Maintenance method of plain bearing
Damage type, damage reason, treatment methodGlue bearing overheating, excessive load, or improper operation of the temperature control system failure 1, in sports such as bearing overheating, should immediately stop check, the best of the rotor continues to operate at low speed, or continue to supply oil for a period of time, until the Bush cold down so far. Otherwise, the Babbit on the Bush is glued to the axle neck because it is glued, so it is troublesome to repair2, to prevent insufficient lubrication or oil impurities, and the rotor is not installed3, scuffing damage of lighter bearings can be scraped, repair methods to eliminate, continue to useFatigue failure caused by unbalanced vibration, shaft bending and edge loading, overload, etc., lead to fatigue rupture of babbit bearings.
The repair method is wrong and the installation is wrong. Use improper maintenance, quality control is not strict, 1, cleaning the shaft neck, oil circuit, oil filter, and replace the clean quality requirements of the lubricating oil2, with the repair after scraping the bush or new bush3, if found wrong installation, should be timely find4, pay attention to maintenance qualityBecause of the unreasonable structure of cavitation bearing (bearing on the oil is not reasonable, the shaft vibration), steam bubble formation of oil film bearing, steam bubble rupture, local surface creates a vacuum caused by small spalling cave erosion damage 1, increase the supply pressure2, improve the shape of the oil groove and groove, modify the edge or shape of the groove to improve the shape of the oil film streamline3, reduce the bearing clearance, reduce axle sway4, change the more suitable bush materialElectric erosion due to insulation is not good or bad ground, or static electricity, a certain voltage is formed between the shaft and bearing, penetrating the oil film between the shaft and bearing the spark, the insulation of the bearing into Pit 1, check the machine, special attention should be paid to some protective devices (such as heat resistance thermocouple wires are well insulated)2. Check the grounding of the machine3, if the damage after electrical erosion is not too serious, you can scrape the bearing4, check the journal, if the shaft on the electric erosion pit, should be polished shaft neck, remove the pit
Bearing repair, installation quality is not high, 1, improve installation quality, reduce bearing vibration2, to prevent partial load and overload3 、 adopt suitable Babbitt and new bearing structure4, strictly control the bearing temperature riseBecause the grease dirt nap of large particles into the bearing gap, and embedded in the bearing bushings, bearing and shaft neck (or thrust plate) contact, hard callus formation on the surface, it will seriously scratch the shaft, bearing oil picking attention clean, especially in maintenance, should pay attention to the metal chips or clean dirtWear and tear due to impurities in the lubricating oil, foreign matter and dirt.
