Flywheel is a machine member which avoids the fluctuations of energy in an I.C. Engines (power plant) or in a reciprocating pumps & compressors.
👉 It doesn't maintain a constant speed, but only prevents fluctuations of energy.
👉 Flywheel doesn't have control over the supply of fuel.
Important Parts of flywheel :
- Hub
- Arms and
- Ribs
Applications :
⮞ Used in Steam Engine.
⮞ Used in I.C. Engine.
⮞ Used in Balancing of Reciprocating Compressor & Reciprocating Pump.
⮞ Used in Sewing Machine.
➤ Also used in Punching Press, etc...
NOTE :- In case of Engine -
Flywheel stores energy during expansion stroke (Power) & gives energy during suction, compression & exhaust stroke.
👉 When energy is stored in the flywheel, its speed increases.
👉 When energy is given by flywheel , its speed decreases.
Fluctuation of Energy :-
it may be defined as- the difference b/w the maximum and minimum energy in a flywheel.
∵ Fluctuation of energy = E1 - E2
where,
E1 = Maximum Energy
E2 = Minimum Energy
Coefficient of fluctuation of energy :-
It is the ratio of fluctuation of energy to the work done per cycle.
it is given by-
Ce =(E1 - E2 ) /Work done per cycle
Work done per cycle =T mean ❌ ፀ
where,
T mean = Mean Torque
ፀ = Crank Angle
Fluctuation of Speed:-
It is defined as - The difference b/w the maximum and minimum speed of the flywheel.
ஃ Fluctuation of speed = N1 - N2
= ω1 - ω2
where,
N1 = max. speed of flywheel in r.p.m.
N2 = min. speed of flywheel in r.p.m.
ω1 = max. angular speed (r/s)
ω2 = min. angular speed (r/s)
Coefficient of Fluctuation of Speed (Cs) :-
It is the ratio of fluctuation of speed to the average(mean) speed.
ஃ it is given by :-
Cs = (N1 - N2) /N = (N1 - N2) / [(N1 + N2) / 2]
where,
Cs = Coefficient of Fluctuation of Speed.
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