Patent Number: 6,332,754

Title: Steam turbine

Abstract: A steam turbine comprises, in combination, at least two of a high pressure turbine section, an intermediate pressure turbine section and a low pressure turbine section in a single turbine casing and the steam turbine generally satisfies such design requirements as: a main steam pressure of 100 kg/cm.sup.2 or more; a main steam temperature of 500.degree. C. or more; a rated output (power) of 100 MW or more; and a unit rotated at a rotation speed of 3,000 rpm equipped with a last-stage movable blade of the turbine having an effective blade length of 36 inches or more, or a unit rotated at a rotation speed of 3,600 rpm equipped with a last-stage movable blade of the turbine having an effective blade length of 33.5 inches or more. In such steam turbine, a turbine exhaust chamber of the low pressure turbine section has a structure extending towards both sides of a transverse direction of the turbine casing, towards the upper side thereof or in the axial direction thereof.

Inventors: Matsuda; Minoru (Yokohama, JP), Kikuchi; Masataka (Chigasaki, JP), Okita; Nobuo (Ushiku, JP), Kitaguchi; Kouichi (Yokohama, JP)

Assignee: Kabushiki Kaisha Toshiba

International Classification: F01D 1/00 (20060101); F01D 1/04 (20060101); F01D 3/00 (20060101); F01D 3/02 (20060101); F01D 25/24 (20060101); F01D 001/02 ()

Expiration Date: 12/25/2018