实验7 回转构件动平衡实验（Experiment 7 dynamic balance test of rotating components）.doc

实验7 回转构件动平衡实验（Experiment 7 dynamic balance test of rotating components） Experiment 7 dynamic balance test of rotating components The dynamic balance of rotating components is an important problem in modern machinery, especially in high speed mechanical operation, unbalanced inertia force generated in motion caused by additional dynamic force. It will not only increase the internal stress and friction component in motion, will also reduce the mechanical efficiency and service life. Therefore, it is of great importance to grasp the principles and methods of dynamic balancing of rotating members. First, the purpose of the experiment To strengthen the basic concept of dynamic balancing of rotating components, and to be familiar with the basic working principles and operation methods of compensating dynamic balancing machines. Two, equipment and tools Frame type dynamic balancing machine; specimen rotor; balance weight; ordinary balance; caliper ruler. Three, principles and methods It has been stated theoretically that the dynamic balance of any rotating component can be considered as the unbalanced weight and produced in two arbitrary selected rotating planes respectively. Therefore, the balance of the experiment, the actual can be balanced regardless of components of the unbalanced weight and size of the plane, according to the actual shape of the components only need to permit selection of two rotary plane as the balance effect is flat, and the unbalanced weight as in the plane and. Then balance and balance can be achieved. In this experiment, the frame dynamic balancing machine is used to determine the magnitude and phase of the unbalanced weight in the equilibrium plane by the method of compensated gravity product. Fig. 7-1 frame type dynamic balancing machine As shown in Figure 7-1 frame type dynamic balancing machine, frame 1 by spring 2 and a fixed base 3 is connected, it can swing around the OX axis, constitute a vibration system, the frame is provided with a ma