水轮机磨蚀问题（Abrasion problem of hydraulic turbine）.docVIP

水轮机磨蚀问题（Abrasion problem of hydraulic turbine） There are two basic types of small hydropower stations in Hebei Province: power station power station and canal on a building to the original water conservancy projects supporting the dam; the second is the river diversion type power station. The first kind of power station has good water quality and clear water flow. The second types of diversion hydropower stations have the problems of poor water quality, large amounts of debris and large sediment content. In recent years, with the deterioration of the ecological environment, the aggravation of soil erosion and the insufficient consideration of sediment erosion in the early stage of construction, the problem of sediment erosion of water diversion turbines has become more and more serious. This serious problem is in front of us. 1 abrasion status of diversion hydropower station in Hebei Province 1.1 diversion type power station distribution Hebei province water conservancy system for single 500kW and more than 51 power stations, hydroelectric generating units total units 130 units, installed 161.862MW, 20.844GWh power generation in 2000, of which the river diversion type power station 26, accounting for 50.9% of the total number, hydroelectric generating units 70 units, accounting for 53.8%, the total installed capacity of 60.202MW, accounting for 37%, electricity production in 2000 accounted for 114.80GWh 55%. Located in Zhanghe, Tanghe, Shahe, Hutuohe, Juma River, Chaobai River, Luanhe River and major tributaries. These plants are located in Hebei province river sediment carried serious rivers, such as Zhanghe long-term average sediment transport capacity of 25 million 800 thousand tons, Tanghe average annual sediment load of 1 million 800 thousand tons, the river hydropower station without exception, there are problems of abrasion of turbine. With the acceleration of the construction of small hydropower stations, the proportion of diversion hydropower stations in 50