Study On The Design Of Electromagnetic Fan Clutch System Based On Vibration Problems

After studied about the domestic and foreign research situation of electromagnetic fan clutch and the design requirements of the enterprise,this paper study on the design of electromagnetic fan clutch system based on vibration problems. Relied on actual project, the research accord with the energy saving in the current needs of our country, haved important theoretical and reality significance.Firstly, analyzed the structural characteristics of electromagnetic fan clutch system and assembly principle, studied the three operating modes of the product, include the non-operating mode,low-speed mode and high-speed mode,and studied the structure of the electromagnetic fan clutch and the two structures of flexible flange,one is the original structure and the other is alternative structure.Based on the structural characteristics and working principle of the product, designed a new flange structure to provide more ideas for the research.Depending on the vibration characteristics of the structure,the overall plan was presented.Secondly,analyzed the excessive vibration problem of the electromagnetic fan clutch system system,and the dynamic model of the structure was worked out.Analyzed the dynamic model with vibration theory,introducted the vibration differential equation.Then the finite element analysis model of the structure was builded for simulation analysis,and the bending,radial and axial natural frequency of the structure were calculated,and the cause which make the product has a excessive vibration problem was found out.At the same time,the alternative structure of the flexible flange was analysised,the result showed that the alternative structure of the flexible flange can meet the work requirement,but now it is difficult to product.According to corporation requirements,the paper then proposed an improvement design program for the flange to solve the vibration problem.To avoid the drawbacks of the improvement design program,proposed the optimization design scheme for the flange structure.The main work included that established the parametric model,optimal design model and the realization of optimization.The result showed that the method can not only solved the vibration problem of structure in theory,but also successful validated by the test bench. Furthermore the quality of the flange was decreased by 21.92%,achieved a lightweight better result.From the global system,introducted the parametric sensitivity analysis technique to analyze the situation that parameters affect the bending natural frequency of the the system structure,and worked out the curves and surfaces of bending natural frequency sensitivity analysis.Learned from the sensitivity analysis curves and surfaces,selected the sensitivity parameters for the system parameter matching design.The results showed that this method can better coordinate the contradictory of the performance, making the overall performance of the structure better.Results showed that the optimization design scheme and the parameter matching design proposed scheme in the paper were effective and advanced.What is more,the two methods can make a good reference for the similar product to design.