Influence of drumshaeped modification and deflected load on strength of spur gears
                                                                              CAO Ran, XIA Jianfang
                                     (School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China)

Abstract: Aiming at the problem of serious edge contact between involute cylinder gears caused by deflected load, the antideflection ability of drum corrected gear was studied. The finite element model of the spur gear pair under load was established by the software Abaqus. Starting from drumshaped modification and deflected load, the distribution law of drumshaped modification which at 0, 20μm, 50μm and deflected load which at 0°, 0.1°, 0.2°on the stress distribution characteristic of gear was analyzed, and the interaction between drumshaped modification and deflected load was researched. The results indicate that the drumshaped modification can reduce the edge stress concentration of gear, which impels stress concentration region to move to the middle of gear. Deflected load will increase the contact stress and bending stress will be significantly. Drumshaped modification can enhance the antideflection modification ability of gear and reduce the edge contact.

Key words: drumshaped modification; gear drive; deflected load; finite element method; contact stress; bending stress