Failure Analysis of Planetary Gear in a Geared Rotary Actuator Used in Aircraft Flight Control System

Ran, Jun; Yin, Guangqiang

doi:10.1109/icedme50972.2020.00091

Cited by 1 publication

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“…e gear rotary actuator adopts the principle of planetary gear transmission, which is small and light in weight, and can achieve high torque output in a limited space. It has been used increasingly in aircraft high-lift systems and has become the preferred actuator for high-lift actuation systems [2]. During the working process, gears are subjected to alternating loads, resulting in tooth surface contact and tooth root bending fatigue damage, which are common failure modes, among them, tooth root bending fatigue damage is the main failure mode [3].…”

Section: Introductionmentioning

confidence: 99%

Tooth Root Bending Fatigue Performance of Shot Peening TM210A Steel Spur Gear

Yin

Tong

2022

Advances in Materials Science and Engineering

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Tooth root bending fatigue performance is the primary consideration in gear design. To investigate the difference between the tooth root fatigue performances of shot peened and base material, TM210A steel gears and double-tooth pulsating bending fatigue experiment with a stress ratio of 0.05 was carried out on the experimental gears by the group method and the staircase method. The fatigue life of experimental gears with different stress levels and the conditional fatigue limit under 1 × 107 cycles were obtained, and the S-N curves were fitted by the double-weighted least squares method. The tooth root residual stress of the shot peened gear was measured by the X-ray diffraction method, the stress field at the tooth root was calculated by the finite element method, and the fatigue failure mechanism of the shot peened gear tooth root was analyzed. The results show that shot peening can significantly enhance the tooth root bending fatigue life and strength of TM210A steel gear, and the tooth root bending fatigue limit of shot peened gear is about 2.18 times that of base material gear. The residual stress generated by shot peening keeps the fatigue source away from the tooth root surface, and the smaller the external load stress, the farther the fatigue source is from the surface, and the smaller the range where the fatigue source can occur.

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Section: Introductionmentioning

confidence: 99%