汽轮发电机组动静碰摩故障分析及诊断方法研究

发布时间：2018-03-03 22:38

本文选题：汽轮发电机组　切入点：动静碰摩　出处：《华北电力大学（北京）》2011年硕士论文　论文类型：学位论文

【摘要】：动静碰摩故障是汽轮发电机组中常见的故障之一。机组碰摩故障发生之后轻者将会导致机组振动过大无法正常启动和运行,严重时将会造成转子的永久弯曲,甚至造成整个机组的损坏。因此,如何快速准确地诊断出机组碰摩故障,防止碰摩故障继续恶化,排除故障减小经济损失将是整个故障诊断中的工作重点。本文通过分析大量的现场汽轮发电机组动静碰摩故障案例,‘深入研究了汽轮发电机组动静碰摩故障。按照不同的故障发生位置和碰摩故障发生时期对机组动静碰摩故障进行分类,并按照不同的分类进行故障原因的详细总结。在对机组动静碰摩故障机理研究方面,通过划分机组在不同运行阶段来分析其碰摩振动故障的机理,找出机组在不同运行阶段的碰摩振动故障特征。在对机组动静碰摩故障监测方面提出了详细的监测参数和监测方法,以及对后期数据处理反映出的碰摩故障特征进行了总结。在碰摩故障处理方面,通过划分机组在不同阶段和不同故障原因引发的碰摩故障方面进行了分类整理,对于处理实际机组中的碰摩故障具有非常高的参考价值。在动静碰摩故障诊断方面,通过总结的故障征兆及故障原因制定出机组碰摩故障的FMEA和FTA,运用其相结合的方法制定出机组动静碰摩故障的诊断流程图。最后通过对现场350MW机组发生振动故障事故采用本文提出的诊断方法和处理措施,准确地诊断出和解决了该机组发生的轴瓦与轴颈碰摩故障,验证了论文提出的诊断方法实际应用的可行性。
[Abstract]:Dynamic and static rub-impact fault is one of the common faults in turbine-generator set. After the unit rub-impact fault occurs, the lighter will cause the unit vibration too large to start and run normally, and when serious, it will cause the permanent bending of the rotor. It even causes damage to the whole unit. Therefore, how to diagnose the rub-impact fault of the unit quickly and accurately, so as to prevent the rub-impact fault from getting worse, Eliminating faults and reducing economic losses will be the focus of the whole fault diagnosis. By analyzing a large number of cases of dynamic and static rub-impact faults of turbine-generator units in the field, the paper deeply studies the static-rub-impact faults of turbo-generators. According to the different fault location and rub-impact fault occurrence period, the dynamic and static rub-impact faults of the unit are classified, According to different classification, the causes of the fault are summarized in detail. In the aspect of the research on the mechanism of dynamic and static rub-impact fault of the unit, the mechanism of rub-impact vibration fault of the unit is analyzed by dividing the unit in different stages of operation. To find out the characteristics of rub-impact vibration fault of units in different operation stages, and to put forward detailed monitoring parameters and monitoring methods for dynamic and static rub-impact fault monitoring of generating units. The characteristics of rub-impact fault reflected in later data processing are summarized. In the aspect of rub-impact fault treatment, the rub-impact fault caused by different stages and different fault causes of unit is classified and sorted out. It has a high reference value for dealing with rub-impact faults in practical units. In the aspect of dynamic and static rub-impact fault diagnosis, By summing up the fault symptoms and the causes of the faults, the FMEA and the FTAs of the rub-impact fault of the unit are worked out, and the diagnosis flowchart of the rub-impact fault of the unit is worked out by the method of combining them. Finally, the vibration fault of the 350MW unit on the spot is analyzed. The diagnosis method and treatment measures proposed in this paper are adopted. The rubbing fault of bearing and journal of the unit is accurately diagnosed and solved, and the feasibility of the practical application of the diagnostic method proposed in this paper is verified.
【学位授予单位】：华北电力大学（北京）
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TM311;TH165.3

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