Title:
METHOD OF REDUCING THERMAL STRESS OF TURBINE ROTOR AT TRANSIENT TIME
Document Type and Number:
Japanese Patent JPS5797001
Kind Code:
A
Abstract:
PURPOSE:To reduce the transient thermal stress of a turbine rotor by causing a portion of exhaust gas from the outlet port of a diffuser to flow into a recess provided in the axial center of the discharge section of the turbine rotor. CONSTITUTION:A recess 4 is provided in the axial part of the discharge section of a turbine rotor 2. Some of the exhaust gas from the outlet port of a diffuser 9 is introduced into the recess 4 of the turbine rotor 2 through a duct 10 so that compressive stress is simultaneously caused in the inner and outer parts of the turbine rotor 2 and tensile stress is caused between them. For that reason, the tensile stress is very low. According to this constitution, the thermal stress generated transiently in the inner periphery part of the turbine rotor 2 just after the start of a gas turbine is reduced.
Inventors:
NAGATA YUUSEI
SAKAMOTO YUUJIROU
KURASU MAMORU
YAMAMOTO SUSUMU
FUJIWARA AKIFUMI
SAKAMOTO YUUJIROU
KURASU MAMORU
YAMAMOTO SUSUMU
FUJIWARA AKIFUMI
Application Number:
JP17177880A
Publication Date:
June 16, 1982
Filing Date:
December 04, 1980
Export Citation:
Assignee:
KOBE STEEL LTD
International Classes:
F01D5/08; F02C7/00; (IPC1-7): F01D5/08; F02C7/00
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