Axial magnetic field motor stator cooling structure and axial magnetic field motor

Abstract

The present invention provides an axial magnetic field motor stator cooling structure and an axial magnetic field motor, wherein the axial magnetic field motor stator cooling structure includes a housing; a plurality of iron core windings, the plurality of iron core windings being mounted within an annular cavity of the housing and forming at least two flow regions with the housing, the flow regions including an outer winding flow channel, an inner winding flow channel, and an inter-winding flow channel, the inner winding flow channel and the outer winding flow channel being arranged radially from inside to outside, each inter-winding flow channel being connected between the inner winding flow channel and the outer winding flow channel; an inner ring reversing flow channel assembly, the inner ring reversing flow channel assembly being mounted within a shaft sleeve hole, the inner ring reversing flow channel assembly including at least one inner ring flow channel, the inner ring flow channel connecting two different flow regions, the liquid in the inter-winding flow channels within the two flow regions connected by the inner ring flow channel flowing in opposite directions, so that the cooling medium can evenly pass through each flow region, thereby improving the cooling capacity, ensuring the good operation of the motor, and ensuring the reliability of the motor.

Description

Technical Field

[0001] The present invention relates to the field of axial magnetic field motors, and in particular to an axial magnetic field motor stator cooling structure and an axial magnetic field motor. Background Art

[0002] Axial magnetic field motors, also known as disc motors, offer advantages such as compact size, high torque density, high power density, and high efficiency. They are widely used in electric vehicles, general industry, and other fields. A motor consists of a housing, stator, and rotor, with the stator and rotor located within the housing. During operation, the motor generates various losses, which in turn cause the motor to heat up. To improve the motor's efficiency, a cooling mechanism is required. Currently, this cooling mechanism involves creating channels in the bottom plate of the housing to introduce a cooling medium to exchange heat with the heating element, thereby achieving cooling.

[0003] The main heating element of the motor is the iron core winding of the stator. However, when opening channels in the bottom plate, the cooling medium has no direct contact with the iron core winding, resulting in a poor heat exchange effect. In addition, opening channels inside the bottom plate makes processing more difficult and even affects its supporting capacity and strength. Although the existing technology has the method of directly introducing the cooling medium into the stator cavity surrounded by the shell to exchange heat with the iron core winding installed in the stator cavity, there are multiple iron core windings arranged circumferentially in the stator cavity, and the cooling medium flows in the stator cavity. It is inevitable that the cooling medium will not be directly discharged without heat exchange contact with all the iron core windings. Therefore, how to ensure that the flow direction of the cooling medium can cover all the iron core windings is an urgent problem to be solved. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides an axial magnetic field motor stator cooling structure and an axial magnetic field motor, providing several flow areas and an inner ring flow channel located radially inside the flow area, through circumferentially arranged oil spray holes, so that the cooling medium can flow evenly between the flow area and the inner ring flow channel, so that the flow direction of the cooling medium can cover all the iron core windings, while avoiding excessive processing of the shell, which affects its supporting capacity and strength.

[0005] According to one object of the present invention, the present invention provides an axial magnetic field motor stator cooling structure, comprising:

[0006] A housing, wherein the housing is provided with an annular cavity and a shaft sleeve hole;

[0007] a plurality of core windings, the core windings comprising a stator core and a winding sleeved on the stator core, the core windings being mounted in the annular cavity and forming at least two flow regions with the housing, the flow regions comprising a winding outer ring flow channel, a winding inner ring flow channel, and a plurality of inter-winding flow channels, the winding inner ring flow channel and the winding outer ring flow channel being arranged radially from inside to outside, the inter-winding flow channels being arranged circumferentially at intervals, and each inter-winding flow channel being connected between the winding inner ring flow channel and the winding outer ring flow channel;

[0008] An inner ring reversing flow channel assembly is installed in the shaft sleeve hole, and the inner ring reversing flow channel assembly includes at least one inner ring flow channel, and the inner ring flow channel connects two different flow areas, and the liquid flow directions in the inter-winding flow channel in the two flow areas connected by the inner ring flow channel are opposite.

[0009] As a preferred embodiment, the housing includes an outer plate and an inner plate, and the annular cavity is formed between the inner plate and the outer plate;

[0010] A plurality of the core windings are circumferentially spaced apart and arranged between the outer plate and the inner plate, the outer ring flow channel of the winding is formed between the core winding and the outer plate, the inner ring flow channel of the winding is formed between the core winding and the inner plate, and the inter-winding flow channel is formed between two adjacent core windings;

[0011] Two adjacent flow areas are separated by a barrier.

[0012] As a preferred embodiment, the barrier is inserted between two adjacent core windings and abuts between the outer plate and the inner plate;

[0013] Alternatively, the barrier comprises two partitions, the inner plate and the outer plate are respectively connected to one partition, and the core winding abuts between the two partitions.

[0014] As a preferred embodiment, the inner ring flow channel includes a flow channel groove, the outer ring of the inner ring reversing flow channel assembly is recessed to form the flow channel groove, and the inner enclosure is provided with an oil injection hole corresponding to the flow channel groove.

[0015] As a preferred embodiment, the outer ring of the inner ring reversing flow channel assembly is further provided with a boss, the boss and the flow channel groove are arranged in the circumferential direction, and the boss abuts against the inner ring of the inner enclosure plate.

[0016] As a preferred embodiment, the number of the barrier members is two, and the two barrier members are arranged equidistantly along the circumferential direction to form the flow areas on both sides of the barrier members respectively. The boss is adjacent to and opposite to one of the barrier members and is located between the oil inlet and the oil outlet.

[0017] As a preferred embodiment, the housing further includes:

[0018] Two bottom plates, the two bottom plates are respectively connected between the inner ring reversing flow channel component and the outer peripheral plate, and the axial ends of the inner ring reversing flow channel component and the iron core winding are respectively connected between the two bottom plates.

[0019] As a preferred embodiment, a plurality of positioning grooves are provided on the base plate, and the positioning grooves on the two base plates correspond to each other. The iron core is inserted into the corresponding positioning grooves of the two base plates, and the winding sleeved on the outer ring of the iron core is located between the two base plates.

[0020] As a preferred embodiment, the outer ring of the inner ring reversing flow channel assembly and the inner ring of the outer plate are respectively provided with steps, and the two bottom plates are respectively abutted and fixed on the steps of the inner ring reversing flow channel assembly and the outer plate.

[0021] According to another object of the present invention, the present invention also provides an axial magnetic field motor, comprising at least one axial magnetic field motor stator cooling structure of the above-mentioned embodiment, the axial magnetic field motor also comprising at least one rotor, and the stator cooling structure maintains the rotor in an air gap on at least one axial side.

[0022] Compared with the existing technology, this technical solution has the following advantages:

[0023] The method of immersing the core winding in a cooling medium can reduce the temperature of the core and winding constituting the core winding to a lower temperature, thereby ensuring the good operation of the motor and the reliability of the motor, and also improving the operating efficiency and peak power of the motor.

[0024] Since the liquid flow directions in the inter-winding flow channel in the two flow areas connected by the inner ring flow channel are opposite, the cooling medium flows radially from the outside to the inside in the flow area connected to the oil inlet, and flows radially from the inside to the outside in the flow area connected to the oil outlet until it is discharged from the oil outlet, so that the cooling medium can pass through each flow area evenly, thereby improving the cooling capacity.

[0025] By arranging an inner ring flow channel radially inside the flow area, and providing a plurality of oil spray holes spaced circumferentially between the inner ring flow channel and the flow area, the cold zone medium can flow evenly between the flow area and the inner ring flow channel, ensuring that the iron core winding in the flow area can be completely immersed in the cooling medium, thereby improving the cooling capacity.

[0026] The inner ring reversing flow channel assembly can be spliced to the inner ring of the inner enclosure plate to form the inner ring flow channel, and the two can be bonded and fixed using glue to improve molding efficiency and reduce processing difficulty.

[0027] The present invention is further described below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic structural diagram of the stator cooling structure of the present invention;

[0029] Figure 2 This is an exploded view of the stator cooling structure of the present invention;

[0030] Figure 3 This is a schematic diagram of the assembly of the stator cooling structure of the present invention;

[0031] Figure 4 A longitudinal cross-sectional view of the stator cooling structure of the present invention;

[0032] Figure 5 is a transverse cross-sectional view of the stator cooling structure of the present invention;

[0033] Figure 6 This is a schematic structural diagram of the inner ring reversing flow channel assembly in the stator cooling structure of the present invention;

[0034] Figure 7 This is a schematic structural diagram of the inner panel in the stator cooling structure of the present invention.

[0035] In the figure: 100 stator cooling structure, 1001 oil inlet, 1002 flow area, 1002a winding outer ring flow channel, 1002b inter-winding flow channel, 1002c winding inner ring flow channel, 1003 inner ring flow channel, 1003a flow channel groove, 1004 oil outlet, 1005 oil spray hole, 110 shell, 111 outer plate, 112 inner ring reversing flow channel assembly, 112a boss, 113 inner plate, 114 bottom plate, 114a positioning groove, 114b bottom plate mounting hole, 115 step, 115a step mounting hole, 120 core winding, 121 stator core, 122 winding, 130 barrier, 131 partition, 1101 annular cavity, 1102 sleeve hole. DETAILED DESCRIPTION

[0036] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0037] First embodiment

[0038] like Figure 1 As shown, the axial magnetic field motor stator cooling structure 100 includes:

[0039] The housing 110 is provided with an annular cavity 1101 and a shaft sleeve hole 1102;

[0040] a plurality of core windings 120, each comprising a stator core 121 and a winding 122 sleeved on the stator core 121. The plurality of core windings 120 are mounted within the annular cavity 1101 and form at least two flow regions 1002 with the housing 110. The flow regions 1002 include a winding outer ring flow channel 1002a, a winding inner ring flow channel 1002c, and a plurality of inter-winding flow channels 1002b. The winding inner ring flow channel 1002c and the winding outer ring flow channel 1002a are arranged radially from inside to outside, and the plurality of inter-winding flow channels 1002b are arranged circumferentially at intervals, and each inter-winding flow channel 1002b is connected between the winding inner ring flow channel 1002c and the winding outer ring flow channel 1002a.

[0041] The inner ring reversing flow channel assembly 112 is installed in the shaft sleeve hole 1102. The inner ring reversing flow channel assembly 112 includes at least one inner ring flow channel 1003. The inner ring flow channel 1003 connects two different flow areas 1002. The liquid flow directions in the inter-winding flow channel 1002b in the two flow areas 1002 connected by the inner ring flow channel 1003 are opposite.

[0042] The outer periphery of the housing 110 is provided with an oil inlet 1001 and an oil outlet 1004. The oil inlet 1001 corresponds to the connected flow area 1002. The cooling medium (including but not limited to cooling oil) introduced from the oil inlet 1001 first flows into the winding outer ring flow channel 1002a. The cooling medium flows in the winding outer ring flow channel 1002a and at the same time flows from the plurality of winding inter-flow channels 1002b to the winding inner ring flow channel 1002c. A plurality of oil injection holes 1005 connecting the winding inner circle flow channel 1002c and the inner ring flow channel 1003 are arranged at intervals in the circumferential direction, so that the cooling medium can flow in the winding inner circle flow channel 1002c, and an iron core winding 120 is installed between two adjacent inter-winding flow channels 1002b. Therefore, the direction of the cooling medium can cover all the iron core windings and can completely surround the outer periphery of each iron core winding 120, thereby effectively improving the cooling capacity and ensuring the reliability of the stator. In addition, the liquid flow directions in the inter-winding flow channel 1002b in the two flow areas 1002 connected by the inner ring flow channel 1003 are opposite. Therefore, in the flow area 1002 connected to the oil inlet 1101, the cooling medium flows radially from the outside to the inside, while in the flow area 1002 connected to the oil outlet 1004, the cooling medium flows radially from the inside to the outside until it is discharged from the oil outlet 1004, so that the cooling medium can pass through each flow area 1002 evenly, thereby improving the cooling capacity.

[0043] In summary, by providing an inner ring flow channel 1003 radially inwardly of the flow region 1002, and providing a plurality of circumferentially spaced oil injection holes 1005 between the inner ring flow channel 1003 and the flow region 1002, the cold zone medium can flow evenly between the flow region 1002 and the inner ring flow channel 1003, ensuring that the core winding 120 within the flow region 1002 is completely immersed in the cooling medium, thereby improving the cooling capacity. Compared to opening a channel inside the bottom plate and introducing cooling water, the method of immersing the core winding 120 with the cooling medium can reduce the stator core 121 and winding 122 that constitute the core winding 120 to a lower temperature. Figure 2 , ensuring the good operation of the motor and the reliability of the motor, and also improving the operating efficiency and peak power of the motor.

[0044] refer to Figure 1The number of the flow regions 1002 and the inner ring flow channel 1003 can be multiple, with each inner ring flow channel 1003 flowing through two flow regions 1002, so that the cooling medium can flow in the two flow regions 1002. When the number of the flow regions 1002 is three or more, the multiple flow regions 1002 are sequentially connected end to end between the oil inlet 1001 and the oil outlet 1004. For example, the cooling medium passes through the multiple flow regions 1002 in sequence along the circumferential direction, or the cooling medium passes through the multiple flow regions 1002 in an interlaced manner. The cooling medium introduced through the oil inlet 1001 can circulate through each flow region 1002 in sequence until it is discharged from the oil outlet 1004. When the number of the inner ring flow channels 1003 is two or more, the inner ring flow channels 1003 are staggered, including but not limited to being staggered up and down, so that the cooling medium can pass through each flow region 1002 in sequence according to its direction.

[0045] like Figures 1 to 5 As shown, the housing 110 includes an outer plate 111 and an inner plate 113. The inner plate 113 is connected to the outer ring of the inner ring reversing flow channel assembly 112. The inner ring flow channel 1003 is formed between the inner ring reversing flow channel assembly 112 and the inner plate 113. The flow area 1002 is formed between the inner plate 113 and the outer plate 111. The oil inlet 1001 and the oil outlet 1004 are connected to the outer plate 111.

[0046] A plurality of core windings 120 are circumferentially spaced apart and arranged between the outer plate 111 and the inner plate 113. The outer ring flow channel 1002a is formed between the core winding 120 and the outer plate 111, the inner ring flow channel 1002c is formed between the core winding 120 and the inner plate 113, and the inter-winding flow channel 1002b is formed between two adjacent core windings 120.

[0047] Two adjacent flow areas 1002 are separated by a barrier 130 .

[0048] The inner ring reversing channel assembly 112 can be spliced to the inner ring of the inner panel 113 to form the inner ring channel 1003, and the two can be fixed with glue to improve molding efficiency and reduce processing difficulty. Figure 5Gaps exist between the core winding 120 and the inner and outer plates 113 and 111, respectively, to form the inner and outer winding channels 1002c and 1002a, respectively, and to ensure insulation. The inner plate 113 can be made of high-strength non-metallic materials, such as glass fiber composites, carbon fiber composites, or plastics. Plastics include PPS, PPA, PA, and PEEK. This ensures the strength of the inner plate 113 and reduces the distance between the core winding 120 and the inner plate 113, maintaining a small overall radial dimension and increasing its adaptability to installation environments. The outer plate 111 and the inner ring reversing channel assembly 112 can be made of high-strength non-metallic materials or high-strength metal materials, such as alloy steel or aluminum alloy.

[0049] The inner ring reversing flow channel assembly 112, the outer plate 111 and the inner plate 113 can all be annular, so that the winding inner ring flow channel 1002c and the winding outer ring flow channel 1002a are roughly annular. Of course, the inner ring reversing flow channel assembly 112, the outer plate 111 and the inner plate 113 can also be other shapes, which are not limited here.

[0050] The number of the blocking members 130 is consistent with the number of the flow regions 1002 , that is, when the number of the blocking members 130 is two, the number of the flow regions 1002 is also two.

[0051] like Figure 2 and Figure 5 As shown, a plurality of core windings 120 are arranged circumferentially and equidistantly around the stator centerline. The core windings 120 include a stator core 121 and a winding 122, which is wound around the outer ring of the stator core 121. The stator core 121 can be formed by radially stacking a plurality of silicon steel sheets, or by die-stamping SMC (soft magnetic composite). The stator core 121 can be trapezoidal, with the upper base of the trapezoid facing inward and the lower base of the trapezoid facing outward. The windings 122 can be round copper wire or flat copper wire.

[0052] The number of the flow areas 1002 may be determined by the barrier 130. Figure 1 and Figure 5, the number of the barrier members 130 is two, and the number of the flow areas 1002 is two. The barrier members 130 are connected between the outer plate 111 and the inner plate 113, and the two barrier members 130 are symmetrically arranged vertically to form two identically shaped and bilaterally symmetrical flow areas 1002. The barrier members 130 can be made of high-strength non-metallic materials to ensure insulation. The barrier members 130 can also have the following two embodiments:

[0053] In one embodiment, the barrier 130 is inserted between two adjacent core windings 120 and abuts against the outer plate 111 and the inner plate 113. Figure 5 .

[0054] In another embodiment, the barrier 130 includes two partitions 131, the inner plate 113 and the outer plate 111 are respectively connected to a partition 131, and the core winding 120 is abutted between the two partitions 131. Figure 1 and Figure 2 Since the distances between the core winding 120 and the inner and outer panels 113 and 111 may be different, the sizes of the partitions 131 constituting the barrier 130 may be different. For example, the partition 131 between the core winding 120 and the inner and outer panels 113 may be shorter, while the partition 131 between the core winding 120 and the outer panel 111 may be longer.

[0055] like Figure 1 As shown, the oil inlet 1001 and the oil outlet 1004 are arranged adjacent to each other and close to the partition 131 located above, so that the cooling medium introduced by the oil inlet 1001 can pass through the flow area 1002 located on the left in a counterclockwise direction, and then the cooling medium can pass through the flow area 1002 located on the right in a clockwise direction until it is discharged from the oil outlet 1004, so that all the core windings 120 can be immersed in the cooling medium to ensure the cooling effect.

[0056] like Figure 2 、 Figure 4 、 Figure 6 and Figure 7As shown, the inner ring flow channel 1003 includes a flow channel groove 1003a. The outer ring of the inner ring reversing flow channel assembly 112 is recessed to form the flow channel groove 1003a. The inner enclosure plate 113 is provided with an oil injection hole 1005 corresponding to the flow channel groove 1003a. By providing the flow channel groove 1003a on the outer ring of the inner ring reversing flow channel assembly 112 and then joining the inner enclosure plate 113 to the outer ring of the inner ring reversing flow channel assembly 112, the inner ring flow channel 1003 is formed between the flow channel groove 1003a and the inner enclosure plate 113, thereby reducing the difficulty of manufacturing while ensuring the stability and reliability of the structure.

[0057] refer to Figure 1 、 Figure 4 and Figure 6 The outer ring of the inner ring reversing flow channel assembly 112 is also provided with a boss 112a, and the boss 112a and the flow channel groove 1003a are arranged in the circumferential direction. The boss 112a abuts against the inner ring of the inner plate 113. By setting the boss 112a, the inner ring flow channel 1003 is prevented from forming an annular structure that is connected end to end, thereby preventing the cooling medium from circulating in an annular shape in the inner ring flow channel 1003, that is, preventing the cooling medium flowing out from the flow area 1002 on the left from continuing to flow back to the flow channel area 1002 on the left, ensuring that the cooling medium can circulate through multiple flow areas 1002.

[0058] Specifically, the boss 112a is arranged upward and is located between the upwardly arranged oil inlet 1001 and the oil outlet 1004. In addition, the boss 112a is adjacent to and directly opposite the barrier 130 located on the upper side, so that the inner ring flow channel 1003 can evenly cover the two flow areas 1002, that is, the inner ring flow channel 1003 can be symmetrically arranged along the barrier 130, and can ensure that the cooling medium can flow evenly between the inner ring flow channel 1003 and the flow area 1002.

[0059] like Figure 1 and Figure 7 As shown, the inner panel 113 is provided with the oil injection holes 1005 connected to different flow areas 1002. The oil injection holes 1005 can be square or circular, etc. By adjusting the number, position and size of the oil injection holes 1005, the flow rate can be adjusted, thereby designing a flow rate and cooling effect that meets the requirements. It can be seen that the shape and size of each oil injection hole 1005 can be different. Figure 1 The oil injection hole 1005 and the inter-winding flow channel 1002b are staggered to avoid the cooling medium not completely covering the winding inner ring flow channel 1002c due to the two being opposite to each other.

[0060] like Figures 2 to 4As shown, the housing 110 further includes:

[0061] Two bottom plates 114 are respectively connected between the inner ring reversing flow channel assembly 112 and the outer plate 111 , and the inner plate 113 and the axial ends of the core winding 120 are respectively connected between the two bottom plates 114 .

[0062] Specifically, the outer ring of the inner ring reversing flow channel assembly 112 and the inner ring of the outer plate 111 are each provided with a step 115. The two base plates 114 are respectively abutted and fixed on the steps 115 of the inner ring reversing flow channel assembly 112 and the outer plate 111 for preliminary fixation, and can then be fixed by bolts. For example, the base plate 114 is provided with a base plate mounting hole 114b, and the step 115 is provided with a step mounting hole 115a. When the base plate 114 is respectively abutted against the steps 115 of the inner ring reversing flow channel assembly 112 and the outer plate 111, the base plate mounting hole 114b and the step mounting hole 115a are opposite each other. Finally, a bolt is passed through the base plate mounting hole 114b and screwed into the step mounting hole 115a.

[0063] The base plate 114 is provided with a plurality of positioning slots 114a. The positioning slots 114a on the two base plates 114 correspond one to one. The stator core 121 is inserted into the corresponding positioning slots 114a on the two base plates 114. The winding 122, which is sleeved on the outer ring of the stator core 121, is located between the two base plates 114. The positioning slots 114a are adapted to the shape of the stator core 121, both being trapezoidal. The stator core 121 can be fixed to the positioning slots 114a with glue to ensure bonding strength and thus enhance the stability of the structure. Furthermore, the positioning slots 114a allow the core winding 120 to be positioned and installed on the base plate 114, thereby improving installation efficiency and ensuring the installation position.

[0064] The inner panel 113 can be fixed to the two bottom panels 114 by glue.

[0065] The base plate 114 is made of a non-metallic material with high strength, non-magnetic conductivity, and non-conductivity. This reduces eddy currents generated by magnetic field penetration and provides high-strength support. Furthermore, the base plate 114 is relatively thin, ensuring that at least one axial end of the core winding 120 can fit within the rotor air gap, thereby forming a single-stator, dual-rotor, or multi-stator, multi-rotor cascaded equiaxial magnetic field motor.

[0066] like Figure 3 and Figure 4As shown, the two base plates 114 are sleeved outside the inner ring reversing flow channel assembly 112 and abut against the steps 115 on the outer ring of the base plates 114. At this time, the two base plates 114 are roughly flush with the axial ends of the inner ring reversing flow channel assembly 112, and one base plate 114 is embedded in the outer plate 111. A reduction structure, bearings, etc. can be installed on the side of the base plate 114 facing away from the core winding 120. The reduction structure can be partially or completely embedded in the area enclosed by the outer plate 111, making rational use of space and ensuring the overall structure is compact and small in size. At the same time, a cooling medium can be used to cool the bearings and reduction structure.

[0067] The assembly method of the stator cooling structure 100 is as follows:

[0068] The inner ring reversing flow channel assembly 112, the outer plate 111, the inner plate 113, the core winding 120 and the barrier 130 are respectively installed as follows Figure 1 or Figure 5 As shown, it is arranged on a bottom plate 114. Then the other bottom plate 114 is sealed to the other side of the inner ring reversing flow channel component 112 and the outer plate 111, so that the assembly is convenient and quick.

[0069] In summary, by disposing an inner annular flow channel 1003 radially inwardly of the flow region 1002 and providing a plurality of circumferentially spaced oil injection holes 1005 between the inner annular flow channel 1003 and the flow region 1002, the cold zone medium can flow evenly between the flow region 1002 and the inner annular flow channel 1003, ensuring that the core windings 120 within the flow region 1002 are completely immersed in the cooling medium, thereby improving cooling capacity. Compared to opening channels within the base plate and introducing cooling water, immersing the core windings 120 in the cooling medium can reduce the stator core 121 and windings 122 that comprise the core windings 120 to a lower temperature, ensuring the proper operation and reliability of the motor, while also improving the motor's operating efficiency and peak power. The inner ring reversing flow channel assembly 112 can be spliced to the inner ring of the inner enclosure plate 113 to form the inner ring flow channel 1003, and the two can be bonded and fixed by glue to improve molding efficiency and reduce processing difficulty.

[0070] Second embodiment

[0071] The present invention also provides an axial magnetic field motor, comprising at least one axial magnetic field motor stator cooling structure 100 according to the above embodiment, wherein the axial magnetic field motor further comprises at least one rotor, and the stator cooling structure 100 maintains the rotor in an air gap on at least one axial side.

[0072] Since the axial magnetic field motor adopts the stator cooling structure 100 of the above embodiment, the beneficial effects of the axial magnetic field motor can refer to the stator cooling structure 100 .

[0073] According to the number of rotors and stators, the axial magnetic field motor can be divided into a single-stator dual-rotor axial magnetic field motor or a multi-stator dual-rotor axial magnetic field motor. In the single-stator dual-rotor axial magnetic field motor, the stator cooling structure 100 is maintained between the two rotors in an air gap.

[0074] The embodiments described above are only used to illustrate the technical ideas and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. The scope of the patent application of the present invention cannot be limited by these embodiments alone. That is, any equivalent changes or modifications made according to the spirit disclosed by the present invention still fall within the patent scope of the present invention.

Claims

1. An axial magnetic field motor stator cooling structure (100), characterized in that: include: A housing (110), wherein the housing (110) is provided with an annular cavity (1101) and a shaft sleeve hole (1102), and an oil inlet (1001) and an oil outlet (1004) are provided on the outer periphery of the housing (110); A plurality of iron core windings (120), the iron core windings (120) comprising a stator iron core (121) and a winding (122) sleeved on the stator iron core (121), the plurality of iron core windings (120) being installed in the annular cavity (1101) and forming at least two flow areas (1002) with the housing (110), the flow areas (1002) comprising a winding outer ring flow channel (1002a), a winding outer ring flow channel (1002b), and a winding outer ring flow channel (1002c). An inner ring flow channel (1002c) and a plurality of inter-winding flow channels (1002b), wherein the winding inner ring flow channel (1002c) and the winding outer ring flow channel (1002a) are arranged radially from inside to outside, and a plurality of the inter-winding flow channels (1002b) are arranged at intervals along the circumferential direction, and each inter-winding flow channel (1002b) is connected between the winding inner ring flow channel (1002c) and the winding outer ring flow channel (1002a); an inner ring reversing flow channel assembly (112), the inner ring reversing flow channel assembly (112) being mounted in the shaft sleeve hole (1102), the inner ring reversing flow channel assembly (112) comprising at least one inner ring flow channel (1003), the inner ring flow channel (1003) being connected to two different flow areas (1002), and the liquids in the inter-winding flow channels (1002b) in the two flow areas (1002) connected by the inner ring flow channel (1003) flowing in opposite directions; Two adjacent flow areas (1002) are separated by a barrier (130), and the outer ring of the inner ring reversing flow channel assembly (112) is further provided with a boss (112a); There are two blocking members (130), and the two blocking members (130) are arranged at equal intervals along the circumferential direction to form the flow areas (1002) on both sides of the blocking members (130). The boss (112a) is adjacent to and directly faces one of the blocking members (130) and is located between the oil inlet (1001) and the oil outlet (1004).

2. The axial magnetic field motor stator cooling structure (100) according to claim 1, characterized in that: The housing (110) comprises an outer plate (111) and an inner plate (113), wherein the annular cavity (1101) is formed between the inner plate (113) and the outer plate (111); A plurality of the core windings (120) are arranged at intervals along the circumferential direction between the outer plate (111) and the inner plate (113); an outer ring flow channel (1002a) of the winding is formed between the core winding (120) and the outer plate (111); an inner ring flow channel (1002c) of the winding is formed between the core winding (120) and the inner plate (113); and an inter-winding flow channel (1002b) is formed between two adjacent core windings (120).

3. The axial magnetic field motor stator cooling structure (100) according to claim 2, characterized in that: The barrier (130) is inserted between two adjacent core windings (120) and abuts between the outer plate (111) and the inner plate (113); Alternatively, the barrier (130) includes two partitions (131), the inner plate (113) and the outer plate (111) are respectively connected to one partition (131), and the core winding (120) abuts between the two partitions (131).

4. The axial magnetic field motor stator cooling structure (100) according to claim 2, characterized in that: The inner ring flow channel (1003) comprises a flow channel groove (1003a), the outer ring of the inner ring reversing flow channel assembly (112) is recessed to form the flow channel groove (1003a), and the inner enclosure plate (113) is provided with an oil injection hole (1005) corresponding to the flow channel groove (1003a).

5. The axial magnetic field motor stator cooling structure (100) according to claim 4, characterized in that: The boss (112a) and the flow channel groove (1003a) are arranged in the circumferential direction, and the boss (112a) abuts against the inner ring of the inner enclosure plate (113).

6. The axial magnetic field motor stator cooling structure (100) according to claim 2, characterized in that: The housing (110) further comprises: Two bottom plates (114), the two bottom plates (114) are respectively connected between the inner ring reversing flow channel assembly (112) and the outer plate (111), and the axial ends of the inner ring reversing flow channel assembly (112) and the iron core winding (120) are respectively connected between the two bottom plates (114).

7. The axial magnetic field motor stator cooling structure (100) according to claim 6, characterized in that: A plurality of positioning grooves (114a) are provided on the bottom plate (114), and the positioning grooves (114a) on the two bottom plates (114) correspond to each other. The iron core (121) is inserted into the corresponding positioning grooves (114a) of the two bottom plates (114), and the winding (122) sleeved on the outer ring of the iron core (121) is located between the two bottom plates (114).

8. The axial magnetic field motor stator cooling structure (100) according to claim 6, characterized in that: The outer ring of the inner ring reversing flow channel assembly (112) and the inner ring of the outer plate (111) are respectively provided with steps (115), and the two bottom plates (114) are respectively abutted and fixed on the steps (115) of the inner ring reversing flow channel assembly (112) and the outer plate (111).

9. An axial magnetic field motor, characterized in that: The invention comprises at least one axial magnetic field motor stator cooling structure (100) according to any one of claims 1 to 8, wherein the axial magnetic field motor further comprises at least one rotor, and the stator cooling structure (100) holds the rotor in an air gap on at least one axial side.

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