How to retrofit a multi-stage partially approaching arc steam turbine

摘要

Provided is a method of retrofiting a multi-stage partial arc of admission steam turbine (10) and a steam turbine (10) obtainable by the method. The method comprises forming at least one inlet belt (30) in the inner housing (12) downstream of at least one the first blade rows (18) of the steam turbine (10) and forming a duct (32), connecting the first inlet line (24) and the or each inlet belt (30). The duct (32) and the inlet belt (30) are adapted to enable a steam to pass through the first inlet line (24) and bypass the first blade row (18) of the steam turbine (10) and the connection of the duct (32) to the first inlet line (24) is such that all steam flowing through the first inlet line (24) passes through the duct (32).