Thermal-structure coupling analysis for general stator lining of PDM

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.