Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Specific casing or vane material
Patent
1996-08-22
1999-10-05
Ryznic, John E.
Rotary kinetic fluid motors or pumps
Working fluid passage or distributing means associated with...
Specific casing or vane material
4152161, 416241R, 60 3975, 420 69, 420106, 420 64, F01D 102, B63H 126, C22C 3818
Patent
active
059612843
ABSTRACT:
A steam turbine has main components such as rotor shaft exposed to high temperature and intermediate pressure, which are made of a ferritic steel and the main steam temperature and the re-heat steam temperature are 610.degree. C. to 660.degree. C., and a steam turbine power plant employs the turbine. Further, the rotating blades are made of only a martensitic steel or a combination of the martensitic steel and a Ni base alloy, the turbine rotor is made of a ferritic forged steel having a creep rupture strength at the operating temperature for 100 thousands hours of above 15 kg/mm.sup.2, and the casing is made of a ferritic cast steel having a creep rupture strength at the operating temperature for 100 thousands hours of above 10 kg/mm.sup.2.
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Patent Abstracts of Japan vol. 95, No. 005, & JP-A-07 118812 (Hitach, Ltd) May 9, 1995 Tables 1-4, col. 8, abstract.
Database WPI, Sec. Ch, Week 9507, Derwent Publs. AN 95-049294 & JP-A-06 330 245 (Nippon Steel) Nov. 1994, Composition Table.
Fukui Yutaka
Hidaka Kishio
Hiraga Ryo
Kawakami Masao
Kuriyama Mitsuo
Hitachi , Ltd.
Ryznic John E.
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