A magnetic levitation pump with three degrees of freedom magnetic bearing

A technology of magnetic bearings and degrees of freedom, applied in the direction of bearings, bearing cooling, shafts and bearings, etc., can solve the problems of complex mathematical models of levitation force and driving force, increase the difficulty of control, etc., and achieve long-term stable use and precision The effect of simple control and rotor structure

Active Publication Date: 2021-09-28
ZHEJIANG UNIV
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Problems solved by technology

Another example is the Chinese invention patent with the publication number CN101207310A, which discloses a three-degree-of-freedom bearingless alternating pole permanent magnet motor with axial active suspension. The two windings are integrated in the same closed magnetic circuit, so that the magnetic linkage of the suspension winding and the driving winding are coupled. When the motor load is large and the current in the driving winding is large, there is a gap between the torque control and the suspension control. Strong coupling greatly increases the difficulty of control

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  • A magnetic levitation pump with three degrees of freedom magnetic bearing
  • A magnetic levitation pump with three degrees of freedom magnetic bearing
  • A magnetic levitation pump with three degrees of freedom magnetic bearing

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] Such as figure 1 , figure 2 , image 3 with Figure 4 As shown, a magnetic levitation pump related to the present invention includes a pump head PH, a three-degree-of-freedom magnetic bearing MB and a rotary drive assembly MT.

[0028] The pump head PH is composed of the cavity formed by the pump cover 1A and the pump casing 1B and its contents; the rotor 20 is arranged in the pump head PH, and the rotor 20 includes the impeller 2, the annular rotor core 8 and the rotor permanent magnet 9, the impeller 2 It is used to drive the water to rotate so that it is pumped to the outside of the pump due to centrifugal force. The arrangement of the impeller 2 can refer to the existing centrifugal pump scheme, and the arrangement of the ring-shaped rotor core 8 and the rotor permanent magnet 9 can refer to the rotary drive assembly MT below. Description: The pump head...

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Abstract

The invention relates to a magnetic levitation pump with a three-degree-of-freedom magnetic bearing, which includes a three-degree-of-freedom magnetic bearing and a rotating drive assembly. The three-degree-of-freedom magnetic bearing plays a role in suspending and positioning a rotor and an impeller, and the rotating drive assembly has an outer rotor structure; It is mainly used to solve the unstable phenomenon of the rotor in the axial direction when the two-degree-of-freedom bearingless motor is applied to the pump. Moreover, the coupling problem existing between the suspension winding flux linkage and the driving winding flux linkage is improved, and the difficulty of motor control is reduced. The structure is compact, which is convenient for high cleanliness occasions; the magnetic linkage between the rotating drive winding and the suspension winding is not coupled, which is convenient for control.

Description

technical field [0001] The invention relates to the technical field of magnetic levitation pumps, in particular to a magnetic levitation pump with a three-degree-of-freedom magnetic bearing. Background technique [0002] In the fields of semiconductor manufacturing, high-purity chemical engineering, and biomedicine, there are many occasions that require the use of high-purity fluids. Due to its unique principle advantages, magnetic levitation pumps are increasingly used in various industries. In the field of life sciences, magnetic levitation blood pumps have been used as artificial hearts because they can prevent hemolysis, coagulation and thrombus caused by blood cell damage. In biotechnology, magnetic levitation pumps are widely used in sterilization processes because there are no gaps or small gaps for bacteria to survive, which makes them ideal pumps for biochemical applications. Another example is that the chemical liquid supply system in the lithography machine is a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C32/04F16C37/00F04D29/048
CPCF04D29/048F16C32/0446F16C32/0451F16C32/0465F16C32/0468F16C32/0485F16C37/005
Inventor 阮晓东朱超宁胡亮付新苏芮
Owner ZHEJIANG UNIV
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