Closed filter grille for lubricant outlet of oil sump of diesel engine

The invention discloses a closed filter grille for a lubricant outlet of an oil sump of a diesel engine. The closed filter grille comprises a grille body and a cover plate, wherein the grille body comprises a flat mesh plate, an annular mesh plate and a connecting flange; the flat mesh plate is fixed on the upper side of the annular mesh plate; the flat mesh plate and the annular mesh plate form aclosed grille; the connecting flange is fixed on the lower side of the annular mesh plate; the cover plate is supported by a flange at the lubricant outlet of the oil sump; the grille body is supported by the upper side of the cover plate; and the connecting flange of the grille body, the cover plate, and the flange at the lubricant outlet of the oil sump are fixedly connected. The closed filtergrille is simple and compact in structure and low in cost, can realize omnibearing filtering of lubricant at the lubricant outlet of the oil sump of an engine base, increases the filtering range of the lubricant at the lubrica