Cleaning The Turbine During Operation - ABB A130-M65 Operation Manual

Operation Manual / 4 Product description / A130-M.. - A145-M..
6 Periodic maintenance work
6.3

Cleaning the turbine during operation

6.3.1 Introduction
Approval by enginebuilder
These instructions for wet cleaning only apply to cleaning with pure water and under the
precondition that the enginebuilder approves the process.
Options and limits
Periodic cleaning in operation reduces a major increase in contamination and can extend the
intervals between service work. The cleaning method is particularly suitable as long as the
contamination is not too advanced. Very heavily contaminated components can no longer be
cleaned using this method. In this case, ABB Turbo Systems recommends having the
contaminated components cleaned mechanically by an ABB Turbocharging Service Station.
Periodic cleaning in operation is no replacement for service work in which an ABB
Turbocharging Service Station completely dismantles and maintains the turbocharger.
Cause and consequences of contamination
ABB Turbo Systems recommends the use of fuels with low ash, sulphur, sodium and
vanadium contents.
The combustion of heavy fuel oil (HFO) in diesel engines causes contamination of the turbine
stage. Poor quality fuel in conjunction with high exhaust gas temperatures can lead to
extremely hard deposits on turbine components.
Consequences of contamination:
 Low turbine efficiency
 Elevated exhaust gas temperatures
 Increased charging and ignition pressures with increasing turbocharger speed
 Lower engine performance.
 After the engine is stopped the rotor may become stuck in contamination deposits.
6.3.2 Cleaning interval
The time period between the periodical cleaning cycles depends greatly on the operating
conditions. Cleaning should normally be done every 50 to 200 hours of operation.
If the specified cleaning intervals are incompatible with operation of the engine, contact ABB
Turbo Systems.
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Revision C February 2016