楼主
图1里的是30万公里出头时的状态，原厂，垫圈washer、中央螺栓centre bolt也是原厂。
“谐波阻尼器是一种安装在内燃机曲轴自由（辅助驱动）端的装置，用于抵消曲轴产生的扭转和共振振动。该装置必须与曲轴过盈配合才能有效运行。过盈配合确保设备与曲轴完美同步。对于具有长曲轴的发动机（例如直六或直发动机）和带有交叉平面柄的V8发机，或点火顺序不均匀的V6和直三发机而言，它必不可少的。谐波和扭转振动会xxx缩短曲轴寿命，或者如果曲轴以放的共振运行或通过放大的共振运，则会导致瞬时故障。阻尼器的计具有特定重量（质量）和直径，具体取决所使的阻尼材料/方法，谐波平衡器（有时称为曲轴减振、扭转减振或减振器）与谐波减振器相同，只是平器包括一个重以外部平衡旋转组件。谐波平衡器常用作驱动交流发机、水泵和其他曲轴驱动置的附件驱皮带皮带。”
"A harmonic damper is a device fitted to the free (accessory drive) end of the crankshaft of an internal combustion engine to counter torsional and resonance vibrations from the crankshaft. A harmonic balancer (sometimes called crankshaft damper, torsional damper, or vibration damper) is the same thing as a harmonic damper except that the balancer includes a counterweight to externally balance the rotating assembly. The harmonic balancer often serves as a pulley for the accessory drive belts turning the alternator, water pump and other crankshaft driven devices."
