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    • 10. 发明授权
    • Resin-made cage and bearing
    • 树脂制保持架和轴承
    • US08113718B2
    • 2012-02-14
    • US12224922
    • 2007-03-07
    • Takashi ItoShohei NakamuraMasayuki NozakiMasaki EgamiTakuya IshiiToyohiko OtaAkira OkayasuRei Mihara
    • Takashi ItoShohei NakamuraMasayuki NozakiMasaki EgamiTakuya IshiiToyohiko OtaAkira OkayasuRei Mihara
    • F16C33/44F16C33/38
    • F16C33/44F02K9/60F04D29/023F04D29/026F04D29/049F04D29/059F05D2300/43F05D2300/432F05D2300/509F16C19/163F16C33/3831F16C33/6696F16C2300/52F16C2360/42
    • It is an object of the present invention to provide a cage that can be used in a cryogenic-temperature environment or a vacuum without providing the cage with a complicated construction and without performing special treatment and a bearing using the cage. A cage made of resin has an annular main body having a plurality of pocket portions radially penetrating the main body; and a plurality of pocket members, provided on the annular main body, which hold rolling elements of a rolling bearing. The main body is a molding of a first resin composition consisting of a first resin and a solid lubricant mixed therewith; and at least a rolling element-retaining surface of each of the pocket members is made of a second resin composition containing fluorocarbon resin as a main component thereof. The molding of the first resin composition has a tensile strength of not less than 30 MPa and a heat-resistant temperature of not less than 200° C. The second resin composition is a fluorocarbon resin composition. The rolling bearing is constructed of an inner ring, an outer ring, the rolling elements interposed between the inner ring and the outer ring, and the cage. The rolling bearing is used for a turbopump, of a rocket engine, which uses a liquid fuel.
    • 本发明的一个目的是提供一种可以在低温环境或真空中使用的保持架,而不会使笼子具有复杂的构造并且不进行特殊处理和使用保持架的轴承。 由树脂构成的保持架具有环状主体,该主体具有径向穿透主体的多个口袋部; 以及设置在保持滚动轴承的滚动体的环状主体上的多个袋状部件。 主体是由第一树脂和与其混合的固体润滑剂组成的第一树脂组合物的模制品; 并且每个袋构件的至少一个滚动元件保持表面由包含氟碳树脂作为其主要成分的第二树脂组合物制成。 第一树脂组合物的成型的拉伸强度为30MPa以上,耐热温度为200℃以上。第二树脂组合物为碳氟树脂组合物。 滚动轴承由内圈,外圈,插入在内圈和外圈之间的滚动元件和保持架构成。 滚动轴承用于使用液体燃料的火箭发动机的涡轮泵。