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Tendances
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Similaire à Provides strength and alignment with a simple cast or welded design
Similaire à Provides strength and alignment with a simple cast or welded design (20)
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Dernier (20)
Provides strength and alignment with a simple cast or welded design
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- Diesel Engine Construction Stationary Components Purpose of block Provide Strength with relatively simple design. Supports and aligns internal parts. Location Engineroom Main Propulsion Ship’s Service Diesel Generator (SSDG) Emergency Diesel/Auxiliary Machinery Room Used to supply power for emergency electrical generator and in some cases, Fire Pumps
- Diesel Engine Construction Stationary Components En-Bloc or Cast: the block is cast in one piece of aluminum or cast iron and is used in medium speed applications. Used mainly on small applications such as boats, emergency generators and pumps Usually no longer than 6 in line cylinders, or 8 V cylinders Some applications have 2 or more blocks bolted together All contain internal oil passages to distribute oil from the pump to the moving parts inside the engine
- Diesel Engine Construction Stationary Components Steel plates are cut and welded vertically and horizontally to construct the frame. A jig is used to hold and align the pieces while they are welded. Some engines contain oil and water passages welded into the frame work, while others have removable pipes or tubing. This type of construction is used for larger engines such as Alco, Fairbanks-Morse, General Motors, and Colt-Pielstick. The barrel or bore the piston moves in may be either an integral part of the main block or may be a separate liner.
- Diesel Engine Construction Stationary Components Purpose- Allows individual cylinder bores to be replaced when they become worn. Cylinder liners are inserts placed inside the cylindrical holes in the block.
- Diesel Engine Construction Stationary Components Water is in contact with some part of the liner. The wall of the liner is thicker than the dry type, and water circulating in the block comes in contact with the outside surfaces of the liner.
- Diesel Engine Construction Stationary Components Purpose: Serves as a housing for the crankshaft. Incorporates the bolting flanges, lower main bearing saddles and an oil trough.
- Diesel Engine Construction Stationary Components Purpose: Collects and holds the engine lube oil. Location: Sumps are usually attached directly to the bottom of the engine.
- Diesel Engine Construction Stationary Components Purpose- Adds rigidity to the block. Provides a mounting surface for parts such as gears, pumps, blowers, and generators. Location- Attached to each end of the cylinder block
- Diesel Engine Construction Stationary Components Also referred to as inspection covers or hand hole covers. Usually secured with a hand wheel or nut operated clamps and are fitted with gaskets to keep dirt and foreign material out of the engine. On some engines, the covers are constructed to serve as safety devices. The covers are equipped with a spring loaded pressure plate which keeps the plate sealed under normal operating conditions. In the event of a crankcase explosion or extreme pressure in the crankcase, the pressure overcomes the spring tension, and the plate acts as a safety vent.
- Diesel Engine Construction Stationary Components Greater variation in design than any other single element of an engine. Purpose – Forms a seal for the combustion space. Constructed of cast alloy iron, or aluminum. Each cylinder may have individual heads or cylinders may share heads. Location – bolted to the top of the cylinder block.
- Diesel Engine Construction Stationary Components Heads may contain intake and/or exhaust valves, rocker arm assemblies, fuel injection valves and air starting valves. Cooling water passages are provided in the head to remove heat from the head, valves, and injector. Coolant is introduced from the block or liner into cored passages of the head
- Diesel Engine Construction Stationary Components Purpose To secure the engine to the ship. Can also be used to maintain alignment between the driven unit and the engine Location Beneath the bedplate or engine frame Types Solid – Bolted directly to the frame