Patent ID: 9103223
Filing Date: 2015-08-11
Classification: F01D,F02C,F05D,F16J

Abstract:
1. A shaft sealing device provided in an annular space between a rotor and a stator surrounding an outer periphery of the rotor to divide the annular space into a high-pressure region and a low-pressure region in a direction of an axis of the rotor, the shaft sealing device comprising: a seal body having a plurality of thin plate sealing pieces that extend from the stator toward a radial inner side of the rotor and are stacked in a circumferential direction of the rotor; a high-pressure side plate that extends from the stator toward a radial inner side so as to run along a high-pressure side of the seal body, and is segmented into a plurality of portions in the circumferential direction; and a rigidity imparting member configured to impart rigidity in the direction of the axis of the rotor to a portion of a surface of the high-pressure side plate that faces the high-pressure region, wherein the rigidity imparting member is a supporting plate portion comprising a first plate piece and a second plate piece, wherein the first plate piece is stacked on the surface of the high-pressure side plate that faces the high-pressure region, and extends from the stator toward the radial inner side, wherein a longitudinal length of the first plate piece is shorter than the high-pressure side plate, and wherein the second plate piece is stacked on the surface of the first plate piece that faces the high-pressure region, and extends from the stator toward the radial inner side, wherein a longitudinal length of the second plate piece is shorter than the first plate piece.