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How does a servomotor work in a steam turbine?
In a steam turbine, the servomotor is a hydraulic actuator that controls the steam control valves. The governor or electronic control system monitors turbine speed and load. When adjustment is required, it sends a signal to a pilot valve, which directs high-pressure oil to one side of the servomotorRead more
In a steam turbine, the servomotor is a hydraulic actuator that controls the steam control valves. The governor or electronic control system monitors turbine speed and load.
When adjustment is required, it sends a signal to a pilot valve, which directs high-pressure oil to one side of the servomotor piston and drains oil from the other side. The resulting pressure difference moves the piston, which is mechanically linked to the steam valve.
This changes the valve opening, regulating steam flow and turbine power. It provides precise, continuous control, and loss of oil pressure typically causes the valves to close for safety.
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