The Thermal Analysis Research On Bearing Of Helicopter Main Reducer

Bearing is widely used as an important part in mechanical transmission for rotating of gearingand other rotating component. The bearing of helicopter main reducer works in high speed，heavyload and the complex working conditions. Heating is produced because of friction and lubricating oilviscous shear. If heating cannot be sent out effectively，the high temperature will cause thermaldeformation and fatigue failure. The efficiency and life of main reducer are affected. Based on thisreason，this paper will focus on the steady-state and the transient thermal analysis of the bearing of thehelicopter main reducer. In use of the thermal network method and the finite element method，mainresearch are as follows：1）Based on Hertz contact theory，the load and dynamic analysis have been carried out. It laysfoundation for the heating calculation.2）In the research of working conditions of the helicopter main reducer，the suitable heatingcalculation model of convective heating transfer model are researched and selected.3）Using the thermal network method，the heat balance equation of the bearing is establishedand solved for the steady-state temperature field.4）Based on the finite element method，the meshing and thermal loading of the bearing isresearched. The steady-state temperature distribution nephogram is obtained using the thermalanalysis module of ANSYS Workbench，and is also compared with the calculating result of thenetwork method.5） The variation rule of the thermal parameters，the convective heat transfer coefficient andthermal resistance are researched. The transient temperature field of bearing is calculated on theextreme working conditions based on.