The invention relates to a tandem type double-coaxial double-rotorcraft transmission system. Comprising an intermediate shaft unit symmetrically connected through multiple sections of parallel operation shafts, engine output speed reduction units symmetrically connected to the left side and the right side of the intermediate shaft unit, and a front rotor wing reversing speed reduction unit and a rear rotor wing reversing speed reduction unit which are connected to the outer sides of the engine output speed reduction units correspondingly. According to the transmission system, a front engine and a rear engine are adopted for output, power is transmitted to a lower rotor wing shaft after speed reduction of a first-stage bevel gear and a second-stage helical cylindrical gear in a rotor wing speed reduction unit, power is transmitted to an upper rotor wing after speed reduction of a third-stage helical cylindrical gear, and coaxial reverse rotation of the upper rotor wing shaft and the lower rotor wing shaft is achieved through an inner shaft and an outer shaft. Front and back coaxial double-rotor power transmission is realized; the residual power is transmitted to a fan through a front-stage bevel gear and a rear-stage bevel gear to realize ventilation and cooling of a reversing bevel gear in a speed reduction system of the rotorcraft; the design can greatly improve the power utilization efficiency and the hovering efficiency of the helicopter, and is beneficial to reducing the weight of the system.
本发明涉及一种纵列式双共轴双旋翼机传动系统,包括通过多段并车轴对称连接的中间轴单元、对称连接在中间轴单元左右两侧的发动机输出减速单元以及分别连接在发动机输出减速单元外侧的前旋翼换向减速单元和后旋翼换向减速单元;该传动系统采用前后两个发动机输出,通过旋翼减速单元中第一级锥齿轮,第二级斜齿圆柱齿轮减速后将动力传输至下旋翼轴和第三级斜齿圆柱齿轮减速后将动力传输至上旋翼,上旋翼轴和下旋翼轴通过内外轴实现共轴反转,并实现前后共轴双旋翼功率传递;并将剩余动力通过前后一级锥齿轮传递至风扇实现旋翼机减速系统中换向锥齿轮的通风冷却;该设计能够极大的提高动力利用效率直升机悬停效率,有利于减轻系统的重量。
Tandem type double-coaxial double-rotorcraft transmission system and rotorcraft
一种纵列式双共轴双旋翼机传动系统及旋翼飞行器
2024-07-23
Patent
Electronic Resource
Chinese
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