柴油机曲轴的动平衡试验,由于结构上的特殊性,实际做起来是比较麻烦的。其配重用的平衡块装在各挡曲臂上,其重心分别在互成72°的方向上。设计规定沿平衡块表面切除材料以达到平衡,因此,用动平衡机做试验时,不一定在仪表指出的不平衡重的方向,恰好有合适的平衡块可去重。为达到动平衡,必须将不平衡重按一定关系分解到各挡去切除。过去一般是凭经验去重,然后上平衡机检验,如此反复进 Diesel engine crankshaft dynamic balance test, due to the particularity of the structure, actually do is more troublesome. Its weight with the balance block installed in each block crank arm, its center of gravity in the direction of each other in the direction of 72 °. The design requires that materials be cut along the surface of the counterbalance to achieve equilibrium. Therefore, when the test is carried out with a counterbalance machine, it is not always possible to correct the counterweight in the direction indicated by the counter. In order to achieve dynamic balance, it is necessary to decompose the imbalances by a certain relationship to each block to be removed. The past is generally based on experience to weight, and then check on the balance machine, so repeatedly