Draft tube aeration with check valves

Details Draft tube aeration with check valves Draft tube aeration with check valves

1977-10-26

1979-03-06

Casaregola, Louis J.

Rotary kinetic fluid motors or pumps

With diversely oriented inlet or additional inlet for...

60696, 415119, F01D 2530

Patent

active

041428269

ABSTRACT:
A hydraulic turbo-machine such as a Francis turbine has a draft tube with air admission provision, to stabilize flow. A plurality of air boxes are provided having a long upstream surface and a short downstream surface to provide an inductive effect with the flow of water downwardly thereover. A non-return valve at the box downstream face substantially precludes the ingress of water within the box during conditions of disturbed flow, so that the breathing capability of the box is optimized.

REFERENCES:
patent: 1606887 (1926-11-01), Moody
patent: 2262191 (1941-11-01), Moody
patent: 2300748 (1942-11-01), Rheingans

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