直接潤滑式ティルティングパッドジャーナル軸受の温度および動特性に対する給油量の影響

抄録

A direct-lubrication tilting pad bearing with a diameter of 120mm is tested to clarify the effect of the oil flow rate on the characteristics of the bearing. Measured characteristics are the bearing temperature and dynamic characteristics, namely, bearing stiffness and damping coefficients. The applied load and the peripheral speed, as well as, oil flow rate are changed. The higher the oil flow rate is, the lower the bearing temperature is. At the specific load of 1.0 MPa and the peripheral speed of 90 m/s, the bearing temperature at the oil flow rate of 14 L/min is 102 ℃, while it is 83 ℃ at 42 L/min, and the difference is as much as 19 degree centigrade. Dynamic characteristics measured are also variable with respect to the amount of oil flow rate. The lower the oil flow rate is, the lower the damping coefficients are. As for stiffness, the values at oil flow rate of 14 or 28 L/min can be lower or higher than that at high oil flow rate of 42 L/min.