Particular Problems Of Steam Turbine Lubrication
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The reliability of a steam turboset is dependent, among other things, on correct functioning of its hydraulic lubrication and control system. An essential requirement is a reliable oil supply over the whole operating range. The main oil pump carries to a large degree this responsibility. The design and operational aspects of it will be dealt with in this paper. Air dispersed in oil is known to endanger, in extreme cases, the safe and reliable operation of the turbogroup. Besides operating interferences of various system components an interruption of oil supply to the bearings may result in serious consequences. Without going into details of oil qualities, operational consequences as well as corrective measures, of air present in oil will be discussed. The increasing specific demands imposed upon steam turbines may bring about new oil system difficulties. The subject matter presented here treats extreme cases of thermal loading of the lube oil as in the case when coming into contact with hot turbine parts. The resulting coke deposits in bearings may cause failure. With the assistance of experimental comparison tests lube oils on this basis are selected that will have the inherent capabilities to withstand such extreme operating conditions.
Enz, Walter E.; Hausemann, Alfred (1978). Particular Problems Of Steam Turbine Lubrication. Texas A&M University. Gas Turbine Laboratories. Available electronically from