| 摘要 |
<p>1,093,188. Separating fuel and water. BENDIX CORPORATION. Dec. 21, 1964 [Jan. 13, 1964], No. 51921/64. Heading B1D. A mixture of fuel and water enters housing 38 at 32 and the fuel flows outwards through pervious hydrophobic concentric screens 50 to 64 which progressively hold back the water in steps as shown, and the fuel and water leave by respective outlets comprising selfstarting siphons which start at levels F 1 , W 1 and stop at levels F 2 , W 2 . The water siphon comprises concentric tubes 72, 74, the fuel siphon comprises an annular space 88 in the housing wall and three circumferentially spaced outlet tubes 94. The screens may be wire coated with P.T.F.E., whose aperture sizes (given) may decrease stepwise outwardly, either by varying the screen mesh size, the coating thickness or the wire diameter, and all or alternate screens may be pleated (Fig. 4, not shown). The alternate pleated screens may be non-hydrophobic and merely reduce splashing Alternatively the outer screens could comprise helically wound P.T.F.E. ribbon type elements. Specification 1,045,347. In use, the device is connected to a coalescer unit (14) (Fig. 1, not shown), which receives fuel pumped from a tank (10) and delivers a purified fuel fraction to an I.C. engine, e.g. in a military tank. A restriction (36) determines the fraction of retained water and fuel, sufficient to deal with the maximum expected water content, which is drawn from coalescer (14), upstream of the outlet filter element therein. The fuel discharge from the housing 38 returns to fuel tank (10). Air is vented from 46 to the fuel tank which has a normal vent. The coalescer 14 may comprise an inward flow assembly of concentric resin-impregnated fibre element, cloth, fibre glass or nylon batt, pleated paper element, the last of which might be replaced by a washer type edge filter or sintered metal element. The opening to the fuel-water discharge sump is from outside the latter element, Specification 825,192.</p> |
