INA outer spherical bearing lubricating oil to deal with the effect of fault - bearing knowledge

by:Waxing     2020-05-27
INA bearings in use process because of itself quality and external conditions, the bearing capacity, rotational accuracy and wear-resisting performance will change. When the outer spherical bearing performance index is lower than the use requirement and when not working, bearing fault even failure occurs, bearing in the event of failure after accidents, machinery, equipment will halt, appear to wait for all sorts of anomalies, loss of function causes were therefore need to find out in the short term, and take corresponding measures. Must be carried out on the bearing inspection and maintenance, inspection and maintenance to prevent failure is very important, in the work to review the rolling noise, vibration, temperature of bearing and lubricant. Under the condition of high speed, high temperature, outer spherical bearing position and clearance adjustment scheme of grease lubrication has not timely lubrication can be used. Through the circulation of lubricating oil, can take away a lot of calories. Is an important characteristic of lubricating oil viscosity, viscosity directly affect the liquidity of lubricating oil and the size of the friction surface is formed between the oil film thickness, INA bearings under the working temperature of lubricating oil viscosity is usually 12 - 15cst。 Speed the Gao Yingxuan lower viscosity, the more load weight should choose high viscosity. Commonly used lubricating oil has high-speed machine oil, machine oil, turbine oil, compressor oil, transformer oil, cylinder oil, etc. Oil lubrication methods include: a. Oil bath lubrication oil bath lubrication is the most common lubrication method, suitable for low, medium speed, bearing lubrication, bearing part of immersion in the slot, the bearing parts of lubricating oil by rotating, and then flow back to the oil level of oil tank should be slightly lower than the lowest at the center of the roller. b。 Oil drops oil lubrication is suitable for need to ration oil to outer spherical bearing parts considering thermal expansion bearing parts structural design, drops of oil every 3 - in general A drop of it is advisable to 8 seconds, too much oil will cause the bearing temperature increased. c。 Circulating oil lubrication oil pump in the conversion of the filter oil transfer to the bearing parts, through the bearing lubricating oil filter cooling after use. Because of the circulating oil can take away a certain quantity of heat, cooling the bearing, therefore method is suitable for high speed INA bearing parts. d。 Spray lubrication with dry compressed air after the sprayer and lubricating oil mixed form oil mist, spray bearing, can effectively make the outer spherical bearing cooling airflow and can prevent the intrusion. This method is suitable for high speed, high temperature lubrication bearing parts. e. Injection lubrication with oil pump to pass through the nozzle in high pressure oil bearing, the basic formulae for calculation of the fatigue life of rolling bearings into the INA bearing the bearing at the other end into the oil in the tank. When bearing at high speed, rolling element and cage with high rotate speed makes the surrounding air, the air in general it is difficult to be sent to the bearing lubricating oil lubrication method, then must use the method of high-pressure jet spray the lubricating oil to the bearings, the position of the nozzle should be placed between inner ring and retainer center. Bearing a lot of the reason of failure in addition to the normal fatigue spalling like failure caused by sealing, too close coordination with the factors such as poor lubrication bearing clearance or too small can traces of special failure and failure modes. So check the failure of the bearing can be found for most of the time the cause of bearing failure so as to take timely measures. In general INA bearing failure because a third bearing into the fatigue spalling period belongs to the normal failure; 1/3 one-third because bad lubrication cause early failure because of pollutants into the bearing or incorrect installation bearing failure in advance. In general is abnormal outer spherical bearing has the following seven kinds of common symptoms: bearing overheating, bearing too much noise, low bearing life, big vibration, short of machine performance requirements, bearing loose on the shaft, the shaft rotating difficulties.
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