COMBINED UNIT OF HEAT EXCHANGER AND FLUID MEDIUM FILTER Russian patent published in 2004 - IPC

FIELD: gas-turbine engines for simultaneous filtration of lubricating oil and fuel at transfer of thermal energy between oil and fuel. SUBSTANCE: proposed combined unit includes housing with external envelope where tight heat-exchange wall is located; this wall divides housing into concentric filtration chambers for first and second fluid media. Each chamber is provided with filter material. Housing has inlets for first and second fluid media; outlets are communicated respectively with filtration chambers for first and second media. Inlets and outlets are made in single collector of housing. External envelope and heat-exchange wall are cup-shaped in form and are detachably mounted on collector by their open ends. Filter material is so located that flow of fluid medium is perpendicular relative to heat-exchange wall which is provided with longitudinal fins on its inner and outer surfaces. Width of each longitudinal heat-transfer fin on inner surface exceeds that of fins on outer surface. EFFECT: simplified construction of engine due to reduced number of components; low cost of manufacture, assembly and maintenance. 6 cl, 3 dwg