Gland pressure seal plate

摘要

A steam turbine gland seal arrangement for use in a steam turbine which has at least one casing and a shaft extending through the casing so that steam may be admitted into the casing for operating on blades attached to the shaft for effecting rotation thereof. An inner gland and an outer gland are provided at one end of the shaft where the shaft exits the casing. Each of these glands support seals in close proximity with the shaft for preventing steam from escaping the casing. The inner gland is supported within an aperture in the casing where the shaft exits, and the outer gland is attached to an outer surface of the casing surrounding the aperture. The arrangement further includes an annular seal plate which circumscribes the turbine shaft and has an inner radial portion attached to an outer surface of the inner gland. An outer radial portion of the annular seal plate is cantilevered from the inner attached portion. The outer radial portion contacts an axially inner surface of the outer gland when this gland is attached to the casing. The outer gland exerts a deflecting pressure on the annular seal plate to provide a positive seal between the inner gland and the outer gland.