To mitigate cavitation in high-speed axial plunger pumps,a specific type of axial piston pump was focused on.Utilizing Pumplinx software,a CFD simulation model was developed to investigate the impact of varying speeds and suction port pressures on cavitation levels.The discrete simulation results were then analyzed using MATLAB software,yielding curves illustrating the relationships between speed,suction port pressure,and suction efficiency.The findings indicate the following:when the gas volume in the plunger cavity exceeds 12%,the oil suction efficiency of the plunger pump diminishes,potentially leading to failure in oil absorption; elevating the pressure at the suction port proves effective in reducing cavitation within the plunger cavity,consequently enhancing the oil suction efficiency of the pump; to ensure normal oil absorption and high efficiency within the range of 5 000 r/min to 6 000 r/min,maintaining the suction port pressure between 0.25 MPa and 0.30 MPa is recommended.Within this pressure range,the cavitation degree and oil absorption efficiency of the plunger cavity remain relatively stable.