ME-GA engine description - Section 1.06 - ME-GA engine description

Oct 29, 2026

ME-GA engine description provides technical specifications and component-level descriptions for a marine engine, focusing on construction principles and interchangeability requirements under licensed manufacturing. It details the bedplate structure and oil pan arrangement, the design and service access of main bearings and bearing caps, and the welded frame box with relief valves and hinged cylinder-side doors. Further sections describe cylinder frame features, cylinder liner and cover design, crankshaft supply options, and the thrust bearing system including angular coverage.

LanguageEnglish

CategoryResearch & Report

FormatPDF

Pages9

Reading Time23 min

AccessFree to download

Bedplate and main bearing

Frame box

Cylinder frame and stuffing box

Cylinder liner

Cylinder cover

Crankshaft

Thrust bearing

Step-up gear

Turning gear and turning wheel

Axial vibration damper

2025-07-30-en ME-GA engine description General Engines built by licensees of Everllence are in accordance with our drawings and standards. In certain cases, local standards may be applied but all spare parts are interchangeable with parts designed by Everllence. Some components may differ from the design of Everllence because of local production facilities, or the application of local standard components. Bedplate and main bearing The bedplate consists of high welded longitudinal girders and welded cross girders with cast steel bearing supports. Long elastic holding-down bolts and hydraulic tightening tools are used to fit the bedplate to the engine seating in the ship. The bedplate is made with the thrust bearing in the aft end. For engines mounted on epoxy chocks, the bedplate is made without taper. An oil pan made of steel plate is welded to the bedplate. The oil pan, collects return oil from the forced lubricating and cooling oil system. Oil outlets from the oil pan are vertical as standard and provided with gratings. The main bearings consist of thin-walled steel shells lined with white metal. The main bearing bottom shell can be rotated out and in with special tools and hydraulic tools for lifting the crankshaft. A bearing cap keeps the shells in position. Frame box The frame box is welded. On the exhaust side of the frame box, a relief valve is mounted for each cylinder. On the manoeuvring side, each cylinder has a large hinged door. Crosshead guides are welded onto the frame box. The frame box is bolted to the bedplate. Stay bolts tighten together bedplate, frame box, and cylinder frame. Cylinder frame and stuffing box The cylinder frame is cast and provided with access covers for: ▪ Cleaning the scavenge air space (if required) ▪ Inspection of scavenge ports and piston rings from the manoeuvring side. The cylinder frame and cylinder liner forms the scavenge air space. The cylinder frame is fitted with pipes for the piston cooling oil inlet. The scavenge air receiver, turbocharger, air cooler box, and gallery brackets are placed on the cylinder frame. The bottom of the cylinder frame contains the piston rod stuffing box with sealing rings for scavenge air, and oil scraper rings preventing crankcase oil from entering the scavenge air space. Scavenge air space and piston rod stuffing box drains are located in the bottom of the cylinder frame. 1.06 ME-GA engine description 1.06 ME-GA engine description Cylinder liner A cylinder liner made of alloyed cast iron is suspended in the cylinder frame with a low-situated flange. The top of the cylinder liner is fitted with a cooling jacket. The cylinder liner has scavenge ports, drilled holes for cylinder lubrication and gas admission. On engines with bore sizes 95-80, the basic design includes cylinder liners prepared for installation of temperature sensors. On all other engines, this liner type is available as an option. Cylinder cover The cylinder cover of forged steel is made in one piece with bores for cooling water. It has a central bore for the exhaust valve, bores for fuel valves, pilot valves, starting valve, and indicator valve. The bore for the indicator valve is also used for PMI Auto-tuning. Crankshaft The crankshaft is of the semi-built type made from forged or cast steel throws. Depending on the number of cylinders, the crankshaft may be supplied in two parts. At the aft end, the crankshaft is provided with: ▪ Collar for thrust bearing ▪ Flange for gearwheel for step-up gear for the hydraulic power supply unit (if fitted on the engine) ▪ Flange for turning wheel, and coupling bolts to the intermediate shaft. At the front end, the crankshaft has a collar for an axial vibration damper anda flange for fitting a tuning wheel. The flange can also be used for a potential power take off installation. Normally, coupling bolts and nuts for joining the crankshaft with the intermediate shaft are not supplied.

FAQs

How is the bedplate constructed and attached to the ship’s seating?

The bedplate consists of high-welded longitudinal girders and welded cross girders with cast steel bearing supports, fitted using long elastic holding-down bolts and hydraulic tightening tools.

What components are included in the cylinder frame and stuffing box area?

The cylinder frame is cast with access covers for cleaning and inspection, includes piping for piston cooling oil inlet, and contains the piston rod stuffing box with sealing rings for scavenge air and oil scraper rings.

How does the thrust bearing transfer propeller thrust and how is it specified by cylinder count?

Propeller thrust is transferred through the thrust collar, segments, and bedplate to end chocks and engine seating and then to the ship’s hull; a B&W-Michell thrust bearing is used, with a 360-degree type for nine cylinders or more and a 240-degree type otherwise.

Oct 29, 2026

Upload by Taylor Morgan