常规螺杆钻具定子衬套的热力耦合分析  

Thermal-structure coupling analysis for general stator lining of PDM

作　　者：韩传军[1] 张杰[1] 刘洋[2] 

机构地区：[1]西南石油大学机电工程学院,四川成都610500 [2]江汉石油钻头股份有限公司,湖北武汉430223

出　　处：《中南大学学报（自然科学版）》2013年第6期2311-2317,共7页Journal of Central South University:Science and Technology

基　　金：中国博士后科学基金特别资助项目(201104700);国家自然科学基金资助项目(51004083)

摘　　要：基于传热学原理,采用有限元法分析橡胶衬套的热力耦合效应,讨论衬套温升的物理机理。分析衬套的温度场分布特点及热应力应变规律;研究橡胶硬度、泊松比以及静压、转子转速、地层温度、压差对衬套温升的影响。研究结果表明:均匀温度场的温升越高,衬套的热应力和变形就越大;衬套的非均匀温度场呈椭圆形分布,温度梯度较大;衬套的温升、最大热应力及变形量随着橡胶硬度、泊松比、地层温度的增大而减小,随静压、压差的增大而增大。通过与现场失效实例对比,验证了分析结果的正确性和可靠性。Based on the heat transfer theory, the mechanism of temperature change in stator rubber lining was studied, and the coupled thermal-structure effect on stator rubber lining was analyzed with the finite element simulation. The temperature field distribution characteristics, thermal stress and strain law were analyzed. The effects of rubber hardness, Poisson ratio, static pressure, rotor speed, strata temperature and differential pressure on temperature change were studied. The results show that higher temperature leads to greater heat stress and deformation of rubber lining. The lining non-uniform temperature field is in symmetrical ellipse and there is a greater temperature gradient. The rise of temperature, the largest thermal stress and deformation decrease with the increase of the rubber hardness, Poisson ratio and strata temperature, and increase with the increase of the static pressure and differential pressure. The analysis results are proved to be correct and reliable compared with the field failure cases.

关 键 词：橡胶衬套 有限元 热力耦合 温度场 

分 类 号：TE921[石油与天然气工程—石油机械设备]