Exhaust system
26
Flexible exhaust compensator
Exhaust pipes are isolated from the engine move-
ments usually via a flexible compensator.
The compensator should be fitted to the exhaust
elbow. In special cases the compensator can be in-
stalled up to max. m (3.3 ft) from the exhaust outlet.
Flexible exhaust compensators have three functions:
•
Isolate vibrations and weight of exhaust piping
from the engine
•
Compensate for thermal expansion of the exhaust
piping
•
Compensate for lateral movement when the en-
gine starts and stops, if the engine is on flexible
engine mounts.
The flexible pipe is available to take up large axial
movements, small radial movements but no twisting
movements.
It must not be bent. The flexible compensator can be
fitted in different positions, but should preferably be
fitted vertically.
The fixture for the exhaust line should be designed
to prevent that radial movements, generated by pres-
sure pulses in the line are transfered into the com-
pensator.
Thermal growth of exhaust piping must be planned
to avoid excessive load on supporting structures. The
expansion of one meter of steel pipe per rise in tem-
perature of 00°C (22 °F) is approx. .2 mm (0.05").
It is therefore important to place supports to allow
expansion away from engine, avoid strains or distor-
tions to connected equipment, and to allow equip-
ment removal without additional support.
Long pipe runs are sectioned with expansion joints.
Each section is fixed at one end and allowed to ex-
pand at the other.
Содержание D11 series
Страница 1: ...Marine Propulsion Diesel Engines Installation 1 1 D E D5 D16 series ...
Страница 2: ......
Страница 208: ...206 References to Service Bulletins Group No Date Concerns ...
Страница 209: ...207 Notes ...
Страница 210: ...208 Notes ...
Страница 212: ...7748655 English 11 2007 ...