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一、前言汽轮机主轴绝对振动的非接触式测量,是近来国际上所采用的较为先进的振动测量方式目前,国内绝大部分汽轮发电机组还没有采用这种振动监测方式,其主要原因是还有很多技术问题有待解决,其中最主要的问题之一是:“组合传感器的相位补偿问题”。本文针对组合传感器相位差产生的原因,提出了一种经试验证明效果良好的相位补偿方式,采用此补偿方式可使组合传感器的“信号相加误差”小于0.3％,显著地提高了主轴绝对振动的测量精度。
I. Preface The non-contact measurement of the absolute vibration of the steam turbine main shaft is the most advanced vibration measurement method used internationally recently. At present, most of the domestic steam turbine generator sets have not adopted this kind of vibration monitoring method. The main reason is that the There are many technical problems to be solved, one of the most important issues is: “combined sensor phase compensation problem.” In this paper, aiming at the reason of the phase difference of the combined sensor, a phase compensation method which is proved to be effective by experiments is proposed. By using this compensation method, the “signal additive error” of the combined sensor is less than 0.3% and the absolute vibration The measurement accuracy.