Application of ER gel with variable friction surface to the clamp system of aerostatic slider
Application of ER gel with variable friction surface to the clamp system of aerostatic slider
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DOI：
10.1016/j.precisioneng.2005.09.004
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发表时间：
2006-07
影响因子：
3.6
通讯作者：
Y. Kakinuma;T. Aoyama;H. Anzai;Hiroharu Sakurai;K. Isobe;Katsutoshi Tanaka
中科院分区：
文献类型：
--
作者：
Y. Kakinuma;T. Aoyama;H. Anzai;Hiroharu Sakurai;K. Isobe;Katsutoshi Tanaka
电流变流体（ERF）是一种功能流体，其粘弹性特性根据所施加电场的强度而变化。 ERF 是非导电硅油和无机/有机复合电流变颗粒的混合物。 ERF 的特性已被用来控制机器元件的性能。 ERF 已应用于可变阻尼器和离合器等机器元件。然而，ERF 也有缺点，即 ER 颗粒的沉降和需要密封机制。 ER颗粒的沉降降低了ER效应并导致ER器件的稳定性较低。为了抑制沉降，从而提高ERF器件的性能，开发了一种称为凝胶结构ERF（ERG）的新型功能材料，并在本研究中分析了其基本性能。 ER颗粒悬浮在凝胶成分中，因此不会沉淀出来。这抑制了由降水引起的ER效应的降低。开发的 ERG 显示出响应所施加电场的较大剪切应力变化。 ERG 的这种高性能源于与 ERF 的 ER 效应不同的机制。为了阐明 ERG 的机制，观察了电场下 ER 颗粒的行为。结果表明，电极和 ERG 界面处的接触条件响应所施加的电场而快速变化，从而导致剪切力的变化。在初步分析结果的基础上，将ERG应用于空气静压滑块精密夹具系统中，并对其性能进行了实验评估。
An electro-rheological fluid (ERF) is a functional fluid whose viscoelastic properties vary according to the intensity of the applied electric field. ERFs are mixtures of nonconductive silicone oil and inorganic/organic composite electro-rheological particles. The properties of ERFs have been exploited to control the performance of machine elements. ERFs have been applied to machine elements such as variable dampers and clutches. However, ERFs have disadvantages, namely the sedimentation of ER particles and the requirement of a seal mechanism. The sedimentation of ER particles reduces the ER effects and results in low stability of ER devices. In order to suppress the sedimentation, and thereby improve the performance of ERF devices, a new functional material called the gel-structured ERF (ERG) is developed, whose basic properties are analyzed in this study. The ER particles are suspended in the gel component, and thus will not precipitate out. This suppresses the decrease in the ER effect caused by precipitation. The ERG developed shows a large shear stress variation in response to the applied electric field. This high performance of ERG originates in a mechanism different from the ER effects of ERF. In order to elucidate the mechanism in ERG, the behavior of ER particles was observed under an electric field. The results show that the contact conditions at the interface between electrode and ERG change rapidly in response to the applied electric field, which result in a variation in shear force. On the basis of the results of a preliminary analysis, ERG was applied to the precision clamp system of an aerostatic slider, and its performance was assessed experimentally.