CN113612329A - Axial flux electric machine - Google Patents
Axial flux electric machine Download PDFInfo
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- CN113612329A CN113612329A CN202110118452.XA CN202110118452A CN113612329A CN 113612329 A CN113612329 A CN 113612329A CN 202110118452 A CN202110118452 A CN 202110118452A CN 113612329 A CN113612329 A CN 113612329A
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- rotor disc
- gap
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- air
- wind
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/12—Transversal flux machines
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses an axial flux motor, comprising: a housing; the stator assembly is arranged in the shell; the rotor disc is arranged in the shell and positioned between the stator assembly and the shell, a first gap and a second gap are respectively formed between the two sides of the rotor disc in the axial direction and the shell and between the two sides of the rotor disc and the stator assembly, a third gap communicated with the first gap and the second gap is formed between the radial periphery of the rotor disc and the shell, and a communication hole communicated with the first gap and the second gap is formed in the rotor disc; the motor shaft penetrates through the stator assembly and is connected with the rotor disc; the air guide piece is arranged on the rotor disc and protrudes out of the surface of the rotor disc so as to drive airflow to circularly flow in a cavity formed by the first gap, the third gap, the second gap and the communication hole. According to the axial flux motor, the rotor disc is provided with the air guide piece, the air guide piece can disturb air flow in the shell, so that the air flow further dissipates heat of the stator assembly, and the heat dissipation performance of the axial flux motor is improved.
Description
Technical Field
The invention relates to the field of motors, in particular to an axial magnetic motor.
Background
In the related art, the axial flux motor generally has a large power density, and the absolute value of the heating loss and the heating density of the stator are generally larger than those of a common built-in permanent magnet synchronous motor. A more efficient heat dissipation design is needed to fully develop its performance. The current axial flux motor uses a water cooling structure of a certain axial length on the outer diameter side of the stator assembly to cool the stator assembly. The final radial profile of the stator assembly is typically manufactured to relatively large assembly and manufacturing tolerances during manufacture. In order to fill up the tolerance of the outer diameter size of the formed stator assembly and reliably dissipate heat, a certain gap is required to be reserved between the stator assembly and the inner diameter surface of the water cooling structure, then heat-conducting glue is used for pouring and casting, and air gaps between the stator assembly and the water cooling structure are sealed and filled, so that the stator is cooled on the single surface of one side of the outer diameter of the stator, the heat-conducting glue is small in heat conductivity coefficient and thick in radial volume, large heat transfer resistance is formed, and heat transfer of the water cooling structure is not facilitated.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide an axial flux motor, in which a rotor disk of the axial flux motor is provided with an air guide, the air guide can disturb air flow in a housing, boost the air flow near the center of a rotating shaft, and form a circulating air flow inside the rotor, so that the air flow further dissipates heat of a stator assembly, and the heat dissipation performance of the axial flux motor is improved.
An axial-flux electric machine according to the present invention includes: a housing; a stator assembly disposed within the housing; the rotor disc is arranged in the shell and positioned between the stator assembly and the shell, a first gap and a second gap are respectively formed between the two sides of the rotor disc in the axial direction and the shell and between the two sides of the rotor disc and the stator assembly, a third gap communicated with the first gap and the second gap is formed between the radial periphery of the rotor disc and the shell, and a communication hole communicated with the first gap and the second gap is formed in the rotor disc; the motor shaft penetrates through the stator assembly and is connected with the rotor disc; the air guide piece is arranged on the rotor disc and protrudes out of the surface of the rotor disc so as to drive airflow to circularly flow in a cavity formed by the first gap, the third gap, the second gap and the communication hole.
According to the axial flux motor, the communicating holes and the air guide pieces are arranged on the rotor disc, so that the flow velocity of air flow in the axial flux motor is increased in the radial direction, heat generated by the rotor and the stator assembly is quickly dissipated to the shell and exchanges heat with the low-temperature surface with water cooling radiation in the shell, the heat exchange efficiency between the rotor assembly and the shell is improved, and the use performance of the axial flux motor is improved.
According to an embodiment of the invention, the wind guide is disposed on at least one side in an axial direction of the rotor disk.
According to an embodiment of the present invention, the air guide includes: the wind guide ribs protrude out of the surface of the rotor disc, the wind guide ribs are arranged at intervals in the circumferential direction of the rotor disc, and each wind guide rib extends towards the direction opposite to the rotation direction of the rotor disc in the direction far away from the rotation center of the rotor disc.
According to an embodiment of the invention, each of the wind-guiding ribs is tangent to an arc at any position, and the radius of the arc tangent to the wind-guiding rib in a direction gradually away from the rotation center of the rotor disk is gradually reduced.
According to one embodiment of the present invention, the radially outer end surface of the air guide rib is provided with a spoiler that protrudes in the radial direction.
According to an embodiment of the invention, the dimension of the wind deflector in the axial direction increases gradually in a direction away from the centre of rotation of the rotor disc.
According to an embodiment of the present invention, the air guide includes: the first air guiding ribs are configured to protrude out of the surface of the rotor disc, and the first air guiding ribs are multiple and are arranged at intervals in the circumferential direction of the rotor disc; the first air guiding ribs are configured to protrude out of the surface of the rotor disc, a plurality of second air guiding ribs are arranged at intervals in the circumferential direction of the rotor disc, and each second air guiding rib is arranged between two adjacent first air guiding ribs; wherein the radial outer end of the first air guiding rib and the radial outer end of the second air guiding rib are arranged in a staggered manner.
According to an embodiment of the present invention, the air guide includes: a plurality of rib groups that are configured to be arranged at intervals in order in a circumferential direction of the rotor disk, each of the rib groups including: the first air guiding ribs and the second air guiding ribs are sequentially arranged at intervals in the circumferential direction of the rotor disc; wherein the radial outer end of the first air guiding rib and the radial outer end of the second air guiding rib are arranged in a staggered manner.
According to an embodiment of the invention, the rotor disk comprises: an inner circular part, the inner circumference of which is connected with the motor shaft; a connecting portion having an inner circumferential edge connected to an outer circumferential edge of the inner circular portion and provided with the communication hole; the inner circumference of the outer circle part is connected with the outer circumference of the connecting part and is opposite to the stator assembly, the outer circle part and the inner circle part are arranged in a staggered mode in the axial direction, and the air guide piece is arranged on the outer circle part; wherein the connecting part is provided with a third air guiding rib extending in the axial direction.
According to an embodiment of the present invention, the communication holes are configured in plural and arranged at intervals in a circumferential direction of the connecting portion, and the third wind guiding rib is provided between adjacent two of the communication holes.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is an exploded view of an axial-flux electric machine according to an embodiment of the present invention;
fig. 2 is a partial cross-sectional view of an axial-flux electric machine according to an embodiment of the present invention;
FIG. 3 is a schematic view of the mating of a rotor disk, a motor shaft, and a stator assembly according to an embodiment of the invention;
FIG. 4 is a schematic structural view of a rotor disk according to an embodiment of the invention;
FIG. 5 is a schematic view of the mating of a rotor disk, a motor shaft, and a stator assembly according to an embodiment of the invention;
FIG. 6 is a schematic structural view of a rotor disk according to an embodiment of the invention;
FIG. 7 is a schematic structural view of a rotor disk according to another embodiment of the invention;
FIG. 8 is a schematic view of a stator assembly in accordance with the present invention mated to a housing;
fig. 9 is a schematic view of the arrangement of the spoiler rib according to one embodiment of the present invention.
Reference numerals:
an axial-flux electric machine 1 is provided,
a housing 11, an inner housing 112, a protrusion 1121, a mounting hole 11211, an outer housing 113, a cooling water passage 1101, a spoiler 1102, a first end cap 114, a second end cap 115,
the stator assembly 12, the first stator disc 121, the second stator disc 122, the potting adhesive hole 1211, the first stator teeth 123, the second stator teeth 124, the winding 125, the insulating sleeve 126, the stator inner ring 127, the spoiler 1271,
the motor shaft 13 is provided with a plurality of bearings,
the air guide 14, the air guide rib 141, the first air guide rib 1401, the second air guide rib 1402, the rib group 1403, the turbulent flow part 1405,
the rotor disk 15, the inner circular portion 151, the connecting portion 152, the outer circular portion 153, the third air guide rib 154,
a first gap 101, a second gap 102, a third gap 103, a communication hole 104, and a permanent magnet 105.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
An axial-flux electric machine 1 according to an embodiment of the present invention is described below with reference to fig. 1-9.
As shown in fig. 1, 2 and 5, an axial flux motor 1 according to the present invention includes a housing 11, a stator assembly 12, a rotor disc 15 and a motor shaft 13, wherein the stator assembly 12 is disposed in the housing 11, the rotor disc 15 is disposed in the housing 11 and located between the stator assembly 12 and the housing 11, a first gap 101 and a second gap 102 are respectively formed between the housing 11 and the stator assembly 12 and at both sides of the rotor disc 15 in an axial direction, a third gap 103 communicating the first gap 101 and the second gap 102 is formed between a radial outer periphery of the rotor disc 15 and the housing 11, a communication hole 104 communicating the first gap 101 and the second gap 102 is provided on the rotor disc 15, and the motor shaft 13 is inserted through the stator assembly 12 and connected to the rotor disc 15.
The stator assembly 12 of the axial-flux electric machine 1 can generate a magnetic field in an axial direction, the rotor disc 15 is provided with permanent magnets 105, and the magnetic field on the stator assembly 12 is changed to drive the rotor disc 15 to rotate.
In the related art, the axial flux motor 1 generally has a large power density, and the absolute value of the stator heating loss and the heating density are generally larger than those of a common built-in permanent magnet synchronous motor. A more efficient heat dissipation design is needed to fully develop its performance. In the present axial flux motor 1, a water cooling structure having a certain axial length is used on the outer diameter side of the stator assembly 12 to cool the stator assembly. The final radial profile of the stator assembly 12 is typically manufactured to a greater tolerance for assembly and manufacturing. In order to fill up the tolerance of the outer diameter dimension of the stator assembly 12 after molding and reliably dissipate heat, a certain gap is required to be left between the stator assembly 12 and the inner diameter surface of the water cooling structure, then heat conducting glue is used for pouring and casting, and air gaps between the stator assembly and the water cooling structure are sealed and filled, so that the stator is cooled on the single surface of one side of the outer diameter of the stator, the heat conducting glue is small in heat conductivity coefficient and thick in radial volume, large heat transfer resistance is formed, and heat transfer of the water cooling structure is not facilitated.
In the present application, as shown in fig. 2 and 5, a first gap 101 is formed between one axial side of the rotor disk 15 and the housing 11, a second gap 102 is formed between the other axial side of the rotor disk 15 and the stator assembly 12, a third gap 103 is formed between a radially outer edge of the rotor disk 15 and the housing 11, the third gap 103 may communicate a radially outer side of the first gap 101 with a radially outer side of the second gap 102, a communication hole 104 is provided at a radially inner side of the rotor disk 15, and the communication hole 104 may communicate a radially inner side of the first gap 101 with a radially inner side of the third gap 103, so that a circulation air passage is formed inside the axial flux motor 1.
The air flow in the circulation air duct flowing through the second gap 102 may contact the stator assembly 12 to take away heat from the stator assembly 12, and flow to the first gap 101 and the third gap 103 through the communication holes 104 to exchange heat with the housing 11 to reduce the temperature of the stator assembly 12.
The wind guide part 14 is further arranged in the application, the wind guide part 14 is arranged on the rotor disc 15 and protrudes out of the surface of the rotor disc 15, the wind guide part 14 can rotate along with the rotation of the rotor disc 15, the wind guide part 14 can drive airflow in the axial flux motor 1 to flow, the flow velocity of the airflow among the first gap 101, the third gap 103, the second gap 102 and the communication hole 104 is improved, heat generated on the stator component 12 is more quickly dissipated to the shell 11, and the heat dissipation efficiency of the stator component 12 is improved.
According to the axial flux motor 1, the communication hole 104 and the air guide 14 are arranged on the rotor disc 15, so that the flow velocity of air flow in the axial flux motor 1 in the radial direction is increased, heat generated by the rotor and the stator assembly is quickly dissipated to the shell 11, heat exchange is carried out between the heat generated by the rotor and the stator assembly and a low-temperature surface with water cooling radiation in the shell, the heat exchange efficiency between the rotor assembly and the shell 11 is improved, and the use performance of the axial flux motor 1 is improved.
According to an embodiment of the present invention, the wind guide 14 is disposed on at least one side of the rotor disc 15 in the axial direction, the wind guide 14 may be disposed on a side of the rotor disc 15 facing the stator assembly 12, that is, the wind guide 14 is disposed in the second gap 102, and the wind guide 14 is disposed on a side of the rotor disc 15 facing the stator assembly 12, so that the wind guide 14 directly disturbs the airflow on the surface of the stator assembly 12, so as to increase the flow velocity of the airflow flowing through the surface of the stator assembly 12, and thus increase the heat dissipation efficiency of the wind guide 14 on the stator assembly 12.
The air guide 14 may be disposed on a side of the rotor disc 15 facing the casing 11, and disposing the air guide 14 on a side of the rotor disc 15 facing the stator assembly 12 may enable the air guide 14 to directly disturb the airflow on the surface of the casing 11, so as to increase the flow velocity of the airflow flowing through the surface of the casing 11, so as to accelerate the heat exchange efficiency between the casing 11 and the airflow, and enable the heat to be rapidly transferred to the casing 11.
According to an embodiment of the present invention, the air guide 14 includes: the air guiding ribs 141 protrude from the surface of the rotor disc 15, the air guiding ribs 141 are multiple and are arranged at intervals in the circumferential direction of the rotor disc 15, and in the rotating process of the motor shaft 13, the rotor disc 15 drives the air guiding ribs 141 to rotate, so that the air guiding ribs 141 disturb the air flow in the first gap 101 and the second gap 102, the air pressure at each position in the housing 11 is changed, and the air flow circulates in the first gap 101, the third gap 103, the second gap 102 and the communication hole 104.
Further, the plurality of wind guiding ribs 141 are arranged at intervals in the axial direction of the rotor disk 15, each wind guiding rib 141 extends in a direction away from the rotation center of the rotor disk 15 and opposite to the rotation direction of the rotor disk 15, when the motor rotating shaft rotates in the first direction, the bending direction of the wind guiding rib 141 is bent in the second direction opposite to the first direction, and the wind guiding ribs 141 are configured to be bent in the direction opposite to the rotation direction of the rotor disk 15, so that the noise reduction effect of the flux motor can be improved.
As shown in fig. 9, in an embodiment of the present invention, the wind guiding rib 141 may be configured to be bent toward the same direction as the rotation direction of the rotor disk 15, which may improve the disturbance effect of the wind guiding rib 141 on the airflow to some extent, and improve the heat dissipation efficiency of the axial-flux motor 1.
Further, each air guiding rib 141 is tangent to the circular arc at any position, and the radius of the circular arc tangent to the air guiding rib 141 in the direction gradually away from the rotation center of the rotor disk 15 is gradually reduced by the air guiding rib 141. The air guiding ribs 141 are constructed into a line shape of a continuous curve formed by a plurality of sections of circular arcs in a tangent mode, so that the separation of air flow in the radial centrifugal acceleration process can be reduced, and the flowing speed of the air flow is improved; meanwhile, the eddy current phenomenon at the radial outer end of the air guiding rib 141 can be effectively improved, and the noise generated by the axial flux motor 1 is reduced.
The points a-D shown in fig. 9 are all tangent points on the air guiding rib 141, where ρ a, ρ B, ρ C, and ρ D are tangent radii corresponding to the tangent points, a is a radial end of the air guiding rib, and ρ a, < ρ B, < ρ C, < ρ D.
As shown in fig. 4 and 5, according to an embodiment of the present invention, the radially outer end surface of the air guiding rib 141 is provided with a spoiler 1405 protruding in the radial direction, and by providing the spoiler 1405 at the radially outer end of the air guiding rib 141, the spoiler 1405 can increase the linear velocity of the radially outer end of the air guiding rib 141, which helps to increase the wind pressure of the terminal air flow, and the spoiler 1405 can form a plurality of fine vortices at the free end of the air guiding rib 141 to reduce wind noise.
In one embodiment of the present invention, the cross section of the spoiler 1405 may be linear extending perpendicular to the axial direction of the motor shaft 13.
In one embodiment of the present invention, the spoiler portion 1405 may be provided with a groove extending in the axial direction to configure the cross-section of the spoiler portion 1405 into an a-shape or a V-shape.
In one embodiment of the present invention, the spoiler 1405 may be configured to gradually decrease in thickness in a direction away from the rotation center of the rotor disk 15 to form a single-sided oblique cut angle on the spoiler 1405, thereby reducing (increasing the vortex dimension of the blade tip through which the circulating air flow passes) and achieving noise reduction.
As shown in fig. 5, according to an embodiment of the present invention, the dimension of the air guide ribs 141 in the axial direction gradually increases in a direction away from the rotation center of the rotor disk 15. The dimension of the wind guiding ribs 141 in the axial direction may be the thickness of the wind guiding ribs 141 in the axial direction of the rotor disk 15, or it is understood that the dimension of the wind guiding ribs 141 in the axial direction is the height of each wind guiding rib 141.
And the spoiler portion 1405 is disposed at the radial outer end of each air guiding rib 141, and the portion of the spoiler portion 1405 connected to the air guiding ribs 141 may be kept the same as the maximum height of the air guiding ribs 141.
In the process of rotating the rotor disc 15, the speed and the pressure of the air flow close to one side of the circle center of the rotor disc 15 are lower, and smaller blades are used, so that the friction loss is reduced, the motor efficiency is improved, the height of the radial outer end of the air guide rib 141 is higher than that of the radial inner end, the characteristic that the linear speed of the outer ring is higher is fully utilized, the pressurization effect on the air flow is increased, and the flowing speed of the air flow is improved.
As shown in fig. 6, according to an embodiment of the present invention, the wind guide 14 includes a first wind guiding rib 1401 and a second wind guiding rib 1402, the first wind guiding rib 1401 is configured to protrude from the surface of the rotor disk 15, and the first wind guiding ribs 1401 are plural and are arranged at intervals in the circumferential direction of the rotor disk 15; the second wind guiding ribs 1402 are also configured to protrude from the surface of the rotor disk 15, the second wind guiding ribs 1402 are multiple and are arranged at intervals in the circumferential direction of the rotor disk 15, each second wind guiding rib 1402 is disposed between two adjacent first wind guiding ribs 1401, and the radial outer ends of the first wind guiding ribs 1401 and the radial outer ends of the second wind guiding ribs 1402 are arranged in a staggered manner.
The radial inner ends of the first air guiding rib 1401 and the second air guiding rib 1402 may be located on a circle, the circle center of the circle is the center of the rotation center of the rotor disk 15, and the lengths of the first air guiding rib 1401 and the second air guiding rib 1402 are different, so that the radial outer ends of the first air guiding rib 1401 and the second air guiding rib 1402 are staggered with each other.
Through staggering the setting in length with the radial end of first wind-guiding muscle 1401 and second wind-guiding muscle 1402 to make rotor dish 15 can make the air current between the different wind-guiding muscle in the rotation process, can not reach the radial outer end of rotor dish 15 simultaneously, thereby avoid the produced noise stack of air current, can further reduce the produced noise of first wind-guiding muscle 1401 and second wind-guiding muscle 1402 in the rotation process, promote axial magnetic flux motor 1's practicality.
Simultaneously, stagger the setting in length with the radial end of first wind-guiding muscle 1401 and the radial end of second wind-guiding muscle 1402 to convenient vortex portion 1405 is processed out at the end of first wind-guiding muscle 1401 and second wind-guiding muscle 1402, increases the operating space of machining tool, reduces the processing degree of difficulty.
As shown in fig. 6 and 7, in an embodiment of the present invention, the wind guide 14 includes a plurality of rib groups 1403, the rib groups 1403 are configured in a plurality and are sequentially arranged at intervals in the circumferential direction of the rotor disk 15, each rib group 1403 includes a plurality of first wind guide ribs 1401 and a plurality of second wind guide ribs 1402, the plurality of first wind guide ribs 1401 and the plurality of second wind guide ribs 1402 are sequentially arranged at intervals in the circumferential direction of the rotor disk 15, and the radially outer ends of the first wind guide ribs 1401 and the radially outer ends of the second wind guide ribs 1402 are arranged in a staggered manner.
Each rib group 1403 may be configured in a fan shape, a plurality of first air guiding ribs 1401 and a plurality of second air guiding ribs 1402 are provided in each rib group 1403, the plurality of first air guiding ribs 1401 may be sequentially arranged, the plurality of second air guiding ribs 1402 are sequentially arranged, the plurality of first air guiding ribs 1401 and the plurality of second air guiding ribs 1402 are arranged at equal intervals in a fan-shaped area occupied by the rib group 1403, and the plurality of rib groups 1403 are spaced apart from each other to surround the periphery of the rotor disk 15.
The distances between two adjacent first air guiding ribs 1401 or two adjacent second air guiding ribs 1402 or two adjacent first air guiding ribs 1401 and second air guiding ribs 1402 in one rib group 1403 are the same, the distances between two adjacent rib groups 1403 are also the same, but the distance between two adjacent rib groups 1403 is larger than the distance between two adjacent ribs in each rib group 1403.
In some embodiments of the present invention, for the longer radial dimension of the first wind guiding rib 1401 and the second wind guiding rib 1402 in the rotor disk 15, since the radially outer end protrudes from the other wind guiding ribs 141, the spoiler portion 1405 can be more conveniently machined, and various shapes and layouts can be adopted, for example, the spoiler portion 1405 is machined to have a section of W, Y, U, O, A, D, F, H, L, V, N, M, etc., and is machined to have a section of an airfoil shape, a rectangular shape, a triangular shape, a circular shape, an elliptical shape, a hyperbolic shape, a high-order spline curve, a spindle shape, a conical shape, a trapezoidal shape, a rhombic shape, a streamlined shape, an oval shape, or other structures or some combination thereof.
As shown in fig. 4, in one embodiment of the present invention, the rotor disk 15 includes an inner circular portion 151, a connecting portion 152, and an outer circular portion 153, an inner circumferential edge of the inner circular portion 151 is fixed to the motor shaft 13, an inner circumferential edge of the connecting portion 152 is connected to an outer circumferential edge of the inner circular portion 151 and is provided with the communication hole 104, an inner circumferential edge of the outer circular portion 153 is connected to an outer circumferential edge of the connecting portion 152 and is opposite to the stator assembly 12, the outer circular portion 153 is axially staggered from the inner circular portion 151, and the air guide 14 is provided to the outer circular portion 153; the connecting portion 152 is provided with a third air guiding rib 154 extending in the axial direction.
The inner circle part 151 is used for fixing with the motor shaft 13, a motor shaft mounting hole used for matching with the motor shaft 13 is arranged on the inner circle part 151, and a fastener penetrates through the motor shaft mounting hole to fix the rotor disc 15 and the motor shaft 13; a connecting portion 152 provided on the outer periphery of the inner circular portion 151 and extending at least partially in the axial direction, and the communication hole 104 may penetrate the connecting portion 152 in the thickness direction to communicate with the inner end of the second gap 102 in the radial direction at the first gap 101, thereby ensuring that the air flow can circulate; the outer circular portion 153 is provided at a radially outer end of the connecting portion 152 and is spread out in a direction away from the rotation center of the rotor disk 15, and a permanent magnet 105 may be provided at a side of the connecting portion 152 facing the rotor assembly.
The inner circle part 151, the connecting part 152 and the outer circle part 153 are arranged in the rotor disc 15 to configure the cross section of the rotor disc 15 into a "Z" shape, so that a circulation cavity suitable for air flow circulation is formed between the rotor disc 15 and the shell 11 and between the rotor disc and the stator assembly 12, the flow rate of the air flow circulation is improved, and the heat dissipation effect of the axial flux motor 1 is improved.
As shown in fig. 3, further, a third air guiding rib 154 is disposed on the connecting portion 152, the third air guiding rib 154 may be disposed on a surface of the connecting portion 152 facing a rotation center of the rotor disk 15, and the third air guiding rib 154 may generate a certain negative pressure near a center of the rotor disk 15 along with the rotation of the rotor disk 15, so that the air flow can rapidly enter the third gap 103 from the second gap 102 through the communication hole 104. The circulation rate of the airflow is accelerated.
As shown in fig. 3 and 4, according to an embodiment of the present invention, the communication holes 104 are configured in a plurality and arranged at intervals in the circumferential direction of the connection portion 152, the third air guiding rib 154 is provided between two adjacent communication holes 104, and by providing the third air guiding rib 154 at intervals between two adjacent communication holes 104, the air flow passing through the communication holes 104 can be further disturbed, and the flow rate of the air flow can be increased.
In some embodiments of the present invention, the communication hole 104 may be configured as a rectangular hole to increase the area of the communication hole 104 and increase the flow rate of the air current. In other embodiments, the communication hole 104 may be configured as a circular hole, which may reduce the difficulty of machining the rotor disk 15 and the manufacturing cost.
According to an embodiment of the present invention, a receiving cavity is formed in the housing 11 for receiving the stator assembly 12, the rotor disc 15, the motor shaft 13, the wind guide 14, and the like, a cooling water channel 1101 is formed in the housing 11 for cooling the airflow and the stator assembly 12, the stator assembly 12 is disposed in the receiving cavity, an outer circumferential wall of the stator assembly 12 may contact an inner circumferential wall of the housing 11 to transfer heat generated by the stator assembly 12 to the housing 11 and further radiate the heat to the housing 11 through the cooling water channel 1101, so as to cool the stator assembly 12, thereby optimizing a heat radiation effect of the axial flux motor 1.
Further, the wind guide 14 disposed on the rotor disc 15 can rotate synchronously with the rotor disc 15 to drive the airflow in the cavity of the housing 11, so as to further improve the heat dissipation efficiency of the stator assembly 12, and the airflow contacts the axial surface of the stator assembly 12 and passes through the housing 11 in the flowing process, so as to transfer the heat generated by the stator assembly 12 to the housing 11, so as to further improve the heat dissipation effect of the axial flux motor 1.
According to the axial flux motor 1 of the present invention, the cooling water channel 1101 is provided in the housing 11, the wind guide 14 is provided on the rotor disk 15, the outer periphery of the stator assembly 12 can dissipate heat by directly contacting with the housing 11, and the axial surface of the stator assembly 12 can dissipate heat by exchanging heat between the airflow and the housing 11.
As shown in fig. 1, according to one embodiment of the present invention, the stator assembly 12 includes: the stator comprises a first stator disc 121, a second stator disc 122, a first stator tooth 123, a second stator tooth 124, a winding 125 and a stator inner ring 127, wherein the first stator disc 121 and the second stator disc 122 are arranged at intervals in the axial direction, a plurality of winding mounting holes arranged at intervals in the circumferential direction are arranged on the first stator disc 121 and the second stator disc 122 in a one-to-one correspondence manner, the first stator tooth 123 and the second stator tooth 124 are constructed in a plurality of one-to-one correspondence manner, the first stator tooth 123 is arranged in the winding mounting hole on the first stator disc 121, and the second stator tooth 124 is arranged in the winding mounting hole on the second stator disc 122; the winding 125 is configured in a plurality and wound on the corresponding first stator tooth 123 and second stator tooth 124; as shown in fig. 8, the stator inner ring 127 is disposed between the first stator disc 121 and the second stator disc 122 and located radially inside the plurality of windings 125, and a spoiler 1271 is disposed on the stator inner ring 127 to increase a contact area between the stator assembly 12 and air and increase a heat exchange speed between the axial-flux motor 1 and the air.
Further, the outer periphery of the stator teeth is provided with an insulating sleeve 126, and the winding 125 is wound on the insulating sleeve 126 corresponding to the outer periphery of the stator teeth.
As shown in fig. 1, according to an embodiment of the present invention, the inner surface of the housing 11 is provided with a protrusion 1121 protruding from the surrounding receiving cavity in the radial direction, and the first stator disc 121 and the second stator disc 122 are respectively abutted against and fixedly connected to both sides of the protrusion 1121 in the axial direction.
The first stator disc 121 and the second stator disc 122 are respectively fixedly connected with two axial sides of the protrusion 1121, the first stator disc 121 and the second stator disc 122 may be a framework structure of the stator assembly 12, the first stator disc 121 and the second stator disc 122 are provided with a plurality of windings 125, by fixing the first stator disc 121 and the second stator disc 122 with the protrusion 1121, the fixed connection between the stator assembly 12 and the housing 11 may be achieved, and the protrusion 1121 may contact with each component in the stator assembly 12, so that heat generated by the stator assembly 12 is transferred to the cooling water channel 1101 in the housing 11 through the protrusion 1121, so as to improve heat transfer efficiency.
According to an embodiment of the present invention, the housing 11 includes an inner housing 112 and an outer housing 113, the inner housing 112 defines an accommodating cavity therein, and the inner surface of the inner housing 112 is provided with the above-mentioned protrusion 1121; outer shell 113 is disposed around an outer periphery of inner shell 112 and spaced apart from at least a portion of inner shell 112 to define a cooling water channel 1101.
Through setting up outer casing 113 and inner casing 112 and making at least part of inner casing 112 and outer casing 113 separate in order to form cooling water course 1101, can reduce the degree of difficulty of arranging of cooling water course 1101, make things convenient for the processing of casing 11 structure, also guaranteed the leakproofness of cooling water course 1101, be provided with inlet channel and the exhalant canal with cooling water course 1101 intercommunication on outer casing 113 to be convenient for be connected cooling water course 1101 with outside water cooler system.
According to an embodiment of the present invention, the protrusion 1121 is provided with a plurality of mounting holes 11211 adapted for fasteners to pass through, the cooling water channel 1101 is configured as a circumferential wave-shaped water channel to avoid the mounting holes 11211, the circumferential wave-shaped cooling water channel 1101 can avoid a fixed connection between the motor stator and the housing 11 so as to be tightly attached to the motor stator to the maximum, and the wave-shaped design can increase a heat exchange contact area between the cooling liquid in the circumferential wave-shaped cooling water channel 1101 and the motor stator, so that the heat dissipation capability and the service life of the motor can be effectively improved, and the safety of the vehicle can be further improved.
The circumferential undulating cooling water channel 1101 is a cavity structure suitable for flowing of cooling liquid, and the circumferential undulating cooling water channel 1101 includes: protruding section and sunken section, protruding section are outside the radial protrusion in casing 11 in order to dodge mounting hole 11211, and sunken section is sunken towards the radial inboard of casing 11 to further press close to the internal surface of casing 11, make circumference wave cooling water course 1101 can be closer to stator module 12, thereby make the coolant liquid in the circumference wave cooling water course 1101 can be more rapid take away the heat, and then improved axial flux motor 1's radiating efficiency. This application can make the thickness of casing 11 reduce through setting up circumference wave cooling water course 1101 for axial flux motor 1's casing 11 structure is compacter, has guaranteed axial flux motor 1's radiating effect simultaneously.
Further, the wavy turbulence ribs 1102 can further increase the heat exchange area between the cooling liquid in the circumferential wavy cooling water channel 1101 and the shell 11, so that the heat exchange efficiency of the motor stator is further improved.
According to an embodiment of the invention, the casing 11 further comprises a first end cap 114 and a second end cap 115, the first end cap 114 and the second end cap 115 being respectively fixed with the outer casing 113 to close the containment cavity, the rotor disc 15 being configured in two and being provided with a first clearance 101 with the first end cap 114 and the second end cap 115 respectively. The first end cap 114 and the second end cap 115 can seal the accommodation space in the housing 11 and protect the rotor disc 15 and the stator assembly 12 inside the housing 11.
At least one of the first end cap 114 and the second end cap 115 is provided with a potting adhesive hole 1211, after the first end cap 114 and the second end cap 115 are fixed to the protrusion 1121, the stator assembly 12 is disposed between the first end cap 114 and the second end cap 115, and heat-conducting adhesive is poured into a space defined by the first end cap 114, the second end cap 115 and the protrusion 1121 through the potting adhesive hole 1211, so that the space between the winding 125 and the protrusion 1121 is filled, heat generated by the winding 125 is transferred to the housing 11 through the heat-conducting adhesive, and the heat-conducting efficiency of the axial flux motor 1 is improved.
According to an embodiment of the present invention, the first end cover 114 and the second end cover 115 are respectively provided with a first bearing and a second bearing adapted to cooperate with the motor shaft 13, at least one of the first bearing and the second bearing is configured as a thrust bearing or a double-row angular contact bearing, and the motor shaft 13 in the axial flux motor 1 generates a certain axial force, so that, by configuring one of the first bearing and the second bearing as a thrust bearing or a double-row angular contact bearing, the bearing can bear an axial load, the stability of the motor shaft 13 is improved, and the reliability of the axial flux motor 1 is prolonged.
According to an embodiment of the present invention, the rotor disks 15 are configured as a plurality of disks respectively connected to the motor shaft 13, the rotor disks 15 are arranged at intervals in the axial direction of the motor shaft 13, the stator assembly 12 is disposed between two adjacent rotor disks 15, and the permanent magnet 105 is disposed on each rotor disk 15, the axial flux motor 1 according to the present application can provide torque for the rotation of the rotor disks 15 by disposing a plurality of stator assemblies 12 to improve the performance of the axial flux motor 1, and the wind guide 14 can be disposed on each rotor disk 15 to ensure the flow rate of the air flow in the axial flux motor 1 and improve the heat dissipation effect of the axial flux motor 1.
A plurality of cooling water channels 1101 and protrusions 1121 may be provided on the housing 11, each protrusion 1121 may be provided corresponding to a corresponding cooling water channel 1101, one protrusion 1121 may be fixed to a corresponding stator assembly 12, and the cooling water channel 1101 corresponding to the protrusion 1121 may dissipate heat to the corresponding stator assembly 12, thereby ensuring a heat dissipation effect of each stator assembly 12.
The vehicle according to the present invention is briefly described below.
The vehicle provided with the axial flux motor 1 of the embodiment is good in dynamic performance, service life and reliability of the vehicle are improved, cost is low, and certain price advantage is achieved.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.
In the description of the present invention, "a plurality" means two or more.
In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.
In the description of the invention, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An axial flux motor, comprising:
a housing (11);
a stator assembly (12), the stator assembly (12) disposed within the housing (11);
a rotor disc (15), wherein the rotor disc (15) is arranged in the housing (11) and located between the stator assembly (12) and the housing (11), a first gap (101) and a second gap (102) are respectively formed between the two sides of the rotor disc (15) in the axial direction and the housing (11) and the stator assembly (12), a third gap (103) communicating the first gap (101) and the second gap (102) is formed between the radial outer periphery of the rotor disc (15) and the housing (11), and a communication hole (104) communicating the first gap (101) and the second gap (102) is arranged on the rotor disc (15);
the motor shaft (13), the said motor shaft (13) is worn and set up the said stator pack (12) and couples to said rotor disc (15);
the air guide piece (14) is arranged on the rotor disc (15) and protrudes out of the surface of the rotor disc (15) so as to drive airflow to circularly flow in a cavity formed by the first gap (101), the third gap (103), the second gap (102) and the communication hole (104).
2. Axial flux machine according to claim 1, wherein the wind deflector (14) is arranged on at least one side in the axial direction of the rotor disc (15).
3. Axial-flux electrical machine according to claim 2, wherein said air guide (14) comprises: the wind guide ribs (141) protrude out of the surface of the rotor disc (15), the wind guide ribs (141) are arranged at intervals in the circumferential direction of the rotor disc (15), and each wind guide rib (141) extends towards the direction opposite to the rotation direction of the rotor disc (15) in the direction away from the rotation center of the rotor disc (15).
4. An axial-flux electrical machine according to claim 3, wherein each of the wind-guiding bars (141) is tangent to an arc at any position, the wind-guiding bars (141) having a radius of the arc tangent to the wind-guiding bar (141) that decreases in a direction gradually away from the rotation center of the rotor disc (15).
5. The axial flux machine of claim 4, wherein the radially outer end face of the air conduction rib (141) is provided with a spoiler (1405) projecting in the radial direction.
6. An axial-flux electrical machine according to claim 5, wherein the dimension of the wind-guiding fins (141) in axial direction increases gradually in a direction away from the centre of rotation of the rotor disc (15).
7. Axial-flux electrical machine according to claim 2, wherein said air guide (14) comprises:
a plurality of first wind guiding ribs (1401), wherein the first wind guiding ribs (1401) are configured to be protruded out of the surface of the rotor disc (15), and the first wind guiding ribs (1401) are arranged at intervals in the circumferential direction of the rotor disc (15);
a plurality of second air guiding ribs (1402), wherein the first air guiding ribs (1401) are configured to protrude out of the surface of the rotor disc (15), the second air guiding ribs (1402) are arranged at intervals in the circumferential direction of the rotor disc (15), and each second air guiding rib (1402) is arranged between two adjacent first air guiding ribs (1401); wherein
The radial outer end of the first air guiding rib (1401) and the radial outer end of the second air guiding rib (1402) are arranged in a staggered mode.
8. Axial-flux electrical machine according to claim 2, wherein said air guide (14) comprises:
a plurality of rib groups (1403), the rib groups (1403) being configured in plurality and arranged at intervals in the circumferential direction of the rotor disk (15) in sequence, each of the rib groups (1403) including: a plurality of first air guiding ribs (1401) and a plurality of second air guiding ribs (1402), wherein the first air guiding ribs (1401) and the second air guiding ribs (1402) are sequentially arranged at intervals in the circumferential direction of the rotor disc (15); wherein
The radial outer end of the first air guiding rib (1401) and the radial outer end of the second air guiding rib (1402) are arranged in a staggered mode.
9. Axial flux machine according to claim 2, wherein the rotor disc (15) comprises:
an inner circular portion (151), an inner circumferential edge of the inner circular portion (151) being connected to the motor shaft (13);
a connecting portion (152) having an inner peripheral edge connected to an outer peripheral edge of the inner circular portion (151) and provided with the communication hole (104);
an outer circle part (153), wherein the inner circumference of the outer circle part (153) is connected with the outer circumference of the connecting part (152) and is opposite to the stator assembly (12), the outer circle part (153) and the inner circle part (151) are arranged in a staggered mode in the axial direction, and the air guide piece (14) is arranged on the outer circle part (153); wherein
The connecting portion (152) is provided with a third air guiding rib (154) extending in the axial direction.
10. The axial flux motor according to claim 9, wherein the communication holes (104) are configured in plurality and arranged at intervals in a circumferential direction of the connecting portion (152), and the third air-guide rib (154) is provided between adjacent two of the communication holes (104).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110118452.XA CN113612329A (en) | 2021-01-28 | 2021-01-28 | Axial flux electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110118452.XA CN113612329A (en) | 2021-01-28 | 2021-01-28 | Axial flux electric machine |
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| Publication Number | Publication Date |
|---|---|
| CN113612329A true CN113612329A (en) | 2021-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110118452.XA Pending CN113612329A (en) | 2021-01-28 | 2021-01-28 | Axial flux electric machine |
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Cited By (1)
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| CN116526795A (en) * | 2023-06-29 | 2023-08-01 | 深圳小象鸿业机电有限公司 | Efficient radiating axial flux motor |
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