Computational Analysis of the Effect of Balancer on the Vibration Performance of the Engine: Experimental and Simulation

Abstract

Torsional torque is considered as one of the loads that the crankshaft is constantly transferring. This force causes torsional stress (torsional stress due to torsion) in the fixed crankshaft bearings and shear stress in the movable bearings. Due to the effect of different parameters in the balancer design, e.g. inertial forces, the mass of weights, off-center, and distance from the axis of the crankshaft the need for extensive research in this field is sensed. The research investigates the effect of the balancer on reducing engine vibration. The main objective was to study the kinetics of the engine using Adams engine software by application experimental data. And finally comparing test results with software results to confirm created simulation. By analyzing the output signal, the root mean square (RMS) value of experimental data, the balancer reduced the amount of RMS value of engine vibration at 750 rpm in no-load mode by 40.46%, and 12.73% at the rotational speed of 2400 rpm. Accordingly, using the balancer with no-load was more effective at lower speeds. In the case of no-load mode, the use of a balancer reduced vibrations by 28.83%. It was found that in full load condition, the RMS of the engine vibrations increased with increasing engine speed. Experimental and simulated by software results were highly consistent with experimental results, which confirms the validity of the created simulation.