Optimal design of gear teeth modification with the minimum value of meshing-in impact

In the actual marine gear meshing process, the gear meshing points of teeth mesh-in and out will deviate from the theoretical line, which will lead to a sudden change in velocity and cause meshing impact. Off line meshing impact will generate large additional loads, which has attracted many attentions. According to the gear impact principle of teeth mesh in and mechanical dynamics theory, effect of the impact of teeth mesh in is significantly greater than that of teeth mesh out. Therefore, in this study, the discussion will focus on the impact of teeth mesh in. Optimal analysis of the impact with the minimum value of teeth mesh in includes determining the initial meshing points, calculating of meshing impact velocity and the impact force of teeth mesh out. Due to the above results, the velocity model during the impact of teeth mesh in is founded; the optimized calculation model based on loaded teeth contact analysis (LTCA) method is validated. This research obtains the results which could be referenced to understand the complex mechanism of gear teeth modification with the minimum value of meshing impact, and to be a helpful guideline in gear design.