Bearings and oil seals are key and easily damaged components of a fertilizer roller press granulator. Proper daily maintenance can prevent malfunctions such as oil leaks, dust ingress, and bearing seizure, ensuring continuous operation of the roller press granulator production line.
Daily inspections require checking the condition of the oil seals on each bearing housing daily, observing for any oil seepage, leaks, or material spillage. If oil stains are found, it is often due to aging of the oil seal, lip wear, or misalignment; the machine must be stopped immediately for inspection and replacement. At the same time, pay attention to the bearing’s operating sound; abnormal noises, overheating, or jamming indicate insufficient lubrication or impurities entering the bearing, requiring immediate attention.
Lubrication maintenance requires periodically adding special high-temperature resistant lithium-based grease, with the amount added controlled to 1/3 to 1/2 of the bearing cavity. Too much grease will cause the bearing to overheat, while too little will accelerate wear. For new machines or the first grease application after maintenance, a sufficient amount should be added. During normal production, grease should be added every 7 days; under heavy load conditions, this should be shortened to 3-5 days. Before adding grease, clean the grease nozzle and surrounding dust to prevent impurities from entering the cavity with the grease. When disassembling and replacing oil seals, first disconnect the power and stop the machine, then mark the alignment. Avoid prying hard during disassembly to prevent scratching the journal and housing bore. Before installing a new oil seal, check that the lip is undamaged and has normal elasticity; the lip must face the bearing side and fit tightly. If the journal has burrs or rust, grind it smooth to prevent damage to the oil seal. Ensure coaxiality during assembly, and tighten bolts diagonally and evenly to prevent misalignment of the bearing housing, which could cause one-sided wear of the oil seal.
Before long-term shutdown, replenish the grease and clean any powder or wet material adhering to the outside of the oil seal to prevent hardening and corrosion of the seal. During production, strictly prevent dust and damp materials from entering the bearing housing. Replace any failed oil seals promptly to protect the bearings from the source and effectively extend the service life of the entire system.
