Research on Abrasion Protection Technology of Hydroturbine Components in Gongzui Hydropower Station

Abstract The volute and fixed guide vane of Gongzui hydropower station have been used for more than 50 years, and the wear and corrosion of them are serious. Polyurethane mortar is a new kind of anti-abrasion material, which has high bonding strength with the base surface. The elastic polyurethane material greatly improves the anti-cavitation performance of the coating, so that the coating can resist sand wear and hydraulic cavitation. The field test of fixed guide vane, seat ring and volute anti-abrasion of No. 1 unit of Gongzui hydropower station was carried out by Yellow River Institute of Hydraulic Research, YRCC, and combined with the characteristics of Dadu river with high sediment content, the material ratio was optimized, and the construction technology was improved, so as to explore the hydroturbine anti-abrasion technology suitable for the characteristics of sediment and abrasion and cavitation damage. After the success of this technology, it can be used as a demonstration for hydropower stations in Dadu river basin to comprehensively improve the anti-abrasion ability of flow parts and the level of safe production and operation.