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EP0575619A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Superconductive bearing device

Assignee: Koyo Seiko Co Ltd
•
Filing: 1992-03-13
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Granted: —
•
Expires: 2012-03-13
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Abstract

Abstract A superconductive bearing device for supporting rotatably a shaft (rotor) (2) rotating at a high speed, under a non-contact state. A superconductive bearing (4) for supporting the shaft (2) under a non-contact state to a housing (1) includes a permanent magnet (14) fitted to the shaft (2) and a second kind of superconductor (17) so fitted to the housing (1) as to be spaced apart from, and to oppose in a vertical direction, the permanent magnet (14). A touchdown bearing (21) consisting of a thrust ball bearing is disposed at the opposed portion between the housing (1) and the shaft (2). There is disposed an initial positioning mechanism which sets relative positions of the housing (1) and the shaft (2) by moving up and down a race (23) of the touchdown bearing (21) on the housing (1) side. This initial positioning mechanism can set the relative positions between the second kind superconductor (17) and the permanent magnet (14) on the side of the shaft (2), and the superconductive bearing (4) can be operated efficiently by setting suitably the relative positions. Breakage of the shaft (2) and components near the shaft (2), when the superconductor (17) of the superconductive bearing (4) changes to a normal conductor, can be prevented by the touchdown bearing (21).

Inventors

  • 👤 Ryoichi Takahata
  • 👤 Motoaki Shibayama

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-09 03:38
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/04; F16C32/0406; F16C32/0408; F16C32/0436; F16C32/0438; F16C39/00; F16C39/02; F16C2326/00; F16C2326/10; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/902; Y10S505/903

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 285 words
A supercondducting bearing device adapted to rotatably support a rotary body by superconducting bearing in a noncontact state, the rotary body being so disposed as to be movable relative to a fixed portion in the direction of axis of rotation and in a direction orthogonal to the direction of rotation axis, the rotary body being rotatable relative to the fixed portion, the superconducting bearing device being characterized in that the superconducting bearing comprises a permanent magnet mounted on the rotary body, and a Type II superconductor attached to the fixed portion and opposed to the magnet, the permanent magnet being so mounted on the rotary body that the rotation of the rotary body will not alter the magnetic flux distribution around the axis of rotation of the rotary body, the Type II superconductor permitting the penetration of magnetic flux of the permanent magnet thereinto in a temperature environment realizing a Type II super conducting state and being so attached to the fixed portion as to be disposed at a position which is spaced apart from the magnet by a distance permitting a predetermined quantity of magnetic flux thereof to penetrate thereinto and which will not permit the rotation of the rotary body to alter the distribution of penetrating magnetic flux, opposed portions being provided between the fixed portion and the rotary body to position the former below the latter, a mechanical catcher bearing being disposed at the opposed portions and having a bearing member on the fixed portion side, an initial position determining mechanism being provided between the fixed portion and the rotary body for lifting the bearing member to determine the position of the fixed portion and the rotary body relative to each other.
Claim 2
Dependent Claim 59 words
A superconducting bearing device as defined in claim 1 wherein the mechanical catcher bearing is a thrust ball bearing provided concentrically with the rotary body, the thrust ball bearing having a bearing ring attached to the fixed portion and another bearing ring attached to the rotary body, the bearing ring on the fixed portion being movable upward and downward.
Claim 3
Dependent Claim 98 words
A superconducting bearing device as defined in claim 1 wherein the mechanical catcher bearing is a thrust slide bearing provided concentrically with the rotary body and comprising a slide ring and an annular recessed portion approximately inverted V-shaped in cross section, the slide ring being provided on the fixed portion and formed on an upper surface thereof with an upwardly tapered annular ridge, the annular recessed portion being formed in the rotary body concentrically therewith at a portion thereof opposed to the annular ridge for the ridge to fit in, the slide ring being movable upward and downward.

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