Heat sink housing and air-cooled motor

Abstract

This application relates to a heat dissipation housing and an air-cooled motor. The heat dissipation housing includes a casing with a first end face and a second end face along the axial direction. The first end face has a plurality of air inlets spaced apart circumferentially, and the second end face has a plurality of air outlets spaced apart circumferentially. It also includes a plurality of heat dissipation fins disposed on the outer periphery of the casing. The plurality of heat dissipation fins are spaced apart circumferentially to form a plurality of air ducts. One end of each air duct is connected to each of the air outlets, and the other end of each air duct is connected to each of the air inlets. The plurality of heat dissipation fins are continuously arranged axially to form a wave-like pattern. In this embodiment, the heat dissipation fins are arranged in a wave-like pattern on the outer wall of the casing. Compared with traditional straight fins, the flow channel area is increased, the path is lengthened, and the heat dissipation efficiency is increased.

Description

Technical Field

[0001] This application relates to the field of motor technology, and in particular to a heat dissipation housing and an air-cooled motor. Background Technology

[0002] Currently, most industrial permanent magnet assisted synchronous motors have a higher power density than asynchronous standard motors, enabling them to achieve more power in the same frame size. Therefore, they require higher performance in terms of heat dissipation. However, the heat dissipation fins of existing synchronous motors are all linear along the axial direction, resulting in a limited contact area with airflow and consequently, limited heat dissipation area and low heat dissipation efficiency. Summary of the Invention

[0003] The purpose of this application is to provide a heat sink housing and an air-cooled motor, which increases the heat dissipation area of ​​the flow channel, thereby improving the heat dissipation efficiency of the heat sink housing.

[0004] In a first aspect, embodiments of this application provide a heat dissipation housing, comprising: a housing having a first end face and a second end face along an axial direction, the first end face having a plurality of air inlets spaced apart circumferentially, and the second end face having a plurality of air outlets spaced apart circumferentially; and a plurality of heat dissipation fins disposed on the outer periphery of the housing, the plurality of heat dissipation fins being spaced apart circumferentially and forming a plurality of air ducts, one end of each air duct being connected to each of the air outlets, and the other end of each air duct being connected to each of the air inlets, the plurality of heat dissipation fins being continuously arranged axially to form a wave-like shape.

[0005] In one embodiment of this application, the width of the air duct decreases along the direction from the first end face toward the second end face.

[0006] In one embodiment of this application, the air ducts formed between the plurality of heat dissipation fins along the same circumference have the same width.

[0007] In one embodiment of this application, along the direction from the first end face toward the second end face, the housing includes: a first distribution area M1, a second distribution area M2, a third distribution area M3, and a fourth distribution area M4; the number of the plurality of heat dissipation fins in the first distribution area M1 is K1, the number of the plurality of heat dissipation fins in the second distribution area M2 is K2, the number of the plurality of heat dissipation fins in the third distribution area M3 is K3, and the number of the plurality of heat dissipation fins in the fourth distribution area M4 is K4; the diameter of the housing is D, wherein D, K1, K2, K3, and K4 satisfy the following condition: K n+1 =K n+6 , where n=1, 2, 3, 4, and K1 is a positive integer after rounding D / 9.5.

[0008] In one embodiment of this application, the orthographic projection of the heat dissipation fins along the axial direction on the first end face is a first projection, and the orthographic projection of the housing core along the axial direction on the first end face is a second projection. The first projection faces the direction of the second projection, and the width of the first projection decreases.

[0009] In one embodiment of this application, the direction of the first projection toward the housing shaft core includes an elliptical surface and an inverted trapezoidal surface, wherein the major axis dimension of the elliptical surface is greater than the dimension of the lower base of the inverted trapezoidal surface.

[0010] In one embodiment of this application, the radial height dimension of the heat dissipation fins is H, and the radial height dimension of the elliptical surface is H1, wherein H, H1 and D satisfy the following conditions: D / 22 < H < D / 17, H1 = 0.3H.

[0011] In one embodiment of this application, the line connecting the orthographic projection of the air inlet end along the axial direction on the first end face and the second projection is the first connecting line, and the corresponding line connecting the orthographic projection of the air outlet end along the axial direction on the first end face and the second projection is the second connecting line. The included angle between the first connecting line and the second connecting line is β, and the diameter of the housing is D. β and D satisfy the following condition: β = -0.5D + 120, where D in the formula is the numerical value of the housing diameter.

[0012] In one embodiment of this application, the angle between any of the air inlet ends and the axial direction is α, and the angle between any of the heat dissipation fins located on the first end face and the axial direction is ρ. α and ρ satisfy the following condition: α = ρ.

[0013] In one embodiment of this application, the air inlet is provided with a fan, and the fan has multiple blades; the included angle α between any of the air inlet and the axial direction satisfies the following relationship: α=N*F*π / 360, where N is the number of blades, F is the outer diameter of the blades, and F in the formula is the value of the outer diameter of the blades.

[0014] Secondly, embodiments of this application also provide an air-cooled motor, including: a first end cover and a second end cover spaced apart along the axial direction; and a heat dissipation housing as described in any of the first aspects, the heat dissipation housing being disposed between the first end cover and the second end cover.

[0015] This application provides a heat dissipation housing, including: a housing having a first end face and a second end face along the axial direction, the first end face having a plurality of air inlets spaced apart circumferentially, and the second end face having a plurality of air outlets spaced apart circumferentially; and a plurality of heat dissipation fins disposed on the outer periphery of the housing, the plurality of heat dissipation fins being spaced apart circumferentially and forming a plurality of air ducts, one end of each air duct being connected to each of the air outlets, and the other end of each air duct being connected to each of the air inlets, the plurality of heat dissipation fins being continuously arranged axially to form a wave-like shape. Multiple heat dissipation fins are spaced circumferentially to form multiple air ducts. Each air duct is connected to an air inlet and an air outlet at both ends, thus forming multiple heat dissipation air ducts. The multiple heat dissipation fins are connected sequentially along the axial direction to form a wave-shaped structure. Compared with the heat dissipation fins of the prior art that are straight along the axial direction, the air duct volume formed by the heat dissipation fins of this application is increased, the path is longer, and the heat dissipation efficiency is improved. As a result, the heat dissipation area and air volume of the heat dissipation casing of this application can also be greatly improved. Without increasing the air volume (or even reducing the air volume), the increased heat exchange area can reduce the power used for heat dissipation of the casing, thereby improving the heat dissipation efficiency, further increasing the wind speed of the air-cooled motor, and reducing the temperature rise of the air-cooled motor. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In addition, in the drawings, the same parts use the same reference numerals, and the drawings are not drawn to scale.

[0017] Figure 1 This diagram shows an exploded view of an air-cooled motor according to an embodiment of this application;

[0018] Figure 2 This is a schematic diagram of the structure of the first end face of a heat dissipation housing provided in an embodiment of this application;

[0019] Figure 3 This diagram shows a structural schematic of the second end face of a heat dissipation housing according to an embodiment of this application;

[0020] Figure 4 This illustration shows a cross-sectional view of a heat dissipation fin provided in an embodiment of this application;

[0021] Figure 5 This application provides an embodiment of the wind speed curves for each distribution area of ​​the heat dissipation fins.

[0022] Figure 6The temperature rise curve of a 15kW air-cooled motor provided in an embodiment of this application is shown.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Second end cover; 2. Junction box base; 3. Housing; 31. First end face; 32. Second end face; 4. First end cover; 5. Fan blade; 6. Fan cover; 7. Heat dissipation fins; 71. Elliptical surface; 72. Inverted trapezoidal surface; 8. Air inlet end; 9. Air outlet end. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] While the linear fins used in traditional permanent magnet assisted synchronous reluctance motors are simple to manufacture, the heat exchange area of ​​the motor is very limited. Furthermore, due to the internal workings and acceleration of airflow within the motor's fan blades, the cooling air often travels at a certain angle when leaving the fan shroud. If straight fins are used, the cooling air will directly impact the fins, causing significant impact losses, and consequently, some of the gas's kinetic energy will be wasted.

[0027] In view of this, the present application provides a heat dissipation housing 3 and an air-cooled motor containing therein. The air-cooled motor includes a first end cover 4 and a second end cover 1 arranged axially at intervals. The heat dissipation housing 3 is disposed between the first end cover 4 and the second end cover 1. The air-cooled motor also includes a junction box seat 2, a fan and a fan cover 6. The junction box seat 2 is disposed on the outer periphery of the heat dissipation housing 3. The fan is disposed at the air inlet of the heat dissipation housing 3, that is, on the side of the first end cover 4 away from the heat dissipation housing 3. The fan has multiple fan blades 5. The fan cover 6 is disposed on the side of the fan blades 5 away from the heat dissipation housing 3.

[0028] Among them, such as Figures 1-4As shown, the heat dissipation housing 3 includes: a housing 3 having a first end face 31 and a second end face 32 along the axial direction, the first end face 31 having a plurality of air inlets 8 spaced apart along the circumferential direction, and the second end face 32 having a plurality of air outlets spaced apart along the circumferential direction; and a plurality of heat dissipation fins 7 disposed on the outer periphery of the housing 3, the plurality of heat dissipation fins 7 being spaced apart along the circumferential direction and forming a plurality of air ducts, one end of each air duct being connected to each air outlet, and the other end of each air duct being connected to each air inlet 8, the plurality of heat dissipation fins 7 being continuously arranged along the axial direction to form a wave-like shape. Multiple heat dissipation fins 7 are spaced apart circumferentially to form multiple air ducts. Each air duct is connected to an air inlet 8 and an air outlet at both ends, thus forming multiple heat dissipation air ducts. The multiple heat dissipation fins 7 are connected sequentially along the axial direction to form a wave-shaped structure. Compared with the heat dissipation fins 7 of the prior art that are straight along the axial direction, the air duct volume formed by the heat dissipation fins 7 of this application is increased, the path is longer, and the heat dissipation efficiency is improved. As a result, the heat dissipation area and air volume of the heat dissipation housing 3 of this application can also be greatly improved. Without increasing the air volume (or even reducing the air volume), the heat exchange area is increased, which can reduce the power used for heat dissipation of the housing 3, thereby improving the heat dissipation efficiency, further increasing the wind speed of the air-cooled motor, and reducing the temperature rise of the air-cooled motor.

[0029] Please refer to Figures 5-6 As shown, the technical solution in this embodiment increases the wind speed by about 49.5% and reduces the temperature rise by about 6k compared to the original technical solution, resulting in a significant improvement in heat dissipation performance.

[0030] The housing 3 has an extended shaft end and a non-extended shaft end along the axial direction. As the name suggests, the extended shaft end is the end of the central shaft that is exposed, and the non-extended shaft end is the end of the central shaft that is located inside the housing 3. For ease of assembly, the non-extended shaft end is connected to the first end cover 4, and the extended shaft end is connected to the second end cover 1.

[0031] The heat dissipation housing 3 of this embodiment will be described below with the first end face 31 being the non-shaft extension end and the second end face 32 being the shaft extension end as an example:

[0032] Furthermore, the width of the air duct decreases along the direction from the first end face 31 toward the second end face 32.

[0033] This embodiment sets up a variable air duct outside the housing 3, that is, from the first end face 31 to the second end face 32, the number and width of the heat dissipation fins 7 are constantly changing. According to the actual situation of the air-cooled motor, the number of heat dissipation fins 7 increases in this embodiment, while the width of the air duct narrows, so the airflow to the second end face 32 is accelerated. Compared with straight fins, the resistance of the airflow in the air duct is reduced. Secondly, the air is accelerated in the air duct, and finally a low-pressure area is formed near the second end face 32, thereby increasing the air intake from the air inlet 8, thereby further improving the heat dissipation effect. This solves the technical problem in the prior art where the number and width of the heat dissipation fins 7 are always consistent from the non-shaft extension end to the shaft extension end of the motor, the air velocity in the air duct decreases quickly, resulting in a high temperature rise at the shaft extension end.

[0034] Please continue to refer to this. Figures 1-3 As shown, in this embodiment, the air ducts formed between the multiple heat dissipation fins 7 along the same circumference have the same width, thereby ensuring uniform heat dissipation at all points along the same circumference and ensuring the stability and uniformity of heat dissipation and cooling of the air-cooled fan.

[0035] For example, such as Figure 2 As shown, along the direction from the first end face 31 toward the second end face 32, the housing 3 includes: a first distribution area M1, a second distribution area M2, a third distribution area M3, and a fourth distribution area M4; the number of the plurality of heat dissipation fins 7 in the first distribution area M1 is K1, the number of the plurality of heat dissipation fins 7 in the second distribution area M2 is K2, the number of the plurality of heat dissipation fins 7 in the third distribution area M3 is K3, and the number of the plurality of heat dissipation fins 7 in the fourth distribution area M4 is K4; the diameter of the housing 3 is D, wherein D, K1, K2, K3, and K4 satisfy the following condition: K n+1 =K n +6, where n=1, 2, 3, 4, and K1 is a positive integer after rounding D / 9.5. Each heat dissipation fin 7 is evenly distributed in the first distribution area M1, the second distribution area M2, the third distribution area M3, and the fourth distribution area M4, and the width of the air duct varies according to the number of heat dissipation fins 7 in the first distribution area M1, the second distribution area M2, the third distribution area M3, and the fourth distribution area M4.

[0036] Furthermore, the orthographic projection of the heat dissipation fins 7 along the axial direction onto the first end face 31 is the first projection, and the orthographic projection of the shaft core of the housing 3 along the axial direction onto the first end face 31 is the second projection. The first projection faces the direction of the second projection, and the width of the first projection decreases. That is, the width of the heat dissipation fins 7 decreases from top to bottom, while the width of the air duct increases from top to bottom. This reduces the loss of airflow to the outside and increases airflow guidance to a certain extent. It also improves the technical problem of the existing heat dissipation fins 7 having an "n-shaped" cross-sectional shape, where most of the airflow escapes to the outside of the air duct, resulting in a significant loss of total airflow.

[0037] Furthermore, such as Figure 4 As shown, the first projection, facing the axis of the housing 3, sequentially includes an elliptical surface 71 and an inverted trapezoidal surface 72, with the major axis of the ellipse being larger than the lower base of the inverted trapezoidal surface 72. Each heat dissipation fin 7 has a radial cross-section consisting of an upper elliptical surface 71 and a lower inverted trapezoidal surface 72, further increasing the contact area between the heat dissipation fin 7 and the air inside the air duct. This reduces airflow loss to the outside, maximizes the amount of cooling air passing through the air duct, further reduces total airflow loss, and improves airflow guidance.

[0038] In some embodiments, the radial height of the heat dissipation fins 7 is H, and the radial height of the elliptical surface 71 is H1, wherein H, H1, and D satisfy the following conditions: D / 22 < H < D / 17, and H1 = 0.3H. Through the above settings, the height of the elliptical surface 71 can be guaranteed to be 30% of the overall height of the heat dissipation fins 7, thereby increasing the ventilation volume within the air duct while ensuring the stability of the heat dissipation fins 7.

[0039] like Figure 3 As shown, for the angle between the air inlet end 8 and the air outlet end of the same air duct, the line connecting the orthographic projection of the air inlet end 8 along the axial direction on the first end face 31 and the second projection is the first line, and the corresponding line connecting the orthographic projection of the air outlet end along the axial direction on the first end face 31 and the second projection is the second line. The included angle between the first line and the second line is β (that is, the included angle between the projection point B of the air inlet end 8 on the second end face 32 of the housing 3 and the air inlet end 8C of the housing 3). The diameter of the housing 3 is D, where β and D satisfy the following condition: β = -0.5D + 120; where D in the formula is the numerical value of the housing diameter.

[0040] Furthermore, the angle between any of the air inlet ends 8 and the axial direction is α, and the angle between any of the heat dissipation fins 7 located on the first end face 31 and the axial direction is ρ. α and ρ satisfy the following condition: α = ρ. The tilt angle of the air inlet end 8 is consistent with the tilt angle of the heat dissipation fins 7 of the air inlet end 8, which is more conducive to the inflow of external air and has better heat dissipation performance. This solves the problem that the existing air inlet end 8 is set along the axial direction, but the actual air inlet direction is at a certain angle to the axial direction, which reduces the amount of external airflow. Moreover, the avoidance of airflow into the heat dissipation fins 7 will lead to wind damage, which is not conducive to better heat dissipation.

[0041] Specifically, the air inlet 8 is equipped with a fan, and the fan has multiple fan blades 5; the included angle α between any of the air inlet 8 and the axial direction satisfies the following relationship: α=N*F*π / 360, where N is the number of fan blades 5, F is the outer diameter of fan blades 5, and F in the formula is the value of the outer diameter of the fan blade.

[0042] As an example, when the power of the permanent magnet assisted synchronous motor is 15kW, the diameter D of the housing 3 is 224mm, the angle β of the heat dissipation fins 7 on the surface of the housing 3 is 8°, the radial height H of the heat dissipation fins 7 is 12.5mm, the number of heat dissipation fins 7 distributed in the first distribution area is 24, the number of heat dissipation fins 7 distributed in the second distribution area is 30, the number of heat dissipation fins 7 distributed in the third distribution area is 36, and the number of heat dissipation fins 7 distributed in the fourth distribution area is 42. The outer diameter N of the fan blades 5 is 185mm, the number of fan blades 5 is 7, and the air inlet angle α is 11.3°. The maximum thickness T of each heat dissipation fin 7 (i.e., the major axis dimension of the elliptical surface 71) is 3mm, and the angle θ between the bottom of the inverted trapezoidal surface 72 and the tangent to the surface of the housing 3 is 30°.

[0043] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0044] It should be readily understood that “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on something” but also “on something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0045] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A heat dissipating enclosure, characterized by, Comprising: a casing having a first end face and a second end face in an axial direction, a plurality of air inlet ends being spaced apart in a circumferential direction on the first end face, and a plurality of air outlet ends being spaced apart in the circumferential direction on the second end face; and a plurality of heat dissipation fins arranged on an outer periphery of the casing, the plurality of heat dissipation fins being spaced apart in the circumferential direction and forming a plurality of air channels, each of the air channels being in communication with each of the air outlet ends at one end and in communication with each of the air inlet ends at the other end, and the plurality of heat dissipation fins being arranged continuously in the axial direction to form a wave shape; a second projection of an axial core of the casing in the axial direction on the first end face is a normal projection of the axial core of the casing on the first end face; a first connecting line between a normal projection of the air inlet end in the axial direction on the first end face and the second projection, and a second connecting line between a normal projection of the corresponding air outlet end in the axial direction on the first end face and the second projection, form an angle β between the first connecting line and the second connecting line, and a diameter D of the casing, wherein β and D satisfy the following condition: β = -0.5D + 120, wherein D in the formula is a numerical value of the diameter of the casing.

2. The heat dissipating enclosure of claim 1, wherein, A width of the air channel decreases in a direction from the first end face to the second end face.

3. The heat dissipating enclosure according to claim 1 or 2, wherein The width of the air channel formed between the plurality of heat dissipation fins along the same circumference is the same.

4. The heat dissipating enclosure of claim 3, wherein, In the direction from the first end face to the second end face, the casing comprises a first distribution area M1, a second distribution area M2, a third distribution area M3, and a fourth distribution area M4. The number of the plurality of heat dissipation fins of the first distribution area M1 is K1, the number of the plurality of heat dissipation fins of the second distribution area M2 is K2, the number of the plurality of heat dissipation fins of the third distribution area M3 is K3, the number of the plurality of heat dissipation fins of the fourth distribution area M4 is K4, and the diameter of the shell is D, wherein D, K1, K2, K3, and K4 satisfy the following conditions: K n+1 = K n+6 wherein n = 1, 2, 3, 4, and K1 is a positive integer after rounding D / 9.

5.

5. The heat dissipating enclosure of claim 1, wherein, A first projection of the heat dissipation fin in the axial direction on the first end face decreases in width in a direction toward the second projection.

6. The heat dissipating enclosure of claim 5, wherein, The first projection in the direction toward the axial core of the casing comprises an elliptical face and an inverted trapezoidal face, and a long axis dimension of the elliptical face is greater than a lower base dimension of the inverted trapezoidal face.

7. The heat dissipating enclosure of claim 6, wherein, A height dimension of the heat dissipation fin in a radial direction is H, and a height dimension of the elliptical face in the radial direction is H1, wherein H, H1, and D satisfy the following condition: D / 22 < H < D / 17, and H1 = 0.3H.

8. The heat dissipating enclosure of claim 1, wherein, An angle α between any air inlet end and an axial direction, and an angle ρ between any heat dissipation fin on the first end face and the axial direction satisfy the following condition: α = ρ.

9. The heat dissipating enclosure of claim 1, wherein, The air inlet end is provided with a fan, and the fan has a plurality of fan blades. An angle α between any air inlet end and an axial direction satisfies the following relationship: α = N*F*π / 360, wherein N is the number of fan blades, and F is an outer diameter of the fan blade, and F in the formula is a numerical value of the outer diameter of the fan blade.

10. A fan-cooled electric machine characterized by, Comprising: a first end cover and a second end cover arranged in an axial direction; and The heat dissipation casing according to any one of claims 1-9 is arranged between the first end cover and the second end cover.

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