Speed/impact sub monitoring device

Speed is an important operating monitoring parameter for steam turbine units. When the unit speed reaches 110% of the rated speed, the steam turbine should be shut down urgently. To achieve this goal, the unit security system is equipped with an emergency governor in the front bearing box of the steam turbine. The emergency governor impactor is "ejected" by the centrifugal force generated at 110% of the rated speed, which can cause the steam turbine to shut down urgently.