The Pickering Governor is spring controlled load governor categorised under the centrifugal governors. We have discussed the Hartung Governor, Hartnell governor and Wilson-Hartnell Governor in the previous articles, which are also the spring-loaded governors with which have different construction and working principle from this type of governor.
Pickering Governor is spring-loaded governor as we have mentioned, instead of the helical springs, leaf springs were used in this governor. Here also this governor works on the centrifugal working principle.
Construction and Working of Pickering Governor
It consists of three straight leaf springs arranged at equal angular intervals around the spindle. Each spring carries weight at the centre. The weights move outwards and the springs bend as they rotate about the spindle axis with increasing speed. Below is the schematic diagram of the Pickering Governor. In the below schematic diagram, only two leaf springs were shown to understand it better.
The position (a) in the above schematic diagram represents when the governor is at rest and the position (b) represents when the governor is running.
- While the engine is running at higher speeds the leaf springs will bend and lift the sleeve until this sleeve hits the stop bar.
- This stop bar is the nominal speed adjustment. it can be adjusted vertically to adjust the nominal (Equilibrium) speed of the engine.
- When the sleeve moves, it controls the fuel supply passage. at engine higher speeds it will pass less fuel amount and in low speeds, due to load on the engine, it will supply the more amount of the fuel.
This is how the Pickering_Governor works to govern the fuel supply and regulates the mean speed of the engine when there is a variation in the load.
We have discussed the Pickering_Governor, its construction and working principle. If you have any further thoughts on this topic, let us know in the comment section below.