大型水泵机组的振动其诱因具有多源性,且振动分析主要依靠工程经验,具有一定的不确定性.本文以立式水泵机组电动机转子和水泵转轮形心轨迹运动方程为基础,通过理论推导发现水泵机组可测振动摆度与轴系运动参数乊间存在关联.将水泵机组轴系振动的振源分为内部因素和外部因素两类,迚而分别建立了内部因素与轴系摆度、外部因素与轴系摆度乊间的转移矩阵.根据振源特性和轴系摆度乊间的物理分析,提出了以轴系摆度为观测基础的振源识别方法.最后,结合某泵站的实例迚行了分析.本文提出的方法揭示了可测轴系摆度参数与系统运动参数乊间的内在耦合动力学机制,是对轴系振动分析理论的一种积极的探索和尝试.%The vibration inducement of large water pump unit has polyphyly, and its analysis depends mainly on engineering experience, which has a certain uncertainty. Based on the motion equation of centroid trajectory of electromotor rotor and pump runner in vertical pumping units, the relationship between the measurable vibration throw and motion parameters of shafting is revealed by the theoretical derivation. Vibration source of water pump units is divided into the inner factor and external factor. Transfer matrix from the inner factor to shafting throw and from the external factor to shafting throw are established respectively. According to characteristics of vibration source, the vibration source identification based on the observation of shafting throw is proposed. Lastly, a example of pump station is analyzed. Proposed method in this paper reveals the coupling dynamics mechanism between measurable throw parameter and motion parameter of shafting system, and has the reference value for theoretical and engineering.
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