CN220874342U

CN220874342U - Rotor shaft assembly and axial motor

Info

Publication number: CN220874342U
Application number: CN202322665092.2U
Authority: CN
Inventors: 康亚杰; 任政昊; 殷毅俊
Original assignee: Magelec Propulsion Ltd
Current assignee: Magelec Propulsion Ltd
Priority date: 2023-09-28
Filing date: 2023-09-28
Publication date: 2024-04-30
Anticipated expiration: 2033-09-28

Abstract

The utility model discloses a rotor shaft assembly, wherein a water inlet and a water outlet are formed in an end cover, the water inlet and the water outlet penetrate through the end cover along the axial direction, the water inlet and the water outlet are arranged at intervals along the radial direction, and the end cover surrounds one end of a connecting shaft; the connecting shaft is provided with a first liquid inlet channel and a first liquid outlet channel, wherein one end of the connecting shaft is connected with the end cover, a first sealing piece is arranged between one end of the connecting shaft and the end cover, at least part of the connecting shaft extends along the axial direction and is provided with a containing cavity penetrating the connecting shaft along the axial direction; the rotating device is arranged in the accommodating cavity, the rotating device is provided with a cavity extending along the axial direction and a liquid outlet groove positioned outside the cavity, and the cavity is communicated with the water inlet through a connecting pipe. According to the utility model, through the special structural design of the rotor shaft assembly, the cooling medium is conveyed to the rotor disc, so that the rotor is cooled, other cooling devices are not required to be added, the cost is saved, the rotor is suitable for various axial motors, and the rotor is convenient to process. The utility model also provides an axial motor.

Description

Rotor shaft assembly and axial motor

Technical Field

The utility model relates to the field of motors, in particular to a rotor shaft assembly and an axial motor.

Background

The axial motor is different from the ordinary radial motor in structure because the axial motor has an axial magnetic flux direction. The axial flux motor has the advantages of small volume, low noise, high rotating speed, high power density and the like, so that the axial flux motor is widely applied. However, in the working process of the axial motor, the alternating magnetic field can generate eddy current loss on the magnetic steel to cause the magnetic steel to heat, and friction with air at high rotating speed can also cause the magnetic steel to heat, so that the whole rotor heats.

At present, liquid cooling is mostly adopted for heat dissipation of a rotor, new heat dissipation equipment is needed to be added or the axial motor is greatly improved, so that the processing of the axial motor becomes more complex, and additional cost is increased.

Disclosure of utility model

The utility model aims to solve the problem of how to save the heat dissipation cost of an axial motor. The utility model provides a rotor shaft assembly and an axial motor, wherein a cooling medium can be conveyed to a rotor disc through a special structural design of the rotor shaft assembly, so that the rotor is radiated, the circulation of the cooling medium in the axial motor is realized, other radiating devices are not required to be added, the cost is saved, the rotor shaft assembly is suitable for various axial motors, and the rotor shaft assembly is convenient to process.

To solve the above technical problems, embodiments of the present utility model disclose a rotor shaft assembly, including: an end cover, a connecting shaft and a rotary device, wherein,

The end cover is provided with a water inlet and a water outlet, the water inlet and the water outlet penetrate through the end cover along the axial direction, the water inlet and the water outlet are arranged at intervals along the radial direction, and the end cover surrounds one end of the connecting shaft;

One end of the connecting shaft is connected with the end cover, a first sealing piece is arranged between one end of the connecting shaft and the end cover, at least part of the connecting shaft extends along the axial direction and is provided with a containing cavity penetrating through the connecting shaft along the axial direction, and the connecting shaft is also provided with a first liquid inlet channel and a first liquid outlet channel;

The rotary device is arranged in the accommodating cavity, a cavity extending along the axial direction and a liquid outlet groove positioned outside the cavity are formed in the rotary device, the cavity is communicated with the water inlet through a connecting pipe, a second liquid outlet channel is formed by the connecting pipe and the inner wall of the accommodating cavity in a surrounding mode, and a third liquid outlet channel is formed by the liquid outlet groove and the inner wall of the accommodating cavity in a surrounding mode; wherein,

The first liquid inlet channel is communicated with the cavity, the first liquid outlet channel is communicated with the third liquid outlet channel, the third liquid outlet channel is communicated with the second liquid outlet channel, and the second liquid outlet channel is communicated with the water outlet.

The embodiment of the application adopts liquid cooling heat dissipation, so that the embodiment of the application is developed by taking cooling liquid as a cooling medium as an example for description, and the rotor shaft assembly is mainly applied to an axial motor.

By adopting the technical scheme, through first liquid inlet channel and cavity intercommunication, first liquid outlet channel and third liquid outlet channel intercommunication, third liquid outlet channel and second liquid outlet channel intercommunication, second liquid outlet channel and delivery port intercommunication, make the coolant liquid get into the cavity by the water inlet, get into first liquid inlet channel by the cavity again, flow out by the liquid inlet channel, after having absorbed the heat that the rotor produced, get into third liquid outlet channel by first liquid outlet channel again, flow into second liquid outlet channel again, finally flow out by the delivery port, can realize the circulation of coolant liquid in axial motor, accomplish the heat dissipation to the rotor high-efficient conveniently, the part that above-mentioned part is all from the part of taking of axial motor constitutes simultaneously, only need put into the slewer and hold the intracavity of connecting axle self, need not to increase other heat abstractor, save the cost, be applicable to various axial motors, and convenient processing.

According to another specific embodiment of the present utility model, a rotor shaft assembly is disclosed in an embodiment of the present utility model, the connecting shaft includes a body portion and a connecting portion, the body portion extends along the axial direction and is provided with the accommodating cavity, the connecting portion surrounds the body portion along the circumferential direction and extends along the radial direction, and the connecting portion is provided with the first liquid inlet channel and the first liquid outlet channel.

By adopting the technical scheme, the first liquid inlet channel is formed in the connecting part, a channel is provided for the cooling liquid to flow into the rotor part needing heat dissipation from the rotor shaft assembly, the first liquid outlet channel is formed in the connecting part, the channel is provided for the cooling liquid absorbing the heat of the rotor to flow out from the rotor shaft assembly, the flow of the cooling liquid between the rotor and the rotor shaft assembly is realized through the simple channel, the heat dissipation of the rotor is simpler and more efficient, other heat dissipation devices are not required to be added, the cost is saved, the cooling liquid is applicable to various axial motors, and the processing is convenient.

According to another embodiment of the present utility model, a rotor shaft assembly is disclosed, wherein the first liquid inlet channel comprises a first channel and a second channel, the first channel extends along the radial direction, the second channel extends along the axial direction, one end of the first channel is communicated with the cavity, and the other end of the first channel is communicated with one end of the second channel.

By adopting the technical scheme, one end of the first channel is communicated with the cavity, and the other end of the first channel is communicated with one end of the second channel, so that cooling liquid can flow into the first channel from the cavity and flow to the second channel from the first channel, and the cooling liquid can flow to the liquid inlet channel from the turning device, so that the smooth cooling process is ensured.

According to another embodiment of the present utility model, a rotor shaft assembly is disclosed in which the first liquid outlet passage includes a fourth passage extending in the radial direction and a fifth passage extending in the axial direction, one end of the fourth passage communicating with the third liquid outlet passage, and the other end of the fourth passage communicating with one end of the fifth passage.

By adopting the technical scheme, one end of the fourth channel is communicated with the third liquid outlet channel, and the other end of the fourth channel is communicated with one end of the fifth channel, so that the cooling liquid absorbing the heat of the rotor can flow from the fifth channel to the fourth channel, then flow into the third liquid outlet channel, then flow from the third liquid outlet channel to the second liquid outlet channel, and finally flow out from the water outlet, and finally the cooling liquid absorbing the heat can be discharged from the water outlet, thereby ensuring the smooth cooling process.

According to another specific embodiment of the present utility model, a rotor shaft assembly is disclosed, wherein the connecting shaft includes a body portion and a connecting portion, the body portion extends along the axial direction, the housing cavity, the first liquid inlet channel extending along the radial direction, and the first liquid outlet channel extending along the radial direction are provided, the first liquid inlet channel and the first liquid outlet channel are arranged at intervals along the circumferential direction of the housing cavity, and the connecting portion surrounds the body portion along the circumferential direction and extends along the radial direction.

By adopting the technical scheme, the first liquid inlet channel is formed in the body part, a channel is provided for cooling liquid to flow into the rotor part requiring heat dissipation from the rotor shaft assembly, the first liquid outlet channel is formed in the body part, the channel is provided for cooling liquid absorbing heat of the rotor to flow out of the rotor shaft assembly, and the flow of the cooling liquid between the rotor and the rotor shaft assembly is realized through simple channel arrangement, so that the heat dissipation of the rotor is simpler and more efficient.

According to another embodiment of the present utility model, a rotor shaft assembly is disclosed, wherein the first liquid inlet passage includes a third passage extending in the radial direction, and one end of the third passage communicates with the chamber.

By adopting the technical scheme, one end of the third channel is communicated with the cavity, so that the cooling liquid can flow into the third channel from the cavity, and the cooling liquid can flow to the first liquid inlet channel from the turning device, thereby ensuring the smooth cooling process.

According to another embodiment of the present utility model, a rotor shaft assembly is disclosed, wherein the first liquid outlet passage includes a sixth passage extending in the radial direction, and one end of the sixth passage communicates with the third liquid outlet passage.

By adopting the technical scheme, one end of the sixth channel is communicated with the third liquid outlet channel, so that the cooling liquid absorbing the heat of the rotor can flow into the third liquid outlet channel from the sixth channel, flow into the second liquid outlet channel from the third liquid outlet channel, and finally flow out from the water outlet, and the cooling liquid absorbing the heat can be finally discharged from the water outlet, thereby ensuring the smooth cooling process.

According to another embodiment of the utility model, a rotor shaft assembly is disclosed, wherein a second sealing element is arranged between the turning device and the connecting pipe, the second sealing element is arranged in the turning device and forms the cavity together with the turning device, and the second sealing element surrounds one end of the connecting pipe, which is far away from the water inlet.

By adopting the technical scheme, the sealing performance between the rotating device and the connecting pipe can be effectively ensured by arranging the second sealing piece, so that the problem of overflow of cooling liquid when flowing to the cavity from the connecting pipe is prevented.

According to another embodiment of the utility model, a rotor shaft assembly is disclosed, wherein the turning device comprises a plurality of liquid inlets which are distributed at intervals along the outer wall of the chamber along the circumferential direction, and the liquid inlets are communicated with the chamber and the first liquid inlet channel.

By adopting the technical scheme, through setting up a plurality of feed inlets to and feed inlet and cavity and first feed liquor passageway intercommunication for the coolant liquid can flow to a plurality of feed inlets respectively by the cavity, again flows to a plurality of first feed liquor passageways, thereby can carry out heat exchange to a plurality of rotors, makes the heat dissipation more high-efficient.

According to another embodiment of the utility model, the rotor shaft assembly is disclosed, the liquid outlet groove comprises a plurality of liquid outlet grooves which are arranged at intervals along the circumferential direction, the liquid outlet grooves and the liquid inlet holes are distributed at intervals along the outer wall of the cavity along the circumferential direction, and the liquid outlet grooves extend along the axial direction and are communicated with the first liquid outlet channel.

By adopting the technical scheme, through setting up a plurality of liquid outlet tanks to and liquid outlet tank and first liquid outlet channel intercommunication, make the coolant liquid that has absorbed the heat of rotor, can follow first liquid outlet channel flow to each liquid outlet tank and hold the third liquid outlet channel that the inner wall of chamber formed, follow third liquid outlet channel flow to second liquid outlet channel again, flow out from the delivery port at last, so that the coolant liquid that has absorbed the heat can follow the delivery port and discharge at last, guarantee going on smoothly of cooling process.

According to another embodiment of the utility model, a rotor shaft assembly is disclosed, wherein a connecting hole is formed in one end of the turning device, which is far away from the end cover, and the connecting holes are arranged at intervals along the turning device along the circumferential direction and are used for connecting the connecting shaft.

By adopting the technical scheme, the rotary device can be firmly connected with the connecting shaft by arranging the connecting hole.

The embodiment of the utility model also discloses an axial motor, which comprises a rotor disc and the rotor shaft assembly in any embodiment, wherein the rotor disc circumferentially surrounds at least part of the connecting shaft, the rotor disc is provided with cooling pipelines which are circumferentially distributed at intervals, at least part of the cooling pipelines are communicated with the first liquid inlet channel, and at least the other part of the cooling pipelines are communicated with the first liquid outlet channel.

By adopting the technical scheme, through at least partial cooling pipeline and first feed liquor channel intercommunication for the coolant liquid can flow into the cooling pipeline by first feed liquor channel, after absorbing the heat that the rotor produced, through at least another partial cooling pipeline and first feed liquor channel intercommunication, make the coolant liquid that has absorbed the heat of rotor can flow into first feed liquor channel from another partial cooling pipeline, get into third feed liquor channel by first feed liquor channel again, flow into second feed liquor channel again, finally flow out by the delivery port, realize the circulation flow of coolant liquid between rotor shaft subassembly and rotor dish, can accomplish the heat dissipation to the rotor high-efficiently conveniently, need not to increase other heat abstractor simultaneously, save the cost, be applicable to various axial motors, and convenient processing.

The embodiment of the utility model also discloses an axial motor, the cooling pipeline comprises a second liquid inlet channel and a fourth liquid outlet channel, the second liquid inlet channel comprises a seventh channel which extends along the radial direction and an eighth channel which extends along the axial direction, one end of the seventh channel is communicated with one end of the eighth channel, the other end of the eighth channel is communicated with the first liquid inlet channel, the fourth liquid outlet channel comprises a ninth channel which extends along the radial direction and a tenth channel which extends along the axial direction, one end of the ninth channel is communicated with one end of the tenth channel, the other end of the tenth channel is communicated with the first liquid outlet channel, and the plane of the bottom wall of the cavity, which is far away from one end of the end cover, is not lower than the plane of the inner top wall of the seventh channel, which is close to one end of the end cover, and the plane of the ninth channel, which is not lower than the inner top wall of the end cover, which is close to the end cover.

By adopting the technical scheme, the plane of the bottom wall of one end of the end cover is far away from the cavity and is not lower than the plane of the inner top wall of one end of the seventh channel, which is close to the end cover, and the plane of the inner top wall of one end of the ninth channel, which is close to the end cover, are designed in such a way that the first liquid inlet channel is arranged on the connecting part of the connecting shaft, other sealing devices are not needed to be additionally arranged between the connecting shaft and the rotor disc, so that the coolant can be ensured not to overflow when flowing to the second liquid inlet channel from the first liquid inlet channel, the processing steps are saved, and the cost is saved.

The embodiment of the utility model also discloses an axial motor, the cooling pipeline comprises a second liquid inlet channel extending along the radial direction and a fourth liquid outlet channel extending along the radial direction, the second liquid inlet channel and the fourth liquid outlet channel are arranged at intervals along the circumferential direction, the second liquid inlet channel is communicated with the first liquid inlet channel, the fourth liquid outlet channel is communicated with the first liquid outlet channel, and along the axial direction, the plane of the bottom wall of the cavity far from one end of the end cover is in the same plane with the plane of the inner bottom wall of the second liquid inlet channel near one end of the end cover and the plane of the inner bottom wall of the fourth liquid outlet channel near one end of the end cover.

By adopting the technical scheme, the plane of the bottom wall of one end of the cavity far away from the end cover is in the same plane with the plane of the inner bottom wall of one end of the second liquid inlet channel close to the end cover and the plane of the inner bottom wall of one end of the fourth liquid outlet channel close to the end cover, so that the first liquid inlet channel and the second liquid inlet channel are in the same plane, and the connecting shaft and the rotor disc are simpler to process.

Drawings

Fig. 1 shows a cross-sectional view of an axial motor provided by an embodiment of the present utility model, in which one positional relationship of a chamber of a rotary device and a cooling line of a rotor disc is shown, and one positional relationship of a first liquid inlet channel, a second liquid inlet channel, and a third liquid inlet channel, and a first liquid outlet channel, a third liquid outlet channel, and a fourth liquid outlet channel is also shown.

FIG. 1a illustrates another schematic positional relationship of a chamber of a rotary device and cooling lines of a rotor disk provided by an embodiment of the present utility model.

Fig. 1b shows another schematic positional relationship among a first liquid inlet channel, a second liquid inlet channel, a third liquid inlet channel, a first liquid outlet channel, a third liquid outlet channel, and a fourth liquid outlet channel according to an embodiment of the present utility model.

FIG. 2 illustrates a cross-sectional view of a rotor shaft assembly including an end cap, a connecting shaft, and a swivel device, provided in an embodiment of the utility model.

Fig. 3 shows a cross-sectional view of a connection shaft and a swivel device provided by an embodiment of the utility model.

Fig. 4 shows a perspective view of a slewing device provided by an embodiment of the utility model.

Fig. 5 shows a second perspective view of a slewing device according to an embodiment of the present utility model.

Fig. 5a shows a projection of the inlet opening.

Fig. 5b shows a projection of the third feed channel.

Fig. 6 shows a third perspective view of a slewing device provided by an embodiment of the utility model.

Fig. 7 shows a perspective view of an axial motor provided by an embodiment of the present utility model.

Fig. 8 shows a perspective view of an embodiment of the present utility model providing a rotor disk.

FIG. 9 illustrates a cross-sectional view of an embodiment of the present utility model providing a rotor disk.

Fig. 10 shows a cross-sectional view of an embodiment of the present utility model providing a rotor skeleton.

Fig. 11 shows a perspective view of a cooling portion provided by an embodiment of the present utility model, in which an upper cooling portion is located on the left side and a lower cooling portion is located on the right side in the circumferential direction.

Fig. 12 shows a perspective view of an embodiment of the present utility model providing a lower cooling section.

Detailed Description

Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present utility model with specific examples. While the description of the utility model will be described in connection with the preferred embodiments, it is not intended to limit the inventive features to the implementation. Rather, the purpose of the utility model described in connection with the embodiments is to cover other alternatives or modifications, which may be extended by the claims based on the utility model. The following description contains many specific details for the purpose of providing a thorough understanding of the present utility model. The utility model may be practiced without these specific details. Furthermore, some specific details are omitted from the description in order to avoid obscuring the utility model. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

It should be noted that in this specification, like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present embodiment, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present utility model.

The terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present embodiment can be understood in a specific case by those of ordinary skill in the art.

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.

The embodiment of the application adopts liquid cooling heat dissipation, so that the embodiment of the application uses the cooling liquid as a cooling medium for description, and the used cooling liquid can be non-conductive organic liquid or conductive organic liquid.

Referring to fig. 1 to 3, the present application provides a rotor shaft assembly including: the end cover 1, the connecting shaft 2 and the rotating device 3, wherein the end cover 1 is provided with a water inlet 10 and a water outlet 11, the water inlet 10 and the water outlet 11 penetrate through the end cover 1 along the axial direction (namely the X direction shown in the figure 1), the water inlet 10 and the water outlet 11 are arranged at intervals along the radial direction (namely the Y direction shown in the figure 1), and the end cover 1 surrounds one end 20 of the connecting shaft 2; one end 20 of the connecting shaft 2 is connected with the end cover 1, a first sealing element 12 is arranged between the end 20 of the connecting shaft 2 and the end cover 1, at least part of the connecting shaft 2 extends along the axial direction (namely, the X direction shown in fig. 1), a containing cavity 21 penetrating through the connecting shaft 2 along the axial direction (namely, the X direction shown in fig. 1) is formed, and the connecting shaft 2 is further provided with a first liquid inlet channel 22 and a first liquid outlet channel 23.

1-3, The rotator 3 is disposed in the accommodating cavity 21, the rotator 3 is provided with a cavity 30 extending along an axial direction (i.e. X direction shown in FIG. 2) and a liquid outlet groove 31 located outside the cavity 30, the cavity 30 is communicated with the water inlet 10 through a connecting pipe 32, the connecting pipe 32 and the inner wall of the accommodating cavity 21 enclose a second liquid outlet channel 24, and the liquid outlet groove 31 and the inner wall of the accommodating cavity 21 enclose a third liquid outlet channel 25; wherein, the first liquid inlet channel 22 is communicated with the chamber 30, the first liquid outlet channel 23 is communicated with the third liquid outlet channel 25, the third liquid outlet channel 25 is communicated with the second liquid outlet channel 24, and the second liquid outlet channel 24 is communicated with the water outlet 11.

Illustratively, the first liquid inlet channel 22 is communicated with the chamber 30, the first liquid outlet channel 23 is communicated with the third liquid outlet channel 25, the third liquid outlet channel 25 is communicated with the second liquid outlet channel 24, and the second liquid outlet channel 24 is communicated with the water outlet 11, so that the cooling liquid can enter the chamber 30 from the water inlet 10, enter the first liquid inlet channel 22 from the chamber 30, flow out from the first liquid inlet channel 22, absorb heat generated by magnetic steel 41, enter the third liquid outlet channel 25 from the first liquid outlet channel 23, flow into the second liquid outlet channel 24, and finally flow out from the water outlet 11.

In some embodiments, the specific structure of the slewing device 3 is shown in fig. 4 to 6.

Referring to fig. 4, the rotary device 3 is cylindrical and includes a chamber 30 and a liquid outlet groove 31, the chamber 30 extends along an axial direction (i.e. X direction shown in fig. 4), one end 301 of the chamber 30 is closed along the axial direction (i.e. X direction shown in fig. 4), the other end is provided with a first liquid inlet 300, the first liquid inlet 300 is along a circumferential direction (i.e. a direction shown in fig. 4), the outer wall of the chamber 30 is provided with five liquid inlet through holes 302, and each liquid inlet through hole 302 is communicated with the chamber 30 along a radial direction (i.e. Y direction shown in fig. 4).

Referring to fig. 2 to 4, the liquid outlet grooves 31 include five liquid outlet grooves 31 arranged at intervals along the outer wall of the chamber 30 in the circumferential direction (i.e., the direction a shown in fig. 4), each liquid outlet groove 31 extends in the axial direction (i.e., the direction X shown in fig. 4), one end 311 of the liquid outlet groove 31 is closed in the axial direction (i.e., the direction X shown in fig. 4), the other end is provided with a liquid outlet 310, and one end of the liquid outlet groove 31 away from the outer wall of the chamber 30 in the radial direction (i.e., the direction Y shown in fig. 4) has an opening, and forms five third liquid outlet passages 25 with the inner wall of the accommodating chamber 21 and communicates with the first liquid outlet passage 23.

Referring to fig. 4 and referring to fig. 1 to 3, the cooling liquid can enter the first liquid inlet 300 from the above-mentioned water inlet 10 and then enter the chamber 30, flow into the five liquid inlet holes 302 from the chamber 30, then enter the corresponding first liquid inlet channels 22 from the five liquid inlet holes 302, flow out from the first liquid inlet channels 22, exchange heat with the magnetic steel 41 described later, then flow into the five liquid outlet grooves 31 (i.e. into the five third liquid outlet channels 25) from the first liquid outlet channels 23, then flow into the second liquid outlet channels 24, and finally flow out from the water outlet 11.

It should be noted that, the specific number of the liquid outlet grooves 31 and the liquid inlet holes 302 is not limited in the embodiment of the present application, and may be five liquid outlet grooves 31 and five liquid inlet holes 302, six liquid outlet grooves 31 and six liquid inlet holes 302, or ten liquid outlet grooves 31 and ten liquid inlet holes 302 shown in the embodiment of the present application; meanwhile, the embodiments of the present application do not limit the types of the first sealing member 12 and the second sealing member 33, and oil seals or gaskets may be used.

Illustratively, referring to fig. 4, by providing five liquid inlet holes 302 that are connected to the chamber 30 in the radial direction (i.e., the Y direction shown in fig. 4) and one end 301 of the chamber 30 is closed, the cooling liquid flowing into the chamber 30 from the first liquid inlet 300 can flow into the five liquid inlet holes 302, and then flow out from the five liquid inlet holes 302, and at the same time, five liquid outlet grooves 31 having openings at one end far from the outer wall of the chamber 30 are provided, so that the cooling liquid and the magnetic steel described later can flow into the five liquid outlet grooves 31 after heat exchange.

With continued reference to fig. 4 and with reference to fig. 3, the turning device 3 further includes five protruding blocks 34, where the five protruding blocks 34 are circumferentially (i.e., a direction shown in fig. 4) arranged on the outer wall of the cavity 30 at intervals, each protruding block 34 extends in the axial direction (i.e., X direction shown in fig. 4), two adjacent protruding blocks 34 form a liquid outlet groove 31, a third liquid inlet channel 340 is disposed on each protruding block 34, the third liquid inlet channel 340 is communicated with the liquid inlet through hole 302 in the radial direction (i.e., Y direction shown in fig. 4) to form a liquid inlet, the liquid inlet is communicated with the first liquid inlet channel 22, the liquid outlet grooves 31 and the third liquid inlet channels 340 are circumferentially (i.e., a direction shown in fig. 4) arranged at intervals, i.e., one third liquid inlet channel 340 is disposed between the two liquid outlet grooves 31, or one liquid outlet groove 31 is disposed between the two third liquid inlet channels 340.

Referring to fig. 5 and referring to fig. 3, in an axial direction (i.e., the X direction shown in fig. 5), the third liquid inlet channel 340 is disposed at the bottom end of the bump 34, and a plane (i.e., a plane B in fig. 5) on which a side of the third liquid inlet channel 340 away from the top end of the bump 34 is located is in the same plane as a plane (i.e., a plane C in fig. 5) on which one end of the liquid outlet groove 31 is located, so that the first liquid inlet channel 22 communicating with the third liquid inlet channel 340 and the first liquid outlet channel 23 of the connecting shaft 2 communicating with the liquid outlet groove 31 can be in the same plane, thereby facilitating the processing and manufacturing of the connecting shaft 2.

For example, referring to fig. 5a and 5b in combination with fig. 5, the projection of the third liquid inlet channel 340 is quadrangular in the radial direction (i.e., Y direction shown in fig. 5), the projection of the liquid inlet through hole 302 is circular, and the projection of the third liquid inlet channel 340 covers the projection of the liquid inlet through hole 302, i.e., the area of the third liquid inlet channel 340 is larger than the area of the liquid inlet through hole 302, so that the flow of the cooling liquid can be smoother.

Illustratively, referring to fig. 6, the turning device 3 further includes a connecting plate 35, where the connecting plate 35 includes a first portion 350, a second portion 351 and a third portion 352, the connecting plate 35 is in a cylindrical structure, and the first portion 350, the second portion 351 and the third portion 352 are integrally formed in the actual manufacturing process, the second portion 351 and the third portion 352 circumferentially (i.e., a direction shown in fig. 6) surround the first portion 350, and the second portion 351 and the third portion 352 are circumferentially (i.e., a direction shown in fig. 6) spaced apart, that is, one third portion 352 is disposed between two second portions 351, or one second portion 351 is disposed between two third portions 352.

Referring to fig. 5 and 6, the first portion 350 is a cylinder, and the diameter of the first portion 350 is R1 and is disposed at one end of the chamber 30 to serve as a closed end of the chamber 30, that is, the first portion 350 is located at the bottom end of the chamber 30 along the X direction shown in fig. 6, that is, the diameter R1 of the first portion 350 is equal to the diameter R2 of the outer wall of the chamber 30, that is, the first portion 350 extends upward along the X direction shown in fig. 6 to form a large cylinder, and the chamber 30 is hollowed out inside the cylinder.

The second portion 351 is disposed at one end of the liquid outlet tank 31, and is used as a closed end of the liquid outlet tank 31. That is, the second portion 351 is located at the bottom end of the liquid outlet tank 31 in the X direction shown in fig. 6.

Referring to fig. 6, the third portion 352 is disposed at the bottom end of the bump 34 and is integrally formed with the bump 34.

Illustratively, the end of the connection plate 35 remote from the chamber 30 is provided with a connection hole 353, and the connection hole 353 is used for connecting the connection shaft 2, so that the swivel device 3 can be firmly connected to the connection shaft 2.

Referring to fig. 5 and 6 in combination with fig. 1, the connection hole 353 includes two or three or more connection plates 35 disposed at intervals in the circumferential direction (i.e., the direction a shown in fig. 6), but is not limited thereto, and the second seal 33 is disposed between the turn device 3 and the connection pipe 32, and the second seal 33 is disposed in the turn device 3 and forms the chamber 30 together with the turn device 3, and the second seal 33 surrounds one end of the connection pipe 32 away from the water inlet 10, and the second seal 33 can effectively ensure tightness between the turn device 3 and the connection pipe 32, thereby preventing an overflow problem of the coolant when flowing from the connection pipe 32 to the chamber 30.

Illustratively, with reference to fig. 7 and 8, the present application also provides an axial electric machine comprising the rotor shaft assembly described above and a rotor disc 4, the rotor disc 4 surrounding at least part of the connecting shaft 2 in the circumferential direction (i.e. the a-direction shown in fig. 7), the rotor disc 4 being provided with cooling lines distributed at intervals in the circumferential direction (i.e. the a-direction shown in fig. 7), the specific construction of the rotor disc 4 in some embodiments being with reference to fig. 7 to 12.

Example 1

Referring to fig. 7 and 8, the rotor disk 4 includes: the number of the rotor skeleton 40 and the ten magnetic steels 41 can be selected according to actual working requirements, however, the number of the magnetic steels 41 can be selected according to actual working requirements, the rotor skeleton 40 is provided with cooling pipelines at intervals along the circumferential direction (namely, the direction A shown in FIG. 8), namely, five second liquid inlet channels 400 and five fourth liquid outlet channels 401, the five second liquid inlet channels 400 and the five fourth liquid outlet channels 401 are distributed at intervals along the circumferential direction (namely, the direction A shown in FIG. 8), namely, one fourth liquid outlet channel 401 is arranged between the two second liquid inlet channels 400, or one second liquid inlet channel 400 is arranged between the two fourth liquid outlet channels 401, and the rotor skeleton 40 further comprises ten containing portions 402 along the circumferential direction (namely, the direction A shown in FIG. 8), and the ten containing portions 402 are distributed at intervals along the rotor skeleton 40.

Referring to fig. 7 to 10, ten magnetic steels 41 are in one-to-one correspondence with ten accommodating portions 402, each magnetic steel 41 is located in a corresponding accommodating portion 402, cooling portions 410 are disposed on both left and right sides of each magnetic steel 41 along an axial direction (i.e., an X direction shown in fig. 9), each cooling portion comprises an upper cooling portion 4100 located on the left side and a lower cooling portion 4101 located on the right side, the upper cooling portions 4100 and the lower cooling portions 4101 are located in the corresponding accommodating portions 402 and are distributed at intervals along the axial direction, an upper rotary groove 411 is formed on one side of the upper cooling portion 4100 close to the magnetic steel 41, an upper cooling channel 412 is formed between the upper rotary groove 411 and the upper surface of the magnetic steel 41, a lower rotary groove 414 is formed on one side of the lower cooling portion 4101 close to the magnetic steel 41, a liquid separation channel 413 is disposed between the two adjacent accommodating portions 402, and the liquid separation channel 413 is communicated with the upper cooling channels 412 and the lower cooling channels 415 of the two adjacent magnetic steels 41.

Wherein, five upper cooling channels 412 and five lower cooling channels 415 axially opposite thereto are all communicated with the second liquid inlet channel 400, and the other five upper cooling channels 412 and five lower cooling channels 415 axially opposite thereto are all communicated with the fourth liquid outlet channel 401.

Wherein, the cooling liquid can enter the upper cooling channel 412 and the lower cooling channel 415 from the second liquid inlet channel 400, and then enter the fourth liquid outlet channel 401 from the upper cooling channel 412 and the lower cooling channel 415. By arranging the five second liquid inlet channels 400 and the five fourth liquid outlet channels 401 on the rotor skeleton 40, the cooling liquid can enter the rotor skeleton 40 from the five second liquid inlet channels 400, then enter five upper cooling channels 412 and lower cooling channels 415 communicated with the five second liquid inlet channels 400, and exchange heat with the upper and lower surfaces of the five magnetic steels 41, and as the liquid separating channels 413 are arranged between the two adjacent accommodating parts 402, the liquid separating channels 413 are communicated with the upper cooling channels 412 and the lower cooling channels 415 on the two adjacent magnetic steels 41, the cooling liquid which exchanges heat with the five magnetic steels 41 can flow into the upper cooling channels 412 and the lower cooling channels 415 of the two adjacent magnetic steels 41 through the liquid separating channels 413, then take away the heat of the upper and lower surfaces of the two adjacent magnetic steels 41, and the cooling liquid which absorbs the heat of the upper and lower surfaces of the two adjacent magnetic steels 41 can enter the fourth liquid outlet channels 401 communicated with the upper and lower surfaces of the magnetic steels 41, and then flow out of the fourth liquid outlet channels 401, thereby completing the heat dissipation of the upper and lower surfaces of the magnetic steels 41.

As an example, referring to fig. 7 to 10, the rotor disc 4 further includes a rotor outer ring 42, wherein the rotor outer ring 42 is made of an insulating material, the rotor outer ring 42 circumferentially (i.e., a direction a shown in fig. 7) surrounds the rotor skeleton 40, the outer periphery of the rotor skeleton 40 is provided with grooves 403, the grooves 403 and the accommodating portions 402 are circumferentially (i.e., a direction a shown in fig. 10) spaced apart, i.e., one accommodating portion 402 is provided between the two grooves 403, or one groove 403 is provided between the two accommodating portions 402, the grooves 403 form a liquid separating channel 413 with an inner wall of the rotor outer ring 42, and the liquid separating channel 413 is communicated with the upper cooling channels 412 and the lower cooling channels 415 of the upper and lower surfaces of the adjacent two magnetic steels 41, so that cooling liquid can enter the upper cooling channels 412 and the lower cooling channels 415 communicated with the second liquid separating channel 400, and then flow to the upper and lower cooling channels 412 and the lower cooling channels 415 of the adjacent two magnetic steels 41 through the liquid separating channel 413.

Illustratively, referring to fig. 9 in combination with fig. 11, the upper cooling portion 4100 and the lower cooling portion 4101 are SMC (Sheet molding compound sheet molding compound) boards, and the SMC boards are attached to the upper and lower sides of the magnetic steel 41 in the axial direction (i.e., the X direction shown in fig. 9). SMC plates are attached to the upper and lower surfaces of the magnetic steel 41, an upper rotary slot 411 is formed in the surface of the SMC plate on the upper surface, a lower rotary slot 414 is formed in the surface of the SMC plate on the lower surface, an upper cooling channel 412 and a lower cooling channel 415 (refer to fig. 9) are formed with the upper and lower surfaces of the magnetic steel 41 respectively, a pipeline space is provided for heat dissipation of the upper and lower surfaces of the magnetic steel 41, and meanwhile, the length of an air gap and magnetic density are not influenced.

The detailed structure of upper cooling portion 4100 is described below with reference to fig. 8, 9, and 11.

Illustratively, referring to fig. 11 in combination with fig. 8 and 9, the upper swivel slot 411 includes a fourth portion 4110 and a fifth portion 4111, the fourth portion 4110 being disposed along the outer periphery of the SMC plate, the fifth portion 4111 including a first inlet 4112 and a first outlet 4113, the first inlet 4112 and the first outlet 4113 being spaced radially (i.e., in the Y-direction as shown in fig. 11) and in communication with the fourth portion 4110 to ensure the flow of cooling fluid in the upper cooling gallery 412.

Referring to fig. 11 in combination with fig. 8, the fifth portion 4111 is wavy, so that the contact area between the fifth portion 4111 and the upper surface of the magnetic steel 41 can be increased, so that the cooling liquid can fully contact the upper surface of the magnetic steel 41, can fully exchange heat with the upper surface of the magnetic steel 41, and fully carry away heat from the upper surface of the magnetic steel 41, but not limited thereto, and may be linear or irregular, the fifth portion 4111 includes six first arc portions 4114 and six first straight portions 4115, the six first arc portions 4114 and the six first straight portions 4115 are connected at intervals, and the six first straight portions 4115 are parallel to each other, but not limited thereto, and may be five or seven first straight portions 4115 and the first arc portions 4114.

The detailed structure of the lower cooling portion 4101 will be described below with reference to fig. 8, 9, 11, and 12.

Illustratively, referring to fig. 11 and 12 in combination with fig. 9, the lower swivel groove 414 includes a sixth portion 4140 and a seventh portion 4141, the sixth portion 4140 being disposed along the outer periphery of the SMC plate, the seventh portion 4141 including a second inlet 4142 and a second outlet 4143, the second inlet 4142 and the second outlet 4143 being spaced radially (i.e., in the Y-direction as shown in fig. 12) and in communication with the sixth portion 4140 to ensure the flow of cooling fluid in the lower cooling gallery 415.

As an example, referring to fig. 11 and 12 in combination with fig. 8, the seventh portion 4141 is wavy, so that the contact area between the seventh portion 4141 and the lower surface of the magnetic steel 41 can be increased, so that the cooling liquid can fully contact the lower surface of the magnetic steel 41, can fully exchange heat with the lower surface of the magnetic steel 41, and fully carry away the heat of the lower surface of the magnetic steel 41, but not limited thereto, and can also be linear or in other irregular shapes, the seventh portion 4141 includes six second arc portions 4144 and six second straight portions 4145, the six second arc portions 4144 and the six second straight portions 4145 are connected at intervals, and the six second straight portions 4145 are parallel to each other, but not limited thereto, and can also be five or seven second straight portions and second arc portions.

Referring to fig. 11 and 12 in combination with fig. 8, six first straight portions 4115 and six second straight portions 4145 are disposed at intervals up and down in the axial direction (i.e., the X direction shown in fig. 8), and are parallel to each other, the first inlet 4112 is bent and connected to one of the first arc portions 4114 in the circumferential direction (i.e., the a direction shown in fig. 8) to the right, and the second inlet 4142 is bent and connected to one of the second arc portions 4144 in the circumferential direction (i.e., the a direction shown in fig. 8) to the left, so as to increase the contact areas of the upper cooling passage 412 and the lower cooling passage 415 with the magnetic steel 41.

For example, referring to fig. 8 to 10, a recess 404 is provided on a side of the rotor frame 40 near the accommodating portion 402, wherein one side of five recesses 404 is communicated with the second liquid inlet channel 400, one side of the other five recesses 404 is communicated with the fourth liquid outlet channel 401, and the other sides of ten recesses 404 are communicated with the upper cooling channel 412 and the lower cooling channel 415; the cooling liquid can enter the corresponding concave portion 404 from the five second liquid inlet channels 400, enter the upper cooling channels 412 and the lower cooling channels 415 from the concave portion 404, exchange heat with the upper and lower surfaces of the five magnetic steels 41, enter the adjacent upper cooling channels 412 and lower cooling channels 415 through the liquid separating channels 413, exchange heat with the upper and lower surfaces of the other five magnetic steels 41, enter the concave portion 404 from the upper cooling channels 412 and the lower cooling channels 415, and enter the fourth liquid outlet channel 401 from the concave portion 404.

Illustratively, referring to fig. 8 in combination with fig. 1, the second liquid inlet channel 400 includes a seventh channel 4000 and an eighth channel 4001, the seventh channel 4000 extending in a radial direction (i.e., the Y direction shown in fig. 8), the eighth channel 4001 extending in an axial direction (i.e., the X direction shown in fig. 8), one end of the seventh channel 4000 communicating with one end of the eighth channel 4001, the other end of the seventh channel 4000 communicating with the recess 404, the other end of the eighth channel 4001 being connected to the first liquid inlet channel 22 described above.

Illustratively, with continued reference to fig. 8 in combination with fig. 1, the fourth liquid outlet channel 401 includes a ninth channel 4010 and a tenth channel 4011, the ninth channel 4010 extends in the radial direction (i.e., the Y direction shown in fig. 8), the tenth channel 4011 extends in the axial direction (i.e., the X direction shown in fig. 8), one end of the ninth channel 4010 communicates with one end of the tenth channel 4011, the other end of the ninth channel 4010 communicates with the recess 404, and the other end of the tenth channel 4011 is connected to the first liquid outlet channel of the connecting shaft 2 described above.

Referring to fig. 8 and 9 in combination with fig. 1 and 2, the cooling liquid enters the eighth channel 4001 from the first liquid inlet channel 22, enters the seventh channel 4000 from the eighth channel 4001, enters the concave portion 404 from the seventh channel 4000, enters the upper cooling channel 412 and the lower cooling channel 415 from the concave portion 404, exchanges heat with the upper and lower surfaces of five magnetic steels 41 therein, enters the upper cooling channel 412 and the lower cooling channel 415 adjacent to each other through the liquid separation channel 413, exchanges heat with the upper and lower surfaces of the other five magnetic steels 41, finally enters the concave portion 404 from the upper cooling channel 412 and the lower cooling channel 415, enters the ninth channel 4010 from the concave portion 404, enters the tenth channel 4011 from the ninth channel 4010, and finally enters the first liquid outlet channel 23 of the connecting shaft 2.

Referring to fig. 1 to 3, the connecting shaft 2 includes a first body portion 26 and a first connecting portion 27, the first body portion 26 extends in an axial direction (i.e., X direction shown in fig. 2) and is provided with a receiving chamber 21 extending in the axial direction (i.e., X direction shown in fig. 2), the first connecting portion 27 circumferentially (i.e., a direction shown in fig. 2) surrounds the first body portion 26 and extends in a radial direction (i.e., Y direction shown in fig. 2), and the first connecting portion 27 is provided with a first liquid inlet passage 22 and a first liquid outlet passage 23.

As an example, referring to fig. 1 to 3, when the plane (i.e., the broken line D in fig. 1) of the chamber 30 of the above-described turning device 3, which is located far from the bottom wall 303 of one end of the end cap 1, is not lower (i.e., higher or equal) than the plane (i.e., the broken line E in fig. 1) of the seventh passage 4000, which is located near the inner top wall 4002 of one end of the end cap 1, and not lower (i.e., the broken line E' in fig. 1) of the ninth passage 4010, which is located near the inner top wall of one end of the end cap 1, in the axial direction (i.e., the a direction shown in fig. 1), the first liquid inlet passage 22 of the first connection portion 27 includes the first passage 220 and the second passage 221, the first passage 220 extends in the radial direction (i.e., the Y direction shown in fig. 2), the second passage 221 extends in the axial direction (i.e., the X direction shown in fig. 2), one end of the first passage 220 communicates with the above-described third liquid inlet passage 340, and the other end of the first passage 220 communicates with one end of the second passage 221, and the other end of the second passage 221 communicates with the above-described eighth passage 4001.

Illustratively, with continued reference to fig. 2 and 3 in combination with fig. 1, the first liquid outlet passage 23 includes a fourth passage 230 and a fifth passage 231, the fourth passage 230 extending in the radial direction (i.e., the Y direction shown in fig. 2), the fifth passage 231 extending in the axial direction (i.e., the X direction shown in fig. 2), one end of the fourth passage 230 communicating with the third liquid outlet passage 25 described above, the other end of the fourth passage 230 communicating with one end of the fifth passage 231, and the other end of the fifth passage 231 communicating with the other end of the tenth passage 4011 described above.

At this time, referring to fig. 1 to 4 in combination with fig. 9, the overall flow direction of the cooling liquid is: the water enters the chamber 30 from the water inlet 10 through the connecting pipe 32, flows from the chamber 30 to the five liquid inlet through holes 302 respectively to the corresponding third liquid inlet channels 340, then flows to the corresponding first liquid inlet channel 22, flows from the first channel 220 to the second channel 221 in the first liquid inlet channel 22, then flows to the second liquid inlet channel 400, flows from the eighth channel 4001 to the seventh channel 4000 in the second liquid inlet channel 400, then flows to the corresponding upper cooling channel 412 and lower cooling channel 415, absorbs heat of the upper and lower surfaces of the corresponding magnetic steel 41, then enters the liquid dividing channel 413, flows from the liquid dividing channel 413 to the upper cooling channel 412 and the lower cooling channel 415 of the adjacent two magnetic steel 41, then flows from the upper cooling channel 412 and the lower cooling channel 415 to the concave portion 404, then flows to the fourth liquid outlet channel 401, flows from the ninth channel 4010 to the tenth channel 4011 in the fourth liquid outlet channel 401, then flows to the first liquid outlet channel 23, flows from the fifth channel 40123, and finally flows from the fourth channel 401230 to the fourth liquid outlet channel 25, and finally flows to the water outlet 11.

Or (not shown in the scheme), the connecting shaft comprises a second body part and a second connecting part, the second body part extends along the axial direction and is provided with an accommodating cavity extending along the axial direction, a first liquid inlet channel extending along the radial direction and a first liquid outlet channel extending along the radial direction, the first liquid inlet channel and the first liquid outlet channel are arranged at intervals along the circumferential direction of the accommodating cavity, and the second connecting part circumferentially surrounds the second body part and extends along the radial direction.

As an example, referring to fig. 1, 1a and 1b, in the axial direction and away from the end cap 1 (i.e. the a direction shown in fig. 1), when the plane of the cavity 30 of the rotary device 3 located away from the bottom wall 303 at one end of the end cap 1 (i.e. the dotted line D in fig. 1 a) is the same plane as the plane of the inner bottom wall 4003 at one end of the second liquid inlet channel 400 located near the end cap 1 (i.e. the dotted line F shown in fig. 1 a) and the plane of the inner bottom wall 4013 at one end of the fourth liquid outlet channel 401 located near the end cap 1 (i.e. the dotted line F shown in fig. 1 a), the first liquid inlet channel of the second body portion includes the third channel 222, the third channel 222 may extend in the radial direction (Y direction shown in fig. 1 b), and the second liquid inlet channel 400 may also include only one seventh channel 4000 extending in the radial direction, one end of the third channel 222 communicates with the third liquid inlet channel 340, and the other end of the third channel 222 communicates with the other end of the seventh channel 4000.

Referring to fig. 1 and 1a in combination with fig. 1b, the first liquid outlet channel includes a sixth channel 232, the sixth channel 232 extending in a radial direction, and the fourth liquid outlet channel 401 may also be provided to include only one ninth channel 4010 extending in a radial direction, one end of the sixth channel 232 being in communication with the third liquid outlet channel 25 described above, and the other end of the sixth channel 232 being in communication with the other end of the ninth channel 4010.

At this time, referring to fig. 1 to 4 in combination with fig. 9, the overall flow direction of the cooling liquid is: from the water inlet 10, through the connecting pipe 32, the water enters the chamber 30, flows from the chamber 30 to the five liquid inlet through holes 302 respectively to the corresponding third liquid inlet channels 340, then flows to the corresponding first liquid inlet channel 22, namely, to the third channel 222, then flows to the second liquid inlet channel 400, namely, the seventh channel 4000, then enters the corresponding upper cooling channel 412 and lower cooling channel 415, absorbs heat of the upper and lower surfaces of the corresponding magnetic steel 41, then enters the liquid dividing channel 413, then flows to the upper cooling channel 412 and lower cooling channel 415 of the adjacent two magnetic steels 41 through the liquid dividing channel 413, then absorbs heat of the upper and lower surfaces of the adjacent two magnetic steels 41, then flows to the concave part 404 from the upper cooling channel 412 and the lower cooling channel 415, then flows to the fourth liquid outlet channel 401, namely, the ninth channel 4010, then flows to the first liquid outlet channel 23, and finally flows to the water outlet 11 from the second liquid outlet channel 24 in the first liquid outlet channel 23, namely, the sixth channel 232, and then enters the third liquid outlet channel 25.

Example two

Referring to fig. 7 and 8 in combination with fig. 10, the rotor disk 4 includes: the number of the rotor skeleton 40 and the ten magnetic steels 41 can be selected according to actual working requirements, but not limited to this, the rotor skeleton 40 is provided with five second liquid inlet channels 400 and five fourth liquid outlet channels 401 at intervals along the circumferential direction (namely, the direction a shown in fig. 8), the five second liquid inlet channels 400 and the five fourth liquid outlet channels 401 are distributed at intervals along the circumferential direction (namely, the direction a shown in fig. 8), namely, one fourth liquid outlet channel 401 is arranged between the two second liquid inlet channels 400, or one second liquid inlet channel 400 is arranged between the two fourth liquid outlet channels 401, and in combination with fig. 10, the rotor skeleton 40 further comprises ten containing portions 402, and the ten containing portions 402 are distributed along the rotor skeleton 40 at intervals along the circumferential direction (namely, the direction a shown in fig. 8).

Referring to fig. 7 to 10, ten magnetic steels 41 are in one-to-one correspondence with ten accommodating portions 402, each magnetic steel 41 is located in a corresponding accommodating portion 402, cooling portions 410 are disposed on both left and right sides of each magnetic steel 41 along an axial direction (i.e., an X direction shown in fig. 9), each cooling portion comprises an upper cooling portion 4100 located on the left side and a lower cooling portion 4101 located on the right side, the upper cooling portions 4100 and the lower cooling portions 4101 are located in the corresponding accommodating portions 402 and are distributed at intervals along the axial direction, an upper rotary groove 411 is formed on one side of the upper cooling portion 4100 close to the magnetic steel 41, an upper cooling channel 412 is formed between the upper rotary groove 411 and the upper surface of the magnetic steel 41, a lower rotary groove 414 is formed on one side of the lower cooling portion 4101 close to the magnetic steel 41, a liquid separating channel 413 is disposed between the two adjacent accommodating portions 402, and the liquid separating channel 413 is communicated with the upper cooling channels 412 and the lower cooling channels 415 on the upper and lower surfaces of the two adjacent magnetic steels 41.

Wherein each of the upper cooling passage 412 and the lower cooling passage 415 is in communication with the fourth liquid outlet passage 401, and the liquid separation passage 413 is in communication with the second liquid inlet passage 400 (this connection is not shown).

Illustratively, the cooling liquid enters the rotor frame 40 from the second liquid inlet channel 400, enters the liquid separating channel 413 from the second liquid inlet channel 400, and flows into the two upper cooling channels 412 and the lower cooling channels 415 connected by the liquid separating channel 413 respectively, so as to exchange heat with the upper and lower surfaces of the magnetic steel 41, take away the heat generated by the upper and lower surfaces of the magnetic steel 41, and the cooling liquid absorbing the heat of the upper and lower surfaces of the magnetic steel 41 can enter the fourth liquid outlet channel 401 from the upper cooling channels 412 and the lower cooling channels 415 and then flow out from the fourth liquid outlet channel 401, thereby completing the heat dissipation of the upper and lower surfaces of the magnetic steel 41.

Referring to fig. 7 to 10, the rotor disk 4 further includes a rotor outer ring 42, wherein the rotor outer ring 42 is made of an insulating material, the rotor outer ring 42 circumferentially (i.e., a direction a shown in fig. 7) surrounds the rotor skeleton 40, the outer periphery of the rotor skeleton 40 is provided with grooves 403, the grooves 403 and the accommodating portions 402 are circumferentially (i.e., a direction a shown in fig. 10) spaced apart, i.e., one accommodating portion 402 is disposed between the two grooves 403, or one groove 403 is disposed between the two accommodating portions 402, and the grooves 403 and the inner wall of the rotor outer ring 42 form a fluid-distributing channel 413.

The liquid separation channel 413 is communicated with the upper cooling channel 412 and the lower cooling channel 415 on the upper surface and the lower surface of the two adjacent magnetic steels 41 and the second liquid inlet channel 400 (the connection mode is not shown in the figure), so that the cooling liquid can enter the liquid separation channel 413 from the second liquid inlet channel 400, and then flows to the upper cooling channel 412 and the lower cooling channel 415 through the liquid separation channel 413, namely, the flow of the cooling liquid in the two adjacent magnetic steels 41 is realized.

The upper and lower cooling portions 4100 and 4101 are both SMC (Sheet molding compound sheet molding compound) plates, and the SMC plates are attached to the upper and lower sides of the magnetic steel 41 in the axial direction (i.e., the X direction shown in fig. 9). SMC plates are attached to the upper and lower surfaces of the magnetic steel 41, an upper rotary slot 411 is formed in the surface of the SMC plate on the upper surface, a lower rotary slot 414 is formed in the surface of the SMC plate on the lower surface, an upper cooling channel 412 and a lower cooling channel 415 (refer to fig. 9) are formed with the upper and lower surfaces of the magnetic steel 41 respectively, a pipeline space is provided for heat dissipation of the upper and lower surfaces of the magnetic steel 41, and meanwhile, the length of an air gap and magnetic density are not influenced.

Illustratively, referring to fig. 11 in combination with fig. 9, the upper swivel slot 411 includes a fourth portion 4110 and a fifth portion 4111, the fourth portion 4110 being disposed along the outer periphery of the SMC plate, the fifth portion 4111 including a first inlet 4112 and a first outlet 4113, the first inlet 4112 and the first outlet 4113 being spaced radially (i.e., in the Y-direction as shown in fig. 11) and in communication with the fourth portion 4110 to ensure the flow of cooling fluid in the upper cooling gallery 412.

The detailed structure of the lower cooling portion 4101 is described below with reference to fig. 8, 9, and 12.

As an example, referring to fig. 11 and 12 in combination with fig. 8 and 9, the seventh portion 4141 is wave-shaped, so that the contact area between the seventh portion 4141 and the lower surface of the magnetic steel 41 can be increased, so that the cooling liquid can fully contact the lower surface of the magnetic steel 41, can fully exchange heat with the lower surface of the magnetic steel 41, and fully carry away heat from the lower surface of the magnetic steel 41, but not limited thereto, and can also be linear or other irregular shapes, the seventh portion 4141 includes six second arc portions 4144 and six second straight portions 4145, the six second arc portions 4144 and the six second straight portions 4145 are connected at intervals, and the six second straight portions 4145 are parallel to each other, but not limited thereto, and can also be five or seven second straight portions 4145 and second arc portions 4144.

Illustratively, referring to fig. 8 to 10, a rotor frame 40 is provided with recesses 404 on a side thereof adjacent to the accommodating portion 402, one side of each recess 404 being in communication with the fourth liquid outlet passage 401, and the other side of the recess 404 being in communication with the upper cooling passage 412 and the lower cooling passage 415 (this connection is not shown); so that the cooling liquid can enter the liquid separating channel 413 from the second liquid inlet channel 400, enter the upper cooling channel 412 and the lower cooling channel 415 adjacent to the liquid separating channel 413, exchange heat with the upper surface and the lower surface of the adjacent magnetic steel 41, enter the concave part 404 through the upper cooling channel 412 and the lower cooling channel 415, and enter the fourth liquid outlet channel 401 from the concave part 404.

Illustratively, referring to fig. 8 in combination with fig. 1-3, the second liquid inlet channel 400 includes a seventh channel 4000 and an eighth channel 4001, the seventh channel 4000 extending in a radial direction (i.e., the Y-direction shown in fig. 8), the eighth channel 4001 extending in an axial direction (i.e., the X-direction shown in fig. 8).

One end of the seventh channel 4000 is connected to one end of the eighth channel 4001, the other end of the seventh channel 4000 is connected to the liquid separating channel 413, and the other end of the eighth channel 4001 is connected to the first liquid inlet channel 22 (this connection is not shown).

Illustratively, with continued reference to fig. 8 in combination with fig. 1 to 3, the fourth liquid outlet channel 401 includes a ninth channel 4010 and a tenth channel 4011, the ninth channel 4010 extends in the radial direction (i.e., the Y direction shown in fig. 8), the tenth channel 4011 extends in the axial direction (i.e., the X direction shown in fig. 8), one end of the ninth channel 4010 communicates with one end of the tenth channel 4011, the other end of the ninth channel 4010 communicates with the recess 404, and the other end of the tenth channel 4011 is connected to the first liquid outlet channel 23 of the connecting shaft 2 described above.

Referring to fig. 1 to 4 and referring to fig. 9, the cooling liquid enters the eighth channel 4001 from the first liquid inlet channel 22, enters the seventh channel 4000 from the eighth channel 4001, enters the liquid separating channel 413 from the seventh channel 4000, enters the upper cooling channel 412 and the lower cooling channel 415 from the liquid separating channel 413, performs heat exchange with the upper and lower surfaces of the ten magnetic steels 41, finally enters the concave portion 404 from the upper cooling channel 412, enters the ninth channel 4010 from the concave portion 404, enters the tenth channel 4011 from the ninth channel 4010, and finally enters the first liquid outlet channel 23 of the connecting shaft 2.

As an example, referring to fig. 1 to 3, when the above-described bottom wall 303 (i.e., the broken line D in fig. 1) of the chamber 30 of the turning device 3 located far from the end cap 1 is located on a plane (i.e., the broken line E in fig. 1) where the seventh passage 4000 is located near to the inner top wall 4002 of the end cap 1 and a plane (i.e., the broken line E in fig. 1) where the ninth passage 4010 is located near to the inner top wall of the end cap 1 in a direction (i.e., the broken line E' in fig. 1) in which the chamber 30 is located far from the end cap 1, the first liquid inlet of the first connecting portion 27 includes the first passage 220 and the second passage 221, the first passage 220 extends in the radial direction (i.e., the Y direction shown in fig. 2), the second passage 221 extends in the axial direction (i.e., the X direction shown in fig. 2), one end of the first passage 220 communicates with the above-described third liquid inlet passage 340, and the other end of the first passage 220 communicates with one end of the second passage 221, and the other end of the second passage 221 communicates with the above-described eighth passage 4001.

Illustratively, the first liquid outlet channel 23 includes a fourth channel 230 and a fifth channel 231, the fourth channel 230 extends in a radial direction, the fifth channel 231 extends in an axial direction, one end of the fourth channel 230 communicates with the third liquid outlet channel 25 described above, the other end of the fourth channel 230 communicates with one end of the fifth channel 231, and the other end of the fifth channel 231 communicates with the other end of the tenth channel 4011 described above.

At this time, referring to fig. 1 to 4 in combination with fig. 9, the entire flow direction of the cooling liquid is from the water inlet 10 to the chamber 30 through the connecting pipe 32, then from the chamber 30 to the ten liquid inlet through holes 302, respectively, to the corresponding third liquid inlet channel 340, then to the corresponding first liquid inlet channel 22, in the first liquid inlet channel 22, from the first channel 220 to the second channel 221, then to the second liquid inlet channel 400, in the second liquid inlet channel 400, from the eighth channel 4001 to the seventh channel 4000, then to the liquid dividing channel 413, from the liquid dividing channel 413 to the upper cooling channel 412 and the lower cooling channel 415 of the two adjacent magnetic steels 41, after absorbing heat from the upper and lower surfaces of the ten magnetic steels 41, from the upper cooling channel 412 and the lower cooling channel 415 to the concave portion 404, then to the fourth liquid outlet channel 401, in the fourth liquid outlet channel 401, from the ninth channel 4010 to the tenth channel 4011, then to the first liquid outlet channel 23, in the first liquid outlet channel 23, from the fifth channel 231 to the fourth channel 230, and finally to the third liquid outlet channel 25, and from the third liquid outlet channel 11.

Or the connecting shaft comprises a second body part and a second connecting part, the second body part extends along the axial direction and is provided with an accommodating cavity extending along the axial direction, a first liquid inlet channel extending along the radial direction and a first liquid outlet channel extending along the radial direction, the first liquid inlet channel and the first liquid outlet channel are arranged at intervals along the circumferential direction of the accommodating cavity, and the second connecting part surrounds the second body part along the circumferential direction and extends along the radial direction.

As an example, referring to fig. 1 and 1a in combination with fig. 1b, in the axial direction and away from the end cap 1 (i.e., the a direction shown in fig. 1), when the plane of the bottom wall 303 of the chamber 30 of the rotary device 3 at the end far from the end cap 1 is the same as the plane of the inner bottom wall 4003 of the second liquid inlet channel 400 at the end near the end cap 1 (i.e., the broken line F shown in fig. 1 a) and the plane of the inner bottom wall 4013 of the fourth liquid outlet channel 401 at the end near the end cap 1 (i.e., the broken line F shown in fig. 1 a), in combination with fig. 1b, the first liquid inlet channel of the second body portion includes the third channel 222, the third channel 222 may extend in the radial direction (the Y direction shown in fig. 1 b), and the second liquid inlet channel 400 may also be configured to include only a seventh channel 4000 extending in the radial direction (the Y direction shown in fig. 1 b), one end of the third channel 222 communicates with the other end of the third liquid inlet channel 340, and the other end of the seventh channel 4000 communicates with the other end of the third channel 4000.

At this time, referring to fig. 1 to 4 in combination with fig. 9, the overall flow direction of the cooling liquid is: the water enters the chamber 30 from the water inlet 10 through the connecting pipe 32, flows from the chamber 30 to the ten liquid inlet through holes 302 respectively to the corresponding third liquid inlet channels 340, then flows to the corresponding first liquid inlet channel 22, namely to the third channel 222, then flows to the second liquid inlet channel 400, namely to the seventh channel 4000, then flows to the liquid separating channel 413, flows from the liquid separating channel 413 to the upper cooling channels 412 and the lower cooling channels 415 of the two adjacent magnetic steels 41, absorbs heat of the upper surfaces and the lower surfaces of the ten magnetic steels 41, flows from the upper cooling channels 412 and the lower cooling channels 415 to the concave parts 404, flows to the fourth liquid outlet channel 401, namely to the ninth channel 4010, then flows to the first liquid outlet channel 23, and flows in the first liquid outlet channel 23, namely to the sixth channel 232, then flows to the third liquid outlet channel 25, and finally flows from the second liquid outlet channel 24 to the water outlet 11.

While the utility model has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a further detailed description of the utility model with reference to specific embodiments, and it is not intended to limit the practice of the utility model to those descriptions. Various changes in form and detail may be made therein by those skilled in the art, including a few simple inferences or alternatives, without departing from the spirit and scope of the present utility model.

Claims

1. A rotor shaft assembly, comprising: an end cover, a connecting shaft and a rotary device, wherein,

2. The rotor shaft assembly of claim 1 wherein the connecting shaft comprises a body portion extending in the axial direction and defining the receiving cavity, and a connecting portion circumferentially surrounding the body portion and extending in the radial direction, the connecting portion defining the first liquid inlet passage and the first liquid outlet passage.

3. The rotor shaft assembly of claim 2 wherein the first liquid inlet passage comprises a first passage extending in the radial direction and a second passage extending in the axial direction, one end of the first passage communicating with the chamber and the other end of the first passage communicating with one end of the second passage.

4. The rotor shaft assembly as claimed in claim 2, wherein the first liquid outlet passage includes a fourth passage extending in the radial direction and a fifth passage extending in the axial direction, one end of the fourth passage communicating with the third liquid outlet passage, the other end of the fourth passage communicating with one end of the fifth passage.

5. The rotor shaft assembly of claim 1 wherein the connecting shaft includes a body portion extending in the axial direction and defining the receiving chamber, the first liquid inlet passage extending in the radial direction, and the first liquid outlet passage extending in the radial direction, the first liquid inlet passage and the first liquid outlet passage being disposed at intervals along a circumference of the receiving chamber, and a connecting portion surrounding the body portion in the circumferential direction and extending in the radial direction.

6. The rotor shaft assembly as claimed in claim 5, wherein the first feed passage includes a third passage extending in the radial direction, an end of the third passage communicating with the chamber.

7. The rotor shaft assembly as claimed in claim 5, wherein the first liquid outlet passage includes a sixth passage extending in the radial direction, an end of the sixth passage communicating with the third liquid outlet passage.

8. The rotor shaft assembly of claim 1 wherein a second seal is disposed between the swivel device and the connecting tube, the second seal being disposed within the swivel device and forming the chamber with the swivel device, the second seal encircling an end of the connecting tube remote from the water inlet.

9. The rotor shaft assembly of claim 1 wherein the swivel means comprises a plurality of fluid inlets circumferentially spaced along the outer wall of the chamber, the fluid inlets communicating with the chamber and the first fluid inlet passage.

10. The rotor shaft assembly of claim 9 wherein the fluid outlet slot includes a plurality of fluid outlet slots spaced apart along the circumferential direction, the fluid outlet slots being spaced apart from the fluid inlet along the outer wall of the chamber along the circumferential direction, the fluid outlet slots extending in the axial direction and being in communication with the first fluid outlet channel.

11. The rotor shaft assembly of claim 1 wherein an end of the swivel device remote from the end cap is provided with attachment holes circumferentially spaced along the swivel device for attachment to the connecting shaft.

12. An axial electric machine comprising a rotor disc and a rotor shaft assembly according to any one of claims 1 to 11, said rotor disc circumferentially surrounding at least part of said connecting shaft, said rotor disc being provided with cooling lines circumferentially spaced apart, at least part of said cooling lines being in communication with said first inlet channel and at least another part of said cooling lines being in communication with said first outlet channel.

13. The axial motor of claim 12, wherein the cooling line includes a second liquid inlet passage and a fourth liquid outlet passage, the second liquid inlet passage includes a seventh passage extending in the radial direction and an eighth passage extending in the axial direction, one end of the seventh passage communicates with one end of the eighth passage, the other end of the eighth passage communicates with the first liquid inlet passage, the fourth liquid outlet passage includes a ninth passage extending in the radial direction and a tenth passage extending in the axial direction, one end of the ninth passage communicates with one end of the tenth passage, the other end of the tenth passage communicates with the first liquid outlet passage, and a plane in which a bottom wall of the chamber remote from one end of the end cap in the axial direction is not lower than a plane in which an inner top wall of the seventh passage near one end of the end cap and a plane in which an inner top wall of the ninth passage near one end of the end cap is located.

14. The axial motor of claim 12, wherein the cooling line includes a second liquid inlet channel extending in the radial direction and a fourth liquid outlet channel extending in the radial direction, the second liquid inlet channel and the fourth liquid outlet channel being disposed at intervals in the circumferential direction, the second liquid inlet channel being in communication with the first liquid inlet channel, the fourth liquid outlet channel being in communication with the first liquid outlet channel, a plane in which a bottom wall of the chamber at an end far from the end cap is in the same plane as a plane in which an inner bottom wall of the second liquid inlet channel at an end near to the end cap is in the axial direction and a plane in which an inner bottom wall of the fourth liquid outlet channel at an end near to the end cap is in the same plane.