Based on the heat transfer theory, the mechanism of temperature change in stator rubber lining was studied. The coupled thermal-structure effect on the general rubber lining and equal-distance rubber lining, and the temperature field distribution characteristics were analyzed by FEA method. The effects of temperature on the two rubber lining’s thermal stress and strain law were compared with each other. The effects of static pressure, rotor speed, rubber’s hardness, Poisson’s ratio, strata temperature and differential pressure on temperature change were studied. The results showed that the general rubber lining temperature field is symmetrical ellipse, while the equal-distance rubber lining temperature distribution is uniform. The higher the temperature is, the greater the heat stress and deformation of rubber lining are. In the same condition, when the equal-distance lining’s temperature rises, the stress and strain are less than the general lining’s. The general lining’s temperature increases with static pressure, rotor speed and differential pressure. The temperature decreases with the increase of rubber’s hardness, Poisson’s ratio and strata temperature which have minor effects on the equal-distance lining’s.
