Dynamics And Fatigue Life Analysis Of Diesel Engine Feed CAM Mechanism

With the rapid development of science and technology,the structure of diesel engines has become more complex,and the functions have become more complete.The fuel supply cam in the locomotive diesel engine is the core part of the diesel engine.During the working process,periodic contact stresses will be generated on the cam surface.The wear of the fuel supply cam not only accounts for a considerable proportion of the friction loss of the entire machine,but also plays a vital role in the entire fuel supply system.It is related to the stability and reliability of the entire fuel supply mechanism and the reliability of the entire machine will have an impact.Therefore,an effective analysis of the fuel supply cam is helpful to improve the overall efficiency and reliability of the cam fuel supply mechanism,and is of great help to the improvement of the efficiency and reliability of the diesel engine.Based on ADAMS and ANSYS Workbench software,this paper studies the dynamic characteristics of the cam fuel supply mechanism of a certain locomotive diesel engine through the method of simulation calculation.At the same time,based on this,the service life is analyzed and researched for related maintenance.The formulation of the system provides an important reference.And according to the specific force situation of the cam surface,an optimized solution is proposed.Firstly,Creo software is used to establish three-dimensional solid models of the components of the fuel supply cam mechanism,and a virtual prototype is established through ADAMS.The rigid body dynamics analysis of the cam mechanism is carried out,and the movement law of the follower and the force on the contact surface of the cam wheel Analyze,and then perform modal analysis on the camshaft through Workbench.In order to make the analysis result closer to the actual situation,this paper has carried out a softening treatment on the camshaft,and then imported the processed model into ADAMS for rigid-flexible coupling dynamic analysis,and compared the analysis results before and after.Then,based on the results of dynamic analysis,the stress distribution on the cam surface was analyzed in Workbench,the force distribution on the cam surface under different working conditions was compared,and the fatigue life analysis of the cam surface was performed using the Ncode Designlife module.Finally,combined with the force situation at the contact point,the shape of the cam roller contact point is optimized and analyzed.