Multi-objective optimal design of modification for helical gear

Vibration and noise produced in the process of gear transmission and uneven distribution load on tooth surface seriously affect the transmission performance of gear system. Gear modification is a valid technology to solve this problem. Gear meshing contact analysis considering gear modification, assembling errors and processing errors can accurately obtain the meshing performance under the simulated real working condition. On the one hand, it can provide load distribution on tooth surface, on the other hand, it can provide data for dynamic characteristic analysis. Therefore, taken gear meshing contact analysis as the link, the connection between gear modification, load distribution on tooth surface and dynamic model of gear system is established. A multi-objective modification optimal design method for helical gear considering vibration/noise reduction and load even distribution on tooth surface is proposed. An example is provided to illustrate the proposed method. The results show that the root mean square value after optimization reduces nearly 4 times and the load difference between left and right tooth surfaces after optimization reduces nearly 320 times, the modification optimization effect is very obvious.