Co-simulation Research Of PCY14-1B Constant-pressure Variable Displacement Axial Piston Pump Based On Adams And Amesim

Hydraulic pump is one key and the power source of the whole hydraulic system. The constant pressure variable displacement axial piston pump is also a volumetric flow-control system. When the pump working in the constant pressure condition, it can provide flow below the maximum flow according to the needs of the system. Then the oil discharging from the relief valve could be reduced. The pump can adapt to the load demand automatically and obtain ideal energy-saving effect. So it is very popular in current days because more and more people have energy-saving ideas, and the research on this pump is also increasing.This article mainly adopted the method of combining the theoretical analysis and computer simulation to study the pressure-compensated pump.The working principles and variable methods were fully understood, the research status at home and abroad were introduced briefly, and the dynamic characteristics of the constant pressure valve, the swash plate and some others were analyzed theoretically.The ADAMS and AMESim models of the pump were established separately. In the third chapter, the process of building the ADAMS model was expounded in detail, including the ADAMS dynamics theory and practical modeling steps. After finishing the model, we selected the retainer plate as research object, found the motion law and stress areas by the simulation of the virtual prototype model. Then the retainer plate was translated into flexible body, so we could know the stress distribution clearly, that may provide amounts of data for improving the structure of the plate.In the process of establishing the AMESim model of the constant pressure pump, the methods of integrating and assembling were adopted. The variable-displacement device model, torque model, piston model, slipper pair model, distributing flow pair model, and the system load model were built in AMESim and we explained the calculation and setting methods of the main parameter. These models were assembled together to form a comprehensive pump model. Then we studied the relationships between the working law of the variable displacement device and some factors like the load, spool mass, spring stiffness, the ratio of the variable piston large and small end diameter.Combining ADAMS and AMESim, we finished the co-simulation model which ADAMS was the master for the first time. The problem of interface setting was solved. The co-simulation model was proved to be correct by comparing the data between ADAMS and AMESim model. In the simulation process, the data of two models was synchronized, such as the angle of swash plate in ADAMS always changed with the data from AMESim. And then the set pressure of variable-displacement device was changed to different value to get the relationships between the outlet pressure, outlet flow, piston cavity pressure, piston leakage, piston pair friction and some others and the set pressure.