Patent ID: 9377109
Filing Date: 2016-06-28
CPC Classification: F01D,F05D,F16J

Claim Text:
1. A seal structure of a rotary machine, comprising: a casing; and a rotating body which is rotated about an axis in an interior of said casing, wherein said casing comprises: wherein said outer circumference side member has a ring-shaped flange which projects inward in said radial direction and which extends about the axis, wherein said inner circumference side member is formed in a ring shape which projects outward in said radial direction and which extends about the axis, and it has a flange which is opposite to the flange of said outer circumference side member in the axial direction, wherein on either one of the flange of said outer circumference side member or the flange of said inner circumference side member, there is formed a ring-shaped groove part which is recessed from an end surface facing the other of the flanges which does not have the groove part and which extends about the axis, wherein said groove part accommodates a ring-shaped seal body which advances and retracts so as to be able to come in contact with said other of the flanges which does not have the groove part, wherein there are provided a plurality of first biasing devices which bias said seal body toward said other of the flanges which does not have the groove part, and a plurality of second biasing devices which bias said seal body toward a wall surface of said groove part facing in said radial direction, wherein said plurality of first biasing devices are arranged only at respective first positions in a circumferential direction of the seal body, wherein said plurality of second biasing devices are arranged only at respective second positions which are different positions in the circumferential direction of the seal body from the first positions and adjacent to the respective first positions in the circumferential direction of the seal body, and wherein at least one of said second biasing devices is arranged between adjacent first biasing devices in the circumferential direction of the seal body.