Dynamic Simulation and Optimum Design for the Crankshaft-Rolling-Bearing System of a W-Type Reciprocating Compressor

Two problems about a crankshaft-rolling bearing system in a W-type reciprocating compressor,are studied by ADAMS,a special software for dynamical simulation.One is the dynamic performance of the system and the other is the dynamic optimization.The nonlinear formula between the applying load and the displacement of crankshaft journal center in the main rolling bearings is used to build the dynamical simulating model of the system in ADAMS and the crankshaft was treated as a flexible one.The dynamic response of the crankshaft journal center and dynamic reacting forces of the two rolling bearings are obtained on rated operating condition.The mathematical model for dynamic optimization is presented,and its objective function is weighted sum of the amplitude of the crankshaft journal center in the two bearings and the design variable is the angle of cylinder lines.The parametric simulating model is constructed in ADAMS to search the optimum solution.The relation between the design variable and objective value is disclosed through 'design study',which is a function module in the design evaluation tools of ADAMS.Numerical results are available for the dynamic design of reciprocating compressor.