Patent ID: 9206707
Filing Date: 2015-12-08
Classification: F01D,F01K

Abstract:
1. A safety system for multiple turbine stages, said system for saturated steam applications comprising: an isolating system for isolating a plurality of turbine stages in a saturated steam application, and wherein the isolating system comprises a plurality of inter stage pipes, and wherein each inter stage pipe is connected between two successive turbine stages to transfer steam for one stage to another stage; a draining system connected to each seal housing, inlet casing, exit casing and each inter stage pipe to drain out a condensed steam lap or during a passage of steam from one stage to another stage, and wherein the draining system comprises a condensate pot for collecting and storing condensed steam vapors and a thermodynamic trap; and a control system for detecting and stopping high speed rotation of rotor disk in turbine assembly; and an abradable coating provided at an inner surface of a shroud which is arranged directly above a circular periphery of the rotor disk, and wherein the abradable coating is provided to prevent a metal to metal contact of blades of the rotor with the shroud, when the rotor strikes the shroud during a high speed rotation, wherein the abradable coating comprises a soft material, and wherein the soft material is phosphor bronze.