INA spherical roller bearing lubrication cyclical and damaged the key factors

Most of the spherical roller bearing damage for many reasons, such as more than previously estimated load, the effective sealing, tight fit too small, as a result of bearing clearance, and so on. Any of these factors factors there is its special damage forms and will leave a special signs of deterioration. Therefore, examining the damaged shaft bearing, in most cases can find its possible causes. For the commonly used INA bearings, under the condition of working temperature of about 50 ℃, lubricant should be replaced once a year. If the operating temperature is 100 ℃ or higher, even if its thermal stability is good, the lubricant should be replaced at least every three months at a time. If oil bath lubrication for water or external particles become polluted substances, must be replaced immediately. The service life of the grease for impossible or there is no longer effective lubrication applications, the available formulas to determine the service life of the grease. 日志L = ( 0. 018 f - 0. 025). T- 2. 77f+6. 3 L = grease life ( h） f = ( Speed) ( 分钟- 1) / bearing grease speed limit T = temperature operation practice, it is necessary to use there is more than the recommended amount of grease. When the required torque low, only need a very small amount of grease lubrication will be finished. When the speed is very low and exposure to dust or moisture, might almost be filled. Under the condition of high speed and high temperature usually need more frequent than in general lubrication. All of the friction resistance is basically in the INA bearing contains two hardened steel rings, multiple hardening of ball or roller, roller and a separation or roller or maintaining aircraft separation. These types are in use is divided into many types. Some types, such as needle column, may not have the inner ring, roller directly on hardening axis movement. Generally speaking, a third of the INA bearing damage resulting from the fatigue damage, a third of the other resulting from poor lubrication, a third of the other resulting from pollutants into the bearing improper handling or installation. However, the damage pattern is also related to industrial don't. Pulp and paper industry, for example, half is probably due to bad lubrication or pollution causes the damage of spherical roller bearing, not due to material fatigue.