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A new type of seal ring bush silent chain (Zhenming chain) is brought forward and developed for the problem of severe vibration and high noise in the process of the motorcycle roller chain transmission. The structural innovation, mathematical modeling process and meshing principle of the silent chain are explained, and the RecurDyn dynamic simulation models of the new seal ring bush silent chain and a roller chain are established, which generate the operating wave curve caused by the polygon effect in the meshing process. The new seal ring bush silent chain is verified by variable speed and variable load wear test, noise test and road driving test. The results show that the noise of the new seal ring bush silent chain is lower than that of the roller chain, and the wear elongation of the new seal ring bush silent chain is lower than the roller chain. At the same time, it is proved that the innovative design scheme of the new seal ring bush silent chain is scientific and feasible.

The calculation of meshing force between chain links and sprocket is one of the chain transmission dynamics research focus. An approximate equation of sprocket meshing force is derived,under the condition of the local deformation before and after a single roller engaged with the tooth. Taking the main chain drive of a certain round balers as the research object,the dynamic characteristics and meshing force of main chain transmission system with multi-driven wheels in baling process of round balers under the condition of actual load torque are obtained through the simulation,the dynamics characterization of the chain drive system is analyzed and the validity of the model is verified,which present a certain operational method for actual agricultural machinery design.