What is the Function of a Flywheel?

In summary, the problem involves finding the mean diameter and cross-sectional area of a cast iron flywheel that must handle a fluctuation of 22500 J at a mean speed of 6 rev/s with a limit of +- 0.5% on speed variation. The maximum centrifugal stress cannot exceed 5.5 MN/m2. The equation used is greatest fluctuation of energy=IaW2, where I is the moment of inertia of the flywheel. The solution is a mean diameter of 1464 mm and a cross-sectional area of 0.089 m2.
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Homework Statement


This problem from Applied mechanics J Hannah M J Hilier
An engine flywheel consist essentially of a ring of cast iron of density 7200 kg/ m3 .The flywheel has to deal with a fluctuation of energy of 22500 J at mean speed of 6 rev/s with a limit of +- 0,5 per cent on variation in speed .The maximum centrifugal stress in flywheel is not to exceed 5.5 MN/m2 .Find mean diameter and cross-sectional area of the rim .
answers Deameter mean=1464 mm area =0.089 m2



Homework Equations


greatest fluctuation of energy=IaW2


The Attempt at a Solution


stress=density *[angular velocity]square * [radius mean]square
 
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  • #2
I=moment of inertia of flywheel =[mass]*[radius mean]square22500=7200*[2pi/6]square *[radius mean]squareradius mean=1463.9 mmdiameter mean=2927.8 mmarea= pi*[radius mean]square=0.089 m2
 

FAQ: What is the Function of a Flywheel?

What is a flywheel?

A flywheel is a mechanical device that stores rotational energy. It consists of a heavy wheel or disc that is mounted on a rotating shaft and is used to regulate the speed of a machine by storing energy when the machine is operating at high speeds and releasing it when the machine is operating at lower speeds.

What is the function of a flywheel?

The function of a flywheel is to maintain a constant speed and smooth out fluctuations in the rotational energy of a machine. It also helps to provide the necessary power and torque to keep the machine running during times of high demand or when there is a sudden decrease in power supply.

How does a flywheel work?

A flywheel works by utilizing the principle of conservation of energy. When the machine is operating at high speeds, the flywheel stores energy in the form of rotational kinetic energy. This energy is then released when the machine is operating at lower speeds, helping to maintain a constant speed.

Where are flywheels commonly used?

Flywheels are commonly used in various machines and engines such as cars, trains, and generators. They are also used in industrial equipment, such as presses and saws, to regulate the speed and provide smooth operation.

What are the benefits of using a flywheel?

The use of a flywheel in a machine provides several benefits, including energy storage, speed regulation, and stability. It also helps to reduce wear and tear on the machine's components, making it more durable and efficient.

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