Mechanism of electro-hydraulic exciter for new tamping device  

作　　者：刘毅 龚国芳 杨华勇 韩冬 杨学兰 

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2期511-520,共10页中南大学学报（英文版）

基　　金：Projects(50975252,51275499)supported by the National Natural Science Foundation of China;Project(2013CB035404)supported by the National Basic Research Program of China;Project(GZKF-201312)supported by Open Foundation of the State Key Laboratory of Fluid Power Transmission and Control,China

摘　　要：A new tamping device which is driven by an electrohydraulic exciter was proposed to overcome the limitations of mechanically driven devices.The double-rod oscillation cylinder drives the tamping arm to realize vibration.A new spin valve was designed in order to fulfill dynamic state requirements of the oscillation cylinder.Parametric analysis was carried out by establishing mathematic model.Then,the relationships among the structure of valve port and the frequency,amplitude,output shock force of the cylinder were researched.An experimental device of the electrohydraulic exciter was established to validate the theoretical results.The signals were acquired by AVANT dynamic signal analyser of vibration.The results show that new tamping device can satisfy all kinds of complex working conditions with the flexible adjustment of frequency and amplitude.A new tamping device which is driven by an electrohydraulic exciter was proposed to overcome the limitations of mechanically driven devices.The double-rod oscillation cylinder drives the tamping arm to realize vibration.A new spin valve was designed in order to fulfill dynamic state requirements of the oscillation cylinder.Parametric analysis was carried out by establishing mathematic model.Then,the relationships among the structure of valve port and the frequency,amplitude,output shock force of the cylinder were researched.An experimental device of the electrohydraulic exciter was established to validate the theoretical results.The signals were acquired by AVANT dynamic signal analyser of vibration.The results show that new tamping device can satisfy all kinds of complex working conditions with the flexible adjustment of frequency and amplitude.

关 键 词：tamping device spin valve oscillation cylinder electro-hydraulic exciter variable damping parametric analysis 

分 类 号：U216.631[交通运输工程—道路与铁道工程]