Join 60,000+ competitive exam aspirants
or with email
Your Cart
Subtotal₹0
Total₹0
Examoogle • User • info@examoogle.com • EE-2024-8821
Chapter 1 of 12 • Page 1 of 248🔒 Protected PDF • Watermarked
Join 60,000+ competitive exam aspirants
In fly ball speed governor, The increase in speed results in
Fly ball move outwards
Fly ball move inwards
Fly ball remain in same position
None of above
Fly ball move outwards
Quick Summary: In a flyball governor, the flyballs are mounted on a rotating spindle such that their radial position is determined by the balance between centrifugal force and control force. As the speed of the engine increases, the centrifugal force acting on the balls increases, causing them to move radially outwards.
In a flyball governor, the flyballs are mounted on a rotating spindle such that their radial position is determined by the balance between centrifugal force and control force. As the speed of the engine increases, the centrifugal force acting on the balls increases, causing them to move radially outwards.
Fc=m⋅r⋅ω2 — Centrifugal force acting on the governor ball
Fg=m⋅g — Gravitational force acting on the governor ball
The governing mechanism relies on the centrifugal force Fc=m⋅ω2⋅r. When the shaft speed ω rises, the outward force Fc overcomes the weight of the balls or the counteracting spring force, forcing the balls to swing outward. This movement is transmitted via a sleeve to the fuel control valve, which reduces the engine's energy input to maintain the set speed.
The governor is a sensing device that regulates the fuel supply to an engine to maintain constant speed.
Centrifugal force is directly proportional to the square of the angular velocity (Fc∝ω2).
The displacement of the flyballs is converted into mechanical motion via a sliding sleeve.
Simple mechanical construction
Effective at maintaining engine load stability
Susceptible to friction in joints
Has a 'dead band' where no control action occurs
Steam engines
Internal combustion engine speed regulation
The outward movement of the balls lifts a central sleeve, which is linked to the throttle valve or fuel rack.
Option B (inward movement) occurs when the engine speed decreases, reducing centrifugal force.
The governor is a proportional controller in its simplest form.
A is correct — The increase in rotational speed raises the centrifugal force on the flyballs, forcing them to move radially outwards.
Always relate governor action to the balance of forces; if speed ↑, centrifugal force ↑, hence displacement ↑. This is a fundamental concept in control systems.