HIGH/LOW PRESSURE TURBINE ROTOR OR HIGH/MIDDLE/LOW PRESSURE TURBINE ROTOR, MANUFACTURING METHOD FOR THE SAME, AND INTEGRAL-TYPE STEAM TURBINE

摘要

PROBLEM TO BE SOLVED: To obtain a high/low- or a high/middle/low pressure integral-type turbine rotor, which can withstand a high temperature of steam at a high- pressure side and an elongated terminal stage blade at a low-pressure side meeting demands for capacity increase of a steam turbine and high efficiency thereof, and obtain an integral-type steam turbine mounted with such a turbine rotor. ;SOLUTION: A high/low- or a high/middle/low pressure turbine rotor 1 has a high-temperature side 2 composed of a rotor barrel portion B and a bearing portion A, and a low-temperature side 3 composed of rotor barrel portions C, D and a bearing portion E. At least two rotor component materials comprising different chemical compositions are employed for the high-temperature side 2 and the low-temperature side 3 of the turbine rotor 1, and integrally connected by means of electroslag remelting, welding, bolt clamping or combinations of two or more kinds of these.;COPYRIGHT: (C)2001,JPO