【摘要】 介绍了一种磁流体粘度测试系统,可用于研究磁流体动密封磁场对磁流体粘度的影响。在该系统中驱动外筒的电机转速的变化与填充在固定内筒和外筒之间的磁流体粘度成反比,而模拟磁流体动密封运行工况的磁路则提供了定量的可变的外磁场,另外基于外推法的温度测量方案可精确地对测试时的温度进行控制,最后使用标准液体标定的结果表明其相对误差小于0.83%。更多还原

【Abstract】 This project developed a type of magnetic fluids(MFs) viscometer applicable to study the influence of magnetic field on the viscosity of MFs in dynamic sealing. The rotating speed of the motor driving the outer barrel indicated the viscosity of MFs filled in the space between the inner barrel fixed and the outer barrel. Magnetic curcuit simulating the operating condition of MFs dynamic sealing provided the measurement with the variable quantitative magnetic field. The method of the measurement of temperature based on the extention controled the temperature of MFs precisely when the measurement was performing. Calibration using the standard liquid showed that the relative error was less than 0.83%.更多还原