Category: Advance Concept Mechanical Eng

The Proell governor has the balls at B and C to the extension of the links DF and EG, as shown in Figure 14.6(a). The arm PF and GQ are pivoted at P and Q, respectively. Consider the free body diagram of half of the governor as shown in Figure 14.6(b). The instantaneous centre (I) lies on intersection of…

A schematic diagram of the porter governor is shown in Figure 14.5. There are two sets of arms. The top arms OA and OB connect balls to the hinge O. The hinge may be on the spindle or slightly away. The lower arms support dead weight and connect balls also. All of them rotate with the spindle. We can consider one-half of…

Watt Governor This governor was initially used by James Watt in steam engine. The spindle is driven by the output shaft of the prime mover. The balls are mounted at the junction of the two arms. The upper arms are connected to the spindle and lower arms are connected to the sleeve as shown in Figure…

The classification of governors is shown in Figure 14.3. Figure 14.3 Classification of Governors

There are some general terms used in governors that describe qualities of governor. These terms are as follows:

Governor takes care of the change of speed due to load variation over periods of the engine’s running and tends to keep it as close to the mean speed as possible, where as the flywheel is responsible only in keeping the speed fluctuations, during each cycle within certain permissible limits of the mean speed. As…

The function of the flywheel is to store excess energy during power stroke and it supplies energy during other stroke. Thereby, it reduces fluctuation in the speed within the cycle. Let ω1 be the maximum angular speed and ω2 be the minimum angular speed. I be the mass moment of inertia of the flywheel neglecting mass moment of inertia of…

Flywheel is an internal energy storage device. It absorbs mechanical energy during the period when the supply of energy is more than the requirement and releases it during the period when the requirement of energy is more than the supply. The main function of a fly wheel is to smoothen out variations in the speed…