某型航空用矩形截面弹簧逆止器设计

Due to its bulk and weight, the conventional anti-reverse mechanism is not appropriate for use in aircraft items that are very responsive to weight indicators. In this paper, a design method for the small and lightweight rectangular cross-section spring anti-reverse device is proposed. Through the mechanical analysis of the rectangular cross-section spring in the anti-reverse device, the relationship between the force and deformation of the rectangular cross-section spring is deduced. The anti-reverse performance with the size of the rectangular cross-section spring and the interference with the matching sleeve is studied. Genetic algorithms are used to determine and resolve the effective working conditions of the spring anti-reverse device with a rectangular cross-section. The structural model of the rectangular cross-section spring anti-reverse rotation device is established by CATIA software, which is imported into HyperWorks software for verification analysis. By the manufacture and measurement results of the designed prototype, it is shown that the weight of the rectangular section spring anti-reverse device designed based on this study can be reduced by 60% compared with the traditional friction disc type under the same load condition. The correctness and reliability of the design method are verified by comparing the simulation results with the experimental data.