转阀式液压激振器低频特性研究  

Research on Low Frequency Characteristics of Rotary Valve Hydraulic Exciter

作　　者：姜志宏[1] 郭河舟 李宇达 龙小建[1] 宣律伟 JIANG Zhihong;GUO Hezhou;LI Yuda;LONG Xiaojian;XUAN Lüwei(School of Mechanical and Electrical Engineering Jiangxi University of Science and Technology,Ganzhou Jiangxi 341000,China)

机构地区：[1]江西理工大学机电工程学院,江西赣州341000

出　　处：《机械设计与研究》2020年第4期65-68,80,共5页Machine Design And Research

基　　金：国家自然科学基金资助项目(51464017);江西省教育厅科技资助项目(GJJ180452)。

摘　　要：为研究转阀式液压激振器的低频特性,以双出杆液压缸和转阀式激振器组成的液压激振系统为对象。通过理论与仿真分析,建立液压激振器过流面积为核心的数学模型,以转速、压差为变量,分析液压激振器的位移动态响应特性。结果表明:激振器位移呈梯形脉冲波形,定压差情况下,随频率的增大,活塞在液压缸中位移幅值接近理论值;定转速情况下,随压差增大,位移幅值增大。In order to study the low-frequency characteristics of the rotary valve hydraulic exciter.A hydraulic excitation system consisting of a multi-rod hydraulic cylinder and a rotary valve exciter is targeted.Through the theory and simulation analysis,the mathematical model of the hydraulic shock absorber over-flow area is established.The displacement dynamic response characteristics of the hydraulic exciter are analyzed with the rotation speed and pressure difference as variables.The results show that the displacement of the exciter is trapezoidal pulse waveform.Under the condition of constant pressure,the displacement amplitude of the piston in the hydraulic cylinder is close to the theoretical value with the increase of the frequency.Under the condition of theconstant rotate speed,the displacement amplitude increases and the displacement amplitude increase.

关 键 词：转阀 液压激振 低频特性 位移动态响应特性 

分 类 号：TH137[机械工程—机械制造及自动化]