Patent ID: 8251371
Filing Date: 2012-08-28
Classification: F01D,F16J

Abstract:
1. A labyrinth seal having a stator and a rotor for a gas turbine, comprising: a metal ring having a metallic annular element arranged on the rotor about a central axis of the gas turbine and having a plurality of annular sealing lips, each annular sealing lip having a first circumferential face, a second circumferential face and a sealing edge positioned between the first and second circumferential faces, the sealing edge sealing against the stator of the gas turbine, wherein each sealing lip includes at least one groove on its circumference which is arranged in a radial direction with respect to the central axis of the gas turbine; the groove being a slot extending between the first circumferential face and the second circumferential face, and being open between the first circumferential face and the second circumferential face and to the sealing edge; the groove being arranged parallel to a central axis of the sealing ring; an area of the groove opposite the portion open to the sealing edge being rounded; wherein the groove extends over a full height of the sealing lip.