SYSTEM AND METHOD FOR HEATING AND COOLING OFSUPERALLOY TEST ROTORS OF STEAM TURBINES OPERATING AT CRITICAL PARAMETERS

摘要

A testing apparatus for testing super alloy turbine rotor (1) by heating and cooling, the apparatus comprising of: a heating system (22) that comprises of an electric heater arrangement (14) in an enclosure (13), a vacuum system (8) to sustain pressure and allow heat transfer, an operational logic to control the heat flow of the heating system and control the vacuum system (8), associated electronics to monitor the heating process; a cooling system (20) comprising a gas inlet header (2) to stream cold gas monitored and controlled by a flow indicator (10), a gas outlet header (3) to receive the gas expelled from the super alloy turbine rotor (1) by means of a blower (5), an operational logic to control the flow of cooling; a heat exchanger (21) to cool and reutilize the exiting gas; a gas storage system (7); protection means to prevent explosion; wherein the heating and cooling of the super alloy turbine rotor (1) simulates accelerated low cycle fatigue and creep damage.