Balance Analysis of Reciprocating Inertia Force Based on Multi-Body System Simulation

In signal cylinder diesel engine we often use dual shaft balance mechanism to balance reciprocating inertia force produced by the piston and moving parts, and reduce vibration of diesel engine. For this paper, the model crank -connecting rod and balance mechanism of a signal cylinder diesel engine were built in simulation software ADAMS. Piston’s movement law and its force curve have got through multi-body dynamics simulation to the model .By further processing to the simulation results, we got curves of piston’s reciprocating inertia force and balance shaft’s balance force. Comparing the two curves, we got the following conclusions: the difference between positive and negative peak for reciprocating inertia force that haven’t balanced was about 5500 Newton, which was equal to around 34% of the difference between the positive and negative peak for reciprocating inertia force, and the main reason for this is the dual shaft balance mechanism only balanced one step reciprocating inertia force; Though the balance effect was quite obvious, for ideal conditions there is a difference, and further improve can be done.