Gear typical fault modeling and fault signal characteristics analysis

The gear transmission system has the advantages of high transmission efficiency and compact structure, and is widely used in a variety of mechanical equipment. However, due to the harsh working environment, key components such as gear pairs are prone to failure, which seriously affects the safety and stability of mechanical equipment. Therefore, it is very necessary to carry out modeling research on typical fault models of gear transmission system components, and to explore its fault mechanism and vibration characteristics. Most of the existing models model gear trains under normal conditions. Although some models have established failure models, they only consider the failure model of a single pair of meshing gears. Aiming at the above shortcomings, this paper establishes the fault model of single-stage fixed shaft gear system based on the dynamic model of single-stage fixed shaft gear system and combined with the energy method. The single-stage gear system’s dynamic response when a single gear is normal, cracked and peeled is solved and analyzed, and their spectrum characteristics are analyzed. It provides a theoretical basis for the health monitoring and fault diagnosis of the gear system.