工程设计学报2016，Vol.23Issue(3)：288-294,7.DOI:10.3785/j.issn.1006-754X.2016.03.015
液压凿岩机配流阀零位开口设计与实验研究
Design and experiment on the opening at zero position of distribute valve of hydraulic rock drill
摘要
Abstract
With the high accuracy requirement of the guide-localization of the distribute valve,the manufacture of the valve is more difficult when the design of positive opening at the zero position is used in the hydraulic rock drill,and the leakage of the drill is larger,which reduces the working efficiency of the hydraulic rock drill.So a design approach to the negative opening at the zero posi-tion and a computing method for the pressure increment of it were put forward to solve this prob-lem on the basis of an analysis and comparison of advantages and disadvantages of the positive o-pening and negative opening at the zero position respectively.The mathematical model of the valve whose opening was at zero position was therefore established based on the coupling of the accu-mulator and local resistance.Through the mathematical model,the non-linear equation of the o-pening motion of the core was obtained.The kinematics of the opening motion at zero position of the valve was simulated in Simulink to analyze and compare the influence of different opening types on the impact property and the pressure of the drill.Compared with the experiment result, the simulation result was verified.The results showed that the design of the negative opening at the zero position of the distribute valve of the hydraulic rock drill optimized the way of guide-lo-calization and reduced the manufacturing difficulties,in addition,the working efficiency of the hy-draulic rock drill was increased by 9.2% and the impact energy at a time was increased by 12.5%.Considering the high reliability and efficiency,the design of the negative opening at the zero position is finally selected to be used in the actual working conditions.关键词
液压凿岩机/配流阀/零位负开口/制造工艺/蓄能器耦合Key words
hydraulic rock drill/distribute valve/negative opening at zero position/manufacturing process/coupling of the accumulator分类
矿业与冶金引用本文复制引用
赵宏强,傅斯龙,周茂贤,陈庆..液压凿岩机配流阀零位开口设计与实验研究[J].工程设计学报,2016,23(3):288-294,7.基金项目
国家自然科学基金资助项目(51375499). （51375499）
