四闸板防喷器悬挂闸板卡瓦牙力学性能分析

Mechanical Performance Analysis of Four-Ram BOP Suspension Ram Slip Insert

针对四闸板防喷器悬挂闸板工作过程中产生较大应力集中,造成卡瓦牙磨损或崩牙等问题,在满足悬挂闸板工作性能的基础上,分别提出牙型张角为80°、90°、100°,牙顶形状为尖顶、平顶、拱顶,卡瓦牙分布方式为顺排和叉排,进行对比分析。通过Creo三维软件建模,ANSYS有限元软件仿真分析,综合卡瓦牙、卡瓦体和油管局部的变形和等效应力,分析不同卡瓦牙型对卡瓦牙磨损程度的影响。分析结果表明:当卡瓦牙牙型张角为90°,卡瓦牙顶形状为平顶,卡瓦牙的分布方式为叉排时,防喷器悬挂油管时对卡瓦的磨损损伤最轻;当卡瓦牙型张角为90°,牙顶形状为平顶,卡瓦牙的分布方式为顺排时,防喷器悬挂油管时,卡瓦对油管的磨损损伤最轻。研究结果可为防喷器卡瓦及其牙型的设计提供参考。

In the process of ram suspension of four-ram BOP,a great stress concentration occurs,resulting in the problems of slip insert wearing or chipping.On the basis of meeting the required working performance of the suspension ram,the slip insert opening angles of 80°,90° and 100°,the slip insert top shapes of pointed,flat and domed,and the slip insert distribution modes of parallel arrangement and staggered arrangement are proposed for comparative analysis.In consideration of the local deformation and equivalent stress of slip insert,slip body and tubing,Creo 3D modeling and ANSYS finite element simulation were conducted to analyze the influence of different slip insert types on the wearing of slip insert.The results show that,for the slip insert with the opening angle of 90°,flat top and cross arrangement,when the BOP is suspended with tubing,the wearing of the slip insert is minimum;for the slip insert with the opening angle of 90°,flat top and parallel arrangement,when the BOP is suspended with tubing,the slip insert has the minimum wearing to the tubing.The results provide reference for the design of slip insert of BOP and its types.