Shroud ring for an axial flow turbine
AssigneeAsea Brown Boveri AG
InventorFranz Kreitmeier
Life of this patent
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Abstract
In a device for sealing the gap between the rotor blades and the casing (2) of a turbomachine, configured with a conical profile (28), the rotor blades (6) are provided with circumferential shroud plates (11), which seal by serrations (12, 13, 14, 15) against the casing with the formation of radial gaps (16, 17, 18). The shroud plate (11), which is arranged at the end of the blade, has four throttle locations relative to the casing, the inlet end throttle location bounding a diagonal gap (19) and the outlet end throttle location forming a radial gap (16).
Claims9
A device for sealing the gap between the rotor blades and the casing of a turbomachine, configured with a conical profile, in which the rotor blades are provided with circumferential shroud plates, which seal by means of serrations against the casing with the formation of radial gaps, wherein the shroud plate, which is arranged at the end of the blade, has four throttle locations relative to the casing, the inlet end throttle location forming a diagonal gap in the steady-state operating condition.
Dependencies are inferred from the claim text.