双向钢闸门反向挡水启门力CFD分析与减载对策  

CFD analysis of reverse water retaining lifting force of two-way plane steel gate and load reduction countermeasures

作　　者：孙涛 仇宝云 黄先北 周晨露 倪春 于贤磊 荐威 雍成林 SUN Tao;QIU Baoyun;HUANG Xianbei;ZHOU Chenlu;NI Chun;YU Xianlei;JIAN Wei;YONG Chenglin(The East Route of South-to-North Water Diversion Project Jiangsu Water Source Co.Ltd.,Nanjing,Jiangsu 210000,China;College of Electrical,Energy and Power Engineering,Yangzhou University,Yangzhou,Jiangsu 225127,China)

机构地区：[1]南水北调东线江苏水源有限责任公司,江苏南京210000 [2]扬州大学电气与能源动力工程学院,江苏扬州225127

出　　处：《排灌机械工程学报》2021年第9期904-909,共6页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(51679208,51909291);江苏省水利科技项目(2019019,2019017)。

摘　　要：为解决工程中发生垂直提升式双向挡水钢闸门反向挡水时,启门力过大,常规选用的启闭机启门力不足等问题,以江苏省某闸站的节制闸为研究对象,对反向挡水启门过程中的闸门进行受力分析,采用CFD方法计算闸门不同开高时的过流流场和水流对闸门的作用力,计算启门力,并实测验证,分析启门力影响因素和增大的原因,提出采用增大横梁排水孔面积的方法减小启门力,采用ANSYS Workbench对排水孔加大后的闸门横梁强度进行校核.结果表明:启门过程中,下泄水流冲击闸门底部主梁上表面,造成上下表面压力差,是启门力增加的主要原因;增大排水孔面积,启门力呈线性规律下降,同时,由于水流对闸门水平作用力减小,主梁最大应力减小,强度能够保证.当排水孔面积增大到原面积8倍时,启门力下降7.6%~11.9%,效果显著.成果对于改进双向挡水闸门设计、减小启门力、保障启门安全具有重要意义.To solve the problems of excessive lifting force and insufficient lifting force of the conventio-nal hoist when the vertical lifting two-way steel gate is used for reverse water retaining,taking the control gate of a sluice station in Jiangsu Province as the research object,the force analysis of the gate during the opening process of reverse water retaining was carried out,and the CFD method was used to calculate the flow field and the forces of water flow on the gate at different opening height.The gate lif-ting forces were calculated,and were verified by the actual measurement results.The influencing factors of the gate lifting force and the reasons for its increase were analyzed,and the method of increasing the area of the drainage holes on the gate bottom beam to reduce the door lifting force was proposed.ANSYS Workbench was used to check the strength of the gate beam after the drainage hole area was increased.The results show that during the door opening process,the downward flow impacts the upper surface of the main beam at the bottom of the gate,resulting in the pressure difference between the upper and lower surfaces,which is the main reason for the increase of the gate lifting force.The gate lifting force decreases approximately linearly with the increase of the area of the drainage holes,at the same time,the maximum stress of the main beam decreases and the strength can be guaranteed because of the decrease of the horizontal force of the water flow on the gate.When the area of the drai-nage holes increases to 8 times the original area,the gate lifting force decreases by 7.6%-11.9%,and the effect is significant.The results of this article are of great significance for improving the design of the two-way water sluice gate,reducing the gate lifting force,and ensuring the safety of the lifting gate.

关 键 词：双向挡水平面钢闸门 反向挡水 启门力 排水孔 

分 类 号：S277.9[农业科学—农业水土工程]