Principle and Simulation for Real-time Monitoring of the Non-contact Face Seal Based on POD Model
Principle and Simulation for Real-time Monitoring of the Non-contact Face Seal Based on POD Model
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发表时间：
2012
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通讯作者：
Chen Yao
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作者：
Chen Yao
针对非接触式端面密封性能实时获取过程中出现的复杂多维问题，提出了一种基于本征正交分解（POD）的降阶模型，利用该模型计算了密封微间隙产生的液膜力和液膜产生的不同方向力矩等动态密封性能参数，并利用POD降阶模型对密封微间隙产生的液膜力进行了分析，得到了密封微间隙的动态特性参数。提出了非接触式端面密封性能实时监测的原理，分析了不同轴向位置振动频率下的计算误差，并利用该原理对水润滑非接触式端面密封在不同密封间隙和液体振动频率下进行了数值模拟，得到了液膜力，结果表明，基于POD降阶模型的非接触式密封动态监测具有较高的精度，这将有助于提高非线性动态控制的研究水平，接触面密封及瞬态启动阶段密封的静、动态性能。
To solve the complex multi-dimensional problem arising in the process of obtaining the real-time performance of a non-contact face seal,a reduced order model based on proper orthogonal decomposition(POD) is proposed.With the model,the dynamic seal performance parameters are computed,including the liquid film force generated by the sealing micro-gap and different directional moments induced by the liquid film.With the POD reduced order model,the principle for the real-time monitoring of the non-contact face seal performance is presented,and the calculation error for different vibration frequencies of axial positions are analyzed.With the principle,a numerical simulation of a water-lubricated non-contacting face seal with different seal gaps and liquid vibration frequencies is implemented,and the liquid film force,torque and their calculation errors are obtained.The results show the high accuracy of the non-contact seal dynamic monitor based on the proposed POD reduced-order model,which will help to promote the level in researching the dynamic control of non-contacting face seals and the static and dynamic performances of seals during the transient start-up stage.