Class Flashcards
(36 cards)
A governor by definition is
An automatic attachment for controlling speed
A governor by definition is
An automatic attachment for controlling speed
When a governor regulates a turbine by itself in isochronous form, it has speed droop true or false
False
Name four parts of a simple governor
Bald head, pilot and relay valve, servo motor, restoring mechanism
Name four parts of a simple governor
Bald head, pilot and relay valve, servo motor, restoring mechanism
What is the function of the pilot valve?
The function of the pilot valve is to provide hydraulic force that operates the relay valve
From which device does the governor get its sensitivity from?
The flyball
Which device is used to achieve stability within the governor system?
The compensating dashpot is used to achieve stability
Which device is used to achieve stability within the governor system?
The compensating dashpot is used to achieve stability
A generator with 5% speed droop applied senses a change in load true or false
True
A compensating dash pot has two pistons and
A needle valve
What is the function of the vibrating discs on the governor?
To reduce the sticking of the pilot valve and provide more sensitivity
Name four safety devices on the generator
The over speed device, low oil, pressure, switch, nozzle, deflectors, broken belt device
The auxiliary valve is used to
Manually operate the servo motor
What is the function of the restoring mechanism on the governor?
To re-center the pilot valve in its neutral position
What is the function of a permanent magnet generator on the turbine?
To supply electrical power to operate the ball head motor
Where is the speeder spring located on the governor?
It is located next to the fly ball
What is the function of the gate limit device?
D all of the above
the Gov ball head has to spin at the same speed as the PMG. True or false
False
The relay valve is positioned or operated by
The pilot valve
What are the principle parts of a governor oil system?
Reservoir, accumulator, pump, and piping system
The auxiliary valve provides control to the servo motor during these times
For maintenance purposes
If a load on the turbine suddenly is rejected the ball head will
Increase speed immediately
If load on the turbine suddenly increases, what will the floating lever do?
The upper floating lever will rise up