Shutting Off Inlets And Outlets - ABB HT842305 Operation Manual

Operation Manual / TPL85-B14/-B15/-B16
9 Short-term turbocharger shut-down / 9.3 Shutting off inlets and
outlets
9.2.3 Further information for operation with locked rotor
2-stroke engine with one
turbocharger:
2-stroke engine with sev-
eral turbochargers:

9.3 Shutting off inlets and outlets

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on 2-stroke engines
No further measures are necessary. The engine can be operated with the
auxiliary blower according to the manufacturer's instructions.
The lubricating system must remain connected and turned on.
The bellows at the compressor end must be removed and the air line
u
at the engine end closed off because the undamaged turbochargers
develop a receiver pressure.
The operating limit of the engine can be raised by additionally closing
u
off the gas inlet because the exhaust gas is then used to drive the un-
damaged turbochargers. In addition, the load on and the temperature
of the blocked rotor are reduced.
If the gas inlet cannot be closed off, the following operating limits must
be observed:
¡
The pressure in the charge-air receiver must not exceed 1 bar over
pressure.
¡
Maximum permissible engine load: 50%.
CAUTION
Attention must be paid to the speed of the undamaged turbochargers
in any event. The speed limit n
plate must not be exceeded.
CAUTION
Shut off the lubricating oil supply to the turbocharger.
This applies only to engines with several turbochargers and common
w
air as well as exhaust gas receivers.
Shut off compressor casing outlet, gas inlet and gas outlet by fitting
u
cover plates.
NOTICE
In this respect, refer to the engine manufacturer's instructions.
HZTL2491_EN
given on the turbocharger rating
Bmax
Revision C August 2018