In fact, the early damage of the sliding bearing of the mixer is more common than the bearing burning, so it is very important to prevent the early damage of the sliding bearing. How to deal with the damage of the sliding bearing of the cement self feeding mixer?
Under the repeated action of the cylinder pressure impact load, the surface layer of the sliding bearing undergoes plastic deformation and cold work hardening, loses the deformation ability locally, gradually forms stripes and continues to expand, and then forms cavities on the loaded surface layer as the wear debris falls off.
In general, when the bearing bush is cavitated, the pit first appears, and then this pit gradually expands and causes the alloy layer interface to crack. The crack extends along the parallel direction of the interface until it is peeled off.
The main reason for cavitation of sliding bearing is that the sudden change of cross section of structural elements such as oil groove and oil hole causes a strong disorder of oil flow, forming bubbles in the vacuum area where the oil flow is disordered, and then cavitation occurs due to bubble collapse due to pressure rise.
Cavitation usually occurs in the high load area of the bearing, such as the lower bearing pad of the crankshaft main bearing. The bearing moves in the outer circle. The bearing moves in the outer circle, which means that the bearing rotates relatively in the seating hole.
After the bearing goes to the outer circle, it will not only affect the heat dissipation of the bearing, which is easy to ablate the alloy on the inner surface of the bearing, but also damage the back of the bearing, which will 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 an effective 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, attention must be paid to the appearance of the alloy surface, back, end and edge corners of the bearing.
In case of any abnormality or signs of more than half wear, it is necessary to carefully find out the causes, take corresponding measures, improve the working conditions of bearings, and pay attention to the prevention of early damage of sliding bearings. Come to our website for more information http://www.qzt12580.com Consult!