液压闸门增力式举升机构优化及有限元分析  

Optimization and finite element analysis of booster lifting mechanism for hydraulic gate

作　　者：李凯旋 耿晔晗 窦立玮[1] 王湛[1] 闫永生 LI Kaixuan;GENG Yehan;DOU Liwei;WANG Zhan;YAN Yongsheng(China Institute of Water Resources and Hydropower Research,Beijing 100048,China)

机构地区：[1]中国水利水电科学研究院,北京100048

出　　处：《中国水利水电科学研究院学报（中英文）》2022年第1期30-38,共9页Journal of China Institute of Water Resources and Hydropower Research

基　　金：五大人才-高端国际复合型人才(外0203952012)。

摘　　要：为了研究液压闸门增力式举升机构在闸体升降过程中的安全稳定性及其适用条件,将增力式举升机构与直推式举升机构进行对比,改变约束条件,揭示液压缸缸径、行程、稳定安全系数间的变化规律及关系,确定其安全性及适用条件;创建增力式举升机构三维有限元模型,开展静力学仿真分析计算其在闸门不同启闭角度下的应力、应变、变形情况。结果表明:该举升机构在升降过程中,液压缸受力随着启闭角度先增大而后减小,在起推和立闸时,液压缸受力极小,对于长期需要立闸挡水的闸门,对液压缸损耗较小,可以有效延长闸门的使用寿命;且随着拦蓄高度的增加,液压缸稳定安全系数越大,更适用于4~8 m以上的较高拦蓄高度;该结构在升降过程中应力水平均不超过材料的抗拉强度,关键结构局部应力集中处应力水平数值较大,可高达358.2 MPa,小幅度超过了材料屈服强度;闸门整体及门叶应变最大值为2.66×10^(-3)mm/mm;变形量最大值为26.511 mm。文中提出需要改进的部件及改进措施,为液压闸门增力式举升机构在较高拦蓄高度下的设计、改进和应用提供理论依据。In order to study the safety,stability and its applicable condition of booster lifting mechanism for hydraulic gate,this paper firstly compared booster lifting mechanism with the direct pushing lifting mech⁃anism.The constraint conditions are changed to reveal the change rules and relations among the diameter,stroke and stability coefficient of the hydraulic cylinder,so as to determine its safety and applicable condi⁃tions.Secondly,it established a three-dimensional finite element model of the booster lifting mechanism to carry out a statics simulation analysis and calculation on the variation rules of stress,strain and overall de⁃formation under different opening and closing angles of the gate.The results show that the force on the hy⁃draulic cylinder increases first and then decreases with the different angles of gate opening and closing dur⁃ing the lifting process of the booster structure.And the force on hydraulic cylinder is very small when the gate is pushed up and set up for a long time,which means the small wear on the hydraulic cylinder so that it effectively extends the service life.Meanwhile,with the increase of the retaining height,the stability coefficient of the hydraulic cylinder is greater.It is more suitable for the higher retaining height of 4~8m.In the process of lifting and dropping,the stress level of the structure does not exceed the tensile strength of the material.The stress level at the partial stress concentration of the key structures is large,which can be as high as 358.2MPa,slightly exceeding the yield strength of the material.The maximum strain of the whole gate and gate blade is 2.66×10^(-3)mm/mm.The maximum deformation is 26.511mm.In this paper,tar⁃geted components and improvement measures are proposed.It provides a theoretical basis for the design,im⁃provement and application of hydraulic gate booster lifting mechanism at higher storage height.

关 键 词：液压闸门 举升机构 稳定安全系数 有限元法 拦蓄高度 

分 类 号：TV663[水利工程—水利水电工程]