CN219086975U - Stator and axial magnetic field motor - Google Patents

Abstract

The utility model provides a stator and an axial magnetic field motor, wherein the stator comprises a cooling disc and an iron core winding unit, a plurality of stator sleeve holes are formed in the cooling disc, a runner is formed in the cooling disc, the runner surrounds the periphery of each stator sleeve hole, the iron core winding unit comprises a stator iron core and a coil assembly, the stator iron core comprises a plurality of tooth blocks which are circumferentially arranged at intervals, the coil assembly is sleeved outside each tooth block, the cooling disc is sleeved on the stator iron core in a one-to-one correspondence manner of the stator sleeve holes and the tooth blocks, so that the coil assembly is limited between the cooling disc and the stator iron core, heat dissipation performance can be improved, and a coil is prevented from being separated from the stator iron core.

Description

Stator and axial magnetic field motor

Technical Field

The utility model relates to the field of axial magnetic field motors, in particular to a stator and an axial magnetic field motor.

Background

The motor is an electromagnetic device for converting or transmitting electric energy according to the law of electromagnetic induction, and the main function of the motor is to generate driving torque as a power source of electric appliances or various machines. The motor can be classified into a radial magnetic field motor and an axial magnetic field motor, and the axial magnetic field motor is also called a disk motor, has the characteristics of small volume, light weight, short axial dimension, high power density and the like, can be used in most thin installation occasions, and is widely used.

The motor comprises a shell, and a stator and a rotor which are arranged in the shell, wherein the stator is an electric static part and mainly comprises an iron core and a coil wound on the iron core, the coil is formed by winding an enamelled wire, and the stator is used for generating a rotating magnetic field so that the rotor is cut by magnetic lines of force in the magnetic field to generate current. During operation of the motor, a lot of heat is generated inside, most of which is generated by the coil, resulting in an increase in the temperature of the coil. If the temperature of the coil is too high, an insulating layer on the surface of the coil can be damaged, short circuit occurs between enameled wires, and the motor is burnt out; in addition, the permanent magnet on the rotor can generate a part of heat, and the permanent magnet can be demagnetized when the temperature is too high, so that the motor performance is reduced, and therefore, the motor is required to be provided with a cooling structure to realize cooling.

The cooling structure of the existing motor is mostly disposed on the casing in a water channel manner, taking the dual-stator single-rotor axial magnetic field motor as an example, referring to fig. 1, the rotor 2000 is kept between two stators 1000 in an air gap manner and is integrally encapsulated in the casing 3000, wherein the casing 3000 includes a bottom plate 3100 abutting against the stator core 1100, and a water channel c is disposed in the casing to cool the motor, but the rotor 2000 and the coil 1200 are respectively far away from the water channels c on two sides, so that the heat of the rotor 2000 needs to be transferred to the water channel c through the air gap a, the stator core 1100, the slot wedge b, the coil 1200 and other components, and the heat of the coil 1200 needs to be transferred to the water channel c through the insulating paper 1201 and the stator core 1100, so that the heat transfer path between the rotor 2000 and the coil 1200 is long, resulting in large conduction heat resistance and low heat dissipation efficiency.

Disclosure of Invention

In order to solve the above problems, the present utility model provides a cooling structure disposed inside a motor and effectively adjacent to a rotor, a coil and a stator core to improve heat dissipation performance, and a stator and an axial field motor having the cooling structure.

According to one object of the utility model, the stator comprises a cooling disc and an iron core winding unit, wherein a plurality of stator sleeve holes are formed in the cooling disc, a runner is formed in the cooling disc, the runner surrounds the periphery of each stator sleeve hole, the iron core winding unit comprises a stator iron core and a coil assembly, the stator iron core comprises a plurality of circumferentially spaced tooth blocks, the coil assembly is sleeved outside each tooth block, and the cooling disc is sleeved on the stator iron core in a one-to-one corresponding mode of the stator sleeve holes and the tooth blocks, so that the coil assembly is limited between the cooling disc and the stator iron core.

As a preferred embodiment, the stator core further includes a yoke plate, the tooth block is fixed to the yoke plate, and the coil assembly is abutted between the yoke plate and the cooling plate.

As a preferable embodiment, both sides of the tooth block in the circumferential direction are respectively recessed inwards to form a concave part, the coil assemblies are embedded in the concave parts, and the cooling disc is clamped between two adjacent coil assemblies so as to be abutted against the yoke disc.

As a preferred embodiment, the flow channel includes an outer ring flow channel, an inner ring flow channel, and a plurality of branch flow channels connected between the outer ring flow channel and the inner ring flow channel, and the stator sleeve hole is formed between two adjacent branch flow channels.

As a preferred embodiment, a plurality of blocking pieces are respectively arranged in the outer ring runner and the inner ring runner, and the blocking pieces in the outer ring runner and the inner ring runner are staggered.

As a preferred embodiment, both sides of the coil in the circumferential direction are wrapped with insulating paper, respectively.

As a preferred embodiment, the number of the iron core winding units is two, and the tooth blocks of the two iron core winding units are in one-to-one correspondence and are integrally connected through the yoke disc to form a whole.

According to another object of the present utility model, there is also provided an axial field motor comprising the stator of the above embodiment, the axial field motor further comprising a rotor and a casing, the casing comprising two housings, each housing having one of the stators mounted therein, the stators being connected in opposition by the two housings so that the rotor is held in air gap between the two stators.

As a preferred embodiment, the outer ring runner extends outwards to form adjacent inlet and outlet sections, the inlet and outlet sections are separated by a partition plate to form adjacent inlet and outlet parts, and the outer side plate is provided with bayonets through which the inlet and outlet sections pass.

According to another object of the present utility model, there is provided an axial field motor including the stator of the above embodiment, the axial field motor further including a rotor and a casing, the casing including an outer plate and two bottom plates, the two cooling plates of the stator being respectively engaged with both ends of the outer plate, so that two integrally connected core winding units are fixed between the two cooling plates, both ends of the outer plate being closed by the bottom plates, and the rotor being located between the cooling plates and the bottom plates.

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

the cooling disc can be arranged inside the motor and positioned between the stator and the rotor, wherein the rotor opposite surface of the cooling disc faces the rotor, the stator opposite surface faces the stator, and then cooling medium is introduced into the flow channel, so that heat of the rotor and the stator is subjected to heat transfer through flowing cooling medium, and compared with a traditional shell water channel arrangement mode, the heat transfer paths between the rotor and the stator and the cooling structure are shortened, and further the heat dissipation effect is effectively improved, so that the reliable operation of the motor is ensured. And through omitting the setting of casing water course, can simplify the structure to reduce the processing degree of difficulty and cost, the cooling plate still is provided with the runner for the even circulation flow of coolant provides effective guarantee for the cooling effect, wherein the cooling plate can the butt coil assembly or block between two adjacent coil assemblies, not only can promote heat dispersion, can also play the coil and break away from stator core's effect, compared with prior art promptly, omitted the slot wedge structure, reduced motor spare part, reduce cost, and effectively promote assembly efficiency.

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings.

Drawings

FIG. 1 is a schematic diagram of a conventional axial field motor;

FIG. 2 is a schematic view of a first embodiment of a cooling structure according to the present utility model;

FIG. 3 is an internal schematic view of a first embodiment of the cooling structure according to the present utility model;

FIG. 4 is a schematic view of a cooling structure according to a second embodiment of the present utility model;

FIG. 5 is a side view of a second embodiment of the cooling structure of the present utility model;

FIG. 6 is a cross-sectional view taken along line A-A of FIG. 5;

FIG. 7 is a cross-sectional view taken along B-B in FIG. 5;

FIG. 8 is a schematic view of a flow path in a second embodiment of a cooling structure according to the present utility model;

fig. 9 is a schematic structural view of a first embodiment of a stator according to the present utility model;

fig. 10 is a schematic structural view of a stator core according to a first embodiment of the present utility model;

FIG. 11 is a schematic view showing the structure of a coil assembly in a first embodiment of the stator according to the present utility model;

FIG. 12 is a schematic view of a stator according to a second embodiment of the present utility model;

fig. 13 is a schematic view showing the cooperation of a stator core and a coil assembly in a second embodiment of the stator according to the present utility model;

fig. 14 is a schematic structural view of a stator core according to a second embodiment of the present utility model;

FIG. 15 is a schematic view showing the structure of a coil assembly in a second embodiment of the stator according to the present utility model;

fig. 16 is a schematic structural view of a stator core according to a third embodiment of the present utility model;

fig. 17 is a schematic structural view of a fourth embodiment of a stator according to the present utility model;

fig. 18 is a schematic structural view of a stator core according to a fourth embodiment of the present utility model;

FIG. 19 is a schematic view of a stator according to a fifth embodiment of the present utility model;

fig. 20 is a schematic view showing the cooperation of a stator core and a coil assembly in a fifth embodiment of a stator according to the present utility model;

FIG. 21 is a schematic view of a first embodiment of an axial field motor according to the present utility model;

FIG. 22 is a schematic view of the cooling plate and stator core mating of the first embodiment of the axial field motor of the present utility model;

FIG. 23 is a schematic view of the housing and stator core mating in a first embodiment of an axial field motor according to the present utility model;

fig. 24 is a schematic structural view of a housing in the first embodiment of the axial field motor according to the present utility model;

FIG. 25 is a schematic view of a second embodiment of an axial field motor according to the present utility model;

FIG. 26 is a schematic view of the structure of the outer plate of the axial field motor according to the second embodiment of the present utility model;

FIG. 27 is a schematic view of a third embodiment of an axial field motor according to the present utility model;

FIG. 28 is a schematic view of a fourth embodiment of an axial field motor according to the present utility model;

FIG. 29 is a schematic view of a fifth embodiment of an axial field motor according to the present utility model;

fig. 30 is a schematic structural view of an outer plate of the axial field motor according to the fourth embodiment of the present utility model.

Detailed Description

The following description is presented to enable one of ordinary skill in the art to make and use the utility model. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the utility model defined in the following description may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the utility model.

As shown in fig. 2 to 8, the cooling structure 1300a, 1300b includes a cooling disc 1310, where the cooling disc 1310 includes a rotor opposite surface 1311, a stator opposite surface 1312, and a plurality of stator casing holes 1313 penetrating the rotor opposite surface 1311 and the stator opposite surface 1312, and a flow passage 1314 is further disposed between the rotor opposite surface 1311 and the stator opposite surface 1312, and the flow passage 1314 surrounds each of the stator casing holes 1313.

The cooling disc 1310 may be disposed inside the motor and between the stator and the rotor, wherein the rotor opposite surface 1311 of the cooling disc 1310 faces the rotor, the stator opposite surface 1312 faces the stator, and then the cooling medium including liquid or gas is introduced into the flow passage 1314, so that heat of the rotor and the stator is transferred through the flowing cooling medium, and compared with the conventional case water channel arrangement, the heat transfer paths between the rotor and the stator and the cooling structures 1300a and 1300b are shortened, thereby effectively improving the heat dissipation effect and ensuring reliable operation of the motor. In addition, the structure can be simplified and the processing difficulty and cost can be reduced by omitting the arrangement of the water channel of the casing, in addition, the stator sleeve holes 1313 correspond to the tooth blocks of the stator core, the flow channels 1314 surround the periphery of each stator sleeve hole 1313, and the heat dissipation effect on the motor is further improved.

Fig. 2 and 3 show a schematic structural view of a first embodiment cooling structure 1300a, in which the number of cooling discs 1310 is one, and the overall shape is substantially flat disc-like, so that the advantage of small axial dimension of the axial field motor can be ensured. The cooling structure 1300a of the first embodiment is applicable to a single-rotor single-stator, single-rotor double-stator axial field motor.

Referring to fig. 3, the runner 1314 includes an outer runner 13141, an inner runner 13142, and a plurality of branch runners 13143 connected between the outer runner 13141 and the inner runner 13142, and the stator casing hole 1313 is formed between two adjacent branch runners 13143.

Specifically, the inner ring runner 13142 and the outer ring runner 13141 are arranged from inside to outside, and the plurality of branch runners 13143 are arranged at intervals circumferentially, so that the stator sleeve hole 1313 is formed between two adjacent branch runners 13143, when the tooth block of the stator core is inserted into the stator sleeve hole 1313, the inner ring runner 13142 and the outer ring runner 13141 are correspondingly arranged on two radial sides of the tooth block, and the branch runners 13143 are respectively corresponding on two circumferential sides of the tooth block, so that the runner 1314 surrounds the periphery of the tooth block, thereby improving the heat dissipation performance of the stator core. Wherein the stator bore 1313 and the tooth block are adapted in shape, for example, both in the shape of a sector, see fig. 2 and 3.

With continued reference to fig. 3, a plurality of blocking members 1315 are disposed within the outer and inner annular runners 13141, 13142, respectively, and the blocking members 1315 located within the outer and inner annular runners 13141, 1314 are staggered. In this way, the cooling medium can flow back and forth between the outer ring runner 13141 and the inner ring runner 1314 through the branch runner 13143, so that the flow resistance is reduced to a certain extent, and the heat dissipation effect is improved.

The blocking member 1315 located in the outer ring runner 13141 is located between two adjacent branch runners 13143, so that the cooling medium can pass through and enter the inner ring runner 13142 along the branch runners 13143, then be blocked by the blocking member 1315 in the inner ring runner 13142, and enter the outer ring runner 13141 through the other branch runner 13143, so as to circulate, and make the cooling medium pass through the runners 1314 in turn in the circumferential direction, so as to realize the flow of the cooling medium.

With continued reference to fig. 3, the outer annular flow passage 13141 extends outwardly to form adjacent inlet and outlet segments 1316, the inlet and outlet segments 1316 being separated by a divider 13163 to form adjacent inlet and outlet portions 13161, 13162. The inlet portion 13161 and the outlet portion 13162 are blocked by the partition 13163, so that the cooling medium introduced from the inlet portion 13161 can only pass through the flow passage 1314 counterclockwise and then be led out from the outlet portion 13162, and the inlet portion 13161 and the outlet portion 13162 are adjacent and concentrated, so that the cooling contact area of the flow passage 1314 is increased, and the cooling performance is improved.

The cooling disc 1310 may be made of a material with higher strength and thermal conductivity, and weaker magnetic conductivity and electrical conductivity, such as alumina or aluminum alloy, so as to ensure better cooling performance of the cooling disc 1310, and avoid the influence of the arrangement of the cooling disc 1310 on the working performance of the motor.

Fig. 4 to 8 show a schematic structural view of a cooling structure 1300b of a second embodiment, in which the number of cooling discs 1310 is two, and the cooling structure further includes connection pipes 1320, the connection pipes 1320 respectively connect the stator opposite faces 1312 of the two cooling discs 1310 so that the rotor opposite faces 1311 of the two cooling discs 1310 are externally arranged, and the stator casing holes 1313 of the two cooling discs 1310 are in one-to-one correspondence.

The cooling structure 1300b of the second embodiment may be applied to a dual-rotor single-stator axial magnetic field motor, wherein the stator is sleeved outside the connecting pipe 1320 and is disposed between the two cooling plates 1310, and at this time, two axial sides of the stator correspond to the stator opposite faces 1312 of the cooling plates 1310, and two rotors correspond to the rotor opposite faces 1311 of each cooling plate 1310 and are disposed outside the cooling structure 1300 b.

The cooling structure 1300b of the second embodiment may be the same as the first embodiment, in which each cooling disc 1310 performs independent cooling medium introduction and extraction, and of course, the cooling medium flows back and forth between the two cooling discs 1310 through the connection pipe 1320, so as to increase the contact area between the cooling medium and the stator, and improve the cooling performance. Referring to fig. 6 to 8, a plurality of blocking members 1315 are respectively disposed in the outer ring runner 13141 and the inner ring runner 13142, and the blocking members 1315 disposed in the outer ring runner 13141 and the inner ring runner 13142 are disposed opposite to each other to divide the runner 1314 into a plurality of circumferentially arranged chambers 13140, and the chambers 13140 disposed in the two cooling plates 1310 are disposed in a staggered manner in the circumferential direction and are communicated through the connection pipe 1320, so that a cooling medium sequentially passes back and forth through the chambers 13140 of the two cooling plates 1310.

Specifically, the connection pipe 1320 is circumferentially divided into a plurality of pipe portions 1322, referring to fig. 8, since the chambers 13140 of the two cooling plates 1310 are circumferentially staggered, the chambers 13140 of one cooling plate 1310 are respectively connected to the two pipe portions 1322 to correspond to the two chambers 13140 of the other cooling plate 1310, so that the cooling medium flows back and forth in the chambers 13140 of the two cooling plates 1310 through the pipe portions 1322 in sequence, and the stator is sleeved outside the connection pipe 1320, so that the heat transfer can be performed inside the stator through the pipe portions 1322.

As shown in fig. 6 and 7, the connection pipe 1320 is connected to the inner ring runner 13142 so that corresponding inlet ports 13144 and discharge ports 13145 are formed in each of the inner ring runners 13142 of the two cooling plates 1310, and are located on the same inner ring runner 13142 with being blocked between the adjacent inlet ports 13144 and discharge ports 13145.

Further, the inlet 13144 and the outlet 13145 respectively correspond to two ends of the pipe portion 1322, referring to fig. 8, that is, after the cooling medium in the outer ring runner 13141 flows to the inner ring runner 13142 through the branch runner 13143, the cooling medium enters the pipe portion 1322 through the outlet 13145 thereon, then enters the chamber 13140 of the other cooling disc 1310, specifically, enters the inlet 13144 of the inner ring runner 13142 of the chamber 13140, then flows to the outer ring runner 13141 through the branch runner 13143, so that the cooling medium flows back and forth in the chambers 13140 of the two cooling discs 1310 sequentially through the pipe portion 1322.

Further, the inlet port 13144 and the discharge port 13145 are disposed at a spacing on the same inner annular runner 13142, and a baffle 1317 for blocking is provided between adjacent inlet port 13144 and discharge port 13145. Wherein each of the chambers 13140 corresponds to one inlet 13144 and one outlet 13145, respectively, and the inlet 13144 and the outlet 13145 correspond to two of the chambers 13140 of the other cooling disc 1310, respectively. And a baffle 1317 is provided between the inlet 13144 and the discharge port 13145 to prevent the cooling medium from directly flowing through the inlet 13144 and the discharge port 13145 without flowing on the outer ring flow passage 13141 and the branch flow passage 13143, thereby affecting the cooling performance. Specifically, the cooling medium introduced from the inlet 13144 is blocked by the baffle 1317 and thus can flow only through the branch flow passage 13143 to the outer ring flow passage 13141 and then through the other branch flow passage 13143 to the discharge port 13145, so that the cooling medium can flow on all of the outer ring flow passage 13141, the inner ring flow passage 13142, and the branch flow passage 13143.

As shown in fig. 4 to 8, the outer ring flow channel 13141 of the cooling disc 1310 extends outwards to form an inlet/outlet section 1316, wherein the inlet/outlet section 1316 of one cooling disc 1310 is used for leading out cooling medium, and the inlet/outlet section 1316 of the other cooling disc 1310 is used for leading in cooling medium.

The inlet/outlet section 1316 for introducing the cooling medium is connected to the chamber 13140 of the cooling disc 1310, and the inlet 13144 of the chamber 13140 is removed, that is, the inlet 13144 of the chamber 13140 is replaced with the inlet/outlet section 1316 for introducing the cooling medium. Similarly, the inlet/outlet section 1316 for the cooling medium to be introduced communicates with the chamber 13140 of the cooling disc 1310, and the discharge port 13145 of the chamber 13140 is removed.

As shown in fig. 5, the connection pipe 1320 is divided into two pipes 1321 from the middle, and each of the pipes 1321 is respectively connected to one of the cooling disks 1310, so that the two cooling disks 1310 are respectively inserted through the pipes 1321 from both ends of the stator to facilitate assembly. The two pipe bodies 1321 can be connected by adopting a clamping connection mode, a sleeving connection mode and the like, and even sealing structures such as a sealing ring and the like can be additionally arranged to improve the sealing performance and prevent the cooling medium from leaking.

In summary, the cooling disc 1310 may be disposed inside the motor and between the stator and the rotor, wherein the rotor opposite surface 1311 of the cooling disc 1310 faces the rotor, the stator opposite surface 1312 faces the stator, and then the cooling medium is introduced into the flow passage 1314, so that heat of the rotor and the stator is transferred through the flowing cooling medium, and compared with the conventional case water channel arrangement, the heat transfer paths between the rotor and the stator and the cooling structures 1300a and 1300b are shortened, thereby effectively improving the heat dissipation effect and ensuring reliable operation of the motor. And through omitting the setting of casing water course, can simplify the structure to processing degree of difficulty and cost have been reduced, cooling dish 1310 still is provided with runner 1314 for the even circulation flow of coolant medium provides effective guarantee for the cooling effect, in addition the quantity of cooling dish 1310 can be one or two, can be applied to different grade type's axial magnetic field motor, and then promotes the suitability.

Fig. 9 to 11 show a schematic structural diagram of a stator 1000a according to a first embodiment, where the stator 1000a includes a cooling structure 1300a according to the foregoing embodiment, the stator 1000a further includes core winding units, the number of the core winding units is the same as that of the cooling discs 1310, the core winding units include a stator core 1100 and a coil assembly 1200, the stator core 1100 includes a yoke 1110 and a plurality of tooth blocks 1120, the plurality of tooth blocks 1120 are circumferentially spaced on the yoke 1110, a coil assembly 1200 is sleeved outside each tooth block 1120, the cooling discs 1310 are sleeved on the stator core 1100 in a one-to-one correspondence manner with the stator sleeve holes 1313 and the tooth blocks 1120, and the rotor opposite faces 1311 of the cooling discs 1310 are disposed outwards with respect to the yoke 1110, referring to fig. 2 and 3.

Since the stator 1000a employs the cooling structure 1300a of the above-described embodiment, the advantageous effects of the stator 1000a can be referred to the cooling structure 1300a of the above-described embodiment. The stator core 1100 may be wound from a silicon steel sheet.

Referring to fig. 10, the yoke 1110 has a ring shape, the tooth block 1120 is connected to the inner and outer edges of the yoke 1110 in an extending manner, and the tooth block 1120 is in a fan shape according to the shape of the stator sleeve hole 1313, referring to fig. 2 and 3.

Referring to fig. 9 and 11, the coil assembly 1200 is adapted to the shape of the tooth block 1120 in a ring-shaped structure of a fan shape so as to surround the circumference of the tooth block 1120. Wherein the height of the tooth block 1120 is higher than the height of the coil block 1200, such that when the coil block 1200 is sleeved on the tooth block 1120, a protruding portion of the tooth block 1120 opposite to the coil block 1200 is correspondingly inserted into a stator sleeve hole 1313 of the cooling disc 1310, so that a stator opposite surface 1312 of the cooling disc 1310 abuts against the coil block 1200, and the coil block 1200 is located between the yoke disc 1110 and the cooling disc 1310, refer to fig. 9. It can be seen that the tooth block 1120 and the coil assembly 1200 are respectively in contact with the cooling disc 1310, so as to improve the heat dissipation performance of the core winding unit. And the cooling disc 1310 plays a role of preventing the coil from being separated from the stator core 1100, that is, compared with the prior art, a slot wedge structure is omitted, motor parts are reduced, cost is reduced, and assembly efficiency is effectively improved.

Referring to fig. 11, the coil assembly 1200 includes a coil 1201, and an insulating and heat-conducting structure may be provided between the coil 1201 and the cooling plate 1310 to ensure insulation between the coil 1201 and the cooling plate 1310, heat transfer, and the like. Referring to fig. 11, the insulating and heat conducting structure may be an insulating paper 1202, and the two circumferential sides of the coil 1201 are wrapped with the insulating paper 1202, so that insulation between the coil 1201 and the cooling disc 1310 is ensured, and heat of the coil 1201 can be transferred to the cooling disc 1310 through the insulating paper 1202.

Fig. 12 to 15 are schematic structural views of a stator 1000b according to a second embodiment, which is different from the first embodiment in that two circumferential sides of the tooth block 1120 are respectively recessed inwards to form a recess 1121, the coil assemblies 1200 are embedded in the recess 1121, and the cooling disc 1310 is clamped between two adjacent coil assemblies 1200, so that the stator opposite surfaces 1312 of the cooling disc 1310 abut against the yoke disc 1110. The contact areas between the cooling plates 1310 and the stator core 1100 and the coil assembly 1200, respectively, are further increased, thereby further improving heat dissipation performance.

Referring to fig. 12 to 14, the recess 1121 extends from a position where the tooth block 1120 is connected to the yoke plate 1110 and in a height direction of the tooth block 1120, wherein the recess 1121 extends to a height smaller than the height of the tooth block 1120, so that the tooth block 1120 can be in contact with the cooling plate 1310 when the cooling plate 1310 is engaged between the adjacent two coil assemblies 1200.

The insulating and heat conducting structure between the coil 1201 and the cooling disc 1310 may be made of a high heat conducting alumina sheet or coating, and the bonding surface is filled with heat conducting silicone grease or heat conducting glue.

Fig. 16 shows a schematic structural diagram of a stator 1000c according to a third embodiment, which is different from the first embodiment in that the number of the core winding units and the number of the cooling plates 1310 are two, the two core winding units are opposite to each other and integrally connected through the yoke 1110 to form a whole, and the tooth blocks 1120 of the two core winding units are in one-to-one correspondence, so that the two cooling plates 1310 are externally arranged at two sides of the two integrally connected core winding units. The stator 1000c of the third embodiment is applicable to an axial field motor having a single stator and a double rotor.

Fig. 17 and 18 show a schematic structural diagram of a stator 1000d of a fourth embodiment, which is different from the second embodiment in that the number of the core winding units and the number of the cooling plates 1310 are two, and the two core winding units are opposite to each other and integrally connected through the yoke plate 1110 to form a whole, and the tooth blocks 1120 of the two core winding units are in one-to-one correspondence, so that the two cooling plates 1310 are externally arranged at both sides of the two integrally connected core winding units. The fourth embodiment stator 1000c is applicable to a single stator dual rotor axial field motor.

Fig. 19 and 20 show schematic structural diagrams of a stator 1000d according to a fifth embodiment, which includes a cooling structure 1300b according to the second embodiment and two core winding units, wherein the tooth blocks 1120 of the two core winding units are in one-to-one correspondence and integrally connected by the yoke 1110 to form a whole, the whole structure may be sleeved outside the connecting pipe 1320 and be disposed between the two cooling plates 1310, at this time, two axial sides of the whole structure respectively correspond to the stator opposite surfaces 1312 of the two cooling plates 1310, and the rotor opposite surfaces 1311 are disposed outside the two axial sides of the cooling structure 1300 b. The stator 1000c of the fifth embodiment is applicable to an axial field motor having a single stator and a double rotor.

Wherein the tooth block 1120 may have the same shape as the third embodiment such that the coil assembly 1200 is located between the yoke disc 1110 and the cooling disc 1310, the stator facing surface 1312 of the cooling disc 1310 abuts the coil assembly 1200.

Of course, the shape of the tooth block 1120 may be the same as that of the fourth embodiment, referring to fig. 12 to 15, two circumferential sides of the tooth block 1120 are respectively recessed inward to form a recess 1121, the coil assemblies 1200 are embedded in the recess 1121, and the cooling disc 1310 is engaged between two adjacent coil assemblies 1200, so that the stator opposite surfaces 1312 of the cooling disc 1310 abut against the yoke disc 1110.

In the first to fifth embodiments of the stator, the height of the tooth block 1120 is consistent with the thickness of the cooling disc 1310, so that the cooling disc 1310 and the tooth block 1120 are flush when the cooling disc 1310 is mounted to the core winding unit, thereby exhibiting the advantage of small overall axial dimensions.

As shown in fig. 28, a stator 1000f of the sixth embodiment includes a cooling structure 1300a of the first embodiment, the stator 1000f further includes an iron core winding unit, the iron core winding unit includes a stator core 1100 and a coil assembly 1200, the stator core 1100 includes a plurality of circumferentially spaced tooth blocks 1120, each tooth block 1120 is sleeved with one coil assembly 1200, the cooling disc 1310 is sleeved on the stator core 1100 in a one-to-one correspondence manner with the stator sleeve holes 1313 and the tooth blocks 1120, and the rotor opposite surfaces 1311 of the cooling disc 1310 are disposed outwards.

Referring to fig. 28, the number of the core winding units is equal to that of the cooling discs 1310, and the two core winding units are in one-to-one correspondence with the tooth blocks 1120 and integrally connected to form a whole, so that the two cooling discs 1310 are externally arranged on two sides of the two integrally connected core winding units. The stator 1000f of the sixth embodiment may employ a single stator dual rotor perimeter field motor.

As shown in fig. 29, the stator 1000g of the seventh embodiment is different from the sixth embodiment in that it employs the cold zone structure 1300b of the second embodiment, and similarly, the stator 1000g of the seventh embodiment can be applied to a single-stator double-rotor axial magnetic field motor.

In summary, the cooling disc 1310 is sleeved on the stator core 1100 in a one-to-one correspondence manner between the stator sleeve hole 1313 and the tooth block 1120, and the rotor opposite surface 1311 of the cooling disc 1310 is disposed outwards relative to the yoke disc 1110, where the cooling disc 1310 can abut against the coil assembly 1200 or be clamped between two adjacent coil assemblies 1200, so that not only can the heat dissipation performance be improved, but also the effect of preventing the coil from separating from the stator core 1100 can be achieved, i.e., compared with the prior art, the slot wedge structure is omitted, the motor parts are reduced, the cost is reduced, and the assembly efficiency is effectively improved. In addition, the motor can be applied to different types of axial magnetic field motors, so that the applicability is improved.

As shown in fig. 21 to 27, the present utility model further provides an axial magnetic field motor including the stators 1000a to 1000f of the above-described embodiments, the axial magnetic field motor further including a rotor 2000 and a casing 3000, the stators 1000a to 1000f being enclosed inside the casing 3000 in such a manner that the rotor-facing surface 1311 faces the rotor 2000. Since the axial field motor adopts the stators 1000a to 1000f of the above embodiments, the beneficial effects of the axial field motor can be referred to 1000a to 1000f of the above embodiments.

The axial field motor may be classified into a single rotor single stator motor, a single rotor double stator motor, a double rotor single stator motor, and the like according to the number of the stators 1000a to 1000f and the number of the rotors 2000. The following is a detailed description of three embodiments:

fig. 21 to 24 show schematic structural views of the axial field motor of the first embodiment, which employs stators 1000a to 1000b of the first and second embodiments, wherein the number of the cooling plates 1310 and the core winding units of the stators 1000a to 1000b is one each, and the number of the rotors 2000 is one, and the number of the stators 1000a to 1000b is two, and the rotors 2000 are held between the two stators 1000a to 1000b with an air gap therebetween, so that the axial field motor forms a single-rotor double-stator motor.

The heat of the rotor 2000 is transferred to the cooling disc 1310 through an air gap, and the cooling disc 1310 achieves heat transfer cooling.

As shown in fig. 21 and 24, the casing 3000 includes two housings 3001, the housings 3001 include a bottom plate 3100 and an outer plate 3200 formed by extending along an outer edge of the bottom plate 3100, each housing 3001 is correspondingly fixed with one of the stators 1000a to 1000b, the stators 1000a to 1000b are located in an area surrounded by the outer plate 3200, and are fixed on the bottom plate 3100 through a yoke 1110 of the stator core 1100, and the two housings 3001 are relatively abutted and fixed with the outer plate 3200 in a manner that the bottom plate 3100 is external. The yoke 1110 may be fastened to the bottom plate 3100 by bolts, so that the cooling discs 1310 are disposed outside the housing 3001 opposite to the core winding units, so that when two housings 3001 are fastened in an abutting manner by the outer plates 3200, one cooling disc 1310 is disposed between the rotor 2000 and each core winding unit, so that two sides of the rotor 2000 can contact different cooling discs 1310, thereby improving heat dissipation performance. The two housings 3001 may be fixed by bolts or the like, which is not limited herein.

The outer ring runner 13141 extends outwards to form adjacent inlet and outlet sections 1316, the inlet and outlet sections 1316 are separated by a partition 13163 to form adjacent inlet portions 13161 and outlet portions 13162, and bayonets 3201 through which the inlet and outlet sections 1316 pass are formed in the outer side plate 3200. The bayonet 3201 not only can lead out the inlet and outlet segment 1316, but also can pre-fix the cooling disc 1310 so as to ensure the reliability and stability after assembly.

The casing 3000 further comprises an inner plate 3300 and supporting blocks 3400, the inner plate 3300 is sleeved inside the stators 1000 c-1000 e, the supporting blocks 3400 are arranged on the inner wall of the outer plate 3200, and the cooling discs 1310 are fixedly supported on the inner plate 3200 and/or the supporting blocks 3400. Referring to fig. 23, the core winding unit is located between the inner plate 3300 and the outer plate 3200, and the cooling plate 1310 may be abutted on the inner plate 3200 and/or the support block 3400 and locked by bolts. Referring to fig. 2, the cooling disc 1310 is provided with mounting holes 1318 through which bolts pass, the mounting holes 1318 are specifically located at positions corresponding to the outer ring runner 13141 and the inner ring runner 13142, that is, the outer ring runner 13141 abuts against a plurality of circumferentially spaced supporting blocks 3400, and the inner ring runner 13142 abuts against the inner plate 3200.

As shown in fig. 24, a plurality of the support blocks 3400 are disposed on the inner wall of the outer plate 3200 at intervals, and of course, a plurality of the support blocks 3400 may be sequentially connected to form a continuous ring structure, so as to ensure the stability of the fixing of the cooling disc 1310.

Fig. 25 to 27 show schematic structural views of a second embodiment axial field motor employing stators 1000c to 1000d of the third and fourth embodiments, wherein the number of the cooling discs 1310 and the core winding units of the stators 1000c to 1000d is two each, and the number of the stators 1000c to 1000d is one, and the number of the rotors 2000 is two, two core winding units are respectively disposed between the two rotors 2000 with the rotor facing surfaces 1311 facing the rotors 2000, and the tooth blocks 1120 of the two core winding units are in one-to-one correspondence and integrally connected by the yoke 1110 to form a single stator motor of a double rotor.

Each rotor 2000 corresponds to one cooling disc 1310, and heat of the rotor 2000 is transferred to the corresponding cooling disc 1310 through an air gap, and heat transfer cooling is achieved by the cooling disc 1310.

The casing 3000 includes an outer plate 3200 and two bottom plates 3100, bayonets 3201 are respectively provided at two ends of the outer plate 3200, an outer ring runner 13141 of the cooling plate 1310 extends outwards to form an inlet and outlet section 1316, and the two cooling plates 1310 are respectively clamped on the bayonets 3201 at two ends of the outer plate 3200 through the inlet and outlet section 1316, so that two integrally connected iron core winding units are fixed between the two cooling plates 1310, and two ends of the outer plate 3200 are closed through the bottom plates 3100.

As shown in fig. 25 and 26, the casing 3000 further includes an inner plate 3300 and the supporting blocks 3400, the inner plate 3300 is sleeved inside the stators 1000c to 1000e, the supporting blocks 3400 are disposed on the inner wall of the outer plate 3200, and the cooling plates 1310 are supported and fixed on the inner plate 3200 and/or the supporting blocks 3400. The support block 3400 has a continuous ring structure, so that two cooling plates 1310 respectively abut against both sides of the support block 3400 and the inner plate 3200.

As shown in fig. 27, the axial magnetic field motor further includes a rotating shaft, and the rotating shaft penetrates through the centers of the stators 1000c to 1000e and the inner plate 3300 and is rotatably disposed inside the casing 3000, for example, two ends of the rotating shaft are respectively rotatably connected with the bottom plate 3100. The rotor 2000 is fixed to the rotating shaft.

Fig. 27 shows a schematic structural view of an axial field motor of a third embodiment, which employs a stator 1000e of a fifth embodiment, wherein the number of the cooling discs 1310 and the core winding units of the stator 1000e is two, and the number of the stators 1000e is one, and the number of the rotors 2000 is two, and the two core winding units are respectively disposed between the two rotors 2000 in such a manner that the rotor opposite faces 1311 face the rotors 2000, and the tooth blocks 1120 of the two core winding units are in one-to-one correspondence and integrally connected by the yoke disc 1110 to form a whole, so that the axial field motor forms a double-rotor single-stator motor.

Fig. 28 shows a schematic structural view of an axial field motor of a fourth embodiment, which is different from the second embodiment in that a stator 1000f of the sixth embodiment is employed, that is, the stator core 1100 has no yoke 1110, and two tooth blocks 1120 of the core winding units are connected one to one and integrally, and the two core winding units are disposed between the two rotors 2000 in such a manner that the rotor facing surfaces 1311 face the rotors 2000, respectively, so that the axial field motor forms a dual-rotor single-stator motor.

In addition, a plurality of spaced-apart locking bars 3210 are provided on the inner wall of the outer panel, so that the tooth blocks 1120, which are in one-to-one correspondence and integrally connected, are locked between two adjacent locking bars 3210, refer to fig. 28 and 30. Specifically, the tooth block 1120 passes between two adjacent clamping bars 3210, and the surface of the tooth block 1120 is smooth, so that after the two cooling discs 1310 are sleeved on the tooth block 1120 and clamped at two ends of the outer side plate, the two coil assemblies 1200 sleeved on the tooth block 1120 can be respectively arranged at two sides of the clamping bars 3210, and the coil assemblies 1200 at each side can be positioned between the cooling discs 1310 and the clamping bars 3210, thus not only omitting a positioning structure, making the structure more compact, reducing the cost, but also improving the reliability and stability of the structure.

Fig. 29 shows a schematic structural view of an axial field motor of the fifth embodiment, which is different from the fourth embodiment in that a stator 1000g of the seventh embodiment is employed. I.e., two cooling discs 1310 are connected by a connection pipe 1320, see fig. 4 and 5. The utility model also provides an assembling method of the axial magnetic field motor, which comprises the following steps:

S100, providing a cooling disc 1310, said cooling disc 1310 comprising a rotor opposing face 1311, a stator opposing face 1312, and a number of stator pockets 1313 extending through said rotor opposing face 1311 and said stator opposing face 1312;

s200, the stator opposite surface 1312 of the cooling disc 1310 faces towards the iron core winding unit and is sleeved on the iron core winding unit by the stator sleeve holes 1313 so as to form stators 1000 a-1000 f;

s300, the rotor 2000 is opposed to the rotor-facing surface 1311 of the cooling disc 1310, and is integrally enclosed in the casing 3000.

The core winding unit includes a stator core 1100 and a coil assembly 1200, and the stator core 1100 includes a yoke plate 1110 and a plurality of tooth blocks 1120, so that in the step S200, the coil assembly 1200 is sleeved on the tooth blocks 1120, and the tooth blocks 1120 are inserted into the stator sleeve holes 1313 of the cooling plate 1310 to fix the coil assembly 1200 between the stator core 1100 and the cooling plate 1310.

Alternatively, the stator core 1100 includes a plurality of circumferentially spaced tooth blocks, and in the step S200, the coil assembly 1200 is sleeved on the tooth block 1120, and the tooth block 1120 is inserted into the stator sleeve hole 1313 of the cooling disc 1310, so as to fix the coil assembly 1200 between the stator core 1100 and the cooling disc 1310.

Referring to fig. 9 to 11, the coil assembly 1200 is positioned between the yoke disc 1110 and the cooling disc 1310 such that a stator facing surface 1312 of the cooling disc 1310 abuts the coil assembly 1200.

Referring to fig. 12 to 14, both sides of the tooth block 1120 in the circumferential direction are respectively recessed inwards to form recesses 1121, and the step S200 includes: the coil block 1200 is fitted in the recess 1121, and the cooling disc 1310 is engaged between two adjacent coil blocks 1200 so that the stator facing surface 1312 of the cooling disc 1310 abuts against the yoke 1110.

Referring to fig. 15 to 17, the number of the core winding units is two with respect to the number of the cooling plates 1310, and the two core winding units are opposite to each other and integrally connected to form a whole through the yoke plate 1110, and the two tooth blocks 1120 of the core winding units are in one-to-one correspondence, the step S200 includes: two cooling plates 1310 are sleeved on two sides of the two integrally connected iron core winding units.

Referring to fig. 18, a connection pipe 1320 is further provided between the two cooling plates 1310, and the connection pipe 1320 is inserted into the core winding unit so that the core winding unit is internally disposed between the two cooling plates 1310.

As shown in fig. 21 to 24, the casing 3000 includes two housings 3001, and the step S300 includes installing one of the stators 1000a to 1000b in each of the housings 3001 and then connecting the two housings 3001 to each other so that the rotor 2000 is held between the two stators 1000a to 1000b with an air gap therebetween.

As shown in fig. 25 to 27, the casing 3000 includes an outer plate 3200 and two bottom plates 3100, and the step S300 includes respectively engaging two cooling plates 1310 of the stators 1000c to 1000e with both ends of the outer plate 3200, so that two integrally connected core winding units are fixed between the two cooling plates 1310, and the two bottom plates 3100 are encapsulated at both ends of the outer plate 3200.

As shown in fig. 28 and 29, when the two tooth blocks 1120 of the iron core winding are integrally connected in a one-to-one correspondence, a plurality of clamping bars 3210 are arranged on the inner wall of the outer side plate at intervals, the method further includes clamping the tooth blocks 1120 in two adjacent clamping bars 3210, sleeving coil assemblies 1200 at two ends of the tooth blocks 1120, sleeving two cooling discs 1310 at two ends of the tooth blocks 1120, and clamping the two ends of the outer side plate, so that the coil assemblies 1200 at each side can be positioned between the cooling discs 1310 and the clamping bars 3210.

The above-described embodiments are only for illustrating the technical spirit and features of the present utility model, and it is intended to enable those skilled in the art to understand the content of the present utility model and to implement it accordingly, and the scope of the present utility model as defined by the present embodiments should not be limited only by the present embodiments, i.e. equivalent changes or modifications made in accordance with the spirit of the present utility model will still fall within the scope of the present utility model.

Claims (10)

1. The utility model provides a stator (1000 a-1000 d), its characterized in that includes cooling disk (1310) and iron core winding unit, a plurality of stator trepanning (1313) have been seted up on cooling disk (1310), and cooling disk (1310) inside runner (1314) of formation, runner (1314) are around each around stator trepanning (1313), iron core winding unit includes stator core (1100) and coil assembly (1200), stator core (1100) include a plurality of circumference interval arrangement tooth piece (1120), every tooth piece (1120) are all overlapped one outside coil assembly (1200), cooling disk (1310) are with stator trepanning (1313) with tooth piece (1120) one-to-one mode cover is located on stator core (1100), so that coil assembly (1200) limit is located between cooling disk (1310) and stator core (1100).

2. The stator (1000 a-1000 d) of claim 1, wherein the stator core (1100) further comprises a yoke (1110), the tooth block (1120) being fixed to the yoke (1110), the coil assembly (1200) abutting between the yoke (1110) and the cooling plate (1310).

3. The stator (1000 a-1000 d) of claim 2, wherein two circumferential sides of the tooth block (1120) are respectively recessed inward to form a recess (1121), the coil assembly (1200) is embedded in the recess (1121), and the cooling disc (1310) is clamped between two adjacent coil assemblies (1200) so that the cooling disc (1310) abuts against the yoke disc (1110).

4. The stator (1000 a-1000 d) of claim 1, wherein the runner (1314) comprises an outer ring runner (13141), an inner ring runner (13142), and a plurality of branch runners (13143) connected between the outer ring runner (13141) and the inner ring runner (13142), the stator casing hole (1313) being formed between two adjacent branch runners (13143).

5. The stator (1000 a-1000 d) of claim 4, wherein a plurality of barriers (1315) are provided in each of the outer ring runner (13141) and the inner ring runner (13142), and the barriers (1315) located in the outer ring runner (13141) and the inner ring runner (1314) are arranged in a staggered manner.

6. The stator (1000 a-1000 d) according to claim 4, wherein both sides of the coil (1201) in the circumferential direction are wrapped with insulating paper (1202), respectively.

7. A stator (1000 a-1000 d) according to claim 2 or 3, characterized in that the number of core winding units is two, the two tooth blocks (1120) of the core winding units are in one-to-one correspondence and integrally connected by the yoke disc (1110) to form a whole.

8. An axial field motor comprising a stator (1000 a-1000 b) according to any of claims 1-6, further comprising a rotor (2000) and a casing (3000), said casing (3000) comprising two housings (3001), one stator (1000 a-1000 b) being mounted in each housing (3001), said two housings (3001) being connected in opposition such that said rotor (2000) is held in air gap between said two stators (1000 a-1000 b).

9. The axial field motor of claim 8, wherein the outer annular runner (13141) of the runner (1314) extends outwardly to form adjacent inlet and outlet segments (1316), the inlet and outlet segments (1316) being separated by a partition (13163) to form adjacent inlet (13161) and outlet (13162) segments.

10. An axial field motor, comprising the stator (1000 c-1000 d) according to claim 7, further comprising a rotor and a casing (3000), wherein the casing (3000) comprises an outer plate (3200) and two bottom plates (3100), and the two cooling plates (1310) of the stator (1000 e) are respectively clamped at two ends of the outer plate (3200), so that two integrally connected core winding units are fixed between the two cooling plates (1310), two ends of the outer plate (3200) are closed by the bottom plates (3100), and the rotor (2000) is located between the cooling plates (1310) and the bottom plates (3100).

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