STATIONARY BLADING FOR STEAM TURBINE, MULTISTAGE STEAM TURBINE AND METHOD FOR MANUFACTURING BLADE UNIT

摘要

FIELD: machine engineering.;SUBSTANCE: stationary blading designed for the last stage of the steam turbine and containing guiding blade units which delimit the annular chamber and each of which contains an elongated blade portion. The mentioned elongated blade portion additionally has a longitudinal channel and an inner portion soldered to the first longitudinal end of the mentioned blade portion and having a through hole forming part of the annular chamber and an inner channel extending from the through hole to the longitudinal channel. The outer part which interacts with the mentioned steam turbine is soldered to the second longitudinal end of the mentioned blade portion. The outer part comprises an outer channel open to the surface of the mentioned steam turbine and to the mentioned longitudinal channel.;EFFECT: simplicity in maintenance or replacement, reliable operation in the presence of wet steam, the design is simple and easier to manufacture.;11 cl, 11 dwg