クランク軸-ダンパ系の運転時における三次元振動の実験的研究 : ダンパがクランク軸のねじり方向, 軸方向, 半径方向振動に及ぼす影響

抄録

To investigate the influence of crankshaft torsional and bending dampers on the crankshaft vibrations, we first designed three kinds of dampers, each for the reduction of the crankshaft vibration, in the torsional, axial, and radial directions. Next, we developed two kinds of dampers for the simultaneous reduction in the torsional and axial modes, and in the torsional and radial direction modes. We mesured the three dimensional vibrations for the crankshaft, under engine operating conditions with a four-cylinder in-line diesel engine. The effectiveness of the axial dampers and the bending dampers (i.e. radial dampers) was investigated carefully. The coupling behavior of the torsional, axial, and bending vibrations was also investigated for the dampers and the crankshaft. In the series of experiments, we found that, in some cases, only by attaching one simple torsional damper, significant reduction of the axial and bending vibrations could be obtained together with the reduction of torsional vibrations.