CN215772843U - Ultra-high speed motor rotor cooling structure and shaft end liquid stirring device thereof - Google Patents

Abstract

The utility model discloses a cooling structure of a super-high-speed motor rotor and a shaft end liquid stirring device thereof, which are used for cooling the super-high-speed motor rotor, wherein the cooling structure of the rotor is provided with a liquid collecting cavity, a shaft end liquid inlet pipeline, a shaft end liquid outlet pipeline, a cooling flow channel and a cooling cavity, and the cooling flow channel is radially arranged on the surfaces of two ends of a rotor body in a penetrating way and is axially arranged on the rotor body in a penetrating way; the shaft end liquid stirring device comprises a liquid stirring ring and a liquid stirring ring, the liquid stirring ring is of a circular ring structure sleeved on the rotating shaft, and the liquid stirring ring is of a protruding structure arranged on the circumferential outer surface of the liquid stirring ring. The cooling flow channel penetrates through the rotor body and is close to the surface of the rotor body, so that cooling is acted on the surface of the rotor, a cooling medium directly carries out efficient heat dissipation on the part, needing heat dissipation, of the motor rotor, and physical properties of liquid, such as liquid characteristics, pressure change after liquid gasification and condensation and the like are well utilized by ingeniously using a physical structure.

Description

Ultra-high speed motor rotor cooling structure and shaft end liquid stirring device thereof

Technical Field

The utility model belongs to the technical field of motor rotor cooling, and particularly relates to a super-high-speed motor rotor cooling structure and a shaft end liquid stirring device thereof.

Background

The motor rotor is a rotating part in the motor. The motor consists of a rotor and a stator, and is a conversion device for realizing electric energy and mechanical energy and electric energy. The rotation mode of the inner rotor of the motor is that a core body in the middle of the motor is a rotating body, the inner rotor of the motor outputs torque (indicating a motor) or receives energy (indicating a generator), when the inner rotor of the motor rotates and operates, heat is generated, and because the rotor of the motor is in a high-speed rotation state in the working process, great difficulty is brought to the cooling of the rotor, particularly for an ultra-high-speed motor.

The ultra-high speed motor has high rotating speed, high harmonic content and high heat generated by the rotor; and because the requirement of overcoming centrifugal force, the thickness of the rotor sheath, especially the carbon fiber sheath is thicker, and the heat is difficult to dissipate; therefore, the temperature of the magnetic steel is increased, and the performance of the motor is reduced or even the rotor is demagnetized. Therefore, it is very important to design an effective heat dissipation structure of the rotor.

At present, most rotors are cooled by adopting an air cooling or liquid cooling structure, and cold air or cooling liquid passes through a hollow shaft to take away heat generated by the rotors; however, the shaft hole is far away from the surface of the rotor which generates heat seriously, the heat capacity of the cooling working medium is not high, and the effect of air cooling and liquid cooling can not meet the increasing requirement of the power density of the ultra-high speed motor.

When designing a device for supplying cooling working medium to a central hole of a rotating shaft rotating at a high speed, the inventor also finds that the conventional design is mostly realized by a pump, the rotor cooling structure is designed, and the connection and arrangement of a pump valve and related pipelines are reserved, so that the overall structure is overstaffed, and the design cost and the production cost are increased.

In view of this, how to solve the problem that the conventional rotor cooling effect cannot meet the rotor heat dissipation problem of the ultra-high speed motor with the increasing power density requirement becomes a subject to be researched and solved by the present invention.

Disclosure of Invention

The utility model provides a cooling structure of a super-high-speed motor rotor, and aims to solve the problem that the existing rotor cooling effect cannot meet the rotor heat dissipation problem of a super-high-speed motor with the requirement of increasing power density, improve the heat dissipation effect of the super-high-speed motor rotor through the phase change process of a cooling working medium, and improve the safety coefficient of the rotor.

In order to achieve the above object, a first aspect of the present invention provides a cooling structure for a super-high speed motor rotor, which is used for cooling the super-high speed motor rotor, wherein the motor is provided with a cooling water jacket, the rotor includes a rotating shaft and a rotor body, the rotating shaft has a first end and a second end, and the innovation points are that:

the rotor cooling structure includes:

the two liquid collecting cavities are positioned at two ends of the rotating shaft and are communicated with each other, and cooling working media are contained in the liquid collecting cavities;

the cooling working medium stirring device comprises a shaft end liquid inlet pipeline, a first liquid outlet and a shaft end liquid stirring device, wherein the shaft end liquid inlet pipeline is positioned at the first end of the rotating shaft, a first liquid inlet is formed in the circumferential direction of the shaft end liquid inlet pipeline close to the first end of the rotating shaft, a first liquid outlet is formed in the circumferential direction of the shaft end liquid inlet pipeline far away from the first end of the rotating shaft, and the first liquid inlet of the rotating shaft is provided with the shaft end liquid stirring device used for stirring a cooling working medium in a first liquid collecting cavity into the shaft end liquid inlet pipeline;

the shaft end liquid outlet pipeline is positioned at the second end of the rotating shaft, a second liquid inlet is formed in the circumferential direction of the shaft end liquid outlet pipeline close to the second end of the rotating shaft, and a second liquid outlet is formed in the circumferential direction of the shaft end liquid inlet pipeline far away from the second end of the rotating shaft;

the cooling flow channel axially penetrates through the rotor body, annular channels at two ends converge a plurality of axial flow channels into a squirrel-cage flow channel configuration, and the cooling flow channel is respectively communicated with the first liquid outlet and the second liquid inlet;

the cooling chamber, the cooling chamber is close to cooling jacket and sets up, is cooled off the cooling working medium of cooling intracavity by the coolant liquid that the cooling jacket inner loop passed through, the cooling chamber be located the top of collecting the liquid chamber and with two collect liquid chamber between the UNICOM each other, be equipped with on the cooling chamber with the gasification passageway of second collecting the liquid chamber UNICOM, with the liquefaction passageway of first collecting the liquid chamber UNICOM.

The utility model provides a shaft end liquid stirring device, which is used for the ultra-high speed motor rotor cooling structure in the first aspect, and is characterized in that the shaft end liquid stirring device comprises:

the liquid stirring ring is of a circular ring structure sleeved on the rotating shaft, the liquid stirring ring is sleeved at the first liquid inlet of the rotating shaft, and the inner wall of the liquid stirring ring is provided with an inner notch communicated with the first liquid inlet;

stir liquid, stir liquid for setting up the protruding structure at stirring liquid ring circumference surface, be equipped with into liquid portion on stirring liquid, be equipped with the feed liquor space that can supply cooling medium to get into in the feed liquor portion, the feed liquor space forms the feed liquor opening in one side towards rotor direction of rotation, feed liquor opening and inside notch looks UNICOM, the interior wall department of feed liquor opening upper and lower side cuts open and is equipped with the lower wall face that is close to the stirring liquid ring and keeps away from the last wall face of stirring liquid ring, goes up the wall face towards rotor direction of rotation from bottom to top, forms the cooling medium who enters into in the feed liquor space when the rotor rotates and towards inside notch, the extruded structure of stirring of first feed liquor department by last wall and lower wall face between.

The utility model is explained below:

1. in the technical scheme of the cooling structure of the ultra-high speed motor rotor, the shaft end liquid inlet pipeline, the shaft end liquid outlet pipeline and the liquid collecting cavity communicated with the shaft end liquid inlet pipeline and the shaft end liquid outlet pipeline are arranged on the rotating shaft, the arranged cooling flow channel penetrates through the rotor body and is close to the surface of the rotor body, so that the cooling action is performed on the surface of the rotor, the cooling working medium directly performs efficient heat dissipation on the part, which needs heat dissipation, in the motor rotor, the cooling working medium enters the cooling flow channel from the shaft end liquid inlet pipeline in a liquid state under the high-speed rotation, the cooling working medium absorbs a large amount of heat of the rotor in the cooling flow channel and then changes into gas in a phase, the gas flows to the second end under the pressure action and enters the second liquid collecting cavity from the shaft end liquid outlet pipeline, then the gas moves upwards to the cooling cavity, the cooling water jacket on one side of the cooling cavity condenses and liquefies the gas and then flows back to the first liquid collecting cavity when encountering cold, and thereby restart the efficient cooling cycle. The utility model adopts a physical and pure mechanical structure to carry out physical heat transfer, utilizes the physical characteristics that a cooling working medium is effectively circulated by a rotor rotating at a high speed in a liquid state, takes away heat to be changed into gas and enters a cooling cavity to be condensed in a gas state, skillfully utilizes the physical structure to well utilize the fluid characteristics of the liquid, the pressure change after the liquid is gasified and condensed and the like, realizes resource saving and energy saving, avoids adopting a complex structure to finish good rotor cooling, and adopts the cooling cavity as a condensation part adjacent to a cooling water jacket to cool the cooling working medium by adopting the cooling water jacket of the motor, does not need to additionally arrange other condensation parts, has large contact area between the working medium cooling cavity and the cooling water jacket, and has good cooling effect.

2. In foretell hypervelocity motor rotor cooling structure technical scheme, rotor body is including establishing at the ascending iron core of pivot circumference, the magnet steel, sheath and end plate, the iron core cover is established in the pivot, the magnet steel is attached to the outer circumference of iron core, the outside of magnet steel sets up the sheath, the end plate is located the iron core, the both ends of magnet steel and sheath, this is one of them structure of high-speed motor rotor body, the long and thin table of structure pastes the rotor and generates heat seriously at high-speed high frequency during operation like this, consequently very need this hypervelocity motor rotor cooling structure, in order to carry out rapid cooling to the magnet steel in the table subsides rotor, cause motor performance to reduce after avoiding the magnet steel temperature to rise, the magnetic loss.

3. In the technical scheme of the cooling structure of the ultra-high speed motor rotor, a first central hole is formed at the first end of the rotating shaft and is axially arranged along the rotating shaft, two groups of radial through holes which are arranged in the front and back direction and are uniformly distributed along the circumferential direction of the rotating shaft are formed at the first central hole, the first central hole forms a shaft end liquid inlet pipeline, the radial through hole close to the first end of the rotating shaft forms a first liquid inlet, and the radial through hole far away from the first end of the rotating shaft forms a first liquid outlet; a second central hole is formed in the second end of the rotating shaft and is axially arranged along the rotating shaft, radial through holes are formed in the second central hole and are uniformly distributed along the circumferential direction of the rotating shaft, an axial through hole is formed in the second end close to the rotating shaft, the second central hole forms a shaft end liquid outlet pipeline, a second liquid inlet is formed in the radial through hole far away from the second end of the rotating shaft, and a second liquid outlet is formed in the axial through hole; the shaft end liquid inlet pipeline and the shaft end liquid inlet pipeline are arranged in the rotating shaft in such a mode, so that the rotating shaft can be processed more conveniently, the processing cost of the rotating shaft is reduced, the design of parts such as a cooling flow channel, a liquid collecting cavity and the like communicated with the shaft end liquid inlet pipeline and the shaft end liquid outlet pipeline can be more reasonable, and the rotating shaft can be cooled as well, so that the cooling effect is further improved.

4. In the technical scheme of the cooling structure of the ultra-high speed motor rotor, a plurality of uniformly distributed core slots are formed in the outer surface of the iron core along the circumferential direction of the outer surface of the iron core, the magnetic steel is attached to the outer surface of the iron core, the jacket is sleeved on the outer side of the magnetic steel, an axial cooling flow channel is formed between a single core slot and two magnetic steel side walls and the inner wall of the jacket which are adjacent to the single core slot, a plurality of axial cooling flow channels in the circumferential direction are connected in parallel, and after confluence is carried out through annular channels at two ends, a squirrel-cage flow channel structure is formed. By adopting the structure, the cooling working medium can directly flow through the part to be cooled of the rotor body, and a good cooling effect can be achieved.

5. In the technical scheme of the cooling structure of the ultra-high speed motor rotor, the end plate is provided with a radial groove corresponding to the first liquid outlet and the second liquid inlet and an annular groove corresponding to the core groove at a position facing the iron core and the magnetic steel, the radial groove is communicated with the annular groove, the annular groove is communicated with the core groove, the radial groove forms a radial channel, and the annular groove forms a circumferential annular channel.

6. In the technical scheme of the cooling structure of the ultra-high speed motor rotor, the end plate comprises an end cover plate, a liquid throwing ring, a liquid blocking ring and a baffle; the end cover plate is hermetically connected with the rotating shaft and the sheath, the radial groove is formed in the end cover plate and is provided with a shaft hole liquid inlet and a shaft hole liquid outlet; the end cover plate is provided with a liquid blocking ring at the radial outer side of the liquid outlet of the shaft hole, and the annular groove is divided into a first cavity body positioned at the radial inner side of the liquid blocking ring and a second cavity body positioned at the radial outer side of the liquid blocking ring by the liquid blocking ring; the end cover plate is provided with a liquid throwing ring at the radial inner side of the liquid outlet of the shaft hole, and the outer surface of the liquid throwing ring inclines towards the axis direction of the rotor; and a baffle for keeping the liquid level is arranged at the joint of the radial groove and the annular groove, and the baffle is a baffle arranged between the joint of the radial groove and the annular groove and towards the radial outer side. By adopting the structural design, the cooling working medium flows into the annular groove through the radial groove, and the annular groove is divided into a first cavity and a second cavity from the liquid retaining ring; the cooling working medium firstly flows into the first cavity, the inner side of the first cavity is provided with a liquid throwing ring which inclines inwards, and when the rotor rotates at a high speed, the cooling working medium is thrown to the upper right and further enters the axial cooling flow channel on the rotor body; the cooling working medium which cannot enter the axial cooling flow channel on the rotor body can be thrown into the second cavity under the action of centrifugal force, the liquid blocking ring can limit the cooling working medium to flow back to the first cavity, and meanwhile, the cooling working medium can be forced to enter the axial cooling flow channel of the rotor for the second time under the high-speed rotation of the rotor; in this configuration, the barrier acts as a liquid level hold, and prevents the cooling medium from flowing back into the radial groove. The structure can be used for better conveying the cooling working medium to the axial cooling flow channel and preventing the cooling working medium from flowing back, and when the rotor rotates at a high speed, the cooling working medium is forced to be orderly circulated from the first liquid collecting cavity, the shaft end liquid inlet pipeline, the cooling flow channel, the shaft end liquid outlet pipeline, the second liquid collecting cavity and the cooling cavity to the first liquid collecting cavity.

7. In the technical scheme of the cooling structure of the ultra-high speed motor rotor, the cooling cavity is arranged by one side clinging to the cooling water jacket or is arranged by surrounding the cooling water jacket. When the cooling cavity is arranged with one side clinging to the cooling water jacket, the water channel of the cooling water jacket flows through one side of the cooling cavity, which can satisfy the effect of the gas in the cooling cavity when being liquefied when being cooled. When the cooling cavity is surrounded by the cooling water jacket, the condensation effect is more outstanding, and the gasified cooling working medium in the cooling cavity can be liquefied more quickly, so that the liquefied cooling working medium is rapidly supplemented to the first liquid collecting cavity.

8. In the technical scheme of the rotor cooling structure of the ultra-high-speed motor, the first liquid collecting cavity and the second liquid collecting cavity are communicated through the pipeline to keep liquid level balance, so that part of non-gasified cooling media can circulate between the first liquid collecting cavity and the second liquid collecting cavity and keep liquid level balance at two ends.

9. In the technical scheme of the shaft end liquid stirring device, the shaft end liquid stirring device is arranged at the first liquid inlet of the rotating shaft, and the shaft end liquid stirring device is matched with the rotating shaft rotating at a high speed to stir the cooling working medium into the shaft end liquid inlet pipeline, so that the cooling working medium can circulate orderly between the first liquid collecting cavity, the shaft end liquid inlet pipeline, the cooling flow channel, the shaft end liquid outlet pipeline, the second liquid collecting cavity and the cooling cavity and then the first liquid collecting cavity. When the rotor rotates at a high speed, the shaft end liquid stirring device on the rotating shaft is driven to rotate at a high speed, the liquid inlet opening on one side of the liquid stirring part facing the rotating direction of the rotor is stirred in the first liquid collecting cavity and the cooling working medium is contained in the liquid inlet space, the liquid stirring part rotates at a high speed along with the rotating shaft, the cooling working medium entering the liquid inlet space can be extruded towards the inner notch and the first liquid inlet under the compression of the upper wall surface obliquely arranged from bottom to top towards the rotating direction of the rotor, and the cooling working medium can be extruded into the shaft end liquid inlet pipeline all the time by a plurality of liquid stirring parts surrounding the circumferential direction of the liquid stirring ring, so that the cooling working medium can continuously participate in cooling circulation without using an external pump valve, an external pump valve and an additional pipeline for driving the cooling working medium are not required to be arranged, the cooling structure design of the rotor of the ultra-high-speed motor is optimized, and the rotor of the ultra-high-speed motor can be relatively simple, The reasonable structure can achieve excellent heat dissipation and cooling effects, the structure of the shaft end liquid stirring device is ingenious, the liquid stirring ring arranged at the first liquid inlet of the rotating shaft can be utilized, the liquid stirring ring arranged on the liquid stirring ring and the rotating shaft rotating at high speed when the motor works, the liquid stirring power comes from the high-speed rotation of the rotating shaft, through the structural design of the liquid stirring, the cooling working medium can enter the liquid stirring ring rotating at high speed, the cooling working medium can be impacted at high speed and is extruded downwards by the upper wall surface to generate certain hydraulic pressure, the cooling working medium can be better driven to enter a cooling flow channel under certain hydraulic pressure, even if the whole circulation channel of the cooling working medium is long, under the condition of not using other external driving force, only depending on the rotation of the rotating shaft of the rotor when the motor works, the shaft end liquid stirring device can also meet the continuous and cooling working medium long channel, And (6) automatic circulation.

10. In the technical scheme of the shaft end liquid stirring device, the inner groove opening covers the first liquid inlet, and the inner groove opening is a wedge-shaped groove, so that the cooling working medium entering the liquid inlet space can enter the shaft end liquid inlet channel more smoothly; the inclination angles of the lower wall surface and the upper wall surface are consistent, and the cooling working medium can more quickly enter the shaft end liquid inlet channel from the liquid inlet space in the process of being impacted at high speed by the upper wall surface and being extruded downwards; the liquid inlet part is provided with a guide inclined plane which is inclined from bottom to top in the direction deviating from the rotation direction of the rotor at the liquid inlet opening, when the stirring liquid rotates to impact the cooling working medium, the cooling working medium enters the liquid inlet space from the lower part of the contact position of the stirring liquid ring and the stirring liquid facing the rotation direction of the rotor, after the stirring liquid is immersed in the liquid of the cooling working medium, a large amount of cooling working medium is pressed into the liquid inlet space along the same potential, and then the high rotation speed of the rotating shaft is matched, so that a large amount of liquid cooling working medium can be effectively and uninterruptedly input into the cooling circulation; the liquid stirring ring of the shaft end liquid stirring device is fixed with the rotating shaft through the matching of the heat sleeve and the rotating shaft, and the liquid stirring ring is precisely assembled on the rotating shaft by utilizing the principle of expansion with heat and contraction with cold, so that the production cost, the assembly cost and the assembly difficulty of the rotating shaft and the shaft end liquid stirring device are reduced.

11. In foretell axle head stirring liquid device technical scheme, the inner wall department of feed liquor opening left and right sides cuts open and is equipped with the guiding gutter, the guiding gutter is smooth curved surface, the inclination of guiding gutter is unanimous with the inclination of last wall, the guiding gutter can let the cooling medium better get into the feed liquor space, axle head inlet channel, the guiding gutter of smooth curved surface lets the cooling medium reduce the flow resistance, the inclination of guiding gutter can be with the inclination of last wall unanimously can be with the fluid flow of convenient cooling medium, can make again guiding gutter in the feed liquor portion, the design production of last wall and lower wall is more reasonable, it is convenient.

12. The bottom of the outer surfaces of the left side and the right side of the liquid stirring ring is connected with the liquid stirring ring through a lower connecting surface; the lower connecting surface and the upper connecting surface are smooth curved surfaces which continuously extend along the rotation direction of the rotor, and the upper connecting surface and the lower connecting surface are gradually reduced in the direction deviating from the rotation direction of the rotor; the upper surface of the stirring liquid is a flat plane, and the upper surface inclines from bottom to top in the direction departing from the rotation direction of the rotor. Through the design of above-mentioned structure, can let axle head stir liquid device in first collection liquid chamber internal pivot drive down high-speed rotation and with cooling medium mix the time, can let cooling medium can follow down and connect the face, go up and connect the face and flow to hug closely the rear of stirring liquid ring after stirring the impact of liquid, avoid near stirring liquid formation cavity of axle head stir liquid device to make the cooling medium quantity that the axle head that rotates at a high speed stirred liquid device impressed can not reduce.

13. In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; they may be mechanically coupled, directly coupled, indirectly coupled through intervening media, coupled between two elements, or coupled in any other manner that does not materially affect the operation of the device, unless otherwise specifically limited. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

14. In the present invention, the terms "upper", "lower", "inner", "outer", etc. indicate orientations or positional relationships based on orientations or positional arrangements shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

15. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Due to the application of the scheme, compared with the prior art, the utility model has the following advantages and effects:

1. the scheme of the utility model sets the shaft end liquid inlet pipeline, the shaft end liquid outlet pipeline and the liquid collecting cavity communicated with the shaft end liquid inlet pipeline and the shaft end liquid outlet pipeline on the rotor, the set cooling flow channel penetrates through the rotor body and is close to the surface of the rotor body, and the cooling cavity is arranged close to the cooling water jacket, so that the cooling action is performed on the surface of the rotor, the cooling working medium directly performs high-efficiency heat dissipation on the part, which most needs heat dissipation, in the motor rotor, the physical characteristics of the fluid property of the liquid, the pressure change after the liquid is gasified and condensed and the like are skillfully utilized by a physical structure, the resource saving and the energy saving are realized, the problem that the good bearing cooling can be completed by adopting a complex structure is avoided, the cooling cavity as the condensing part is adjacent to the cooling water jacket, the cooling water jacket of the motor is adopted to cool the cooling working medium, other condensing parts are not additionally arranged, and the contact area between the working medium cooling cavity and the cooling water jacket is large, the cooling effect is good.

2. In the scheme of the utility model, the cooling working medium has large heat absorption capacity and good heat dissipation effect during phase change gasification, the cooling effect can meet the requirement of power density of an ultra-high-speed motor, the phase-change cooling working medium is cooled to liquefy a cold medium by using the existing stator cooling water jacket structure in a self-circulation evaporation cooling mode without external power, and the structure is simpler; the cooling working medium is liquefied and then automatically flows back to the liquid collecting cavity, and then enters the cooling circulation passage through the shaft hole, a pump valve device does not need to be additionally arranged, the system cost is low, and the safety coefficient of the motor rotor is improved.

3. In the scheme of the utility model, the shaft end liquid stirring device is arranged at the first liquid inlet of the rotating shaft, so that the continuous and automatic circulation of the long cooling working medium channel can be met by the matching of the shaft end liquid stirring device and the high-speed rotation of the rotor only by the rotation of the rotating shaft of the rotor when the motor works under the condition of not using other external driving force; need not set up outside pump valve nor need design extra drive cooling working medium's pipeline promptly, the overall structure design of hypervelocity motor rotor cooling structure has been optimized, it is fairly simple to make hypervelocity motor rotor cooling structure can be used, just can reach very good heat dissipation under the reasonable structure, the cooling effect, the very ingenious of the structure also design of the axle head stirring liquid device itself, can utilize the stirring liquid ring that sets up in the first inlet port department of pivot, the setting stirs liquid and the high-speed rotatory pivot of motor during operation on the stirring liquid ring, it comes from the high-speed rotation of pivot to stir hydraulic power.

Drawings

FIG. 1 is a first schematic plan view of a cooling structure of a super-high speed motor rotor according to an embodiment of the present invention;

FIG. 2 is a schematic plan view of a cooling structure of a super high speed motor rotor according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a rotor body in a cooling structure of a super-high speed motor rotor according to an embodiment of the present invention;

FIG. 4 is a schematic perspective view of an assembly of an iron core and magnetic steel in the cooling structure of the ultra-high speed motor rotor according to the embodiment of the utility model;

FIG. 5 is a schematic plan view of an iron core in the cooling structure of the ultra-high speed motor rotor according to the embodiment of the present invention;

FIG. 6 is a first schematic view showing a positional relationship between a cooling cavity and a cooling water channel in the cooling structure of the ultra-high speed motor rotor according to the embodiment of the present invention;

FIG. 7 is a schematic diagram of a second schematic diagram of a positional relationship between a cooling cavity and a cooling water channel in the cooling structure of the ultra-high speed motor rotor according to the embodiment of the present invention;

FIG. 8 is a first schematic perspective view of an end plate in the cooling structure of the ultra-high speed motor rotor according to the embodiment of the present invention;

FIG. 9 is a second schematic perspective view of an end plate in the cooling structure of the ultra-high speed motor rotor according to the embodiment of the present invention;

FIG. 10 is a schematic plan view of an end plate in the cooling structure of the ultra-high speed motor rotor according to the embodiment of the present invention;

FIG. 11 is a schematic sectional view taken along line A-A of FIG. 10;

FIG. 12 is a perspective view of a shaft-end stirring device assembled to a rotating shaft according to an embodiment of the present invention;

FIG. 13 is a schematic plan view of a shaft-end stirring device assembled to a rotating shaft according to an embodiment of the present invention;

FIG. 14 is a schematic sectional view taken along line B-B of FIG. 13;

FIG. 15 is a side view of a shaft-end stirring device assembled to a rotating shaft according to an embodiment of the present invention;

FIG. 16 is a schematic perspective view of a shaft end liquid stirring device according to an embodiment of the present invention;

FIG. 17 is a side view of a shaft end stirring device according to an embodiment of the utility model;

FIG. 18 is a schematic cross-sectional view taken along line C-C of FIG. 17;

FIG. 19 is a front view of a shaft end stirring device according to an embodiment of the present invention;

FIG. 20 is a schematic perspective view of a liquid stirring device at the shaft end according to an embodiment of the present invention.

The drawings are shown in the following parts:

1. a rotor;

11. a rotating shaft; 111. a first end; 1110. a first central aperture; 112. a second end; 1120. a second central aperture;

12. a rotor 1 body; 121. an iron core; 1211. a core groove; 122 magnetic steel; 123. a sheath; 124. an end plate; 1241. a radial groove; 12411. a liquid inlet of the shaft hole; 12412. a shaft hole liquid outlet; 1242. an annular groove; 12421. a first cavity; 12422. a second cavity; 1243. blocking; 1244. an end cover plate; 1245 and throwing liquid ring; 12451. stirring liquid ribs; 1246 liquid stop ring;

2. a cooling water jacket; 201. cooling circulating medium in the cooling water jacket;

3. a liquid collection cavity; 31. a first liquid collection chamber 3; 32. a second liquid collection chamber 3;

4. a shaft end liquid inlet pipeline; 41. a first liquid inlet; 42. a first liquid outlet;

5. a liquid outlet pipeline at the shaft end; 51. a second liquid inlet; 52. a second liquid outlet;

6. a cooling flow channel;

7. a cooling chamber; 71. a liquefaction passage; 72. a gasification channel;

8. a liquid stirring device at the shaft end;

81. liquid stirring rings; 811. an inner notch;

82. stirring the liquid; 820. a liquid inlet part; 821. a liquid inlet space; 8211. opening a liquid inlet; 8212. a lower wall surface; 8213. an upper wall surface; 8214. a diversion trench; 822. a guide slope; 823. a lower connecting surface; 824. an upper connecting surface; 825. and (4) an upper surface.

9. Cooling the working medium; 901. a cooling medium in a gasified state; 902. cooling working medium in a liquefied state when meeting cold.

Detailed Description

The present disclosure will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the disclosure may be shown and described, and which, when modified and varied by the techniques taught herein, can be made by those skilled in the art without departing from the spirit and scope of the disclosure.

Example one

As shown in fig. 1 to 11, in an embodiment of the present invention, a cooling structure for a rotor of an ultra-high speed motor is provided, where the cooling structure is used for cooling a rotor 1 of the ultra-high speed motor, the motor is provided with a cooling water jacket 2, the rotor 1 includes a rotating shaft 11 and a rotor body 12, and the rotating shaft 11 has a first end 111 and a second end 112.

As shown in fig. 1, the rotor cooling structure according to the first embodiment of the present invention includes:

the number of the liquid collecting cavities 3 is two, the two liquid collecting cavities are respectively a first liquid collecting cavity 31 and a second liquid collecting cavity 32, the two liquid collecting cavities 3 are positioned at two ends of the rotating shaft 11 and are communicated with each other, and the liquid collecting cavities 3 are filled with cooling working media 9;

the cooling medium stirring device comprises a shaft end liquid inlet pipeline 4, wherein the shaft end liquid inlet pipeline 4 is positioned at the first end 111 of a rotating shaft 11, a first liquid inlet 41 is formed in the circumferential direction of the shaft end liquid inlet pipeline 4 close to the first end 111 of the rotating shaft 11, a first liquid outlet 42 is formed in the circumferential direction of the shaft end liquid inlet pipeline 4 far away from the first end 111 of the rotating shaft 11, and a shaft end liquid stirring device 8 for stirring a cooling medium 9 in a first liquid collecting cavity 31 into the shaft end liquid inlet pipeline 4 is arranged at the first liquid inlet 41 of the rotating shaft 11;

the shaft end liquid outlet pipeline 5 is positioned at the second end 112 of the rotating shaft 11, a second liquid inlet 51 is formed in the circumferential direction of the shaft end liquid outlet pipeline 5 close to the second end 112 of the rotating shaft 11, and a second liquid outlet 52 is formed in the circumferential direction of the shaft end liquid inlet pipeline 4 far away from the second end 112 of the rotating shaft 11;

the cooling flow passage 6 penetrates through the rotor body 12 along the axial direction, radial channels and circumferential annular channels are arranged at two ends of the rotor body 12 of the cooling flow passage 6, and the cooling flow passage 6 is respectively communicated with the first liquid outlet 42 and the second liquid inlet 51;

the cooling cavity 7 is arranged close to the cooling water jacket 2, cooling working medium 9 in the cooling cavity 7 is cooled by cooling liquid passing through the internal circulation of the cooling water jacket 2, the cooling cavity 7 is located above the liquid collecting cavities 3 and is communicated with the two liquid collecting cavities 3, and the cooling cavity 7 is provided with a gasification channel 72 communicated with the second liquid collecting cavity 32 and a liquefaction channel 71 communicated with the first liquid collecting cavity 31.

In an embodiment of the present invention, as shown in fig. 3 to 5, the rotor body 12 includes an iron core 121, a magnetic steel 122, a sheath 123, and an end plate 124, which are disposed on the circumferential direction of the rotating shaft 11, the iron core 121 is sleeved on the rotating shaft 11, the magnetic steel 122 is attached to the outer circumference of the iron core 121, the sheath 123 is disposed on the outer side of the magnetic steel 122, and the end plate 124 is located at two ends of the iron core 121, the magnetic steel 122, and the sheath 123, which is one of the structures of the high-speed motor rotor body 12, so that when the surface-mounted rotor 1 of the structure works at a high speed, the surface of the rotor 1 far away from the axis of the rotating shaft 11 generates heat seriously, and therefore a cooling structure of the super-high-speed motor rotor 1 is needed to rapidly cool the magnetic steel 122 in the surface-mounted rotor 1, so as to avoid performance reduction and magnetic loss of the motor after the temperature of the magnetic steel 122 rises.

The working process of the first embodiment of the utility model can refer to the following steps: referring to fig. 2, a phase-changeable cooling working medium 9 is introduced into the motor rotor 1, the cooling working medium 9 enters the axial and circumferential cooling flow channels 6 through the rotating shaft 11 and the left end plate 124, the cooling flow channel 6 is close to the magnetic steel 122 serving as a heating element and the surface of the rotor 1, the cooling working medium 9 absorbs a large amount of heat energy, the heat energy is gasified to generate phase change, the gas flows to the right side under the action of pressure, enters the right second liquid collecting cavity 32 through the right end plate 124 and the shaft hole, then moves up to the cooling cavity 7 on the stator cooling water jacket 2 through a preset channel, and the gas is liquefied when encountering cold and flows back to the left first liquid collecting cavity 31; and the cooling working medium 9 enters the shaft hole under the action of the shaft end stirring device, and the cooling circulation is restarted.

As shown in fig. 2, in the first embodiment of the present invention, a first central hole 1110 is formed at the first end 111 of the rotating shaft 11 and is axially disposed along the rotating shaft 11, two sets of radial through holes are formed at the first central hole 1110, the radial through holes are disposed in front of and behind the first central hole and are uniformly distributed along the circumferential direction of the rotating shaft 11, the first central hole 1110 forms a shaft end liquid inlet pipeline 4, the radial through hole close to the first end 111 of the rotating shaft 11 forms a first liquid inlet 41, and the radial through hole far from the first end 111 of the rotating shaft 11 forms a first liquid outlet 42; a second center hole 1120 which is axially arranged along the rotating shaft 11 is formed at the second end 112 of the rotating shaft 11, radial through holes which are uniformly distributed along the circumferential direction of the rotating shaft 11 are formed at the second center hole 1120, an axial through hole is formed at the second end 112 close to the rotating shaft 11, the second center hole 1120 forms a shaft end liquid outlet pipeline 5, the radial through hole far away from the second end 112 of the rotating shaft 11 forms a second liquid inlet 51, and the axial through hole forms a second liquid outlet 52; shaft end inlet conduit 4, shaft end inlet conduit 4 adopt such mode of setting up in pivot 11, can make 11 processing of pivot more convenient, reduce 11 processing costs of pivot, make with shaft end inlet conduit 4, 4 UNICOM's of shaft end inlet conduit cooling flow path 6, collection liquid chamber 3 etc. part design can be more reasonable, also can cool off 11 itself of pivot equally to this further promotes the cooling effect.

As shown in fig. 3 to 5, in the first embodiment of the present invention, a plurality of core slots 1211 uniformly distributed are formed on the outer surface of the iron core 121 along the circumferential direction, the magnetic steel 122 is attached to the area between the adjacent core slots 1211 on the outer surface of the iron core 121, the sheath 123 is sleeved on the outer side of the magnetic steel 122, and an axial cooling flow channel 6 is formed between the single core slot 1211 and the side walls of the two magnetic steels 122 adjacent to the core slot 1211 as well as the inner wall of the sheath 123. By adopting the structure, the cooling working medium 9 suitable for taking away heat can flow through the part to be cooled of the rotor body 12 as fast as possible and as much as possible, and good heat dissipation and cooling effects can be achieved without specially adopting expensive cooling working medium with high heat capacity.

As shown in fig. 2, in the first embodiment of the present invention, a radial groove 1241 corresponding to the first liquid outlet 42 and the second liquid inlet 51 and an annular groove 1242 corresponding to the core slot 1211 are formed in the end plate 124 at positions facing the iron core 121 and the magnetic steel 122, and the radial groove 1241 is communicated with the annular groove 1242; the respective radial grooves 1241 of the cover plates at both ends are respectively communicated with the first liquid outlet 42 and the second liquid outlet 52, the radial grooves 1241 form radial passages, the annular grooves 1242 form circumferential annular passages, and the annular grooves 1242 are communicated with the core 1211. The cooling working medium 9 can flow into the annular groove 1242 from the radial grooves 1241 of the radial surfaces at the two ends of the rotor body 12, and then flows into the axial cooling flow channel 6 on the circumferential surface of the rotor body 12 through the annular groove 1242, the annular groove 1242 is communicated with the plurality of core slots 1211 in the circumferential direction, so that a squirrel-cage flow channel configuration is formed in which the plurality of axial cooling flow channels 6 are connected in parallel and the annular channels converge at the two ends of the squirrel-cage flow channel configuration are respectively provided, the cooling working medium 9 flows through most of heat dissipation parts of the rotor body 12, and the cooling effect can meet the requirement of the power density of the ultra-high-speed motor.

In the first embodiment of the present invention, as shown in fig. 8 to 10, the end plate 124 includes an end cover plate 1244, a liquid throwing ring 1245, a liquid blocking ring 1246, and a baffle 1243; the end cover plate 1244 is hermetically connected with the rotating shaft 11 and the sheath 123, the radial groove 1241 is arranged on the end cover plate 1244, and the radial groove 1241 is provided with a shaft hole liquid inlet 12411 and a shaft hole liquid outlet 12412; the end cover plate 1244 is provided with a liquid blocking ring 1246 at the radial outer side of the shaft hole liquid outlet 12412, and the annular groove 1242 is divided into a first cavity 12421 located at the radial inner side of the liquid blocking ring 1246 and a second cavity 12422 located at the radial outer side of the liquid blocking ring 1246 by the liquid blocking ring 1246; the end cover plate 1244 is provided with a liquid throwing ring 1245 at the radial inner side of the shaft hole liquid outlet 12412, and the outer surface of the liquid throwing ring 1245 inclines towards the axial center direction of the rotor 1; a baffle 1243 for liquid level maintenance is arranged at the joint of the radial groove 1241 and the annular groove 1242, and the baffle 1243 is a baffle arranged radially outward between the joints of the radial groove 1241 and the annular groove 1242. By adopting the structural design, the cooling working medium 9 flows into the annular groove 1242 through the radial groove 1241, and the annular groove 1242 is divided into a first cavity 12421 and a second cavity 12422 from the liquid baffle ring 1246; the cooling working medium 9 firstly flows into the first cavity 12421, the inner side of the first cavity 12421 is provided with a liquid throwing ring 1245 which inclines inwards, and when the rotor 1 rotates at a high speed, the cooling working medium 9 is thrown to the upper right side and further enters the axial cooling flow channel 6 on the rotor body 12; the cooling working medium 9 which cannot enter the axial cooling flow channel 6 on the rotor body 12 can be brushed into the second cavity 12422 under the action of centrifugal force, the liquid blocking ring 1246 can limit the cooling working medium 9 from flowing back to the first cavity 12421, and meanwhile, the cooling working medium 9 can be forced to enter the axial cooling flow channel 6 of the rotor 1 for the second time under the high-speed rotation of the rotor 1; in this configuration, the baffle 1243 has a liquid level holding effect, and the baffle 1243 prevents the cooling medium 9 from flowing back into the radial groove 1241. The structure can be used for better conveying the cooling working medium 9 to the radial cooling flow channel 6 and preventing the cooling working medium 9 from flowing back, and when the rotor 1 rotates at a high speed, the cooling working medium 9 is forced to be orderly circulated from the first liquid collecting cavity 31, the shaft end liquid inlet pipeline 4, the cooling flow channel 6, the shaft end liquid outlet pipeline 5, the second liquid collecting cavity 32 and the cooling cavity 7 to the first liquid collecting cavity 31 all the time.

Example two

As shown in fig. 12 to 20, according to an embodiment of the present invention, there is provided an axial end stirring device 8, the axial end stirring device 8 being used in the cooling structure of the ultra-high speed motor rotor in the first aspect, the axial end stirring device 8 including:

the liquid stirring ring 81 is of a circular ring structure sleeved on the rotating shaft 11, the liquid stirring ring 81 is sleeved at the first liquid inlet 41 of the rotating shaft 11, and an inner groove opening 811 communicated with the first liquid inlet 41 is formed in the inner wall of the liquid stirring ring 81;

the liquid stirring device comprises a liquid stirring body 82, wherein the liquid stirring body 82 is a convex structure arranged on the circumferential outer surface of a liquid stirring ring 81, a liquid inlet part 820 is arranged on the liquid stirring body 82, a liquid inlet space 821 into which a cooling working medium 9 can enter is arranged on the liquid inlet part 820, a liquid inlet opening 8211 is formed in one side of the liquid inlet space 821 facing to the rotation direction of the rotor 1, the liquid inlet opening 8211 is communicated with an inner notch 811, a lower wall surface 8212 close to the liquid stirring ring 81 and an upper wall surface 8213 far away from the liquid stirring ring 81 are cut at the inner wall surface of the upper side and the lower side of the liquid inlet opening 8211, the upper wall surface 8213 inclines from bottom to top towards the rotation direction of the rotor 1, and a liquid stirring structure which extrudes the cooling working medium 9 entering the liquid inlet space 821 towards the inner notch 811 and the first liquid inlet 41 when the rotor 1 rotates is formed between the upper wall surface 8213 and the lower wall surface 8212.

The working principle of the second embodiment of the utility model is as follows: when the rotor 1 rotates at a high speed, the shaft end liquid stirring device 8 on the rotating shaft 11 is driven to rotate at a high speed, the liquid inlet opening 8211 on one side of the liquid stirring ring 82 facing the rotating direction of the rotor 1 is stirred in the first liquid collecting cavity 31 and brings the cooling working medium 9 into the liquid inlet space 821, because the liquid stirring ring 82 also rotates at a high speed along with the rotating shaft 11, the cooling working medium 9 entering the liquid inlet space 821 can be pressed towards the inner groove opening 811 and the first liquid inlet 41 under the pressure of the upper wall surface 8213 inclined from bottom to top facing the rotating direction of the rotor 1, and the plurality of liquid stirring rings 82 surrounding the liquid stirring ring 81 extrude the cooling working medium 9 into the shaft end liquid inlet pipeline 4 all the time, so that the cooling working medium 9 can continuously participate in cooling circulation without using an external pump valve.

In the second embodiment of the present invention, the inner notch 811 covers the first liquid inlet 41, and the inner notch 811 is a wedge-shaped groove, so that the cooling medium 9 entering the liquid inlet space 821 can enter the liquid inlet channel at the shaft end more smoothly; the inclination angles of the lower wall surface 8212 and the upper wall surface 8213 are consistent, and the cooling working medium 9 can enter the shaft end liquid inlet channel from the liquid inlet space 821 more quickly in the process of being impacted at high speed by the upper wall surface 8213 and being extruded downwards; the liquid inlet part 820 is provided with a guide inclined plane 822 obliquely arranged from bottom to top at the position of the liquid inlet opening 8211 deviating from the rotation direction of the rotor 1, when the stirring liquid 82 rotates to impact the cooling working medium 9, the cooling working medium 9 starts to enter the liquid inlet space 821 from the lower part of the contact position of the stirring liquid ring 81 and the stirring liquid 82 towards the rotation direction of the rotor 1, a large amount of cooling working medium 9 is pressed into the liquid inlet space 821 along with the trend after the stirring liquid 82 is immersed in the liquid of the cooling working medium 9, and the large amount of liquid cooling working medium 9 can be effectively and uninterruptedly input into the cooling circulation by matching with the high rotation speed of the rotating shaft 11; the liquid stirring ring 81 of the shaft end liquid stirring device 8 is fixed with the rotating shaft 11 through the matching of a heat sleeve, the liquid stirring ring 81 is precisely assembled on the rotating shaft 11 by utilizing the principle of expansion with heat and contraction with cold, and the production cost, the assembly cost and the assembly difficulty of the rotating shaft 11 and the shaft end liquid stirring device 8 are reduced.

In the second embodiment of the present invention, the inner walls of the left and right sides of the liquid inlet opening 8211 are cut with flow guide grooves 8214, the flow guide grooves 8214 are smooth curved surfaces, the inclination angle of the flow guide grooves 8214 is the same as the inclination angle of the upper wall surface 8213, the flow guide grooves 8214 can allow the cooling medium 9 to better enter the oil inlet space 821 and the shaft end oil inlet channel, the flow resistance of the cooling medium 9 is reduced by the flow guide grooves 8214 with the smooth curved surfaces, the inclination angle of the flow guide grooves 8214 is the same as the inclination angle of the upper wall surface 8213, so that the fluid flow of the cooling medium 9 is facilitated, and the design and production of the flow guide grooves 8214, the upper wall surface 8213 and the lower wall surface 8212 in the oil inlet portion 820 are more reasonable and convenient.

In the second embodiment of the present invention, as shown in fig. 19 and fig. 20, a lower connection surface 823 is disposed at a connection position between bottoms of outer surfaces of left and right sides of the liquid stirring body 82 and the liquid stirring ring 81, and an upper connection surface 824 is disposed from the lower connection surface 823 to an upper surface 825 of the liquid stirring body 82; the lower connecting surface 823 and the upper connecting surface 824 are smooth curved surfaces which continuously extend along the rotation direction of the rotor 1, and the upper connecting surface 823 and the upper connecting surface 824 are gradually reduced in the direction departing from the rotation direction of the rotor 1; the upper surface 825 of the whipping liquid 82 is a flat plane, and the upper surface 825 is inclined from bottom to top in a direction away from the rotation direction of the rotor 1. Through the design of above-mentioned structure, can let axle head stir liquid device 8 in first liquid collecting cavity 31 drive down high-speed rotation and will cool off working medium 9 and stir when getting up, can let cool off working medium 9 can flow to hug closely behind stirring liquid ring 81 along connecting surface 823 down, connecting surface 824 after stirring the impact of liquid 82, avoid near the cavity that forms of stirring liquid 82 at axle head stir liquid device 8, thereby make the cooling medium 9 quantity that the axle head that rotates at a high speed stirred liquid device 8 impressed not reduce.

With respect to the above embodiments, possible variations of the present invention are described below:

1. in the first embodiment, the shaft end liquid stirring device 8 may also adopt other structures besides the second embodiment, for example, a structure similar to a waterwheel structure, etc.

2. In the first embodiment, the first liquid outlet 42, the second liquid inlet 51 and the first liquid inlet 41 are all radial through holes on the rotating shaft 11, but the utility model is not limited thereto, and the first liquid outlet 42, the second liquid inlet 51 and the first liquid inlet 41 may also be through holes arranged obliquely.

3. In the first embodiment, referring to fig. 6, one side of the cooling water jacket 2 is arranged close to the cooling cavity 7, and when the cooling water jacket 2 is arranged close to the cooling cavity 7 on one side, the water channel of the cooling water jacket 2 flows through one side of the cooling cavity 7, so that the effect of liquefying gas in the cooling cavity 7 in the case of cooling can be satisfied. Referring to fig. 7, the cooling water jacket 2 is disposed around the cooling chamber 7, and when the cooling water jacket 2 is disposed around the cooling chamber 7, the water channel of the cooling water jacket 2 is disposed around the cooling chamber 7 for one circle, so that the condensation effect is more prominent, and the gasified cooling medium 9 in the cooling chamber 7 can be quickly liquefied more quickly, so that the liquefied cooling medium 9 can be quickly supplemented into the first liquid collecting chamber 31.

4. In the first embodiment, the first liquid collecting cavity 31 and the second liquid collecting cavity 32 are communicated by a pipeline to keep liquid level balance, the pipeline may be disposed below the whole motor, or may be disposed at a horizontal position slightly lower than the first liquid collecting cavity 31 and the second liquid collecting cavity 32, so that the liquid level can be kept balanced by keeping the liquid level flowing, and the utility model is not limited thereto.

5. In the first embodiment, as shown in fig. 8, 9 and 10, the liquid stirring ribs 12451 are additionally arranged on the surface of the inclined liquid throwing ring 1245, and the liquid stirring ribs 12451 correspond to the fan blades of the fan and can drive the cooling liquid; when the liquid rotates, the liquid splashes when meeting the liquid stirring ribs 12451, and the liquid is thrown into the axial cooling flow channel 6 under the action of centrifugal force.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims (12)

1. A cooling structure of a super-high speed motor rotor is used for cooling a super-high speed motor rotor (1), a cooling water jacket (2) is arranged on the motor, the rotor (1) comprises a rotating shaft (11) and a rotor body (12), the rotating shaft (11) is provided with a first end (111) and a second end (112), and the cooling structure is characterized in that:

the rotor cooling structure includes:

the number of the liquid collecting cavities (3) is two, the two liquid collecting cavities are respectively a first liquid collecting cavity (31) and a second liquid collecting cavity (32), the two liquid collecting cavities (3) are positioned at two ends of the rotating shaft (11) and are communicated with each other, and a cooling working medium (9) is contained in each liquid collecting cavity (3);

the cooling system comprises a shaft end liquid inlet pipeline (4), wherein the shaft end liquid inlet pipeline (4) is positioned at the first end (111) of a rotating shaft (11), a first liquid inlet (41) is formed in the circumferential direction of the shaft end liquid inlet pipeline (4) close to the first end (111) of the rotating shaft (11), a first liquid outlet (42) is formed in the circumferential direction of the shaft end liquid inlet pipeline (4) far away from the first end (111) of the rotating shaft (11), and a shaft end liquid stirring device (8) used for stirring a cooling working medium (9) in a first liquid collecting cavity (31) into the shaft end liquid inlet pipeline (4) is arranged at the first liquid inlet (41) of the rotating shaft (11);

the shaft end liquid outlet pipeline (5), the shaft end liquid outlet pipeline (5) is positioned at the second end (112) of the rotating shaft (11), a second liquid inlet (51) is formed in the circumferential direction, close to the second end (112) of the rotating shaft (11), of the shaft end liquid outlet pipeline (5), and a second liquid outlet (52) is formed in the circumferential direction, far away from the second end (112) of the rotating shaft (11), of the shaft end liquid outlet pipeline (5);

the cooling flow channel (6) penetrates through the rotor body (12) along the axial direction, radial channels and circumferential annular channels are arranged at two ends of the rotor body (12) of the cooling flow channel (6), and the cooling flow channel (6) is communicated with the first liquid outlet (42) and the second liquid inlet (51) respectively;

cooling chamber (7), cooling chamber (7) are close to cooling jacket (2) and set up, and coolant liquid that passes through by cooling jacket (2) inner loop cools off cooling medium (9) in cooling chamber (7), cooling chamber (7) are located the top of collecting liquid chamber (3) and with two collect liquid chamber (3) between mutual UNICOM, be equipped with on cooling chamber (7) with gasification passageway (72) of second collecting liquid chamber (32) UNICOM, with liquefaction passageway (71) of first collecting liquid chamber (31) UNICOM.

2. The cooling structure of the ultra high speed motor rotor according to claim 1, wherein: rotor body (12) are including establishing iron core (121), magnet steel (122), sheath (123) and end plate (124) in pivot (11) circumference, and iron core (121) cover is established on pivot (11), and magnet steel (122) have been attached to the outer circumference of iron core (121), and the outside of magnet steel (122) sets up sheath (123), and end plate (124) are located the both ends of iron core (121), magnet steel (122) and sheath (123).

3. The cooling structure of the ultra high speed motor rotor according to claim 2, wherein: a first center hole (1110) axially arranged along the rotating shaft (11) is formed in the first end (111) of the rotating shaft (11), two groups of radial through holes which are arranged in the front and at the back and are uniformly distributed along the circumferential direction of the rotating shaft (11) are formed in the first center hole (1110), a shaft end liquid inlet pipeline (4) is formed in the first center hole (1110), a first liquid inlet (41) is formed in the radial through hole close to the first end (111) of the rotating shaft (11), and a first liquid outlet (42) is formed in the radial through hole far away from the first end (111) of the rotating shaft (11);

second centre bore (1120) along pivot (11) axial setting are seted up in second end (112) department of pivot (11), offer along pivot (11) circumference evenly distributed's radial through-hole in second centre bore (1120), axial through-hole has been seted up in second end (112) that is close to pivot (11), second centre bore (1120) form axle head liquid outlet pipe way (5), the radial through-hole of keeping away from pivot (11) second end (112) forms second inlet (51), axial through-hole forms second liquid outlet (52).

4. The cooling structure of the ultra high speed motor rotor according to claim 2, wherein: the outer surface of the iron core (121) is provided with a plurality of uniformly distributed core slots (1211) along the annular circumference, the magnetic steel (122) is attached to the outer surface of the iron core (121), the outer side of the magnetic steel (122) is sleeved with the sheath (123), and an axial cooling flow channel (6) is formed between the single core slot (1211) and the side walls of the two magnetic steels (122) adjacent to the core slot (1211) and the inner wall of the sheath (123).

5. The cooling structure of the ultra high speed motor rotor according to claim 4, wherein: a radial groove (1241) corresponding to the first liquid outlet (42) and the second liquid inlet (51) and an annular groove (1242) corresponding to the core slot (1211) are formed in the end plate (124) at positions facing the iron core (121) and the magnetic steel (122), the radial groove (1241) is communicated with the annular groove (1242), the radial groove (1241) forms a radial channel, and the annular groove (1242) forms a circumferential annular channel; radial grooves (1241) in end plates (124) at two ends are respectively communicated with a first liquid outlet (42) and a second liquid inlet (51), and annular grooves (1242) are communicated with a plurality of core grooves (1211) in the circumferential direction, so that a squirrel-cage type flow channel configuration that a plurality of cooling flow channels (6) are axially connected in parallel and annular channels are respectively arranged at two ends of the squirrel-cage type flow channel configuration.

6. The cooling structure of the ultra high speed motor rotor according to claim 5, wherein:

the end plate (124) comprises an end cover plate (1244), a liquid throwing ring (1245), a liquid blocking ring (1246) and a baffle (1243);

the end plate (124) is connected with the rotating shaft (11) and the sheath (123) in a sealing way, a radial groove (1241) is formed in the end plate (124), and the radial groove (1241) is provided with a shaft hole liquid inlet (12411) and a shaft hole liquid outlet (12412);

the end plate (124) is provided with a liquid blocking ring (1246) at the radial outer side of the shaft hole liquid outlet (12412), and the annular groove (1242) is divided into a first cavity (12421) positioned at the radial inner side of the liquid blocking ring (1246) and a second cavity (12422) positioned at the radial outer side of the liquid blocking ring (1246) by the liquid blocking ring (1246);

the end plate (124) is provided with a liquid throwing ring (1245) at the radial inner side of the shaft hole liquid outlet (12412), and the outer surface of the liquid throwing ring (1245) inclines towards the center direction of the rotor;

a baffle (1243) used for keeping the liquid level is arranged at the joint of the radial groove (1241) and the annular groove (1242), and the baffle (1243) is a baffle arranged between the joint of the radial groove (1241) and the annular groove (1242) and towards the radial outer side.

7. The cooling structure of the ultra high speed motor rotor according to claim 1, wherein: the cooling cavity (7) is arranged by one side clinging to the cooling water jacket (2) or arranged around the cooling water jacket (2).

8. The cooling structure of the ultra high speed motor rotor according to claim 1, wherein: the first liquid collecting cavity (31) and the second liquid collecting cavity (32) are communicated through a pipeline to keep liquid level balance.

9. An axial end mixing device (8) for the ultra high speed motor rotor cooling structure as defined in any one of claims 1 to 7, wherein the axial end mixing device (8) is provided at a first liquid inlet (41) of the rotating shaft (11), and the axial end mixing device (8) comprises:

the liquid stirring ring (81) is of a circular ring structure sleeved on the rotating shaft (11), the liquid stirring ring (81) is sleeved at the first liquid inlet (41) of the rotating shaft (11), and an inner notch (811) communicated with the first liquid inlet (41) is formed in the inner wall of the liquid stirring ring (81);

stirring liquid (82), wherein the stirring liquid (82) is of a convex structure arranged on the circumferential outer surface of a liquid stirring ring (81) in a surrounding manner, a liquid inlet part (820) is arranged on the stirring liquid (82), a liquid inlet space (821) into which cooling working media (9) can enter is arranged on the liquid inlet part (820), a liquid inlet opening (8211) is formed in one side of the liquid inlet space (821) facing to the rotation direction of the rotor, the liquid inlet opening (8211) is communicated with the inner notch (811), the inner wall surface of the upper side and the lower side of the liquid inlet opening (8211) is provided with a lower wall surface (8212) close to the liquid mixing ring (81) and an upper wall surface (8213) far away from the liquid mixing ring (81), the upper wall surface (8213) inclines from bottom to top towards the rotation direction of the rotor, and a liquid mixing structure which extrudes a cooling working medium (9) entering the liquid inlet space (821) towards the inner notch (811) and the first liquid inlet (41) when the rotor rotates is formed between the upper wall surface (8213) and the lower wall surface (8212).

10. A shaft end stirring device as set forth in claim 9, wherein: the inner notch (811) covers the first liquid inlet (41), and the inner notch (811) is a wedge-shaped groove; the inclination angles of the lower wall surface (8212) and the upper wall surface (8213) are consistent; a guide inclined plane (822) is obliquely arranged on the liquid inlet part (820) at the position of the liquid inlet opening (8211) from bottom to top and deviates from the rotation direction of the rotor; the liquid stirring ring (81) is fixed with the rotating shaft (11) through hot sleeve matching.

11. A shaft end stirring device as set forth in claim 10, wherein: the inner wall department of the feed liquor opening (8211) left and right sides cuts open and is equipped with guiding gutter (8214), guiding gutter (8214) are smooth curved surface, and the inclination of guiding gutter (8214) is unanimous with the inclination of last wall (8213).

12. A shaft end stirring device as set forth in claim 9, wherein: a lower connecting surface (823) is arranged at the connecting position of the bottoms of the outer surfaces of the left side and the right side of the liquid stirring ring (82) and the liquid stirring ring (81), and an upper connecting surface (824) is arranged from the lower connecting surface (823) to the upper surface (825) of the liquid stirring ring (82); the lower connecting surface (823) and the upper connecting surface (824) are smooth curved surfaces which continuously extend along the rotation direction of the rotor, and the upper connecting surface (823) and the upper connecting surface (824) are gradually reduced in the direction departing from the rotation direction of the rotor; the upper surface (825) of the stirring liquid (82) is a flat plane, and the upper surface (825) inclines from bottom to top in the direction departing from the rotation direction of the rotor.

Images