Governors Flashcards
A basic overspeed mechanical trip pin is held in the normal running condition by?
Spring compression force being greater than the centrifugal force acting on the pin.
A hydraulic overspeed trip is usually activated by?
A mechanically operated trip pin.
______________ is a governor characteristic that prevents hunting.
Stability
Referring to the modern flyweight type of mechanical governor, what counterbalances the centrifugal force of the flyweights when the system is balanced?
Compression on the speeder spring.
Referring to a simple mechanical-hydraulic governor, what do the mechanical flyweights control directly in order to be capable of adjusting the speed?
Spool valve
The simplest means of supplying stability to a mechanical-hydraulic governor is to add?
Speed droop
An increase in shaft speed of the prime mover will cause the hydraulic pump to?
Increase the flow
What part of the system controls the final movement of the fuel control rod?
Servo piston
What are the two most common types of throttle valve governors?
Automatic or Vacuum, and centrifugal.
What is a governor?
A Device that will automatically control the speed of a prime mover under varying conditions of load
In a diesel engine what does the governor do to meter more or less fuel?
It adjust the fuel rack
On a Steam turbine what does the operating speed control or governor actuate?
It will actuate the steam valves to speed up or slow down the turbine
Isochronous is another term for?
Constant speed governing
