CLASSIFICATION OF GOVERNORS

The classification of governors is shown in Figure 14.3.

Figure 14.3 Classification of Governors

• Inertia and flywheel governors: In these governors, the inertia forces caused by the angular acceleration of the engine shaft or flywheel by change in speed are utilized for the movement of the balls. The movement of the balls is due to the rate of change of speed instead of change in speed itself as in case of centrifugal governors. Thus, these governors are more sensitive than centrifugal governors.
• Centrifugal governors: In these governors, the change in centrifugal forces of the rotating masses due to change in the speed of the engine is utilized for movement of the governor sleeve.
• Pickering governors: This type of governor is used for driving a gramophone. As compared to the centrifugal governors, the sleeve movement is very small. It controls the speed by dissipating the excess kinetic energy. It is very simple in construction and can be used for a small machine.