The invention relates to an
oil bath air filter, which comprises an air inlet
pipe seat, a butterfly nut, an anti-vibration sealing ring, a shell, an upper port sealing ring, a ventilated
filter element cover, an oily
filter element, a
filter element accommodating body and an oil baffle disc. In the oil path dust cross structure, dust absorption oil is stored in an
oil storage cavity, air contacts the dust absorption oil and then enters a capillary tube of the oily filter element after being sucked, dust and
solid particles in the air are subjected to secondary oil adsorption, and fine dust in the air can be adsorbed and removed; the oily filter element is a
polyurethane foam
sponge, has high filtering efficiency and long service life, and is convenient to clean; the shell and the air inlet
pipe seat are formed by pressing modified
engineering plastic which has high injection forming performance, a cavity which meets the design requirement can be conveniently formed by pressing, and air inlet resistance and anti-vibration sound absorption performance are high; and steel is replaced by the plastic, so that production efficiency is high, quality is stable, weight is light, the air inlet quality of a
diesel engine is ensured and the sufficient
combustion of diesel oil is better facilitated due to a dual seal structure, and the output power of the
diesel engine is improved.