What is the Cause of Governor Hunting?
Governor hunting, also known as surge, is a phenomenon that occurs in centrifugal governors when the speed of the engine increases beyond a certain point. It is characterized by large and rapid oscillations in the governor's speed, which can cause instability and damage to the engine.
The primary cause of governor hunting is the inertia of the governor's moving parts. When the engine speed increases, the governor's flyweights move outward due to centrifugal force. However, the inertia of the flyweights prevents them from responding instantaneously to the speed change. As a result, the governor's speed overshoots the desired setpoint, causing the flyweights to move inward. This in turn causes the engine speed to decrease, and the process repeats itself.
The amplitude and frequency of governor hunting depend on several factors, including the size and weight of the flyweights, the stiffness of the governor spring, and the damping applied to the governor.
Causes of Governor Hunting
- Inertia of governor moving parts
- Incorrect governor spring stiffness
- Insufficient damping
- Unbalanced governor
- Faulty governor linkage
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