Cooling channel structure and stator assembly

Abstract

The present invention provides a cooling channel structure and a stator assembly. The cooling channel structure includes a cooling inlet, a cooling outlet, and a channel communicating between the cooling inlet and the cooling outlet. Flow dividers are arranged at intervals on the inner and outer side walls of the channel. The flow divider includes a flow dividing portion and a connecting portion. The flow dividing portion is connected to the inner and outer side walls of the channel through the connecting portion. A component to be cooled is fixed on the flow dividing portion, and an eddy current portion is formed between the component to be cooled and the connecting portion, so that the passing cooling medium forms a longitudinal eddy current, thereby improving the heat exchange efficiency of the component to be cooled and thus enhancing the cooling performance.

Description

Technical Field

[0001] The present invention relates to the field of heat exchange, and particularly to a cooling channel structure and a stator assembly. Background Art

[0002] With the development of industries such as new energy vehicles, the performance requirements for motors are getting higher and higher, especially the power density and torque density of motors are required to be greatly improved. The key to restricting the improvement of the power density and torque density of motors lies in the heat dissipation ability of motors. Once the heat dissipation is insufficient, the temperature rise inside the motor will be relatively high, resulting in problems such as damage to the insulation layer and demagnetization of the permanent magnet, thus affecting the working performance of the motor.

[0003] Among them, the main heat-generating components of the motor are the stator core, etc. The existing cooling method is to arrange water channels on the outer shell to exchange heat with the heat-generating components to achieve the cooling effect. However, the hydraulic diameter of the existing water channels is relatively large, and the degree of turbulence is relatively low, resulting in a relatively low heat exchange effect and a risk of insufficient heat dissipation. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a cooling channel structure and a stator assembly that can effectively improve the heat exchange efficiency.

[0005] A cooling channel structure includes a cooling inlet, a cooling outlet, and a channel communicating between the cooling inlet and the cooling outlet. Shunt members are arranged at intervals on the inner and outer side walls of the channel. The shunt member includes a shunt portion and a connecting portion. The shunt portion is connected to the inner and outer side walls of the channel through the connecting portion. A component to be cooled is fixed on the shunt portion, and an eddy current portion is formed between the component to be cooled and the connecting portion, so that the passing cooling medium forms a longitudinal eddy current.

[0006] Optionally, the width of the free end of the shunt member is greater than the width of the connection end of the shunt member and the inner side wall of the channel.

[0007] Optionally, the shunt member connected to the outer side wall of the channel is trapezoidal or rectangular.

[0008] Optionally, one end of the shunt portion away from the connecting portion is circular.

[0009] Optionally, the channel is annular, and a partition member is arranged in the channel. The cooling inlet and the cooling outlet are located on both sides of the partition member, and the cooling inlet and the cooling outlet are located between the partition member and its adjacent shunt member.

[0010] Optionally, two first baffle members and two second baffle members are further provided in the flow channel, and are located on the same side of the partition member. The first baffle member is connected to the partition member, and the second baffle member is connected to the flow dividing member adjacent to the partition member.

[0011] Optionally, the second baffle member opposite to the cooling inlet is arranged in parallel with the first baffle member opposite to the cooling outlet, and the first baffle member opposite to the cooling inlet is arranged in parallel with the second baffle member opposite to the cooling outlet.

[0012] A stator assembly includes a housing and an iron core. The housing is provided with the cooling flow channel structure of the above embodiment, and the iron core is fixed on the cooling flow channel structure.

[0013] Optionally, a barrier member is further included, and the barrier member is installed between the cooling flow channel structure and the iron core.

[0014] Optionally, an installation hole for fixing the iron core is provided at one end of the flow dividing portion away from the connecting portion.

[0015] Compared with the prior art, the technical solution of the present invention has the following advantages:

[0016] Two adjacent flow dividing members are staggeredly arranged on the inner and outer side walls, so that the cooling medium passes through between two adjacent flow dividing members in a Z shape, increasing the contact area between the cooling medium and the member to be cooled, and improving the heat exchange efficiency. The cooling medium passes through the eddy current portion between the member to be cooled and the connecting portion and forms a longitudinal eddy current, thereby further improving the heat exchange efficiency of the member to be cooled and improving the cooling performance.

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. Description of the Drawings

[0018] Figure 1 Shows a schematic structural diagram of the cooling flow channel structure of the present invention;

[0019] Figure 2 Shows a perspective view of the first embodiment of the flow dividing member of the present invention;

[0020] Figure 3 Shows a front view of the first embodiment of the flow dividing member of the present invention;

[0021] Figure 4 Shows a perspective view of the second embodiment of the flow dividing member of the present invention;

[0022] Figure 5 Shows a front view of the second embodiment of the flow dividing member of the present invention;

[0023] Figure 6Shows an exploded view of the stator assembly of the present invention;

[0024] Figure 7 Shows a schematic structural view of the stator assembly of the present invention;

[0025] Figure 8 Shows a partial cross-sectional view of the stator assembly of the present invention;

[0026] Figure 9 Shows a schematic structural view of the barrier member of the present invention. Detailed implementation manners

[0027] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are only examples, and other obvious variations can be conceived by those skilled in the art. The basic principles defined in the following description of the present invention can be applied to other embodiments, variations, improvements, equivalent embodiments, and other technical solutions without departing from the spirit and scope of the present invention.

[0028] Those skilled in the art should understand that in the disclosure of the present invention, the orientation or positional relationships indicated by the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on the present invention.

[0029] It can be understood that the term "one" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of one element can be one, and in other embodiments, the number of this element can be multiple. The term "one" should not be construed as a limitation on the quantity.

[0030] As Figures 1 to 5 shown, the cooling channel structure 100 is used to pass a cooling medium and perform heat exchange on the piece to be cooled, and includes a cooling inlet 111, a cooling outlet 112, and a channel 110 communicating between the cooling inlet 111 and the cooling outlet 112. The inner and outer side walls 1101, 1102 of the channel 110 are provided with shunt members 120 at intervals. The shunt member 120 includes a shunt portion 121 and a connecting portion 122. The shunt portion 121 is connected to the inner and outer side walls 1101, 1102 of the channel 110 through the connecting portion 122. The piece to be cooled is fixed on the shunt portion 121, and an eddy current portion 123 is formed between the piece to be cooled and the connecting portion 122, so that the passed cooling medium forms a longitudinal eddy current.

[0031] The cooling medium can be oil, cooling water, etc. The cooling medium can enter the flow channel 110 from the cooling inlet 111, be split under the influence of the flow splitting member 120, and discharged from the cooling outlet 112. The cooling medium flows along the outer contour of the flow splitting member 120. Taking the flow splitting portion connected to the outer side wall 1102 as an example, the cooling medium passes through the gap between the flow splitting portion and the inner side wall 1101. At the same time, the cooling medium passes through the eddy current portion between the component to be cooled and the connecting portion and forms a longitudinal eddy current, thereby improving the heat exchange efficiency of the component to be cooled and enhancing the cooling performance. The component to be cooled can be a stator, but is not limited thereto.

[0032] As Figure 1 shown, the thickness of the flow splitting portion 121 is the same as the depth of the flow channel 110, while the thickness of the connecting portion 122 is less than the thickness of the flow splitting portion 121, that is, there is a height difference between the flow splitting portion 121 and the connecting portion 122. When the component to be cooled is abutted and fixed on the flow splitting portion 121, there is a gap between the component to be cooled and the connecting portion 122, and this gap forms an eddy current portion 123 for the cooling medium to form a longitudinal eddy current.

[0033] Wherein, the thickness of the flow splitting portion 121 and the thickness of the connecting portion 122 refer to their lengths in the depth direction of the flow channel 110.

[0034] As Figure 1 shown, the flow splitting members 120 are arranged at intervals on the inner and outer side walls 1101, 1102 of the flow channel 110, that is, two adjacent flow splitting members 120 are staggered on the inner and outer side walls 1101, 1102, so that the cooling medium passes through between two adjacent flow splitting members in a Z shape, increasing the contact area between the cooling medium and the component to be cooled and enhancing the heat exchange efficiency.

[0035] The free end of the flow splitting member 120 is circular, and the connection between the connecting portion 122 and the inner and outer side walls 1101, 1102 is in an arc transition, which not only improves the structural strength and connection strength, but also effectively improves the fluidity of the cooling medium.

[0036] The outer shapes of the flow splitting members 120 connected to the inner and outer side walls 1101, 1102 may be different, and the following examples are used to introduce in detail:

[0037] The flow splitter 120 has three shapes, namely a first fluid splitter 120a, a second fluid splitter 120b, and a third fluid splitter 120c. Among them, the first fluid splitter 120a and the second fluid splitter 120b are connected to the outer sidewall 1102, and there are gaps between the first fluid splitter 120a and the second fluid splitter 120b and the inner sidewall 1101 respectively, so that the cooling medium can pass through. The third fluid splitter 120c is connected to the inner sidewall 1101 and there is a gap between it and the outer sidewall 1102.

[0038] The width of the free end of the third fluid splitter 120c is greater than the width of the connecting end of the third fluid splitter 120c and the inner sidewall 1101, so as to prevent the cooling medium from detaching at the free end of the third fluid splitter 120c. The hydraulic diameters of the inner and outer sides differ greatly, and the hydraulic diameter of the outer side is greater than that of the inner side. Therefore, by increasing the width of the free end of the third fluid splitter 120c located on the outer side, it is possible to prevent the cooling medium from detaching due to centrifugal force at this position, and avoid the increase of local eddy current and flow resistance, which affects the heat exchange efficiency.

[0039] Specifically, the third fluid splitter 120c can be trapezoidal, the width of its connecting end with the inner sidewall 1101 is smaller than the width of the free end of the third fluid splitter 120c, and the free end of the third fluid splitter 120c is circular. The free end of the third fluid splitter 120c refers to the end of the third fluid splitter 120c far from the inner sidewall 1101.

[0040] As Figure 1 、 Figure 4 and Figure 5 shown, the second fluid splitter 120b is rectangular, and the end of the second fluid splitter 120b far from the outer sidewall 1102 is circular. Of course, the second fluid splitter 120b can also be trapezoidal, that is, the width of the second fluid splitter 120b connected to the outer sidewall 1102 is smaller than the width of the free end of the second fluid splitter 120b, or the width of the second fluid splitter 120b connected to the outer sidewall 1102 is greater than the width of the free end of the second fluid splitter 120b.

[0041] As Figures 1 to 3 shown, the first fluid splitter 120a includes a flow splitting portion 121 and a connecting portion 122. The flow splitting portion 121 is circular, the connecting portion 122 is rectangular, and there is an arc transition between the connecting portion 122 and the flow splitting portion 121 and the outer sidewall 1102 respectively.

[0042] Specifically, the length of the connecting portion 122 can be consistent with the diameter of the circular flow dividing portion 121, while the length of the connecting portion 122 on the second fluid dividing member 120b and the third fluid dividing member 120c is shorter. Additionally, the gap between the first fluid dividing member 120a and the outer side wall 1102 is larger than the gap between the second fluid dividing member 120b and the outer side wall 1102.

[0043] Reference Figure 2 , a mounting hole 1211 for fixing the component to be cooled is provided at the center of the circular flow dividing portion 121. For example, bolts are passed through the mounting hole 1211 to fix the component to be cooled on the flow dividing portion 121, making rational use of the structure to make the structure more compact and novel.

[0044] Continue to refer to Figure 1 , three of the third fluid dividing members 120c and two of the second fluid dividing members 120b are arranged between two adjacent first fluid dividing members 120a. Of course, rearrangement can also be made according to design requirements, such as only using the third fluid dividing member 120c and the second fluid dividing member 120b, etc.

[0045] As Figure 1 shown, the flow channel 110 is annular. By connecting the separating member 140 between the inner and outer side walls, two adjacent and opposite ends can be formed, and then the cooling medium enters from the cooling inlet 111 and passes through the flow channel along the flow direction and is discharged from the cooling outlet 112. The flow channel 110 can also be in other shapes, such as S-shaped, W-shaped, linear, etc.

[0046] Both the cooling inlet 111 and the cooling outlet 112 are adjacent to the separating member 140 and can be located on the outer side wall 1102 and / or the inner side wall 1101. Preferably, both the cooling inlet 111 and the cooling outlet 112 are provided on the outer side wall 1102.

[0047] The flow dividing member 120 and the separating member 140 can extend along the radial direction of the annular flow channel 110, and the length of its connecting portion 122 in the radial direction can be less than or equal to the length of the flow dividing portion 121 in the radial direction. Of course, it is also allowed for the flow dividing member 120 to be inclined relative to the radial direction of the flow channel 110.

[0048] As Figure 1As shown, two first baffle members 150 are further provided in the flow channel 110. Both of the two first baffle members 150 are connected to the partition member 140 and are respectively opposite to the cooling inlet 111 and the cooling outlet 112, so that the cooling medium entering from the cooling inlet 111 flows along the contour of the first baffle member 150 and then passes between two adjacent flow dividing members 120 in sequence. Similarly, the cooling medium after being divided by the flow dividing body 120 is discharged from the cooling outlet 112 under the baffle action of the first baffle member 150.

[0049] Specifically, the first baffle member 150 can be perpendicular to the partition member 140, and its shape can be the same as that of the flow dividing body 120, such as trapezoidal or rectangular. When the component to be cooled abuts against the first baffle member 150, a vortex portion for the cooling medium to pass through and form a vortex can be formed between the two.

[0050] As Figure 1 As shown, two second baffle members 160 are further provided in the flow channel 110, which are respectively located at the cooling inlet 111 and the cooling outlet 112 and are connected to the adjacent flow dividing members 120, so that the cooling medium flows through the first baffle member 150 and the second baffle member 160 in a baffle manner.

[0051] Specifically, the second baffle member 160 opposite to the cooling inlet 111 is located on the side of the first baffle member 150 away from the cooling inlet 111, and there is a gap between the first baffle member 150 and the adjacent flow dividing member 120, and there is a gap between the second baffle member 160 and the partition member 140, so that the cooling medium flows through the first baffle member 150 and the second baffle member 160 in a baffle manner. The second baffle member 160 opposite to the cooling outlet 112 is located on the side of the first baffle member 150 away from the cooling outlet 112, and there is a gap between the first baffle member 150 and the adjacent flow dividing member 120, and there is a gap between the second baffle member 160 and the partition member 140, so that the cooling medium flows through the first baffle member 150 and the second baffle member 160 and is finally discharged from the cooling outlet 112. In one example, the flow dividing members 120 adjacent to the cooling inlet 111 and the cooling outlet 112 are the third flow dividing members 120c, and the second baffle member 160 is connected to its circular flow dividing portion 121.

[0052] The second baffle member 160 has the same shape as the first baffle member 150, such as trapezoidal or rectangular. When the component to be cooled abuts against the second baffle member 160, a vortex portion for the cooling medium to pass through and form a vortex can be formed between the two.

[0053] More specifically, the second baffle 160 may also be perpendicular to the partition 140. Of course, the first baffle 150 and the second baffle 160 may also be slightly inclined as long as the cooling channel passes between the first baffle 150 and the second baffle 160 in a Z shape.

[0054] Furthermore, the second baffle 160 opposite to the cooling inlet 111 is arranged in parallel with the first baffle 150 opposite to the cooling outlet 112. The first baffle 150 opposite to the cooling inlet 111 is arranged in parallel with the second baffle 160 opposite to the cooling outlet 112.

[0055] In summary, two adjacent flow dividers 120 are staggeredly arranged on the inner and outer sidewalls 1101, 1102, so that the cooling medium passes between two adjacent flow dividers in a Z shape, increasing the contact area between the cooling medium and the part to be cooled and improving the heat exchange efficiency. The cooling medium passes through the eddy current part between the part to be cooled and the connecting part and forms a longitudinal eddy current, thereby improving the heat exchange efficiency of the part to be cooled and thus enhancing the cooling performance.

[0056] As Figures 6 to 9 shown, the present invention also provides a stator assembly, including a housing 200 and an iron core 300. The housing 200 is provided with the cooling channel structure 100 of the above embodiment. The iron core 300 is sleeved on the housing 200 and fixed to the cooling channel structure 100 to cool the iron core 300 through the cooling channel structure 100. Since the stator assembly adopts the cooling channel structure 100 of the above embodiment, the beneficial effects brought by the cooling channel structure 100 to the stator assembly refer to the above embodiment.

[0057] The iron core 300 can be fixed to the cooling channel structure 100 by bolts 400. Specifically, referring to Figure 1 、 Figure 3 and Figure 5 , threaded holes 310 are formed in the iron core 300, and the bolts 400 are screwed with the threaded holes 310 through the mounting holes 1211 to fix the iron core 300.

[0058] As Figure 6 shown, the stator assembly further includes a barrier 500. The barrier 500 is installed between the cooling channel structure 100 and the iron core 300 and is used to block the cooling medium and the iron core 300. The barrier 500 can be made of a material with good heat transfer.

[0059] The barrier member 500 may be a pipe, whose shape is adapted to the cooling flow channel structure 100 and is clamped in the cooling flow channel structure 100. It includes an inlet pipe 510 and an outlet pipe 520. The inlet pipe 510 is disposed opposite to the cooling inlet 111, and the outlet pipe 520 is disposed corresponding to the cooling outlet 112. And the barrier member 500 is provided with through holes 530 through which the shunt members 120a, 120b, the flow blocking members 130a, 130b, the flow dividing member 150 and the flow combining member 160 pass respectively. Of course, the barrier member 500 may be a plate fixed to the cooling flow channel structure 100.

[0060] In addition, those skilled in the art can also change the shapes, structures and materials of the flow dividing member, the first baffle member and the second baffle member according to actual situations. As long as on the basis of the above disclosure of the present invention, the same or similar technical solutions as those of the present invention are adopted, the same or similar technical problems as those of the present invention are solved, and the same or similar technical effects as those of the present invention are achieved, they all fall within the protection scope of the present invention. The specific implementation manners of the present invention are not limited thereto.

[0061] That is to say, as long as on the basis of the above disclosure of the present invention, the same or similar technical solutions as those of the present invention are adopted, the same or similar technical problems as those of the present invention are solved, and the same or similar technical effects as those of the present invention are achieved, they all fall within the protection scope of the present invention. The specific implementation manners of the present invention are not limited thereto.

[0062] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0063] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the drawings are only examples and do not limit the present invention. The object of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and described in the embodiments. Without departing from the above principles, the embodiments of the present invention can have any deformation or modification.

Claims

1. A cooling channel structure, characterized in that, It includes a cooling inlet, a cooling outlet, and a flow channel communicating between the cooling inlet and the cooling outlet. Shunt members are arranged at intervals on the inner and outer side walls of the flow channel. The shunt member includes a shunt portion and a connecting portion. The shunt portion is connected to the inner and outer side walls of the flow channel through the connecting portion. A member to be cooled is fixed on the shunt portion, and there is a gap between the member to be cooled and the connecting portion to form a vortex portion, so that the passing cooling medium forms a longitudinal vortex.

2. The cooling flow channel structure according to claim 1, wherein The width of the free end of the shunt member is greater than the width of the connection end of the shunt member and the inner side wall of the flow channel.

3. The cooling flow channel structure according to claim 1, characterized in that The shunt member connected to the outer side wall of the flow channel is trapezoidal or rectangular.

4. The cooling channel structure according to claim 1, wherein One end of the shunt portion away from the connecting portion is circular.

5. The cooling channel structure according to claim 1, wherein, The flow channel is annular, and a partition member is arranged in the flow channel. The cooling inlet and the cooling outlet are located on both sides of the partition member, and the cooling inlet and the cooling outlet are located between the partition member and its adjacent shunt member.

6. The cooling channel structure according to claim 5, wherein Two first flow deflectors and two second flow deflectors are also arranged in the flow channel and are respectively arranged on both sides of the partition member. Among those on the same side of the partition member, the first flow deflector is connected to the partition member, and the second flow deflector is connected to the shunt member adjacent to the partition member.

7. The cooling channel structure according to claim 6, wherein, The second flow deflector opposite to the cooling inlet is arranged in parallel with the first flow deflector opposite to the cooling outlet, and the first flow deflector opposite to the cooling inlet is arranged in parallel with the second flow deflector opposite to the cooling outlet.

8. A stator assembly includes a housing and an iron core. The housing is provided with the cooling flow channel structure according to any one of claims 1 to 7, and the iron core is fixed on the cooling flow channel structure.

9. The stator assembly according to claim 8, wherein, It further includes a barrier member, and the barrier member is installed between the cooling flow channel structure and the iron core.

10. The stator assembly according to claim 8, wherein, An installation hole for fixing the iron core is formed at one end of the shunt portion away from the connecting portion.

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