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Magnetic levitation rotor system, motor and adjustment method

A magnetic levitation rotor and magnetic levitation technology, applied in the direction of magnetic circuit rotating parts, electromechanical devices, electrical components, etc., can solve problems such as damage, and achieve the effect of precise control

Active Publication Date: 2020-10-09
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the rotor motor in the prior art is prone to damage after thermal expansion

Method used

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  • Magnetic levitation rotor system, motor and adjustment method
  • Magnetic levitation rotor system, motor and adjustment method
  • Magnetic levitation rotor system, motor and adjustment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment provides a magnetic levitation rotor system, such as figure 1 and figure 2 As shown, it includes: a rotating shaft 1, on which a first detection surface 2 and a thrust bearing rotor 8 are arranged, as figure 1 As shown, the first detection surface 2 is set on the left side in the figure, and the thrust bearing rotor 8 is set on the right side in the figure. The front magnetic suspension thrust bearing 6 and the rear magnetic suspension thrust bearing 7 are respectively arranged on both sides of the thrust bearing rotor 8. After the assembly is completed, the thrust bearing rotor 8 is located between the front magnetic suspension thrust bearing 6 and the rear magnetic suspension thrust bearing 7. centre position.

[0034] Such as figure 2 As shown, the axial elongation sensor 9 is arranged on the side of the thrust bearing rotor 8 away from the rotating shaft 1 to obtain the second shape between the thrust bearing rotor 8 and the rear magnetic suspen...

Embodiment 2

[0045] This embodiment provides a motor, including the magnetic levitation rotor system provided in Embodiment 1; and a casing, the magnetic levitation rotor system is arranged inside the casing.

[0046] With the motor provided in this embodiment, after a long period of high-speed operation, by adjusting the magnetic levitation rotor system, the influence of the elongation of the rotating shaft on the entire motor can be well avoided, thereby prolonging the life of the entire motor.

Embodiment 3

[0048] This embodiment provides a control method for the magnetic levitation rotor system provided in embodiment 1, including the following steps: obtaining the first deformation amount and the second deformation amount of the rotating shaft; controlling the thrust bearing rotor to reset to the front magnetic levitation thrust bearing and the middle position of the rear magnetic levitation thrust bearing; the drive sensor moves toward the first detection surface, wherein the movement distance is the sum of the absolute value of the first deformation amount and the absolute value of the second deformation amount.

[0049] Wherein, the first deformation amount is obtained by an axial displacement sensor, and the second deformation amount is obtained by an axial elongation sensor. When the two parameters are obtained respectively, the motion amount of the axial displacement sensor is controlled by the controller, thereby ensuring The distance between the axial displacement sensor ...

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Abstract

The invention provides a magnetic levitation rotor system, a motor and an adjustment method. By controlling distance of a sensor to be sum of an absolute value of first deformation quantity and an absolute value of second deformation quantity, a thrust bearing rotor can be still at an axial suspension central position, namely a middle position of a front magnetic levitation thrust bearing and a rear magnetic levitation thrust bearing, when a rotation shaft is heated to generate strain and after the whole length is increased, a detection distance between a first detection surface and the sensorand a second distance between an axial displacement sensor and the thrust bearing rotor also can be enabled to be maintained unchanged, so that the stability of the rotation shaft during the rotationprocess is further ensured. After the thrust bearing rotor can be enabled to be still at the axial suspension central position, the thrust rotor bearing can be enabled to work at minimum control current, heating quantity of the front magnetic levitation bearing and the rear magnetic levitation bearing is further reduced, and the service lifetime of the bearing can be further prolonged.

Description

technical field [0001] The invention relates to the technical field of magnetic levitation rotor motors, in particular to a magnetic levitation rotor motor and an adjustment method. Background technique [0002] With the continuous development of magnetic levitation technology, the application field of magnetic levitation technology is becoming wider and wider. Magnetic levitation technology is especially widely used in high-speed and ultra-high-speed fields. In high-speed and ultra-high-speed fields, the operating frequency of magnetic levitation rotor motors reaches hundreds of hertz or even thousands of hertz. , the heating of the rotor will cause thermal deformation of the shaft of the ultra-high-speed motor, especially the thermal deformation in the axial direction of the shaft. [0003] In the prior art, such as figure 1 As shown, when assembling the rotor motor, the distance between the first detection surface 2 and the axial displacement sensor 3 is adjusted in adv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K5/16H02K1/27H02K11/30H02N15/00
CPCH02K1/27H02K5/161H02K11/30H02N15/00
Inventor 胡余生陈彬苏久展贾金信刘健宁郭长光
Owner GREE ELECTRIC APPLIANCES INC