CN218387139U

CN218387139U - Motor and heat dissipation device thereof

Info

Publication number: CN218387139U
Application number: CN202222283424.6U
Authority: CN
Inventors: 田瑜; 席金平
Original assignee: Autoflight Kunshan Co Ltd
Current assignee: Autoflight Kunshan Co Ltd
Priority date: 2022-08-30
Filing date: 2022-08-30
Publication date: 2023-01-24
Anticipated expiration: 2032-08-30

Abstract

The application relates to the technical field of motors, in particular to a motor and a heat dissipation device thereof. The utility model provides a heat abstractor is applied to motor, the motor includes the stator portion, a pair of sub-portion that moves sets up and rotates with the stator portion relatively and is connected, stator portion and each rotor portion magnetic interaction each other, in order to provide the relative stator portion pivoted drive power of each rotor portion, heat abstractor includes a pair of heat guide portion, a pair of heat guide portion respectively the one-to-one set up in a pair of sub-portion that moves keeps away from the tip of stator portion, each heat guide portion is derived the heat of stator portion when following the rotation of corresponding rotor portion. The application discloses heat abstractor has strengthened the inside circulation of gas speed of bi-motor, has strengthened the heat-sinking capability.

Description

Motor and heat dissipation device thereof

Technical Field

The application relates to the technical field of motors, in particular to a motor and a heat dissipation device thereof

Background

The electric aircraft takes electric energy as all or part of energy sources of a propulsion system, and is an important mark of the third aviation age. The method opens a new innovation and transformation trend in the aviation field, promotes the development of green aviation, and has revolutionary influence on the world aviation industry. In electric aircraft, the electric motor is a critical part of the power system, determining the reliability of the aircraft. The motor can generate heat in the running process, the main heat sources are iron loss generated by an iron core and copper loss generated by a winding, and the most influence is the copper loss generated by the winding. Generally, the performance of the motor depends on the heat dissipation capability of the motor, the heat dissipation problem not only limits the output power of the motor, but also can damage the motor in serious cases to cause safety accidents.

SUMMERY OF THE UTILITY MODEL

An object of this application is to provide a motor and heat abstractor thereof, the inside circulation of gas speed of bi-motor is strengthened to the heat abstractor of this application, strengthens the heat-sinking capability.

To achieve the above object, a first aspect of the present application provides a heat dissipation device applied to a motor, the motor including:

a stator portion;

at least one pair of movable parts, the at least one pair of movable parts are arranged opposite to the stator part and are connected with the stator part in a rotating mode, and the stator part and each movable part are mutually magnetically acted to provide driving force for each movable part to rotate relative to the stator part;

the heat dissipating device includes:

the heat guiding parts are arranged at the end parts, far away from the stator part, of the pair of rotor parts in a one-to-one correspondence mode, and each heat guiding part conducts heat of the stator part out when rotating along with the corresponding rotor part.

A second aspect of the present application provides an electric machine comprising: a stator portion;

the stator part and each rotor part mutually magnetically act to provide driving force for each rotor part to rotate relative to the stator part;

the at least one pair of movable subparts are provided with at least one pair of heat guiding parts in one-to-one correspondence, each heat guiding part is arranged at the end part corresponding to the movable subpart far away from the stator part, and each heat guiding part guides heat of the stator part out when rotating along with the corresponding movable subpart.

In some embodiments, the at least one pair of heat inducing portions include at least one air flow inducing portion that induces an external air flow into the stator portion while following rotation of the corresponding rotor portion, and at least one air flow inducing portion that induces an internal air flow of the stator portion while following rotation of the corresponding rotor portion.

In some embodiments, the rotor portions are spaced apart, and a central air flow passage is disposed between each of the rotor portions and in communication with the stator portion.

In some embodiments, the stator further comprises a heat dissipation fin, a heat dissipation area extending longitudinally is arranged inside the stator portion, the heat dissipation fin is arranged in the heat dissipation area longitudinally, each heat guiding portion is arranged opposite to the heat dissipation area, and when the heat guiding portions rotate along with the corresponding movable portions, heat of the stator portion is conducted out through the heat dissipation fin.

In some embodiments, the heat dissipation area comprises a heat dissipation area inner wall and a heat dissipation area outer wall which are circumferentially arranged, the heat dissipation fin comprises a long heat dissipation fin and a short heat dissipation fin, the long heat dissipation fin is connected with the heat dissipation area outer wall, the short heat dissipation fin is connected with the heat dissipation area inner wall, and the long heat dissipation fin 301 and the short heat dissipation fin 302 are alternately arranged at intervals.

In some embodiments, the pair of heat inducing portions include an air flow inducing portion that induces an external air flow into the stator portion while following rotation of the corresponding rotor portion, and an air flow inducing portion that induces an internal air flow of the stator portion while following rotation of the corresponding rotor portion.

In some embodiments, a longitudinally extending heat dissipation area is disposed inside the stator portion, a longitudinally extending heat dissipation fin is disposed inside the heat dissipation area, each of the heat guiding portions is disposed opposite to the heat dissipation area, and the heat of the stator portion is conducted out through the heat dissipation fin when each of the heat guiding portions rotates along with the corresponding rotor portion.

In some embodiments, the stator portion includes a pair of stator magnetic units and a bearing housing, each of the stator magnetic units being circumferentially disposed on the bearing housing;

the bearing sleeve comprises a bearing sleeve outer wall and a bearing sleeve inner wall which are arranged in the circumferential direction; a heat dissipation area is arranged between the outer wall of the bearing sleeve and the inner wall of the bearing sleeve, and a plurality of cooling fins are arranged in the heat dissipation area.

In some embodiments, the heat dissipation fins include long heat dissipation fins and short heat dissipation fins, the long heat dissipation fins are connected with the outer wall of the bearing sleeve, the short heat dissipation fins are connected with the inner wall of the bearing sleeve, and the long heat dissipation fins and the short heat dissipation fins are arranged at intervals in a staggered mode.

In some embodiments, each of the rotor portions includes a rotor magnetic unit, each of the rotor magnetic units being disposed opposite to a corresponding one of the stator magnetic units;

the rotor magnetic units and the corresponding stator magnetic units mutually magnetically interact to provide driving force for the rotor part to rotate relative to the stator part.

In some embodiments, a plurality of partition plates are circumferentially arranged between the outer wall of the bearing sleeve and the inner wall of the bearing sleeve, and any two adjacent partition plates and part of the outer wall of the bearing sleeve and part of the inner wall of the bearing sleeve surround to form a plurality of circumferentially surrounding heat dissipation areas.

In some embodiments, the bearing sleeve comprises a bearing sleeve upper part, a bearing sleeve middle part and a bearing sleeve lower part, the bearing sleeve upper part and the bearing sleeve lower part are symmetrically connected to two sides of the bearing sleeve middle part, and the pair of stator magnetic units are symmetrically arranged on the bearing sleeve upper part and the bearing sleeve lower part respectively.

In some embodiments, the bearing sleeve includes a plurality of brackets disposed at circumferentially spaced intervals in a central portion of the bearing sleeve.

In some embodiments, the mover portion includes a rotation center shaft, and the mover magnetic unit is rotationally coupled to the stator portion through the rotation center shaft.

In some embodiments, each of the heat inducing portions is coupled to a corresponding one of the mover magnetic units, and each of the heat inducing portions rotates around the rotation center axis.

In some embodiments, the rotor magnetic unit includes a plurality of magnets, a magnetic steel cylinder and a pair of support ring portions, the pair of support ring portions are respectively connected to two ends of the magnetic steel cylinder, and the plurality of magnets are circumferentially spaced on the inner wall of the magnetic steel cylinder through the support ring portions.

In some embodiments, the magnetic steel cylinder is made of pure iron.

In some embodiments, the heat directing portion is a fan having an airfoil design.

The beneficial effect of this application:

the heat dissipation device strengthens the gas circulation speed inside the double motors, enhances the heat dissipation capacity and improves the output power of the motors.

Drawings

Fig. 1 is a schematic structural diagram of a motor provided in an embodiment of the present application;

FIG. 2 is an exploded view of the motor provided in FIG. 1;

fig. 3 is a schematic structural diagram of a stator portion of an electric machine according to an embodiment of the present application;

FIG. 4 is an exploded view of a stator portion of the motor provided in FIG. 3;

fig. 5 is a schematic structural diagram of a core according to an embodiment of the present application;

FIG. 6 is a schematic diagram of a bearing housing and a bracket of an electric machine according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a rotor portion of a motor according to an embodiment of the present application;

fig. 8 is an exploded view of the rotor portion provided in fig. 7;

FIG. 9 is a cross-sectional view of an electric machine provided by an embodiment of the present application;

FIG. 10 is a top view of a bearing housing and bracket of an electric machine provided in accordance with an embodiment of the present application;

fig. 11 is a top view of a bearing housing and a core of an electric machine according to an embodiment of the present application.

Detailed Description

The technical solution of the present application is further described below with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some but not all of the elements relevant to the present application are shown in the drawings.

In the description of the present application, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

Example one

The present embodiment provides a heat dissipation device, which is applied to a motor, and more particularly, to a dual motor structure, as shown in fig. 1 and 2, the dual motor includes a stator portion 100 and a pair of rotor portions 200, each rotor portion 200 is disposed opposite to the stator portion 100, each rotor portion 200 is rotatably connected to the stator portion 100, and each rotor portion 200 and the stator portion 100 magnetically interact with each other to provide a driving force for rotating each rotor portion 200 relative to the stator portion 100. Each of the rotor portions 200 is provided with a heat guiding portion 230, and each of the heat guiding portions 230 is disposed at an end portion of the corresponding rotor portion 200 away from the stator portion 100, that is, each of the heat guiding portions 230 is disposed at both ends of the double motor in the axial direction. Each heat guiding portion 230 guides heat of the stator portion 100 when rotating following the corresponding mover portion.

Specifically, as shown in fig. 3 and 4, the stator portion 100 includes a pair of stator magnetic units 110 and a bearing housing 120, and each stator magnetic unit 110 is circumferentially disposed on the bearing housing 120. The stator magnetic unit 110 includes a core 111 and a coil 112 disposed on the core 111. As shown in fig. 5, the iron core 111 is circumferentially provided with a plurality of notches 1110, and the coils 112 are placed in the notches 1110. The stator magnetic field is generated after the coil 112 is electrified with the driving current. As shown in fig. 6, the bearing housing 120 includes a bearing housing upper portion 123, a bearing housing middle portion 124, and a bearing housing lower portion 125, the bearing housing upper portion 123, the bearing housing middle portion 124, and the bearing housing lower portion 125 are sequentially connected, wherein the bearing housing upper portion 123 and the bearing housing lower portion 125 are symmetrically connected to both sides of the bearing housing middle portion 124, and the pair of stator magnetic units 110 are symmetrically disposed on the bearing housing upper portion 123 and the bearing housing lower portion 125, respectively.

As shown in fig. 7 and 8, the mover portion 200 includes a mover magnetic unit 210 and a rotation center shaft 220. The mover magnetic unit 210 includes a plurality of magnets 211, a magnetic steel cylinder 212, and a pair of support ring portions 213. The magnet 211 is a magnetic steel sheet, and the magnetic steel cylinder 212 is made of pure iron, has a drum shape, and has two open ends. The pair of support ring portions 213 are connected to both ends of the magnet steel cylinder 212. A plurality of magnets 211 are circumferentially arranged on the inner wall of the magnetic steel cylinder 212 at intervals. The support ring part 213 is provided with protrusions at intervals in the circumferential direction, and the protrusions are used for spacing the magnets 211 and clamping and fixing the magnets 211. In addition, the magnet 211 may be fixed to the inner wall of the magnetic steel cylinder 212 by means of adhesion.

As shown in fig. 9, the mover magnetic unit 210 is disposed opposite to the corresponding stator magnetic unit 110, the mover magnetic unit 210 is connected to the rotation center shaft 220, and the rotation center shaft 220 is rotatably connected to the bearing housing 120 and the stator magnetic unit 110 fixedly connected to the bearing housing 120 through the bearing 500. The mover magnetic field generated by the mover magnetic unit 210 and the stator magnetic field generated by the stator magnetic unit 110 magnetically interact with each other, and provide a driving force for rotating the mover portion 200 relative to the stator portion 100. And independent driving current can be input into the coils 112 of each pair of stator magnetic units 110 through the control unit, so that each pair of stator magnetic units 110 and each pair of mover magnetic units 210 can be independently controlled, and an independent control system of coaxial double motors is realized. For example, in the present embodiment, the output power level is designed to be 1000NM at maximum torque, 2500 rpm at maximum speed, and 2300 rpm at continuous speed. The component parameters for the single and dual motor designs respectively to achieve the above design requirements are shown in the following table:

according to the embodiment of the application, the double-motor structure realizes that the motor is small in size and light in weight under the same output power, and the maximum torque can be quickly output when the fixed wing flight and the rotor wing flight are switched, so that the rotor wing flight is switched to the fixed wing flight in the shortest time, and the quick take-off and landing are realized while the energy consumption is reduced; meanwhile, the high-frequency vibration time of the aircraft during switching of the flight modes is reduced, the safety of the aircraft is improved, and compared with a single-motor structure, the double-motor structure can effectively reduce eddy current loss and iron core loss under the same power condition, so that the motor efficiency is improved, and the aircraft has higher safety and reliability while the mileage of the aircraft is improved.

It should be noted that, in the embodiment of the present application, only one pair of the stator magnetic unit 110 and the mover magnetic unit 210 is used as an example for description, and actually, the stator magnetic unit and the mover magnetic unit are not limited to one pair in the drawings, and may be two pairs or more than two pairs.

When the rotor portion 200 rotates relative to the stator portion 100, the system generates heat, for example, when the coil 112 of the stator magnetic unit 110 inputs driving current, the system generates heat, and when the bearing 500 rotates, the system also inevitably generates heat, and at this time, the heat sink disposed on the rotor portion 200 can dissipate the generated heat. As shown in fig. 9, the heat dissipating device includes a pair of heat guiding parts 230, which are an airflow introduction part 230a and an airflow discharge part 230b, respectively. The air flow introduction part 230a and the air flow discharge part 230b are coaxially coupled to the rotation center shaft 220, respectively, and the heat guide parts 230 are disposed at ends of the corresponding mover part 200 distant from the stator part 100, that is, the air flow introduction part 230a and the air flow discharge part 230b are disposed at both axial ends of the two-motor structure, respectively. The air flow introduction part 230a introduces an external air flow, which is an external cold air flow and exchanges heat when the cold air flow passes through the stator part 100, into the stator part 100 while rotating along with the corresponding rotor part 200. The air flow guiding portion 230b guides the internal air flow of the stator portion 100 when rotating along with the corresponding rotor portion 200, and the guided internal air flow is a hot air flow after heat exchange, thereby completing heat dissipation of the motor.

Further, the heat dissipation device of the present embodiment further includes a heat dissipation plate, as shown in fig. 10, the bearing sleeve 120 of the stator portion 100 includes a bearing sleeve outer wall 121 and a bearing sleeve inner wall 122, which are circumferentially disposed, and a heat dissipation area 400 longitudinally extending is disposed between the bearing sleeve outer wall 121 and the bearing sleeve inner wall 122, in this case, the bearing sleeve outer wall 121 serves as a heat dissipation area outer wall, and the bearing sleeve inner wall 122 serves as a heat dissipation area inner wall. A plurality of partition plates 126 are circumferentially arranged between the bearing housing outer wall 121 and the bearing housing inner wall 122, and a plurality of heat dissipation areas 400, which are exemplarily 6 in this embodiment, are formed by surrounding a part of the bearing housing outer wall 121, a part of the bearing housing inner wall 122, and two adjacent partition plates 126. Be provided with a plurality of fin 300 in heat dissipation area 400, fin 300 includes long heat dissipation piece 301 and short heat dissipation piece 302, long heat dissipation piece 301 is connected with bearing housing outer wall 121, short heat dissipation piece 302 is connected with bearing housing inner wall 122, long heat dissipation piece 301 and the crisscross interval setting of short heat dissipation piece 302, long heat dissipation piece 301 and short heat dissipation piece 302 are at the inside interconnect not of heat dissipation area 400 promptly, make the inside cavity of heat dissipation area 400 communicate each other, make the air current circulation efficiency improve on the one hand, more be favorable to the heat dissipation, the cavity of on the other hand intercommunication can be realized adding man-hour tool bit continuous cutting, machining efficiency is higher. The inner side of the bearing housing inner wall 122 forms a hollow structure in which the bearing housing 500 is installed, and the bearing housing 500 is used to connect with the rotation center shaft 220. Each heat guiding portion 230 is disposed opposite to the heat dissipating portion 400, heat of the stator portion 100 is transferred to the heat dissipating fins 300, and when each heat guiding portion 230 rotates along with the corresponding rotor portion 200, the air flow passes through the surface of each heat dissipating fin 300 to perform heat exchange, thereby improving heat exchange efficiency. By opening the inside of the bearing housing 120, the speed of the gas between the gas flow introduction part 230a and the gas flow discharge part 230b can be increased, and the heat radiation efficiency of the motor can be greatly improved by radiating the heat through the heat radiation fins 300 in the bearing housing 120.

In the embodiment, the heat guiding portion 230 is exemplified by a fan, and the airflow enters or exits the motor through the gap between the fan blades, thereby carrying away the heat generated during the operation of the motor. The airflow introducing part 230a is an inlet axial flow wing fan, and the airflow discharging part 230b is an outlet axial flow wing fan. The number of blades of the air inlet axial flow wing type fan is preferably designed to be 15, the diameter range of the blades of the air inlet fan is preferably 255-265 mm, the torsion angle of the blades of the air inlet fan is 50-60 degrees, and the width of the blades is preferably 40mm. Air exhaust axial flow wing fan: the diameter of the fan blades is 255-265 mm, the number of the fan blades is 15, the torsion angle is 70-80 degrees, and the width of the fan blades is preferably 45mm. In addition, fan blade can also the wing section design, combines torsion angle and flabellum size design, can produce the effect that the pressurization is accelerated to the air inlet duct, can promote the aerodynamic profile, behind the flabellum that has the wing section design, the wing section design of this moment analogizes in the wing section design of unmanned aerial vehicle wing, and wind speed and wind pressure all can obtain promoting to promote the radiating efficiency.

It should be noted that the heat guiding portion 230 may actually have other configurations, and the air flow direction may be in the axial direction as shown in fig. 1, in the radial direction, and in both the axial direction and the radial direction. In addition, the heat guide 230 and the support ring 213 in fig. 8 may be integrally connected or may be joined.

In addition, in this embodiment, the heat guiding portions 230 are connected to the corresponding mover magnetic units 210, and in order to make the connection between the magnetic steel cylinder 212 and the heat guiding portions 230 more stable and reliable, threaded holes are uniformly distributed along the circumference at one end of the outer surface of the magnetic steel cylinder 212 close to the heat guiding portions 230. Specifically, the glue pressure can be firstly applied to the outer surface of the heat guiding portion 230, then the glue pressure applied heat guiding portion 230 is fastened to the magnetic steel cylinder 212, and then the screw is screwed to lock the heat guiding portion 230 and the magnetic steel cylinder 212 together through the threaded hole, so that the heat guiding portion 230 and the magnetic steel cylinder 212 are in threaded connection, and the extra glue pressure effect is achieved, so that the heat guiding portion 230 and the magnetic steel cylinder 212 are protected in a dual-connection mode, and the overall reliable connection is improved.

Further, as shown in fig. 1, the respective rotor portions 200 are arranged at intervals, a middle air flow passage 401 is provided between the respective rotor portions 200, and the middle air flow passage 401 communicates with the stator portion 100. When the motor is running, the middle airflow channel 401 can be used as an additional air inlet and an air outlet. The airflow enters from the upper airflow inlet 230a and is discharged from the lower airflow outlet 230b, and a part of hot airflow formed by the upper motor can be discharged out of the upper motor in advance by the middle airflow channel 401 and is provided to the lower motor for fresh cold airflow to be used as part of inlet air of the lower motor, thereby promoting the heat exchange efficiency of the motor. In addition, if one of them motor is out of work, also can shorten air inlet route or air exhaust route, be favorable to improving motor efficiency. In some embodiments, a plurality of brackets 700 are circumferentially spaced about bearing housing mid-section 124, and a fixed connection to an aircraft or other device may be made via brackets 700. The middle airflow passage 401 in this embodiment may be provided between any adjacent brackets 700.

The heat dissipation device of the embodiment of the application has the advantages that the gas circulation speed inside the double motors is effectively increased, the heat dissipation capacity is enhanced, and the output power of the motors is improved.

Example two

The present embodiment provides a motor, which is embodied as a dual motor structure, as shown in fig. 1 and 2, the motor includes a stator portion 100 and a pair of movable portions 200, each movable portion 200 is disposed opposite to the stator portion 100, and each movable portion 200 is rotatably coupled to the stator portion 100, and the stator portion 100 and each movable portion 200 magnetically interact with each other to provide a driving force for rotating each movable portion 200 relative to the stator portion 100. Each of the rotor portions 200 is provided with a heat guiding portion 230, and each of the heat guiding portions 230 is disposed at an end of the corresponding rotor portion 200 away from the stator portion 100, that is, each of the heat guiding portions 230 is disposed at both ends of the dual motor in a longitudinal direction thereof. Each heat guiding portion 230 guides heat of the stator portion 100 when rotating following the corresponding mover portion.

Specifically, as shown in fig. 3 and 4, the stator portion 100 includes a pair of stator magnetic units 110 and a bearing housing 120, and each stator magnetic unit 110 is circumferentially disposed on the bearing housing 120. The stator magnetic unit 110 includes a core 111 and a coil 112 disposed on the core 111. As shown in fig. 5, the iron core 111 is circumferentially provided with a plurality of notches 1110, and the coil 112 is placed in the notches 1110. The stator magnetic field is generated after the coil 112 is electrified with the driving current. As shown in fig. 6, the bearing housing 120 includes a bearing housing upper portion 123, a bearing housing middle portion 124, and a bearing housing lower portion 125, the bearing housing upper portion 123, the bearing housing middle portion 124, and the bearing housing lower portion 125 are sequentially connected, wherein the bearing housing upper portion 123 and the bearing housing lower portion 125 are symmetrically connected to both sides of the bearing housing middle portion 124, and the pair of stator magnetic units 110 are symmetrically disposed on the bearing housing upper portion 123 and the bearing housing lower portion 125, respectively.

As shown in fig. 7 and 8, the mover portion 200 includes a mover magnetic unit 210 and a rotation center shaft 220. The mover magnetic unit 210 includes a plurality of magnets 211, a magnetic steel cylinder 212, and a pair of support ring portions 213. The magnet 211 is a magnetic steel sheet, and the magnetic steel cylinder 212 is made of pure iron, has a drum shape, and has two open ends. The pair of support ring portions 213 are connected to both ends of the magnet steel cylinder 212. The magnets 211 are circumferentially arranged on the inner wall of the magnetic steel cylinder 212 at intervals. As shown in fig. 8, the support ring 213 has protrusions spaced from the magnet 211 at intervals, and the protrusions clamp and fix the magnet 211. The magnet 211 may be fixed to the inner wall of the magnetic steel cylinder 212 by bonding.

As shown in fig. 9, the mover magnetic unit 210 is disposed opposite to the corresponding stator magnetic unit 110, the mover magnetic unit 210 is connected to the rotation center shaft 220, and the rotation center shaft 220 is rotatably connected to the bearing housing 120 and the stator magnetic unit 110 fixedly connected to the bearing housing 120 through the bearing 500. The mover magnetic field generated by the mover magnetic unit 210 and the stator magnetic field generated by the stator magnetic unit 110 magnetically interact with each other, and provide a driving force for rotating the mover portion 200 relative to the stator portion 100. And independent driving current can be input into the coil 112 of each pair of stator magnetic units 110 through the control unit, so that each pair of stator magnetic units 110 and each pair of mover magnetic units 210 can be independently controlled, and a dual-motor independent control system is realized. According to the embodiment of the application, the double-motor structure realizes that the motor is small in size and light in weight under the same output power, and the maximum torque can be quickly output when the fixed wing flight and the rotor flight are switched, so that the rotor flight is switched to the fixed wing flight in the shortest time, and the quick take-off and landing are realized while the energy consumption is reduced; meanwhile, the high-frequency vibration time of the aircraft during switching of flight modes is reduced, the safety of the aircraft is improved, and compared with a single-motor structure, the double-motor structure can effectively reduce eddy current loss and iron core loss under the same power condition, so that the motor efficiency is improved, and the aircraft has higher safety and reliability while the mileage of the aircraft is improved.

It should be noted that, in the embodiment of the present application, only one pair of the stator magnetic unit 110 and the mover magnetic unit 210 is taken as an example for description, and the stator magnetic unit and the mover magnetic unit are not limited to one pair in the drawings, and may be two pairs or more than two pairs. When the rotor portion 200 rotates relative to the stator portion 100, the system generates heat, for example, when the coil 112 of the stator magnetic unit 110 inputs driving current, the system generates heat, and when the bearing 500 rotates, the heat guiding portion 230 disposed on the rotor portion 200 guides the generated heat. As shown in fig. 9, the pair of heat inducing portions 230 are an airflow introduction portion 230a and an airflow discharge portion 230b, respectively. The air flow introduction part 230a and the air flow discharge part 230b are coaxially coupled to the rotation center shaft 220, respectively, and the heat guide parts 230 are disposed at ends of the corresponding mover part 200 distant from the stator part 100, that is, the air flow introduction part 230a and the air flow discharge part 230b are disposed at both axial ends of the two-motor structure, respectively. The air flow introduction part 230a introduces an external air flow, which is an external cold air flow and exchanges heat when the cold air flow passes through the stator part 100, into the stator part 100 while rotating along with the corresponding rotor part 200. The air flow guiding part 230b guides the internal air flow of the stator part 100 when rotating along with the corresponding rotor part 200, and the guided internal air flow is a hot air flow after heat exchange, thereby completing heat dissipation of the motor.

As shown in fig. 10, the bearing sleeve 120 of the stator portion 100 includes a bearing sleeve outer wall 121 and a bearing sleeve inner wall 122, which are circumferentially disposed, and a heat dissipation region 400 extending longitudinally is disposed between the bearing sleeve outer wall 121 and the bearing sleeve inner wall 122, in which case, the bearing sleeve outer wall 121 serves as the heat dissipation region outer wall and the bearing sleeve inner wall 122 serves as the heat dissipation region inner wall. A plurality of partition plates 126 are circumferentially arranged between the bearing sleeve outer wall 121 and the bearing sleeve inner wall 122, and a plurality of heat dissipation areas 400 are formed by surrounding a part of the bearing sleeve outer wall 121, a part of the bearing sleeve inner wall 122 and two adjacent partition plates 126. Be provided with a plurality of fin 300 in heat dissipation area 400, fin 300 includes long heat dissipation piece 301 and short heat dissipation piece 302, long heat dissipation piece 301 is connected with bearing housing outer wall 121, short heat dissipation piece 302 is connected with bearing housing inner wall 122, long heat dissipation piece 301 and the crisscross interval setting of short heat dissipation piece 302, long heat dissipation piece 301 and short heat dissipation piece 302 are at the inside interconnect not of heat dissipation area 400 promptly, make the inside cavity of heat dissipation area 400 communicate each other, can dispel the heat more effectively on the one hand, the cavity of on the other hand intercommunication can realize adding the continuous cutting of tool bit when adding man-hour, machining efficiency is higher. Each heat guiding portion 230 is disposed opposite to the heat dissipating portion 400, heat of the stator portion 100 is transferred to the heat dissipating fins 300, and when each heat guiding portion 230 rotates along with the corresponding rotor portion 200, the air flow passes through the surface of each heat dissipating fin 300 to perform heat exchange, thereby improving heat exchange efficiency.

In the embodiment, the heat guiding portion 230 is exemplified by a fan, and the airflow enters or exits the motor through the gap between the fan blades, thereby carrying away the heat generated during the operation of the motor. The airflow introducing part 230a is an inlet axial flow wing fan, and the airflow discharging part 230b is an outlet axial flow wing fan. The number of blades of the air inlet axial flow wing type fan is preferably designed to be 15, the diameter range of the blades of the air inlet fan is preferably 255-265 mm, the torsion angle of the blades of the air inlet fan is 50-60 degrees, and the width of the blades is preferably 40mm. Air exhaust axial flow wing fan: the diameter of the fan blades is 255-265 mm, the number of the fan blades is 15, the torsion angle is 70-80 degrees, the width of the fan blades is preferably 45mm, and the width and the torsion angle of the blades of the exhaust axial flow wing type fan are increased, so that the exhaust of gas after internal heat exchange is accelerated. In addition, fan blade can also the wing section design, combines to twist reverse angle and flabellum size design, can produce the effect that the pressurization is accelerated to the air inlet duct, can promote the aerodynamic profile, after the flabellum that has the wing section design, the wing section design of this moment is analogized in the wing section design of unmanned aerial vehicle wing, and wind speed and wind pressure all can obtain promoting to promote the radiating efficiency.

It should be noted that the heat guiding portion 230 may actually have other configurations, and the air flow direction may be in the axial direction as shown in fig. 1, in the radial direction, and in both the axial direction and the radial direction. In addition, the heat guide part 230 and the support ring part 213 in fig. 8 may be integrally connected or may be spliced.

Further, as shown in fig. 1, the respective rotor portions 200 are arranged at intervals, a middle air flow passage 401 is provided between the respective rotor portions 200, and the middle air flow passage 401 communicates with the stator portion 100. When the motor is running, the middle airflow channel 401 can be used as an additional air inlet and an air outlet. The airflow enters from the upper airflow inlet 230a and is discharged from the lower airflow outlet 230b, and a part of hot airflow formed by the upper motor can be discharged out of the upper motor in advance by the middle airflow channel 401 and is provided to the lower motor for fresh cold airflow to be used as part of inlet air of the lower motor, thereby promoting the heat exchange efficiency of the motor. In addition, if one of them motor is out of work, also can shorten the air inlet route or the route of airing exhaust, be favorable to improving motor efficiency.

The motor of this application embodiment has strengthened the inside gaseous circulation speed of bi-motor through heat guide portion, has strengthened the heat-sinking capability, has promoted the output of motor.

EXAMPLE III

The present embodiment is substantially the same as the second embodiment, and the motor provided in the present embodiment refines the iron core 111 and the bearing housing 120, and specifically includes:

the iron core 111 is made of sand steel sheets, the thickness of the sand steel sheets is only 0.2mm, the iron core 111 comprises an iron core inner diameter and an iron core outer diameter, and the value range of the iron core inner diameter can be 198mm-200mm. Correspondingly, the value range of the core outer diameter can be 258mm-260mm, and the values of the core outer diameter and the core inner diameter are determined according to actual production requirements. In the reasonable ratio range of the inner diameter of the iron core and the outer diameter of the iron core, the magnetic field generated by the stator assembly matched with the motor can reach the optimum, and the efficiency of the motor is improved. As shown in fig. 11, the core 111 has a plurality of slots 1110, the slots 1110 are used for accommodating the coils 112, and the exemplary core 111 in this embodiment has 54 slots, and the larger the number of slots is, the better the heat dissipation is. Of course, the number of slots may be greater than 54, and is not particularly limited. The tooth width of the iron core 111 is specifically 11mm-13mm, the tooth height is specifically 22mm-24mm, and the notch width of the iron core 111 is specifically 2.5mm-2.7mm. When the numerical value of the tooth width is less than 12mm, the motor efficiency of the motor is gradually increased along with the increase of the tooth width of the iron core body, and when the tooth width reaches 12.5mm, the motor efficiency of the motor reaches the maximum value. When the tooth width is greater than 12.5mm, the motor efficiency is gradually reduced. The principle is that when the tooth width is small, the magnetic density of the motor iron core can be reduced by increasing the tooth width, so that the iron loss of the motor is reduced, and the motor efficiency is improved. And when the tooth width is larger, the load of the whole motor iron core is larger, and further the motor efficiency is reduced. Therefore, the range of the tooth width of the core 111 is limited to the range value in the present application, and the efficiency of the motor can be improved. In addition, the stator assembly provided by the present application has a slot pole ratio of the iron core 111 of preferably 9/10.

In addition, as shown in fig. 11, a plurality of positioning grooves 127 extending in the longitudinal direction are provided at intervals on the outer wall of the bearing housing 120, and positioning members are installed in the positioning grooves 127. When the motor is assembled, the iron core 111 is sleeved outside the bearing housing 120, the inner wall of the iron core 111 is also provided with a similar positioning groove, the positioning groove 127 of the bearing housing 120 and the positioning groove of the iron core 111 are correspondingly installed, and a positioning element (such as a cylindrical needle 600 shown in fig. 3) is additionally installed in a cavity formed by splicing, so that relative movement between the bearing housing 120 and the iron core 111 is prevented. The outer wall of the bearing housing 120 is provided at intervals with a plurality of circumferentially extending grooves. The recess is used for beating glue as gluing the position, can be further spacing to the iron core of peripheral hardware through the recess.

The motor of this application embodiment has strengthened the inside gaseous circulation speed of bi-motor through heat guide portion, has strengthened the heat-sinking capability, has promoted the output of motor. Through getting through the inside of bearing housing, can accelerate the circulation of gas between air current induction portion and the air current derivation portion, and dispel the heat through the fin in the bearing housing, can improve the radiating efficiency of motor greatly. The iron core of the embodiment of the application has reasonable groove number and tooth width, and heat dissipation is facilitated.

It should be understood that the above examples are merely examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A heat dissipation device is characterized in that the heat dissipation device is applied to a motor, and the motor comprises:

a stator portion (100);

at least one pair of rotor parts (200), wherein the at least one pair of rotor parts (200) is arranged opposite to the stator part (100) and is connected with the stator part (100) in a rotating way, and the stator part (100) and each rotor part (200) mutually magnetically act to provide driving force for rotating each rotor part (200) relative to the stator part (100);

the heat sink includes:

the heat conducting parts (230) are arranged at the end parts, far away from the stator part (100), of the movable parts (200) in a one-to-one correspondence mode, and each heat conducting part (230) conducts heat of the stator part (100) when rotating along with the corresponding movable part (200).

2. The heat dissipating device according to claim 1, wherein the at least one pair of heat inducing portions (230) includes at least one air flow inducing portion (230 a) that induces an external air flow into the stator portion (100) when the at least one air flow inducing portion (230 a) rotates following the corresponding moving portion (200), and at least one air flow inducing portion (230 b) that induces an internal air flow of the stator portion (100) when the at least one air flow inducing portion (230 b) rotates following the corresponding moving portion (200).

3. The heat sink according to claim 1 or 2, wherein the rotor portions (200) are spaced apart, and a central air flow passage (401) communicating with the stator portion (100) is provided between the rotor portions (200).

4. The heat sink as recited in claim 1, further comprising a heat sink (300);

the stator part (100) is internally provided with a longitudinally extending heat dissipation area (400), the heat dissipation fins (300) are longitudinally arranged in the heat dissipation area (400), each heat guiding part (230) is arranged opposite to the heat dissipation area (400), and the heat of the stator part (100) is led out through the heat dissipation fins (300) when each heat guiding part (230) rotates along with the corresponding movable part (200).

5. The heat dissipation device according to claim 4, wherein the heat dissipation area (400) comprises a heat dissipation area inner wall and a heat dissipation area outer wall which are circumferentially arranged, the heat dissipation plate (300) comprises a long heat dissipation plate (301) and a short heat dissipation plate (302), the long heat dissipation plate (301) is connected with the heat dissipation area outer wall, the short heat dissipation plate (302) is connected with the heat dissipation area inner wall, and the long heat dissipation plate (301) and the short heat dissipation plate (302) are alternately arranged.

6. An electric machine, comprising:

a stator portion (100);

the at least one pair of moving parts (200) are provided with at least one pair of heat guiding parts (230) in one-to-one correspondence, each heat guiding part (230) is arranged at the end part, far away from the stator part (100), corresponding to the moving part (200), and each heat guiding part (230) guides heat out of the stator part (100) when rotating along with the corresponding moving part (200).

7. The electric machine according to claim 6, wherein the at least one pair of heat inducing portions (230) includes at least one air flow inducing portion (230 a) that induces an external air flow into the stator portion (100) when the at least one air flow inducing portion (230 a) rotates following the corresponding moving portion (200), and at least one air flow inducing portion (230 b) that induces an internal air flow of the stator portion (100) when the at least one air flow inducing portion (230 b) rotates following the corresponding moving portion (200).

8. The electric machine according to claim 7, wherein the rotor portions (200) are spaced apart, and a central air flow passage (401) is provided between each rotor portion (200) in communication with the stator portion (100).

9. The electric machine according to claim 6, wherein a longitudinally extending heat dissipation area (400) is provided inside the stator portion (100), a longitudinally extending heat dissipation fin (300) is provided inside the heat dissipation area (400), each of the heat guiding portions (230) is disposed opposite to the heat dissipation area (400), and each of the heat guiding portions (230) conducts heat of the stator portion (100) out through the heat dissipation fin (300) when rotating following the corresponding rotor portion (200).

10. The electric machine according to claim 9, wherein the stator portion (100) comprises a pair of stator magnetic units (110) and a bearing housing (120), each stator magnetic unit (110) being circumferentially arranged on the bearing housing (120);

the bearing sleeve (120) comprises a bearing sleeve outer wall (121) and a bearing sleeve inner wall (122) which are circumferentially arranged; a heat dissipation area (400) is arranged between the outer wall (121) of the bearing sleeve and the inner wall (122) of the bearing sleeve, and a plurality of heat dissipation fins (300) are arranged in the heat dissipation area (400).

11. The electric machine according to claim 10, characterized in that the heat sink (300) comprises long heat sink fins (301) and short heat sink fins (302), the long heat sink fins (301) are connected with the outer bearing sleeve wall (121), the short heat sink fins (302) are connected with the inner bearing sleeve wall (122), and the long heat sink fins (301) and the short heat sink fins (302) are alternately arranged.

12. The motor of claim 10, wherein each rotor portion (200) comprises a rotor magnetic unit (210), each rotor magnetic unit (210) being disposed opposite a corresponding stator magnetic unit (110);

the rotor magnetic unit (210) and the corresponding stator magnetic unit (110) are mutually magnetically interacted to provide a driving force for the rotor part (200) to rotate relative to the stator part (100).

13. The electric machine according to claim 10, characterized in that a plurality of partitions (126) are circumferentially arranged between the bearing sleeve outer wall (121) and the bearing sleeve inner wall (122), and any two adjacent partitions (126) surround a part of the bearing sleeve outer wall (121) and a part of the bearing sleeve inner wall (122) to form a plurality of circumferentially surrounding heat dissipation areas (400).

14. The motor according to claim 10, wherein the bearing housing (120) comprises a bearing housing upper part (123), a bearing housing middle part (124) and a bearing housing lower part (125), the bearing housing upper part (123) and the bearing housing lower part (125) are symmetrically connected to two sides of the bearing housing middle part (124), and the pair of stator magnetic units (110) are symmetrically arranged on the bearing housing upper part (123) and the bearing housing lower part (125), respectively.

15. The electric machine according to claim 14, characterized in that the bearing housing (120) comprises a number of brackets (700), the number of brackets (700) being circumferentially spaced at the bearing housing middle part (124).

16. The machine according to claim 6, wherein the mover portion (200) comprises a rotation center shaft (220), the mover magnetic unit (210) being rotationally connected with the stator portion (100) through the rotation center shaft (220).

17. The motor of claim 16, wherein each of the heat inducing portions is coupled to the corresponding mover magnet unit (210), and each of the heat inducing portions (230) rotates about the rotation center axis (220).

18. The motor according to claim 6, wherein the mover magnetic unit (210) comprises a plurality of magnets (211), a magnetic steel cylinder (212), and a pair of support ring portions (213), the pair of support ring portions (213) are respectively connected to two ends of the magnetic steel cylinder (212), and the plurality of magnets (211) are circumferentially spaced on an inner wall of the magnetic steel cylinder (212) through the support ring portions (213).

19. The machine according to claim 18, wherein the magnet steel cylinder (212) is made of pure iron.

20. The electrical machine according to claim 12, characterized in that the heat directing part (230) is a fan having an airfoil design.