Investigation of Dynamic Magnetic Fluid Seal Wear Process in Utility Water Environment
Investigation of Dynamic Magnetic Fluid Seal Wear Process in Utility Water Environment
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DOI：
10.4028/www.scientific.net/kem.490.143
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发表时间：
2011-09
期刊：
影响因子：
--
通讯作者：
Z. Szydło;M. Szczęch
中科院分区：
文献类型：
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作者：
Z. Szydło;M. Szczęch
当磁流体密封技术需要用于在水或其他液体环境中工作的组件时，会出现严重的问题。到目前为止，已经做出了一些努力来设计具有屏蔽件或机械密封件的混合的两级密封结构，该屏蔽件或机械密封件用作对磁性流体密封件的保护措施。无论如何，磁性液体与环境液体直接接触的问题迟早会出现。本文介绍了一级旋转磁流体密封与自来水直接接触的实验结果。为了确定磁流体密封的主要特性和简化实验，详细阐述了特殊的试验方法并进行了实际应用。这些特性是：临界压力、临界运动速度和密封的工作寿命。在单级密封系统中测试了四个等级的具有疏水性能的商业硅基磁流体。试验结果以图表形式给出。结果表明，疏水性商品磁流体可有效地用于旋转轴密封，但在有限的和相当低的运动速度范围内。
Serious problems arise when the magnetic fluid seal technology is needed to use in assemblies working in water or other liquid environment. Some efforts have been up to time made to design hybrid, two stage sealing structures with shields or mechanical seals used as protection measures to the magnetic fluid seal. Anyway, earlier or later there is always problem with direct contact between magnetic fluid and the environmental liquid. In the paper are presented results of experiments carried out with one stage rotating magnetic fluid seal operating in an direct contact with utility water. The special test procedures have been elaborated and practically used, with the aim to define main characteristics of magnetic fluid seals and to simplify experiments. These characteristics were: critical pressure, critical motion velocity and working life of the seal. Four grades of commercial, silicon based magnetic fluids of hydrophobic properties were tested in a single stage sealing system. The results of tests are presented in the form of tables and diagrams. It is concluded that hydrophobic commercial magnetic fluids could be efficiently used in rotating shaft seals however within limited and rather low range of motion velocity.