Turbine, in particular steam turbine, and turbine blade

Details Turbine, in particular steam turbine, and turbine blade Turbine, in particular steam turbine, and turbine blade

1998-07-29

1999-12-07

Look, Edward K.

Rotary kinetic fluid motors or pumps

Bearing, seal, or liner between runner portion and static part

Between blade edge and static part

4151736, 4151737, 4151745, 415230, 416189, F01D 102

Patent

active

059972491

ABSTRACT:
A turbine, in particular a steam turbine, has a gap between a head region of a first turbine blade and a turbine component. The gap is followed downstream by a limiting surface which is inclined by an acute angle relative to a rotational axis of the turbine and is formed, at least in some regions, by the turbine component. The first turbine blade is followed by a second turbine blade which has a blade region with a radial offset relative to the blade region of the first turbine blade. The turbine component or the head region in the sealing gap additionally or alternatively has an indentation for deflecting a flow of an action fluid in the sealing gap by a circumferential angle in circumferential direction. A turbine blade includes a head region having a circumferential surface substantially perpendicular to a blade axis. The circumferential surface has at least one indentation for flow deflection substantially by a circumferential angle. A blade region adjoins said head region for deflecting an action fluid by the circumferential angle.

REFERENCES:
patent: 4466772 (1984-08-01), Okapuu et al.
patent: 4714406 (1987-12-01), Hough
patent: 5232338 (1993-08-01), Vincent de Paul et al.
patent: 5328326 (1994-07-01), Gros et al.
patent: 5547340 (1996-08-01), Dalton et al.
Japanese Patent Abstract No. 58113504 (Eijirou), dated Jul. 6, 1983.
"Loss Mechanism In Turbo Machines" (Denton), The American Society of Mechanical Engineers, 93-GT-435, pp. 1-40.

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