The Simulation Analysis Of Collision Interference On Retainer Plate Of Axial Piston Pump And Its Structure Optimizing Design

There are all kinds of faults that cause the piston pump to not work properly during the operation of the axial piston pump,there are many reasons for the fault of the piston pump.Including,the oil extraction is insufficient or no hydraulic oil output at the outlet of the pump;there is still hydraulic oil output when the angle of swash plate is zero;the output pressure of the pump is abnormal;what`s more,larger vibration and noise produced in pump.The fault of the retainer plate is also one of the reasons,when serious wear or even rupture occurs at the hole of the retainer plate,it will have the severe impact on the operation of the piston pump.This article is based on the collision interference theory and kinematics analysis of the retainer plate and the slipper,then,the factors influencing the degree of collision interference in contact between the two are obtained.Further,the simulation software is used to analyze these influencing factors,the change rule of collision interference degree under these influence factors is obtained.On this basis,the structure of the retainer plate is improved,original retainer plate and improved retainer plate are compared and analyzed.The following is the main content:In the first two chapters,the current research contents of the piston pump and the retainer plate are summarized.By studying the multibody dynamics of ADAMS,contact problems and collision interference theory,they are analyzed in depth.In the third chapter,the theory and simulation are combined,the contact condition and the degree of collision interference between the drill of the retainer plate and the neck of the slipper are analyzed.The kinematics of the slipper and the retainer plate are analyzed.By the equivalent substitution method,the degree of collision interference is equivalent to loss of kinetic energy.Combining the two,the factors that affect the degree of collision interference are analyzed,then the model of the piston pump is built in ADAMS and the simulation is carried out,then the contact law between the drill of the retainer plate and the neck of the slipper is obtained,including the contact position and specific contact situation.On the basis of this,the effects of spindle speed,angle of swash plate and number of odd and even piston on the degree of collision interference are studied and analyzed.By changing the size of the retainer plate,including the difference of circular diameter and the difference of the diameter of the drill hole(the retainer plate and the slipper fit gap)in the retainer plate,the effects of different retainer plate sizes on the degree of collision interference are analyzed.The variation of the rotation angle velocity of the slipper and the rotation angular velocity of the retainer plate with time are compared and analyzed.In the fourth chapter,in order to reduce the degree of collision interference between the neck of slipper and the hole of the retainer plate.In accordance with the size of the model used in this article,and based on the study of the third chapters,the structure of the retainer plate is improved.The constant pressure pump model is established in AMESim,then the data interface of AMESim and ADAMS are set,an integrated model of ADAMS and AMESim have been established.Change the structure of the retainer plate only in ADAMS,original retainer plate and improved retainer plate are co-simulated in a constant pressure pump.The degree of collision interference between them are compared.And the changes of rotational speed with time are compared and analyzed,the contact conditions between the drill hole and the neck of the slipper are compared and analyzed.Finally,the variation of the center of mass of the improved the retainer plate with time is analyzed,the effect of the improved structure on the stability of the retainer plate is obtained.