摘要
螺杆泵工作时,定子衬套滞后生热和定转子摩擦生热能够大幅增加定子衬套温度,长期工作会导致烧泵现象。为了明确螺杆泵定子温度场分布规律,基于双热源模型,对不同条件下的螺杆泵定子温度场进行了数值模拟,并分析了定子衬套外径、偏心距、橡胶弹性模量以及导热系数的影响。结果表明,螺杆泵工作时,定子衬套温度远高于泵内举升流体温度,并且受定子衬套几何形状影响,其温度呈集中分布,使得厚壁处温升最高。定子衬套温升依赖于其厚度,随着厚度增加,定子衬套滞后生热增加,而螺杆泵几何尺寸的变化通过改变定子衬套厚度能够有效改善定子衬套生热现象。此外,橡胶弹性模量和导热系数决定了定子衬套变形过程中能量的耗散、存储和扩散,随着弹性模量和导热系数增加,定子衬套温升降低。总之,螺杆泵定子衬套增温受其结构和性质影响,在进行螺杆泵研发设计时,在保证其举升效能的前提下,应合理优化定子衬套结构参数和橡胶选型。
During the operation of propgressive cavity pump(PCP),the temperature of its stator will increase significantly due to lag heating and frictional heating,and pump burning may occur after long-term operation.In order to investigate the temperature distribution of PCP stator,numerical simulations of the stator temperature fields under various conditions were conducted based on a model with dual heat source,and the influence of stator bushing outer diameter,eccentricity,elastic modulus and thermal conductivity of rubber were evaluated.The results indicate that the temperature of the stator is significantly higher than that within the pump.Furthermore,influenced by the geometric shape of the stator,the temperature exhibits a concentrated distribution,with the highest temperature rise occurring at the thick-walled sections.Apparently,the temperature rise of stator bushing depends on its thickness,stator temperature increases with the increase in wall thickness,and it is worth to note that the heating phenomenon of PCP stator bushing can be improved while appropriate PCP geometry is employed.In addition,the elastic modulus and thermal conductivity of rubber determine the dissipation,storage and diffusion of generated energy during the deformation of stator bushing,and as the elastic modulus and thermal conductivity increase,the temperature rise of the stator bushing decreases.Ultimately,the temperature rise of PCP stator bushing is affected by its structure and properties,so during the design of PCP,the structural parameters of stator bushing and the selection of rubber should be reasonably optimized under the premise of ensuring its lifting efficiency.
作者
王通
马增华
赵云龙
刘明凯
勾字文
戴金明
张国栋
WANG Tong;MA Zeng-hua;ZHAO Yun-long;LIU Ming-kai;GOU Zi-wen;DAI Jin-ming;ZHANG Guo-dong(Oil Production Division,China Oilfield Services Limited,Tianjin 300459,China;College of Electromechanical Engineering,Qingdao University of Science and Technology,Qingdao 266061,Shandong,China)
出处
《承德石油高等专科学校学报》
2024年第6期54-59,共6页
Journal of Chengde Petroleum College
基金
中海油服科研项目(海上稠油高效举升关键技术研究与应用(Ⅰ期)):YSB21YF010。
关键词
螺杆泵
定子
温度场
滞后生热
摩擦生热
progressive cavity pumps
stators
temperature fields
lag heating
frictional heating
作者简介
第一作者:王通(1987-),男,宁夏中宁人,高级工程师,硕士,研究方向为稠油开发、采油工艺、人工举升、井下工具等;通讯作者:马增华,高级工程师,E-mail:mazh@cnooc.com.cn。
