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Difference between Flywheel and Governor
FLYWHEEL
GOVERNOR
1.Function- To control the speed variations 1.Function- To regulate the mean speed of
caused by fluctuations of engine turning engine within prescribed limit when there
moment during a cycle. are variations of load.
2. Flywheel acts as a reservoir; it stores 2. A governor regulates the speed by
energy due to its mass moment of inertia regulating the quantity of charge/working
and releases energy when required during a fluid of prime mover.
cycle.

Multi – Plate clutch consists of a number of clutch plates instead of only one clutch plate like in
the Single plate clutch.
Friction surface also increased because of a number of clutch plates. Because of number of
friction surfaces, the capacity of the clutch to transmit torque is also increased.
The plates are alternately fitted to the engine crankshaft and gearbox shaft. They are firmly
pressed by strong coil springs and assembled in a drum type casing.

Given data m 1 = 100N, m 2 = 200 N , m 3 = 150 N , r 1 = 0.3m , r 2 = 0.15 m, r 3 = 0.25m
Radius of rotation = r= 0.2m

Balancing force is equal to resultant force
So, m x r = 63
m x 0.2 = 63
m = 315 N
Measurement θ = 60 0

Compound Gear Train:
When there are more than one gear on a shaft, as shown in Fig. , it is called a compound
train of gear. In a simple train of gears do not affect the speed ratio of the system. But these gears
are useful in bridging over the space between the driver and the driven.
Gear trains inside a mechanical watch
But whenever the distance between the driver and the driven or follower has to be bridged
over by intermediate gears and at the same time a great ( or much less ) speed ratio is required,

Let OC be the crank and PC the connecting rod of a reciprocating steam engine, as shown in Fig.
Let the crank makes an angle θ with the line of stroke PO and rotates with uniform angular
velocity ω rad/s in a clockwise direction. The Klien’s velocity and acceleration diagrams are
drawn as discussed below:

(i) Kinematic link: Each part of a machine, which moves relative to some other part, is known as a
kinematic link.
(ii) Kinematic pair: The two links or elements of a machine, when in contact with each other, are said to
form a pair. If the relative motion between them is completely or successfully constrained (i.e. in a
definite direction), the pair is known as kinematic pair.
(iii) Kinematic chain: When the kinematic pairs are coupled in such a way that the last link is joined to the

The weights of four masse A, B, C, D are 200 Kg, 300 Kg, 240 Kg and 260 Kg
respectively. The corresponding radii of rotation are 200 mm, 150 mm, 250 mm and
300 mm respectively and the angle between successive masses are 45o, 75o and
135o. Find the position and magnitude of the balance weight required if its radius of
rotation is 200 mm.

OR