Measure the clearance of the outer ring of INA Bearing when the roller is sagging. First, ensure the bearing’s upright attitude, rotate the outer ring left and right for 1 / 2-1 turn, and any roller of the two rows of rollers is in the lower position respectively. Use a feeler gauge to measure the clearance. The measured position is somewhat different according to the outer diameter of ina bearing outer ring.
Measurement of bearing clearance with outer diameter of outer ring Tight Sleeve greater than 200mm
Insert the feeler gauge between the two rows of rollers directly above the INA Bearing and the outer ring and between the two rows of rollers and the inner ring at the left and right Tight Sleeve symmetrical position relative to the bearing center, and measure the internal clearance of each bearing.
The internal clearance r of the bearing is measured between the two rows of rollers directly below the bearing and the outer ring. The internal clearance of the bearing is set as RS1 ` RS2 respectively, and the internal Tight Sleeve clearance directly above the bearing is set as rs
Set the bearing internal clearance measured between the two rows of rollers and the outer ring at the left and right symmetrical positions Tight Sleeve relative to the bearing center and the clearance measured between the two rows of rollers on the left and the outer ring as RL1 ` RL2 respectively, and
Set the measured clearance between the two rows of rollers on the right Tight Sleeve side and the outer ring as R1 ` RR2 respectively, and the internal clearance of the bearing on the right side as RR
Calculate the internal clearance of Tight Sleeve the bearing with the following formula.
Precision improvement method of fag bearing
After fag bearing is installed in the main engine, if the radial runout of fag bearing spindle is measured, it can be found that the measured value of Tight Sleeve each revolution has a certain change;
During continuous measurement, it can be found that this change will Tight Sleeve approximately repeat after a certain number of revolutions. The index to measure the degree of change is the cyclic rotation accuracy.
The number of revolutions required for the approximate repetition of the change represents the “quasi period” of the cyclic rotation accuracy. The large magnitude change in the quasi period is the poor cyclic rotation accuracy.
If the fag bearing spindle is properly preloaded and the speed is gradually increased to close to the working speed, so as to implement the “running in” function of the bearing, the cyclic rotation accuracy of the spindle can be improved.