Noise-reducing trapezoidal frame structure of diesel engine

The utility model belongs to the field of diesel engines and particularly relates to a noise-reducing trapezoidal frame structure of a diesel engine. The noise-reducing trapezoidal frame structure of the diesel engine comprises a frame body, the frame body is integrally connected with an arched center plate, four groups of reinforcing ribs are arranged on the surface of the outer side of the center plate in pairs, the positions of the center plate corresponding to the two groups of adjacent reinforcing ribs are respectively provided with an oval oil drainage hole, two ends of the center plate are respectively provided with a round oil drainage hole, a plurality of bolt holes are evenly distributed around the circumference of the surface of the frame body, the center plate is further provided with an engine oil inlet hole, a first flange mounting threaded hole is formed over the engine oil inlet hole, and a second flange mounting threaded hole is formed at the position below the left of the engine oil inlet ho