Abstract

This article discusses the causes of vibrations depending on unbalanced hydraulic forces in rotating and non-rotating equipment in hydraulic plants within the scope of vibration measurement standards. The radial and axial positions of the turbine shaft, normal operating conditions, the absolute vibration of the signal output velocity during startup and shutdown during unbalance condition of the turbine, the proximity probes have been measured by TMO 793 accelerometer sensor and TMO 793 velocity sensor. The results obtained from the monitoring are analyzed and the first discussion is over the comparison of the current operating levels and vibration standards. Secondly, the comparison is analyzed in order to examine the improvement in vibration level of the elimination of hydraulic imbalance more comprehensively, considering the stability of the hydro turbine-generator unit, a proportional row damping force, proportional-order oil-film force and a hydraulic force and by creating a new non-linear proportional-order mathematical model. Changes in vibration levels and spectral bands for failure types are stated as well. The solution of this integrated and accurate mathematical model shows that it is useful and concise in the diagnosis and prediction of faults in hydropower plants.

摘要

本文讨论了在振动测量标准范围内，液压装置中旋转和非旋转设备的不平衡水力引起振动的原因。涡轮轴的径向和轴向位置，正常运行条件，涡轮不平衡状态下启动和关闭期间信号输出速度的绝对振动，接近探头已通过TMO 793加速度计传感器和TMO 793速度传感器测量。对监测结果进行了分析，首先讨论了当前运行水平和振动标准的比较。其次，进行比较分析，以更全面地考察消除水力不平衡对振动水平的改善，综合考虑水轮发电机组的稳定性、比例排阻尼力、比例阶油膜力和水力，建立新的非线性比例阶数学模型。还说明了故障类型的振动水平和频谱带的变化。该数学模型综合准确的求解表明其在水电站故障诊断和预测中的实用性和简洁性。