Influence of tooth profile modifications on planetary gear set behavior

VDI Int. Gear Conference Munich (Germany), September 2019

The aim of this work is to perform an experimental and numerical investigation of the dynamic behavior of a planetary gear set. Measurements are performed using a specific test bench and are compared with numerical results obtained from an efficient computational scheme. Two similar planetary gear sets are considered in order to study the influence of tooth profile modifications on the static transmission error and on the dynamic behavior of the planetary gear set. The first sample consists in standard gears without tooth modifications, while in the second sample, sun gear and planets have with tip relief corrections. First, the internal parametric excitations, corresponding to the static transmission errors (STE) and the mesh stiffness fluctuations, are characterized. Then, the dynamic behavior is investigated. The comparisons between numerical results and measurements show that the computational scheme leads to satisfying results.