摘要
针对传统的平面二维振动筛参振质量大、湿分性能较差及工作效率较低等问题,提出了一种能够使管网产生可控的多点激振和多自由度振动的新型液压激振方法。开发了基于管网激振的液压激振测试系统;建立了基于AMESim的仿真模型;研究了溢流阀设定压力、转阀换向频率对激振压力及激振油缸活塞杆振幅的影响;采用位移传感器、信号调理器及数据采集卡对液压激振系统进行了振动测试,并对振动信号进行了滤波处理。研究结果表明:激振压力随系统压力的增大而增大,随转阀换向频率的增大而减小;活塞杆振幅随系统压力的升高而升高,随换向频率的增大而减小;试验测试振动曲线与仿真曲线较好吻合,揭示了液压激振系统转阀换向频率、系统压力与油缸振幅之间的耦合关系,表明该液压激振参数的可控性,以及使管网产生可控的多点激振和多自由度振动的可行性;基于AMESim的管网液压激振系统模型能真实反映系统的动态特性,可为液压激振系统的设计与分析提供一种新途径。
Aiming at the problems of large vibration quality,poor moisture performance and low work efficiency of traditional planar two-dimensional vibrating screen,a new hydraulic vibration mode which could generate controllable multi-point excitation and multi-degree of freedom vibration in pipe network was proposed.A hydraulic vibration testing system based on pipe network excitation was developed.The simulation model based on AMESim was established.The effect of set pressure of relief valve,reversing frequency of rotary valve on excitation pressure and amplitude of piston rod were studied.Then,vibration test of the hydraulic excitation system was carried out by using displacement sensor,signal conditioner and data acquisition card,the vibration signal was filtered and smoothed.The results indicate that the excitation pressure increases with the rising system pressure,but decreases with the descent of the valve reversing frequency.Besides,the amplitude of piston rod increases with the rising system pressure but decreases with the descent of the valve reversing frequency.The measured vibration curves basically coincide with the simulation curves,which reveals the coupling relationship among the reversing frequency of the rotary valve,the system pressure,and the cylinder amplitude;indicates the controllability of the hydraulic excitation parameters;demonstrates the feasibility of exciting the pipe network to generate multi-point excitation and multi-degree-of-freedom vibration.The pipe network hydraulic excitation system model based on AMESim can truly reveal the dynamic characteristics of the system,which provides a new way for the design and analysis of the hydraulic excitation system.
作者
张慧贤
朱德荣
郭兆锋
杨海军
布占伟
苗灵霞
ZHANG Hui-xian;ZHU De-rong;GUO Zhao-feng;YANG Hai-jun;BU Zhan-wei;MIAO Ling-xia(College of Mechanical Engineering,Luoyang Institute of Science and Technology,Luoyang 471023,China;Shanghai Best Automation Control Equipments Co.,Ltd,Shanghai 201818,China)
出处
《机电工程》
CAS
北大核心
2021年第6期762-767,共6页
Journal of Mechanical & Electrical Engineering
基金
国家自然科学基金资助项目(U1404513)
河南省高等学校重点科研资助项目(20A460020)
河南省重点研发与推广专项资助项目(202102210333)。
关键词
AMESIM
液压激振系统
动态特性
管网
AMESim
hydraulic excitation system
dynamic characteristics
pipe network
