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

Abstract

The application provides an axial magnetic field motor stator cooling structure and an axial magnetic field motor, wherein the axial magnetic field motor stator cooling structure comprises a shell; a plurality of core windings, the plurality of core windings are installed in an annular cavity of the shell and form a flow area with the shell, the flow area comprises an oil inlet flow area, an intermediate flow area and an oil outlet flow area; an inner ring reversing flow channel assembly, the inner ring reversing flow channel assembly is installed in a shaft sleeve hole, the inner ring reversing flow channel assembly comprises an oil inlet flow channel and an oil outlet flow channel, the oil inlet flow channel is communicated between the oil inlet flow area and the intermediate flow area, the oil outlet flow channel is communicated between the intermediate flow area and the oil outlet flow area, the parts, where the oil inlet flow channel and the oil outlet flow channel are communicated with the intermediate flow area, are arranged in a circumferential direction, and the liquid flow directions in the oil inlet flow channel and the oil outlet flow channel are opposite. The cooling medium can uniformly pass through the gaps, so that the cooling mechanism can completely soak the core windings, and the cooling performance is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of axial magnetic field motor, in particular to a kind of axial magnetic field motor stator cooling structure and axial magnetic field motor. BACKGROUND

[0002] Axial magnetic field motor is also called disc type motor, with small volume, high torque density, high power density and high efficiency, etc., is widely used in electric vehicles, general industry and other fields.Motor includes shell, stator and rotor, stator and rotor are arranged in the shell inside.Motor will produce various losses in the process of operation, and then cause motor heating, in order to improve the working efficiency of motor, therefore, the cooling structure needs to be designed for motor.

[0003] The cooling structure is used to introduce cooling medium into the shell to contact heat exchange with the heating element, so as to realize cooling and temperature reduction.The main heating element of motor is the core winding of stator, each core winding is arranged in the shell in the circumferential direction, and the cooling medium flows in the shell in the circumferential direction to exchange heat with the core winding.However, there are gaps between each core winding and between the core winding and the inner and outer peripheral plates of the shell, and the cooling medium flows in the shell in the circumferential direction, which cannot ensure that the cooling medium flows uniformly in each gap, and cannot achieve the optimal cooling effect. SUMMARY

[0004] In order to solve the above problems, the present application provides a kind of stator cooling structure and axial magnetic field motor, provide several flow areas, and the inner ring flow channel located in the radial inner side of flow area, by circumferential arrangement of oil injection hole, so that cooling medium uniformly flows between flow area and inner ring flow channel, realize the flow direction of cooling medium can cover all core windings, and ensure that cooling medium uniformly passes through the gap between core windings and between core windings and shell, so as to improve the cooling effect.

[0005] According to one object of the present application, the present application provides a kind of stator cooling structure, comprising:

[0006] Shell, the shell is provided with annular cavity and shaft sleeve hole;

[0007] Several core windings, the core winding includes core and coil sleeved on the core, several core windings are installed in annular cavity and form the flow area with the shell, the flow area includes oil inlet flow area, intermediate flow area and oil outlet flow area, the oil inlet flow area, the intermediate flow area and the oil outlet flow area are arranged in the circumferential direction;

[0008] The inner ring reversing flow channel assembly is installed in the shaft sleeve hole, and comprises an oil inlet flow channel and an oil outlet flow channel. The oil inlet flow channel is communicated between the oil inlet flow area and the intermediate flow area, and the oil outlet flow channel is communicated between the intermediate flow area and the oil outlet flow area. The positions where the oil inlet flow channel and the oil outlet flow channel are communicated with the intermediate flow area are arranged in a circumferential staggered manner.

[0009] As a preferred embodiment, the oil inlet flow channel comprises an oil inlet inlet, an oil inlet outlet, and an oil inlet passage extending between the oil inlet inlet and the oil inlet outlet. The oil inlet inlet is communicated with the oil inlet flow area, the oil inlet inlet and the oil inlet outlet are arranged in a circumferential staggered manner, and the oil inlet outlet is communicated with the intermediate flow area.

[0010] The oil outlet flow channel comprises an oil outlet inlet, an oil outlet outlet, and an oil outlet passage extending between the oil outlet inlet and the oil outlet outlet. The oil outlet inlet is communicated with the intermediate flow area, the oil outlet inlet and the oil inlet outlet are arranged in a circumferential staggered manner, the oil outlet outlet is communicated with the oil outlet flow area, and the oil outlet outlet and the oil outlet are arranged in a circumferential staggered manner.

[0011] As a preferred embodiment, the shell comprises a peripheral plate and an inner peripheral plate. The inner ring reversing flow channel assembly is connected to the inner circle of the inner peripheral plate, the inner ring reversing flow channel assembly and the inner peripheral plate form the oil inlet flow channel and the oil outlet flow channel, the inner peripheral plate and the peripheral plate form the flow area, and the peripheral plate is provided with an oil inlet port and an oil outlet port.

[0012] A plurality of core windings are arranged in a circumferential staggered manner between the peripheral plate and the inner peripheral plate. The core winding and the peripheral plate form the winding outer circle flow channel, the core winding and the inner peripheral plate form the winding inner circle flow channel, and the adjacent two core windings form the winding interflow channel.

[0013] A plurality of blocking pieces are arranged in a circumferential staggered manner in the flow area to separate the flow area into the oil inlet flow area, the intermediate flow area and the oil outlet flow area.

[0014] As a preferred embodiment, it further comprises:

[0015] At least one flow guide is located in the intermediate flow area, the flow guide is located between the oil inlet outlet and the oil outlet inlet, and at least one flow guide abuts between a core winding and the inner peripheral plate.

[0016] As a preferred embodiment, the oil inlet channel and the oil outlet channel are arranged on the outer ring of the inner ring commutating flow channel assembly, and the oil inlet, the oil outlet, the oil inlet and the oil outlet are arranged on the inner ring.

[0017] As a preferred embodiment, the barrier is inserted between two adjacent core windings and abuts between the outer ring and the inner ring.

[0018] Alternatively, the barrier comprises two partitions, and the inner ring and the outer ring are connected to one of the partitions, and the core winding abuts between the two partitions.

[0019] As a preferred embodiment, the shell further comprises:

[0020] Two bottom plates, and the two bottom plates are connected between the inner ring commutating flow channel assembly and the outer ring, and the inner ring and the axial ends of the core winding are connected between the two bottom plates.

[0021] As a preferred embodiment, a plurality of positioning grooves are arranged on the bottom plate, and the positioning grooves on the two bottom plates correspond to each other, the core is inserted into the corresponding positioning grooves of the two bottom plates, and the coil arranged on the outer ring of the core is located between the two bottom plates.

[0022] As a preferred embodiment, the outer ring of the inner ring and the inner ring of the outer ring are provided with steps, and the two bottom plates are abutted and fixed on the steps of the inner ring and the outer ring.

[0023] According to another object of the present application, the present application also provides an axial magnetic field motor comprising at least one axial magnetic field motor stator cooling structure of the above-mentioned embodiments, the axial magnetic field motor further comprising at least one rotor, at least one bearing and a rotating shaft, the rotating shaft being arranged in the inner ring of the stator cooling structure, a bearing being arranged between the rotating shaft and the inner ring, at least one side of the stator cooling structure being air gaply kept with one of the rotors, and the rotor being fixed on the rotating shaft.

[0024] Compared with the prior art, the technical scheme has the following advantages:

[0025] By separating the flow area where the core winding is arranged into a plurality of flow areas, and then using the oil inlet flow channel and the oil outlet flow channel to enable the cooling medium to flow between the flow areas, the cooling medium can uniformly pass through each flow area in the radial direction, ensuring that the cooling medium can uniformly pass through each gap, improving the cooling performance, and enabling the cooling mechanism to completely soak the core winding.

[0026] By staggering the oil inlet and the oil inlet port, the oil outlet and the oil outlet port, and the oil inlet port and the oil outlet port, the cooling medium can uniformly pass through each flow area and sufficiently soak each core winding, thereby improving the cooling capacity. The core and the coil constituting the core winding can be reduced to a lower temperature, ensuring good operation of the motor and ensuring the reliability of the motor, and also improving the operating efficiency and peak power of the motor.

[0027] The inner ring reversing flow channel assembly can be spliced in the inner ring of the inner surrounding plate to form the oil inlet flow channel and the oil outlet flow channel, and the two can be fixed by glue bonding, improving the forming efficiency and reducing the processing difficulty.

[0028] The application will be further described below in conjunction with the accompanying drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 Structure diagram of the oil inlet flow channel in the stator cooling structure of the application;

[0030] Figure 2 Structure diagram of the oil outlet flow channel in the stator cooling structure of the application;

[0031] Figure 3 Exploded view of the stator cooling structure of the application;

[0032] Figure 4 Assembled schematic diagram of the stator cooling structure of the application;

[0033] Figure 5 Longitudinal sectional view of the stator cooling structure of the application;

[0034] Figure 6 Transverse sectional view of an embodiment of the stator cooling structure of the application;

[0035] Figure 7 Transverse sectional view of another embodiment of the stator cooling structure of the application;

[0036] Figure 8 Assembled process diagram of the inner ring reversing flow channel assembly and the inner surrounding plate of the application;

[0037] Figure 9 Front view of the inner ring reversing flow channel assembly of the application;

[0038] Figure 10 Back view of the inner ring reversing flow channel assembly of the application.

[0039] In the figure: 100, stator cooling structure; 1001, oil inlet; 1002, flow area; 1002a, oil inlet flow area; 1002b, middle flow area; 1002c, oil outlet flow area; 1003, oil inlet flow channel; 1003a, oil inlet; 1003b, oil outlet; 1003c, oil passage; 1004, oil outlet flow channel; 1004a, oil inlet; 1004b, oil outlet; 1004c, oil passage; 1005, oil outlet; 110, housing; 111, peripheral plate; 112, inner ring reversing flow channel assembly; 113, inner peripheral plate; 114, bottom plate; 114a, positioning groove; 114b, bottom plate mounting hole; 116, step; 116a, step mounting hole; 120, core winding; 121, core; 122, coil; 120a, winding outer ring flow channel; 120b, winding inter-flow channel; 120c, winding inner ring flow channel; 130, barrier; 131, partition plate; 150, flow guide; 1101, annular cavity; 1102, shaft sleeve hole. DETAILED DESCRIPTION

[0040] The following description is provided to enable any person skilled in the art to practice the present application. The preferred embodiments described below are only examples of the present application and the skilled person can think of other obvious modifications. The basic principles defined in the following description can be applied to other embodiments, modifications, improvements, equivalents and other technical solutions without departing from the spirit and scope of the present application.

[0041] First embodiment

[0042] As shown in Figure 1 and Figure 2 The axial magnetic field motor stator cooling structure 100 comprises:

[0043] A housing 110, wherein an annular cavity 1101 and a shaft sleeve hole 1102 are arranged on the housing 110;

[0044] A plurality of core windings 120, wherein the core winding 120 comprises a core 121 and a coil 122 sleeved on the core 121, the plurality of core windings 120 are installed in the annular cavity 1101 and form the flow area 1002 with the housing 110, the flow area 1002 comprises an oil inlet flow area 1002a, a middle flow area 1002b and an oil outlet flow area 1002c, the oil inlet flow area 1002a, the middle flow area 1002b and the oil outlet flow area 1002c are arranged in a circumferential interval;

[0045] An inner ring reversing flow channel assembly 112 is installed in the shaft sleeve hole 1102, the inner ring reversing flow channel assembly 112 includes an oil inlet flow channel 1003 and an oil outlet flow channel 1004, the oil inlet flow channel 1003 is communicated between the oil inlet flow area 1002a and the intermediate flow area 1002b, the oil outlet flow channel 1004 is communicated between the intermediate flow area 1002b and the oil outlet flow area 1002c, the positions where the oil inlet flow channel 1003 and the oil outlet flow channel 1004 are communicated with the intermediate flow area 1002b are arranged in a circumferential staggered manner, and the liquid flow directions in the oil inlet flow channel 1003 and the oil outlet flow channel 1004 are opposite.

[0046] The outer periphery of the shell 110 is provided with an oil inlet 1001 and an oil outlet 1005, a cooling medium (including but not limited to cooling oil) is introduced into the oil inlet flow area 1002a through the oil inlet 1001 and flows radially from outside to inside, until it flows into the intermediate flow area 1002b through the oil inlet flow channel 1003, because the positions where the oil inlet flow channel 1003 and the oil outlet flow channel 1004 are communicated with the intermediate flow area 1002b are arranged in a circumferential staggered manner, the cooling medium can cover the intermediate flow area 1002b, and then flow into the oil outlet flow channel 1004, wherein the cooling medium introduced from the position where the oil inlet flow channel 1003 is communicated with the intermediate flow area 1002b flows radially from inside to outside, while flowing circumferentially to the position where the oil outlet flow channel 1004 is communicated with the intermediate flow area 1002b, until it flows into the oil outlet flow channel 1004 and flows into the oil outlet flow area 1002c through the oil outlet flow channel 1004, then the cooling medium flows radially from inside to outside in the oil outlet flow area 1002c, and finally is collected in the oil outlet 1005 and discharged through the oil outlet 1005. By separating the flow area 1002 where the core winding 120 is installed into multiple flow areas, and then using the oil inlet flow channel 1003 and the oil outlet flow channel 1004 to enable the cooling medium to flow between the flow areas, the cooling medium can uniformly pass through each flow area in the radial direction, ensuring that the cooling medium can uniformly pass through each gap, improving the cooling performance, so that the cooling mechanism can completely soak the core winding 120, compared with opening a channel in the shell and introducing cooling water, the way the cooling medium soaks the core winding 120 can reduce the temperature of the core 121 and the coil 122 that make up the core winding 120 to a lower temperature, as shown in Figure 3 , to ensure good operation of the motor and ensure reliability of the motor, while also improving operating efficiency and peak power of the motor.

[0047] It is to be noted that the intermediate flow area 1002b is divided into two flow areas, the oil inlet flow channel 1003 connects the oil inlet flow area 1002a and the right flow area, the oil outlet flow channel 1004 connects the left flow area and the oil outlet flow area 1002c, the flow direction of the cooling medium in the oil inlet flow channel 1003 and the oil outlet flow channel 1004 is opposite, so the flow direction of the cooling medium between the oil inlet flow area 1002a and the right flow area is opposite, and the flow direction of the cooling medium between the left flow area and the oil outlet flow area 1002c is opposite, the cooling medium passes through the oil inlet flow area 1002a from outside to inside in the radial direction, the cooling medium passes through the right flow area from inside to outside in the radial direction, the cooling medium passes through the left flow area from outside to inside in the radial direction, the cooling medium passes through the oil outlet flow area 1002c from inside to outside in the radial direction, and is discharged from the oil outlet 1005, so that the cooling medium uniformly passes through each flow area, thereby improving the cooling capacity. Figures 1 to 8 As shown in the figure, the shell 110 includes a peripheral plate 111 and an inner peripheral plate 113, the inner peripheral plate 113 is connected to the outer ring of the inner ring reversing flow channel assembly 112, the inner ring reversing flow channel assembly 112 and the inner peripheral plate 113 form the oil inlet flow channel 1003 and the oil outlet flow channel 1004, the inner peripheral plate 113 and the peripheral plate 111 form the flow area 1002, the oil inlet 1001 and the oil outlet 1005 are connected to the peripheral plate 111, and the inner peripheral plate 113 is provided with the oil inlet inlet 1003a, the oil inlet outlet 1003b, the oil outlet inlet 1004a and the oil outlet outlet 1004b;

[0048] A plurality of core windings 120 are arranged between the peripheral plate 111 and the inner peripheral plate 113 in the circumferential direction, the core winding 120 and the peripheral plate 111 form the winding outer ring flow channel 120a, the core winding 120 and the inner peripheral plate 113 form the winding inner ring flow channel 120c, and the adjacent two core windings 120 form the winding inter-flow channel 120b;

[0049] A plurality of blocking pieces 130 are arranged in the flow area 1002 in the circumferential direction to divide the flow area 1002 into the oil inlet flow area 1002a, the intermediate flow area 1002b and the oil outlet flow area 1002c.

[0050] The inner ring reversing flow channel assembly 112 can be spliced into the inner ring of the inner peripheral plate 113 to form the oil inlet flow channel 1003 and the oil outlet flow channel 1004, and the inner peripheral plate 113 and the inner ring reversing flow channel assembly 112 can be bonded and fixed by using glue, thereby improving the forming efficiency and reducing the processing difficulty. Figure 1 andFigure 3 The iron core winding 120 is respectively provided with a gap before the inner surrounding plate 113 and the outer surrounding plate 111 to form the winding inner circle flow channel 120c and the winding outer circle flow channel 120a respectively and ensure insulation. The inner surrounding plate 113 can be made of high-strength non-metallic materials, including glass fiber composite materials, carbon fiber composite materials or plastics such as PPS, PPA, PA, PEEK and the like, to ensure the strength of the inner surrounding plate 113 and reduce the distance between the iron core winding 120 and the inner surrounding plate 113, thereby ensuring the advantage of small overall radial size and increasing the applicability of the installation environment. In addition to high-strength non-metallic materials, the outer surrounding plate 111 and the inner ring commutation flow channel assembly 112 can also be made of high-strength metallic materials, including alloy steel or aluminum alloy and the like.

[0051] The inner ring commutation flow channel assembly 112, the outer surrounding plate 111 and the inner surrounding plate 113 can all be annular, so that the winding inner circle flow channel 120c and the winding outer circle flow channel 120a are substantially annular. Of course, the inner ring commutation flow channel assembly 112, the outer surrounding plate 111 and the inner surrounding plate 113 can also have other shapes, which are not limited herein.

[0052] As shown in Figure 1 and Figure 3 , a plurality of iron core windings 120 are arranged at equal intervals in the circumferential direction around the stator center line, and the winding inter-flow channel 120b is formed between the adjacent two iron core windings 120. The iron core winding 120 comprises an iron core 121 and a coil 122, and the coil 122 is arranged on the outer circle of the iron core 121. The iron core 121 can be made of a plurality of silicon steel sheets stacked in the radial direction or molded by SMC (soft magnetic composite material). The iron core 121 can be trapezoidal, with the upper base of the trapezoid facing inward and the lower base of the trapezoid facing outward. The coil 122 can be round copper wire or flat copper wire.

[0053] The barrier 130 is used to separate the flow area 1002 and form a corresponding number of flow zones. Referring to Figure 1 , the number of barriers 130 is three, and at this time the flow area 1002 is divided into three flow zones, namely the oil inlet flow zone 1002a, the intermediate flow zone 1002b and the oil outlet flow zone 1002c. It can be seen that the number of barriers 130, flow zones and flow channels are related to each other, that is, the number of barriers 130 is consistent with the number of flow zones, and the adjacent two flow zones can be connected by a flow channel. The barrier 130 can be made of high-strength non-metallic materials to ensure insulation. The barrier 130 can also have the following two embodiments:

[0054] In one embodiment, the barrier 130 is inserted between two adjacent core windings 120 and abuts between the outer plate 111 and the inner plate 113, as shown in Figure 7 .

[0055] In another embodiment, the barrier 130 comprises two partitions 131, and the inner plate 113 and the outer plate 111 are connected to one of the partitions 131 respectively, and the core winding 120 abuts between the two partitions 131, as shown in Figure 1 and Figure 6 Since the distance between the core winding 120 and the inner plate 113 and the outer plate 111 can be different, the size of the partition 131 constituting the barrier 130 can also be different, for example, the length of the partition 131 between the core winding 120 and the inner plate 113 is shorter, and the length of the partition 131 between the core winding 120 and the outer plate 111 is longer.

[0056] Referring to Figure 1 , the oil inlet flow area 1002a is used to communicate the oil inlet 1001, the oil outlet flow area 1002c is used to communicate the oil outlet 1005, and the intermediate flow area 1002b passes through the oil inlet flow channel 1003 and the oil outlet flow channel 1004, so that the cooling medium can flow in each flow area. The number of the oil inlet flow area 1002a and the oil outlet flow area 1002c can be only one, and the number of the intermediate flow area 1002b can be multiple, or the intermediate flow area 1002b can be further divided. The intermediate flow area 1002b is located between the oil inlet flow area 1002a and the oil outlet flow area 1002c, and the circumferential size of the oil inlet flow area 1002a and the oil outlet flow area 1002c is obviously smaller than that of the intermediate flow area 1002b. Since the flow area 1002 is divided into several flow areas, and the oil inlet 1001 and the oil outlet 1005 are arranged on the inner and outer sides of the flow area 1002 respectively by being staggered with the flow channel, the cooling medium can flow uniformly in each flow area along the radial direction, and thus each gap can be completely covered, so that the cooling performance is improved.

[0057] As Figure 1 and Figure 2As shown, the intermediate flow area 1002b can be divided by the flow guides 150, wherein the flow guides 150 are located within the intermediate flow area 1002b, the flow guides 150 are located between the oil inlet outlet 1003b and the oil outlet inlet 1004a, when the number of the flow guides 150 is one, the flow guides 150 abut between the core winding 120 and the inner surrounding plate 113. Wherein the oil outlet inlet 1004a and the oil inlet outlet 1003b are located on the left and right sides of the circumferential direction of the intermediate flow area 1002b, so that the cooling medium introduced from the oil inlet outlet 1003b moves to the left in the winding inner circle flow channel 120c, and flows to the winding outer circle flow channel 120a through each winding inter-flow channel 120b, and moves to the left in the winding outer circle flow channel 120a. Since the flow guides 150 abut between the core winding 120 and the inner surrounding plate 113 to block the cooling medium in the winding inner circle flow channel 120c, the flow guides 150 can further divide the intermediate flow area 1002b into two areas, wherein the cooling medium in the right area flows from the inside to the outside along the radial direction, and the cooling medium in the left area flows from the outside to the inside along the radial direction, and then flows to the oil outlet flow channel 1004 through the oil outlet inlet 1004a.

[0058] It should be noted that the number of flow guides 150 is odd, and two adjacent flow guides 150 are arranged on the inner and outer sides of the core winding 120 in the radial direction. Among them, the flow guides 150 close to the oil inlet outlet 1003b and the oil outlet inlet 1004a are arranged on the inner side of the core winding 120 in the radial direction, i.e. abutting between the core winding 120 and the inner surrounding plate 113, and the flow guides 150 on the outer side of the core winding 120 in the radial direction abut between the core winding 120 and the outer surrounding plate 111. In this way, the cooling medium can pass through each area divided by the flow guides 150 in an S-shaped manner, and the cooling medium can uniformly pass through each area in the radial direction, so that the core winding can be immersed in the cooling medium, thereby achieving a better cooling effect.

[0059] The flow guides 150 and the blocking pieces 130 are made of high-strength non-metallic materials, and the sum of the number of the flow guides 150 and the blocking pieces 130 can be 2N, i.e. the sum of the number of the two is even, at this time the number of the areas divided is also 2N, and the number of flow channels between two areas is 1 / 2N, wherein N=1, 2, 3…

[0060] As Figure 1 and Figure 2As shown, the oil inlet passage 1003 includes an oil inlet inlet 1003a, an oil inlet outlet 1003b, and an oil inlet channel 1003c extending between the oil inlet inlet 1003a and the oil inlet outlet 1003b, the oil inlet inlet 1003a communicates with the oil inlet flow region 1002a, the oil inlet inlet 1003a and the oil inlet port 1001 are arranged in a circumferential staggered manner, and the oil inlet outlet 1003b communicates with the intermediate flow region 1002b.

[0061] Specifically, the oil inlet port 1001 and the oil inlet inlet 1003a correspondingly communicate with the oil inlet flow region 1002a, and are arranged on the radially inner and outer sides of the oil inlet flow region 1002a and on the circumferentially opposite sides of the oil inlet flow region 1002a, so that the cooling medium introduced from the oil inlet port 1001 can flow through the oil inlet flow region 1002a in a circumferential direction and flow into the oil inlet channel 1003c through the oil inlet inlet 1003a, so that the cooling medium can uniformly pass through the oil inlet flow region 1002a. Of course, the number of oil inlet inlets 1003a and oil outlet outlets 1003b can also be multiple. The cooling medium introduced from the oil inlet port 1001 flows in the oil inlet flow region 1002a from right to left, while the cooling medium introduced from the oil inlet inlet 1003a into the oil inlet channel 1003c flows from left to right to the oil outlet outlet 1003b and is introduced into the intermediate flow region 1002b through the oil outlet outlet 1003b.

[0062] As shown in Figure 1 and Figure 2 As shown, the oil outlet passage 1004 includes an oil outlet inlet 1004a, an oil outlet outlet 1004b, and an oil outlet channel 1004c extending between the oil outlet inlet 1004a and the oil outlet outlet 1004b, the oil outlet inlet 1004a communicates with the intermediate flow region 1002b, the oil outlet inlet 1004a and the oil inlet outlet 1003b are arranged in a circumferential staggered manner, and the oil outlet outlet 1004b communicates with the oil outlet flow region 1002c, the oil outlet outlet 1004b and the oil outlet port 1005 are arranged in a circumferential staggered manner.

[0063] Specifically, the cooling medium introduced into the oil outlet channel 1004c from the oil outlet inlet 1004a flows from left to right to the oil outlet outlet 1004b and flows to the oil outlet flow area 1002c through the oil outlet outlet 1004b, wherein the oil outlet outlet 1004b and the oil outlet 1005 are arranged in a circumferential staggered manner, so that the cooling medium introduced into the oil outlet flow area 1002c from the oil outlet outlet 1004b flows from right to left to the oil outlet 1005 and converges until it is discharged through the oil outlet 1005. The number of oil outlet inlets 1004a and oil outlet outlets 1004b can also be multiple.

[0064] As shown in Figure 8 , the oil inlet inlet 1003a, the oil inlet outlet 1003b, the oil outlet inlet 1004a and the oil outlet outlet 1004b can be square or circular, etc. By adjusting the size of the number, position and size of each opening, the flow rate can be adjusted to meet the required flow rate and cooling effect, and the shape and size of each opening can be different.

[0065] Referring to Figure 1 , the oil inlet inlet 1003a is downstream of the oil inlet 1001 in the counterclockwise direction, so that the cooling medium flows counterclockwise in the oil inlet flow area 1002a, so that the flow direction of the cooling medium can be adjusted by changing the installation direction. Referring to Figure 1 and Figure 2 , the cooling medium in the oil inlet flow channel 1003 of the embodiment flows clockwise, the cooling medium in the intermediate flow area flows clockwise, the cooling medium in the oil outlet flow channel 1004 flows counterclockwise, and the cooling medium in the oil outlet flow area 1002c flows counterclockwise. Similarly, by adjusting the installation direction, the flow direction of the cooling medium in each area can be further adjusted.

[0066] In summary, the oil inlet outlet 1003b is the communication part of the oil inlet flow channel 1003 and the intermediate flow area 1002b, and the oil outlet inlet 1004a is the communication part of the oil outlet flow channel 1004 and the intermediate flow area 1002b. By staggering the oil inlet 1001 and the oil inlet inlet 1003a, the oil outlet 1005 and the oil outlet outlet 1004b, and the oil inlet outlet 1003b and the oil outlet inlet 1004a, the cooling medium can uniformly pass through each flow area, and each core winding 120 can be fully soaked to improve the cooling capacity.

[0067] As shown in Figure 5 , Figures 8 to 10The oil inlet channel 1003c and the oil outlet channel 1004c are arranged on the outer ring of the inner ring reversing flow channel assembly 112, and are arranged in an axial direction. By arranging the oil inlet channel 1003c and the oil outlet channel 1004c on the outer ring of the inner ring reversing flow channel assembly 112, and then splicing the inner surrounding plate 113 on the outer ring of the inner ring reversing flow channel assembly 112, the oil inlet flow channel 1003 is formed between the oil inlet channel 1003c and the inner surrounding plate 113, and the oil outlet flow channel 1004 is formed between the oil outlet channel 1004c and the inner surrounding plate 113, thereby reducing the processing difficulty and ensuring the stability and reliability of the structure.

[0068] As shown in Figure 3 The shell 110 further comprises:

[0069] Two bottom plates 114, which are respectively connected between the inner ring reversing flow channel assembly 112 and the outer surrounding plate 111, and the inner surrounding plate 113 and the axial ends of the iron core winding 120 are respectively connected between the two bottom plates 114.

[0070] Specifically, the outer ring of the inner ring reversing flow channel assembly 112 and the inner ring of the outer surrounding plate 111 are respectively provided with steps 116, and the two bottom plates 114 are respectively abutted and fixed on the steps 116 of the inner ring reversing flow channel assembly 112 and the outer surrounding plate 111 for pre-fixing, and then can be fixed by bolts. For example, the bottom plate 114 is provided with a bottom plate mounting hole 114b, and the step 116 is provided with a step mounting hole 116a. When the bottom plate 114 is respectively abutted on the steps 116 of the inner ring reversing flow channel assembly 112 and the outer surrounding plate 111, the bottom plate mounting hole 114b and the step mounting hole 116a are opposite, and finally the bolt is passed through the bottom plate mounting hole 114b and screwed into the step mounting hole 116a.

[0071] The bottom plate 114 is provided with a plurality of positioning grooves 114a, and the positioning grooves 114a on the two bottom plates 114 correspond one by one. The iron core 121 is inserted into the corresponding positioning grooves 114a of the two bottom plates 114, and the coil 122 outside the outer ring of the iron core 121 is located between the two bottom plates 114. The positioning grooves 114a and the iron core 121 are both trapezoidal in shape, and the iron core 121 can be fixed in the positioning grooves 114a by glue to ensure the bonding strength and improve the stability of the structure. Moreover, the iron core winding 120 can be positioned and installed on the bottom plate 114 through the positioning grooves 114a, thereby improving the installation efficiency and ensuring the installation position.

[0072] The inner surrounding plate 113 can be fixed on the two bottom plates 114 by using glue.

[0073] The bottom plate 114 is made of non-metallic material, has the characteristics of high strength, non-magnetic and non-conductive, and aims to reduce the eddy current generated by the magnetic field penetration and provide high strength support. At the same time, the thickness of the bottom plate 114 is relatively thin, which ensures that at least one end of the iron core winding 120 in the axial direction can be matched with the rotor air gap respectively, and then the single-stator double-rotor or multi-stator multi-rotor cascade type axial magnetic field motor is assembled.

[0074] As shown in Figures 3 to 5 , the two bottom plates 114 are sleeved outside the inner ring reversing flow channel assembly 112 and abut on the step 116 outside the outer circle of the bottom plate 114. At this time, the two bottom plates 114 are respectively flush with the two ends of the inner ring reversing flow channel assembly 112 in the axial direction, and one bottom plate 114 is embedded inside the outer surrounding plate 111. The reduction structure and the like can be installed on the side of the bottom plate 114 away from the iron core winding 120, and the reduction structure can be partially or entirely embedded in the area surrounded by the outer surrounding plate 111, which reasonably utilizes the space, ensures the compactness of the overall structure, and has the advantage of small volume. Since the reduction structure is installed on the outer surface of the bottom plate, it can use the cooling medium flowing between the two bottom plates 114 for heat exchange. The shaft is arranged inside the inner ring reversing flow channel assembly 112, and the bearing is arranged between the shaft and the surrounding plate 112, so that the rotor connected to the shaft can rotate relative to the iron core winding. The bearing installed in the inner ring reversing flow channel assembly 112 can also be heat-exchanged by the cooling mechanism, which reasonably utilizes the installation space and improves the cooling capacity.

[0075] The assembly method of the stator cooling structure 100 is as follows:

[0076] The inner ring reversing flow channel assembly 112, the outer surrounding plate 111, the inner surrounding plate 113, the iron core winding 120, the blocking piece 130 and the flow guide piece 150 are arranged on one bottom plate 114 as shown in the figure. Figures 1 to 7 Then, the other bottom plate 114 is closed on the other side of the inner ring reversing flow channel assembly 112 and the outer surrounding plate 111, which is convenient and fast to assemble.

[0077] Referring to Figure 1 and Figure 2 , the flow mode of the cooling medium in the stator cooling structure 100 is as follows:

[0078] The cooling medium is introduced into the oil inlet flow area 1002a from the oil inlet 1001, then flows counterclockwise in the oil inlet flow area 1002a, and fills the winding outer flow channel 120a, the winding inter-flow channel 120b and the winding inner flow channel 120c in the oil inlet flow area 1002a from outside to inside in the radial direction, until it flows into the oil inlet flow channel 1003 from the oil inlet 1003a in the winding inner flow channel 120c.

[0079] The cooling medium flows clockwise in the oil inlet flow channel 1003, i.e. from the oil inlet 1003a to the oil outlet 1003b, and is introduced into the intermediate flow area 1002b.

[0080] The intermediate flow area 1002b is divided into left and right sides by the flow guide 150. The cooling medium introduced into the intermediate flow area 1002b from the oil outlet 1003b flows counterclockwise in the intermediate flow area 1002b as a whole, while the cooling medium flows radially from inside to outside on the right side of the intermediate flow area 1002b and flows radially from outside to inside on the left side of the intermediate flow area 1002b, until it flows into the oil outlet flow channel 1004 from the oil outlet 1004a in the winding inner flow channel 120c.

[0081] The cooling medium flows counterclockwise in the oil outlet flow channel 1004, i.e. from the oil outlet 1004a to the oil outlet 1004b, and is introduced into the oil outlet flow area 1002c.

[0082] The cooling medium flows counterclockwise in the oil outlet flow area 1002c, and fills the winding outer flow channel 120a, the winding inter-flow channel 120b and the winding inner flow channel 120c in the oil outlet flow area 1002c from inside to outside in the radial direction, until it is discharged from the oil outlet 1005 in the winding inner flow channel 120c.

[0083] In summary, by separating the flow area 1002 where the iron core winding 120 is installed into multiple flow areas, and then using the oil inlet flow channel 1003 and the oil outlet flow channel 1004 to enable the cooling medium to flow between the flow areas, the cooling medium can uniformly pass through each flow area in the radial direction, ensuring that the cooling medium can uniformly pass through the gaps, improving the cooling performance, enabling the cooling mechanism to completely immerse the iron core winding 120, and compared to opening a channel inside the shell and introducing cooling water, the way the cooling medium immerses the iron core winding 120 can lower the temperature of the iron core 121 and the coil 122 that make up the iron core winding 120 to a lower temperature, ensuring good operation of the motor and ensuring the reliability of the motor, while also improving the operating efficiency and peak power of the motor. By staggering the oil inlet 1001 and the oil inlet inlet 1003a, the oil outlet 1005 and the oil outlet outlet 1004b, and the oil inlet outlet 1003b and the oil outlet inlet 1004a, the cooling medium can uniformly pass through each flow area and can fully immerse each iron core winding 120, thereby improving the cooling capacity. The inner ring reversing flow channel assembly 112 can be spliced into the inner ring of the inner surrounding plate 11 to form the oil inlet flow channel 1003 and the oil outlet flow channel 1004, and the two can be fixed by glue, improving the molding efficiency and reducing the processing difficulty.

[0084] Second embodiment

[0085] The application also provides an axial magnetic field motor comprising at least one axial magnetic field motor stator cooling structure 100 of the above-mentioned embodiments, and the axial magnetic field motor further comprises at least one rotor, and the stator cooling structure 100 axially and air-gaply holds one of the rotors.

[0086] Since the axial magnetic field motor adopts the stator cooling structure 100 of the above-mentioned embodiments, the beneficial effects of the axial magnetic field motor can refer to the stator cooling structure 100.

[0087] According to the number of rotors and stators, the axial magnetic field motor can be divided into a single-stator double-rotor axial magnetic field motor or a multi-stator double-rotor axial magnetic field motor. Among the single-stator double-rotor axial magnetic field motor, the stator cooling structure 100 is air-gaply held between the two rotors.

[0088] The axial magnetic field motor further comprises at least one bearing and a rotating shaft, the rotating shaft is arranged in the inner ring reversing flow channel assembly 112 of the stator cooling structure 100, and a bearing is arranged between the rotating shaft and the inner ring reversing flow channel assembly 112, and the rotor is fixed on the rotating shaft.

[0089] The above-described embodiments are only used to illustrate the technical ideas and features of the present application, and to enable those skilled in the art to understand and implement the present application, and cannot be used to limit the patent application range of the present application, that is, any equivalent changes or modifications made according to the disclosed spirit of the present application still fall within the patent application range of the present application.

Claims

1. An axial field electric machine stator cooling structure (100) characterized by, The utility model relates to a kind of oil flow channel assemblies, including: Shell (110), annular cavity (1101) and shaft sleeve hole (1102) are provided on the shell (110); Several core windings (120), the core winding (120) includes core (121) and coil (122) sleeved on the core (121), several core windings (120) are installed in annular cavity (1101) and form flow area (1002) with the shell (110), the flow area (1002) includes oil inlet flow area (1002a), intermediate flow area (1002b) and oil outlet flow area (1002c), the oil inlet flow area (1002a), the intermediate flow area (1002b) and the oil outlet flow area (1002c) are arranged along the circumferential interval; Inner ring reversing flow channel assembly (112), 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 oil inlet flow channel (1003) and oil outlet flow channel (1004), the oil inlet flow channel (1003) is communicated between the oil inlet flow area (1002a) and the intermediate flow area (1002b), the oil outlet flow channel (1004) is communicated between the intermediate flow area (1002b) and the oil outlet flow area (1002c), the oil inlet flow channel (1003) and the oil outlet flow channel (1004) are respectively communicated with the part of intermediate flow area (1002b) and are arranged along the circumferential staggered portion; The oil inlet flow channel (1003) includes oil inlet inlet (1003a), oil inlet outlet (1003b) and oil inlet passage (1003c) extendedly connected between the oil inlet inlet (1003a) and the oil inlet outlet (1003b), the oil inlet inlet (1003a) is communicated with the oil inlet flow area (1002a), the outer periphery of the shell (110) is provided with oil inlet (1001), the oil inlet inlet (1003a) and the oil inlet (1001) are arranged along the circumferential staggered portion, and the oil inlet outlet (1003b) is communicated with the intermediate flow area (1002b); The oil outlet flow channel (1004) includes oil outlet inlet (1004a), oil outlet outlet (1004b) and oil outlet passage (1004c) extendedly connected between the oil outlet inlet (1004a) and the oil outlet outlet (1004b), the oil outlet inlet (1004a) is communicated with the intermediate flow area (1002b), the oil outlet inlet (1004a) and the oil inlet outlet (1003b) are arranged along the circumferential staggered portion, the oil outlet outlet (1004b) is communicated with the oil outlet flow area (1002c), and the oil outlet outlet (1004b) and the oil outlet (1005) on the peripheral plate (111) of the shell (110) are arranged along the circumferential staggered portion. The oil inlet passage (1003c) and the oil outlet passage (1004c) are arranged in an axial direction, the oil inlet inlet (1003a), the oil outlet outlet (1004b), the oil inlet outlet (1003b) and the oil outlet inlet (1004a) are sequentially arranged in an anticlockwise direction, the oil inlet passage (1003c) is communicated between the oil inlet inlet (1003a) and the oil inlet outlet (1003b) in a clockwise direction, and the oil outlet passage (1004c) is communicated between the oil outlet inlet (1004a) and the oil outlet outlet (1004b) in an anticlockwise direction.

2. The axial magnetic field motor stator cooling structure (100) of claim 1, characterized in that: The shell (110) comprises a peripheral plate (111) and an inner peripheral plate (113), the inner ring reversing flow channel assembly (112) is connected to the inner circle of the inner peripheral plate (113), the inner ring reversing flow channel assembly (112) and the inner peripheral plate (113) form the oil inlet flow channel (1003) and the oil outlet flow channel (1004), the inner peripheral plate (113) and the peripheral plate (111) form the flow area (1002), and the peripheral plate (111) is provided with an oil inlet (1001) and an oil outlet (1005); A plurality of the core windings (120) are arranged in a circumferential direction between the peripheral plate (111) and the inner peripheral plate (113), the core winding (120) and the peripheral plate (111) form the winding outer circle flow channel (120a), the core winding (120) and the inner peripheral plate (113) form the winding inner circle flow channel (120c), and the winding inter-flow channel (120b) is formed between adjacent two core windings (120); A plurality of blocking pieces (130) are arranged in a circumferential direction in the flow area (1002) to separate the flow area (1002) into the oil inlet flow area (1002a), the intermediate flow area (1002b) and the oil outlet flow area (1002c).

3. The axial field electric machine stator cooling structure (100) of claim 2, wherein, Further comprising: At least one flow guide (150) is located in the intermediate flow area (1002b), the flow guide (150) is located between the oil inlet outlet (1003b) and the oil outlet inlet (1004a), and at least one flow guide (150) abuts between the core winding (120) and the inner peripheral plate (113).

4. The axial field electric machine stator cooling structure (100) of claim 2, wherein, The oil inlet passage (1003c) and the oil outlet passage (1004c) are arranged in the outer circle of the inner ring reversing flow channel assembly (112), and the oil inlet inlet (1003a), the oil inlet outlet (1003b), the oil outlet inlet (1004a) and the oil outlet outlet (1004b) are arranged on the inner peripheral plate (113).

5. The axial field electric machine stator cooling structure (100) of claim 2, wherein, The blocking piece (130) is inserted between adjacent two core windings (120) and abuts between the peripheral plate (111) and the inner peripheral plate (113). Alternatively, the barrier (130) comprises two partitions (131), the inner ring (113) and the outer ring (111) are connected to the partitions (131) respectively, and the core winding (120) abuts between the two partitions (131).

6. The axial field electric machine stator cooling structure (100) of claim 2, wherein, The shell (110) further comprises: Two bottom plates (114), the two bottom plates (114) are connected between the inner ring commutation flow channel assembly (112) and the outer ring (111) respectively, and the inner ring (113) and the axial ends of the core winding (120) are connected between the two bottom plates (114) respectively.

7. The axial field electric machine stator cooling structure (100) of claim 6, wherein, A plurality of positioning grooves (114a) are formed on the bottom plate (114), the positioning grooves (114a) on the two bottom plates (114) correspond to each other, the core (121) is inserted into the corresponding positioning grooves (114a) of the two bottom plates (114), and the coil (122) sleeved on the outer ring of the core (121) is located between the two bottom plates (114).

8. An axial field electric machine characterized by The axial magnetic field motor further comprises at least one rotor, at least one bearing and a rotating shaft, the rotating shaft is arranged in the inner ring (111) of the stator cooling structure (100), a bearing is arranged between the rotating shaft and the inner ring (111), at least one side of the stator cooling structure (100) is air gaply kept with the rotor, and the rotor is fixed on the rotating shaft.

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