电流变智能轴承挤压性能分析

Analysis of squeeze behaviour for electrorheological (ER) “Smart” bearing

电流变流体的流变性质可以通过调节外加电场（或电压）来控制，且响应时间极短，为此可用来制成电流变智能轴承。这种轴承的优点是可由计算机来监控轴承的工作状态，并根据其工作条件的变化来控制电压高低，从而改变轴承的性能，以适应外界环境。本文采用作者提出的以二次规划法为基础的双线性流变有限元法分析了电流变智能轴承的恒载径向挤压特性，给出了在不同外界电压下的轴承油膜沉降速度和时间曲线，通过数值讨论，证明电流变轴承具有很强的油膜保持能力的优点。

\ Because the rheological behaviour of electrorheological (ER) fluids can be controlled by applied electric field (or voltage) in a very short response time (in the order of millisecond), a so called ER “Smart” bearing has been developed. The work state of such a bearing can be monitored by a computer, so that the bearing behaviour can be improved by applied voltage across the oil film. In this paper, the squeeze film behaviour under constant load is analyzed by using bilinear rheological finite element method provided by authors and the curves of oil film squeeze velocity and time are presented under several applied voltage. It is founded that the ER journal bearig has a strong oil film keeping ability.