FLYWHEEL PPT Flashcards
is a rotating member that acts as a storage reservoir for energy when work is not “consumed” at as fast a rate as the power is supplied.
A ___________ serves as a reservoir which stores 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 supply.
Flywheel
The kind of energy stored by the flywheel is __________.
kinetic energy
flywheel keeps the speed fluctuation within suitable limits and makes it possible to deliver work at an almost ___________.
constant rate
The difference in the maximum and minimum speeds during a cycle is called ___________.
maximum fluctuation of speed
The ratio of the maximum fluctuation of speed to the mean speed is called _____________________, denoted by ____
coefficient of fluctuation of speed, Cs
The reciprocal of coefficient of fluctuation of speed is known as ______________.
coefficient of steadiness
It is defined as the ratio of the maximum fluctuation of energy to the work done per cycle. It is usually denoted by CE.
Coefficient of Fluctuation of Energy
When a flywheel absorbs energy its speed increases and when it gives up energy its speed decreases.
Energy Stored in Flywheel
A flywheel consists of a rim, a boss or hub for fixing the
flywheel on to the shaft and a number of arms for supporting
the rim on the hub.
The major portion of the mass or weight of flywheel is
concentrated on the rim.
Stresses in a Flywheel Rim
The tensile stress in the rim due to the centrifugal force,
assuming that the rim is unrestrained by the arms, is
determined in a similar way as a thin cylinder subjected to
internal pressure.
Tensile Stress due to the Centrifugal Force
