Selfwashable device for separating and filtering solid particles in a liquid flow and use in a fuel injection system provided with such a device

摘要

The vortex created by using a tangential inlet for the liquid separates some of the solid particles from the liquid by centrifugal effects before the filter in the center of the vortex is used to remove the rest The device comprises a tubular drum (10) with a peripheral wall, a top wall and a bottom wall, an internal chamber (11) in the drum, a tangential inlet (12) for the liquid opening into the chamber near the top wall of the drum, creating a vortex in the internal chamber to separate the solid particles by centrifugal effect and propel them to the edge of the drum, a tangential outlet (13) for the liquid near the bottom wall of the drum to remove the solid particles, a tubular filter sleeve (14) mounted longitudinally in the internal chamber between the top and bottom walls of the drum to remove and filter part of the liquid, placed in the center of the vortex. This filter has a longitudinal central pipe (15) opening into at least one longitudinal outlet (16) for the filtered liquid. At the levels of the inlet and outlet, the inside of the drum has a spiral internal surface to form inlet and outlet funnels. The device contains two filter zones separated by a sealed divider. The zones have different filter meshes.