Thermal-Structural Coupling Analysis For GSS Series High Speed Gearbox

As the core unit for the Evaporation process, the MVR water vapor compressor is widely used in mechanical vapor recompression domain for various industries. As the key component of centrifugal compressor, GSS high speed gear box has a direct influence on the stability operation for the MVR process. Different from general high-speed gear boxs, the impeller of centrifugal compressor is suspended at the end of high speed shaft by the tie rod, with heavy unbalance loading imposed in this situation. Because of the above reason, the strength and stiffness of the box should be checked.In this paper, a GSS high-speed gear box is modeled and analyzed. Firstly, static characteristic is analyzed by using FEM method at full loads condition. Then the details of heat generation and transmission for some parts are considered by using friction theory and heat transfer theory. Furthermore, the thermal-network graph is drawn by the basic principle of thermoelectric match by lumped-heat-capacity method. The temperature of setting code is calculated with the calculation of thermal balance equation, which is simulated by the MATLAB. The details of temperature are also simulated with the test data to verify this method. At last, parts of the results of temperature for the thermal-net work are designed to ANSYS Workbench to acquire the whole temperature distribution of the system. The result is set to the thermal-structural coupling analysis. Deformation value of the bearing hole is also calculated, and then compared with the Structural analysis and the effect of deformation is analyzed and taken into account for the helix deviations of gear.