit process, and then assembled with the stator assembly 2 by a shrink-fit process. The stator assembly 2 fits tightly with the inner cavity ribs 104 of the casing 1 and the aluminum heat-conducting sleeve 4, reducing the gap between the stator assembly 2 and the casing 1 to improve its thermal conductivity and improve the heating of the motor.

[0041] In the second embodiment, the stator assembly 2 is a cylindrical structure, and the stator assembly 2 is assembled with the inner cavity rib 104 of the housing 1 by shrink fitting. After the stator assembly 2 and the housing 1 are assembled by shrink fitting, aluminum is filled between the stator and the inner cylinder 103 of the housing 1, and the stator assembly 2 and the housing 1 are tightly fitted by casting with aluminum.

[0042] It should be noted that when the stator assembly 2 is a cylindrical structure, the housing 1 and the heat-conducting sleeve 4 can be assembled by shrink-fitting first, and then assembled with the stator assembly 2 by shrink-fitting.

[0043] In the third embodiment, the cross section of the stator assembly 2 is a tooth-shaped structure 201 , and the tooth shape of the tooth-shaped structure 201 corresponds one-to-one with the inner cavity rib 104 and can fit tightly, thereby increasing the heat dissipation area between the stator assembly 2 and the housing 1 .

[0044] like Figure 3 As shown, the stator assembly 2 is a structure with a pull plate 3. The punching sheets of the stator assembly 2 are welded together through the pull plate 3 to improve the integrity. The gaps between the stator assembly 2, the pull plate 3 and the inner cavity ribs 104 of the housing 1 are filled with aluminum casting. After taking protective measures, liquid aluminum can be cast, and the stator assembly 2 and the housing 1 can be closely fitted after the liquid aluminum is cooled and formed.

[0045] Embodiment 4: The steps of assembling a high-conductivity hot water cooling motor according to Embodiment 1 are as follows: Step 1: Connect the housing 1 and the heat-conducting sleeve 4 by a shrink-fit process, and use the heat-conducting sleeve 4 to fill the gap between the housing 1 and the stator assembly 2; S1, before the casing 1 is heated, the heat-conducting sleeve 4 cannot be inserted. After the casing 1 is heated, the heat-conducting sleeve 4 is pushed into the inner tube 103 of the casing 1, and the inner cavity ribs 104 of the inner wall of the inner tube 103 are aligned with the gap 403 between the heat-conducting plates 402; S2, the heat-conducting sleeve 4 is pushed into the casing 1 until the annular boss 401 is stuck on one side of the casing 1, and then the heat-conducting sleeve 4 and the casing 1 are assembled after the casing 1 is cooled; S3, after the housing 1 cools down, the connecting block 404 is stuck on the other side of the housing 1.

[0046] Step 2: After the casing 1 is cooled, the casing 1 and the heat-conducting sleeve 4 are regarded as an assembly 1, and then the stator assembly 2 is connected to the assembly 1 through a shrink-fit process.

[0047] The above is only a specific implementation of the present invention, which enables those skilled in the art to understand or implement the present invention. Although detailed descriptions are given with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments, and they should all be covered by the protection scope of the claims.

Claims

1. A high-conductivity hot water-cooled motor, comprising a housing (1) and a stator assembly (2), characterized in that: It also comprises a heat-conducting layer, which is arranged between the casing (1) and the stator assembly (2) and is tightly fitted to the casing (1) and the stator assembly (2).

2. A high-conductivity hot water-cooled motor according to claim 1, characterized in that: The casing (1) comprises an outer cylinder (101) and an inner cylinder (103), a water channel rib (102) is provided between the inner wall of the outer cylinder (101) and the outer wall of the inner cylinder (103), and an inner cavity rib (104) is provided on the inner wall of the inner cylinder (103).

3. A high-conductivity hot water-cooled motor according to claim 2, characterized in that: The housing (1) and the stator assembly (2) are installed by shrink fitting, and the stator assembly (2) is tightly fitted to the inner cavity rib (104).

4. A high-conductivity hot water-cooled motor according to claim 2, characterized in that: The heat-conducting layer is made of a high heat-conducting material.

5. A high-conductivity hot water-cooled motor according to claim 2, characterized in that: The water channel ribs (102) are arranged radially along the casing (1) to form a Z-shaped water channel or are arranged along the circumferential direction of the casing (1) to form a spiral water channel.

6. A high-conductivity hot water cooling motor according to any one of claims 2 to 5, characterized in that: The cross section of the stator assembly (2) is a tooth-shaped structure (201), and the tooth shape of the tooth-shaped structure (201) corresponds one-to-one with the inner cavity rib (104) and can fit tightly.

7. A high-conductivity hot water-cooled motor according to any one of claims 2 to 5, characterized in that: The heat-conducting layer is a heat-conducting sleeve (4), and the heat-conducting sleeve (4) and the casing (1) are installed inside the casing (1) by means of a shrink fit.

8. A high-conductivity hot water-cooled motor according to claim 7, characterized in that: The heat-conducting sleeve (4) comprises a plurality of heat-conducting plates (402), the heat-conducting plates (402) forming a tube wall of the heat-conducting sleeve (4), and a gap (403) adapted to the inner cavity rib (104) is provided between the heat-conducting plates (402), the length of the gap (403) being not less than the length of the inner cavity rib (104), and one end of all the heat-conducting plates (402) being commonly connected to an annular boss (401), the inner diameter of the annular boss (401) being equal to the inner diameter of the heat-conducting sleeve (4), and the outer diameter being greater than the outer diameter of the heat-conducting sleeve (4).

9. A high-conductivity hot water-cooled motor according to claim 8, characterized in that: The other end of each heat conducting plate (402) is connected to an adjacent heat conducting plate (402) via a connecting block (404); the thickness of the connecting block (404) is smaller than the thickness of the heat conducting plate (402) and is flush with the inner surface of the heat conducting sleeve (4).

10. A method for assembling a high-conductivity hot water cooling motor, characterized in that: This is achieved by a high-conductivity hot water cooling motor as described in claim 9; Step 1: Connect the housing (1) and the heat-conducting sleeve (4) by means of a shrink-fit process, and use the heat-conducting sleeve (4) to fill the gap between the housing (1) and the stator assembly (2); S1, before the casing (1) is heated, the heat-conducting sleeve (4) cannot be inserted, and after the casing (1) is heated, the heat-conducting sleeve (4) is pushed into the interior of the inner cylinder (103) of the casing (1), and the inner cavity ribs (104) on the inner wall of the inner cylinder (103) are aligned with the gap (403) between the heat-conducting plates (402); S2, the heat-conducting sleeve (4) is pushed into the interior of the casing (1) until the annular boss (401) is stuck on one side of the casing (1), and then after the casing (1) cools down, the heat-conducting sleeve (4) and the casing (1) are assembled; S3, after the casing (1) cools down, the connecting block (404) is stuck on the other side of the casing (1); Step 2: After the casing (1) is cooled, the casing (1) and the heat-conducting sleeve (4) are regarded as an assembly part 1, and then the stator assembly (2) is connected to the assembly part 1 through a shrink-fit process.

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