Half-open type thrust magnetic levitation bearing

Through the three-layer magnetic ring structure and preset winding design, the problem of magnetic circuit continuity and magnetic field consistency of semi-open axial thrust magnetic levitation bearings in high-speed rotating machinery is solved, and the effective design of axial thrust magnetic levitation bearings is achieved. Suitable for large rotating machinery and equipment.

CN110285142AInactive Publication Date: 2019-09-27TSINGHUA UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TSINGHUA UNIVERSITY
Filing Date
2019-06-04
Publication Date
2019-09-27
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

⚠Technical Problem

It is difficult to design a semi-open axial thrust magnetic bearing with high-speed practical value with existing technology, especially in maintaining the continuity of the magnetic circuit and the consistency of the magnetic field strength. There are challenges.

⚗Method used

Using a three-layer magnetic ring structure, through the stacked setting of ring magnetic poles and the preset semi-open winding design, combined with the design of opposite current directions in the inner and outer coils, the magnetic induction intensity of the middle ring magnetic pole is appropriately sacrificed, and the pole shoes are added to smooth the magnetic field to form Continuous cycle of magnetic poles.

🎯Benefits of technology

It achieves the continuous consistency of the magnetic field intensity of the axial thrust magnetic bearing in the semi-open design, provides a more flexible installation method, and is suitable for large rotating machinery and equipment.

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Abstract

The invention discloses a half-open type thrust magnetic levitation bearing. The bearing comprises a first magnetic ring, a second magnetic ring and a third magnetic ring, wherein the first magnetic ring, the second magnetic ring and the third magnetic ring are arranged in annular and laminating manners so as to form an annular magnetic pole; the magnetic pole of each of the magnetic rings is different from that of the adjacent magnetic ring; a first winding and a second winding of the annular magnetic pole are wound according to a predetermined half-open way, the lower part of the middle magnetic pole is recessed inwards so as to generate a winding space which meets predetermined conditions; and the magnetic pole arranged at the upper end extends, and thus, a complete circle of magnetic pole is formed after splicing. Based on the bearing, continuity and consistency of magnetic field strength of the magnetic poles of the half-opened axial thrust bearing can be basically reserved, and the half-open type thrust magnetic levitation bearing can be applied to high-speed rotation machines; and moreover, a more flexible mounting way can be obtained, particularly to large-size rotation machines.
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