INA plastic bearing abrasion damage comprehensive calibration method

Bearing has been widely used in many fields, understanding the factors that affect the INA bearing loss using bearing has important significance to us. First of all, measuring the size of the shaft and bearing seat holes, the precision of mutual cooperation, to make them fit for: the inner ring and the shaft to interference fit, 0 ~ + 4 um interference ( Under the condition of light load and high precision of 0) ; Outer ring and bearing hole should take clearance fit, the interval 0 ~ + 6 um ( But when using bearing, INA bearing on the free end should increase clearance) ; Shaft and hole surface roundness error in under 2 um, plastic bearings used in space ring width under 2 um, shaft shoulder end foreign face beat in under 2 um; Bearing hole block shoulder beating under 4 um of axis; The spindle axis inside the front cover end face fluctuations should be under 4 um. Then, the fixed end before the installation of the bearings on the shaft position: clean with clean kerosene INA bearings, and to the bottom of the test. For grease lubrication, first will contain 3% ~ 5% of organic solvent injection plastic bearing grease for degreasing cleaning, then quantitative grease oil gun will fill in the bearing inner ( Account for about 10% ~ 15%) of the bearing space ; Heating bearing to 20 ~ 30 ℃, bearing load shaft end with the hydraulic press, Will set casing pressure on the shaft and with appropriate pressure against bearing face makes its axial positioning; The lace will spring balance volume on the bearing outer ring, use the method of measuring start torque check is the preload of the regulation for substantial changes ( Even if the bearing is correct, as a result of improper or cage deformation, preload may change) 。 Then, we need to put INA bearings - Shaft assembly into the hole: heating holes make up 20 ~ 30 ℃, with a continuous gentle pressure of bearing - Shaft assembly into a hole; Adjust the front cover, make the front cover of fastening is 0. 02 ~ 0. 05 um to bearing outer end face as a benchmark, the dial gauge meter resistance on shaft neck surface, will beat measuring the rotation axis, request error under 10 um. Will be located on the shaft, dial gauge meter resistance in the back seat hole surface, the plastic shaft rotation to measure before and after bearing hole of the alignment. Loss of INA bearings use factors mainly refers to install, use, maintenance, maintenance, repair and so on meets the technical requirements. Installation conditions 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 run and loss. According to the plastic bearing installation, use, maintenance, maintenance of technical requirements, the operation of the 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.