Patent ID: 6568688
Filing Date: 2003-05-27
Classification: F01D,F16J,Y02T

Abstract:
Hydraulic seal arrangement (5) between two coaxially rotating shafts (1, 2) of a gas turbine engine, where the radially outer shaft (2) when viewed with reference to the shafts' axis of rotation (3) has an annulus (5a) extending radially outward along its circumference into which the radially inner shaft (1) when viewed with reference to the shafts' axis of rotation (3) projects with a web (5b) that extends radially outward across its circumference, and which annulus (5a) can through an inlet area (5d) be filled siphon-fashion under centrifugal effect with a hydraulic medium (5c) at least in the area of the free end of the web (5b) when the shafts are rotating, wherein means are provided for exhausting some of the hydraulic medium (5c), said means branching off from an annulus area (5e) that essentially lies radially outwardmost from the inlet area (5d).