Parts of a Diesel Engine

Parts of a Diesel Engine

1. Stationary Parts of a Diesel Engine Lisan Taha açin Ytu marine engineering Part 1 Diesel Generator

2. Stationary Parts PURPOSE: to support running parts to keep them in position and line to provide jackets and passages for cooling water, sumps, for lube oil to form protective casing for running parts to support auxiliaries (valves, camshaft, turbo blowers

3. Stationary Parts B edplate A-F rame or column E ngine or cylinder block C ylinder liners C ylinder head or cover Guides Stuffing box Tie Rod

4. Bed Plate Support the weight of the rest of the engine, and maintain the crankshaft, which sits in the bearing housings in the transverse girders, in alignment. At the same time it must be flexible enough to hog and sag with the foundation plate to which it is attached and which forms part of the ships structure. If the bedplate was too rigid, then as the hull flexed, the holding down bolts, which secure the engine into the ship would be likely to break, and there would be a danger of the bedplate cracking

5. load-carrying part of an engine I t may include parts as the cylinder block,base, sump and end plates I n two-stroke engines, frames are sometimes known as A-frames A-frame carry the crosshead guides and support the engine entablature A- Frame

6. Cylinder Block The cylinder block is generally a single unit made from cast iron . In a liquid-cooled diesel,the block also provides the structure and rigid frame for the engine’s cylinders,water coolant and oil passages , and support for the crankshaft and camshaft bearings .

7. Cylinder Liner A  cylinder liner  is a cylindrical part to be fitted into an  engine  block to form a cylinder . It is one of the most important functional parts to make up the interior of an engine . Two types liners ; A  wet line r cylinder walls that are entirely removable, which fit into the cylinder my means of gaskets. They are called wet liners as their outer surface come in direct contact with the engine coolant. i.e   here the liner is the entire wall not just a sleeve. Dry liner  designs use either the block's material or a separate liner inserted into the block to form the backbone of the cylinder wall. Additional sleeves are inserted within, thus dry on their outer surface.

8. Cylinder Cover The cylinder head is fixed onto the cylinder block through the use of big bolts which are sufficient to withstand the various forces. They also help to transfer to gas forces acting on the cylinder head to the bedplate via the cylinder block and ultimately are passed on to the hull of the ship. T he space at the combustion chamber top is formed and sealed by a cylinder head . T he cylinder head of a four-stroke engine houses intake and exhaust valves, the fuel injection valve, air starting vale, safety valve .

9. Guides By taking the longitudinal gas forces on its body which is coming from the piston reduces the liner wearing.

10. Stuffing Box The unique feature of a slow speed two stroke engine is the sealing between the dirty combustion part and the clean crankcase. The heart of this division is the piston rod stuffing box. The combination of scraper and sealing rings and lamella scraper rings solves three vital tasks: Impurities from the scavenging air space are prevented from entering the crank case housing. A pressure-tight seal is created between the scavenging air space and the crank case. System oil waste is reduced to a minimum.

11. References Prof.Dr.Adnan Parlak