Turbines And Motors Flashcards
Condensate
Moisture produced one steam, hot gases, or vapors condense (change to liquid state).
Exhaust valve
Valve used to block steam turbine outlet steam.
Gas turbine
A device that uses high-pressure gases to turn a series of turbine wheels to provide rotational energy to turn an axle or shaft.
Governor
Speed control device to adjust the governor valve.
Heat soaking
A turbine warm-up procedure designed to remove condensate and warm the internal parts; includes slow rolling the turbine at low speeds between 200 and 500 RPMs.
Hunting
Occurs when a steam turbine speed fluctuates while the controller searches for the correct operating speed.
Hydraulic turbine
Advice that uses high pressure liquids to turn a turbine wheel attached to a pump generator.
Impulse turbine
A steam turbine with a blading design that causes rotation of the blades and shafts when high velocity steam from an external source pushes on it.
Journal bearing
Radial bearings
Labyrinth seal
A shaft seal designed to stop steam flow in a steam turbine; consist of a series of ridges and intricate paths.
Nozzle
A device designed to restrict flow and convert pressure into velocity.
Overspeed trip
A safety device used to shut down a steam turbine when it exceeds its rotational speed limit by closing the turbine trip valve.
Reactive turbine
A steam turbine with a fixed nozzle and an internal steam source.
Sentinel valve
A spring loaded automatic relief valve that makes a high-pitch noise one turbine speed approaches the design maximum.
Slow roll
Controlling turbine speed at low (200-500) RPMs.
