Research on multiple-split load sharing of two-stage star gearing system in consideration of displacement compatibility

• Developed a meshing error analysis in star gearing system
• Established a refined mathematical model of loading sharing coefficient calculation
• Obtained the regular curves of load sharing coefficient
• Conducted a load sharing coefficient test experiment

Further analysis was developed on multiple-split loading sharing among star gears of two-stage star gearing system in aero-engine, and a meshing error was analyzed on the eccentricity error, gear thickness error, base pitch error, assembly error, and bearing manufacturing error of gear components of the star gearing system respectively. This research, in view of the floating meshing error resulting from meshing clearance variation caused by the simultaneous floating of all gears, established a refined mathematical model of two-stage multiple-split loading sharing coefficient calculation in consideration of displacement compatibility, obtained the regular curves of the load sharing coefficient, and conducted a load sharing coefficient test experiment of star gearing system to verify the research results, which can provide scientific theory evidence for proper tolerance distribution and control in design and process.