Dynamic Contact Analysis of the Piston and Slipper Pair in Axial Piston Pump

Abstract

The dynamic analysis model of axial piston pump was established; both the kinematics and dynamics simulation analysis were conducted by virtual prototyping approach. The displacement, velocity, acceleration and stress curves of the piston under different working conditions were investigated. In addition, a ball-in-socket contact model was established, and the effects of hydraulic pressure, piston radius and radial clearance on normal displacement, contact radius, maximum contact pressure, normal contact stiffness and tangential contact stiffness were analyzed comprehensively. The results indicate that the normal displacement, maximum contact pressure, contact radius, normal contact stiffness and tangential contact stiffness can be improved by enlarging the piston radius and decreasing the radial clearance.

Lubrication characteristics analysis of slipper pair of digital valve distribution axial piston pump

“…Calculate the partial derivative of equation (11), and the change rate of oil film thickness at any point can be obtained as follows:…”

“…The valve distribution axial piston pump is that the swashplate rotates while the cylinder does not move, and the most direct difference for the stress of the slipper pair is that the centrifugal force is eliminated. 11,12 How to improve oil film lubrication characteristics of slipper pair of axial piston pump is a difficult point in this field. 13–15…”

“…The valve distribution axial piston pump is that the swashplate rotates while the cylinder does not move, and the most direct difference for the stress of the slipper pair is that the centrifugal force is eliminated. 11,12 How to improve oil film lubrication characteristics of slipper pair of axial piston pump is a difficult point in this field. [13][14][15] In the research field of digital valve distribution piston pump, Huang et al 16 theoretically analyzed the dynamic performance of the distribution valve of hydraulic piston pump, and studied the distribution characteristics and influencing factors of the pump through simulation.…”

Calculation of the actuator system in swash plate axial piston machines by a coupled multibody and TEHL simulation

“…By varying the diameters and guide lengths, as well as the contour of the edges, the total losses for specific piston strokes were reduced. A multibody dynamics model of an axial piston pump was presented by Shen et al 25 In addition to the piston/cylinder contact, the spherical contact between the piston and the slipper pad was also considered in this work. The results show that increasing the piston radius and decreasing the radial clearance improve the loading conditions.…”

Hydrostatic Bearing Characteristics Investigation of a Spherical Piston Pair with an Annular Orifice Damper in Spherical Pump

“…The hydrostatic bearing consists of a fluid layer between two surfaces, whose purpose is to avoid direct surface-to-surface contact [1][2][3][4][5][6]. Generally, hydrostatic bearings are utilized in heavy equipment, to carry large loads between two surfaces that are moving relative to each other at a low speed [4].…”