By studying dynamic characteristics of the leaf spring system, a new elastic component is designed to reduce the working load and to a certain extent to ensure the linearity as well as increase the amplitude in the vertical and horizontal directions in vibration screen. The modal parameters, amplitudes, and amplification factors of the leaf spring system are studied by simulation and experiment. The modal results show that the leaf spring system vibrates in horizontal and vertical directions in first and second mode shapes, respectively. It is conducive to loosening and moving the particles on the vibration screen. In addition, it is found that the maximum amplitude and amplification factor in the horizontal direction appear at 300 r/min (5 Hz) while those in the vertical direction appear at 480 r/min (8 Hz), which are higher than those in the disc spring system. Moreover, the amplitude of the leaf spring system increases proportionally with the increase of exciting force while the amplification factors are basically the same under different exciting forces, indicating the good linearity of the leaf spring system. Furthermore, the minimum exciting force occurs in the leaf spring system under the same amplitude by comparing the exciting force among different elastic components. The above works can provide guidance for the industrial production in vibration screen.

通过研究板簧系统的动态特性，设计了一种新的弹性元件，以减少工作载荷，并在一定程度上保证振动筛的线性度，并增加振动筛垂直和水平方向的振幅。通过仿真和实验研究了板簧系统的模态参数、振幅和放大系数。模态结果表明，板簧系统分别以第一和第二模态振型在水平和垂直方向振动。有利于振动筛上颗粒的松散和移动。此外，发现水平方向的最大振幅和放大系数出现在300 r/min（5 Hz），而垂直方向的最大幅度和放大系数出现在480 r/min（8 Hz），高于碟形弹簧系统。而且，板簧系统的振幅随激振力的增加成比例增加，而不同激振力下的放大系数基本相同，表明板簧系统线性良好。此外，通过比较不同弹性元件之间的激振力，在相同幅度下，板簧系统中出现的激振力最小。以上工作可为振动筛的工业化生产提供指导。通过比较不同弹性元件之间的激振力，在相同振幅下，板簧系统中出现的激振力最小。以上工作可为振动筛的工业化生产提供指导。通过比较不同弹性元件之间的激振力，板簧系统在相同振幅下产生的激振力最小。以上工作可为振动筛的工业化生产提供指导。