EP0467341A1
Expired / Lapsed
EP
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Superconducting bearing device
Assignee: Koyo Seiko Co Ltd
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Filing: 1991-07-17
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Granted: —
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Expires: 2011-07-17
Abstract
Abstract A superconducing bearing device comprising a permanent magnet portion (3) provided on a rotatable member (1), and a superconductor disposed as opposed to the magnet portion (2). The permanent magnet portion (3) is so mounted on the rotatable member (1) that the rotation of the rotatable member does not alter the magnetic flux distribution around the axis of rotation of the member. The superconductor (2) permits penetration of the magnetic flux of the magnet portion thereinto, is spaced apart from the magnet portion (3) by a distance permitting a predetermined quantity of magnetic flux of the magnetic portion (3) to penetrate thereinto, and is disposed at a position not permitting the rotation of the rotatable member (1) to alter the distribution of penetrating magnetic flux.
Inventors
- 👤 Ryoichi Takahata
- 👤 Shoji Eguchi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 17:29
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/04; F16C32/0406; F16C32/0408; F16C32/0436; F16C32/0438; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/876; Y10S505/877; Y10S505/902; Y10S505/903
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
136 words
A superconducting bearing device comprising, in a temperature environment for realizing a Type II superconducting state, a permanent magnet portion provided on a rotatable member, and a Type II superconductor disposed as opposed to the permanent magnet portion, the permanent magnet portion being so mounted on the rotatable member that the rotation of the rotatable member does not alter the magnetic flux distribution around the axis of rotation of the rotatable member, the Type II superconductor permitting penetration of the magnetic flux of the permanent magnet portion thereinto and being spaced apart from the permanent magnet portion by a distance permitting a predetermined quantity of magnetic flux of the portion to penetrate thereinto, the superconductor being disposed at a position not permitting the rotation of the rotatable member to alter the distribution of penetrating magnetic flux.
Claim 2
Dependent Claim
136 words
A superconducting bearing device comprising, in a temperature environment for realizing a Type II superconducting state, a permanent magnet portion provided on a rotatable member, and a Type II superconductor disposed as opposed to the permanent magnet portion, the permanent magnet portion being so mounted on the rotatable member that the rotation of the rotatable member does not alter the magnetic flux distribution around the axis of rotation of the rotatable member, the Type II superconductor permitting penetration of the magnetic flux of the permanent magnet portion thereinto and being spaced apart from the permanent magnet portion by a distance permitting a predetermined quantity of magnetic flux of the portion to penetrate thereinto, the superconductor being disposed at a position not permitting the rotation of the rotatable member to alter the distribution of penetrating magnetic flux.
Claim 3
Dependent Claim
52 words
A device as defined in claim 1 wherein the permanent magnet portion is in the form of a disk and mounted on the rotatable member concentrically therewith, and the Type II superconductor is opposed to an end face of the permanent magnet portion and spaced apart therefrom axially of the rotatable member.
Claim 4
Dependent Claim
52 words
A device as defined in claim 1 wherein the permanent magnet portion is in the form of a disk and mounted on the rotatable member concentrically therewith, and the Type II superconductor is opposed to the outer periphery of the permanent magnet portion and spaced apart therefrom radially of the rotatable member.
Claim 5
Dependent Claim
86 words
A device as defined in claim 2 or 3 wherein the permanent magnet portion comprises a plurality of annular permanent magnets arranged at a spacing radially of the rotatable member and a nonmagnetic material interposed therebetween, and the ends of each permanent magnet which are opposite axially of the rotatable member are magnetized to polarities opposite to each other, all the permanent magnets being magnetized to the same polarity at their ends which are positioned toward the same direction with respect to the axis of rotation.
Claim 6
Dependent Claim
75 words
A device as defined in claim 2 or 3 wherein the permanent magnet portion comprises a plurality of annular permanent magnets arranged at a spacing radially of the rotatable member and a nonmagnetic material interposed therebetween, and the side portions of each permanent magnet which are opposite radially of the rotatable member are magnetized to polarities opposite to each other, the opposed side portions of the adjacent permanent magnets being magnetized to the same polarity.
Claim 7
Dependent Claim
73 words
A device as defined in claim 2 or 3 wherein the permanent magnet portion comprises a plurality of annular permanent magnets arranged at a spacing axially of the rotatable member and a nonmagnetic material interposed therebetween, and the ends of each permanent magnet which are opposite axially of the rotatable member are magnetized to polarities opposite to each other, the opposed ends of the adjacent permanent magnets being magnetized to the same polarity.
References Cited (Backward Citations)
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