【摘要】 提出一种基于高速开关阀的电液振动冲击式剁锉机的液压系统,利用AMESim软件建立系统的仿真模型,分析系统的动态特性,探讨系统各主要结构参数对冲击能的影响。结果表明:调整系统压力ps、控制信号占空比τ和控制信号频率f,分别在2～7MPa、0.1～1和4～20Hz范围内,可以有效地控制冲击能的大小;在满足剁锉频率的基础上,增加活塞质量m,能有效提高冲击能;蓄能弹簧预压缩量x0和刚度k有优化范围,分别为x0=10～40mm和k=40～108N/mm。在仿真分析的基础上,研制剁锉机样机,并进行相关实验和试生产。结果表明,该系统能够满足实际生产的需要。更多还原

【Abstract】 A hydraulic system of file chopping machine was proposed based on electrohydraulic impact system with high-speed on-off valve.The simulation model was established by AMESim software.The system dynamic characteristics were analyzed,and the main system structure parameters,which influenced the impact energy,were explored.The simulation results show that:when system pressure ps is 2～7 MPa,duty ratio of control signal τ is 0.1～1,and frequency of control signal f is 4～20 Hz,the impact energy can be effectively controlled;increasing piston mass is a good method to enhance impact energy when the chopping frequency is satisfied;the two parameters have optimal ranges,namely accumulating spring pre-compression is 10～40 mm and stiffness is 40～108 N/mm.A file chopping machine was manufactured based on the simulations,and related experiments were made.Trial production shows that the system meets the industrial requirement.更多还原