Research On The Mechanism Of Load Sharing Characteristics Of High-speed And Heavy-duty Herringbone Gear Planetary Transmission System

The herringbone planetary transmission system is widely used in ships,aerospace and wind turbines due to its small size,long life,lightweight,complex structure,large transmission ratio,and high load sharing capacity.As one of the core components of these types of heavy industrial equipment,the reliability and stability of the herringbone planetary transmission system are extremely important for ensuring the safe operation of the equipment and largely determines the performance and life of industrial equipment.When the industrial devices develop to greater torque,higher speed,higher precision,and smaller quality,the load sharing characteristics are an important reference index for the stability and reliability of the herringbone planetary transmission system in facilities,which is highly suspected by the internal parameters.Therefore,it has vital theoretical significance and engineering application value to study the influence mechanism of the variation of the parameters of the herringbone planetary transmission system,during the manufacturing and installation process,on its system load characteristics.This work takes the herringbone planetary transmission system in wind turbine as the research object and focuses on the mechanism of the load sharing characteristics to research the mechanism of the influence of the stiffness variation,the floating components,the flexible support condition and the multi-coupled errors in the manufacturing and installation process on the load sharing characteristics of the herringbone planetary transmission system,which provides a new idea for the design and optimization in generation of new herringbone planetary transmission system in wind turbines.The main research works in this paper are as follows,(1)Based on the concentrated parameter theory and the Lagrange method,the dynamic model of the load sharing dynamics of the herringbone planetary transmission system is established.At the same time,the dynamic excitations in the herringbone planetary transmission system are studied,and the influence excitations of the herringbone planetary transmission system when it is dynamic operating are obtained.(2)The mechanism of the influence of the system stiffness variations in the herringbone planetary transmission system on the load sharing characteristics is studied.Especially,the influence mechanism characteristics of the variations of the support stiffness in the herringbone planetary transmission system,the change of the coupled torsional stiffness of the left and right side of herringbone gears and the change of meshing stiffness of inner and outer meshing lines are studied.(3)Under the different conditions that the sun gear is normally supported and the sun gear is floating,the influence of the flexible support on the load sharing characteristics of the transmission system is studied,where the supporting structure of the gear is changed to realize the flexible support.The modal characteristics of the transmission system under these two different conditions are studied,which are compared to obtain the changing law of flexibility and component floating.(4)The influence of the meshing error of the herringbone planetary transmission system on the load sharing characteristics is studied.In particular,the manufacturing error,installation error,multiple coupling installation errors,multi-coupling manufacturing error and multi-coupling error of the herringbone planetary transmission system are studied.(5)The 3D model of the herringbone planetary gear transmission system is designed,and this model is imported into ADAMS to simulate in the form of a virtual prototype.In the simulation,the mathematical model proposed in this work and the numerical calculation solution of the dynamic characteristics of the transmission system is experimentally verified.