Load Sharing Characteristics Of Planetary Gear Transmission In High Maneuverability Non-inertial System

Planetary gear transmission with its large transmission ratio,high power to weight ratio,smooth transmission and other advantages is widely used in aerospace,wind power generation,automobile,ship,mine,lifting transportation and other fields.Load sharing is an important index to measure the performance of the planetary gear train,which is of great significance to improve the service life and reliability of the planetary gear train.The planetary gear transmission system running in high maneuverability non-inertial system moves together in space with the body,and is subject to additional effects,which will have an important impact on the load sharing characteristics of the planetary gear transmission.This dissertation takes a certain planetary transmission system as the research object,and the gear rotor-casing coupling dynamic model considering the additional load of internal non-inertial of the planetary gear train and maneuvering non-inertial is established,then the effects of typical maneuvering flight conditions on the load sharing and dynamic stress are studied.The main research contents are as follows:(1)The motion equations of each component in the internal and external non-inertial system are derived,then the dynamic model of shafting substructure and the super-element model of casing substructure are established,and the system-level dynamic model of planetary gear train in non-inertial system is established by coupling shafting and casing.(2)The load sharing characteristics of planetary gear train under typical maneuvering flight conditions,including vary-speed plane flight,rolling flight and somersault motion,are analyzed,and the variation law of load sharing coefficient with power parameters,bearing stiffness and installation and manufacturing errors during variy-speed plane flight,rolling motion and somersault motion is studied.(3)The effects of horizontal acceleration,rolling angular velocity and somersault motion parameters on the dynamic stress of the planetary gear transmission are studied;With the non-inertia system coefficient of stress which describes the influence of additional effect on dynamic stress in maneuvering non-inertial system being defined,the variation law of stress inertia coefficient under three maneuvering conditions of vary-speed plane flight,rolling and somersault motion is studied,then the influence of gear installation and manufacturing error on stress inertia coefficient under three maneuvering conditions is analyzed,so as to provide theoretical basis for high-reliability and lightweight design of planetary gear transmission in high maneuverability non-inertial system.