Hartnell Governor - Flywheel and Governors - Theory of Machine

TL;DR

Hartnell governor is a centrifugal governor that utilizes a spring mechanism to control the speed of an engine by regulating the supply of working fluid.

Transcript

Let us see the next kind of governor it is called as Hartnell governor Hartnell governor is also a type of centrifugal governor the difference in Hartnell governor and previously which we have seen potter and prevail governor is that in case of Porter and prowl governor we were having deadweight now that deadweight is replaced with a spring here so... Read More

Key Insights

• 🐎 The Hartnell governor utilizes a spring mechanism instead of deadweight to control engine speed.
• 🏋️ Centrifugal force causes the flyballs to move outwards, lifting a sleeve that restricts the supply of fuel to the engine.
• 🫷 When the engine speed decreases, the flyballs move inward, releasing stored spring energy and pushing the sleeve down to increase the fuel supply.
• 🎮 The Hartnell governor plays a crucial role in controlling engine speed by regulating the supply of working fluid.
• 😒 The use of a spring in the Hartnell governor allows for more flexibility and precise control compared to deadweight mechanisms.
• 🌸 The downward force from the spring complements the movement of the flyballs in adjusting the fuel supply.
• 🐎 The Hartnell governor is designed to maintain a constant speed of the engine, ensuring optimal performance.

Questions & Answers

Q: What is the main difference between Hartnell governor and previous types of centrifugal governors?

The main difference is that Hartnell governor replaces deadweight with a spring as a means of controlling engine speed.

Q: How does the Hartnell governor control the supply of working fluid to the engine?

When the flyballs move outwards due to centrifugal force, they lift a sleeve which restricts the fuel supply to the engine. When the flyballs move inward, the sleeve is pushed down, opening the fuel supply passage.

Q: What happens when the engine speed decreases in a Hartnell governor?

When the engine speed decreases, the flyballs move inward, releasing the energy stored in the spring. This, along with the downward force from the spring, pushes the sleeve down, opening the fuel supply passage and increasing the engine speed.

Q: How does the Hartnell governor maintain a constant engine speed?

The Hartnell governor maintains a constant engine speed by adjusting the supply of fuel based on the movement of the flyballs and the sleeve.

Summary & Key Takeaways

• The Hartnell governor is a type of centrifugal governor that replaces deadweight with a spring to control engine speed.

• As the spindle rotates, the flyballs move outwards due to centrifugal force, lifting a sleeve that restricts the supply of fuel to the engine.

• When the engine speed decreases, the flyballs move inward, releasing energy stored in the spring and pushing the sleeve down, opening the fuel supply passage and increasing the engine speed.