MAN B&W S65ME-C8.2-GI-TII, Project Manual

Page: 172 / 395

MAN B&W 7.00
Page 6 of 6
MAN Diesel MAN B&W ME-GI engines 198 87 56-3.2
Sealing oil system
The consumption of sealing oil is small, as calcu-
lated in CEAS, see Section 20.02. The sealing oil
will be injected with the fuel gas into the combus-
tion chamber.
The sealing oil system is shown in Fig.7.00.05.
Sealing pump motors
Three different electric motors can be used on the
sealing oil pumps:
• Pump displacement mechanically limited to
9 ccm/rev.:
•
7.4 kW, 1,450 rpm M3AA 132 M, 50 Hz
•
8.6 kW, 1,750 rpm M3AA 132 M, 60 Hz
• Pump displacement 16 ccm/rev.:
•
18.0 kW, 1,750 rpm M3AA 160 M, 60 Hz
Gas valve Gas valve Window valve Gas valve Gas valve Window valve Gas valve Gas valve Window valve Gas valve Gas valve Window valve
Sealing oil drain tank - atmospheric pressure
Cyl. no. Cyl. no.
Cyl. no.
Cyl. no.
"Bo"
M
L
LPS
Sealing oil drain tank - atmospheric pressure
P
To next cylinder
Ps Ps Ps Ps
P
I
P
I
M
L
L P
P A
A Bda
Bv
P T
S
L
P PM
PR
T
A
B
P
Fig. 7.00.05: Sealing oil system control diagram
306 11 73-8.7.0
The sealing oil system is a pressurised hydraulic
oil system, with a constant differential pressure
kept at a higher level than the gas pressure, pre-
vents gas from entering the hydraulic oil system.
The sealing oil is applied to the gas injection valves
and the window/shutdown valve in the space be-
tween the gas on one side and the hydraulic oil on
the other side. The sealing oil pump unit is con-
nected to the gas block with double-walled pipes.
The sealing oil system consists of one pump and
a safety block with an accumulator. The sealing
oil system uses the low pressure oil supply and
pressurises it to the operating pressure 20 – 25
bar higher than the gas pressure in order to pre-
vent that the hydraulic oil is polluted with gas. The
sealing oil system is installed on the engine.