| Citation: | QIAO Yujuan, PENG Shuai, WANG Haitao, et al. Construction and contact analysis of point-contact spur gear pairs[J]. Journal of Aerospace Power, 2025, 40（4）：20240759 doi: 10.13224/j.cnki.jasp.20240759
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In order to solve the problem of abnormal meshing of gears due to axis error, a construction method of point-contact spur gear pair was proposed. By selecting two points at both ends of the tooth surface of the virtual auxiliary involute gear, a smooth curve was obtained to connect the two points as the meshing trajectory of the driving wheel, and a curve meshing with the meshing trajectory was solved. Then, the tooth surfaces of the two gears were constructed by the tooth profile sweeping along two meshing trajectories. By setting specific parameters, geometric and solid models of point-contact spur gear pairs were established in MATLAB and UG respectively, and the contact shape and contact stress of the point-contact spur gear pairs were compared and analyzed during normal and abnormal meshing conditions. The results showed that the two tooth planes kept the point contact state along their respective meshing trajectories during meshing, the meshing points were on the theoretical meshing line, and the contact process of the solid model was consistent with the theoretical meshing simulation process. The meshing points of the gear pair were still elliptically distributed in the abnormal meshing state, and the difference between the stress value and the stress value of the normal meshing was about 18.09%.
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