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公开(公告)号：US11325140B2
公开(公告)日：2022-05-10
申请号：US16328510
申请日：2017-08-08
申请人： NTN CORPORATION
发明人： Teruyoshi Horiuchi
摘要： An air turbine drive spindle capable of suppressing a pressure increase inside a through hole is provided. A spindle includes a rotary shaft and an outer circumferential member (a housing assembly, a cover and a nozzle plate). The rotary shaft is provided with a through hole. The outer circumferential member includes a bearing sleeve configured to surround at least a portion of an outer circumferential surface of the rotary shaft. The outer circumferential member includes a gas supply portion and a gas exhaust hole. The spindle includes a second gas exhaust portion (a first gas exhaust hole and a first gas flow passage). The second gas exhaust portion is independent of the gas exhaust hole and continuous to outside from a gas exhaust space.
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公开(公告)号：US11033915B2
公开(公告)日：2021-06-15
申请号：US16319618
申请日：2017-07-07
申请人： NTN Corporation
发明人： Teruyoshi Horiuchi
摘要： An air turbine drive spindle includes a rotary shaft, a bearing portion, a damper ring, a cover member, and at least one or more O rings. The bearing portion surrounds at least a portion of an outer circumferential surface of the rotary shaft. The damper ring is disposed at the outer circumferential side relative to the bearing portion with a gap being interposed therebetween. The cover member is disposed at the outer circumference side relative to the damper ring with a gap being interposed therebetween, and is configured to store the rotary shaft, the bearing portion, and the damper ring. At least one or more O rings are disposed in each of the gap and the gap.
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