Research on flow and pressure ripple reduction of axial piston pump based on optimized damping groove

The axial piston pump is widespread, owing to its compact size and high efficiency, but the vibration and noise within the pump limit its performance. Under specific operating conditions, flow and pressure ripples are considered as the primary sources of vibration and noise. Furthermore, flow and pressure ripples are readily influenced by the damping groove structure. In contrast to the standard triangular damping groove, this paper proposes an optimized damping groove to mitigate the flow and pressure ripples. Although optimized grooves have been used in commercial axial piston pumps, their benefits in terms of flow characteristics have not been clearly delineated. In this study, the theoretical area of passage of the damping groove was investigated. In addition, to compare and optimize the flow field characteristics of the groove and the triangular groove, a computational fluid dynamics (CFD) pattern was established. To ensure the precision of the CFD model, a test platform was also constructed. The results of the CFD simulation indicate that, compared with the standard triangular groove, an optimized groove can significantly reduce the flow and pressure ripples under various operating conditions.