Patent ID: 9677609
Date: 2017-06-13
CPC Classifications: F01D,F05D,F16C

Claim:
1. A thrust bearing disposed so as to face a thrust collar provided on a rotary shaft, the thrust bearing comprising: a top foil having a first surface facing the thrust collar and a second surface opposite to the first surface; a back foil disposed so as to face the second surface of the top foil, and supporting the top foil; and an annular shaped base plate disposed on a side of the back foil opposite to the top foil, and supporting the back foil, wherein the back foil includes back foil pieces arranged in a circumferential direction of the base plate, the top foil includes top foil pieces disposed on the back foil pieces, an area on a leading side of a top foil piece in a rotation direction of the rotary shaft is provided with a fixed part fixed to the base plate, a fixed region positioned on a trailing side of the fixed part in the rotation direction of the rotary shaft linearly extends such that a separation between a straight line extending in a radial direction of the base plate and the fixed region positioned on a trailing side of the straight line in the rotation direction of the rotary shaft gradually increases outward from inside in the radial direction of the base plate, and the fixed-region is non-parallel to the straight line, and the fixed region is formed so as to extend to an outer circumferential edge of the top foil piece from a position between two ends of a first edge positioned on the leading side of the top foil piece in the rotation direction of the rotary shaft.