The gearbox wears state monitoring and evaluation based on on-line wear debris features

The teeth of planetary gear trains are prone to wear and can be damaged. In traditional wear monitoring, the equipment needs to be disassembled, and the efficiency is low. The wear debris in lubricating oil can provide information about machine wear. On-line oil monitoring technology can easily recognize the change of wear debris concentration in the gearbox oil pan without the need for disassembling equipment. However, existing online monitoring systems are often based on wear debris concentration, providing limited information on particle shape and type, which are important for root cause analysis. In this study, some new features of wear debris were extracted for on-line wear monitoring in order to improve wear state evaluation and prediction using on-line approach.