三峡升船机下闸首工作门止水性能优化

Sealing performance optimization of lower head work gate for Three Gorges ship lift

针对三峡升船机下闸首工作门充压止水破损漏气导致封水效果不佳的问题,采用有限元分析软件ABAQUS建立充压止水有限元模型,分析在增加充压止水翼头高度时不同止水橡胶材料对充压止水封头自由外伸量、背腔密闭性、封头水密性、封头偏移量、止水摩阻力的影响。结果表明,充压止水封头的接触应力、正应力和最大偏移量均随着橡胶材料的硬度降低而减小;挡水水头越低,材料硬度的敏感程度越高;接触应力和正压力均随着翼头高度的增加而增大。最后提出通过优化充压止水橡胶材料的方法来改善充压止水封水效果和服役寿命。

Aiming at the problem of poor sealing effect caused by the damage and leakage of the pressurized water seal of the lower head work gate for Three Gorges ship lift,this paper establishes the model of pressurized water seal using the finite element analysis software ABAQUS,and analyzes the influence of different sealing rubber materials on the free extension of seal head,tightness of back cavity,water tightness of seal head,head offset and friction resistance of seal head when the height of seal head is increased.The results show that the contact stress,normal stress and maximum offset of the pressurized water seal head all decrease with the decrease of the hardness of the rubber material.The lower the water head,the higher the sensitivity of the material hardness.Both the contact stress and normal pressure increase with the increase of the height of the wing head.Finally,the method of optimizing the pressurized seal rubber material is proposed to improve the effect and service life of pressurized water seal.