Patent ID: 8702311
Filing Date: 2014-04-22
Classification: F01D,F16C

Abstract:
1. A rotating machine comprising: a rotating shaft having a rotating member; a bearing device having a rotating shaft insertion hole larger in diameter than the rotating shaft, for supporting the rotating shaft extending through the rotating shaft insertion hole with a lubricating oil being supplied to inside of the bearing device; an oil thrower provided between an outer circumferential portion of the rotating shaft insertion hole and the rotating shaft; an additional ring attached to the rotating shaft between the oil thrower and the rotating shaft such as to protrude in a radial direction of the rotating shaft; a retainer bolt extending through the additional ring orthogonally to the rotating shaft, for retaining the additional ring to the rotating shaft; a seal in an inner circumferential portion of the additional ring between an end portion of the additional ring and the retainer bolt, wherein the seal extends in a direction of the rotating shaft and in a direction of the inner circumferential portion of the additional ring so as to press the seal itself against the rotating shaft and the additional ring, thereby to provide a sealing performance, the additional ring includes a through hole through which the retainer bolt is inserted and seal gas is supplied, the seal includes an opening to receive the seal gas supplied from the through hole, thereby to extend in the direction of the rotating shaft and in the direction of the additional ring by pressure of the seal gas.