Title:
STIFFNESS GAIN MECHANISM FOR MAGNETIC SUSPENSION BEARING, MAGNETIC SUSPENSION BEARING, AND BLOOD PUMP
Document Type and Number:
WIPO Patent Application WO/2020/164371
Kind Code:
A1
Abstract:
Disclosed are a stiffness gain mechanism (23) for a magnetic suspension bearing (20), a magnetic suspension bearing (20) comprising the stiffness gain mechanism (23), and a blood pump. The magnetic suspension bearing (20) comprises a stator (21) with stator teeth (211) and a rotor (22) arranged in the stator (21). The stiffness gain mechanism (23) comprises: a rotor permanent magnet (231), a stator permanent magnet (232), and an axial dynamic body (233). The rotor permanent magnet (231) and the rotor (22) of the magnetic suspension bearing (20) form a rotor assembly, and the rotor assembly has an asymmetric structure relative to a main plane (P) of the rotor (22); and the stiffness gain mechanism (23) is configured such that the stator permanent magnet (232) produces a radial attraction on the rotor permanent magnet (231), the axial dynamic body (233) produces an axial repulsive force on the rotor permanent magnet (231), and the magnitude of the axial repulsive force is able to change with the change of the axial distance between the axial dynamic body (233) and the rotor permanent magnet (231). The stiffness gain mechanism (23) can increase the torsional stiffness of the rotor (22) of the magnetic suspension bearing (20) and contribute to the miniaturization of the magnetic suspension bearing (20).
Inventors:
HSU HAOHAO (CN)
HSU POLIN (CN)
YEN IFAN (CN)
LOGAN TOM (CN)
HSU POLIN (CN)
YEN IFAN (CN)
LOGAN TOM (CN)
Application Number:
PCT/CN2020/073208
Publication Date:
August 20, 2020
Filing Date:
January 20, 2020
Export Citation:
Assignee:
MAGASSIST INC (CN)
International Classes:
F16C32/04; A61M60/178; A61M60/216; A61M60/422; A61M60/822
Foreign References:
| US20020074881A1 | 2002-06-20 | |||
| CN1687606A | 2005-10-26 | |||
| CN102247628A | 2011-11-23 | |||
| CN107261231A | 2017-10-20 | |||
| CN101297123A | 2008-10-29 | |||
| CN108679084A | 2018-10-19 | |||
| CN102434587A | 2012-05-02 |
Other References:
See also references of EP 3926194A4
Attorney, Agent or Firm:
CCPIT PATENT AND TRADEMARK LAW OFFICE (CN)
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