Patent ID: 7052017
Filing Date: 2006-05-30
Classification: F05C,F16J

Abstract:
1. A rotary machine comprising: a rotating member supported for rotation about an axis of rotation; a stationary member surrounding the rotating member; and a sealing device disposed in a gap between the rotating member and the stationary member, the sealing device including: a plurality of sealing fins arranged opposite to each other on the opposite sides of the gap; and a ridge disposed opposite to at least two of the sealing fins, the ridge having a width greater than a thickness of the sealing fins along the axis of rotation, wherein at least the sealing fins arranged on one side of the gap are axially spaced apart at unequal pitches, wherein the plurality of sealing fins includes a set of at least two first fins opposite to the ridge and second fins other than the first fins, the second fins being opposite to each other, and wherein the first fins are arranged at pitches smaller than those at which the second fins are arranged.