Analysis of a piston pin system with hydrodynamic lubrication / Analise dinamica de um sistema pino-pistão com lubrificação hidrodinamica

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

This work aims to analyze the dynamic behavior of the piston pin system. For this reason, a mathematical model for the slider-crank mechanism was developed, considering the influence of the hydrodynamic bearing of the piston-connecting rod joint. The dynamic analyses of the system applied two distinct models. The first represented the system when the piston pin was in contact with the bearing surface, assuming, in this condition, a similar behavior of rigid bearings (without clearance). The second model represented the system when the piston pin was in hydrodynamic lubrication. Under this condition, the piston pin presented a relative motion to the conrod, what turns this system into a multidegrees of freedom problem. Therefore, the first model was developed by Eksergian s Equation of Motion and the second model was developed by Lagrange method. The mathematical model of hydrodynamic lubrication was introduced to obtain more realistic results under the system s dynamic behavior. This lubrication model considers one of the basic assumptions of the Reynolds lubrication theory. From the model developed in this work were obtained the orbits of the piston pin, the pressure distributions and the velocities and accelerations of the slider-crank mechanism, what allows a preliminary analysis of the dynamic behavior of this system

ASSUNTO(S)

hydrodynamic bearing mancais automoveis - motores - sistemas de lubrificação hydrodynamic lubrication piston automoveis - motores conrod-crank

ACESSO AO ARTIGO

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