Abstract: In order to further analyze the connection performance of cone interference fit joint,taking the cone interference fit joint of a diesel engine crankshaft vibration damper for example,the combining diameter expression of cone interference joint was deduced and the formula of contact pressure and the torque transmit of interference fit was obtained through establishing interference fitted theory model.The interference fitting of crankshaft and the main hub was simulated and analyzed by using ANSYS.The effects of fit tolerance,coefficient of friction,rotational speed and the contact stress distribution on the mating surfaces were discussed in the numerical computation.The result showed that the effects of fit tolerance and rotational speed are obvious;the fit tolerance has a linear relation with the contact stress and the coefficient of friction has little effects for the distribution of contact pressure at the crankshaft resting.

Key words: crankshaft vibration damper, interference fit, FEM, contact analysis, contact pressure