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Why turning gear is so important on startup and stopping on steam turbine operation?

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Question added by SARATH S , Rotary Equipment Engineer , Powerrich Engineering Erectors Pvt ltd
Date Posted: 2017/05/09
Solomon Teferi
by Solomon Teferi , Assistant Professor , Currently Addis Ababa University

Turning gear is to ensure uniform cool down of the steam turbine’s shaft. Its occurrence protects from sagging/bending of the turbine rotor.

Mohammed Ibrahim
by Mohammed Ibrahim , Senior Engineer , Coastal Energen Private Limited

During Start up giving steam(Initial torque) directly can create load on turbine and can cause damage in the turbine .

During Stopping Purpose,Turbine is at a very high temperature and can cause sagging (wobbling) if not it will rub the seals and cause damage to seals and Rotor blades.

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