Theoretical modeling and numerical simulation of dynamic contact characteristics of a spherical pump with variable friction coefficient

Guan, Dong; Li, Jing; Han, Xue; Wang, Lihui; Gong, Junbo

doi:10.1177/13506501211016201

Cited by 1 publication

(1 citation statement)

References 28 publications

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“…Axial piston pumps are widely used in hydraulic systems because of their compact structure and high pressure [1][2][3]. However, the inherent overturning movement [4,5] of the axial piston pump and the three major sliding friction pairs [6][7][8] cause leakage and other problems during operation [9,10].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Mechanical Efficiency Models for 2D Piston Pumps with a Stacked Taper Roller Set

et al. 2022

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Since the clearance between the guide rail and the roller reduces the efficiency of the 2D pump, this paper proposes a novel 2D piston pump with stacked taper roller sets to eliminate the effect of the clearance. The structure of the 2D pump is introduced, and the mathematical model of the torque and the mechanical efficiency of the bilateral force on the guide rail are established and analyzed. The model takes into account the change in the oil viscosity, the spatial angle and the oil churning loss. A test rig was built to test the mechanical efficiency under different operating conditions. The unilateral and bilateral force models of the guide rail were compared, which proved that the bilateral force model of the guide rail can predict the mechanical efficiency more accurately than the unilateral force model. In the case of high load pressure, there was a clearance between the test results and the model calculation results. It is speculated that the main reason for this is that the greater oil pressure causes the size of the contact area between the two taper rollers and between the taper roller and the guide rail to become larger. The resulting rolling friction coefficient becomes larger, which affects the mechanical efficiency.

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