基于 MATLAB 的四杆／六杆颚式破碎机动态仿真

摘要

针对四杆/六杆颚式破碎机，建立其位置闭环矢量方程，给定机构的尺寸参数，经两次微分求出其加速度关系矩阵，编写各方程M函数，使用MATLAB中的Simulink仿真工具对其进行运动学、动力学仿真，求出各个构件的瞬时位置、速度和加速度。使用SimMechanics对机构的驱动力矩和各铰链处反力进行求解。结果表明，相比六杆颚式破碎机，四杆机构所需驱动力矩要小，摆杆铰链处反力和加速度值更小，摆杆角位移范围更大。%The position closed loop vector equations of four bar jaw crusher and six bar jaw crusher are set up ,the acceleration rela-tion matrixes are built by second differential method ,and M functions of the equations are written .By using Simulink in MATLAB , the kinematic and dynamic simulation is carried out ,and the instantaneous position ,velocity and acceleration of main components in four bar/six bar jaw crusher are obtained .The driving moment and the hinge reaction force are solved by SimMechanics .Results show that compared with six bar jaw crusher ,four linkage crusher need less driving moment ,with smaller reaction force on swinging rod hinged point and larger rocker's angular displacement range .