Data Analysis on Dynamic Flow Characteristics of Variable Delivery Hydraulic Axial Piston Pump

This study endeavors to explore the dynamic flow attributes of variable delivery hydraulic axial piston pump (VAPP) and assess the impact of turning speed on pressure pulsation and flow ripples. The variable output of VAPP is achieved by varying the swash plate angle. The MATLAB/Simulink platform is utilized to establish a simulation model for the VAPP, enabling the prediction of the dynamic flow properties of the VAPP. Through an investigation, we have observed that pump output pressure and flow rates can be significantly increased with the increase in rotational velocity, and at the same time, pressure pulsation and flow ripples depict a decreasing trend. This highlights the significant role played by rotational speed in modulating the performance of the VAPP, resulting in improved fluid delivery while minimizing undesirable pressure fluctuations and flow disturbances. A computational study was conducted to simulate the dynamic flow behavior of a 7-piston Variable Axial Piston Pump (VAPP). The simulation results revealed that, at an operational speed of 3000 revolutions per minute (rpm), the VAPP exhibited a coefficient of flow ripple of 0.79 and a coefficient of pressure pulsation of 0.9. These values represent a significant improvement over the neighboring operational speed of 2484 rpm, which yielded an average coefficient of flow ripple of 1.63 and a coefficient of pressure pulsation of 1.19. Based on these findings, it can be inferred that the proposed model surpasses existing solutions by effectively reducing vibrations and enhancing the dynamic performance of the VAPP.