High temperature NTN bearing various failure reason and basic method of detection

NTN bearing in the work, because of the influence of the external or internal factors, change the original fit clearance, lower accuracy, and the change of 'killed' called clearance failure. , large amount of the external factors such as interference of installation does not reach the designated position, temperature rise caused by the expansion, instantaneous overload, etc. , internal factors such as residual austenite and the residual stress in a state of flux and so on all is the main reason for the failure caused by clearance changes. 1. NTN bearing if get good lubrication, and cut off the right moisture and debris, said oil seal should not wear. However, best when open the bearing box, check the bearing and periodically check the oil seal. Check of the condition of the near the high temperature bearing oil seal, in order to make sure they are enough to prevent hot corrosion along the axis of the liquid or gas into liquid or bearing, oil seal if already wear should be replaced as soon as possible. 2. High temperature often said bearing is in abnormal situation. High temperature also harmful to within the bearing lubricant. Sometimes bearing overheating can be blamed on NTN bearing lubricant. If the bearing in more than 125 degrees Celsius temperature operation for a long time, will reduce the bearing life at high temperature. The causes of high temperature bearing include: insufficient lubrication or excessive lubrication, lubricants containing magazine, heavy load, bearing damage, clearance, and the oil seal of high temperature and friction and so on. 3. Check the status of the operation of the machine, monitoring, lest cause the equipment downtime. As long as the preventive maintenance and testing, NTN bearing high temperature bearing must can do service for mechanical long-term operation. Because the earlier found that the problem will get good solve, effectively increase the service life of the bearing. The following is bearing maintenance and testing of several matters needing attention. 1, in the process of using the NTN bearing, regular cleaning is very first. How accurate cleaning bearing? Bearing will be removed when checking first, with the way such as photography first appearance record. In addition, to confirm the amount of residual lubricant and lubricant sampling, and then clean the bearing. 2, NTN bearing cleaning rough washing and fine washing suspension, can be put in use at the bottom of the container and on the metal frame. 3, rough washing, in oil partly brush eliminate grease or adhesive. If at this time in oil migration transformation high temperature bearing, note due to foreign bodies such as blending mutilate rolling surface. 4, fine cleaning, slowly in the oil migration change bearing, must be hard to stop. 5, daily use of cleaning agent for neutral aqueous diesel or oil, according to the demand is also sometimes use warm lye, etc. No matter use which kinds of detergent, often should clean filter confrontation. 6, after cleaning, immediately on the NTN bearing coating anticorrosive oil or antirust grease.