Analysis And Study Of Hydraulic Turbine Steady Water Gate Damage The Cause And Countermeasures

In this paper, Sichuan Dongfang Electrical Machinery to asbestos, gold nest Pelton turbine power plant of Yaan design the stability of water-gate in the unit to run less than six months, it was discharged from the wheel steady and disrupting the flow of water gate and the chassis has been welded root Chong fracture to explore the causes of the problem.The article an overview of impulse turbine, working principle, performance analysis and parameter selection, and the unit during operation will be cavitation damage, sand abrasion damage and vibration damage to explore the stability of water-gate was damaged reasons.Affect the normal operation of hydraulic turbine through the main reason for the analysis of the finalization of the water gate and the chassis stable welding root fracture due to the destruction of the mechanical characteristics of water, for which the establishment of a mechanical model were discussed. Dependable water-gate by the impact of water flow as the simply supported beam, using the energy equation of fluid mechanics and physics of the momentum theorem, proved stable from a mechanical water gate and the chassis welding the root causes of root fracture. According to its causes have been refined and improved to normal operation when the unit is not the purpose of destruction.Articles from the turbine welding characteristics and welding structure for analysis. Welding is widely used in turbine manufacturing, and quite mature, and even the runner is through such an important component made of welded polished. As the steady destruction of the water-gate was the impact of the steady flow of water gate and the chassis welding the root, therefore, this paper only to investigate the weld root. As the unit is running in the process of the vibration unit, the article that the dependable water-gate and enclosure separated from the water gate in the original stable welding a steel bar on each side, starting with orientation and reduce the friction. To the improved stability of water-gate on the paper said the improved hydraulic structures.This is conducive to the protection of the chassis, and stabilize the water-gate and hydraulic structures.At last the key to solving the problem give an extension right after the turbine design and other hydroelectric turbine running engineering problems arising in the process has been solved now played a role in learning.