Static And Dynamic Analysis On Flow Deflector In Spiral Case Of The Hydropower Generator Units

Whether the hydropower generator units can be running safely and stably is the safeguard of a long-term safety operation. Many running hydropower generator units have occurred the phenomenon of rather exquisite mechanical vibration; individual unit has appeared biggish yawp. The phenomenon of avulsion in flow deflector in spiral case also brought hidden trouble, the familiar settle measure at present is repaired and added weld strengthen ribbed.In this article, the work was based on the finite element analysis for the statics and the transient dynamic of the flow deflector in spiral case of the hydropower generator unit. The research is focused on comparing the change of the displacementand the stresses in the flow deflector in spiral case about added weld strengthen muscle former and back. Check up whether it can enhance it's resist avulsion ability, provided reference idea and science gist for the vibration research and optimize run about the hydropower generator units.The outline of this article is as follows:1,Establish the models of the flow deflector in spiral case of hydropower generator units added weld strengthen muscle former and back by ANSYS, and adding proper boundary conditions according to the actual case.2,Using APDL language programme, basising on the insert calculate,conversion the knowed load date into the load on model, and then add it to model.3,Accomplished static analysis of the model which added weld strengthen muscle former and back,examine the transmutation and the stress partly, analysis and compare the result.4,According to the date gained in the running hydropower generator units,simulate the loade effect on the model and do the dynamic analysis for it,get the dynamical response characteristic,analysis and compare it.The flow deflector in spiral case of the Sanxia hydropower generator units is analyzed. The results can provide reference idea and science gist for the vibration research and resist avulsion analysis about the flow deflector in spiral case of the hydropower generator units. Furthermore, the data processing idea and calculate method in load conversion can use for reference in other programme calculate and structure analysis.