共查询到17条相似文献,搜索用时 125 毫秒
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一种零泄漏密封技术-纳米磁性流体密封研究的进展 总被引:4,自引:0,他引:4
纳米磁性流体密封是一种新型密封技术,它具有零泄漏,无污染、无磨 损、寿命长,结构简单等其他密封方式所无可比拟的优点,介绍了纳米磁性流体密封的原理,磁场和密封压差的计算设计方法,密封能力的影响因素等问题的研究现状。对纳米磁性流体密封的市场前景作了展望,对其中存在的问题作了简要评述,并指出了它的发展方向。 相似文献
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采用有限元软件ANSYS对CXZL80装载机工作装置进行焊接残余应力变形的分析研究,并将计算机计算结果与实测数据进行对比,结果表明:动臂横梁焊缝附近存在较大的焊接残余应力变形,它们直接降低了构件的强度和刚度,影响了工作装置的性能。 相似文献
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Compared with traditional mechanical seals,magnetic fluid seals have unique characters of high airtightness,minimal friction torque requirements,pollution-free and long life-span,widely used in vacuum robots.With the rapid development of Integrate Circuit(IC),there is a stringent requirement for sealing wafer-handling robots when working in a vacuum environment.The parameters of magnetic fluid seals structure is very important in the vacuum robot design.This paper gives a magnetic fluid seal device for the robot.Firstly,the seal differential pressure formulas of magnetic fluid seal are deduced according to the theory of ferrohydrodynamics,which indicate that the magnetic field gradient in the sealing gap determines the seal capacity of magnetic fluid seal.Secondly,the magnetic analysis model of twin-shaft magnetic fluid seals structure is established.By analyzing the magnetic field distribution of dual magnetic fluid seal,the optimal value ranges of important parameters,including parameters of the permanent magnetic ring,the magnetic pole tooth,the outer shaft,the outer shaft sleeve and the axial relative position of two permanent magnetic rings,which affect the seal differential pressure,are obtained.A wafer-handling robot equipped with coaxial twin-shaft magnetic fluid rotary seals and bellows seal is devised and an optimized twin-shaft magnetic fluid seals experimental platform is built.Test result shows that when the speed of the two rotational shafts ranges from 0-500 r/min,the maximum burst pressure is about 0.24 MPa.Magnetic fluid rotary seals can provide satisfactory performance in the application of wafer-handling robot.The proposed coaxial twin-shaft magnetic fluid rotary seal provides the instruction to design high-speed vacuum robot. 相似文献
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高速大长径比搅拌轴密封可靠性问题,一直是从事密封工作者探索的问题之一。利用磁流体密封原理可解决因轴高速旋转摆动带来的密封困难问题。通过研究构建了高速大长径比搅拌轴磁流体密封动力学模型,设计了磁流体密封的结构,并通过实验进行了更为深入的研究,获得了较为满意的结果,为该技术的实际应用奠定了理论和实验基础。 相似文献
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