Key to above figure:
1- Piston crown
2- Top piston rings
3- Piston skirt
4- Spray plate
5- Piston rod
6- Oil pipe to spray plate
7- Compression shim
8- Crosshead pin
9- Elastic bolt
EN – Inlet slot (groove)
KO – Piston cooling oil
OR- Oil return from working piston
SO- Spray oil
Piston cooling
The piston crown is cooled by bearing lubricating oil. The piston cooling oil ’KO’ is fed from crosshead pin into the two inlet slots ’EN’. From here it flows outside the oil pipe 6 (arranged in the piston rod) till spray plate. The cooling oil is sprayed into the cooling bores of the piston crown through nozzles in the spray plate. From there the oil ’OR’ flows through oil pipe into the crosshead pin from where it emerges sideways.
