Waveforms analysis and optimization of new electro-hydraulic excitation technology  

作　　者：韩冬 龚国芳 杨华勇 刘毅 廖湘平 

机构地区：[1]State Key Laboratory of Fluid Power Transmission and Control (Zhejiang University)

出　　处：《Journal of Central South University》2014年第8期3098-3106,共9页中南大学学报（英文版）

基　　金：Project(51275499)supported by the National Natural Science Foundation of China;Project(2013CB035404)supported by the National Basic Research Program("973" Program)of China;Project(51221004)supported by the Science Fund for Creative Research Groups,National Natural Science Foundation of China

摘　　要：A new electro-hydraulic exciter that consists of rotary valve and micro-displacement double-functioned hydraulic cylinder was proposed to realize different kinds of waveforms.Calculated fluid dynamics(CFD) simulation of rotary valve orifice reveals that orifice exists the two-throttle phenomenon.According to the finding,the revised flow area model was established.Vibration waveforms analysis was carried out by means of mathematic model and the related experiments were validated.Furthermore,as a new analysis indicator,saturation percentage was introduced first.The experimental results indicate that the revised flow area model is more accurate compared to the original one,and vibration waveforms can be optimized through suitable spool parameters and the revised cylinder structure.A new electro-hydraulic exciter that consists of rotary valve and micro-displacement double-functioned hydraulic cylinder was proposed to realize different kinds of waveforms. Calculated fluid dynamics （CFD） simulation of rotary valve orifice reveals that orifice exists the two-throttle phenomenon. According to the finding, the revised flow area model was established. Vibration waveforms analysis was carried out by means of mathematic model and the related experiments were validated. Furthermore, as a new analysis indicator, saturation percentage was introduced first. The experimental results indicate that the revised flow area model is more accurate compared to the original one, and vibration waveforms can be optimized through suitable spool parameters and the revised cylinder structure.

关 键 词：rotary valve micro-displacement double-functioned hydraulic cylinder two-throttle phenomenon revised flow areamodel saturation drift motion 

分 类 号：TH137[机械工程—机械制造及自动化]