Sustainable Mining and Metallurgy

The oil film of primary and secondary tilting bearing bush of SVK12-3S centrifugal air compressor in smelting plant of a smelter was studied. After adjusting the boundary conditions, the oil film temperature, pressure and flow rate under different oil inlet temperatures were simulated by modeling and finite element simulation. The simulation results showed that: 1) There were pressure concentration areas in the oil film of the bearing bush, but the pressure distribution of the oil film of the primary bearing bush was all positive pressure, while the oil film of the secondary bearing bush has obvious positive and negative concentration areas, and the pressure difference was large, so it was predicted that the oil film of the secondary bearing bush was easy to break; 2) The change trend of oil film temperature of the primary and secondary bearing bush was basically the same, and the oil film temperature difference of the secondary bearing bush was slightly larger; 3) The oil film velocity of the primary and secondary bearing bushes was basically constant, which was 13.1m/s and 82.0m/s respectively; 4) Compared with the previous three overhauls of a plant, the damage of the secondary bearing bush was worse, which was consistent with the simulation results and verified the reliability of the model. According to relevant research experience, some suggestions were proposed to improve the bearing bush operation, such as monitoring the main parameters such as oil pressure and oil temperature, strictly following the operation rules during start-up, etc.