含黏性摩擦的转子/定子碰摩实验研究

Experimental analysis of rotor/stator rubbing with viscous friction

摘要

为了研究转子/定子碰摩在黏性环境下摩擦力参数以及相应的碰摩响应特性。采用了3种不同长度的转轴和3种不同材料的定子进行实验，同时还在碰摩面上涂抹了润滑剂以增强黏性阻尼效应。首先对不同的转子/定子系统进行了参数估算，以便能够更准确地模拟和预测系统的行为。随后，通过测量系统在不同转速下的响应，观察了不同转子/定子碰摩系统的响应特性，基于测量的位移响应数据，利用惯性坐标系的离散规则以及运动微分方程，对碰摩过程中的黏性摩擦力进行了估算，并预估了不同转子/定子碰摩系统的黏性阻尼系数。最后，对比了理论计算得到的转速区间与实验中测量的转速区间，发现实验结果与理论预测比较吻合，验证了含黏性阻尼摩擦模型理论分析的有效性。通过对含黏性阻尼摩擦模型的研究，可以更准确地理解和预测转子/定子碰摩系统的行为，并为设计和优化旋转机械中的转子/定子系统提供了重要的理论依据和技术支持。

Abstract

We aimed to study the frictional force and corresponding rubbing response of rotor/stator rubbing in a viscous environment. In this paper, three different lengths of shafts and three different materials of stators were used for the experiment, and lubricants were also applied on the rubbing surfaces to enhance the viscous damping effect. First, the parameters of different rotor/stator systems were estimated to more accurately simulate and predict the behavior of the system. Subsequently, by measuring the response of the system at different rotational speeds, the response characteristics of different rotor/stator rubbing systems were observed. Based on the measured displacement response data and using the discrete rules of the inertial coordinate system and the differential equation of motion, the viscous friction force during the rubbing process was estimated, and the viscous damping coefficients of different rotor/stator rubbing systems were predicted. Finally, the theoretical calculation of the speed range was compared with the experimental measurement of the speed range. It was found that the experimental results were in good agreement with the theoretical prediction, which validated the effectiveness of the theoretical analysis of the viscous damping friction model. Through the study of the viscous damping friction model, the behavior of the rotor/stator rubbing system can be more accurately understood and predicted, providing important theoretical basis and technical support for the design and optimization of rotor/stator systems in rotating machinery.

关键词

转子/定子碰摩 / 黏性阻尼摩擦模型 / 实验测量 / 黏性阻尼摩擦力

Key words

rotor/stator rubbing system / viscous damping friction model / experimental measurement / viscous damping friction

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基金资助

国家自然科学基金资助项目(12172267)

国家自然科学基金资助项目(11972274)