Heat exchange – Movable heating or cooling surface – Rotary drum
Patent
1993-05-12
1994-06-14
Davis, Jr., Albert W.
Heat exchange
Movable heating or cooling surface
Rotary drum
184 611, 184 622, 1841041, 184108, 60 3908, F16N 2904
Patent
active
053201965
ABSTRACT:
A system is disclosed for detecting a malfunction in a fuel/lubricating oil heat exchanger which includes a pressure differential generator located in the pressure balancing conduit connecting the lubricating oil reservoir with the lubricating enclosure. The pressure differential generator may be a cavitation venturi tube having a throat which, under normal conditions, allows sub-sonic fluid flow which enables the air in the lubricating enclosure to freely communicate with the interior of the oil reservoir and vice versa. When fuel is mixed with the lubricating oil, due to a malfunction in the fuel/oil heat exchanger, the fuel enters the lubricating oil reservoir causing the fluid level within the reservoir to rise and overflow. The cavitation venturi tube is then supplied with a comparatively hot mixture of fuel and oil having a vapor pressure approximately equal to the reference pressure within the lubricating enclosure. Under these conditions, vaporization takes place at the throat of the venturi tube which effectively blocks any fluid flow through the venturi. As a result, the pressure within the oil reservoir increases.
REFERENCES:
patent: 4511016 (1985-04-01), Doell
Patent Abstract of Japan, vol. 8, No. 163 (P-290).
Davis Jr. Albert W.
Societe Nationale d'Etude et de Construction de Moteurs d'Aviati
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