Checking whether the universal coupling is abnormal during operation can not only ensure safety, but also improve the operating rate of mechanical equipment, and it is also beneficial to prolong the service life of the universal coupling. If any abnormality is found, the operation should be stopped immediately to find out the cause.
Regularly lubricate the bearings and splines. Except during operation, the oil should be injected once a week for six months, and once every six months after the working conditions are stable, and the spline shaft and the universal coupling used for the main drive of the rolling mill should be injected once every three months.
When abnormal sound, vibration, oil leakage and other abnormal phenomena are found, the machine should be shut down as soon as possible for decomposition and inspection. Even if no abnormality is found, regular inspections should be carried out, especially universal couplings that are used in important parts and long-term continuous use without stopping in the middle, and should be repaired regularly. The standard time is 5000 hours or one year, and the specific time should be determined according to the conditions of use.
When disassembling, remove the dirt and oil on the universal coupling, and prevent foreign matter from entering the bearing and spline. Before disassembly, use white paint to mark the joints, bearings, cross shafts and other parts to prevent misalignment during assembly.
Bearings and cross shafts cannot be cleaned in the same oil bath for cleaning other parts, and compressed air should be used to dry them after cleaning.
After disassembly, the main parts should be carefully checked for wear and damage, and replaced according to the degree. Check the cross shaft and rolling surface for peeling, pitting, abrasion and indentation. If such damage is found, replace it.
When assembling, proceed in the reverse order of disassembly, and press the white mark to make it the same position as before disassembly. The phases of the forks at both ends of the spline shaft and the spline sleeve must be the same; ensure that the axial clearance of the cross shaft is 0.05~0.10mm on one side; the coupling bolts should be pre-tightened with a torque wrench according to the specified pre-tightening torque; after assembly, Relubricate its bearings and splines.