CN210839214U

CN210839214U - Mounting structure of magnetic bearing of magnetic suspension centrifuge

Info

Publication number: CN210839214U
Application number: CN201922228187.1U
Authority: CN
Inventors: 林英哲; 刘淑云; 吴立华; 董继勇
Original assignee: Nanjing Cigu Technology Co Ltd
Current assignee: Nanjing Cigu Technology Co Ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-06-23
Anticipated expiration: 2029-12-13
Also published as: WO2021114491A1

Abstract

The utility model discloses a magnetic suspension centrifuge magnetic bearing mounting structure, which comprises an air inlet channel, an impeller, a stator, a first axial electromagnetic bearing, a second axial electromagnetic bearing, a first permanent magnetic radial magnetic bearing, a second permanent magnetic radial magnetic bearing, a casing and a rotor mandrel; the stator is arranged in the casing, the rotor mandrel penetrates through the stator and extends out of the casing, the first axial electromagnetic bearing and the second axial electromagnetic bearing are arranged at two ends of the rotor mandrel, which are positioned in the casing, the first permanent magnetic radial magnetic bearing is arranged on the inner side surface of the second axial electromagnetic bearing, the impeller is arranged on the outer side of one end of the casing, and the second permanent magnetic radial magnetic bearing is arranged outside the rotor mandrel, which is positioned on the outer side of the impeller and on the inner side of the air inlet. The utility model changes the installation position of the second permanent magnet radial magnetic bearing, so that the overall structure and the size of the motor are reduced; the inner structure of the shell is simpler and is easy to disassemble and assemble; the length of the thickest part of the outer diameter of the motor rotor is shortened, and the weight is lightened.

Description

Mounting structure of magnetic bearing of magnetic suspension centrifuge

Technical Field

The utility model belongs to magnetic suspension centrifuge field, concretely relates to magnetic suspension centrifuge magnetic bearing's mounting structure.

Background

The magnetic suspension technology is that the magnetic bearing and the positioning sensor utilize a numerical control magnetic bearing system to realize that a moving part of the compressor is suspended on a magnetic liner to move without friction, the numerical control magnetic bearing system consists of a radial bearing and an axial bearing, the radial bearing and the axial bearing consist of a permanent magnet and an electromagnet, and the positioning sensor on the magnetic bearing provides ultrahigh-speed real-time repositioning for a motor rotor so as to ensure accurate positioning.

In the prior art, the radial bearing and the axial bearing are both arranged in the shell of the magnetic suspension centrifuge, so that the overall structure of the motor is large, the internal structure is complex, and the mass is heavy.

SUMMERY OF THE UTILITY MODEL

The technical purpose is as follows: to the problem that exists among the prior art, the utility model discloses a mounting structure of magnetic suspension centrifuge magnetic bearing.

The technical scheme is as follows: the utility model adopts the following technical scheme: a mounting structure of a magnetic suspension centrifuge magnetic bearing comprises an air inlet channel, an impeller, a stator, a first axial electromagnetic bearing, a second axial electromagnetic bearing, a first permanent magnetic radial magnetic bearing, a second permanent magnetic radial magnetic bearing, a casing and a rotor mandrel; the inner side of the casing is provided with a stator, a rotor mandrel penetrates through the stator and extends out of the casing, a first axial electromagnetic bearing and a second axial electromagnetic bearing are respectively arranged at two ends of the rotor mandrel, which are positioned in the casing, the inner side surface of the second axial electromagnetic bearing is provided with a first permanent magnetic radial magnetic bearing, the outer side of one end of the casing, which is far away from the first permanent magnetic radial magnetic bearing, is provided with an impeller, and the periphery of the rotor mandrel, which is positioned at the outer side of the impeller and at the inner side of an.

Preferably, the second axial electromagnetic bearing and the first permanent magnetic radial magnetic bearing are provided with end covers at the periphery.

Has the advantages that: the utility model transfers one of the permanent magnet radial magnetic bearings of the magnetic suspension centrifuge from the casing to the air inlet channel, so that the length of the casing is shortened, and the overall structure and the size of the motor are reduced; the inner structure of the shell is simpler and is easy to disassemble and assemble; the length of the thickest part of the outer diameter of the motor rotor is shortened, and the weight is lightened.

Drawings

Fig. 1 is a diagram of a position mounting structure of a magnetic bearing according to the present invention;

FIG. 2 is a view showing the structure of the direction A in FIG. 1;

FIG. 3 is a prior art positional mounting configuration diagram of a magnetic bearing;

the device comprises an air inlet channel 1, an impeller 2, a stator 3, a first axial electromagnetic bearing 4, a second axial electromagnetic bearing 5, a first permanent magnetic radial magnetic bearing 6, a second permanent magnetic radial magnetic bearing 7, an end cover 8, a shell 9 and a rotor mandrel 10.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

The utility model discloses a magnetic suspension centrifuge magnetic bearing mounting structure, which comprises an air inlet channel 1, an impeller 2, a stator 3, a first axial electromagnetic bearing 4, a second axial electromagnetic bearing 5, a first permanent magnetic radial magnetic bearing 6, a second permanent magnetic radial magnetic bearing 7, an end cover 8, a casing 9 and a rotor mandrel 10; wherein, casing 9 inboard sets up stator 3, rotor dabber 10 runs through stator 3 and extends outside casing 9, the both ends that rotor dabber 10 is located casing 9 inside set up first axial electromagnetic bearing 4 and second axial electromagnetic bearing 5 respectively, second axial electromagnetic bearing 5 medial surface sets up first permanent magnetism radial magnetic bearing 6, the periphery of second axial electromagnetic bearing 5 and first permanent magnetism radial magnetic bearing 6 sets up end cover 8, casing 9 one end outside of keeping away from first permanent magnetism radial magnetic bearing 6 sets up impeller 2, be located the impeller 2 outside, the periphery of the rotor dabber 10 of intake duct 1 inboard sets up second permanent magnetism radial magnetic bearing 7, second permanent magnetism radial magnetic bearing 7 passes through the fix with screw on the intake duct pipe wall in this embodiment.

The utility model discloses in, the axial position of first axial electromagnetic bearing 4 and second axial electromagnetic bearing 5 control rotor dabber 10 of mutually supporting, the radial position of first permanent magnetism radial magnetic bearing 6 and the radial magnetic bearing 7 of second permanent magnetism control rotor dabber 10 of mutually supporting has guaranteed that rotor dabber 10 rotates in certain space to rotor dabber 10 drives impeller 2 and rotates, lets in gas in the intake duct 1 and takes away the heat that the magnetic bearing produced.

The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. A mounting structure of magnetic suspension centrifuge magnetic bearings is characterized by comprising an air inlet channel (1), an impeller (2), a stator (3), a first axial electromagnetic bearing (4), a second axial electromagnetic bearing (5), a first permanent magnetic radial magnetic bearing (6), a second permanent magnetic radial magnetic bearing (7), a casing (9) and a rotor mandrel (10); the air inlet channel structure is characterized in that a stator (3) is arranged on the inner side of the casing (9), the rotor mandrel (10) penetrates through the stator (3) and extends out of the casing (9), a first axial electromagnetic bearing (4) and a second axial electromagnetic bearing (5) are respectively arranged at two ends, located inside the casing (9), of the rotor mandrel (10), a first permanent magnetic radial magnetic bearing (6) is arranged on the inner side face of the second axial electromagnetic bearing (5), an impeller (2) is arranged on the outer side of one end, far away from the first permanent magnetic radial magnetic bearing (6), of the casing (9), and a second permanent magnetic radial magnetic bearing (7) is arranged on the periphery of the rotor mandrel (10), located on the outer side of the impeller (2) and on the inner.

2. A mounting structure for magnetic bearings of magnetic levitation centrifuges according to claim 1 characterized in that the second axial electromagnetic bearing (5) and the first permanent magnetic radial magnetic bearing (6) are peripherally provided with end caps (8).