Fluid reaction surfaces (i.e. – impellers) – Rotor having flow confining or deflecting web – shroud or... – Axially extending shroud ring or casing
Patent
1997-01-30
1998-11-03
Kwon, John T.
Fluid reaction surfaces (i.e., impellers)
Rotor having flow confining or deflecting web, shroud or...
Axially extending shroud ring or casing
F04D 2938
Patent
active
058299556
ABSTRACT:
A steam turbine is provided with moving blades which are affected less by erosion and fretting wear due to water and have a high reliability in strength. The moving blades are twisted moving blades, each provided with a blade portion and a shroud portion formed at its tip and a contact surface between shroud portions connecting adjacent moving blades whereby an extension plane of the contact surface toward the blade back side does not intersect with the blade tip of the blade back side shroud portion.
REFERENCES:
patent: 4155152 (1979-05-01), Cretella et al.
patent: 4798519 (1989-01-01), Zipps et al.
patent: 4840539 (1989-06-01), Bourcier et al
patent: 5261785 (1993-11-01), Williams
patent: 5460486 (1995-10-01), Evans et al.
Ikeuchi Kazuo
Katayose Masumi
Namura Kiyoshi
Saito Eiji
Takasumi Masakazu
Hitachi , Ltd.
Kwon John T.
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