Patent Description:
The present application relates to the technical field of axial magnetic field motors.

Automobile driving motors in the conventional art have complex operating conditions. Due to the structural characteristics of the motor itself, various losses are generated during the operation of the motor, which causes the motor to generate heat. In order to improve the working efficiency of the motor, it is necessary to design a cooling system for the motor. The cooling system is mainly divided into two types, one is air cooling, and the other is liquid cooling. Compared with air cooling, liquid cooling is more efficient. The existing liquid cooling system mainly adopts an external cooling method, that is, the coolant is in indirect contact with core components to be cooled, and the cooling efficiency is low, which adversely affects the service life of the motor. Prior art document <CIT> discloses a motor assembly with an integrated cooling system provided in which a coolant is injected into a hollow region of the rotor shaft. The coolant is expelled out of the rotor shaft and into the motor enclosure via multiple thru-holes, thereby allowing efficient cooling of both the stator and the rotor assemblies. Prior art document <CIT> discloses an electric motor which efficiently and uniformly cools stator cores and exciting coils. The electric motor disclosed therein includes: a rotor; a rotor support member; a stator; a coolant supply part; and a coolant discharge part. The stator includes: multiple stator cores; stator core support members; multiple exciting coils; and a passage formation member which forms a passage for cooling the stator cores and the exciting coils. The passage formation member forms inner passages and outer passages, which are respectively located at the radial inner side and the radial outer side of the respective exciting coils, and cooling passages which are respectively formed along outer peripheral surfaces of the exciting coils and allow the inner passages and the outer passages to communicate with each other. The coolant supply part supplies a coolant to one of the passages, and the coolant discharge pipeline discharges the coolant from the other of the passages.

In view of this, a technical problem to be addressed by the present application is to improve the cooling efficiency of a motor and prolong the service life of the motor. Therefore, an axial magnetic field motor is provided according to the present application.

In order to achieve the above objects, the claimed solution is specified by the subject-matter according to claim <NUM>, and dependent claims specify embodiments thereof.

It can be seen from the above technical solutions that, when adopting the cooling system of the present application, liquid enters the liquid spraying cavity from the liquid inlet, and the liquid is sprayed to the stator iron core located in the enclosed chamber through the liquid spraying hole. After the liquid sprayed from the liquid spraying hole exchanges heat with the stator iron core, it flows out from the liquid outlet. Compared with the conventional art, the circulating liquid directly contacts the stator iron core to exchange heat, thereby improving the cooling efficiency of the motor and prolonging the service life of the motor.

In order to illustrate technical solutions in the embodiments of the present application or in the conventional technology more clearly, drawings used in the description of the embodiments or the conventional technology are introduced briefly hereinafter.

<FIG> is a schematic exploded view showing the structure of a cooling system provided by a first embodiment of the present application;
<FIG> is a schematic perspective view showing the structure of the cooling system provided by the first embodiment of the present application;
<FIG> is a schematic diagram of a principle of the cooling system provided by the first embodiment of the present application;
<FIG> is a schematic diagram of a principle of another cooling system provided by the first embodiment of the present application;
Reference numerals in the figures,.

<FIG> is a schematic exploded view showing the structure of a cooling system provided by a second embodiment of the present application;
<FIG> is a schematic perspective view showing the structure of the cooling system provided by the second embodiment of the present application;
<FIG> is a schematic diagram of a principle of the cooling system provided by the second embodiment of the present application;
<FIG> is a schematic diagram of a principle of another cooling system provided by the second embodiment of the present application;
Reference numerals in the figures,.

<FIG> is a schematic perspective view showing the structure of a stator component provided by a first mode not falling under the present invention ("mode <NUM> " in the following);
<FIG> is a schematic sectional view showing the structure of the stator component provided by mode <NUM>;
<FIG> is a schematic perspective view of a cross section of the stator component provided by mode <NUM>;
<FIG> is a schematic perspective view showing the structure of a stator iron core provided by mode <NUM>;
<FIG> is a schematic perspective view showing the structure of another stator iron core provided by mode <NUM>;
<FIG> is a schematic exploded view showing the structure of the stator component provided by mode <NUM>;
Reference numerals in the figures,.

<FIG> is a schematic sectional view showing the structure of a cooling system provided by a second mode not falling under the present invention ("mode <NUM>");
<FIG> is a schematic perspective view showing the structure of another cooling system provided by mode <NUM>;
<FIG> is a schematic exploded view showing the structure of a stator component provided by mode <NUM>;
<FIG> is a schematic perspective view showing the structure of the stator component provided by mode <NUM>;
<FIG> is a schematic perspective view showing the structure of the stator component provided by mode <NUM>;
<FIG> is a schematic perspective view showing the structure of a sealing cover plate provided by mode <NUM>;
Reference numerals in the figures,.

<FIG> is a schematic exploded view showing the structure of a stator component provided by a third mode not belonging to the present invention ("mode <NUM>");
<FIG> is a schematic perspective view showing the structure of the stator component provided by mode <NUM>;
<FIG> is a schematic structural view of a stator cover plate provided by mode <NUM>;
<FIG> is a schematic perspective view showing the structure of a stator iron core provided by mode <NUM>;
<FIG> is a schematic diagram of a cooling principle of the stator iron core provided by mode <NUM>;
<FIG> is a schematic perspective view showing the structure of a housing provided by mode <NUM>;
Reference numerals in the figures,.

A core of the present application is to provide a cooling system and an axial magnetic field motor to improve the cooling efficiency of the motor and prolong the service life of the motor.

Referring to <FIG>, a cooling system in the embodiment of the present application is used for cooling a stator iron core 200a. The cooling system includes: a housing 100a; an enclosed chamber for containing the stator iron core 200a; a liquid spraying cavity 500a for containing liquid, which is provided on the housing 100a; a liquid inlet 300a communicating with the liquid spraying cavity 500a; a liquid outlet 400a communicating with the enclosed chamber; and a liquid spraying component 600a provided on an inner wall of the housing 100a, which corresponds to the stator iron core 200a.

When adopting the cooling system of the present application, liquid enters the liquid spraying cavity 500a from the liquid inlet 300a, and the liquid is sprayed to the stator iron core 200a located in the enclosed chamber through the liquid spraying component 600a. After the liquid sprayed from the liquid spraying component 600a exchanges heat with the stator iron core 200a, it flows out from the liquid outlet 400a. Compared with the conventional art, the circulating liquid directly contacts the stator iron core 200a to exchange heat, thereby improving the cooling efficiency of the motor and prolonging the service life of the motor.

It should be noted that the housing 100a is configured to contain the stator iron core 200a, and an enclosed chamber is formed inside. When the stator iron core 200a is installed in the enclosed chamber, liquid sprayed by the liquid spraying component 600a may circulate through a gap of the coil of the stator iron core 200a, and finally flow out from the liquid outlet 400a, thereby forming a kind of cooling circulation circuit.

The liquid spraying cavity 500a is provided in a housing wall of the housing 100a, that is, a section where the liquid spraying cavity 500a is provided is a hollow structure. The liquid spraying cavity 500a can be adjusted according to a section where the liquid spraying component 600a is provided. For example, the housing 100a may surround a peripheral surface section of the stator iron core 200a, or an end surface section of the housing 100a may surround a peripheral surface section of the stator iron core 200a. The installation positions of the liquid inlet 300a and the liquid outlet 400a are further determined according to an installation position of the liquid spraying cavity 500a.

The housing 100a may have any shape, as long as it is capable of accommodating the liquid spraying cavity 500a and the liquid spraying component 600a, it is within the protection scope of the present application. In an embodiment of the present application, the housing 100a includes:.

It can be seen that in the embodiment of the present application, an entirety the housing 100a is divided into four sections, and the housing 100a may also be divided into three sections according to specific requirements. For example, the upper cover plate 102a and the stator casing 101a are treated as a one-piece structure, and the lower cover plate 103a and the stator casing 101a are treated as a one-piece structure. Alternatively, one part of the stator casing 101a and the upper cover plate 102a are treated as a one-piece structure, and the other part of the stator casing 101a and the lower cover plate 103a are treated as a one-piece structure, etc..

In order to further improve the cooling efficiency, in another embodiment of the present application, a first spoiler 700a is provided on an inner wall of the stator casing 101a. An area of the enclosed chamber, which is close to the liquid outlet 400a, is separated as a liquid return area by the first spoiler 700a, and an area close to the liquid spraying component 600a is separated as a liquid spraying area.

Under the action of the first spoiler 700a, the enclosed chamber is divided into the liquid return area and the liquid spraying area. The liquid spraying component 600a sprays liquid in the liquid spraying area. After the sprayed liquid exchanges heat with the stator iron core 200a, it is collected in the liquid return area and flows out through the liquid outlet 400a. Therefore, under the action of the first spoiler 700a, the liquid sprayed by the liquid spraying component 600a can flow uniformly from the outside of the stator iron core 200a to the inside, so that the stator iron core 200a can be uniformly cooled.

The number of the first spoiler 700a may be one or more, as long as the structure is capable of blocking the liquid flow, it is within the protection scope of the present application. In the figure, the number of the first spoiler 700a is two, which are respectively located on two sides of the liquid outlet 400a. As a result, an area between the two first spoilers 700a which is close to the liquid outlet 400a, is formed as the liquid return area, and an area between the two first spoilers 700a which is away from the liquid outlet 400a, is formed as a liquid spraying area. The liquid spraying components 600a are all provided on an inner wall of the stator casing 101a in the liquid spraying area.

Further, a second spoiler 800a is provided at a section close to the liquid outlet 400a, of the intermediate shaft sleeve 104a. A function of the second spoiler 800a is to cause the liquid located inside the stator iron core 200a to evenly flow from the inside of the stator iron core 200a to the liquid return area, so as to improve the cooling efficiency.

According to the structure of the housing, a liquid spraying cavity 500a may be provided on the stator casing 101a, the upper cover plate 102a or the lower cover plate 103a, and accordingly, the liquid inlet 300a and the liquid outlet 400a may be arranged on the stator casing 101a, the upper cover plate 102a or the lower cover plate 103a. In the embodiment of the present application, the liquid spraying cavity 500a is arranged on the stator casing 101a, and the liquid inlet 300a and/or the liquid outlet 400a are arranged on the stator casing 101a.

The liquid spraying cavity 500a includes one or two liquid inlets 300a. In a case that there is one liquid inlet 300a, the liquid inlet is arranged at one end of the liquid spraying cavity 500a, as shown in <FIG>; in a case that there are two liquid inlets 300a, the two liquid inlets 300a are arranged at two ends of the liquid spraying cavity 500a, as shown in <FIG>.

Two liquid inlets 300a are provided, which are respectively located at two ends of the liquid spraying cavity 500a, and an external port of the liquid inlet 300a has one outlet. Or, there is one liquid inlet 300a located at one end of the liquid spraying cavity 500a, and a corresponding external port of the liquid inlet 300a has one outlet.

In a case that the liquid spraying cavity 500a is provided on the stator casing 101a, the liquid spraying cavity 500a may have a ring-shaped structure that surrounds the entire stator casing 101a or a part of the stator casing 101a. In order to simplify the processing technology, the liquid inlet 300a and the liquid outlet 400a are collectively provided on an external port 1011a of the first housing 100a. Apparently, the external ports 1011a of the liquid inlet 300a and the liquid outlet 400a may be separately provided as needed.

Further, in a case that two liquid inlets 300a are provided and the two liquid inlets 300a are located at the two ends of the liquid spraying cavity 500a, in order to avoid the formation of turbulent flow of the liquid located in the middle, a partition plate is provided in the middle of the liquid spraying cavity 500a.

It should be noted that the stator casing 101a is a one-piece structure or a split-type structure. The so-called one-piece structure means that when the stator casing 101a is processed, the structure of the liquid spraying cavity 500a is processed together, for example, in a casting process. In a case that the stator casing 101a has a split-type structure, the stator casing 101a includes: a stator base housing with a hollow structure and a sealing ring for sealing the hollow structure. The sealing ring and the stator base housing jointly define the liquid spraying cavity 500a.

A function of the liquid spraying component 600a is to cool the stator iron core 200a through spraying. In the embodiment of the present application, the liquid spraying component is a nozzle. The liquid sprayed into the liquid spraying cavity 500a has a certain pressure. Under the action of pressure, after the action of the liquid spraying component 600a, the sprayed liquid is a fine liquid, thereby increasing the contact area between the liquid and the stator iron core 200a. The number of the liquid spraying component 600a is one or more, and multiple liquid spraying components 600a are capable of further increasing a spray area of the liquid spraying component 600a. Further, each liquid spraying component 600a corresponds to a coil gap of the stator iron core 200a, and each coil gap corresponds to a liquid spraying component. The liquid sprayed by the liquid spraying component can directly contact a heat source, and the cooling effect is better. The liquid can be divided evenly under the action of the first spoiler 700a and the second spoiler 800a, and the cooling is more uniform, which desirably reduces the temperature of the stator iron core 200a.

The present application further discloses a motor, which includes a stator iron core 200a and a cooling system, where the cooling system is the cooling system according to any one of the above aspects. Since the above cooling system has the above effects, the motor including the above cooling system also has corresponding effects, which is not repeated here.

Referring to <FIG>, a cooling system in the embodiment of the present application is used for cooling a stator iron core 200b. The cooling system includes: a housing 100b; an enclosed chamber for containing the stator iron core 200b; a liquid spraying cavity 500b for containing liquid, which is provided on the housing 100b; a liquid inlet 300b communicating with the liquid spraying cavity 500b; a liquid outlet 400b communicating with the enclosed chamber; and a liquid spraying hole 600b provided on an inner wall of the housing 100b, which corresponds to the stator iron core 200b.

When adopting the cooling system of the present application, liquid enters the liquid spraying cavity 500b from the liquid inlet 300b, and the liquid is sprayed to the stator iron core 200b located in the enclosed chamber through the liquid spraying hole 600b. After the liquid sprayed from the liquid spraying hole 600b exchanges heat with the stator iron core 200b, it flows out from the liquid outlet 400b. Compared with the conventional art, the circulating liquid directly contacts the stator iron core 200b to exchange heat, thereby improving the cooling efficiency of the motor and prolonging the service life of the motor.

It should be noted that the housing 100b is configured to contain the stator iron core 200b, and an enclosed chamber is formed inside. When the stator iron core 200b is installed in the enclosed chamber, liquid sprayed by the liquid spraying hole 600b may circulate through a gap of the coil of the stator iron core 200b, and finally flow out from the liquid outlet 400b, thereby forming a kind of cooling circulation circuit.

The liquid spraying cavity 500b is provided in a housing wall of the housing 100b, that is, a section where the liquid spraying cavity 500b is provided is a hollow structure. The liquid spraying cavity 500b can be adjusted according to a section where the liquid spraying hole 600b is provided. For example, the housing 100b may surround a peripheral surface section of the stator iron core 200b, or an end surface section of the housing 100b may surround a peripheral surface section of the stator iron core 200b. The installation positions of the liquid inlet 300b and the liquid outlet 400b are further determined according to an installation position of the liquid spraying cavity 500b.

The housing 100b may have any shape, as long as it is capable of accommodating the liquid spraying cavity 500b and the liquid spraying component 600b, it is within the protection scope of the present application. In an embodiment of the present application, the housing 100b includes:.

It can be seen that in the embodiment of the present application, an entirety the housing 100b is divided into four sections, and the housing 100b may also be divided into three sections according to specific requirements. For example, the upper cover plate 102b and the stator casing 101b are treated as a one-piece structure, and the lower cover plate 103b and the stator casing 101b are treated as a one-piece structure. Alternatively, one part of the stator casing 101b and the upper cover plate 102b are treated as a one-piece structure, and the other part of the stator casing 101b and the lower cover plate 103b are treated as a one-piece structure, etc..

In order to further improve the cooling efficiency, in another embodiment of the present application, a first spoiler 700b is provided on an inner wall of the stator casing 101b. An area of the enclosed chamber, which is close to the liquid outlet 400b, is separated as a liquid return area by the first spoiler 700b, and an area close to the liquid spraying hole 600b is separated as a liquid spraying area.

Under the action of the first spoiler 700b, the enclosed chamber is divided into the liquid return area and the liquid spraying area. The liquid spraying hole 600b sprays liquid in the liquid spraying area. After the sprayed liquid exchanges heat with the stator iron core 200b, it is collected in the liquid return area and flows out through the liquid outlet 400b. Therefore, under the action of the first spoiler 700b, the liquid sprayed by the liquid spraying hole 600b can flow uniformly from the outside of the stator iron core 200b to the inside, so that the stator iron core 200b can be uniformly cooled.

The number of the first spoiler 700b may be one or more, as long as the structure is capable of blocking the liquid flow, it is within the protection scope of the present application. In the figure, the number of the first spoiler 700b is two, which are respectively located on two sides of the liquid outlet 400b. As a result, an area between the two first spoilers 700b which is close to the liquid outlet 400b, is formed as the liquid return area, and an area between the two first spoilers 700b which is away from the liquid outlet 400b, is formed as a liquid spraying area. The liquid spraying holes 600b are all provided on an inner wall of the stator casing 101b in the liquid spraying area.

Further, a second spoiler is provided at a section close to the liquid outlet 400b, of the intermediate shaft sleeve 104b. A function of the second spoiler is to cause the liquid located inside the stator iron core 200b to evenly flow from the inside of the stator iron core 200b to the liquid return area, so as to improve the cooling efficiency.

According to the structure of the housing, a liquid spraying cavity 500b may be provided on the stator casing 101b, the upper cover plate 102b or the lower cover plate 103b, and accordingly, the liquid inlet 300b and the liquid outlet 400b may be arranged on the stator casing 101b, the upper cover plate 102b or the lower cover plate 103b. In the embodiment of the present application, the liquid spraying cavity 500b is arranged on the stator casing 101b, and the liquid inlet 300b and/or the liquid outlet 400b are arranged on the stator casing 101b.

The liquid spraying cavity 500b includes one or two liquid inlets 300b. In a case that there is one liquid inlet 300b, the liquid inlet is arranged at one end of the liquid spraying cavity 500b, as shown in <FIG>; in a case that there are two liquid inlets 300b, the two liquid inlets 300b are arranged at two ends of the liquid spraying cavity 500b, as shown in <FIG>.

Two liquid inlets 300b are provided, which are respectively located at two ends of the liquid spraying cavity 500b, and an external port of the liquid inlet 300b has one outlet. Or, there is one liquid inlet 300b located at one end of the liquid spraying cavity 500b, and a corresponding external port of the liquid inlet 300b has one outlet.

In a case that the liquid spraying cavity 500b is provided on the stator casing 101b, the liquid spraying cavity 500b may have a ring-shaped structure that surrounds the entire stator casing 101b or a part of the stator casing 101b. In order to simplify the processing technology, the liquid inlet 300b and the liquid outlet 1014b are collectively provided on an external port 1011b of the first housing 100b. Apparently, the external ports 1011b of the liquid inlet 300b and the liquid outlet 1014b may be separately provided as needed.

Further, in a case that two liquid inlets 300b are provided and the two liquid inlets 300b are located at the two ends of the liquid spraying cavity 500ba, in order to avoid the formation of turbulent flow of the liquid located in the middle, a partition plate is provided in the middle of the liquid spraying cavity 500b.

It should be noted that the stator casing 101b is a one-piece structure or a split-type structure. The so-called one-piece structure means that when the stator casing 101b is processed, the structure of the liquid spraying cavity 500b is processed together, for example, in a casting process. In a case that the stator casing 101b has a split-type structure, the stator casing 101b includes: a stator base housing with a hollow structure and a sealing ring for sealing the hollow structure. The sealing ring and the stator base housing jointly define the liquid spraying cavity 500b.

A function of the liquid spraying hole 600b is to cool the stator iron core 200b through spraying. In the embodiment of the present application, the liquid spraying component is a nozzle. The liquid sprayed into the liquid spraying cavity 500b has a certain pressure. Under the action of pressure, after the action of the liquid spraying hole 600b, the sprayed liquid is a fine liquid, thereby increasing the contact area between the liquid and the stator iron core 200b. The number of the liquid spraying hole 600b is one or more, and multiple liquid spraying holes 600b are capable of further increasing a spray area of the liquid spraying hole 600b. Further, each liquid spraying hole 600a corresponds to a coil gap of the stator iron core 200b, and each coil gap corresponds to a liquid spraying hole. The liquid sprayed by the liquid spraying hole can directly contact a heat source, and the cooling effect is better. The liquid can be divided evenly under the action of the first spoiler 700b and the second spoiler, and the cooling is more uniform, which desirably reduces the temperature of the stator iron core 200b.

The present application further discloses a motor, which includes a stator iron core 200b and a cooling system, where the cooling system is the cooling system according to any one of the above aspects. Since the above cooling system has the above effects, the motor including the above cooling system also has corresponding effects, which is not repeated here.

A core is to provide a stator component and an axial magnetic field motor to improve the cooling efficiency of the motor and prolong the service life of the motor.

Referring to <FIG>, a stator component in mode <NUM> includes a housing 100c, and a stator iron core 200c provided inside the housing 100c; where the stator iron core 200c and the housing 100c define a first cooling space 300c, and a middle portion of the stator iron core 200c defines a second cooling space 400c;.

When adopting the stator component, cooling liquid enters the liquid inlet cavity 101c from the liquid inlet 105c, and enters the first cooling space 300c through the first intermediate liquid port 103c. Then, the cooling liquid enters the second cooling space 400c through the cooling passage 201c, and then it enters the first cooling space 300c through the cooling passage 201c, and then enters the liquid outlet cavity 102c through the second intermediate liquid port 104c, and finally flows out from the liquid outlet 106c. The cooling liquid is capable of directly contacting the stator iron core 200c for heat exchange during the process that the cooling liquid flows through the first cooling space 300c, the cooling passage 201c, and the second cooling space 400c, thereby improving the cooling efficiency of the motor and prolonging the service life of the motor.

In order to prevent liquid leakage, the stator iron core 200c is enclosed, by a stator pressing plate 600c, in a space defined by the housing 100c and the stator pressing plate 600c.

In order to increase the cooling effect, a spoiler 500c for separating the first cooling space 300c is further provided between the housing 100c and the stator iron core 200c. By providing the spoiler 500c, cooling liquid entering the first cooling space 300c flows according to a predetermined trajectory, so as to prolong the contact time of the cooling liquid with the stator iron core 200c. Further, the spoiler 500c is provided so that the cooling liquid can flow through most of the cooling passages 201c on the stator iron core 200c, so that the temperature on the stator iron core 200c is more uniform.

Among them, the number of the spoiler 500c is two, and the two spoilers 500c are arranged symmetrically. The two spoilers 500c separate the first cooling space 300c into two areas, which are respectively a first cooling area 301c and a second cooling area 302c, where the first cooling area 301c corresponds to the liquid inlet cavity 101c, and the second cooling area 302c corresponds to the liquid outlet cavity 102c. During a cooling process of cooling liquid, the cooling liquid in the liquid inlet cavity 101c enters the first cooling area 301c through the first intermediate liquid port 103c, and the cooling liquid in the first cooling area 301c enters the second cooling space 400c through the cooling passage 201c corresponding to the first cooling area 301c. The cooling liquid in the second cooling space enters the second cooling area 302c through the cooling passage 201c corresponding to the second cooling area 302c, and the cooling liquid in the second cooling area 302c enters the liquid outlet cavity 102c through the second intermediate liquid port 104c.

It should be noted that, the stator component includes one or more housings 100c. In a case that there are multiple housings 100c, each housing 100c is correspondingly installed with one stator iron core 200c. All the multiple housings 100c may be two housings 100c, three housings 100c, four housings 100c, and etc. The number of housing 100c may be determined according to the output power level.

The multiple housings 100c are arranged coaxially, that is, an end face of one housing 100c abuts against an end face of an adjacent housing 100c.

Among the two housings 100c, the liquid outlet 106c of one housing 100c is in communication with the liquid inlet 105c of the other housing 100c. The communication may be made through an external pipeline, or the liquid inlet 105c of one housing 100c and the liquid outlet 106c of the other housing 100c are coaxially arranged. That is, the liquid outlet 106c and the liquid inlet 105c are both arranged on the end surface, and when the two housings 100c are butted with each other, the liquid outlet 106c and the liquid inlet 105c are communicated.

Two housings 100c are provided by way of example, where the liquid outlet 106c of one housing 100c is arranged on an end face, and the liquid inlet 105c of the other housing 100c is arranged on the end face, and when the two housings 100c are butted with each other, the liquid outlet 106c of the front housing 100c is in communication with the liquid inlet 105c of the rear housing 100c.

Among the multiple housings 100c, each of the liquid inlet 105c of a housing 100c at one end and the liquid outlet 106c of the housing 100c at the other end may be located on an end surface of a corresponding housing 100c, or may be located at a circumferential surface of the corresponding housing 100c. Preferably, in order to facilitate the installation of rear parts, in the embodiment of the present application, the liquid inlet 105c of the housing 100c at one end and the liquid outlet 106c of the housing 100c at the other end may both be located on a circumferential surface of a corresponding housing 100c. Further, the liquid inlet 105c of the housing 100c at one end and the liquid outlet 106c of the housing 100c at the other end are both arranged on the same side.

A function of the cooling passage 201c is a path to communicate the first cooling space 300c with the second cooling space 400c. Moreover, cooling liquid in the cooling passage 201c directly contacts the stator iron core 200c, and directly takes heat generated by the stator iron core 200c away. Where, the cooling passage 201c is a through hole penetrating through the stator iron core 200c, and a cross section of the through hole is circular, elliptical, rectangular, etc. Alternatively, the cooling passage 201c is encircled by a groove provided on an end surface of the stator iron core 200c and the housing 100c. It can be understood that, a groove is provided on an end surface of the stator iron core 200c, and a corresponding housing 100c is a planar structure; the cooling passage 201c is encircled by the groove and the surface of the corresponding housing 100c; or the stator iron core 200c is provided with a groove, a surface of a corresponding housing 100c is provided with a groove, and the two grooves are butted to form the cooling passage 201c.

Alternatively, the number of housing 100c is two, which are respectively a front housing <NUM>-1c and a rear housing <NUM>-2c; the number of stator iron core 200c is two, which are respectively a front stator iron core <NUM>-1c and a rear stator iron core <NUM>-2c. Reference is made to the above for the structure of the front housing <NUM>-1c and the rear housing <NUM>-2c.

In order to prevent liquid leakage, the front stator iron core <NUM>-1c is enclosed, by a front stator pressing plate <NUM>-1c, in a space defined by the front housing <NUM>-1c and the front stator pressing plate <NUM>-1c.

A front spoiler <NUM>-1c is provided between the front housing <NUM>-1c and the front stator iron core <NUM>-1c.

In order to prevent liquid leakage, the rear stator iron core <NUM>-2c is enclosed, by a rear stator pressing plate <NUM>-2c, in a space defined by the rear housing <NUM>-2c and the rear stator pressing plate <NUM>-2c.

A rear spoiler <NUM>-2c is provided between the rear housing <NUM>-2c and the rear stator iron core <NUM>-2c.

A core is to provide a cooling system, a stator component and an axial magnetic field motor to improve the cooling efficiency of the motor and prolong the service life of the motor.

Referring to <FIG>, a cooling system in mode <NUM> includes a housing 101d, which has an installation position 102d at the bottom for installing a stator iron core 200d; The cooling system 100d further includes:.

When adopting the stator component, cooling oil enters the oil inlet cavity 103d from the oil inlet 105d, and enters the inside of the housing 101d through the oil spraying hole 107d. The cooling oil entering the inside of the housing 101d is capable of directly contacting the stator iron core 200d provided inside the housing 101d, and after the contact heat exchange, the cooling oil enters the oil return cavity 104d through the oil return hole 108d, and finally flows out from the oil outlet 106d. Since the cooling liquid is capable of directly contacting the stator iron core 200d for heat exchange, the cooling efficiency of the motor is thereby improved, and the service life of the motor is prolonged.

The cooling system 100d includes one or more housings 101d. In a case that there are multiple housings 101d, the multiple housings 101d may be two housings 101d, three housings 101d, four housings 101d, and etc. The number of housing 101d may be determined according to the output power level.

The multiple housings 101d are arranged coaxially, that is, an end face of one housing 101d abuts against an end face of an adjacent housing 100d.

Among two adjacent housings 101d, the oil outlet 106d of the front housing 101d is in communication with the oil inlet 105d of the rear housing 101d. The communication may be made through multiple ways, specifically, may be made through an external pipeline. Alternatively, the oil inlet 105d of the front housing 101d and the oil outlet 106d of the rear housing 101d are coaxially arranged. That is, the liquid outlet 106d and the liquid inlet 105d are both arranged on the end surface, and when the two housings 101d are butted with each other, the liquid outlet 106d and the liquid inlet 105d are communicated.

Two housings 101d are provided by way of example, where the oil outlet 106d of one housing 101d is arranged on an end face, and the oil inlet 105d of the other housing 101d is arranged on the end face, and when the two housings 101d are butted with each other, the oil outlet 106d of the front housing 101d is in communication with the oil inlet 105d of the rear housing 101d.

Among the multiple housings 101d, each of the oil inlet 105d of the housing 101d at one end and the oil outlet 106d of the housing 101d at the other end may be located on an end surface of a corresponding housing 101d, or may be located at a circumferential surface of the corresponding housing 101d. Preferably, in order to facilitate the installation of rear parts, the oil inlet 105d of the housing 101d at one end and the oil outlet 106d of the housing 101d at the other end may both be located on a circumferential surface of a corresponding housing 101d. Further, the oil inlet 105d of the housing 101d at one end and the oil outlet 106d of the housing 101d at the other end are both arranged on the same side.

A stator component is further disclosed, including a stator iron core 200d and the cooling system 100d of any one of the above aspects, where the stator iron core 200d is arranged on the installation position 102d of the housing 101d of the cooling system 100d, where an outer ring of the stator iron core 200d and the housing 101d define a first cooling space 400d, and an inner ring of the stator iron core 200d and the housing 101d define a second cooling space 500d.

In order to increase the cooling effect, spoiler 201d for separating the first cooling space 400d is further provided between the housing 101d and the stator iron core 200d. By providing the spoiler 201d, cooling oil entering the first cooling space 400d flows according to a predetermined trajectory, so as to prolong the contact time of the cooling oil with the stator iron core 200d. Further, the spoiler 201d is provided so that the cooling oil can flow through most of the cooling passages 109d, so that the temperature on the stator iron core 200d is more uniform.

Among them, the number of the spoiler 201d is two, and the two spoilers 201d are arranged symmetrically. The two spoilers 201d separate the first cooling space 400d into two areas, which are respectively a first cooling area and a second cooling area, where the first cooling area corresponds to the oil inlet cavity 103d, and the second cooling area corresponds to the oil outlet cavity 104d. During a cooling process of the cooling oil, the cooling oil in the oil inlet cavity 103d enters the first cooling area through the oil spraying hole 103d, and the cooling oil in the first cooling area enters the second cooling space 500d through the oil diverting groove 109d corresponding to the first cooling area. The cooling oil in the second cooling space enters the second cooling area through the oil diverting groove 109d corresponding to the second cooling area, and the cooling oil in the second cooling area enters the oil return cavity 104d through the oil return hole 108d.

The number of the oil diverting groove 109d is plural, and the number of the oil diverting grooves 109d is the same as the number of teeth of the stator iron core 200d, or may be different. The number of the oil diverting grooves 109d is the same as the number of teeth of the stator iron core 200d.

Further, the oil diverting groove 109d corresponds to a coil gap of the stator iron core 200d. Since the coil is the main heat-generating component in the stator iron core 200d, when the oil diverting groove 109d corresponds the coil gap of the stator iron core 200d, cooling oil entering the oil diverting groove 109d is capable of fully contacting a tooth groove of the stator iron core 200d, so that the cooling effect can be further improved.

In order to prevent liquid leakage, the stator iron core 200d is enclosed, by a sealing cover plate 300d, in a space defined by the housing 101d and the sealing cover plate 300d. Where, the sealing cover plate 300d is fixed on the housing 101d by screws, other ways such as welding, riveting, or dovetailing may also be used. One end of the sealing cover plate 300d close to the stator iron core 200d is further provided with a clamping slot 301d for clamping the stator iron core.

Referring to <FIG>, the stator component includes:.

The stator iron core 300e has an open slot 302e, which facilitates the installation of the coil 400e. Besides, the pole shoe 500e is fixed on the stator cover plate 200e. When the stator cover plate 200e is butted with the housing 100e, the pole shoe 500e corresponding to the notch of the open slot 302e is capable of reducing the tooth harmonics of the motor, reducing the iron loss of the motor, improving the efficiency of the motor, which may further reduce the torque ripple of the motor. Since the pole shoe 500e is carried on the stator cover plate 200e, when the stator cover plate 200e is directly butted with the housing 100e during installation, the pole shoe 500e can be matched with the open slot 302e, thereby improving the production efficiency of the motor.

When adopting the stator component, cooling oil enters the oil inlet cavity 101e from the oil inlet 103e, and enters the inside of the housing 100e through the oil spraying hole 105e. The cooling oil entering the inside of the housing 100e is capable of directly contacting the stator iron core 300e provided inside the housing 100e, and after the contact heat exchange, the cooling oil enters the oil return cavity 102e through the oil return hole 106e, and finally flows out from the oil outlet 104e. Since the cooling liquid is capable of directly contacting the stator iron core 300e for heat exchange, the cooling efficiency of the motor is thereby improved, and the service life of the motor is prolonged.

It should be noted that the stator cover plate 200e is fixed on the housing 100e by screws or pressing plate, other ways such as welding, riveting, or dovetailing may also be used. Correspondingly, the stator cover plate 200e and the housing 100e are provided with mounting holes for mounting screws, a station for setting the pressing plate, riveting holes, and a dovetail structure to realize the fixation of the stator cover plate 200e with the housing 100e.

The stator iron core 300e has an open slot 302e and teeth 301e. The open slot 302e is configured to install the coil 400e. There is one open slot 302e between each tooth. By providing the open slot 302e, the installation of the coil 400e may be facilitated, where the coil 400e is a formed coil or is wound on the teeth in sequence. The formed coil is a rectangular copper wire formed coil, or a round copper wire pre-wound formed coil.

The stator cover plate 200e is generally made of non-magnetic conductive high-strength glass fiber composite material or high-strength plastic (such as PPS, PEEK, etc.). An end surface, close to the stator iron core 300e, of the stator cover plate 200e is provided with a groove rib 201e extending in a radial direction of the stator cover plate 200e and an iron core tooth groove 202e corresponding to the stator iron core 300e. The position alignment of the stator cover plate 200e with the housing 100e may be facilitated by providing the groove rib 201e and the iron core tooth groove 202e. The number of groove rib 201e is the same as or different from the number of open slot 302e. The number of groove rib 201e is equal to the number of open slot 302e of the stator iron core 300e, which can facilitate the position alignment of the stator cover plate 200e with the housing 100e. One pole shoe 500e is provided on two sides of each groove rib 201e, that is, the pole shoe 500e is pasted on two sides of the groove rib 201e, and the remaining iron core tooth groove 202e is fitted to tooth surfaces of the whole iron core. A thickness of the cover plate at a tooth groove section of the iron core tooth needs to be as thin as possible to reduce an air gap between the stator and a rotor.

Each stator component has one housing. Multiple stator components may be coaxially arranged, and multiple housings 100e are arranged coaxially, that is, an end face of one housing 100e abuts against an end face of an adjacent housing 100d.

Among two adjacent housings 100e, the oil outlet 104e of the front housing 100e is in communication with the oil inlet 103e of the rear housing 100e. The communication may be made through multiple ways, specifically, may be made through an external pipeline. Alternatively, the oil inlet 103e of the front housing 100e and the oil outlet 104e of the rear housing 100e are coaxially arranged. That is, the liquid outlet 104e and the liquid inlet 103e are both arranged on the end surface, and when the two housings 100e are butted with each other, the liquid outlet 104e and the liquid inlet 103e are communicated.

Two housings 100e are provided by way of example, where the oil outlet 104e of one housing 100e is arranged on an end face, and the oil inlet 103e of the other housing 100e is arranged on the end face, and when the two housings 100e are butted with each other, the oil outlet 104e of the front housing 100e is in communication with the oil inlet 103e of the rear housing 100e.

Among the multiple housings 100e, each of the oil inlet 103e of the housing 100e at one end and the oil outlet 104e of the housing 100e at the other end may be located on an end surface of a corresponding housing 100e, or may be located at a circumferential surface of the corresponding housing 100e. Preferably, in order to facilitate the installation of rear parts, the oil inlet 103e of the housing 100e at one end and the oil outlet 104e of the housing 100e at the other end may both be located on a circumferential surface of a corresponding housing 100e. Further, the oil inlet 103e of the housing 100e at one end and the oil outlet 104e of the housing 100e at the other end are both arranged on the same side.

The pole shoe 500e extends along a length direction of the stator cover plate 200e. In a radial direction of the stator cover plate 200e, the length of the pole shoe 500e is the same as the length of the notch of the open slot 302e.

A sum of widths of the groove rib 201e and the pole shoe 500e located on the two sides of the groove rib 201e equals to a width of the notch of the open slot 302e.

The pole shoe 500e is molded from SMC ferromagnetic powder or other magnetic conductive powder (e.g., ferrite powder), and has a rectangular shape.

Claim 1:
An axial magnetic field motor, comprising a stator iron core (200a, 200b, 200c, 200d, 300e) and a cooling system for cooling the stator iron core (200a, 200b, 200c, 200d, 300e) , wherein said cooling system comprises a housing (100a, 100b, 100c, 101d, 100e) and an enclosed chamber for containing the stator iron core (200a, 200b, 200c, 200d, 300e), wherein the housing (100a, 100b, 100c, 101d, 100e) comprises:
a stator casing (101a, 101b) surrounding a circumferential surface of the stator iron core (200a, 200b, 200c, 200d, 300e);
an upper cover plate (102a, 102b) and a lower cover plate (103a, 103b) that close two ends of the stator casing (101a, 101b); and
an intermediate shaft sleeve (104a, 104b) located in the middle of the stator casing (101a, 101b), wherein the stator casing (101a, 101b), the upper cover plate (102a, 102b), the lower cover plate (103a, 103b) and the intermediate shaft sleeve (104a, 104b) together define the enclosed chamber,
the cooling system is characterized in that,
the cooling system further comprises:
a liquid spraying cavity (500a, 500b) for containing liquid, which is provided on the housing (100a, 100b, 100c, 101d, 100e);
a liquid inlet (300a, 300b) communicating with the liquid spraying cavity (500a, 500b);
a liquid outlet (400a, 400b) communicating with the enclosed chamber; and
a liquid spraying component (600a, 600b) provided on an inner wall of the housing (100a, 100b, 100c, 101d, 100e), which corresponds to the stator iron core (200a, 200b, 200c, 200d, 300e),
two first spoilers (700a, 700b) are provided on an inner wall of the stator casing (101a, 101b); an area of the enclosed chamber, which is close to the liquid outlet (400a, 400b), is separated as a liquid return area by the first spoilers (700a, 700b), and an area of the enclosed chamber close to the liquid spraying component (600a, 600b) is separated as a liquid spraying area,
the two first spoilers (700a, 700b) are respectively located on two sides of the liquid outlet (400a, 400b).