长转子有合成的不平衡力与同时作用的力偶,因此要想达到完全的动平衡只能在两个平面上进行补偿。这种情况下,为了确定所需要的补偿,要运转三次。实际上不平衡源可沿转子分布,但我们假定这种不平衡由作用在面1与面2上的力F_1与F_2来表示。 Long rotor has a combination of unbalanced force with the role of the couple at the same time, so in order to achieve complete dynamic balance can only be compensated in two planes. In this case, to determine the compensation needed, it should be run three times. In fact unbalance sources can be distributed along the rotor, but we assume that this imbalance is represented by forces F_1 and F_2 acting on planes 1 and 2.