Centrifugal oil filter

The centrifuge of the D-240 engine is designed to clean the circulating oil in the lubrication system. A centrifugal filter equipped with a nozzleless hydraulic drive is installed on the engine.

The filter housing has an axis on which the rotor rotates. The lid is attached to the skeleton with a nut and sealed with a rubber ring. The rotor is kept from axial movements by a washer and nut placed at the upper end of the threaded axis. From above, the rotor is closed with a cap, fixed with a nut with a washer. An oil exhaust tube is placed in the inner cavity of the axis. Under the influence of centrifugal forces, small particles, products of wear of parts and decomposition of oil remain on the inner walls of the rotor. The purified oil is injected at high speed through the tangential hole into the inner groove of the rotor housing in the area of the inlets of the rotor axis. As a result, a reactive force is formed, which rotates the rotor. Further, the oil is fed through the holes in the rotor axis and the tube into the main oil line.

The safety valve controls the pressure of 0.65-0.70 MPa (6.5-7.0 kgf/cm²) in front of the rotor. In the event that the oil pressure at the inlet to the rotor exceeds this value, it is drained through the valve into the sump.

The pressure of the drain valve is adjusted to a value of 0.20-0.30 MPa (2-3 kgf / cm²) and maintains the required pressure in the main oil line.