一种气垫式调压室防漏新方法

发布时间：2018-10-29 10:50

【摘要】：气垫式调压室具有良好的水击波反射功能,能有效降低水电站负荷急剧变化时压力管道的水击压力,但运行过程中的漏气现象制约了气垫式调压室的推广应用。提出了一种防止气垫式调压室漏气的新方法,即在传统气垫式调压室内放置橡胶芯袋作为盛气装置,实现调压室盛气和结构承载功能的分离,利用橡胶材料柔软、弹性模量小、密封性好等特点,从根本上解决了盛气密封薄壳容易开裂渗漏的问题。根据力学平衡原理、材料的应力应变关系和调压室结构的变形协调条件,结合流体力学理论和调压室内水位波动的变化规律,构建了橡胶芯袋变形与受力本构关系,并分别推导出了单个、多个橡胶芯袋预灌气压的计算式,为调压室结构设计与工程控制提供了理论依据。
[Abstract]:The air cushion surge chamber has a good reflection function of water hammer wave, which can effectively reduce the water hammer pressure of the pressure pipeline when the load of hydropower station changes sharply. However, the air leakage in the operation process restricts the popularization and application of the air cushion surge chamber. A new method to prevent air leakage from air cushion surge chamber is put forward, that is, the rubber core bag is placed in the traditional air cushion surge chamber as the gas holding device, which realizes the separation of the gas holding function of the pressure regulating chamber and the bearing function of the structure. The rubber material is used to soften and the elastic modulus is small. Because of its good sealing ability, the thin shell of gas seal is easy to crack and leak. According to the principle of mechanical balance, the stress-strain relation of materials and the deformation coordination condition of the pressure regulating chamber structure, combined with the theory of fluid mechanics and the variation law of water level fluctuation in the pressure regulating chamber, the constitutive relation between deformation and force of rubber core bag was constructed. The formula of prepouring air pressure for single and multiple rubber core bags is deduced respectively, which provides a theoretical basis for the structural design and engineering control of the surge chamber.
【作者单位】：重庆交通大学国家内河航道整治工程技术研究中心;重庆交通大学水利水运工程教育部重点实验室;湖南省交通规划勘察设计院;
【基金】：国家自然科学基金资助项目(51509027)
【分类号】：TV732.56

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