Porter Governor - Working 3D Animation

Porter Governor
Porter Governor is a type of centrifugal governor used to maintain a constant set speed limit in a steam engine. It is loaded dead weight type.
Porter governor is a modification of Watt’s governor, with central load attached to the Sleeve. The load moves up and down along with the sleeve on the main spindle. This additional downward force increases the speed of revolution required to enable the balls to rise to actuate the valve.
Speed variation occurs when there are changes in the load driven by the engine.
When the load on the engine increases, its speed decreases hence the supply of steam should be increased to reach the set speed limit.
Similarly when the load on the engine decreases, its speed increases hence the supply of steam should be decreased to reach the set speed limit.
The governor automatically controls the supply of working fluid to the engine with the varying load conditions and keeps the mean speed within the set limits.