新型自由侧翻式拍门研究

结合传统拍门的研究方法,从理论上分析和研究了一种新型拍门即自由侧翻式拍门的运动规律和撞击力。主要内容包括:拍门的结构和工作原理、无水空翻时拍门的运动规律和撞击力、停泵闭门过程中拍门的运动规律和撞击力、拍门撞击力的求解方法、拍门的流态和水力损失分析等,得出一般拍门的运动方程和撞击力近似表达式,并结合百里洲泵站更新改造工程拍门改造实例进行计算。结果表明该新型拍门克服了传统拍门的缺陷,运行时阻力小、开启角度大、水流流态好,无需配套设备,造价低廉,安装与检修方便。

Study on new type of laissez-aller side-turn-over flap gate

Based on the research method for conventional flap gates,a new type of flap gate,the laissez-aller side-turn-over flap gate,was studied.Theoretical analysis was carried out on the structure and working principle of the flap gate,the motion law and impact force of the flap gate under different conditions,the method to solve the impact force,the flow pattern and hydraulic loss,etc..The motion equation for the common flap gate and an approximate formula for the impact force were obtained.Case study on the flap gate reform in rebuilding of Bailizhou Pumping Station shows that the new type of flap gate overcomes the defects of conventional ones,and it is characterized by small resistance,large open angle,good flow pattern,no requirement for auxiliary facility,low cost,and convenience in installation and repairing.