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MAGNETIC BEARING APPARATUS

  • US 20070273219A1
  • Filed: 09/07/2006
  • Published: 11/29/2007
  • Est. Priority Date: 07/04/2003
  • Status: Active Grant
First Claim
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1. A magnetic bearing apparatus comprising:

  • a rotatable rotary shaft to which a radial magnetic bearing rotor and an axial magnetic bearing disc are secured;

    electromagnets which are arranged with forming a small gap with respect to said radial magnetic bearing rotor and said axial magnetic bearing disc; and

    a case housing them, wherein said apparatus further comprises;

    cooling wind producing means that produces cooling wind of a low temperature, and that has;

    fins which are disposed on said axial magnetic bearing disc, and which produces an air flow directed in an outer radial direction of said axial magnetic bearing disc;

    a supply port which is positioned in an outer circumferential portion of said fins, and through which the air flow produced by said fins is introduced and ejected as a high-speed air flow in the outer radial direction;

    a generator which converts the high-speed air flow ejected from said supply port, to a vortex flow;

    an air flow path through which the high-speed vortex flow produced by said generator is to flow; and

    a control valve which is disposed on a side of said air flow path opposite to said generator; and

    a cooling wind flow path through which the low-temperature cooling wind produced by said cooling wind producing means is to flow into said magnetic bearing apparatus.

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