Tribo-dynamic model of slipper bearings

Lin, Shuo; Hu, Jibin

doi:10.1016/j.apm.2014.06.009

Cited by 38 publications

(19 citation statements)

References 21 publications

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“…A more precise way is via using the 2D Reynolds equation of lubrication (Xu et al, 2013;Mizell and Ivantysynova, 2014;Wegner et al, 2014;Lin and Hu, 2015). Pistons in some pumps often have several grooves cut along the axis in order to increase stability, decrease friction, and reduce lateral forces.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of volumetric losses and efficiency of axial piston pump with respect to displacement conditions

Zhang

et al. 2016

JZUS-A

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Abstract:A good efficiency performance of a pump over a wide range of displacement conditions is crucially important for variable pump control systems to save energy. However, according to the literature, less attention has been paid to the understanding of the efficiency, leakage flow, and compression flow characteristics of the pump with respect to displacement conditions. In this study, a test bench was built, and a novel explicit volumetric loss model was proposed to investigate these problems. The overall efficiency is found to drop considerably with the decreasing displacement. The volumetric losses range from 13% to 47% of the total power losses of pump at the rated speed, under the conditions of pressure ranging from 5 to 35 MPa and displacement ranging from 13% to 100% of full displacement. The highest proportion of compression flow losses in the total volumetric losses of pump at the rated speed can reach up to 41% when the pressure and displacement are greater than 30 MPa and 88% of full displacement, respectively; after that, the proportion gradually decreases with decreasing displacement. However, the leakage flow generally increases with decreasing displacement, or may decrease first and begin to increase after the minimum with the further decrease of displacement. In the components of leakage of slipper/swash plate pair, the squeeze leakage is found to reach a magnitude equal to that of the Poiseuille leakage. The findings can guide the further research and design of pumps with better efficiency performance.

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Section: Introductionmentioning

confidence: 99%

Characteristics of volumetric losses and efficiency of axial piston pump with respect to displacement conditions

Zhang

et al. 2016

JZUS-A

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“…Jeong et al and Vatheuer et al analysed the kinematic relation of the plunger in the plunger holes and established a mathematical model for the instantaneous friction force of the plunger pair and the average torque loss [11,12]. Lin et al established a dynamic friction model for the slipper pair and analysed the effects of pump shaft rotating speed, load force and oil viscidity on the performance of the slipper [13].…”

Section: Introductionmentioning

confidence: 99%

Friction and wear analysis of the external return spherical bearing pair of axial piston pump/motor

Deng

Wang

et al. 2020

Mechanics & Industry

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By discretizing the contact area between the external retainer plate and the external spherical hinge, a mathematical model for the force relation of an arbitrary contact point in the external return spherical bearing pair was established and a mathematical expression for the friction power of the external return spherical bearing pair was deduced. The influences of the slant inclination of the external swash plate, pump shaft rotating speed, eccentricity, spring force and number of discrete contact points on the friction power were also analysed. The results show that the power fluctuation amplitude of the discrete contact point in the external return spherical bearing pair increases with increasing slant inclination of the external swash plate, pump shaft rotating speed and spring force; the total friction power was found to increase linearly. However, the power fluctuation amplitude of the discrete contact point in the external return spherical bearing pair was found to decrease with increasing eccentricity, with the total friction power decreasing nonlinearly until reaching a certain value. The distribution shape of the friction power of the discrete contact point is only affected by eccentricity. If the eccentricity is large, the friction power of the discrete point presents a double-peak distribution, whereas if it is small, a multiple-peak distribution is observed.Keywords: Axial piston pump/motor / external return mechanism / friction power / normal force / spherical bearing pair *

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“…The influence of load pressure and shaft rotational speed on the TEHD lubrication characteristics illustrated that the EHD pressure should be balanced against the oil film temperature and pressure in an optimized design of the slipper structure parameters. In recent years, Lin et al developed a tribo‐dynamic model of the slipper bearing in an axial piston pump and applied the genetic algorithm approach to predict the lubrication behaviour of the slipper pair. Moreover, the TEHD problem is more complex in a slipper pair, and the interactive computation between TEHD deformation and HD pressure was analysed using the finite element method .…”

Section: Introductionmentioning

confidence: 99%

Power loss characteristics analysis of slipper pair in axial piston pump considering thermoelastohydrodynamic deformation

Tang

Ren

Xiang

2019

Lubrication Science

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The power loss characteristics of slipper pair in an axial piston pump considering the thermoelastohydrodynamic deformation are investigated based on a transient power loss model. The simulation results indicate that the leakage power loss of the slipper pair increases with increasing the thermoelastohydrodynamic deformation. The viscous friction power loss decreases with an increase in the thermoelastohydrodynamic pressure. The viscous friction becomes sufficiently large under the influence of slipper surface roughness that it leads to an increase in viscous friction power loss. The pump displacement decreases with increasing the leakage rate and results in higher leakage power loss and higher friction power loss. To achieve minimum power loss in the slipper, an objective optimization study using Newton's method is applied to calculate structural parameters such as slipper inner diameter, slipper outer diameter, and orifice diameter. The proposed structural parameter optimization can be used as theoretical evidence for slipper pair design.

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Tribo-dynamic model of slipper bearings

Cited by 38 publications

References 21 publications

Characteristics of volumetric losses and efficiency of axial piston pump with respect to displacement conditions

Characteristics of volumetric losses and efficiency of axial piston pump with respect to displacement conditions

Friction and wear analysis of the external return spherical bearing pair of axial piston pump/motor

Power loss characteristics analysis of slipper pair in axial piston pump considering thermoelastohydrodynamic deformation

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