ABB TPL65-A36 Operation Manual

Also see for TPL65-A36: Operation manual Operation manual Operation manual Operation manual Operation manual

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ABB TPL65-A36 Operation Manual Manual pdf 59 page image

Operation Manual / TPL65-A32 / -A33 / -A36 + TPL69-A32 / -A33Maintenance 5Cleaning turbine blades and nozzle ringin operation5.4 Page 57© Copyright 2016 ABB. All rights reserved.November 2016HZTL2498_ENRevision BCleaning turbine blades and nozzle ring inoperation5.4The combustion of heavy fuel oil in diesel engines contaminates the tur-bine blades and nozzle rings of turbochargers. The deposits on the tur-bine components originate from the following combustion products: Soot Molten ash Cinder Incompletely burned fuel Sodium vanadyl vanadateIt is advisable to use fuels with a low ash, sulphur, sodium and vanadiumcontent. The fuel must also be correctly stored, prepared and handled.We recommend using fuels with a vanadium-to-sodium mass ratio of lessthan 3:1 so that the melting temperature of the sodium vanadyl vanadateis as high as possible.The amount of contamination increases over time, which is why regularand correctly performed cleaning is important in order to remove the de-posits that have formed.Contaminated turbine components can cause a slight increase in chargingpressure because of narrowing of the turbine cross-section. The contami-nation causes a drop in turbine efficiency, and the engine temperaturesdownstream of the cylinder can increase. The engine performance musttherefore be reduced if necessary.The contamination of the turbine also causes rotor unbalance. Extremelyheavy contamination can lead to non-permissibly high unbalance of therotor.Operating experience has shown that, in spite of regular cleaning duringoperation, it is essential to carry out the overhauls during which the tur-bine and the nozzle ring are cleaned mechanically. However, if cleaning iscarried out properly and the cleaning system is properly dimensioned, theintervals between overhauls can be increased.The interval between periodic cleaning is very dependent on the operatingconditions. As a rule, cleaning should be carried out every 50 to 200 op-erating hours.5.4Wet cleaning interval