CN216904519U

CN216904519U - Superconducting motor's shell structure and superconducting motor

Info

Publication number: CN216904519U
Application number: CN202123251865.XU
Authority: CN
Inventors: 包颖; 袁文; 迮建军; 蔡渊
Original assignee: Suzhou Advanced Materials Research Institute Co ltd; Eastern Superconductor Science & Technology Suzhou Co ltd
Current assignee: Suzhou Advanced Materials Research Institute Co ltd; Eastern Superconductor Science & Technology Suzhou Co ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2022-07-05
Anticipated expiration: 2031-12-22

Abstract

The utility model discloses a shell structure of a superconducting motor and the superconducting motor, wherein the shell structure comprises a shell, a storage cavity for filling heat-absorbing media is arranged in the outer wall of the shell, a plurality of heat dissipation convex parts which are radially and inwards protruded and extended are arranged on the inner peripheral wall of the shell along the circumferential direction, a hollow part is arranged in each heat dissipation convex part, the hollow part forms one part of the storage cavity, and the heat dissipation convex parts are attached to a stator of the superconducting motor. The heat dissipation convex part is arranged on the inner peripheral wall of the shell, the storage cavity of the heat absorbing medium is designed in the outer wall of the shell, the heat dissipation convex part is attached to the stator, heat generated by the stator is absorbed by the heat absorbing medium in the storage cavity and is dissipated out in an overflowing mode, the temperature of the superconducting motor is reduced, and heat loss is reduced.

Description

Superconducting motor's shell structure and superconducting motor

Technical Field

The utility model belongs to the field of superconduction, and particularly relates to a shell structure of a superconducting motor and the superconducting motor.

Background

The superconducting motor is a motor which is made of a superconducting material for an excitation winding and is wound by a lead wire capable of bearing high-density current in a strong magnetic field, and the superconducting motor can pass strong current on a lead wire which is not thick by utilizing the characteristic that the resistance of the superconducting material is zero in a low-temperature environment so as to generate a strong magnetic field, namely a superconducting magnet.

The superconducting motor is an electromagnetic device for realizing electric energy conversion or transmission according to the law of electromagnetic induction, and in the working process of the motor, a superconducting winding maintains a superconducting zero-resistance state and needs to work in a low-temperature environment lower than the critical temperature. Meanwhile, in the rotating motion operation of the motor rotor, the temperature of the motor can be raised due to eddy current generated by electromagnetic coupling and heat leakage of the low-temperature container, so that the temperature can be maintained by taking away heat in the motor through a low-temperature medium, and the aim of enabling the superconducting winding in the superconducting motor to work in a superconducting state is fulfilled.

When an existing superconducting motor works, a part of energy is converted into heat, the temperature can be lowered through liquid nitrogen at the moment to further meet the requirement of zero resistance, but the heat generated by a stator winding is difficult to overflow and disperse, consumption exists, and the internal temperature of the motor is easy to rise. Most superconducting motor all improves the stator now for the heat that stator winding produced spills, but motor inner structure is limited, has seted up the stator winding trompil on the stator, if set up liquid cooling hole again or increase liquid cooling structure, must produce certain influence to stator structure, and the stator design is inside in the shell moreover, and the radiating effect is also not good, consequently, it is necessary to carry out optimal design to shell structure, with the heat that stator winding produced spills.

SUMMERY OF THE UTILITY MODEL

In view of the above technical problems, the present invention aims to: the shell structure of the superconducting motor and the superconducting motor are provided, the heat dissipation convex part is arranged on the inner peripheral wall of the shell, the storage cavity of a heat absorbing medium is designed in the outer wall of the shell, the heat dissipation convex part is attached to the stator, heat generated by the stator is absorbed by the heat absorbing medium in the storage cavity and is dissipated out in an overflowing mode, the temperature of the superconducting motor is reduced, and heat loss is reduced.

The technical scheme of the utility model is as follows:

one of the objects of the present invention is to provide a casing structure of a superconducting motor, including:

the heat dissipation device comprises a shell, wherein a storage cavity for filling heat absorption media is arranged in the outer wall of the shell, a plurality of heat dissipation convex parts which are radially and inwards protruded and extended are arranged on the inner circumferential wall of the shell along the circumferential direction, a hollow part is arranged in each heat dissipation convex part and forms a part of the storage cavity, and the heat dissipation convex parts are attached to a stator of the superconducting motor.

It is a further object of the present invention to provide a superconducting electrical machine comprising said housing structure and a stator and a rotor arranged within said housing structure.

Compared with the prior art, the utility model has the advantages that:

according to the shell structure of the superconducting motor, the heat dissipation convex parts are arranged on the inner peripheral wall of the shell, the storage cavity of the heat absorbing medium is designed in the outer wall of the shell, the heat dissipation convex parts are attached to the stator, heat generated by the stator is absorbed by the heat absorbing medium in the storage cavity and is dissipated, the temperature of the superconducting motor is reduced, and heat loss is reduced.

Drawings

The utility model is further described with reference to the following figures and examples:

FIG. 1 is a schematic structural view of a housing structure (with front, rear, and protective covers omitted) according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of the housing structure of FIG. 1 at A;

FIG. 3 is a cross-sectional structural schematic view of the housing structure of FIG. 1;

fig. 4 is an exploded view schematically illustrating a superconducting motor according to an embodiment of the present invention.

Wherein: 1. a housing; 11. a housing body; 110. a heat dissipating projection; 111. a storage chamber; 112. a liquid injection hole; 113. a liquid outlet hole; 12. a front sealing cover; 13. a rear sealing cover; 14. a protective cover; 2. a rotor; 21. an inner rotor; 22. an outer rotor; 3. a stator; 31. a stator winding; 4. and a bearing.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It is to be understood that these descriptions are only illustrative and are not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

The embodiment is as follows:

referring to fig. 1 to 4, a housing structure according to an embodiment of the present invention includes a housing 1, a storage cavity 111 for filling a heat absorbing medium is disposed in an outer wall of the housing 1, a plurality of heat dissipating protrusions 110 protruding and extending radially inward are disposed on an inner circumferential wall of the housing 1 along a circumferential direction, a hollow portion is disposed in the heat dissipating protrusions 110, and the hollow portion forms a part of the storage cavity 111, that is, the hollow portion of the heat dissipating protrusion 110 and a hollow cavity in the outer wall form the storage cavity 111 together. The heat dissipation convex part 110 is attached to the stator 3 in the superconducting motor, so that when the winding of the stator 3 generates heat, the heat is transferred to the shell structure, the shell structure absorbs the part of the heat by using a heat absorption medium in a storage cavity 111 arranged on the shell structure, and the shell structure is communicated with the outside, so that the heat can be dissipated into the air, and the consumption is reduced. Storage chamber 111 is set up through the inboard at heat dissipation convex part 110, makes the heat-absorbing medium of storing chamber 111 inside laminate more on heat dissipation convex part 110's inner wall, makes heat dissipation convex part 110's temperature reduce relatively, also be the stator 3 contact back when heat dissipation convex part 110 and the object that generates heat, can make heat dissipation convex part 110 exert better heat absorption performance, improves the thermal diffusivity of the object that generates heat, avoids the object rapid heating up that generates heat.

According to some preferred embodiments of the present invention, the heat-dissipating protrusion 110 is fitted on the outer circumferential wall of the stator 3. The outer peripheral wall of the stator 3 is provided with a plurality of radially inwardly recessed engaging portions or engaging portions at intervals along the circumferential direction, and the heat dissipating protrusions 110 are embedded in the engaging portions or engaged with the engaging portions to achieve contact between the stator 3 and the housing, so as to conduct heat. Specifically, as shown in fig. 2, the heat-dissipating protrusion 110 is a heat sink having an inner end in a triangular shape, and the fitting portion is a groove having a shape matching the heat-dissipating protrusion 110. As an alternative embodiment, the heat dissipating protrusion 110 may have another shape such as a T-shaped structure, and the engaging portion may be a matching T-shaped slot. Preferably, in the present embodiment, the heat dissipating protrusions 110 are equiangularly, that is, uniformly distributed on the inner circumferential wall of the housing 1, and correspondingly, the fitting portions or the engaging portions are also uniformly distributed on the outer circumferential wall of the stator 3. The contact area between the stator 3 and the outside can be increased by providing the plurality of heat-dissipating projections 110 and the fitting portions or the engaging portions, and the heat loss can be reduced by controlling the temperature rise speed of the stator 3 by the cooperation of the heat-dissipating projections 110 and the fitting portions or the engaging portions.

According to some preferred embodiments of the present invention, as shown in fig. 1 and 3, the outer wall of the casing 1 is provided with a liquid injection hole 112 and a liquid outlet hole 113 communicating with the storage chamber 111, and sealing plugs, such as screw-connected sealing plugs, are connected in the liquid injection hole 112 and the liquid outlet hole 113, so as to facilitate installation and disassembly. As an alternative embodiment, the sealing plugs can be directly press-fitted into the liquid inlet 112 and the liquid outlet 113. Preferably, the liquid injection hole 112 is formed at the top of the casing 1, and the liquid outlet hole 113 is formed at the bottom of the casing 1. The heat absorbing medium is injected into the storage cavity 111 formed in the shell through the liquid injection hole 112, after the injection is completed, the storage cavity 111 can be sealed through the sealing plug, after the temperature of the medium stored in the storage cavity 111 rises, the medium in the storage cavity 111 can be discharged out through opening the liquid injection hole 113, and meanwhile, the liquid injection hole 112 and the position of the liquid injection hole 113 are arranged, so that the superconducting motor can also fill and discharge the medium in operation.

According to some preferred embodiments of the present invention, the heat-dissipating protrusion 110 is of a unitary structure with the housing. The processing and molding are convenient, the sealing performance of the storage cavity 111 is ensured, and the volatilization of the liquid heat-absorbing medium is avoided.

According to some preferred embodiments of the present invention, the length of the heat-dissipating protrusion 110 coincides with the length of the stator 3. The heat dissipation performance is ensured without increasing the structural size of the heat dissipation convex part 110, and the production cost can be reduced.

According to some preferred embodiments of the present invention, in order to further increase the contact area between the outer shell structure and the outside, a plurality of heat dissipation fin structures are further disposed on the outer peripheral wall of the housing 1.

The embodiment of the utility model also provides a superconducting motor, as shown in fig. 1 to 4, which comprises the housing structure of the embodiment, and a stator 3 and a rotor 2 which are arranged in the housing structure. Rotor 2 installs in the shell structure, and stator 3 is located between rotor 2 and the shell structure, and stator 3 is inside to be equipped with the stator 3 winding.

As shown in fig. 1, 3 and 4, the housing 1 includes a housing body 11 which is hollow inside and open at both axial ends, and a front seal cover 12 and a rear seal cover 13 which are disposed at both axial ends of the housing body 11, the rotor 2 includes an inner rotor 21 with a large middle diameter and an outer rotor 22 with a small end diameter, and the outer rotor 22 penetrates through the front seal cover 12 and the rear seal cover 13 respectively and is engaged with each other through the bearing 4. Note that the front seal cover 12 and the rear seal cover 13 are connected to the case body 11 by bolts. A protective cover 14 is arranged on the outer side of the rear sealing cover 13, and the protective cover 14 and the shell are fixed through bolts.

According to some preferred embodiments of the present invention, the inner rotor 21 is hollow to form an inner liquid storage cavity, the outer rotor 22 and the inner rotor 21 are integrally structured, wherein a liquid delivery channel communicated with the inner liquid storage cavity is hollow formed inside the outer rotor 22 at the rear end of the superconducting motor, and a valve is arranged at the end of the liquid delivery channel, i.e. at the right end of the outer rotor 22, and the valve is located in the protective cover 14. Liquid nitrogen is stored in the inner liquid storage cavity, so that the high-temperature superconductor on the surface of the inner rotor 21 reaches a proper temperature, and the inner rotor 21 has superconducting performance. The length of interior stock solution chamber is unanimous with the length of stator in this embodiment, and the length of interior stock solution chamber is close the length of inner rotor as far as possible for interior stock solution chamber can store more liquid nitrogen, reduces the number of times of changing the liquid nitrogen, and in addition, through the design of infusion passageway and valve, when the outer rotor is rotatory, the valve is followed rotatoryly, but the position of the exit end of valve can not change, can conveniently carry out the change of liquid nitrogen in the use.

The directions given in the present embodiment are merely for convenience of describing positional relationships between the respective members and the relationship of fitting with each other. The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.

Claims

1. A shell structure of a superconducting motor, comprising:

2. The casing structure of a superconducting motor according to claim 1, wherein the heat-dissipating projection is fitted or engaged with an outer peripheral wall of the stator.

3. The casing structure of a superconducting motor according to claim 2, wherein the outer peripheral wall of the stator is provided with a plurality of radially inwardly recessed engaging portions or engaging portions at intervals in the circumferential direction, and the heat dissipating projections are engaged with the engaging portions or engaged with the engaging portions.

4. The casing structure of a superconducting electrical machine according to claim 1, wherein the heat-dissipating projections are equiangularly distributed on an inner peripheral wall of the casing.

5. A casing structure of a superconducting electrical machine according to claim 1, wherein a liquid injection hole communicating with the storage chamber is further opened on an outer wall of the casing, and a sealing plug is connected in the liquid injection hole.

6. A shell structure of a superconducting motor according to claim 5, wherein a liquid outlet hole communicated with the storage cavity is further formed in the outer wall of the shell, and a sealing plug is connected in the liquid outlet hole.

7. The casing structure of a superconducting motor according to claim 1, wherein the heat-dissipating projection is of an integral structure with the casing.

8. The casing structure of a superconducting motor according to claim 1, wherein the length of the heat-dissipating projection coincides with the length of the stator.

9. A superconducting electrical machine comprising a housing structure according to any one of claims 1 to 8 and a stator and rotor disposed within the housing structure.

10. A superconducting electrical machine according to claim 9, wherein the containment structure comprises a central, internally hollow shell body and end caps attached to the ends of the shell body.