The methods to increase of the passing capacity for the low-pressure cylinder of condensing turbines
Examined are the methods of increasing of the passing capacity for the low-pressure cylinder of powerful condensing turbines. Described are typical problems for the specified decisions. Enormous practical interest is represented by a problem of sharp increasing of the passing capacity for the low-pressure cylinder of powerful condensing turbines without increase of heights of blades of the last stages. Given is a construction of the new substantially two-level stage on the basis of which a new low-pressure cylinder has been designed; its passing capacity is enlarged by 70% and high efficiency is kept. New type of the two-level stage consists of two independent blade devices, which differing of number of blades and steps between blades. With this solution blade`s fanning of the top level are reduced. The middle relative diameter is increased at top and lower levels, level of blade swirl is decreased.