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    • 23. 发明专利
    • MAGNETIC THRUST BEARING
    • JPH05321934A
    • 1993-12-07
    • JP13047392
    • 1992-05-22
    • HITACHI LTD
    • SAKANASHI TAKAFUMIFUKUSHIMA YASUOMATSUSHITA OSAMIHIROSHIMA MINORUYONEYAMA MITSUOTAKAHASHI NAOHIKO
    • F04D29/056F04D29/04F04D29/058F16C32/04
    • PURPOSE:To enable continuous operation for a long period by composing a magnetic thrust bearing of plural coils and a circular housing having the same number of coil slots as the coils for the coils to be inserted providing a protrusion at a forward end of each coil slot, and inserting plural plates in the circumferential direction. CONSTITUTION:Protrusions are provided in a housing 3 at forward ends of coil slots, a width (a) of a protruding part is set wider than a width (b) of a coil slot part, and a cut is provided at one position of a circumference of the protruding part. A coil 4 is wound at the coil slot part, a plate 5 is inserted from the cut part, and these are installed at several positions in the circumference while moving along the circumference. After assembling the coils 4 and the plates 5 in the housing 3, a varnish process is applied, insulation property of the housing 3, coils 4, and plates 5 is improved, and the coils 4 and the plates 5 are restrained to the housing 3. A magnetic bearing can thus be operated continuously for a long period, and removal of the coils 4 from the housing 3, when it is caused by reduction of restraining force between the coils 4 by secular deterioration, can be prevented by effect of the plates 5.