Centrifugal Governor
Types of Centrifugal Governor
- Pendulum type — Watt governor (simplest)
- Loaded type
Porter Governor
If the sleeve of a Watt governor is loaded with a heavy mass, Wilson Hartnell Governor has a heavy mass; it becomes a Porter governor.
Let, M = Mass of the sleeve; f = Force of friction at the sleeve; θ = Angle between arm and spindle axis; β = Angle
between link and spindle axis
Proell Governor
A Porter governor is known as a Proell governor if the two balls (masses) are fixed on the upward extensions of the lower links which are in the form of bent links BAE and CDF shown in the below figure.
Hartnell Governor
In this governor, balls are controlled by a spring.
Pickering Governor
Let,
m=Mass fixed to each spring
e=Distance between spindle axis and centre of mass when the governor is at rest
ω=Angular speed of the sleeve
δ=Deflection of the centre of the leaf spring for spindle speed ω
E = Modulus of elasticity of the spring material
I = Moment of inertia of the cross-section of the spring about neutral axis = bt3/12, b and t being the width and the
thickness of the leaf spring.
Centrifugal force, F = m(e + δ)ω2
Assume leaf spring is a beam of uniform cross section fixed at both ends and carrying a load at the centre.
Pickering governor is used in gramophone.
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