Governors

The function of a governor is to regulate the mean speed of an engine, when there are
variations in the load e.g. when the load on an engine increases, its speed decreases, therefore it becomes necessary to increase the supply of working fluid. On the other hand, when the load on the engine decreases, its speed.
required. The governor automatically controls the supply of working fluid to the
engine with the varying load conditions and keeps the mean speed within certain
limits.

2. Types of Governors
The governors may, broadly, be classified as
1. Centrifugal governors, and 2. Inertia governors.
The centrifugal governors, may further be classified as follows :
3. Terms Used in Governors
The following terms used in governors;
1. Height of a governor. It is the vertical distance from the center of the ball to a point where the axes of the arms (or arms produced) intersect on the spindle axis. It is usually denoted by h.
2. Equilibrium speed. It is the speed at which the governor balls, arms etc., are in complete equilibrium and the sleeve does not tend to move upwards or downwards.
3. Mean equilibrium speed. It is the speed at the mean position of the balls or the sleeve.
4. Maximum and minimum equilibrium speeds. The speeds at the maximum and minimum radius of rotation of the balls, without tending to move either way are known as maximum and minimum equilibrium speeds respectively.
5. Sleeve lift. It is the vertical distance which the sleeve travels due to change in