What are the reasons for the damage to key components such as the shaft bearings of circulation machines? How should it be handled?

The reasons for tile burning are as follows: (1) Insufficient oil level in the oil pan (or crankcase), or blocked oil passages, resulting in poor lubrication. 　　(2) Oil pressure is too low. The normal oil pressure should generally be between 1.5 and 3 kg/cm2. If the oil pressure drops below 0.8 kg/cm2, the machine should be stopped immediately for inspection; otherwise, bearing burnout can occur. 　　(3) The mating contact surface between the bearing shell and the shaft journal does not meet the required standards. Generally, the contact area should be no less than 75%, with the contact points distributed evenly ； The clearance between the bearing shell and the shaft journal is either too large or too small, preventing the oil from forming a proper lubricating film during lubrication, which results in poor lubrication. 　　(4) If the ellipticity of the journal exceeds certain limits, it again prevents the formation of a proper oil film during lubrication, resulting in poor lubrication. 　　(5) Wear on the back of the large end of the connecting rod prevents the bearing shell from fitting tightly against the large end of the connecting rod, which leads to wear of the connecting rod bearings. 　　(6) The quality of the bearing bush alloy is not up to standard; the alloy does not fit tightly against the backing bush. 　　(7) The centers of the main bearing shells are not aligned, which causes the crankshaft to have a thick or thin oil film in certain areas while rotating within the bearing shells; friction can occur, and in severe cases the bearings may be damaged.