Construction of Hartnell Governers –
Parts of Hartnell Governor:
- Bellcrank lever
This is provided with a spring inside which protects and supports it and the frame is connected to the bell crank lever which rotates along with the lever.
These are placed on the bell crank lever which is done with some specified weight.
This is used to rotate along with the balls provided on it and it is connected to the frame to rotate it.
This is proved on the top of the frame, which used to adjust the force on the sleeve.
This is used to apply the pressure on the sleeve whenever required and this helps to push the sleeve downwards when it raised more than the required.
This provided on the top of the sleeve to support the spring on it.
This used to move in an upward and downward direction according to the rotation of the bell crank lever attached to it. and this helps to flow the required amount of fluid into the engine when it raised above from the bottom point.
Working of Hartnell Governors :
The sleeve moves up and down depending on the governor’s speed. When the speed of the governor/ engine increases, the ball tends to fly outward from the axis of the governor, but the ball’s movement is constrained. The bell crank lever moves on a pivot, roller end of lever lifts the sleeve upward against the spring force. This movement transferred to the throttle valve through a suitable mechanism, the result is low fuel supply and decreasing speed.
Advantages of Hartnell governor
- It can be operated at very high speed
- Smaller in size
- Very close regulation
- Pre-compression can be adjusted to give the required equilibrium speed.
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