Question
Download Solution PDFIn the porter governor, the main constituent of controlling force is:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Governors are classified as:
- Centrifugal Governor
- Inertia Governor
Centrifugal Governors are classified as:
- Dead Weight Governors:
- Porter governor
- Proell governor
- Spring controlled governors:
- Hartnell governor
- Hartung governor
- Pickering governor
Porter governor
A Porter governor is a type of centrifugal governor used in steam engines to regulate the engine's speed by adjusting the position of the throttle valve. It is an improvement upon the simple Watt governor by adding a central load, known as the sleeve or central weight, to increase the sensitivity and stability of the governor.
The Porter governor operates based on the principle of centrifugal force. As the engine speed increases, the flyballs (masses attached to the arms of the governor) move outward due to the increased centrifugal force. This outward movement raises the central sleeve, which is connected to the throttle valve. The movement of the sleeve adjusts the throttle valve, thereby controlling the steam flow to the engine and regulating its speed.
Main Constituent of Controlling Force: The main constituent of the controlling force in a Porter governor is the mass of the sleeve (option 4). The sleeve's mass provides a downward force that counters the upward centrifugal force exerted by the flyballs. The equilibrium between these forces determines the position of the sleeve and, consequently, the throttle valve's position.
Last updated on Jul 15, 2025
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