Reliability Analysis of Turbine Generator Units Spindle System with Vibration Fault Tree

With the rising of single-machine capacity ,the structure of turbine generator units has become increasingly complex, and mechanical failure problem has been rapidly concerned among engineers. This paper develops a fault tree in vibration for turbine generator units by analyzing failure cause, which regard rotatable part as a group. In this study, the feature of failure is summarized to realize the whole system, and an example is examined at the end of paper. Through the qualitative and quantitative analysis shows that, the failures of turbine generator units are complicated and correlative, the vibration of rotatable parts is the most important factor affecting the stable of turbine generator units, and system reliability is associate with the structure of fault tree and the probability of basic events .