Patent ID: 8210821
Filing Date: 2012-07-03
Classification: F01D

Abstract:
1. A labyrinth seal for a gap between a dovetail tab and a rotor, comprising: a first leg extending inward in a radial plane along a profile of the dovetail tab and positioned about a high-pressure side of the dovetail tab; a second leg extending inward in a radial plane along a profile of the dovetail tab and positioned about a low-pressure side of the dovetail tab, the first leg and the second leg being longitudinally spaced apart; and a labyrinth chamber extending outward in a radial plane and positioned between the first leg and the second leg such that high-pressure fluid passing through the gap about the first leg of the dovetail tab expands within the labyrinth chamber so as to limit an amount of the high-pressure fluid that passes beyond the second leg.