Dynamic Modeling and Analysis of Gear Coupling

Coupling is used to connect two shafts or shafts and rotary parts of a mechanical transmission components, according to whether or not the introduction of elastic elements, can be divided into flexible coupling and elastic coupling. Elastic coupling has the ability to produce a certain degree of elastic deformation and damping effect of the elastic element, not only to compensate for the relative displacement between the two shafts, but also buffer and vibration damping effect of the mouth.

At present, the linear model based on linear stiffness and viscous damping coefficient is mainly used to analyze the vibration damping performance of the coupling, and the calculation of the dynamic characteristics of the coupling under simple harmonic load and impact load under this model is discussed in detail. In view of the nonlinear characteristics of the elastic coupling, takes the two rotor systems coupled by the elastic coupling as the research object, and discusses the effects of nonlinear stiffness and nonlinear damping of the coupling on the torsional vibration response of the system under impact loads respectively. In the mathematical modeling of elastic couplings, using the fitting decomposition method and the principle of damping equivalence on the vibration test data of large deflection elastic coupling vibration test data processing to establish a nonlinear hysteresis recovery force mathematical model related to the amplitude of the vibration displacement. derived a quantitative formula for the dynamic stiffness of the shaft coupling on the basis of the data obtained from the dynamic test of the coupling, which shows that the dynamic stiffness is a strong function of the average torque, and the dynamic stiffness is not a strong function of the vibration frequency.

On the basis of previous research, a restoring force model of a tooth-type rubber-elastic coupling is established by combining finite element technology and theoretical analysis, and then the dynamic equations of the coupling shaft system are established to analyze the amplitude-frequency characteristics and torque transfer coefficients of the coupling.