| 摘要 |
A cryogenic, ultra high-speed rolling bearing comprises an inner ring 12 fitted onto a rotating shaft rotating at ultra-high speeds under cryogenic conditions, an outer ring 14 concentrically surrounding the inner ring with a space therebetween and fitted onto a fixed portion, a plurality of rolling elements 16 rotatably inserted in the space between the inner ring and the outer ring, and a retainer 20 located between the inner ring and the outer ring to hold the rolling elements at intervals therebetween. The retainer 20 comprises a retainer body 22 having a plurality of pocket holes 21 formed therethrough in a radial direction to contain the rolling elements at intervals therebetween, and a solid lubricant film 24 (pocket hole coating 24 A and guideway coating 24 B) provided on the inner surfaces of the plurality of pocket holes and a guideway contacting the inner or outer ring and having transfer properties and a low friction coefficient enough for cryogenic conditions.
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