Mechanical closed transmission device for coaxial double-propeller helicopter main reduction test bed

The invention relates to the field of transmission, and particularly relates to a mechanical closed transmission device for a coaxial double-propeller helicopter main reduction test bed. The device comprises a coaxial double-propeller main reducer including an outer rotor shaft and an inner rotor shaft, a pair of coaxial double-propeller transmission assemblies which are symmetrical to each other,the outer rotor shaft and the inner rotor shaft. The coaxial double-propeller transmission assembly comprises an inner rotor upper gear box, an outer rotor upper gear box, a reversing gear box and ahigh-speed gear box. The device lays a foundation for overhaul and localization development of the main reducer of the type. 本发明涉及传动领域，是用于共轴双桨直升机主减试车台的机械封闭传动装置。该装置包括：包括外旋翼轴和内旋翼轴的共轴双桨主减、相互对称的一对共轴双桨传动组件、外旋翼轴、内旋翼轴；共轴双桨传动组件包括：内旋翼上置齿轮箱、外旋翼上置齿轮箱、换向齿轮箱和高速齿轮箱。本发明为该型主减的大修和国产化研制奠定基础。