摘要
引入Fang接触模型对人字闸门底枢摩擦副进行建模分析,计算了人字闸门底枢摩擦副的接触区域大小、接触应力,研究了外载荷、底枢半径、接触间隙及配对副材料等参数对接触特性的影响.结果表明,外载荷与底枢半径对底枢摩擦副的接触特性有较大的影响.在相同的底枢半径及接触间隙条件下,随着外载荷增加,接触面积减小,接触区域越集中,相应的接触应力越高.随着底枢半径的增大,接触面积也增大,接触区域分散,相应的接触应力减少.并且在极端重载情况下,底枢半径对接触应力存在更大的影响.接触面积与接触间隙之间存在负相关关系,最大接触应力与其存在正相关关系.最大接触应力与底枢配对副材料的杨氏模量之间存在一个正相关关系,从减少摩擦磨损的角度,选择表面硬度高而韧性良好的材料作为配对副材料将改善底枢的耐磨性,从而有效地降低接触应力.
The Fang contact model is introduced to model and analyze the bottom friction of the miter gate bottom hinge.The contact area and contact stress of the bottom friction pair of the gate are calculated.The effects of parameters such as external load,radius of bottom hinge,contact gap and paired materials on contact characteristics are studied.The results show that the external load and the radius of bottom hinge have a great impact on the contact characteristics of the bottom hinge.As the external load increases,the contact area decreases,and the more concentrated the contact area is,the higher the corresponding contact stress is.Under the same bottom pivot radius and contact gap condition,the contact area increases with the increase of the radius of the bottom hinge and the contact stress reduces corresponding with the decrease of contact area.And under heavy load conditions,the bottom pivot radius has a greater impact on the contact stress.There is a negative correlation between the contact area and the contact gap,and the maximum contact stress is positively correlated with it.There is a positive correlation between the maximum contact stress and the Young's modulus of the bottom pivot pairing material.From the perspective of reducing friction and wear,selecting a material with high surface hardness and good toughness as the pairing material will improve the wear resistance of the bottom pivot,thus the contact stress can be effectively reduced.
作者
赵新泽
周紫嫣
赵美云
ZHAO Xinze;ZHOU Ziyan;ZHAO Meiyun(Hubei Key Laboratory of Hydroelectric Machinery Design&Maintenance,China Three Gorges Univ.,Yichang 443002,China;College of Mechanical&Power Engineering,China Three Gorges Univ.,Yichang 443002,China)
出处
《三峡大学学报（自然科学版）》
CAS
北大核心
2020年第3期100-105,共6页
Journal of China Three Gorges University：Natural Sciences
基金
湖北省技术创新专项重大项目(2016AAA076)
高端轴承摩擦学技术与应用国家地方联合工程实验室开放基金(201811)。
关键词
人字闸门底枢
接触特性
Fang接触模型
摩擦
miter gate bottom hinge
contact characteristics
Fang contact model
friction
