阅读说明：本技术 一种具有限位结构的高功率密度的超导电机 (High-power-density superconducting motor with limiting structure ) 是由 包颖 杨柳春 张旭明 袁文 蔡渊 迮建军 于 2020-07-29 设计创作，主要内容包括：本发明公开了一种具有限位结构的高功率密度的超导电机,包括机壳、定子、转子、循环冷却机构、转子限定机构和定子限定机构；所述机壳内部设置有定子；所述定子内部设置有转动的转子；所述壳体前端的密封板将定子和转子封在壳体内部；所述机壳内设置有循环冷却机构；所述壳体前端的密封板和机壳的后端盖上设置有转子限定机构；所述定子的两端设置有定子限定机构。本案结构使定子铁芯成稳定角度安装固定在机壳内且使转子和定子铁芯保持相对位置不变；循环冷却机构在确保转子励磁绕组工作于超导励磁绕组温区的同时又使得定子具有较低的温度和较高的线电流密度,进一步提高了超导电机的功率密度。(The invention discloses a high-power-density superconducting motor with a limiting structure, which comprises a shell, a stator, a rotor, a circulating cooling mechanism, a rotor limiting mechanism and a stator limiting mechanism, wherein the shell is provided with a plurality of slots; a stator is arranged in the shell; a rotating rotor is arranged in the stator; the sealing plate at the front end of the shell seals the stator and the rotor in the shell; a circulating cooling mechanism is arranged in the shell; a sealing plate at the front end of the shell and a rear end cover of the shell are provided with rotor limiting mechanisms; and stator limiting mechanisms are arranged at two ends of the stator. The structure of the scheme ensures that the stator core is installed and fixed in the shell at a stable angle and the relative positions of the rotor and the stator core are kept unchanged; the circulating cooling mechanism ensures that the rotor excitation winding works in a superconducting excitation winding temperature zone, and simultaneously ensures that the stator has lower temperature and higher line current density, thereby further improving the power density of the superconducting motor.)

1. The utility model provides a high power density's superconducting motor with limit structure which characterized in that: the motor comprises a machine shell (1), a stator (2), a rotor (3), a circulating cooling mechanism (7), a rotor limiting mechanism (8) and a stator limiting mechanism (9); a stator (2) is arranged in the shell (1); a rotating rotor (3) is arranged in the stator (2); a sealing plate (4) at the front end of the shell (1) seals the stator (2) and the rotor (3) in the shell (1); a circulating cooling mechanism (7) is arranged in the machine shell (1); a rotor limiting mechanism (8) is arranged on a sealing plate (4) at the front end of the shell (1) and a rear end cover (5) of the shell (1); stator limiting mechanisms (9) are arranged at two ends of the stator (2);

the stator (2) comprises a stator core (201) with a plurality of tooth slots and a stator winding (202) wound on the stator core (201);

the rotor (3) includes a rotor core (301) having a central axis (303) and a rotor winding (302) formed of a superconducting material wound around the rotor core (301).

2. A high power density superconducting motor having a position limiting structure according to claim 1, wherein: the circulating cooling mechanism (7) comprises a stator cooling circulating device and a rotor cooling device; the stator cooling circulating device comprises a stator cooling medium injection pipe (701), a stator cooling medium injection port (702), a stator cooling medium circulating pipeline (703), a stator cooling medium output port (704) and a stator cooling medium output pipe (705); the rotor cooling device comprises a rotor isolation sleeve (706), a rotor cooling medium input pipe (707) and a rotor cooling medium output pipe (708); a stator cooling medium injection pipe (701) and a stator cooling medium output pipe (705) are arranged at the upper end of the machine shell (1), a stator cooling medium injection port (702) and a stator cooling medium output port (704) are formed in the stator iron core (201), and a stator cooling medium circulating pipeline (703) is arranged on the stator iron core (201); the stator cooling medium injection port (702) is connected with the stator cooling medium output port (704) through a stator cooling medium circulating pipeline (703), the stator cooling medium injection pipe (701) is connected with the stator cooling medium injection port (702), and the stator cooling medium output pipe (705) is connected with the stator cooling medium output port (704); the rotor isolation sleeve (706) is arranged between the rotor (3) and the stator (2) and isolates the rotor cooling medium; the rotor cooling medium input pipe (707) is communicated with one end of the rotor isolation sleeve (706) and inputs the rotor cooling medium into the rotor isolation sleeve (706); the rotor cooling medium output pipe (708) is communicated with the other end of the rotor isolation sleeve (706) and outputs the rotor cooling medium from the inside (706) of the rotor isolation sleeve; the rotor cooling medium output pipe (708) is connected with the stator cooling medium injection pipe (701) through an external pipeline.

3. A high power density superconducting motor having a position limiting structure according to claim 2, wherein: the stator cooling medium circulating pipeline (703) is annularly embedded into the pipe wall of the stator core (201); a rotor cooling medium input pipe (707) is arranged in the center of the rear end of the central shaft (303) of the rotor (3); a rotor cooling medium input hole (709) is formed in a central shaft (303) at the rear end of the position close to the rotor iron core (201); the rotor cooling medium input hole (709) is communicated with a rotor cooling medium input pipe (707); a rotor cooling medium output pipe (708) is arranged in the center of the front end of a central shaft (303) of the rotor (3); a rotor cooling medium output hole (7010) is formed in a central shaft (303) at the front end of the position close to the rotor iron core (201); the rotor cooling medium output hole (7010) is communicated with a rotor cooling medium output pipe (708).

4. A high power density superconducting motor having a position limiting structure according to claim 1, wherein: the rotor limiting mechanism (8) comprises a rotor limiting ring (801), a rotor rear limiting groove (802), a rotor rear limiting through hole (803), a rotor front limiting through hole (804) and a rotor front limiting groove (805), and the limiting ring (801) is arranged in the position, close to the rear end cover (4), of the interior of the machine shell (1); a rotor rear limiting groove (802) is formed in the center of the inner side face of the limiting ring (801); a rotor rear limiting through hole (803) is formed in the center of the limiting ring (801) in a penetrating mode; a rotor front limiting groove (805) is formed in the center of the inner side of the sealing plate (5); the center of the rotor front limiting groove (805) is provided with a rotor front limiting through hole (804).

5. The high power density superconducting motor with a position limiting structure according to claim 4, wherein: the radius of the rotor rear limiting groove (802) is the same as that of the rotor front limiting groove (805).

6. A high power density superconducting motor having a position limiting structure according to claim 1 or 4, wherein: the stator limiting mechanism (9) comprises a stator rear limiting block (901), a stator front limiting hole (902), a stator rear limiting hole (903), a stator limiting frame (904) and a stator front limiting block (905); a stator rear limiting block (901) is arranged in the shell (1) at an equal angle; the front end and the rear end of the stator core (201) are respectively provided with a front stator limiting hole (902) and a rear stator limiting hole (903); a stator front limiting block (905) is arranged on one side of the stator limiting frame (904); the stator front limiting hole (902) is matched and positioned with the stator front limiting block (905).

7. A high power density superconducting motor having a position limiting structure according to claim 1, wherein: a rotor front bearing (304) is arranged at the front end of a central shaft (303) of the rotor iron core (301); and a rotor rear bearing (304) is arranged at the rear end of the central shaft (303) of the rotor iron core (301).

8. A high power density superconducting motor having a position limiting structure according to claim 1, wherein: two groups of brackets (6) are symmetrically arranged at the lower end of the machine shell (1).

9. A high power density superconducting motor having a position limiting structure according to claim 1, wherein: a plurality of groups of grooves (101) are formed in the front side face of the shell (1), and a plurality of groups of bumps (401) are arranged on the side face of the sealing plate (4); the groove (101) is matched and assembled with the bump (401).

10. A high power density superconducting motor having a position limiting structure according to claim 1, wherein: and a rotor bearing through hole (501) is formed in the center of the rear end cover (5) of the machine shell (1).

Technical Field

The invention relates to the technical field of superconducting motors, in particular to a superconducting motor which has a cooling effect and is assembled by matching a stator and a rotor.

Background

The superconducting motor is characterized in that a superconducting material is used for making an excitation winding, a lead which is made of the superconducting material and can bear high-density current in a high magnetic field is wound, the resistance of the superconducting material is zero in a low-temperature environment, and the superconducting excitation winding can pass through very strong current to generate a very strong magnetic field, namely a superconducting magnet is formed.

The superconducting motor mainly comprises a stator and a rotor, such as a high-temperature superconducting motor, which is described in patent application No. 201921931861.6, wherein the stator is provided with a stator winding, and the rotor is provided with a superconducting magnetic block; a cooling medium for maintaining the superconducting wire rod and the superconducting magnet block at a superconducting critical temperature is communicated with the interior of the motor shell, and the stator and the rotor are immersed in the cooling medium.

Disclosure of Invention

The invention aims to: the cooling capacity of the gasified cooling medium in the rotor enters the cooling circulation device of the stator through an external pipeline, and the winding of the stator can be further cooled, so that the line current density is further improved, and the power density of the motor is increased.

The technical scheme of the invention is as follows: a high-power-density superconducting motor with a limiting structure comprises a machine shell, a stator, a rotor, a circulating cooling mechanism, a rotor limiting mechanism and a stator limiting mechanism; a stator is arranged in the shell; a rotating rotor is arranged in the stator; the sealing plate at the front end of the shell seals the stator and the rotor in the shell; a circulating cooling mechanism is arranged in the shell; a sealing plate at the front end of the shell and a rear end cover of the shell are provided with rotor limiting mechanisms; stator limiting mechanisms are arranged at two ends of the stator;

the stator comprises a stator core with a plurality of tooth slots and a stator winding wound on the stator core;

the rotor includes a rotor core with a central axis and a rotor winding formed of a superconducting material wound around the rotor core.

Preferably, the circulating cooling mechanism comprises a stator cooling circulating device and a rotor cooling device; the stator cooling circulating device comprises a stator cooling medium injection pipe, a stator cooling medium injection port, a stator cooling medium circulating pipeline, a stator cooling medium output port and a stator cooling medium output pipe; the rotor cooling device comprises a rotor isolation sleeve, a rotor cooling medium input pipe and a rotor cooling medium output pipe; a stator cooling medium injection pipe and a stator cooling medium output pipe are arranged at the upper end of the shell, a stator cooling medium injection port and a stator cooling medium output port are formed in the stator core, and the stator cooling medium circulating pipeline is arranged on the stator core; the stator cooling medium injection port is connected with the stator cooling medium output port through a stator cooling medium circulating pipeline, the stator cooling medium injection pipe is connected with the stator cooling medium injection port, and the stator cooling medium output pipe is connected with the stator cooling medium output port; the rotor isolation sleeve is arranged between the rotor and the stator and isolates the rotor cooling medium; the rotor cooling medium input pipe is communicated with one end of the rotor isolation sleeve and inputs the rotor cooling medium into the rotor isolation sleeve; the rotor cooling medium output pipe is communicated with the other end of the rotor isolation sleeve and outputs the rotor cooling medium from the inside of the rotor isolation sleeve; and the rotor cooling medium output pipe is connected with the stator cooling medium injection pipe through an external pipeline.

Preferably, the stator cooling medium circulating pipeline is annularly embedded into the wall of the stator core pipe; a rotor cooling medium input pipe is arranged in the center of the rear end of the central shaft of the rotor; a rotor cooling medium input hole is formed in the central shaft at the rear end close to the rotor iron core; the rotor cooling medium input hole is communicated with the rotor cooling medium input pipe; a rotor cooling medium output pipe is arranged in the center of the front end of the central shaft of the rotor; a rotor cooling medium output hole is arranged on the central shaft at the front end close to the rotor iron core; and the rotor cooling medium output hole is communicated with the rotor cooling medium output pipe.

Preferably, the rotor limiting mechanism comprises a rotor limiting ring, a rotor rear limiting groove, a rotor rear limiting through hole, a rotor front limiting through hole and a rotor front limiting groove, and the limiting ring is arranged in the shell close to the rear end cover; the center of the inner side surface of the limiting ring is provided with a rear rotor limiting groove; the center of the limiting ring is provided with a rear limiting through hole of the rotor in a penetrating way; a rotor front limiting groove is formed in the center of the inner side of the sealing plate; and a rotor front limiting through hole is formed in the center of the rotor front limiting groove.

Preferably, the rotor rear limiting groove and the rotor front limiting groove have the same radius.

Preferably, the stator limiting mechanism comprises a stator rear limiting block, a stator front limiting hole, a stator rear limiting hole, a stator limiting frame and a stator front limiting block; a stator rear limiting block is arranged in the shell at an equal angle; the front end and the rear end of the stator core are respectively provided with a front stator limiting hole and a rear stator limiting hole; a stator front limiting block is arranged on one side of the stator limiting frame; the stator front limiting hole is matched and positioned with the stator front limiting block; and the stator rear limiting block is matched and positioned with the stator rear limiting hole.

Preferably, a rotor front bearing is arranged at the front end of a central shaft of the rotor core; a rotor rear bearing is arranged at the rear end of the central shaft of the rotor iron core; the rotor front bearing is matched and assembled with the rotor front limiting groove; and the rotor rear bearing is matched and assembled with the rotor rear limiting groove.

Preferably, two groups of brackets are symmetrically arranged at the lower end of the machine shell.

Preferably, a plurality of groups of grooves are formed in the front side surface of the shell, and a plurality of groups of bumps are arranged on the side surface of the sealing plate; the groove is matched and assembled with the lug.

Preferably, a rotor bearing through hole is formed in the center of the rear end cover of the casing.

The invention has the advantages that:

1. in the structure of the scheme, a stator core is provided with a stator rear limiting block through a rear stator limiting hole, so that the stator core is arranged and fixed in a machine base at a certain angle, the stator front limiting block arranged on one side is arranged in the stator front limiting hole by means of a stator limiting frame, and the stator core is arranged and fixed in the machine base at a stable angle by limiting the front and rear angles of the stator core;

2. the structure of the scheme is characterized in that a circulating cooling medium pump is externally connected, cooling liquid is controlled by a water pump to flow through a stator cooling medium injection pipe and then injected through a stator cooling medium injection port, the cooling liquid is uniformly distributed in a stator cooling medium circulating pipeline and flows uniformly in the stator cooling medium circulating pipeline, finally a stator cooling medium output port and a stator cooling medium output pipe are discharged, the cooling liquid is injected from the stator cooling medium injection port by utilizing the circulating water pump to form cooling liquid circulation, the material of a stator iron core is cooled, so that the stator iron core is kept not at a high temperature, the gasified cold quantity of the cooling medium in a rotor enters a cooling circulating device of the stator through an external pipeline, and therefore, the circulating cooling mechanism ensures that a rotor exciting winding works in a superconducting exciting winding temperature area and simultaneously ensures that the stator has a low temperature and a high line current density, the power density of the superconducting motor is further improved;

3. the present case structure is installed rotor rear bearing and rotor front bearing respectively through spacing groove behind rotor and the preceding spacing groove of rotor, and then utilizes stator spacing ring and closing plate to inject the position of rotor, makes rotor and stator core keep relative position unchangeable.

Drawings

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

fig. 1 is a schematic structural diagram of a high power density superconducting motor with a limiting structure according to the present disclosure;

fig. 2 is a schematic view of an assembly structure of a high power density superconducting motor with a position limiting structure according to the present disclosure;

fig. 3 is a schematic view of an assembly structure of a stator winding and a stator spacing frame of a high power density superconducting motor with a spacing structure according to the present disclosure;

FIG. 4 is another angle structure diagram of FIG. 2;

FIG. 5 is a schematic structural view of the stator of FIG. 4;

FIG. 6 is a schematic cross-sectional view of a housing, a stator core and a stator spacing frame of a high power density superconducting motor with a spacing structure according to the present disclosure;

wherein: 1. a housing; 101. a groove; 2. a stator; 201. a stator core; 202. a stator winding; 3. a rotor; 301. a rotor core; 302. a rotor winding; 303. a central shaft; 304. a rotor front bearing; 305. a rotor rear bearing; 4. a sealing plate; 401. a bump; 5. a rear end cap; 501. a rotor bearing through hole; 6. a support; 7. A circulating cooling mechanism; 701. a stator cooling medium injection pipe; 702. a stator cooling medium injection port; 703. a stator cooling medium circulation pipe; 704. a stator cooling medium outlet; 705. a stator cooling medium output pipe; 706. a rotor isolation sleeve; 707. a rotor cooling medium input pipe; 708. a rotor cooling medium output pipe; 709. a rotor cooling medium inlet hole; 7010. a rotor cooling medium output hole; 8. a rotor limiting mechanism; 801. a rotor limit ring; 802. a rotor rear limiting groove; 803. a rotor rear limiting through hole; 804. a rotor front limiting through hole; 805. a rotor front limiting groove; 9. A stator limiting mechanism; 901. a stator rear limiting block; 902. a stator front limiting hole; 903. a stator rear limiting hole; 904. a stator limiting frame; 905. the stator front defines a block.

Detailed Description