Affect the INA self-aligning roller bearing assembly factors service life

Bearing use factors mainly refers to install, use, maintenance, maintenance, repair and so on meets the technical requirements. According to INA bearing installation, use, maintenance, maintenance of technical requirements, the operation of the spherical roller bearing on the load, speed, temperature, vibration, noise and lubrication condition monitoring and inspection, found that abnormal immediately to find the reason, adjustment, so that it is back to normal. Installation condition is one of the primary factor of use factor, bearing is often caused by improper installation of a complete set of change the stress of bearing between various parts, bearing in the abnormal state of operation and the service life of the early end internal factors mainly refers to the structure design, manufacturing process and material quality and so on three major factors in determining the quality of bearing. 1, the selection of the bearing clearance: user when buying bearings generally just let us know in what type, grade, rarely on bearing clearance request, business people must ask INA bearing conditions of use, including spherical roller bearing of rotating speed, temperature, tolerance is directly related to the selection of the bearing clearance. Generally under 3500 RPM speed motor mostly adopts CM clearance, such as high temperature and high speed motor, require the use of relatively large clearance. Bearing clearance after assembly will rise because of the inner hole and cylindrical reduction and lead to reduce, the reduction of clearance = interference quantity x 60% ( Except the bearing chamber is aluminum) 。 Such as bearing clearance is zero before assembly. 01 mm, interference when assembling the quantity to zero. 01 mm, bearing assembly after the clearance of 0. 004mm。 In theory at zero clearance noise and bearing life can reach the best state, but in actual operation considering the problems such as temperature, bearing clearance to 0 after assembly. 002mm- 0. 004 mm is better. 2, the choice of grease: the choice of grease is generally based on the spherical roller bearing of rotating speed, heat resistance, noise requirements and choose starting torque, etc, require business personnel to the performance of a variety of oils and fats to be understood. 3, bearing type selection, bearing type is commonly used by the user's technical personnel according to the product of form a complete set of conditions and the load of INA bearings. Business people mainly learn the user's actual load is consistent with the selected bearing, if use of cylindrical roller bearing short of asks, should suggest customer re-election model as soon as possible, but unless special products on the choice models generally do not have what problem. 4, the choice of bearing seal type: spherical roller bearing can be divided into oil lubrication and grease lubrication. Oil lubricated bearing is generally choose form of bearing, grease lubrication INA bearings generally choose dust cover or rubber seal seal. Dust cover suitable for high temperature or the use of good parts, seal two points contact seal and non-contact seal and contact seal dustproof performance is good but the starting torque, the sealing type starting torque is small, but there is no contact sealing performance is good. Bearing materials of metallurgical quality were the main factors influencing the premature failure of the rolling bearing. As metallurgy technology, For example, the bearing steel vacuum degassing, etc. ) Progress, raw material quality is improved. Raw material quality factor in spherical roller bearing failure analysis share has declined obviously, but it is still the INA bearing failure of one of the main influence factors. Select material adequacy is still bearing failure analysis factors must be considered.