Retrofitted steam turbine and steam turbine retrofit method

摘要

The presented technical solution concerns the retrofitted, i.e. upgraded low-pressure part of the steam turbine and the method of modernization - retrofit - of the low-pressure part of the steam turbine. The low-pressure part of the steam turbine according to the present invention comprises the original outer body and the original inner body (10) of the turbine and the rotor, the rotor being a new rotor which is installed in the original inner body (10) with the first radius R1, said rotor being dimensioned for the inner body (100) different from the original inner body (10) and characterized by a second radius R2, the second radius R2 being greater than the first radius R1, R2 R1. The retrofitted low pressure part of the steam turbine further comprises a coupling element for connecting the surface of the outer part of the diffuser to the inner body, the connecting element being arranged between the inner body and the outer surface of the outlet diffuser such that the outer part of the diffuser connected to the surface to the connecting element is to its original position prior to the turbine was retrofit radially offset from the longitudinal axis of the turbine, at a distance that is equal to or greater than the difference between the second radius R2 of the inner body and the first radius R1 of the original inner body.