Axial magnetic field motor cooling structure and axial magnetic field motor

Abstract

The utility model provides an axial magnetic field motor cooling structure and an axial magnetic field motor, comprising: a stator assembly, wherein the stator assembly comprises a stator shell, wherein the stator shell is surrounded by a stator inner cavity and a heat dissipation cavity located outside the stator inner cavity, wherein the stator inner cavity is used to accommodate stator windings, and both the heat dissipation cavity and the stator inner cavity are provided with a heat exchange medium; and a medium circulation drive device is used to drive the heat exchange medium to circulate between the heat dissipation cavity and the stator inner cavity. The utility model adds a heat exchange medium heat dissipation method on the basis of traditional air cooling, thereby improving the heat exchange effect, being able to meet the needs of high power and high torque output, and directly provides a heat dissipation cavity on the stator shell, without the need for an additional radiator, making the weight of the axial magnetic field motor lighter.

Description

Technical Field

[0001] The utility model belongs to the technical field of disc motors, and particularly relates to an axial magnetic field motor cooling structure and an axial magnetic field motor. Background Art

[0002] Axial magnetic field motors, also known as disc motors, are gaining more and more attention due to their compact structure, high efficiency, and high power density. Disc motors are particularly suitable for applications that require high torque density and compact space, such as aircraft, electric vehicles, renewable energy systems, gear energy storage systems, and industrial equipment.

[0003] Due to the compact structure of the disc motor, its heat dissipation is difficult to meet the needs of high power and high torque output, especially the drive motor used in aircraft, which is smaller in size and lighter in weight. The heat dissipation of the motor is mainly through air convection heat transfer, and the heat exchange efficiency between the stator winding and the air is poor. It can only meet the needs of small aircraft, but cannot meet the needs of large aircraft.

[0004] Therefore, how to improve the heat dissipation effect to meet the needs of high power and high torque output is an urgent problem to be solved by technical personnel in this field. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide an axial magnetic field motor cooling structure to improve the heat dissipation effect to meet the needs of high power and high torque output;

[0006] Another object of the present invention is to provide an axial magnetic field motor having the above-mentioned axial magnetic field motor cooling structure.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] An axial magnetic field motor cooling structure, comprising:

[0009] A stator assembly, the stator assembly comprising a stator housing, the stator housing enclosing a stator inner cavity and a heat dissipation cavity located outside the stator inner cavity, the stator inner cavity being used to accommodate a stator winding, and a heat exchange medium being arranged in the heat dissipation cavity and the stator inner cavity;

[0010] The medium circulation driving device is used to drive the heat exchange medium to circulate between the heat dissipation cavity and the stator inner cavity.

[0011] Optionally, in the above-mentioned axial magnetic field motor cooling structure, the heat dissipation cavity is provided with a medium inlet, the stator inner cavity is provided with a medium outlet, and the heat dissipation cavity and the stator inner cavity are connected through a medium return port;

[0012] The inlet end of the medium circulation driving device is communicated with the medium outlet, and the outlet end of the medium circulation driving device is communicated with the medium inlet.

[0013] Optionally, in the above-mentioned axial magnetic field motor cooling structure, a partition is provided in the heat dissipation cavity to separate the medium inlet and the medium return port;

[0014] The arc formed by the medium inlet and the medium return port and centered at the axis of the stator assembly is an opening arc, and the central angle of the opening arc is smaller than the preset central angle.

[0015] Optionally, in the above axial magnetic field motor cooling structure, the stator housing comprises:

[0016] A stator housing, wherein the heat dissipation cavity is arranged in the stator housing;

[0017] A stator inner shell, disposed on the inner side of the stator outer shell and coaxially arranged with the stator outer shell;

[0018] There are two stator seals arranged in parallel, and the outer side of the stator seal is sealed to the stator outer shell, and the inner side of the stator seal is sealed to the stator inner shell. The stator outer shell, the stator inner shell and the two stator seals enclose the stator inner cavity.

[0019] Optionally, in the above-mentioned axial magnetic field motor cooling structure, the inner wall of the stator housing is provided with a seal mounting rib, and the outer side of the stator seal is fixed to the seal mounting rib;

[0020] The opening ends of the medium inlet and the medium outlet are both located at the sealing member mounting rib.

[0021] Optionally, in the above axial magnetic field motor cooling structure, the stator housing comprises:

[0022] A heat dissipation cavity outer wall and a heat dissipation cavity inner wall, wherein the heat dissipation cavity is formed between the heat dissipation cavity outer wall and the heat dissipation cavity inner wall;

[0023] The heat dissipation fins are arranged on a side of the outer wall of the heat dissipation cavity facing away from the heat dissipation cavity.

[0024] Optionally, in the above-mentioned axial magnetic field motor cooling structure, heat dissipation ribs are provided on at least one of the outer wall of the heat dissipation cavity and the inner wall of the heat dissipation cavity, and the heat dissipation ribs are multiple and arranged at intervals in the heat dissipation cavity.

[0025] Optionally, in the above-mentioned axial magnetic field motor cooling structure, the heat dissipation rib is provided with a dielectric through hole penetrating the wall thickness; and / or,

[0026] The heat dissipation rib is connected to one of the outer wall of the heat dissipation cavity and the inner wall of the heat dissipation cavity, and has a medium passing gap between the heat dissipation rib and the other one.

[0027] Optionally, in the above axial magnetic field motor cooling structure, the heat exchange medium is cooling oil; and / or,

[0028] The medium circulation driving device is a circulation pump.

[0029] The cooling structure of the axial magnetic field motor provided by the utility model adds a heat dissipation cavity on the stator housing, and the heat dissipation cavity is located on the outside of the stator inner cavity, and a heat exchange medium is arranged in the heat dissipation cavity and the stator inner cavity. The stator winding in the stator inner cavity will generate a large amount of heat during operation, and this heat is transferred to the heat exchange medium in the stator inner cavity, so that the heat exchange medium is heated. The medium circulation drive device can transport the heated heat exchange medium in the stator inner cavity to the heat dissipation cavity, and use the side wall of the heat dissipation cavity to dissipate the heat of the heat exchange medium to the surrounding atmosphere; at the same time, the heat exchange medium cooled in the heat dissipation cavity flows back to the stator inner cavity to continue to exchange heat with the stator winding. The utility model adds a heat dissipation method of the heat exchange medium on the basis of traditional air cooling, improves the heat exchange effect, can meet the needs of high power and high torque output, and directly arranges the heat dissipation cavity on the stator housing, without the need to additionally arrange a radiator, so that the weight of the axial magnetic field motor is lighter.

[0030] An axial magnetic field motor comprises an axial magnetic field motor cooling structure as described above, wherein the stator assembly is provided with motor end covers on both sides along the axial direction, one of the motor end covers is provided with a drive device fixing, and the medium circulation drive device is fixed on the drive device fixing.

[0031] The axial magnetic field motor provided by the utility model has all the technical effects of the above-mentioned axial magnetic field motor cooling structure, and will not be described in detail herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the utility model 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, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0033] Figure 1 A schematic diagram of the structure of an axial magnetic field motor with an angle provided by an embodiment of the utility model;

[0034] Figure 2 A schematic diagram of the structure of an axial magnetic field motor at another angle provided by an embodiment of the utility model;

[0035] Figure 3 A schematic structural diagram of a stator assembly at an angle provided by an embodiment of the utility model;

[0036] Figure 4 A schematic structural diagram of a stator assembly from another angle provided by an embodiment of the utility model;

[0037] Figure 5 A schematic diagram of the structure of the motor end cover provided by an embodiment of the utility model;

[0038] Figure 6 A schematic diagram of the partial structure of the motor end cover provided by the embodiment of the utility model;

[0039] Figure 7 A schematic diagram of the structure of a stator housing provided in an embodiment of the utility model;

[0040] Figure 8 A schematic diagram of the partial structure of a stator housing provided in an embodiment of the utility model.

[0041] The meanings of the reference numerals in the figures are as follows:

[0042] 100-stator housing; 101-heat dissipation fins; 102-seal mounting rib; 1021-medium inlet; 1022-medium outlet; 1023-medium return port; 103-heat dissipation cavity; 104-heat dissipation cavity outer wall; 105-heat dissipation cavity inner wall; 106-heat dissipation ribs;

[0043] 200-motor end cover; 201-driving device fixing piece; 2011-fastener mounting portion; 202-first end cover hole; 203-second end cover hole;

[0044] 300-Medium circulation drive device;

[0045] 400- stator inner shell;

[0046] 500 - first stator seal; 501 - first seal medium hole; 502 - second seal medium hole; 600 - second stator seal; DETAILED DESCRIPTION

[0047] The core of the utility model is to provide an axial magnetic field motor cooling structure to improve the heat dissipation effect to meet the needs of high power and high torque output;

[0048] Another core of the utility model is to provide an axial magnetic field motor with the above-mentioned axial magnetic field motor cooling structure.

[0049] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0050] The current axial magnetic field motor has a relatively compact structure and mainly dissipates heat through air convection. The air-cooled heat dissipation method is difficult to meet the requirements of high power and high torque output of the axial magnetic field motor. Based on this, the embodiment of the utility model discloses an axial magnetic field motor cooling structure. The axial magnetic field motor cooling structure can have a better heat dissipation efficiency while maintaining a compact structure to meet the requirements of high power and high torque output.

[0051] like Figure 1 , Figure 2 and Figure 8 As shown, the axial magnetic field motor cooling structure disclosed in the embodiment of the utility model includes a stator assembly and a medium circulation driving device 300.

[0052] The stator assembly includes a stator shell, which is surrounded by a stator inner cavity and a heat dissipation cavity 103 located outside the stator inner cavity. The stator inner cavity is used to accommodate the stator winding, and heat exchange medium is provided in the heat dissipation cavity 103 and the stator inner cavity. The heat of the axial magnetic field motor comes from the stator winding. The heat exchange medium in the stator inner cavity is used to absorb the heat generated by the stator winding to achieve the technical effect of reducing the heat of the stator winding. The heat exchange medium is directly poured into the stator inner cavity, the heat exchange medium is in direct contact with the stator winding, and the heat of the stator winding is introduced into the heat exchange medium, so that the temperature of the heat exchange medium increases.

[0053] Those skilled in the art can understand that the heat dissipation cavity 103 is closer to the outside of the stator housing than the stator inner cavity, that is, closer to the external atmosphere, and the heat exchange medium in the heat dissipation cavity 103 can quickly exchange heat with the external atmosphere through the stator housing. The heat exchange medium with a higher temperature in the stator inner cavity can flow into the heat dissipation cavity 103 to dissipate the heat, and the heat exchange medium after heat dissipation and cooling flows back into the stator inner cavity to exchange heat with the stator winding.

[0054] In order to speed up the flow of the heat exchange medium between the heat dissipation cavity 103 and the stator inner cavity, a medium circulation driving device 300 can be added, and the medium circulation driving device 300 can drive the heat exchange medium to circulate between the heat dissipation cavity 103 and the stator inner cavity. It should be noted that the heat exchange medium in this embodiment can be cooling oil, and can also be designed as other liquid cooling media according to needs. The medium circulation driving device 300 can be a circulation pump, or other equipment that can assist the flow of the heat exchange medium.

[0055] In summary, the cooling structure of the axial magnetic field motor provided by the utility model adds a heat dissipation cavity 103 on the stator housing, and the heat dissipation cavity 103 is located outside the stator inner cavity, and a heat exchange medium is arranged in the heat dissipation cavity 103 and the stator inner cavity. The stator winding in the stator inner cavity will generate a large amount of heat during operation, and this heat is transferred to the heat exchange medium in the stator inner cavity, so that the heat exchange medium is heated. The medium circulation drive device 300 can transport the heat exchange medium heated in the stator inner cavity to the heat dissipation cavity 103, and use the side wall of the heat dissipation cavity 103 to dissipate the heat of the heat exchange medium to the surrounding atmosphere; at the same time, the heat exchange medium cooled in the heat dissipation cavity 103 flows back to the stator inner cavity to continue to exchange heat with the stator winding. The utility model adds a heat dissipation method of the heat exchange medium on the basis of traditional air cooling, improves the heat exchange effect, can meet the needs of high power and high torque output, and directly arranges the heat dissipation cavity 103 on the stator housing, without the need to set up an additional radiator, so that the weight of the axial magnetic field motor is lighter.

[0056] like Figure 7 and Figure 8 As shown, the heat dissipation cavity 103 is provided with a medium inlet 1021, and the stator inner cavity is provided with a medium outlet 1022. The medium inlet 1021 is a channel for the heated heat exchange medium to enter the heat dissipation cavity 103, and the medium outlet 1022 is a channel for the heated heat exchange medium to flow out of the stator inner cavity.

[0057] The heat dissipation cavity 103 and the stator inner cavity are connected through the medium return port 1023 , and the medium return port 1023 is a passage for the heat exchange medium to enter the stator inner cavity after dissipating heat and cooling down in the heat dissipation cavity 103 .

[0058] The inlet end of the medium circulation driving device 300 is communicated with the medium outlet 1022, and the outlet end of the medium circulation driving device 300 is communicated with the medium inlet 1021. The inlet end of the medium circulation driving device 300 can be communicated with the medium outlet 1022 through a corresponding pipeline or a channel provided on the structure, so that under the negative pressure of the medium circulation driving device 300, the heat exchange medium heated in the stator inner cavity can enter the medium circulation driving device 300 through the medium outlet 1022.

[0059] The outlet end of the medium circulation driving device 300 can be connected to the medium inlet 1021 through a corresponding pipeline or a channel arranged on the structure, so that the heat exchange medium entering the medium circulation driving device 300 enters the heat dissipation cavity 103 through the medium inlet 1021. The heat exchange medium pumped into the heat dissipation cavity 103 by the medium circulation driving device 300 is the heat exchange medium heated by the stator winding. The high-temperature heat exchange medium in the heat dissipation cavity 103 accelerates heat dissipation with the surrounding atmosphere through the side wall of the heat dissipation cavity 103, so that the temperature of the heat exchange medium is reduced. When the high-temperature heat exchange medium is pumped into the heat dissipation cavity 103 by the medium circulation driving device 300, the medium pressure in the heat dissipation cavity 103 increases, and the heat exchange medium after cooling flows back to the stator inner cavity through the medium return port 1023 to continue to exchange heat with the stator winding.

[0060] The medium inlet 1021 is a channel for the heat exchange medium to enter the heat dissipation cavity 103, and the medium return port 1023 is a channel for the heat exchange medium to flow out of the heat dissipation cavity 103. It can be understood by those skilled in the art that the positions of the medium inlet 1021 and the medium return port 1023 need to be specially designed to prevent the heat exchange medium from flowing out of the heat dissipation cavity 103 in a shorter path, which fails to exert the heat dissipation effect of the heat dissipation cavity 103. The heat dissipation cavity 103 is an annular structure surrounding the inner cavity of the stator. In an ideal state, the heat exchange medium flowing into the heat dissipation cavity 103 should flow out of the heat dissipation cavity 103 after a circle, so as to obtain the maximum heat dissipation path, increase the contact area between the heat exchange medium and the inner wall of the heat dissipation cavity 103 during the entire circulation process, and then obtain a better heat dissipation efficiency.

[0061] like Figure 7 As shown, in this embodiment, in order to obtain a longer heat dissipation path, it is usually necessary to arrange the medium inlet 1021 and the medium return port 1023 adjacently. It can be understood by those skilled in the art that the closer the medium inlet 1021 and the medium return port 1023 are, the closer the heat dissipation path obtained is to a circle. After the medium inlet 1021 and the medium return port 1023 are arranged adjacently, the heat exchange medium can flow from the medium inlet 1021 to the medium return port 1023 through a longer path, or from the medium inlet 1021 to the medium return port 1023 through a shorter path, wherein the longer path and the shorter path constitute a circle of the heat dissipation cavity 103.

[0062] In order to prevent the heat exchange medium entering the heat dissipation cavity 103 from the medium inlet 1021 from directly flowing out through the medium return port 1023 along a shorter path, in this embodiment, a partition is provided in the heat dissipation cavity 103 to separate the medium inlet 1021 from the medium return port 1023. It can be understood by those skilled in the art that the partition should be provided on the shorter path between the medium inlet 1021 and the medium return port 1023 of the heat dissipation cavity 103 to prevent the heat exchange medium from directly flowing from the medium inlet 1021 to the medium return port 1023 along the shorter path, and can only flow from the medium inlet 1021 to the medium return port 1023 along the longer path.

[0063] For ease of understanding, the arc surrounded by the medium inlet 1021 and the medium return port 1023 with the axis of the stator assembly as the center is defined as the opening arc. In order to enable those skilled in the art to understand how the medium inlet 1021 and the medium return port 1023 are arranged adjacent to each other, in this embodiment, the center angle of the opening arc is set to be smaller than the preset center angle. It should be noted that the preset center angle can be set to 10°, 20°, etc. Taking 10° as an example, the center angle corresponding to the shorter arc between the medium inlet 1021 and the medium return port 1023 should be less than 10°, and the center angle corresponding to the longer arc between the medium inlet 1021 and the medium return port 1023 should be greater than 350°. It can be understood by those skilled in the art that if there is no interference problem at the opening position, the medium inlet 1021 and the medium return port 1023 should be designed as close as possible. The design of the above-mentioned preset center angle is not limited to the above-mentioned example, and those skilled in the art can calibrate according to actual needs and the structural characteristics of the corresponding motor.

[0064] Those skilled in the art can understand that the medium inlet 1021 and the medium return port 1023 can also be evenly arranged along the center of the heat dissipation cavity 103, that is, the medium inlet 1021 and the medium return port 1023 are arranged at intervals of 180°. In this way, a splitter plate can be arranged in the heat dissipation cavity 103 corresponding to the medium inlet 1021, and the splitter plate can divide the heat exchange medium entering the heat dissipation cavity 103 from the medium inlet 1021 into two streams, and the two streams of heat exchange medium flow to the medium return port 1023 in a clockwise direction and a counterclockwise direction, respectively. It can also be understood that the heat exchange medium has a larger contact area with the inner wall of the heat dissipation cavity 103, and a better heat dissipation effect is obtained.

[0065] like Figure 3 and Figure 4As shown, in this embodiment, the stator housing includes a stator outer shell 100, a stator inner shell 400 and a stator seal. The heat dissipation cavity 103 is arranged on the stator outer shell 100, the stator inner shell 400 is arranged on the inner side of the stator outer shell 100 and is coaxially arranged with the stator outer shell 100, and there are two stator seals arranged in parallel. For ease of understanding, the two stator seals are respectively a first stator seal 500 and a second stator seal 600.

[0066] The outer side of the stator seal is sealed to the stator outer shell 100 , and the inner side of the stator seal is sealed to the stator inner shell 400 . The stator outer shell 100 , the stator inner shell 400 and the two stator seals form a stator inner cavity.

[0067] Further, such as Figure 7 As shown, the inner wall of the stator housing 100 is provided with a seal mounting rib 102, and the outer side of the stator seal is fixed to the seal mounting rib 102. The width of the seal mounting rib 102 can be designed according to the requirements, as long as it can support the stator seal and facilitate the fastening and sealing of the stator seal and the seal mounting rib 102. The position of the seal mounting rib 102 determines that it is located close to the heat dissipation cavity 103 and the stator inner cavity.

[0068] In this embodiment, the opening ends of the medium inlet 1021 and the medium outlet 1022 are both located on the seal mounting rib 102 to facilitate communication with the medium circulation driving device 300. Those skilled in the art can understand that the seal mounting rib 102 needs to be connected to the stator seal, and corresponding openings need to be provided at positions corresponding to the medium inlet 1021 and the medium outlet 1022 so that the medium circulation driving device 300 can be communicated with the medium inlet 1021 and the medium outlet 1022.

[0069] like Figure 3 As shown, taking the example that the opening ends of the medium inlet 1021 and the medium outlet 1022 are located on the side facing the first stator seal 500, it is necessary to open a first seal medium hole 501 and a second seal medium hole 502 that penetrate the wall thickness on the first stator seal 500, wherein the first seal medium hole 501 is connected to the medium inlet 1021, and the second seal medium hole 502 is connected to the medium outlet 1022.

[0070] like Figure 7 and Figure 8 As shown, in order to enable the stator housing 100 to dissipate heat more quickly, in this embodiment, the stator housing 100 includes a heat dissipation cavity outer wall 104 , a heat dissipation cavity inner wall 105 and heat dissipation fins 101 .

[0071] The heat dissipation cavity outer wall 104 is located outside the heat dissipation cavity inner wall 105, the two are coaxially arranged, and the heat dissipation cavity 103 is formed between the heat dissipation cavity outer wall 104 and the heat dissipation cavity inner wall 105. It can be understood by those skilled in the art that the cross-sectional shape of the heat dissipation cavity 103 is affected by the shapes of the heat dissipation cavity outer wall 104 and the heat dissipation cavity inner wall 105. The present embodiment does not limit the shape of the heat dissipation cavity outer wall 104 located on the heat dissipation cavity inner wall 105. Those skilled in the art can design the shape of the heat dissipation cavity outer wall 104 located on the heat dissipation cavity inner wall 105 according to the required shape of the heat dissipation cavity 103.

[0072] The heat dissipation fins 101 are arranged on the side of the heat dissipation cavity outer wall 104 facing away from the heat dissipation cavity 103. A plurality of heat dissipation fins 101 arranged at intervals are arranged on the outside of the heat dissipation cavity outer wall 104, and the space between any two adjacent heat dissipation fins 101 forms a ventilation duct. In practical applications, for example, when the axial magnetic field motor is applied to an aircraft, the strong convection wind formed when the aircraft is flying can be used to utilize the heat dissipation fins 101 and the ventilation ducts between the heat dissipation fins 101 to accelerate the transfer of heat carried by the heat exchange medium in the heat dissipation cavity 103 to the surrounding air.

[0073] Figure 8 In the illustrated solution, the heat sink 101 is S-shaped, so that the heat sink 101 can obtain a larger heat dissipation area without occupying a larger radial space. It can be understood by those skilled in the art that the shape of the heat sink 101 is not limited to the S-shape, and can also be bent into other shapes, so that the heat sink 101 not only extends in the radial direction, but also extends in other directions by bending, so as to occupy a smaller space in the radial direction, so that the size of the axial magnetic field motor is not significantly increased, and a larger heat exchange area can be obtained by using the shape design of the heat sink 101 to obtain a better heat dissipation effect.

[0074] In order to further improve the heat dissipation effect of the stator housing 100, in this embodiment, at least one of the heat dissipation cavity outer wall 104 and the heat dissipation cavity inner wall 105 is provided with heat dissipation ribs 106, and the heat dissipation ribs 106 are multiple and are arranged at intervals in the heat dissipation cavity 103. In this embodiment, the heat dissipation ribs 106 are provided in the heat dissipation cavity 103, which can increase the contact area with the heat exchange medium, so that more heat of the heat exchange medium is transferred to the stator housing 100, and finally the heat is transferred to the surrounding air under the action of wind.

[0075] In addition, the heat dissipation ribs 106 are provided in the heat dissipation cavity 103, which will inevitably block the heat exchange medium, thereby affecting the flow rate of the heat exchange medium in the heat dissipation cavity 103, so that the flow rate of the heat exchange medium is reduced. The heat exchange medium flows in the heat dissipation cavity 103 for a longer time before flowing out of the heat dissipation cavity 103, so more heat can be transferred to the stator housing 100, and finally the heat is dissipated to the surrounding air under the action of wind.

[0076] In this embodiment, the heat dissipation rib 106 is provided with a medium through hole that penetrates the wall thickness, so that the heat exchange medium can pass through the medium through hole on the heat dissipation rib 106 and pass through the heat dissipation rib 106, thereby preventing the heat dissipation rib 106 from blocking the flow of the heat exchange medium. The position and number of the medium through holes can be designed by those skilled in the art according to requirements.

[0077] Of course, the heat dissipation rib 106 may not have a medium through hole that penetrates the wall thickness, as long as the heat exchange medium can pass through the heat dissipation rib 106. For example, the heat dissipation rib 106 is connected to one of the heat dissipation cavity outer wall 104 and the heat dissipation cavity inner wall 105, and there is a medium passing gap between the heat dissipation rib 106 and the other, that is, the heat exchange medium can pass through the heat dissipation rib 106 through the medium passing gap.

[0078] Both the outer wall 104 and the inner wall 105 of the heat dissipation cavity can be provided with heat dissipation ribs 106, and the heat dissipation ribs 106 on the outer wall 104 and the inner wall 105 of the heat dissipation cavity are arranged alternately, and a medium passing gap is provided between the heat dissipation ribs 106 on the outer wall 104 of the heat dissipation cavity and the inner wall 105 of the heat dissipation cavity; correspondingly, a medium passing gap is provided between the heat dissipation ribs 106 on the inner wall 105 of the heat dissipation cavity and the outer wall 104 of the heat dissipation cavity. With such an arrangement, the heat dissipation medium flows in a serpentine shape when flowing in the heat dissipation cavity 103, thereby extending the flow path of the heat exchange medium and further improving the heat exchange efficiency.

[0079] The utility model also discloses an axial magnetic field motor, which includes the axial magnetic field motor cooling structure disclosed in the above embodiment, and the stator assembly is provided with motor end covers 200 on both sides along the axial direction. Figure 5 and Figure 6 As shown, a drive device fixing part 201 is provided on one of the motor end covers 200, and the medium circulation drive device 300 is fixed on the drive device fixing part 201. The drive device fixing part 201 can be a sleeve structure, and the medium circulation drive device 300 is sleeved in the hole of the drive device fixing part 201, and a fastener mounting part 2011 is provided on the end surface of the opening side of the drive device fixing part 201, and the medium circulation drive device 300 can be locked on the fastener mounting part 2011 by the fastener.

[0080] It will be understood by those skilled in the art that, since the medium circulation drive device 300 is fixed on the motor end cover 200, the motor end cover 200 needs to cover the stator seal, which will inevitably block the holes on the stator seal (for example, the first seal medium hole 501 and the second seal medium hole 502 on the first stator seal 500), affecting the connectivity of the medium circulation drive device 300. It is necessary to open a first end cover hole 202 and a second end cover hole 203 on the motor end cover 200, the first end cover hole 202 is connected to the first seal medium hole 501, and the second end cover hole 203 is connected to the second seal medium hole 502.

[0081] The axial magnetic field motor provided by the utility model has all the technical effects of the above-mentioned axial magnetic field motor cooling structure, and will not be described in detail herein.

[0082] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.

[0083] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0084] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0085] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. An axial magnetic field motor cooling structure, characterized in that: include: A stator assembly, the stator assembly comprising a stator shell, the stator shell enclosing a stator inner cavity and a heat dissipation cavity (103) located outside the stator inner cavity, the stator inner cavity being used to accommodate a stator winding, and heat exchange medium being arranged in the heat dissipation cavity (103) and the stator inner cavity; The medium circulation driving device (300) is used to drive the heat exchange medium to circulate between the heat dissipation cavity (103) and the stator inner cavity.

2. The axial magnetic field motor cooling structure according to claim 1, characterized in that: The heat dissipation cavity (103) is provided with a medium inlet (1021), the stator inner cavity is provided with a medium outlet (1022), and the heat dissipation cavity (103) and the stator inner cavity are connected via a medium return port (1023); The inlet end of the medium circulation driving device (300) is in communication with the medium outlet (1022), and the outlet end of the medium circulation driving device (300) is in communication with the medium inlet (1021).

3. The axial magnetic field motor cooling structure according to claim 2, characterized in that: A partition is provided in the heat dissipation cavity (103) to separate the medium inlet (1021) and the medium return port (1023); The circular arc formed by the medium inlet (1021) and the medium return port (1023) and centered at the axis of the stator assembly is an opening circular arc, and the central angle of the opening circular arc is smaller than a preset central angle.

4. The axial magnetic field motor cooling structure according to claim 2, characterized in that: The stator housing comprises: A stator housing (100), wherein the heat dissipation cavity (103) is arranged in the stator housing (100); A stator inner shell (400) is disposed on the inner side of the stator outer shell (100) and is coaxially arranged with the stator outer shell (100); There are two stator seals arranged in parallel, and the outer side of each stator seal is sealed to the stator outer shell (100), and the inner side of each stator seal is sealed to the stator inner shell (400). The stator outer shell (100), the stator inner shell (400) and the two stator seals form a stator inner cavity.

5. The axial magnetic field motor cooling structure according to claim 4, characterized in that: The inner wall of the stator housing (100) is provided with a seal mounting rib (102), and the outer side of the stator seal is fixed to the seal mounting rib (102); The opening ends of the medium inlet (1021) and the medium outlet (1022) are both located at the sealing component mounting rib (102).

6. The axial magnetic field motor cooling structure according to claim 4, characterized in that: The stator housing (100) comprises: A heat dissipation cavity outer wall (104) and a heat dissipation cavity inner wall (105), wherein the heat dissipation cavity (103) is formed between the heat dissipation cavity outer wall (104) and the heat dissipation cavity inner wall (105); The heat dissipation fins (101) are arranged on a side of the heat dissipation cavity outer wall (104) facing away from the heat dissipation cavity (103).

7. The axial magnetic field motor cooling structure according to claim 6, characterized in that: At least one of the heat dissipation cavity outer wall (104) and the heat dissipation cavity inner wall (105) is provided with heat dissipation ribs (106), and the heat dissipation ribs (106) are multiple and arranged at intervals in the heat dissipation cavity (103).

8. The axial magnetic field motor cooling structure according to claim 7, characterized in that: The heat dissipation rib (106) is provided with a dielectric through hole penetrating the wall thickness; and / or, The heat dissipation rib (106) is connected to one of the heat dissipation cavity outer wall (104) and the heat dissipation cavity inner wall (105), and has a medium passing gap between the other.

9. The axial magnetic field motor cooling structure according to any one of claims 1 to 8, characterized in that: The heat exchange medium is cooling oil; and / or, The medium circulation driving device (300) is a circulation pump.

10. An axial magnetic field motor, characterized in that: It comprises an axial magnetic field motor cooling structure as described in any one of claims 1 to 9, wherein the stator assembly is provided with motor end covers (200) on both sides along the axial direction, wherein a drive device fixing part (201) is provided on one of the motor end covers (200), and the medium circulation drive device (300) is fixed on the drive device fixing part (201).

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