大负载不压井作业机液压卡瓦结构的优化设计  

Structure Design of Hydraulic Slip of Heavy-Duty Snubbing Unit

作　　者：马卫国[1] 沈如芳 赵国强 王炜 Ma Weiguo;Shen Rufang;Zhao Guoqiang;Wang Wei(School of Mechanical Engineering,Yangtze University;SJ Petroleum Machinery Co.,SINOPEC)

机构地区：[1]长江大学机械工程学院,湖北省荆州市434023 [2]中石化四机石油机械有限公司

出　　处：《石油机械》2020年第8期69-76,共8页China Petroleum Machinery

基　　金：“十三五”国家科技重大专项“大型油气田及煤层气开发”之子课题“深层页岩气带压作业装备研制”(2016ZX05038-003)。

摘　　要：针对不压井作业机液压卡瓦存在的大负载下局部失效的问题,采用试验与仿真相结合的方法对卡瓦的开槽宽度、开槽位置和齿顶宽度3个结构参数进行了研究,提出了将有限元分析法、正交试验法、线性加权法和Matlabs优化工具箱相结合的液压卡瓦结构优化设计方法。研究结果表明:液压卡瓦的薄弱部位为卡瓦齿,卡瓦齿在周向和轴向存在应力分布不均的问题;卡瓦齿周向的Mises应力基本呈现左右对称的趋势,卡瓦齿轴向的Mises应力呈现上下较大、中间较小的马鞍形;优化设计的卡瓦牙板开槽宽度为5 mm、齿顶宽为0.23 mm、开槽平面与左右端面角为21.67°。研究结果对液压卡瓦应力分布的改善以及夹持能力的提高有重要意义。To address the partial failure problem of hydraulic slip of snubbing unit under high load,the three structural parameters of slot width,slot position and tooth crest width of slip were studied by the method of test and simulation.The hydraulic slip structure design method of combining the finite element analysis method,orthogonal test method,linear weighting method and Matlabs optimization toolbox was proposed.The results show that the weak parts of hydraulic slip are slip teeth,which have uneven distribution of stress in the circumferential direction and the axial direction.Mises stress in the circumferential direction of slip basically shows a symmetrical trend.Mises stress in the axial direction presents a saddle shape that larger values are at both ends and smaller value is in the middle.The analysis shows that the optimized slip structure has the slot width of 5 mm,the tooth crest width of 0.23 mm,and the angle between the slot plane and the left and right end faces of 21.67°.The study results are of great significance to the improvement of the stress distribution of hydraulic slips and the improvement of clamping capacity.

关 键 词：液压卡瓦 局部失效 线性加权法 优化工具箱 数值模拟 优化设计 

分 类 号：TE935[石油与天然气工程—石油机械设备]