Stage replacement blade ring flow guide

Details Stage replacement blade ring flow guide Stage replacement blade ring flow guide

1990-10-01

1991-10-15

Kwon, John T.

Rotary kinetic fluid motors or pumps

Working fluid passage or distributing means associated with...

Plural distributing means immediately upstream of runner

4152081, 415220, 415914, 2988921, 2988923, F01D 104

Patent

active

050569899

ABSTRACT:
Power output of a steam turbine is increased by removal of at least one stage of blading in order to increase mass flow through the turbine. A flow guide or annular ring is installed in the space in the inner cylinder or blade ring surrounding the area from which the blading stage has been removed. The flow guide has a radially inner surface conforming generally to the surface configuration of the inner cylinder surrounding the turbine blades. The flow guide presents a relatively smooth, continuous surface to inlet steam flow so that flow separation and turbulence are reduced with a corresponding increase in efficiency.

REFERENCES:
patent: 1949474 (1934-03-01), Jacobsen
patent: 3690786 (1972-09-01), Silvestri, Jr.
patent: 4900223 (1990-02-01), Groenendaal, Jr.

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