TESTING DEVICE FOR LIGHTENING CHARACTERISTIC OF MAGNETIC FLUX PINNING MECHANISM IN SUPERCONDUCTIVITY BEARING

摘要

PROBLEM TO BE SOLVED: To provide a measuring method and a testing device for revolution loss characteristics properly reflecting unstable characteristics and its influence for displacement of floating positions (axial direction) of a superconductivity bearing caused by considerable deteriorating phenomena of superconductivity magnetic floating characteristics of the superconductivity bearing generated by a lightening characteristic of a considerable magnetic flux pinning mechanism in association with rotation of the superconductivity bearing; to accurately design the superconductivity bearing, when the superconductivity bearing is applied to a rotary machine and a rotary body is rotatably supported in a non-contact state.;SOLUTION: In the figure, a vertical sectioned picture where a radial superconductivity bearing 8 for testing is mounted on a revolution loss measuring device known as a prior art. Positions of a stator 8a supported on a supporting base is automatically moved up and down by a testing device 10 of the lightening characteristic of a magnetic flux pinning mechanism including a stator elevating unit so that load of the stator 8a changed by progress of time based on deteriorating phenomena of superconductivity magnetic flux floating characteristics generated in association with rotation of the superconductivity bearing is maintained at a preset test load value which is always within an allowable error. Thus, the conductivity bearing has an equivalent characteristic with a case that it is used for actual rotary machinery.;COPYRIGHT: (C)2004,JPO&NCIPI