## Flywheel: Definition, Function, , Working Principle, Construction, Material, Advantages, Application

A flywheel is a mechanical device which uses the conservation of angular momentum to store rotational energy; a form of kinetic energy proportional to the product of its moment of inertia and the square of its rotational speed. In particular, if we assume the flywheel’s moment of inertia to be constant (i.e., a flywheel with fixed mass and second moment of area revolving about some fixed axis) then the stored (rotational) energy is directly associated with the square of its rotational speed.

Since a flywheel serves to store mechanical energy for later use, it is natural to consider it as a kinetic energy analogue of an electrical inductor. Once suitably abstracted, this shared principle of energy storage is described in the generalized concept of an accumulator. As with other types of accumulators, a flywheel inherently smoothes sufficiently small deviations in the power output of a system, thereby effectively playing the role of a low-pass filter with respect to the mechanical velocity (angular, or otherwise) of the system. More precisely, a flywheel’s stored energy will donate a surge in power output upon a drop in power input and will conversely absorb any excess power input (system-generated power) in the form of rotational energy.

Flywheel attachment

Typically, a flywheel is attach to the crankshaft flange with bolts that are heat treat or ground. The castellate nuts screw onto these bolts are thoroughly split. The mold from the mounting holes on the flywheel and in the flange is circumferentially offset by several degrees, which ensures the exact connection of the flywheel and the crankshaft if for some reason they were disassembled. In diesel engines, the flywheel is fastened with bolts that are screw directly into the crankshaft. In this case, the flywheel is precisely fix relative to the necks of the crankshaft with two pins.

The PDF contain Flywheel: Definition, Function, , Working Principle, Construction, Material, Advantages, Application

• What is the definition of a Flywheel?
• Functions of flywheel:
• Flywheel Construction or Parts:
• Structure of a Modern Flywheel:
• How does Flywheel Works?
• Different Types of flywheel:
• Materials used for making Flywheel:
• Steel:
• GFRP: