Design Optimization and Loaded Tooth Contact Analysis of Multispeed Gearbox for Low Noise Behaviour

Abstract

This project aims in the development of Multispeed Gearbox to exhibit low noise behavior during its operation under various load and speed conditions, by optimizing the design parameters with tooth micro-geometry profiles -using Loaded Tooth Contact Analysis (LTCA). Low-noise design is the most important criteria defined by the German customer, for their new 9 -speed gearbox fitted in the high precision tool room CNC Lathes. In loaded condition, gearbox develops noise and vibrations due to the tooth deformations, shaft deflection, internally generated gear tooth loads from non-conjugate meshing action of the gear mesh. Hence selecting the best values during micro-geometry optimization for a multi-speed gearbox becomes complex and needs a unique combination of FEM and analytical tools. LTCA is a very useful optimization tool to study the gear tooth strength evaluations and gear meshing contact characteristics under light and significant loads.