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鉴于当前水电站球阀液压系统设计仍沿用国外设计,凭经验修改,缺乏科学依据,设计冗余度较大,针对球阀液压系统各元件建立数值计算模型库,并结合液压元件动力特性试验数据确定各模型参数。根据水电站球阀液压控制系统实际工作过程及要求建立数值计算模型,获得球阀典型工作过程中液压系统各元件及节点参数的动态变化过程,在此基础上分析管道长度对系统动态特性的影响。结果表明,该建模及计算方法可为水电站球阀液压控制系统的精确设计和元件参数的合理选取提供理论依据。
In view of the current hydropower station ball valve hydraulic system design is still used in foreign design, modified by experience, the lack of scientific basis, the design redundancy is larger, for the ball valve hydraulic system components to establish a numerical model library, combined with hydraulic components dynamic test data to determine the model parameter. According to the actual working process and requirements of the hydropower station ball valve hydraulic control system, a numerical calculation model is established to obtain the dynamic process of the components and nodes of the hydraulic system during the typical working process of the valve. On this basis, the influence of the pipeline length on the system dynamic characteristics is analyzed. The results show that this modeling and calculation method can provide a theoretical basis for the precise design of hydraulic control system of ball valve of hydropower station and the reasonable selection of component parameters.