自配流型液压冲击器建模与仿真

Modeling and simulation for a self-distributing flow hydraulic impactor

液压冲击器是工程施工中常用的液压设备。其工作过程中运动部件的高加速度及惯性工作油压的特性,使得其与常规液压设备工作状况有很大区别。在液压冲击器的研究过程有必要快速准确地建立计算仿真模型。在AMESIM系统中基于功率键合原理搭建的液压冲击器仿真系统,综合考虑了液压冲击器主要功能和特点,可快速实现对冲击器主要仿真参数的计算。利用现有的YYG250型液压凿岩机的冲击器设计参数进行仿真后,计算结果与实测工况参数之误差在5%之内,说明了仿真模型的正确性和可靠性。该模型对不同系列的冲击器的参数设计和冲击特性研究提供了良好的平台。

A hydraulic impactor is one of hydraulic equipments commonly used in engineering constructions.Due to higher acceleration of its moving components and the particular properties of its inertia working oil pressure during working,its working conditions are quite different from those of the conventional hydraulic equipments.It's necessary to establish its numerical simulation model rapidly and accurately.The hydraulic impactor simulation system based on the theory of power bond in AMESIM system,considering the main functions and characteristics of the hydraulic impactor,could quickly realize calculation of main simulation parameters of the impactor.From simulation of design parameters of the impactor of YYG250 hydraulic excavator,it was found that the error between the simulation results and the test ones was within 5%.It was shown that the simulation model was correct and reliable.This model provided a good platform for study on parameter design and shock properties of different series of impactors.