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. (c) 2021 Elsevier Ltd. All rights reserved. Vibration and noise of gear system threaten the safety of equipment, the health of operators and the comfort of environment. The reduction of vibration/noise has become an important research direction in gear design. In the process of gear transmission, the transmission shaft, bearing and gearbox will occur elastic deformation under the load. In addition, the gear alignment error in manufacturing, the error of bearing hole and the deformation under load caused by the axial non parallelism, as well as the deformation caused by centrifugal force and thermal deformation caused by temperature difference of high-speed gear will cause local load concentration and lead to tooth surface damage or fracture in high load area. Gear modification is a valid technology to reduce the vibration/noise of gear transmission device, which has been more 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.

Automated summary

Gear modification is an effective technology to address vibration, noise, and uneven load distribution in gear transmission. By analyzing gear meshing contact, accurate performance data can be obtained, leading to optimization solutions for gear systems.