軸受固定方式によるすべり軸受油膜係数測定の試み

抄録

Concerning a measurement of oil film coefficients of journal bearings, a new method is proposed in which a test bearing is fixed to a base rigidly as it is used ordinarily. Spring coefficients of oil film were obtained by measuring deviations of the journal center due to a small load exerted to a rotor. Damping coefficients were obtained by measuring bearing dynamic loads and journal center vibrations due to rotor unbalance. Experimental values were compared with predicted ones, and it was found that both were in good agreement, except c_xx and c_yy, as shown in other reports. Further, the complex eigenvalue analyses of the test equipment were carried out using the experimental values of oil film coefficients, and the results were compared with that obtained by blow tests. The results show that the proposed method is available for practical use.