Study of Dynamic Vibration Absorber Stabilizing a Circuit Pressure in a Water Hydraulic System

动态减振器稳定水液压系统回路压力的研究

• 批准号: 07650185
• 负责人: HAYASHI Satoru
• 金额: $ 1.34万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07650185/
• 关键词: Water Hydraulics; Pressre Control Valve; Accumulator; Dynamic Vibration Absorber; Stabilization; Vibration Control; Numerical Simulation; Poppet Valve

The aim of this study is to obtain the stabilizing method of a high pressure water hydraulic supply system. The mathematical model has been derived as the system that the constant pump flow enters into a chamber which is connected with a poppet type safety valve, an output line terminated by a load restrictor, and accumulator as a dynamic absorber of vibration. The basic equations have been linearlized about the steady operating point. The effect of the main parameters on the system stability has been investigated by numerical simulation of the linearized equation and by experiment. Critical boundaries of stability are illustrated for the valve lift vs the supply pressure.Stability generally lowers as increase in the supply pressure. The damper installed to the valve shaft is particularly effective, and a sufficient damping coefficient can establish the complete stability over all region of the supply pressure. The complete stability is given also by a sufficient volume of the pump cha … More mber. Addition of an accumulator evidently improves the system stability. The geometry of the tube connecting the accumulator and the pump chamber markedly affects the stability, whose diameter and length have the optima. The shape of stability boundaries is not simple because defferent modes of unstable characteristic roots switches as change of the operating point. A higher charging gas pressure gives a better stability, but the pulsation of the pump is eliminated by a lower charging pressure.The theoretical model has been proved to be valid from experimental results of the static characteristics, the stability boundaries, and from the chaotic waveforms due to collision of the valve against the valve seat.Therefore, useful basic knowledges have been obtained for stabilizing method and active vibration control of the direct operating poppet valve circuit as a water hydraulic pressure regulator, and furthermore, for developement of a balanced piston type relief valve for a water hydraulics. Less

本研究的目的是获得高压水液压供给系统的稳定方法。数学模型被推导为系统，恒定的泵流量进入一个与提升式安全阀相连的腔室，一个由负载限制器终止的输出管线，以及作为动态振动吸收器的蓄能器。基本方程已关于稳定工作点进行了线性化。通过线性化方程的数值模拟和实验研究了主要参数对系统稳定性的影响。稳定性的关键边界是阀门升程与供应压力的关系。随着供应压力的增加，稳定性通常会降低。安装在阀轴上的阻尼器特别有效，足够的阻尼系数可以在供应压力的所有区域内建立完全的稳定性。足够的泵室容积也能保证完全的稳定性。累加器的加入明显提高了系统的稳定性。连接蓄能器和泵室的管道的几何形状对稳定性影响显着，其直径和长度具有最佳值。稳定边界的形状并不简单，因为不稳定特征根的不同模式随着工作点的变化而切换。较高的充气压力提供了更好的稳定性，但较低的充气压力消除了泵的脉动。静态特性、稳定边界以及阀门与阀座碰撞产生的混沌波形的实验结果证明了理论模型的有效性。因此，为直接操作提升阀电路的稳定方法和主动振动控制获得了有用的基础知识： 水压调节器，此外，还开发了水压用平衡活塞式溢流阀。较少的

项目成果

Toshiyuki Hayase and Satoru Hayashi: "Fundamental Study on Computer Aided Flow Field Control (State Observer for Flow System)" Transaction of the Japan Society of Mechanical Engineers, Ser.B.Vol.62, No.598. 2261-2268 (1996)

Toshiyuki Hayase 和 Satoru Hayashi：“计算机辅助流场控制的基础研究（流动系统的状态观测器）”日本机械工程学会会刊，Ser.B.Vol.62，No.598。

Hayashi, Satoru: "Chaotic Vibration in Direct Acting Poppet Valve" 19th International Congress of Theoreticat and Applied Mechanics, Abstract. 133 (1996)

Hayashi, Satoru：“直动提升阀中的混沌振动”第 19 届国际理论与应用力学大会，摘要。

早瀬敏幸: "スプール弁内非定常流の数値解析と過渡応答モデル" 計測自動制御学会第35回学術講演回講演論文集. 951-952 (1996)

Toshiyuki Hayase：“滑阀中非稳态流动的数值分析和瞬态响应模型”仪器与控制工程师学会第 35 届学术会议论文集 951-952（1996）。

Satoru Hayashi: "Stabilization of Water Pressure Regulation System" 日本機械学会東北支部第31回総会・講演会講演論文集. (1995)

林悟：《水压调节系统的稳定化》日本机械工程学会东北分会第31次全体会议论文集及演讲（1995年）。

林 叡: "バランスドピストン型リリ-フ弁動特性の数値解析(第1報,数値シミュレーションと実験的検討)" 油圧と空気圧. 28-2. 232-238 (1997)

Akira Hayashi：“平衡活塞式溢流阀工作特性的数值分析（第一篇报告，数值模拟和实验研究）”液压与气动28-2（1997）。