CN117477819A - Axial flux permanent magnet motor - Google Patents

Abstract

The invention discloses an axial flux permanent magnet motor, which comprises a rotor assembly and a stator assembly, wherein the rotor assembly and the stator assembly penetrate through a rotating shaft, the stator assembly comprises an end cover, a stator iron core, a stator pressing plate, a coil, a sealing plate and a stator shell, one side of the end cover is provided with a placement ring groove, and one end of the stator iron core, which is not provided with stator teeth, is placed in the placement ring groove; the stator pressing plate is sleeved at the root of the stator teeth, and the coil is sleeved on the stator teeth; the sealing plate is sleeved at the top end of the stator tooth; the stator shell is arranged between the stator pressing plate and the sealing plate, sleeved on the outer side of the stator core, and provided with an oil inlet and an oil outlet which are arranged through the shell wall. The axial flux permanent magnet motor has the advantages that the sealing performance of the stator assembly is better, the cooling effect is good, the sealing structure does not occupy the air gap space of the motor, and the motor performance is better.

Description

Axial flux permanent magnet motor

Technical Field

The invention relates to the technical field of axial motors, in particular to an axial flux permanent magnet motor.

Background

Copper loss is generated in the coil during normal operation of the motor, iron loss is generated in the stator core, permanent magnet eddy current loss is also generated in the rotor part, and the losses are converted into heat to be transmitted outwards. When the heat dissipation capacity of the motor is insufficient, the temperature of the motor can be too high. For the stator part, too high a temperature can destroy the insulation of the coil and further cause the coil to be short-circuited, resulting in the motor burning. For the rotor part, when the temperature of the permanent magnet is too high, the permanent magnet can be irreversibly demagnetized, so that the motor cannot work normally. Therefore, in order for the motor to operate safely and reliably, a cooling structure must be provided for the motor to dissipate heat. The cooling mode of the motor mainly comprises air cooling, water cooling and oil cooling, and the oil cooling effect is best in the three cooling modes, but the motor has higher requirements on the tightness.

For the existing double-stator single-rotor axial flux permanent magnet motor, a stator core is generally fixed with a motor end cover through bolts, and if a stator oil cooling mode is adopted, cooling medium oil is easy to leak outwards along the bolts, so that the motor is poor in tightness.

Disclosure of Invention

In view of the above, the invention provides an axial flux permanent magnet motor, the stator assembly has better sealing performance and cooling effect, the sealing structure does not occupy the air gap space of the motor, and the motor performance is better.

In order to achieve the above purpose, the present invention provides the following technical solutions:

an axial flux permanent magnet motor, including wearing to locate epaxial rotor assembly and stator assembly, the stator assembly includes:

the end cover is provided with a placement ring groove at one side;

the stator core is provided with stator teeth on one end face, and the end face, without the stator teeth, of the stator core is placed in the placement ring groove;

the stator pressing plate is sleeved at the root of the stator teeth and used for fixing the stator iron core;

the coil is sleeved on the stator teeth;

the sealing plate is sleeved at the top end of the stator tooth and used for limiting the coil and forming a sealing cavity;

the stator shell is arranged between the stator pressing plate and the sealing plate, sleeved on the outer side of the stator core, and provided with an oil inlet and an oil outlet which are arranged through the shell wall.

Optionally, a first shaft hole for the rotation shaft to pass through is formed in the center of the end cover, a first connecting ring table and a second connecting ring table which are arranged in a stepped manner are arranged at the position, close to the first shaft hole, of the placement ring groove, the first connecting ring table is sleeved on the outer side of the second connecting ring table, and the height of the second connecting ring table is larger than that of the first connecting ring table;

the first connecting ring table is used for being connected with the stator pressing plate, and the second connecting ring table is used for being connected with the sealing plate.

Optionally, a first tooth-shaped hole is formed in the stator pressing plate, the first tooth-shaped hole is arranged corresponding to the stator teeth of the stator core, and the first tooth-shaped hole is used for being sleeved on the stator teeth;

the number of the first tooth-shaped holes is the same as the number of the stator teeth.

Optionally, a second shaft hole for passing through the rotating shaft is formed in the center of the stator pressing plate;

the stator pressing plate is provided with a first connecting through hole and a second connecting through hole, the first connecting through hole is arranged close to the second shaft hole and used for penetrating a first fastening screw used for positioning the stator pressing plate, and the first fastening screw is connected to the end cover; the second connecting through hole is arranged close to the edge of the stator pressing plate and used for penetrating the motor fastening screw.

Optionally, a second tooth-shaped hole is formed in the sealing plate, the second tooth-shaped hole is arranged corresponding to the stator teeth of the stator core, and the second tooth-shaped hole is used for being sleeved on the stator teeth;

the number of the second tooth-shaped holes is the same as the number of the stator teeth.

Optionally, a third shaft hole for passing through the rotating shaft is formed in the center of the sealing plate;

the sealing plate is provided with a third connecting through hole and a fourth connecting through hole, the third connecting through hole is close to the third shaft hole and is used for penetrating a second fastening screw for positioning the sealing plate, and the second fastening screw is connected to the end cover; the fourth connecting through hole is arranged close to the edge of the sealing plate and used for penetrating through a motor fastening screw.

Optionally, a first annular sealing table and a second annular sealing table are arranged on the surface, close to the coil, of the sealing plate;

the first annular sealing platform is arranged close to the third shaft hole, the first annular sealing platform is wound on the outer side of the third connecting through hole, the inner side surface of the first annular sealing platform is arranged on the outer side of a second connecting annular platform on the end cover, and the second connecting annular platform is used for being connected with the second fastening screw;

the second annular sealing platform is arranged close to the fourth connecting through hole, the second annular sealing platform is wound on the inner side of the fourth connecting through hole, and the outer side face of the second annular sealing platform is arranged on the inner side face of the stator shell.

Optionally, the rotor assembly includes:

the magnetic steel holding device comprises a holding frame, wherein a plurality of magnetic steel holding grooves are formed in the holding frame, and the magnetic steel holding grooves are uniformly distributed around the axis of the holding frame;

the magnetic steels are placed in the magnetic steel placing grooves, and the number and the shape of the magnetic steels are the same as those of the magnetic steel placing grooves;

and the rotor shell is sleeved on the outer side of the retainer and is connected with the stator assembly.

Optionally, the retainer comprises a first sub-retainer and a second sub-retainer which are spliced together, and the first sub-retainer and the second sub-retainer have the same structure;

the first sub-retainer and the second sub-retainer are fixedly connected, and the magnetic steel is adhered in the magnetic steel placing grooves of the first sub-retainer and the second sub-retainer.

Optionally, the rotor assembly and the stator assembly are fixedly connected through a motor fastening screw;

the rotor shell is provided with a plurality of fifth connecting through holes, the fifth connecting through holes are threaded holes, and the motor fastening screw penetrates through the through holes in the stator assembly to be connected in the fifth connecting through holes.

According to the technical scheme, the stator core is pressed on the end cover to be positioned through the stator pressing plate, so that the situation that the stator core is connected with the motor end cover through bolts in the prior art is avoided, leakage of cooling medium oil along the connecting bolts is avoided, and the tightness is better. One end of the stator assembly is sealed through the end cover, the other end of the stator assembly is sealed through the sealing plate, so that a sealed cavity is formed, cooling medium oil enters the stator assembly from the oil inlet and flows out from the oil outlet, and oil cooling of the stator assembly is formed, and the cooling performance is good. Because the sealing plate is sleeved on the stator teeth, and is not directly pressed outside the stator teeth to seal, the gap (air gap) between the motor rotor and the stator core cannot be changed due to the arrangement of the sealing plate, namely, the sealing plate cannot occupy the air gap space of the motor, so that the motor performance is better.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic cross-sectional structure of an axial flux permanent magnet motor according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of an assembly structure of a stator assembly according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of an exploded structure of a stator assembly according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of an end cap according to an embodiment of the present invention;

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

fig. 6 is a schematic structural diagram of a stator pressing plate according to an embodiment of the present invention;

FIG. 7 is a schematic structural view of a sealing plate according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a stator housing according to an embodiment of the present invention;

fig. 9 is a schematic diagram of an arrangement structure of coils according to an embodiment of the present invention;

FIG. 10 is a schematic view of an exploded construction of a rotor assembly according to an embodiment of the present invention;

FIG. 11 is a schematic structural view of a cage according to an embodiment of the present invention;

fig. 12 is a schematic structural view of a first sub-holder according to an embodiment of the present invention;

fig. 13 is a schematic diagram of an arrangement structure of magnetic steel according to an embodiment of the present invention;

fig. 14 is a schematic view of a partial explosion structure of an axial flux permanent magnet motor according to an embodiment of the present invention.

Wherein:

1. an end cover is arranged on the inner side of the shell,

101. a sixth connecting through hole 102, a placing ring groove 103, a first connecting ring table 104, a second connecting ring table 105, a first threaded blind hole 106, a second threaded blind hole 107, a first shaft hole,

2. the coil is arranged in a loop of wire,

3. a stator pressing plate,

301. a first tooth-shaped hole 302, a second connecting through hole 303, a first connecting through hole 304, a second shaft hole,

4. a sealing plate for sealing the inner surface of the cylinder,

401. fourth connecting through holes 402, first annular sealing platforms, 403, second toothed holes 404, third connecting through holes 405, second annular sealing platforms, 406, third shaft holes,

5. the retainer is arranged on the inner side of the frame,

501. a first sub-retainer 5011, a first sub-magnetic steel placing groove 5012 and a fourth shaft hole,

502. a second sub-holding frame is arranged on the first sub-holding frame,

6. the stator core is provided with a plurality of stator cores,

601. the teeth of the stator are arranged on the outer surface of the stator,

7. an oil inlet,

8. a stator housing,

801. a seventh connecting through-hole is provided,

9. the motor is fastened by a screw,

10. a rotating shaft is arranged on the upper part of the rotating shaft,

11. an oil outlet is arranged at the bottom of the oil tank,

12. the first fastening screw is provided with a first fastening screw,

13. a second fastening screw is provided for the first fastening screw,

14. a magnetic steel is arranged on the inner surface of the steel plate,

15. a rotor housing.

Detailed Description

The invention discloses an axial flux permanent magnet motor, which has better sealing performance and cooling effect of a stator assembly, and has better motor performance, wherein a sealing structure does not occupy an air gap space of the motor.

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1 to 14, the axial flux permanent magnet motor of the present invention includes a rotor assembly and a stator assembly penetrating through a rotating shaft 10. The stator assembly comprises an end cover 1, a stator core 6, a stator pressing plate 3, a coil 2, a sealing plate 4 and a stator shell 8, wherein a placement ring groove 102 is formed in one side of the end cover 1, the placement ring groove 102 is correspondingly arranged with the stator core 6, one end face of the stator core 6 is provided with stator teeth 601, the other end face is not provided with the stator teeth 601, and one end of the stator core 6, which is not provided with the stator teeth 601, is placed in the placement ring groove 102. The stator pressing plate 3 is sleeved at the root of the stator tooth 601 and is pressed on the bottom surface of the stator groove of the stator core 6, so that the stator core 6 is pressed and fixed. The coil 2 is sleeved on the stator teeth 601. The sealing plate 4 is sleeved on the top end of the stator tooth 601 and is used for limiting the coil 2 and forming a sealing chamber which is convenient for cooling the cooling medium oil. The stator shell 8 is arranged between the stator pressing plate 3 and the sealing plate 4, and is sleeved on the outer side of the stator core 6, and the stator shell 8 is provided with an oil inlet 7 and an oil outlet 11 which are arranged through the shell wall. The sealing plate 4 is used for sealing one side of the stator assembly, and the end cover 1 is used for sealing the other side of the stator assembly. The gap between the sealing plate 4 and the tooth top of the stator tooth 601 is filled with sealing glue or pouring sealant, so that the filled sealing glue is flush with the tooth top of the stator tooth 601, and reliable sealing of the end is realized.

The coil 2 is wound by enameled wires or flat copper wires, and is electrified to generate a magnetic field, and copper loss generated by the coil itself can be converted into heat to be transmitted outwards. The stator core 6 is an important component forming a magnetic flux circuit of the motor, is formed by punching and rolling ferromagnetic materials (such as silicon steel sheets), and generates iron loss and converts the iron loss into heat to be transmitted outwards when the motor normally operates. The rotor is the rotating part of the motor, including the rotor disk and the permanent magnets.

According to the axial flux permanent magnet motor, the stator core 6 is pressed on the end cover 1 through the stator pressing plate 3 to be fixed, so that the situation that the stator core is connected with the motor end cover through bolts in the prior art is avoided, leakage of cooling medium oil along the connecting bolts is avoided, and the tightness is better. One end of the stator assembly is sealed through the end cover 1, the other end of the stator assembly is sealed through the sealing plate 4, so that a sealed cavity is formed, cooling medium oil enters the stator assembly from the oil inlet 7 and flows out from the oil outlet 11, oil cooling of the stator assembly is formed, and the cooling performance is good. Because the sealing plate 4 is sleeved on the stator teeth 601, and is not directly pressed outside the stator teeth 601 to seal, the gap (air gap) between the motor rotor and the stator core 6 cannot be changed due to the arrangement of the sealing plate 4, namely, the sealing plate 4 cannot occupy the air gap space of the motor, so that the motor performance is better.

Specifically, a first shaft hole 107 for the rotation shaft 10 to pass through is formed in the center of the end cover 1, a first connecting ring stage 103 and a second connecting ring stage 104 which are arranged in a stepped manner are arranged at positions, close to the first shaft hole 107, of the placement ring groove 102, the first connecting ring stage 103 is sleeved on the outer side of the second connecting ring stage 104, and the height of the second connecting ring stage 104 is larger than that of the first connecting ring stage 103, as shown in fig. 4. The first connection ring 103 is used for connecting with the stator pressing plate 3, and the second connection ring 104 is used for connecting with the sealing plate 4. In one embodiment, in order to enable the stator pressing plate 3 to be pressed against both the edge position of the end cover 1 and the bottom surface of the stator slot of the stator core 6 during connection, the distance between the bottom surface of the stator slot of the stator core 6 and the end surface of the stator core 6 where the stator teeth 601 are not provided is the same as the depth of the placement ring groove 102. The edge of the end cap 1 is provided with a sixth connecting through hole 101. In order to facilitate connection of the first connecting ring stage 103 and the stator pressing plate 3, a plurality of first threaded blind holes 105 are formed in the first connecting ring stage 103, and the plurality of first threaded blind holes 105 are uniformly distributed around the first shaft hole 107. In order to facilitate connection of the second connecting ring table 104 and the sealing plate 4, a plurality of second threaded blind holes 106 are formed in the second connecting ring table 104, and the second threaded blind holes 106 are uniformly distributed around the first shaft hole 107. The stator core 6 is a stator core in the prior art, and as shown in fig. 5, a plurality of stator teeth 601 are provided on the stator core 6.

In order to facilitate the stator pressing plate 3 to be sleeved on the stator teeth 601 of the stator core 6, the stator pressing plate 3 is provided with a first tooth-shaped hole 301, the first tooth-shaped hole 301 is correspondingly arranged with the stator teeth 601 of the stator core 6, and the corresponding arrangement refers to the corresponding arrangement of the shape and the size. The first tooth-shaped hole 301 is used for sleeving the stator tooth 601. It will be appreciated that the number of first toothed holes 301 is the same as the number of stator teeth 601.

In order to facilitate the passage of the rotation shaft 10, a second shaft hole 304 for the passage of the rotation shaft 10 is provided at the center of the stator pressing plate 3. For positioning the stator pressing plate 3, a first connection through hole 303 and a second connection through hole 302 are provided on the stator pressing plate 3, as shown in fig. 6. The first connecting through hole 303 is disposed near the second shaft hole 304, the first connecting through hole 303 is used for penetrating the first fastening screw 12 positioned on the stator pressing plate 3, and the first fastening screw 12 penetrates through the first connecting through hole 303 and is connected to a corresponding position of the end cover 1. Specifically, the stator pressing plate 3 is connected to the first threaded blind hole 105 through the first fastening screw 12, and the second shaft hole 304 is sleeved on the outer side of the second connecting ring table 104. The number and positions of the first connecting through holes 303 correspond to those of the first blind threaded holes 105. The second connecting through hole 302 is provided near the edge of the stator pressing plate 3 for penetrating the motor fastening screw 9. The second connecting through holes 302 are provided with a plurality of second connecting through holes 302 which are uniformly distributed.

Further, as shown in fig. 7, the sealing plate 4 is provided with second tooth-shaped holes 403, the second tooth-shaped holes 403 are arranged corresponding to the stator teeth 601 of the stator core 6, the positions and the sizes of the second tooth-shaped holes 403 correspond to the stator teeth 601, the second tooth-shaped holes 403 are used for being sleeved on the stator teeth 601, and it can be understood that the number of the second tooth-shaped holes 403 is the same as the number of the stator teeth 601.

In order to facilitate the passage of the rotary shaft 10, a third shaft hole 406 for the passage of the rotary shaft 10 is provided at the center of the sealing plate 4. The sealing plate 4 is provided with a third connecting through hole 404 and a fourth connecting through hole 401, the third connecting through hole 404 is close to the third shaft hole 406 and is used for penetrating a second fastening screw 13 positioned on the sealing plate 4, the second fastening screw 13 is connected to the end cover 1, and the second connecting ring table 104 is used for being connected with the second fastening screw 13. Specifically, the second fastening screw 13 is screwed into the second threaded blind hole 106 after passing through the third connecting through hole 404, thereby fixedly connecting the sealing plate 4 to the end cap 1. The fourth connecting through hole 401 is provided near the edge of the sealing plate 4 for penetrating the motor fastening screw 9. The motor fastening screw 9 is used for fixedly connecting the stator and the rotor of the motor. The third connection through-hole 404 and the fourth connection through-hole 401 are each provided with a plurality of.

The stator housing 8 is in an annular structure, and for convenience in fixing, seventh connecting through holes 801 are formed in the end face of the stator housing 8 in the vertical axial direction, a plurality of seventh connecting through holes 801 are formed in the seventh connecting through holes 801, and the plurality of seventh connecting through holes 801 are uniformly distributed around the axis. The oil inlet 7 and the oil outlet 11 are fixedly arranged on the side wall of the stator shell 8 and are communicated, so that cooling medium oil can cool the inside of the stator conveniently.

In order to improve the sealing performance of the sealing plate 4, a first annular sealing land 402 and a second annular sealing land 405 are provided on the face of the sealing plate 4 close to the coil 2. The first annular sealing platform 402 is disposed near the third shaft hole 406, and the first annular sealing platform 402 is wound around the outer side of the third connecting through hole 404, where the outer side refers to the side of the third connecting through hole 404 away from the third shaft hole 406, so as to avoid leakage of the medium oil along the connecting gap of the third connecting through hole 404. In order to avoid leakage of cooling oil in the stator, the inner side surface of the first annular sealing table 402 is arranged on the outer side of the second connecting ring table 104 on the end cover 1, and the inner side surface of the first annular sealing table 402 is attached to the outer side surface of the second connecting ring table 104, so that leakage is avoided. The second annular sealing platform is disposed near the fourth connecting through hole, and the second annular sealing platform 405 is wound on the inner side of the fourth connecting through hole 401, where the inner side refers to the side of the fourth connecting through hole 401 near the third shaft hole 406. The outer side surface of the second annular sealing land 405 is disposed on the inner side surface of the stator housing 8, thereby avoiding leakage of the cooling liquid. Correspondingly, a third annular sealing table is arranged on the surface, close to the sealing plate 4, of the stator pressing plate 3, the third annular sealing table is correspondingly arranged with the second annular sealing table 405, and after installation and positioning, the third annular sealing table is contacted with the end surface, close to the second annular sealing table 405, of the second annular sealing table to form a sealing structure.

In an embodiment, the rotor assembly includes a cage 5, magnetic steel 14 and a rotor housing 15, a plurality of magnetic steel placing grooves are arranged on the cage 5, and a plurality of magnetic steel placing grooves are uniformly distributed around the axis of the cage 5. The magnetic steel 14 is placed in the magnetic steel placing grooves, and the number and the shape of the magnetic steel 14 are the same as those of the magnetic steel placing grooves. The rotor housing 15 is sleeved on the outer side of the retainer 5 to form a rotor protection shell, and the rotor housing 15 is connected with the stator assembly through the motor fastening screw 9. The rotor housing 15 is provided with a plurality of fifth connecting through holes, as shown in fig. 10, wherein the fifth connecting through holes are threaded holes, and the motor fastening screw 9 penetrates through the through holes on the stator assembly to be connected in the fifth connecting through holes. The rotor assembly and the stator assembly are fixedly connected through motor fastening screws 9.

Further, the holder 5 includes a first sub holder 501 and a second sub holder 502 which are spliced together, and as shown in fig. 10 and 11, the first sub holder 501 and the second sub holder 502 have the same structure. Referring to fig. 12, the first sub-holder 501 is provided with a fourth shaft hole 5012 and a first sub-magnetic steel placement groove 5011, and the fourth shaft hole 5012 is provided at the center of the first sub-holder 501. The first magnetic steel separating placing grooves 5011 are provided with a plurality of first magnetic steel separating placing grooves 5011 which are uniformly distributed around the fourth shaft hole 5012. The specific structure of the second sub holder 502 refers to the specific structure of the first sub holder 501, and will not be described herein. The first sub-holder 501 and the second sub-holder 502 are fixedly connected, specifically, the two holders can be fixedly connected by adopting bonding glue, screw fastening (not shown in the figure) or bonding and screw connection combination. The magnetic steel 14 is adhered in the magnetic steel placing grooves of the first sub-holder 501 and the second sub-holder 502. The rotor structure consists of two identical and fixedly connected sub-holding frames and magnetic steel, has simple structure and can effectively enhance the structural strength of the motor rotor.

In one embodiment, as shown in fig. 1 and 14, the axial flux permanent magnet machine of the present invention includes two stator assemblies and a rotor assembly disposed between the two stator assemblies. The specific assembly process of the axial flux permanent magnet motor comprises the following steps: after the stator core 6 is manufactured, the stator core 6 is placed in the placement ring groove 102 of the end cover 1. The stator pressing plate 3 is pressed into the bottom of the stator slot through the stator teeth 601, and the stator pressing plate 3 is locked by the first fastening screw 12 to fasten the stator core 6 to the end cover 1. One end face of the stator shell 8 is attached to the end face of the stator pressing plate 3, and is locked in advance by a motor fastening screw 9. The coil 2 is fitted over each stator tooth 601. The coil 2 is compressed by passing the sealing plate 4 through the stator teeth 601, the sealing at this time, 4 simultaneously functioning as a slot wedge, the sealing plate 4 being fastened by the second fastening screw 13, and the motor fastening screw 9 being locked to the sealing plate 4. After the above operation is completed, the gap between the sealing plate 4 and the tooth top of the stator tooth 601 is filled with a sealant or potting adhesive so that the filled sealant is flush with the tooth top of the stator tooth 601. So far, the stator assembly of the motor is assembled, and a stator sealing structure is formed. Similarly, the other stator assembly can be assembled completely according to the operation. After the stator assembly is assembled, the rotor shell 15 is connected to the stator assembly through the motor fastening screw 9; the rotor assembly and shaft 10 are fixed in position. After the rotor is assembled, finally, the other stator assembly is connected through the motor fastening screw 9. So far, the whole motor is assembled. When any part of the motor is damaged and needs to be replaced, the motor is only required to be detached in the reverse order of the assembly process. In other embodiments, the axial flux permanent magnet machine of the present invention may also include a stator assembly and a rotor assembly, without limitation.

In the axial flux permanent magnet motor, the stator core 6 can be made of silicon steel sheets or amorphous alloy which are radially laminated, wound or soft magnetic composite materials. The coil 2 is made of enameled wires or flat copper wires. The magnetic steel 14 is made of neodymium iron boron material. The cage 5 is made of a composite material. The end cap 1 is made of an aluminum alloy.

The axial flux permanent magnet motor has the advantages that the reliability of the sealing structure of the stator assembly is high, and the sealing performance is good. The whole sealing device of the stator does not occupy air gap, and the performance of the motor is not reduced or the cost is not increased. The motor adopts an oil cooling mode, so that the power density and the torque density of the motor are further improved. The rotor structure of the motor is simple and reliable, and the strength of the rotor structure is improved. When the parts of the motor need to be replaced, the motor can be replaced in time, the maintenance cost is low, and the material reutilization rate is high.

In the description of the present embodiment, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present embodiment.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present embodiment, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. An axial flux permanent magnet motor, includes wears to locate epaxial rotor assembly and stator assembly, its characterized in that, stator assembly includes:

the end cover is provided with a placement ring groove at one side;

the stator core is provided with stator teeth on one end face, and the end face, without the stator teeth, of the stator core is placed in the placement ring groove;

the stator pressing plate is sleeved at the root of the stator teeth and used for fixing the stator iron core;

the coil is sleeved on the stator teeth;

the sealing plate is sleeved at the top end of the stator tooth and used for limiting the coil and forming a sealing cavity;

the stator shell is arranged between the stator pressing plate and the sealing plate, sleeved on the outer side of the stator core, and provided with an oil inlet and an oil outlet which are arranged through the shell wall.

2. The axial flux permanent magnet motor of claim 1, wherein a first shaft hole for passing a rotating shaft is formed in the center of the end cover, a first connecting ring table and a second connecting ring table are arranged in a stepped manner at positions, close to the first shaft hole, of the placement ring groove, the first connecting ring table is sleeved on the outer side of the second connecting ring table, and the height of the second connecting ring table is larger than that of the first connecting ring table;

the first connecting ring table is used for being connected with the stator pressing plate, and the second connecting ring table is used for being connected with the sealing plate.

3. The axial flux permanent magnet machine according to claim 1 or 2, wherein the stator pressing plate is provided with a first tooth-shaped hole, the first tooth-shaped hole is arranged corresponding to the stator teeth of the stator core, and the first tooth-shaped hole is used for being sleeved on the stator teeth;

the number of the first tooth-shaped holes is the same as the number of the stator teeth.

4. An axial flux permanent magnet machine according to claim 3, wherein the stator platen is provided with a second axial hole in a central location for passage of a rotating shaft;

the stator pressing plate is provided with a first connecting through hole and a second connecting through hole, the first connecting through hole is arranged close to the second shaft hole and used for penetrating a first fastening screw used for positioning the stator pressing plate, and the first fastening screw is connected to the end cover; the second connecting through hole is arranged close to the edge of the stator pressing plate and used for penetrating the motor fastening screw.

5. The axial flux permanent magnet motor of claim 1 or 2, wherein the sealing plate is provided with a second tooth-shaped hole, the second tooth-shaped hole is arranged corresponding to the stator teeth of the stator core, and the second tooth-shaped hole is used for being sleeved on the stator teeth;

the number of the second tooth-shaped holes is the same as the number of the stator teeth.

6. The axial flux permanent magnet machine of claim 5, wherein a third shaft hole for passing the rotating shaft is provided at a center position of the sealing plate;

the sealing plate is provided with a third connecting through hole and a fourth connecting through hole, the third connecting through hole is close to the third shaft hole and is used for penetrating a second fastening screw for positioning the sealing plate, and the second fastening screw is connected to the end cover; the fourth connecting through hole is arranged close to the edge of the sealing plate and used for penetrating through a motor fastening screw.

7. The axial flux permanent magnet machine of claim 6, wherein the sealing plate is provided with a first annular sealing land and a second annular sealing land on a face proximate to the coil;

the first annular sealing platform is arranged close to the third shaft hole, the first annular sealing platform is wound on the outer side of the third connecting through hole, the inner side surface of the first annular sealing platform is arranged on the outer side of a second connecting annular platform on the end cover, and the second connecting annular platform is used for being connected with the second fastening screw;

the second annular sealing platform is arranged close to the fourth connecting through hole, the second annular sealing platform is wound on the inner side of the fourth connecting through hole, and the outer side face of the second annular sealing platform is arranged on the inner side face of the stator shell.

8. The axial flux permanent magnet machine of claim 1, wherein the rotor assembly comprises:

the magnetic steel holding device comprises a holding frame, wherein a plurality of magnetic steel holding grooves are formed in the holding frame, and the magnetic steel holding grooves are uniformly distributed around the axis of the holding frame;

the magnetic steels are placed in the magnetic steel placing grooves, and the number and the shape of the magnetic steels are the same as those of the magnetic steel placing grooves;

and the rotor shell is sleeved on the outer side of the retainer and is connected with the stator assembly.

9. The axial flux permanent magnet machine of claim 8, wherein the cage comprises a first sub-cage and a second sub-cage spliced together, the first sub-cage and the second sub-cage being identical in construction;

the first sub-retainer and the second sub-retainer are fixedly connected, and the magnetic steel is adhered in the magnetic steel placing grooves of the first sub-retainer and the second sub-retainer.

10. The axial flux permanent magnet machine of claim 8, wherein the rotor assembly and stator assembly are fixedly connected by a machine fastening screw;

the rotor shell is provided with a plurality of fifth connecting through holes, the fifth connecting through holes are threaded holes, and the motor fastening screw penetrates through the through holes in the stator assembly to be connected in the fifth connecting through holes.