Study on nonlinear vibration characteristics of elastic web herringbone gear transmission.

Abstract

In the advanced helicopter gear transmission system, the elastic web gear structure is a new type of vibration reduction structure. Its vibration reduction mechanism, parameter value and control strategy are all scientific problems to be solved urgently. This paper establishes the nonlinear dynamic equation of elastic web herringbone gear transmission system under multi-factor coupling. The influence of four potentially applicable elastic materials on the system dynamic load sharing performance is explored. Then the effects of these two materials on the system nonlinear vibration characteristics under different working conditions are analyzed. Finally, the variation of dynamic load coefficient (DLC) and load sharing coefficient (LSC) with input/output torque excitation and system structure size under the action of two materials is analyzed. The results show that compared with elastic web without consideration, when the web is made of beryllium copper, Ni40Cr20Co20Mo, spring steel and silicon rubber, the DLCs of the left and right sides of gear pair are different by 21.68%, 7.64%, 21.55% and 3.5%, so the load sharing performance of silicon rubber is better. When the input speed changes, when the silicone rubber is used than the superalloy, the periodic motion area of the system is relatively large, which is beneficial to improve the system stability. With the change of input power, silicone rubber is more beneficial to periodic motion than superalloy. The research results can guide the design, optimization and control of the new generation of helicopter and ship elastic web gear system.