高效节能液控振动挖掘机及振动式铲斗

研究开发一种高效节能液控振动挖掘机及振动式铲斗,利用其结构设计和液压油路控制,实现高效节能液控振动挖掘机的振动挖掘方式,将传统的静态挖掘力变革为动态瞬间大的冲击挖掘力。目的是解决耗能大户挖掘机在硬地面、矿山碎石地面、山石地震等复杂地面施工中出现的低效率、高耗能问题。

高效节能液控振动挖掘机关键技术的研究开发

针对耗能大户挖掘机在硬地面、矿山碎石地面、山石地震地面等复杂地面施工中的低效率、高耗能问题,研究开发以振动冲击学为理论基础、在核心技术上具有自主知识产权的液压控制伺服阀和液压伺服控制系统以及振动式铲斗等高效节能液控振动挖掘机关键技术,将传统的静态挖掘力变革为动态瞬间大的冲击挖掘力,实现高效节能的振动挖掘方式。该振动挖掘方式与不振动挖掘方式相比,将减少挖掘阻力和提高挖掘工效25%以上、节能20%左右,推动挖掘机产业向高效、节能方面发展。

液控惯性振动系统仿真法研究

在对新型的液控惯性振动系统进行仿真时 ,针对容易出现的数学模型难以建立、仿真程序调试困难等问题 ,提出了“分段建模 ,串行仿真”的新方法 ,分别建立液控系统和机械振动系统模型 ,把复杂系统分成简单子系统 ,使系统仿真程序有了较强的通用性和灵活性 .实验表明 ,用上述方法建立起来的仿真模型是合理的 。

Active vibration control of multibody system with quick startup and brake based on active damping

A kind of active vibration control method was presented based on active damping and optimization design for driving load of multibody system with quick startup and brake. Dynamical equation of multibody system with quick startup and brake and piezoelectric actuators intelligent structure was built. The optimum driving load was calculated by applying the presented method. The self-sensing and self-tuning closed-loop active vibration control in quick startup and brake process was realized. The control algorithm, using local velocity negative feedback, i.e. the output of a sensor only affects the output of the actuator collocated, can induce damping effectively to actively suppress the system vibration. Based on the optimization design for driving load of multibody system with quick startup and bake, the active damping of piezoelectric actuators intelligent structure was used to farther suppress the vibration of system. Theoretical analysis and calculation of numerical show that the proposed method makes the vibration of system decrease more than the optimal design method for driving load of multibody system.