Study on Static Load Sharing Characteristics of Coaxial Reversal Herringbone Gear Transmission System Considering Error

Abstract

In the current high-speed helicopter main reducer, coaxial reversal herringbone gear transmission system (CRHGTS) has the advantages of light weight, high stability and long service life. In order to study the static load sharing characteristics of coaxial reversal herringbone gear transmission system, considering the factors such as transmission chain stiffness, installation error and manufacturing error, the torque balance equation of the system is established, the deformation coordination condition of the system is deduced, and the influence of manufacturing and installation errors on the load sharing performance of the system under single and combined action of gears is analyzed. The result shows that when the gear has manufacturing error, the load sharing coefficient fluctuates periodically. When the manufacturing error acts on the reversal gear and the output gear at the same time, the load sharing performance will be reduced. When the gear has installation error, the load sharing coefficient of the system is linear. The increase of gear manufacturing error and installation error will lead to the increase of load sharing coefficient and reduce the load sharing performance of the system.