Category: Governors And Flywheel

  Differences Between Flywheel and Governors Flywheel Governors It is provided on the engine and fabricating machines, viz., rolling mills, punching machines, shear machines, presses, etc.Its function is to store available mechanical energy when it is in excess of the load requirements and to part with the same when the available energy is less than…

Governing is an action to control the fuel supply so that the engine runs at practically constant speed. When load on an engine increases the speed drops and when load decreases the speed increases. Thus to control the fluctuation in engine speed, fuel requirement increases during increasing load and fuel requirement decreases during decreasing load.…

A governor is said to be sensitive, if change of speeds from no load to full load may be as small a fraction of the mean equilibrium speed as possible and the corresponding sleeve lift may be as large as possible. Sensitiveness of a governor can be found by dividing the difference between maximum and…

14.7.1  Hartnell Governor The Hartnell governor is shown in Figure 14.7(a). The two bell crank levers are used which can rotate about fulcrums O and O′. One end of both bell crank lever carries a ball and a roller at the other end of the arm. The rollers make contact with the sleeve. A helical spring is mounted on the spindle…

14.6.1  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 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…