基于负压方式的某水电机组轴承座防漏油研究与实践

Research on the Oil Leakage Prevention of the Generator Bearing Pedestal Based on the Negative Pressure Mode

水轮发电机组轴承座漏油、甩油问题已成为机组运维检修亟需突破的瓶颈之一。为保证水电站机组经济、安全运行以及运检人员人身安全,以湖北某水电站2台3.2 MW卧式三支点水轮发电机组轴承座漏油事件为例展开研究。首先对其漏油原因进行了分析;其次,针对现有密封防漏油方法的困境,提出了一种基于负压方式的轴承座防漏油方法;然后,设计研发了与所提方法配套的软硬件相结合的负压抽真空智能调控装置;最后将该装置应用于水电站现场,成功解决其漏油问题。

The problem of oil leakage and oil rejection of hydro-generator unit bearing pedestal has become one of the bottlenecks that need to be broken through in unit operation and maintenance.In order to ensure the economy and security of generator unit operation in hydropow⁃er stations and the personal security of operation and maintenance personnel,the oil leakage of bearing pedestal of two 3.2 MW horizontal three fulcrum hydro-generator units in a hydropower station in Hubei Province is studied as an example.Firstly,the causes of oil leakage are analyzed.Secondly,aiming at the dilemma of the existing sealing oil leakage prevention methods,this paper proposes a bearing pedestal oil leakage prevention method based on negative pressure.Then,the intelligent control device of negative pressure vacuum pumping com⁃bined with the software and hardware corresponding to proposed method is developed.Finally,the developed device is applied to the hydro⁃power station,and it succeeds in solving the oil leakage problem.