Analysis of piston behavior according to eccentricity ratio of disk in bent-axis type piston pump

Abstract

To improve the performance of the bent-axis type axial piston pump driven by the tapered piston, it is necessary to know the driving characteristics and mechanism of the tapered piston and the cylinder block. Since each piston not only rotates on its axis and reciprocates in the cylinder bore but also revolves around the axis of the driving shaft, it is difficult to analyze the driving mechanism theoretically. The theoretical mechanism for the bent-axis type axial piston pump is studied by using the geometrical method. The driving range of the tapered piston is determined by theoretical equations. The results show that the cylinder block is driven by one tapered piston in a limited range and the core parameters such as the tilting angle of the piston and the ahead delay angle influence performance of the bent-axis type axial piston pump.

The Influence of Complex Piston Movement on the Output Flow Rate of a Hingeless Bent-Axis Axial Piston Pump

“…South Korean scholars, including Beak, have utilized geometric approaches to investigate the performance characteristics of inclined-axis pumps, elucidating the kinematic principles of conical piston-driven cylinder motion and delineating the operational scope of conical piston drives. Experimental validations have confirmed the significant impact of the piston inclination angle and the phase angle between the piston assembly and the cylinder on the performance of inclined-axis pumps [1,2]. Researchers such as Hong have concentrated on the frictional losses within inclined-axis pumps through mathematical theory, with the goal of pinpointing the primary factors affecting output torque.…”

“…also delved into the lubrication properties of a conical piston ring, observing that the thickness of the oil film between the piston ring and the cylinder is increased with an increasing rotational speed but remains largely unaffected by the pump's outlet pressure. Conversely, the frictional force between the piston ring and the cylinder escalates with both rotational speed and pump outlet pressure [1,7]. Simulation studies and experimental validations on the flow pulsation characteristics of inclined-axis axial piston pumps were also undertaken by Professor Jung J.Y.…”

Response Characteristics Analysis and Optimization Design of Load Sensing Variable Pump

“…In recent years, the virtual simulation technology has been applied to the development of hydraulic pump and made some valuable achievement [5,6]. Cho et al [7,8] used the AMESim software to establish the virtual simulation model of a bentaxis type piston pump and analyzed the pressure ripple characteristics and the piston behavior according to eccentricity ratio of the disk. Bergada et al [9] studied axial-piston pump leakage and output flow ripples based on the dynamic characteristics of the pump.…”