| 摘要 |
PURPOSE:To inhibit torsional vibration with excellent efficiency by mounting a plurality of annular mass bodies to the crankshaft through an annular elastic seat and gradually dispersing torsional vibration generated in the crankshaft to a plurality of secondary torsional vibration. CONSTITUTION:A rim section 3 is formed at the end section of the crankshaft 1 through a flange section 2, and pulleys for driving every kind of donkey engines are disposed at the end section. In this case, the first and second annular elastic seats 4, 5 consisting of an elastic material such as a rubber are set up around the rim section 3 while the pulleys 6, 7 for driving the first and second auxiliary machine, which are composed of a metallic material and function as the annular mass bodies, are mounted around each elastic seat 4, 5, Belt grooves 8, 9 are each formed to serveal pulley 6, 7. Accordingly, one torsional vibration generated in the crankshaft 1 is dispered to the first and second sectondary torsional vibration by means of the pulley 6, and the fitst secondary torsional vibration is dispersed to the third and fourth seconary torsional vibration by means of the pulley 7. |
