一种转子动态不对中量计算方法

摘要

从运动学角度出发，分析了双跨转子系统的运动特性和运动形态，提出了一种转子动态不对中量的定量计算方法。该方法通过安装在转子系统上的电涡流传感器获得转子运动的轴心位置信息，根据相似三角形定理，计算获得两根转子在联轴器处的轴心平动位移和角位移，再根据矢量合成法则，即可获得两根转子在联轴器处的平行不对中量以及角度不对中量。工程实践表明，该方法确定的不对中故障类型与特征典型的不对中故障类型表现出的时域波形特征、频谱特征以及轴心轨迹特征一致。该方法不但能够准确地诊断不对中的种类，而且能够得到不对中的定量结果，为工程实际中不对中故障的处理及轴系对中提供了量化参考。%The kinetic characteristics and motion forms of a twin-rotor system were analyzed from the kinetic point of view,and a novel quantitive calculation method of dynamic misalignment was pro-posed.The average shaft centerline positions were collected by eddy current transducers mounted on the rotor system,and translation displacements and angular displacements of shaft centerlines were calculated based on similar triangle theorem.Then according to vector synthesis principle, the amounts of the parallel misalignment and angular misalignment of the two rotors at the coupling were obtained.Engineering practices show that the calculation results are consistent with the typical features of the misalignment faults in time wave,spectrum and shaft centerline orbit.The forms and amounts of the misalignment faults might be obtained directly by this method.The novel method ben-efits the treatment of misalignment faults and shafting alignment in engineering practices.