摘要
针对DTY500型往复式页岩气压缩机因自然冷却式气缸内外温差大、压力高而产生变形的问题,建立了自然冷却式压缩机气缸热-机耦合共轭传热模型,基于有限元法开展了气缸内温度场与热-机耦合下的气缸变形研究,掌握了压缩机气缸整体温度场特性与变形量的分布特征,对比分析了气缸轴向与周向的温度与变形规律,建立了以圆度差值和径向平均变形量作为工作腔变形评价指标,在此基础上,开展了气缸温度测试试验,气缸表面温度测点平均误差为4.29%。结果表明:最高温度为104.78℃出现在工作腔与排气腔之间的内壁区域,其中周向温度差异为10.35℃和轴向温度差异为6.87℃,导致气缸最大圆度差值为0.249 mm,致使活塞拉缸。研究结果对提高活塞工作寿命和保障页岩气压缩机安全稳定运行具有重要意义。
In order to solve the problem of deformation due to high pressure due to large temperature difference between inside and outside of the natural cooling cylinder of the DTY500 reciprocating shale gas compressor,the heat-mechanical coupling conjugate heat transfer model of the natural cooling compressor cylinder was established,the cylinder deformation under the temperature field and heat-mechanical coupling in the cylinder based on the finite element method was studied,the distribution characteristics of the overall temperature field and the deformation of the compressor cylinder were mastered,and the temperature and deformation law of the axial and circumferential direction of the cylinder were compared and analyzed.The roundness difference and radial average deformation were established as the evaluation indicators of the deformation of the working cavity,and on this basis,the cylinder temperature test was carried out,and the average error of the cylinder surface temperature measurement points was 4.29%.The results show that the maximum temperature appears in the inner wall area between the working cavity and the exhaust cavity,which is 104.78℃,of which the circumferential temperature difference is 10.35℃and the axial temperature difference is 6.87℃,resulting in the maximum roundness difference of the cylinder being 0.249 mm,causing the cylinder pulling by the piston.The research results are of great significance for improving the working life of the piston and ensuring the safe and stable operation of shale gas compressors.
作者
李琴
王硕
王智勇
李涛
母德全
王杰
LI Qin;WANG Shuo;WANG Zhiyong;LI Tao;MU Dequan;WANG Jie(School of Mechanical and Electrical Engineering,Southwest Petroleum University,Chengdu 610500,China;Oil and Gas Equipment Technology Sichuan Province Science and Technology Resource Sharing Service Platform,Chengdu 610500,China)
出处
《流体机械》
CSCD
北大核心
2023年第7期39-45,共7页
Fluid Machinery
基金
国家科技重大专项(2016ZX05040-006)。
关键词
页岩气压缩机
有限元分析
热-机耦合
气缸
圆度差值
变形
shale gas compressor
finite element analysis
thermal-mechanical coupling
cylinder
the roundness difference
deformation
