Thermal Analysis of a Crossed Helical Gearbox Using FEM

Sa？etak Overheating of gearboxes with crossed axes, such as crossed helical gearboxes, is one of the greatest disadvantages of these gearboxes in comparison with other drives, such as gearboxes with bevel or cylindrical gears. High friction results in the overheating of the transmission and the occurrence of scuffing. The main cause of the overheating is the generation of heat inside the gearbox due to bearing friction, sealing friction and above all, friction between tooth flanks during engagement. By applying the finite element method, thermal stability of a gearbox was predicted, and this procedure was verified on the case of a crossed helical gearbox with an axial distance of 30 mm. Based on the performed numerical investigation, a new procedure for the prediction of heat generation in the crossed helical gear transmission was proposed