Finite Element Analysis Of Hydraulic Turbine-generator Unit Key Components Based On ANSYS

Hydropower is a clean pollution-free，reserves is extremely rich in renewableenergy，hydropower is the most important form of use of natural renewable energy.Wind power development relatively late in our country，the technology is relativelybackward，and combined with the current hydroelectric power has been high cost，restricted the hydropower development in China.On the one hand is due to the designof hydraulic generator set system level is not high， on the other hand becausehydroelectric power for small units，power generation efficiency is low. And how tomake large-scale turbine units，improve the efficiency of power generation has becomethe domestic and foreign experts have been for the efforts of the key problems.In this paper the finite element analysis of key components of hydroelectricgenerating set，the premise condition to ensure the safe operation of the unit，thehydraulic generator set for large-scale mentioned the strong support，have positivesignificance to improve the efficiency of power generation.The main work summarizedas follows.First， broad access to domestic and foreign related literature，understanding hydroelectric development situation and the latest results， the finiteelement analysis of hydro-generator units were summarized，and simply introduces thestructure and function of the ANSYS software.Secondly，detailed elaborated the twodifferent types of hydroelectric generating set，particularly in view of the verticalhydro-generator units on the frame structure characteristics are described in detail，introduces its main parameters，and frame the total load on the load and a single armforce analysis，secondly in horizontal units， part of the main parameters，key partsstructure characteristics of the rotor and the stress of the rotor. For subsequent chaptersof the realization of the simulation study provides the most basic theoretical support，to ensure the validity of the subsequent simulation in the process of applying loadvalues.Thirdly，In view of the characteristic of enduring high load of Hydro-generatorupper bracket，this paper use shell elements of ANSYS for finite element stiffnessanalysis of upper bracket in order to guarantee the safety of the operation. In analysisprocess，the stress characteristics of the overall and local are fully simulated andembodied， the vertical direction and radial stiffness are calculated， and thecomputational accuracy is higher.The results show that this structure reaches thedesign requirements.Compared with the traditional calculation method，this method improves work efficiency and saves time，its precision can more satisfy engineeringdemand.Finally，According to a horizontal hydraulic turbine-generator unit exported toVietnam， this paper briefly introduces the overall size and structure characteristics ofthe rotor part. The unit single capacity is large (rated power of6750kW， rated speedof1000r/min).The methods of establishing Pro/E model and analyzing finite elementare presented through the example of stress analysis of generator rotor cross sectionunder condition of rated and runaway speed，and computed results are analyzed andsummarized.In analysis process， the Pro/E modeling integrating with ANSYSsimulation are realized，model establishment and finite element analysis are finishedby the software. The results show that the structures of main shaft and magnetic polesreach the design requirements. Compared with the traditional calculation method，itsprecision can more satisfy engineering demand，and the efficiency is high. This methodcan provide guidance for the related product design.