Motor casing with cooling flow channel and water-cooled motor

Abstract

The utility model discloses a motor casing with a cooling flow channel and a water-cooled motor. The motor shell is a cylindrical shell made of metal, and a continuous S-shaped cooling flow channel formed by alternately connecting axial water channels and circumferential water channels in series is designed in the motor shell. The axial water channels are uniformly distributed along the circumference of the shell and are connected end to end through the circumferential water channels, so that cooling liquid flows back and forth, the retention time of the cooling liquid is effectively prolonged, the heat exchange area is increased, and the heat dissipation uniformity is remarkably improved and a local high-temperature area is eliminated through alternate distribution of axial flowing and circumferential flowing; an axial water channel is integrally formed in the shell through an aluminum material stretching / die-casting process, a complex flow channel is constructed in cooperation with a milling groove plugging process, complex machining is avoided, and the manufacturing cost and the leakage risk are reduced. Compared with a traditional linear flow channel and a spiral flow channel, the flow channel has the advantages of efficient heat dissipation and economical efficiency, and is suitable for a high-power-density water-cooled motor.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a motor housing with cooling channels and a water-cooled motor. Background Technology

[0002] Motor cooling methods include air cooling and water cooling. Water cooling, with its excellent cooling effect, allows the motor to output higher power at the same cost, or to use less material and lower cost for the same power output. In addition, water-cooled motors are quieter than air-cooled motors. Therefore, water-cooled motors have high economic and practical value in various industries.

[0003] Existing water-cooled flow channels are mostly straight or spiral (CN103023219B). Straight flow channels have the problem of uneven coolant flow velocity distribution in the circumferential direction and inability to effectively eliminate local high temperature areas, while spiral flow channels have the defects of high processing difficulty, complex motor housing structure, and high risk of coolant leakage.

[0004] Therefore, there is an urgent need for a more reliable, more uniformly cooled, and easier-to-manufacture water-cooled motor housing and water-cooled motor. Utility Model Content

[0005] In order to overcome the above-mentioned defects of water-cooled motors, this utility model provides a motor housing with cooling channels and a water-cooled motor.

[0006] The technical solution adopted by this utility model is as follows: a motor housing with cooling channels, which is a metal cylindrical housing. The housing has a plurality of axial water channels and a plurality of circumferential water channels inside. The axial water channels extend from one end to the other inside the housing and are evenly distributed along the circumference of the housing. The circumferential water channels extend along the circumference inside the housing. The plurality of axial water channels are connected in series with the plurality of circumferential water channels, forming a continuous S-shaped cooling channel. The outer wall of the housing has a liquid inlet corresponding to the axial water channel at the beginning position and a liquid outlet corresponding to the axial water channel at the end position.

[0007] Preferably, the outer wall of the housing is provided with a boss corresponding to the positions of the liquid inlet and the liquid outlet.

[0008] Preferably, the outer wall of the housing is provided with a plurality of heat dissipation ribs extending axially.

[0009] Preferably, the front and rear end faces of the housing are provided with threaded holes for installing the front cover and the rear cover, and the threaded holes are offset from the axial water channel and the circumferential water channel.

[0010] Preferably, the semi-finished shell is made of aluminum or aluminum alloy as raw material, and the axial water channel is formed by aluminum stretching or aluminum die casting process.

[0011] The second technical solution adopted in this utility model is as follows: a water-cooled motor, which uses the aforementioned housing as the stator housing.

[0012] This utility model has the following beneficial effects:

[0013] 1. Improved cooling efficiency: The continuous S-shaped flow channel design, formed by alternating axial and circumferential water channels, enables the coolant to flow back and forth within the casing. Compared with straight flow channels, this effectively extends the coolant residence time and increases the heat exchange area. The alternating distribution of axial and circumferential flow significantly improves heat dissipation uniformity and eliminates local high-temperature areas.

[0014] 2. Structural reliability and simplified process: The axial water channel can be formed by aluminum stretching / die casting in one piece, combined with milling and sealing process to construct complex flow channels, avoiding the complex machining required for spiral flow channels, reducing manufacturing costs and leakage risks;

[0015] 3. Additional function optimization: The inlet / outlet protrusion design enhances the structural strength of the interface, reduces the risk of fatigue cracking caused by pipeline vibration, and the axial heat dissipation ribs expand the heat dissipation surface area, forming a composite heat dissipation system in conjunction with the water cooling system, further improving the overall thermal management efficiency;

[0016] 4. Economic advantages: Compared with straight flow channels, it can reduce the amount of coolant used under the same cooling performance, which is conducive to increasing the power density of motors. Compared with spiral flow channels, it has lower costs and is both feasible for production and commercial. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the external shape of the water-cooled motor in an embodiment of this utility model.

[0018] Figure 2 This is a schematic diagram of the outer shape of the shell in an embodiment of this utility model.

[0019] Figure 3 This is a schematic diagram showing the shell portion cut open in an embodiment of this utility model.

[0020] Figure 4 This is a schematic diagram of processing state one in an embodiment of this utility model.

[0021] Figure 5 This is a schematic diagram of processing state two in an embodiment of this utility model.

[0022] Casing 1;

[0023] Axial waterway 2;

[0024] Circumferential waterway 3;

[0025] Inlet 4;

[0026] Liquid outlet 5;

[0027] 6-point boss;

[0028] Heat dissipation ribs 7;

[0029] Threaded hole 8;

[0030] Front cover 9;

[0031] Rear cover 10;

[0032] Milling groove area 11;

[0033] Blocking strip 12. Detailed Implementation

[0034] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0035] In the embodiments, such as Figures 1-3 As shown, a motor housing with cooling channels is a cylindrical metal housing 1 used as the stator housing of a water-cooled motor. The housing 1 has several axial water channels 2 and several circumferential water channels 3 inside. The axial water channels 2 extend from one end to the other inside the housing 1, and are evenly distributed along the circumference of the housing 1. The circumferential water channels 3 extend circumferentially inside the housing 1. The axial water channels 2 are connected in series with the circumferential water channels 3, forming a continuous S-shaped cooling channel. An inlet 4 is provided on the outer wall of the housing 1 corresponding to the beginning position of the axial water channel 2, and an outlet 5 is provided corresponding to the end position of the axial water channel 2. In this embodiment, the continuous S-shaped cooling channel formed by the alternating series connection of the axial water channels 2 and circumferential water channels 3 allows the coolant to flow in a spiral and zigzag pattern within the housing 1, extending the coolant residence time and increasing the heat exchange area. Simultaneously, the even circumferential distribution of the axial water channels 2 and the cooperation with the circumferential water channels 3 significantly improve the heat dissipation uniformity of the housing 1 in the circumferential direction, eliminating localized high-temperature areas. The axial waterway 2 can be constructed using an aluminum stretching or die-casting process followed by sealing, combined with a milling and sealing process to create complex flow channels, thereby reducing manufacturing costs and leakage risks.

[0036] In the embodiments, such as Figures 1-3 As shown, the outer wall of the housing 1 is provided with a boss 6 at the positions corresponding to the liquid inlet 4 and the liquid outlet 5. The boss 6 facilitates the internal thread processing of the liquid inlet 4 and the liquid outlet 5, and also enhances the structural strength of the fluid interface area, effectively reducing stress concentration caused by pipeline vibration and reducing the risk of interface fatigue cracking.

[0037] In the embodiments, such as Figures 1-3 As shown, the outer wall of the housing 1 is provided with several axially extending heat dissipation ribs 7. The axial heat dissipation ribs 7 on the outer wall expand the heat dissipation area of ​​the outer surface of the housing 1, forming a composite heat dissipation system with the water cooling system, and synergistically improving the overall thermal management efficiency.

[0038] In the embodiments, such as Figures 1-3 As shown, threaded holes 8 are provided on both the front and rear end faces of the housing 1 for installing the front cover 9 and the rear cover 10. The threaded holes 8 are offset from the axial water channel 2 and the circumferential water channel 3. The spatial misalignment design between the threaded holes 8 and the water channels avoids drilling through the cooling channels, ensuring the structural integrity of the housing 1 and the sealing reliability of the cooling system.

[0039] In this embodiment, the processing technology of the housing 1 is as follows:

[0040] Step 1. Aluminum stretch forming axial water channel 2:

[0041] See Figure 4 Aluminum or aluminum alloy blanks are selected and made into regular columnar semi-finished products with equal cross-sections through aluminum stretching process. Several through axial water channels are formed inside to provide a basic flow channel structure for subsequent processing.

[0042] Step 2. Milling of circumferential waterway 3:

[0043] Using a machining center, arc-shaped milled grooves 11 are milled on both end faces of the housing 1. See [reference needed]. Figure 5 The shaded area serves as the forming area for the circumferential water channel 3. Key control point: The milled groove areas 11 at both ends of the shell must be arranged in an alternating staggered layout to ensure that subsequent series connection forms a continuous S-shaped cooling flow channel.

[0044] Step 3. Press-fitting of sealing strip 12 and integration with the flow channel:

[0045] The sealing strip 12 with a slightly larger outer dimension is pressed into the sealing area formed by two adjacent axial channels 2 and one axial channel 2, so that the depth of the milled groove area 11 is equal to the sum of the thickness of the sealing strip 12 and the width of the axial channel 2, ensuring that the cross-sectional area of ​​the flow channel is constant and avoiding sudden changes in fluid resistance.

[0046] Step 4. Friction welding seal reinforcement:

[0047] Friction welding is used to weld the joint between the sealing strip 12 and the sealing area to eliminate assembly gaps, ensure the full circumference sealing of the cooling channel, and reduce the risk of leakage.

[0048] Step 5. Post-processing and functional processing:

[0049] Perform the following procedures in sequence: machine threaded holes 8 on both ends of the housing, strictly avoiding the cooling channel area; machine liquid inlet 4 and liquid outlet 5 on the boss 6; grind the welding area and inner and outer surfaces to ensure dimensional accuracy and assembly compatibility.

[0050] In this embodiment, the axial water channel 2 is integrally formed by stretching / die casting of aluminum or aluminum alloy material. Combined with subsequent steps such as milling and plugging, the complex S-shaped cooling channel is manufactured efficiently. Compared with traditional machining, the cost is lower and the overall integrity is better, eliminating the leakage risk caused by the assembly of multiple parts.

[0051] Obviously, the above embodiments of this utility model are merely examples for illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Other obvious variations or modifications derived from the essential spirit of the present utility model still fall within the protection scope of the present utility model.

Claims

1. A motor housing with cooling channels, characterized in that, The shell (1) is made of metal and is cylindrical. The interior of the shell (1) is provided with a number of axial water channels (2) and a number of circumferential water channels (3). The axial waterway (2) extends from one end to the other inside the shell (1), and a plurality of the axial waterways (2) are evenly distributed along the circumferential direction of the shell (1). The circumferential waterway (3) extends in a circumferential direction inside the shell (1); The axial water channels (2) are connected in series end to end through the circumferential water channels (3) to form a continuous S-shaped cooling channel; The outer wall of the shell (1) has an inlet (4) at the beginning of the axial waterway (2) and an outlet (5) at the end of the axial waterway (2).

2. The motor housing with cooling channels according to claim 1, characterized in that: The outer wall of the housing (1) is provided with a boss (6) corresponding to the positions of the liquid inlet (4) and the liquid outlet (5).

3. The motor housing with cooling channels according to claim 1, characterized in that: The outer wall of the housing (1) is provided with several heat dissipation ribs (7) extending along the axial direction.

4. The motor housing with cooling channels according to claim 1, characterized in that: The housing (1) has threaded holes (8) on both the front and rear ends for installing the front end cover (9) and the rear end cover (10). The threaded holes (8) are offset from the axial water channel (2) and the circumferential water channel (3).

5. The motor housing with cooling channels according to claim 1, characterized in that: The semi-finished shell (1) is made of aluminum or aluminum alloy as raw material and is formed by aluminum stretching or aluminum die casting process to form the axial water channel (2).

6. A water-cooled motor, characterized in that, The housing (1) according to any one of claims 1-5 is used as the stator housing.

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