Analysis and Treatment of Low Elevation Problem of Mixed-flow Hydro-turbine Runner
The installation elevation of each component in a hydro-turbine generator unit,as well as the relative positions of the rotating and fixed components,must be consistent with the design values,which is the fundamental guarantee for the safe,stable,efficient and economical operation of the unit.The elevation of the hydro-turbine runner in the No.4 u-nit in Bajiaohe Hydropower Plant is 7.2 mm lower than the design value,which is rare in the industry.During the ex-panded maintenance,a large amount of data was collected and compared with the actual measurements.The causes of the problem were analyzed and determined.Then,the optimal treatment scheme was developed and conducted.With the treatment,the vibration and the water consumption economy of the unit during operation were significantly improved.It can be useful reference for the treatment of similar problems.
NETL
NSTL
万方数据
