Stress Analysis Of Injector Parts Of 16V240ZJB Diesel Engine

In recent years,diesel engines have developed towards higher intensity and low emissions,and the requirements for diesel engines in terms of power and reliability are gradually increasing.The working conditions of diesel engine injector parts are more demanding,and the problem of strength has become particularly important..The stress and deformation of diesel fuel injectors such as needle valve,needle valve body,seat plate and pressure regulating nut under the action of periodic pressure will greatly affect the working performance of the fuel injector;fuel injection during combustion The force and deformation of components such as the engine will directly affect the performance of the diesel engine.Therefore,the needle valve assembly and other parts in the injector should have sufficient strength.In this subject,the finite element strength analysis is carried out on the main parts of diesel engine injectors and related components.On the basis of mastering the relevant knowledge of 16V240 ZJB diesel engine injectors,Creo software is mainly used to draw three-dimensional models of needle valves,needle valve bodies and other parts,and detailed modal analysis of the models.All parts are in normal working conditions Resonance can be effectively avoided,and the Hypermesh software is used to assist in mesh refinement.After determining and calculating the load boundary conditions,the strength analysis is carried out with Ansys Workbench software.The results show that the main load on each component of the injector is pulse Load.Analyzing the deformation of each part under working conditions,the results show that the deformation is mainly concentrated in the contact between the needle valve and the needle valve body.At the same time,under the working condition of maximum oil supply pressure,the maximum stresses of the seat plate,compression nut,needle valve body and needle valve are 294.66 Mpa,102Mpa,586 Mpa and 401.2Mpa,respectively.The results show that the stress is concentrated at the contact point between the needle valve and the needle valve body.In the end,at the needle valve where the stress and deformation are concentrated,based on the Kriging proxy model,an optimization algorithm is established by combining Ansys parameterized language and MATLAB intelligent optimization control algorithm.While ensuring that the design constraints of the original structure are strictly unchanged,The optimization analysis for the maximum equivalent stress and maximum deformation of the injector has been completed.The optimized maximum equivalent stress is reduced by 18.69%;the optimized maximum deformation is reduced by 6.12%,and the optimization effect is obvious.It can better lay the foundation for stress analysis and optimization in actual engineering in the future.