CN216929838U

CN216929838U - High-speed bearingless permanent magnet synchronous motor

Info

Publication number: CN216929838U
Application number: CN202121304363.6U
Authority: CN
Inventors: 吴楠
Original assignee: Tianjin Yuanke Technology Development Co ltd
Current assignee: Tianjin Yuanke Technology Development Co ltd
Priority date: 2021-06-10
Filing date: 2021-06-10
Publication date: 2022-07-08
Anticipated expiration: 2031-06-10

Abstract

The utility model provides a high-speed bearingless permanent magnet synchronous motor which comprises a suspension winding, a torque control winding, a stator iron core, a machine shell and a rotor structure, wherein the stator iron core is of a hollow cylindrical structure, the rotor structure is arranged in the stator iron core, the torque control winding and the suspension winding are fixedly sleeved on the inner wall of the stator iron core from inside to outside in sequence, and the outer wall of the stator iron core is fixedly sleeved on the inner wall of the machine shell. The high-speed bearingless permanent magnet synchronous motor is simple in structure and reasonable in design, realizes a bearingless technology of a high-speed motor rotor, and is beneficial to further improving the rotating speed of the motor. And the axial length of the motor is not increased, the negative influence on the rigidity and the critical rotating speed of the rotor is avoided, the processing and the disassembly are convenient, and the motor is economical, practical and easy to popularize.

Description

High-speed bearingless permanent magnet synchronous motor

Technical Field

The utility model belongs to the technical field of motor equipment, and particularly relates to a high-speed bearingless permanent magnet synchronous motor.

Background

The high-speed motor has high rotating speed, and the circumferential linear speed can reach more than 200 m/s. The bearing is the bottleneck for limiting the further increase of the rotating speed of the high-speed motor. The traditional mechanical bearing is difficult to reach high rotating speed. Although the magnetic suspension bearing is suitable for a high-speed motor, the structure is complex, the axial length is long, the magnetic suspension bearing is arranged at two ends of the high-speed motor, the rigidity and the critical rotating speed of a rotor are reduced, the application of the magnetic suspension bearing in the high-speed motor is limited to a certain extent, and in addition, the quality of the heat dissipation condition of the high-speed motor directly determines the safe operation of the motor. Some high speed motors use oil circulation to cool the bearings, which undoubtedly increases the cost of the motor by a large amount.

Disclosure of Invention

In view of the above, the present invention is directed to a high-speed bearingless permanent magnet synchronous motor to solve the deficiencies of the prior art.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

a high-speed bearingless permanent magnet synchronous motor comprises a suspension winding, a torque control winding, a stator core, a machine shell and a rotor structure, wherein the stator core is of a hollow cylindrical structure, the rotor structure is arranged inside the stator core, the torque control winding and the suspension winding are fixedly sleeved on the inner wall of the stator core from inside to outside in sequence, and the outer wall of the stator core is fixedly sleeved on the inner wall of the machine shell.

Further, the casing includes left part and right part, and left part, right part are the ring channel structure, and left part fixed connection to right part, and the two constitutes the ring structure, is equipped with stator core in the ring structure.

Furthermore, a left opening is formed in the middle of one side of the left portion, a second left opening and a third left opening are formed in the upper side and the lower side of the left portion respectively, a first right opening is formed in the middle of one side of the right portion, a second right opening and a third right opening are formed in the upper side and the lower side of the right portion respectively, the first left opening and the first right opening form a first cold air opening, the second left opening and the second right opening form a second cold air opening, and the third left opening and the third right opening form a third cold air opening.

Furthermore, a plurality of mounting grooves are uniformly formed in the two sides of the left part, a plurality of mounting strips are uniformly formed in the two sides of the right part, and the mounting grooves and the mounting strips are matched with each other for use.

Furthermore, the stator core comprises an upper part and a lower part, the upper part and the lower part have the same structure and are both of circular structures, the outer walls of the upper part and the lower part are fixedly sleeved on the inner wall of the casing, the inner walls of the upper part and the lower part are fixedly sleeved with the torque control winding and the suspension winding in sequence from inside to outside, and an annular gap is reserved between the upper part and the lower part.

Further, the rotor structure includes rotor, sheath, pivot, No. two pivots, and rotor top fixed connection is to pivot No. one, and bottom fixed connection is to pivot No. two, and the sheath is cup jointed to the outer wall is fixed, and the one end that the one end of pivot near the rotor, No. two pivots are close to the one end of rotor all is located the sheath, and the sheath outer wall is equipped with stator core.

Compared with the prior art, the high-speed bearingless permanent magnet synchronous motor has the following advantages:

(1) the high-speed bearingless permanent magnet synchronous motor is simple in structure and reasonable in design, realizes a bearingless technology of a high-speed motor rotor, and is beneficial to further improving the rotating speed of the motor. And the axial length of the motor is not increased, the negative influence on the rigidity and the critical rotating speed of the rotor is avoided, the processing and the disassembly are convenient, and the motor is economical, practical and easy to popularize.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a cross-sectional view of the overall structure of a high-speed bearingless permanent magnet synchronous motor according to an embodiment of the utility model;

fig. 2 is a schematic view of an overall structure of a high-speed bearingless permanent magnet synchronous motor according to an embodiment of the present invention;

fig. 3 is a top view of the overall structure of a high-speed bearingless permanent magnet synchronous motor according to an embodiment of the present invention;

fig. 4 is an isometric view of an overall structure of a high-speed bearingless permanent magnet synchronous motor according to an embodiment of the present invention.

Description of reference numerals:

1. a suspension winding; 2. a torque control winding; 3. a stator core; 31. an upper portion; 32. a lower portion; 4. a housing; 41. a left portion; 411. a first left opening; 412. a second left opening; 413. a third left opening; 414. mounting grooves; 42. a right portion; 43. a first cold air port; 44. a second cold air port; 45. a third cold air port; 5. a rotor structure; 51. a rotor; 52. a sheath; 53. a second rotating shaft; 54. a first rotating shaft.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. 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," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1 to 4, a high-speed bearingless permanent magnet synchronous motor includes a suspension winding 1, a torque control winding 2, a stator core 3, a housing 4 and a rotor structure 5, the stator core 3 is a hollow cylindrical structure, the rotor structure 5 is arranged inside the stator core 3, the torque control winding 2 and the suspension winding 1 are fixedly sleeved on the inner wall of the stator core 3 from inside to outside in sequence, the outer wall of the stator core 3 is fixedly sleeved on the inner wall of the housing 4, wherein the suspension winding 1 is a 4-pole suspension winding, the suspension winding 1 can generate 4-pole rotor suspension force, the torque control winding 2 is a 2-pole torque control winding, and the torque control winding 2 is responsible for generating rotor rotation torque. And the axial length of the motor is not increased, the negative influence on the rigidity and the critical rotating speed of the rotor is avoided, the processing and the disassembly are convenient, and the motor is economical, practical and easy to popularize.

Casing 4 includes left part 41 and right part 42, and left part 41, right part 42 are the ring channel structure, and left part 41 fixed connection to right part 42, and the two constitutes the ring structure, are equipped with stator core 3 in the ring structure, and casing 4 is left part 41 and right part 42, and the staff's of not only being convenient for processes, convenient to detach moreover.

The middle part of one side of the left part 41 is provided with a first left opening 411, the upper and lower sides of the left part 41 are respectively provided with a second left opening 412 and a third left opening 413, the middle part of one side of the right part 42 is provided with a first right opening, the upper and lower sides of the right part 42 are respectively provided with a second right opening and a third right opening, the first left opening 411 and the first right opening form a first cold air opening 43, the second left opening 412 and the second right opening form a second cold air opening 44, the third left opening 413 and the third right opening form a third cold air opening 45, the first cold air opening 43, the second cold air opening 44 and the third cold air opening 45 are not only air inlets but also air outlets, and the first cold air opening 43 is a heat dissipation hole inside the motor, can dispel the heat to the inside structure of stator core 3, No. two cold wind mouths 44, No. three cold wind mouths 45 are the outside louvre of motor, can dispel the heat to the inside of motor, and the structure in the casing 4 dispels the heat.

A plurality of mounting grooves 414 are evenly seted up to left part 41 both sides, a plurality of mounting bars are evenly seted up to right part 42 both sides, and the mounting groove 414, the mounting bar two use of mutually supporting, and when in-service use, the staff inserts the mounting bar of right part 42 in mounting groove 414 earlier, carries out the bolt fastening again, not only makes casing 4 convenient to detach not only, and the joint strength of left part 41 and right part 42 also further improves moreover.

The stator core 3 comprises an upper portion 31 and a lower portion 32, the upper portion 31 and the lower portion 32 are identical in structure and are of a circular ring structure, outer walls of the upper portion 31 and the lower portion 32 are fixedly sleeved on an inner wall of the shell 4, inner walls of the upper portion 31 and the lower portion 32 are sequentially fixedly sleeved with the torque control winding 2 and the suspension winding 1 from inside to outside, an annular gap is reserved between the upper portion 31 and the lower portion 32, and the annular gap is convenient for heat dissipation inside the stator core 3, so that a heat dissipation effect is achieved.

Rotor structure 5 includes rotor 51, sheath 52, a pivot 54, No. two pivots 53, rotor 51 top fixed connection is to pivot 54, bottom fixed connection is to pivot 53 No. two, the sheath 52 is cup jointed in the outer wall is fixed, and pivot 54 is close to the one end of rotor 51, the one end that No. two pivots 53 are close to rotor 51 all is located the sheath 52, the sheath 52 outer wall is equipped with stator core 3, sheath 52 can be to rotor 51, pivot 54, No. two pivots 53 play protection and fixed action, and also can avoid the motor to take place to deform when high-speed rotation, further improve the practicality of this motor.

A mounting process of a high-speed bearingless permanent magnet synchronous motor comprises the following steps:

when the motor is installed, a worker respectively installs a first rotating shaft 54 and a second rotating shaft 53 at two ends of a rotor 51, then sleeves a sheath 52 outside the rotor 51, and enables one ends of the first rotating shaft 54 and the second rotating shaft 53 to be located in the sheath 52, then sleeves a suspension winding 1, a torque control winding 2 and a stator iron core 3 outside a rotor structure 5, sleeves a left part 41 and a right part 42 of a shell 4 outside the stator iron core 3, specifically, inserts an installation strip of the right part 42 into an installation groove 414, and then carries out bolt fixing;

when cooling and radiating the motor, the staff blows cold air into the first cold air port 43, the second cold air port 44 and the third cold air port 45 respectively, and the inside of the motor can be radiated.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.

Claims

1. The utility model provides a high-speed no bearing PMSM which characterized in that: including suspension winding (1), torque control winding (2), stator core (3), casing (4) and rotor structure (5), stator core (3) are the hollow cylinder structure, and stator core (3) inside is equipped with rotor structure (5), and stator core (3) inner wall from the lining to outer fixed cup joint torque control winding (2), suspension winding (1) in proper order, and stator core (3) outer wall is fixed the cover and is connected to casing (4) inner wall.

2. A high speed bearingless permanent magnet synchronous machine according to claim 1, characterized in that: the motor shell (4) comprises a left portion (41) and a right portion (42), the left portion (41) and the right portion (42) are both of annular groove structures, the left portion (41) is fixedly connected to the right portion (42), the left portion and the right portion form an annular structure, and a stator core (3) is arranged in the annular structure.

3. A high speed bearingless permanent magnet synchronous machine according to claim 2, characterized in that: the middle part of one side of the left part (41) is provided with a first left opening (411), the upper side and the lower side of the left part (41) are respectively provided with a second left opening (412) and a third left opening (413), the middle part of one side of the right part (42) is provided with a first right opening, the upper side and the lower side of the right part (42) are respectively provided with a second right opening and a third right opening, the first left opening (411) and the first right opening form a first cold air opening (43), the second left opening (412) and the second right opening form a second cold air opening (44), and the third left opening (413) and the third right opening form a third cold air opening (45).

4. A high speed bearingless permanent magnet synchronous machine according to claim 2, characterized in that: a plurality of mounting grooves (414) are uniformly formed in the two sides of the left portion (41), a plurality of mounting strips are uniformly formed in the two sides of the right portion (42), and the mounting grooves (414) and the mounting strips are matched with each other for use.

5. The high-speed bearingless permanent magnet synchronous motor according to claim 1, wherein: stator core (3) include upper portion (31) and lower part (32), upper portion (31), lower part (32) structure are the same, are the ring structure, and upper portion (31), lower part (32) outer wall all fix the cover and connect to casing (4) inner wall, and upper portion (31), lower part (32) inner wall all fix in proper order from inside to outside cup joints torque control winding (2), suspension winding (1), and leaves annular gap between upper portion (31), lower part (32).

6. A high speed bearingless permanent magnet synchronous machine according to claim 1, characterized in that: rotor structure (5) include rotor (51), sheath (52), pivot (54), No. two pivot (53), rotor (51) top fixed connection to pivot (54) No. one, bottom fixed connection to pivot (53) No. two, outer wall fixed socket joint sheath (52), and one end that pivot (54) are close to rotor (51), the one end that pivot (53) are close to rotor (51) No. two all is located sheath (52), sheath (52) outer wall is equipped with stator core (3).