Me-B Mark 9 Engine Description; Bedplate And Main Bearing; Frame Box; Cylinder Frame And Stuffing Box - Man B&W S50ME-B9.3-TII Project Manual

MAN B&W

ME-B Mark 9 Engine Description

Please note that engines built by our licensees are
in accordance with MAN Diesel & Turbo drawings
and standards but, in certain cases, some lo-
cal standards may be applied; however, all spare
parts are interchangeable with MAN Diesel &
Turbo designed parts.
Some components may differ from MAN Diesel &
Turbo's design because of local production facilities
or the application of local standard components.
In the following, reference is made to the item
numbers specified in the 'Extent of Delivery' (EoD)
forms, both for the 'Basic' delivery extent and for
some 'Options'.

Bedplate and Main Bearing

The bedplate is made with the thrust bearing in
the aft end of the engine. The bedplate is of the
welded design and the normally cast part for the
main bearing girders is made from either rolled
steel plates or cast steel.
For fitting to the engine seating in the ship, long,
elastic holdingdown bolts and hydraulic tighten-
ing tools are used.
The bedplate is made without taper for engines
mounted on epoxy chocks.
The oil pan, which is made of steel plate and is
welded to the bedplate, collects the return oil from
the forced lubricating and cooling oil system. The
oil outlets from the oil pan are normally vertical
and are provided with gratings.
Horizontal outlets at both ends can be arranged
for some cylinder numbers, however this must be
confirmed by the engine builder.
The main bearings consist of thin walled steel
shells lined with bearing metal. The main bearing
bottom shell can be rotated out and in by means
of special tools in combination with hydraulic tools
for lifting the crankshaft. The shells are kept in po-
sition by a bearing cap.
MAN B&W ME-B9.5/.3 engines

Frame Box

The frame box is of welded design. On the ex-
haust side, it is provided with relief valves for each
cylinder while, on the manoeuvring side, it is pro-
vided with a large hinged door for each cylinder.
The framebox is of the well-proven triangular
guide-plane design with twin staybolts giving ex-
cellent support for the guide shoe forces.

Cylinder Frame and Stuffing Box

For the cylinder frame, two possibilities are avail-
able.
• Nodular cast iron
• Welded design with integrated scavenge air re-
ceiver.
The cylinder frame is provided with access covers
for cleaning the scavenge air space, if required,
and for inspection of scavenge ports and piston
rings from the manoeuvring side. Together with
the cylinder liner it forms the scavenge air space.
The cylinder frame is fitted with pipes for the pis-
ton cooling oil inlet. The scavenge air receiver, tur-
bocharger, air cooler box and gallery brackets are
located on the cylinder frame. At the bottom of the
cylinder frame there is a piston rod stuffing box,
provided with sealing rings for scavenge air, and
with oil scraper rings which prevent crankcase oil
from coming up into the scavenge air space.
Drains from the scavenge air space and the piston
rod stuffing box are located at the bottom of the
cylinder frame.
MAN Diesel
1.06
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