Inertial Governors

Inertial Governors

Inertia Governor : In inertia governors, the balls are arranged in manner that the inertia forces caused by angular acceleration or retardation of the governor shaft tend to change their position.

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 increases and thus less working fluid is 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.

Inertia governor is more sensitive than the centrifugal, but it becomes difficult to completely balance the revolving parts. For this reason centrifugal governors are more frequently used.

Inertia Governor :

In inertia governors, the balls are arranged in manner that the inertia forces caused by angular acceleration or retardation of the governor shaft tend to change their position. The obvious advantage of inertia governor lies in its rapid response to the effect of a change of load. This advantage is small, however by the practical difficulty of arranging for the complete balance of the revolving parts of the governor. For this reason Centrifugal governors are preferred over the inertia governors.

This type of governors is connected to the crankshaft or flywheels of an engine. The Governor balls are arranged in such a way that the angular acceleration and deceleration of this shaft tend to move their position. Similar to spring loaded centrifugal governors, a suitable spring is provided to control the amount of displacement of governor balls.

• The inertia governor is more sensitive; the response rate of an inertia governor is faster than the centrifugal governor.
• Why are centrifugal governors most widely used? Because it is easy to balance the revolving part of a centrifugal governor.

Flywheel:

A flywheel is a rotating mechanical device that is used to store rotational energy. Flywheels have an inertia called the moment of inertia and thus resist changes in rotational speed. The amount of energy stored in a flywheel is proportional to the square of its rotational speed. Energy is transferred to a flywheel by the application of a torque to it, thereby increasing its rotational speed, and hence its stored energy. Conversely, a flywheel releases stored energy by applying torque to a mechanical load, thereby decreasing the flywheel’s rotational speed.

Common uses of a flywheel include:

• Providing continuous energy when the energy source is discontinuous. For example, flywheels are used in reciprocating engines because the energy source, torque from the engine, is intermittent.
• Delivering energy at rates beyond the ability of a continuous energy source. This is achieved by collecting energy in the flywheel over time and then releasing the energy quickly.
• Controlling the orientation of a mechanical system.

Thanks for visiting