In fact, the early damage of the sliding bearing of the automatic feeding mixer is more common than the bearing burning, so it is very important to prevent the early damage of the sliding bearing.
Under the repeated action of the cylinder pressure impact load, the surface of the sliding bearing undergoes plastic deformation and cold work hardening, partially losing the deformation ability, gradually forming stripes and expanding, and then with the falling off of the wear debris, a cavity is formed on the stressed surface.
In general, when pitting occurs on the bearing bush, the pitting first occurs, and then gradually expands, leading to the interface cracking of the alloy layer. The crack propagates parallel to the interface until peeling.
The main reason for cavitation of sliding bearing is that the sudden change of the cross section of structural elements such as oil groove and oil hole leads to the strong disorder of oil flow, forming bubbles in the disordered vacuum area, and then cavitation occurs due to the collapse of bubbles due to the pressure rise. Manufacturer of automatic feeding mixer
Cavitation usually occurs in high load areas of bearings, such as lower bearing shells of crankshaft main bearings. The bearing cup is the relative rotation of the bearing in the seating hole. After the bearing passes through the outer ring, it will not only affect the heat dissipation of the bearing, easily cause alloy corrosion on the inner surface of the bearing, but also damage the back of the bearing, and even burn the bearing in serious cases. The main reasons are that the bearing is too short, the tenon is damaged, and the processing or installation does not conform to the specifications.
The correct maintenance of sliding bearing is a way to reduce the early damage of bearing, and also a reliable guarantee to extend the service life of bearing. Therefore, in the daily maintenance and repair of the engine of the automatic feeding mixer, attention must be paid to the appearance of the alloy surface, the back of the bearing, the end and the corner.
If there are abnormal signs or wear is more than half, be sure to carefully find out the cause, take corresponding measures, the working conditions of the bearing, and pay attention to prevent the early damage of the sliding bearing.