Steam turbines

Question 1

Fly ball governor

Answer 1

Consists of a flyball and governor spring. centrifugal force, forces flyball weights outwards creating tension on the govenor spring that closes the steam regualtion valve

Question 2

Overspeed trip system

Answer 2

Incase of governor failure prevents over speeding, consists of separate independent counter weights which acts against the governor spring to trigger a trip which shuts the steam inlet valve. needs to reset manually.

Question 3

hunting

Answer 3

Where controller searches for set point in a fluctuating manner. Caused by mechanical linkages binding, This can be fixed by correct, regular lubrication