Study On Structural Strength Of High Pressure Plunger Pump Based On Multi Physical Field Coupled Analysis

With the rapid development of the diesel engine,the pressure of the fuel injection is also increasing,and high-pressure plunger pump is the core of the hydraulic pressure power even the whole hydraulic system,it has the advantages of compact structure,high working pressure,and it could still maintain a high efficiency when it works.In this paper,the structural strength of multi physical fields coupling analysis of high-pressure plunger pump was studied by using the finite element software and loose coupling method,it proposed a systematic method for the study of the system.The works done in this paper are listed as below:?The fluid dynamics analysis of the unit pump in the pumping process.At first,fuel fluid dynamics model was established by using Hypermesh.Then the model was imported into the Fluent software,according to the conditions and parameters were given,the change of oil pressure was calculated,then oil pressure distribution was obtained.?Fluid-solid coupling structure strength analysis of plunger matching parts.Plunger and plunger sleeve structure finite element model was established by using Hypermesh.Then The maximum fluid pressure distribution data of plunger and plunger sleeve was outputted from the fluid dynamics calculation results above,then it was imported into the Abaqus software and mapped on the solid finite element model,The stress and deformation of the plunger matching parts were calculated.?Structural mechanics analysis of cam,roller and roller pin motion combination.First of all,the oil pressure time curve of plunger was imported into multi-body dynamics software Adams to simulate the multi-body dynamics.Secondly,according to the calculation results,the force of the roller pin to roller is extracted,and the static analysis of the cam and roller was carried out by using the Abaqus software.Next according to the calculation results,the force between the cam and roller was extracted,then the static analysis of the roller and roller pin was carried out by using the Abaqus software.Then the Archard abrasion equation is established to make a simple estimate of the abrasion of the cam in a cycle,which provides a theoretical basis for the design of the cam's abrasion resistance.Last according to the calculation results,the force of the cam to the roller is extracted,and the static analysis is carried out byusing the Abaqus software.?Electromagnetic force analysis of solenoid valve.Using Ansoft Maxwell software to establish the electromagnetic valve model and calculate the change of the electromagnetic force in a cycle.?The electromagnetic and liquid-solid coupling dynamic analysis of Bypass valveThe finite element model of bypass valve,bypass valve set,spring plate,armature and screw were established by using Hypermesh.Then fluid pressure distribution data of bypass valve was imported into solid finite element model according the fluid dynamics results above,then the electromagnetic force by calculating with Maxwell was the loading condition,so dynamic mechanical analysis of bypass valve was made in the closing and pumping process.This article is not only considering the impact of fluid to solid,also analyzing the cam and roller by using multi-body dynamics simulation,and comparing with classical algorithm of contact stress,and making dynamic analysis of bypass valve in the opening,pumping and closing processes,systematically for the key parts in the oil pump are analyzed in the complete,also putting forward a train of thought for other similar oil pump analysis.