Research On The Designing Of Rhombic Driving Stirling Engine

Stirling Engine(SE) is a kind of regenerative internal combustion engine with the characteristics of multi-fuel adaptability. It plays an important part to change the shortage of petroleum fuel, reduce the environmental pollution and to be used in military field etc.. The dimensional optimization and synthesis of rhombic driving SE, its performance simulation and modeling by virtual prototype were studied in this paper. In order to prove the rationality of the design parameters for the driving mechanism, the kinematical and dynamical simulation of the mechanism was carried out.Firstly, the mathematics model for dimensional synthesis of rhombic driving SE was established based on the circulating theories of Stirling thermodynamics. The objective function was to maximize the thermal power from the working medium in one cycle. In this way the output power of SE would be maximum when the other parameters have be determined and the parameters of driving mechanism satisfied the restrictive conditions.Secondly, the parameters relative to the performance of SE were analyzed according to Constant Temperature Process Method. A mathematics model was established based on the analysis results and a software package for performance simulation of SE was developed so that the performance could be predicted before a SE would be manufactured.Thirdly, the 3D model of the mechanism was established from the results of mechanism optimization by using SolidWbrks and the kinematical simulation was carried out on the support of Cosmos/Motion environment so that the rationality of the optimized parameters and the kinematical curves could be proved.Finally, the feedback design of the parts was carried out according to the simulation results of virtual SE prototype. By this method, the virtual prototype would be more close to the physical machine to be manufactured.