Installation of sliding bearings and inspection of bearing shells

Pay attention to the unobstructed oil circuit and connect it to the oil tank. When scraping and grinding, the dots on both sides of the oil groove should be soft to form an oil film, and the dots on both ends should be evenly distributed to prevent oil leakage. In the later maintenance, it should be easy to add lubricating oil. Beneficial for maintenance.

Pay attention to cleanliness, and any parts that may have oil stains during the repair and debugging process should be cleaned and coated with oil after repair. Before installing the bearings, they must be cleaned to ensure that the sliding bearings are clean. Even tiny impurities can cause damage to the bearings. The installation of sliding bearings should ensure that the journal rotates flexibly, accurately, and smoothly in the bearing hole. Due to the hassle of maintaining sliding bearings, it is important to ensure that the bearings are installed completely correctly and without errors during installation. Ensure that the bearings can operate normally without errors.

The bearing shell and bearing seat hole should be repaired and scraped tightly, and the split surface of the bearing shell should be raised by 0.05-0.1mm to facilitate compression. When pressing in the integral bearing shell, it should be prevented from tilting and fixed with fastening screws. If the bearings are skewed during installation, it can cause poor operation, deformation of the shaft, and damage to mechanical equipment.

During the use of sliding bearings, it is necessary to regularly check for lubrication, heating, and vibration issues. In case of heating, smoking, jamming, abnormal vibration, noise, etc., timely inspection should be carried out. If a series of faults occur, analysis should be conducted, and corresponding measures should be taken based on the specific situation analyzed. Try to avoid unnecessary damage as much as possible.

Bearing inspection, radial bearing inspection items: The bearing alloy has no defects such as tire detachment, cracks, sand holes, pores, etc., the contact area between the shaft diameter and the bearing shell, the adjustment of the fit between the pad iron and the bearing seat, whether the bearing shell joint surface is flat, and whether there are any burrs or deformations. Measurement items for radial bearing disassembly: bearing tightening force, top clearance, side clearance, and symmetry of side clearance, contact between lower bearing and shaft diameter, wear degree of bearing black gold, roundness and surface roughness of shaft diameter, cleanliness of oil system and oil quality test results, and other inspection items.

Inspection and treatment of bearing shell delamination: The inspection method for bearing shell delamination is to soak the bearing shell in kerosene, leave it for a moment, take it out and dry it, put clean paper on the joint or apply white powder to the joint, and then squeeze the bearing shell delamination by hand. If there are oil stains on the paper or white powder, it indicates that the bearing shell delamination. If one of the following defects is found after the bearing shell inspection, it must be recast: the gap between the bearing shells is too large, the alloy thickness cannot be further scraped, the black gold has large areas of sand holes, pores, impurities, delamination cracks, etc.