顶驱下套管用卡瓦板承载能力分析及卡瓦牙结构优化  

The Slip Bearing Capacity Analysis and Slip's Tooth Structure Optimization of Top Drive Casing Running

作　　者：蒋发光[1,2] 谢帅[1] 闫永宏[3] 王攀[3] 

机构地区：[1]西南石油大学机电工程学院,四川成都610500 [2]西南石油大学石油天然气装备教育部重点实验室,四川成都610500 [3]宝鸡石油机械有限责任公司,陕西宝鸡721002

出　　处：《机械设计与制造》2017年第4期202-205,共4页Machinery Design & Manufacture

基　　金：西南石油大学机电工程学院研究生创新基金(CX2014SY30);四川省教育厅科技项目(13ZB0192)

摘　　要：针对顶驱下套管用卡瓦牙板承受较高拉扭载荷后出现夹持不稳、牙齿磨损与齿尖断裂等问题,基于薄壳弯矩理论,考虑卡瓦板工作时承受的轴向力、径向力、扭矩,建立了卡瓦板的承载能力力学模型;基于响应曲面法,建立了卡瓦牙尺寸优化数学模型,并对优化数学模型进了方差分析。结果表明,卡瓦板长度大于200mm时,扭矩对卡瓦板承载能力的影响逐渐变大,扭矩对承载能力的影响不能忽略;所建卡瓦板承载能力力学模型取1.15倍安全系数后可应用于工程实践;方差分析证实了卡瓦牙数学模型的合理性,并得出了卡瓦牙最优结构参数,使卡瓦牙应力减小了17%。As for the problems of grip instability, tooth abrasion, tooth tip fracture and others occur in top drive casing after slip bearing more tensile, torsion load and based on the theory of thin shell flexural theory, considering slip works under bearing axial force, radial force and torsion, build the mechanic model of bearing capacity. And based on response surface method（RSM）, build slip size optimization mathematical model and have an analysis of variance （ANOVA）on mathematical model Results turn out： when the length of slip is more than 200ram, the effect of moment of torque on slip bearing capacity increases gradually and the effect cannot be ignored; if the slip bearing capacity of mechanics model having been built takes 1.15 times safety factor, it can be applied into engineering practice ; the analysis of variance verifies the rationality of slip＇s tooth mathematical model and concludes the optimized structure parameter, which makes the slip＇s tooth stress reduced by 17%.

关 键 词：顶驱下套管 卡瓦板 卡瓦牙 优化设计 

分 类 号：TH16[机械工程—机械制造及自动化] TE925.2[石油与天然气工程—石油机械设备]