Controlling Force in Governor:

Controlling force is defined as the force that opposes or resists the movement of the balls in the governor system. It is the force required to balance the centrifugal force acting on the balls of the governor. The controlling force is provided by the spring or weight attached to the sleeve of the governor.

Working of Governor:

The governor is a device used to control the speed of the engine or prime mover. It works on the principle of centrifugal force. The centrifugal force acting on the balls of the governor is proportional to the square of the speed of the engine. As the speed of the engine increases, the centrifugal force acting on the balls also increases, causing the balls to move outwards. The outward movement of the balls is transmitted to the sleeve of the governor, which in turn controls the fuel supply to the engine.

Role of Controlling Force:

The controlling force is required to balance the centrifugal force acting on the balls of the governor. If the controlling force is less than the centrifugal force, the balls will move outwards, causing the engine to run at a higher speed. On the other hand, if the controlling force is more than the centrifugal force, the balls will move inwards, causing the engine to run at a lower speed.

Types of Controlling Force:

The controlling force can be provided by a spring or weight attached to the sleeve of the governor. The spring-controlled governor is used in engines where the load is constant, while the weight-controlled governor is used in engines where the load varies.

Conclusion:

In conclusion, the controlling force is an important force in the governor system. It is required to balance the centrifugal force acting on the balls of the governor, thereby controlling the speed of the engine. The controlling force is provided by a spring or weight attached to the sleeve of the governor.