Thermal-Structural Coupling Analysis And Optimization Design Of Clutch Diaphragm Spring For Mine Truck

As the core component of the clutch,the performance of the diaphragm spring will directly affect the clutch's handling performance.Therefore,the research and optimization design of the performance of the diaphragm spring is gradually becoming a hot issue in the field of automotive research.Mine trucks are mainly used for transporting coal and ore in open pit mines,Clutch is used frequently.Due to the complex and changeable road conditions,large cargo load and short transportation distance.Mine truck in starting and shifting clutch friction while travelling and climbing will produce a lot of heat,inside short time to accumulate in the clutch assembly,can make the clutch assembly,the temperature rise sharply,leading to appear in the working process of the working load of the clutch reduce delay,clutch separation not thoroughly,separating the pedal force increases,the issue such as difference of clutch control performance.In order to analyze the causes of the above problems and optimize the design of the diaphragm spring,following research has been done:(1)According to the working principle of the diaphragm spring in combination with the traditional A-L formula,the mechanical analysis of the diaphragm spring under different operating conditions is established,and the mechanical model of the diaphragm spring under different operating conditions is established to facilitate later optimization.(2)Analyze the steady-state temperature field distribution of the diaphragm spring under different temperature conditions,perform a thermo-structure coupling analysis on the diaphragm spring in the engaged state,and analyze the behavior of the diaphragm spring in the engaged state under different temperature conditions.Changes in load-deformation characteristics.(3)Through the thermo-structure coupling analysis of the diaphragm spring in the separated state,the change of the separation load,separation stroke and pressure plate stroke under different temperature conditions is obtained.And determine the structural parameters that affect the separation characteristics of the diaphragm spring.(4)Taking the minimum average value of the compression force change at the large end of the diaphragm spring in the wear range as the main goal and the minimum average value of the separation force in the separation stroke as the secondary goal,the genetic algorithm optimization toolbox is used for multi-objective optimization design of the diaphragm spring The comparative analysis obtains the optimization results and determines the optimal structural parameters.(5)Analyze the optimized joint performance and separation performance of the diaphragm spring in a high temperature environment,and verify the optimization results.Based on the engine speed and frequency,a modal analysis is performed on the optimized diaphragm spring to verify whether it will resonate with the engine.