磁流变梯度捏合模式原型阀门动态范围评估

IF 2.2 3区 工程技术 Q2 ENGINEERING, MECHANICAL Actuators Pub Date : 2023-12-04 DOI:10.3390/act12120449
Jiří Žáček, J. Gołdasz, B. Sapiński, M. Sedlačík, Z. Strecker, M. Kubík
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引用次数: 0

摘要

已知磁流变(MR)流体对足够大的磁场起反应。当电场存在时,材料产生屈服应力。可调谐特性使其在半主动阻尼器应用中具有吸引力,特别是在振动控制领域。在给定的应用环境中,MR流体可以在至少一种基本工作模式(流动、剪切、挤压或梯度夹紧模式)下开发,其中梯度夹紧模式的探索最少。与其他操作模式相反,流动通道中的MR流体体积暴露在非均匀磁场中,从而仅通过壁面附近区域的固化材料而不是机械驱动通道几何形状的变化,在流动通道中形成文丘里式收缩。这种材料的挤压型流变特性使其成为开发一种新型MR阀的潜在候选材料。按照惯例,钳型阀具有单个流道的特点,其极点上产生非均匀磁场。在这项研究中,作者研究了通过采用一系列这样的安排(级)来扩展钳型阀动态范围的方法。为了实现这一目标,作者开发了一种多级(三级)阀的原型,然后将其与单级阀在各种液压和磁刺激下的性能进行了比较。综上所述,钳型阀动态范围的改进是明显的;然而,与此同时,流动通道中存在的一系列气隙阻碍了它的发展。
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Assessment of the Dynamic Range of Magnetorheological Gradient Pinch-Mode Prototype Valves
Magnetorheological (MR) fluids have been known to react to magnetic fields of sufficient magnitudes. While in the presence of the field, the material develops a yield stress. The tunable property has made it attractive in, e.g., semi-active damper applications in the vibration control domain in particular. Within the context of a given application, MR fluids can be exploited in at least one of the fundamental operating modes (flow, shear, squeeze, or gradient pinch mode) of which the gradient pinch mode has been the least explored. Contrary to the other operating modes, the MR fluid volume in the flow channel is exposed to a non-uniform magnetic field in such a way that a Venturi-like contraction is developed in a flow channel solely by means of a solidified material in the regions near the walls rather than the mechanically driven changes in the channel’s geometry. The pinch-mode rheology of the material has made it a potential candidate for developing a new category of MR valves. By convention, a pinch-mode valve features a single flow channel with poles over which a non-uniform magnetic field is induced. In this study, the authors examine ways of extending the dynamic range of pinch-mode valves by employing a number of such arrangements (stages) in series. To accomplish this, the authors developed a prototype of a multi-stage (three-stage) valve, and then compared its performance against that of a single-stage valve across a wide range of hydraulic and magnetic stimuli. To summarize, improvements of the pinch-mode valve dynamic range are evident; however, at the same time, it is hampered by the presence of serial air gaps in the flow channel.
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来源期刊
Actuators
Actuators Mathematics-Control and Optimization
CiteScore
3.90
自引率
15.40%
发文量
315
审稿时长
11 weeks
期刊介绍: Actuators (ISSN 2076-0825; CODEN: ACTUC3) is an international open access journal on the science and technology of actuators and control systems published quarterly online by MDPI.
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