论文标题:大型混流式水轮机零部件—蜗壳座环的刚强度分析
The Strength and Rigidity Analysis of Large Capacity Francis Turbine Parts-Spiral Case and Stay Ring
论文作者
论文导师 林文强,论文学位 硕士,论文专业 化工过程机械
论文单位 东北大学,点击次数 134,论文页数 88页File Size5605K
2005-11-01论文网 http://www.lw23.com/lunwen_97973462/
spiral case; stay ring; variational analysis; strength; concrete; rigidity
随着水电机组的容量的提高，大型水电机组的结构尺寸也越来越大，部件的重量也越来越重。要保证机组稳定运行，零部件的刚度和强度显得尤为重要。 本文是以大型有限元分析软件I-DEAS为计算工具，在哈尔滨大电机研究所的研究课题-云南景洪水电站水轮机零部件的计算和优化基础之上，主要对水轮机零部件-蜗壳座环刚强度进行了分析，主要做了以下方面的工作： 1．利用目前国内外水电行业的企业对蜗壳座环分析采用的分析方法，在不考虑联合受力情况下，对蜗壳座环进行了刚强度有限元分析。根据有限元分析结果，找到了蜗壳座环应力和位移的情况。 2．介绍了变量化分析技术。包括变量化技术的理论基础、变量化技分析的优点以及变量化分析与传统的有限元分析的对比。最后以一个实例——某零件的变量化分析详细的介绍了变量化分析的使用和在实际工程中的应用。 3．蜗壳座环强度的变量化分析。利用变量化分析技术，针对蜗壳座环的强度进行了变量化分析，分别进行了以材料厚度和结构尺寸两种参数为变量的蜗壳座环强度的变量化分析，找到了影响蜗壳座环强度的材料厚度参数以及结构尺寸参数。 4．蜗壳座环联合受力情况的刚强度情况。针对蜗壳座环和钢筋混凝土联合受力在实际工程中的两种情况：蜗壳座环打压浇注混凝土和蜗壳座环与混凝土之间铺设弹性层，进行了蜗壳座环的刚强度分析，并把计算结果与不考虑联合受力时的分析结果进行了对比，总结刚强度变化情况。此外，针对在蜗壳座环与钢筋混凝土之间铺设弹性层的联合受力情况，还进行了当弹性层弹性模量、厚度不同时，蜗壳座环刚强度的变化情况进行了分析，找到了弹性层物理参数对蜗壳座环刚强度的影响规律。
The structural size of the hydro-generating unit becomes larger and larger; The strength and rigidity of the parts becomes important to the operation of the machine.Using the large FEA software-IDEAS, this thesis mainly researches on the analysis of Spiral case stay ring in YunNanJingHong hydro-generating unit, which is the ongoing study in institute of HarBin generator. The main conclusions are shown in the following:1. The traditional FEA of spiral case and stay ring under the condition of without concerning concrete. Finally the stress and displacement of the spiral case and stay ring without concerning the concrete are calculated.2. Introduction of variational analysis technology. This includes the basal theories of variational analysis, the virtues of variational analysis, the use of variational analysis and the comporation between traditional FEA and variational analysis. Finally the thesis illustrates the use of variational analysis with a actual case.3. The variational analysis of spiral case and stay ring"s strength. Not only the thickness parameters of spiral case and stay ring but also the structural parameters are used for variational analysis. Finally the parameters which influence the strength of the structure highly are enquired.4. The strength and rigidity analysis of the spiral case and stay ring concerning the concrete. This chapter presents the two usual conditions: spring layer between spiral case and stay ring and concrete, hollow gap between spiral case and stay ring and concrete. These two conditions are both calculated. Moreover how the strength of spiral case and stay ring changes when the physical parameter changes is also calculated.
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