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Study on Structural Characteristics of the Spiral Case of Hydropower Station Standing with High-head Water Pressure

Author: YangHuaBin
Tutor: WuHeGaoï¼›HuangHe
School: Wuhan University
Course: Water Resources and Hydropower Engineering
Keywords: Hydropower Station Volute Structural optimization Vibration Finite element method
CLC: TV33
Type: Master's thesis
Year: 2004
Downloads: 141
Quote: 1
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Abstract


Liu Hung hydropower cascade development in the River Main Meigu fifth grade power plants, high head diversion power plant . Factory installed three Francis turbine generator units with a total installed capacity of 180MW . The volute inlet section diameter 1.3m, volute material using 16Mn, a thickness of about 38mm . The plant volute , although small in size , but to withstand high internal water pressure , as an important component part of the volute turbine generator set and its peripheral reinforced concrete structure , face many new technical issues , such as the turbine under demolition maintenance mode and so on. Therefore, how to design the volute structure , related to the power plant long-term stable and secure functioning . Engineering analogy and taking into account the requirements of the stable operation , the Liu Hung Spiralcase , has decided to the preloading filling pouring concrete structure type . In order to optimize the volute holding pressure value and the concrete structure surrounding the reinforcement , the paper mainly carried out a study of the following : (1) the domestic and international engineering turbine volute type , especially the use of water-filled pressurized pouring concrete volute process pressure value in spending , construction and technical and economic progress to investigate the situation to be analyzed to provide a basis for the the Liu Hong Spiralcase the structural design ; (2) the spiral case keeping constant pressure value preferred , the use of three-dimensional finite element method volute and the surrounding concrete calculations, a comprehensive comparison of the operating performance of the unit , the stress state of the surrounding concrete , deformation law and reinforced configuration , and ultimately preferably water-filled pressure values ??; (3) the volute and peripheral concrete running of temperature loads of stress and deformation calculations, analyze the impact of temperature load . (4) keeping constant internal pressure according to the selected value , the volute and peripheral reinforced concrete nonlinear analysis, the development of peripheral cracks in concrete , volute and reinforced the stress distribution , determine a reasonable concrete reinforcement parameters ; ( 5) Calculate the natural frequency of the volute during the run , and a preliminary analysis of the vibration characteristics of the volute .

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CLC: > Industrial Technology > Hydraulic Engineering > Hydraulic structures > Concrete and reinforced concrete structures
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