Optimization design of the inner radius of the sealing surface of slipper

Wang, Qian-nan; Xu, Bing; Zhang, Junhui

doi:10.1109/aim.2015.7222563

Cited by 3 publications

(8 citation statements)

References 15 publications

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“…Notice that the film thickness exists some differences at different rotational angles of shaft. This phenomenon can be explained that overturning movement of slipper can bring out the variation of film thickness, which is verified by previous studies . If the slipper is located in the suction pressure zone of the pump, ie, the shaft angle of 240° and 320°, and the overturning movement of slipper is more significant.…”

Section: Resultssupporting

confidence: 74%

“…Thus, the pocket pressure and the case drain pressure determine the pressure boundary of the fluid film. The pocket pressure is expressed as follows:

\frac{π d^{4}}{128 italicμl} ((), p_{p} - p_{s}) = \int_{0}^{2 π} \int_{0}^{h} v_{r} italicRdθdz

where d is the diameter of the orifice, l is the length of the orifice, and v r is the fluid velocity along the radial direction.…”

Section: Thermoelastohydrodynamic Modelmentioning

confidence: 99%

“…Thus, the pocket pressure and the case drain pressure determine the pressure FIGURE 1 External forces applied on the slipper boundary of the fluid film. The pocket pressure is expressed as follows 11 :…”

Section: Reynolds Equationmentioning

confidence: 99%

“…This phenomenon can be explained that overturning movement of slipper can bring out the variation of film thickness, which is verified by previous studies. 11 If the slipper is located in the suction pressure zone of the pump, ie, the shaft angle of 240°and 320°, and the overturning movement of slipper is more significant. And similarly, the variation trends of film thickness are identical with increasing the number of grids.…”

Section: Grid Sensitivity Analysismentioning

confidence: 99%

“…Further research led to the incorporation of the elastohydrodynamic (EHD) effect, also known as EHD. Wang et al evaluated oil film characteristics, dynamic stiffness, and minimum power loss of slipper pair with consideration of tilting angle and the slipper spin effects, and it is found that there is the optimum inner radius of sealing surface that maximizes load‐carrying capacity of hydrostatic thrust bearings. Wang and Yamaguchi developed a two‐dimensional EHD model of the hydrostatic bearing in a water hydraulic axial pump considering surface elastic deformation.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Resultssupporting

confidence: 74%

“…Thus, the pocket pressure and the case drain pressure determine the pressure boundary of the fluid film. The pocket pressure is expressed as follows:

\frac{π d^{4}}{128 italicμl} ((), p_{p} - p_{s}) = \int_{0}^{2 π} \int_{0}^{h} v_{r} italicRdθdz

where d is the diameter of the orifice, l is the length of the orifice, and v r is the fluid velocity along the radial direction.…”

Section: Thermoelastohydrodynamic Modelmentioning

confidence: 99%

Section: Reynolds Equationmentioning

confidence: 99%

Section: Grid Sensitivity Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Tang

Ren

Xiang

2019

Lubrication Science

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A Mixed Lubrication Model for Predicting the Lubrication Performance Degradation Behavior of Slipper Pair in Early Wear Failure

Liu,

Li,

Sun

et al. 2023

IEEE Access

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To reveal the lubrication performance degradation mechanism of the slipper pair in the highpressure piston pump during early wear failure. The three-dimensional fractal function has been used to construct the surface morphology of the slipper, and combined with the oil film thickness equation to establish a mixed lubrication model of the slipper pair considering the microscopic change of the surface during the wear process. Based on the fractal theory, a method using fractal parameters (fractal dimension D and scale coefficient G) to describe the surface morphology change during the wear process is proposed. The variation of surface morphology, oil film thickness and pressure distribution of the slipper during wear degradation process are discussed, and the effect of wear depth on the degradation laws of leakage and oil film supporting force are analyzed. Finally, the wear degradation state simulation test of the slipper pair is carried out. The information on surface morphology, oil film thickness and leakage during wear process is recorded for the verification of the theoretical model. The proposed model can lay a theoretical foundation for accurately evaluating the performance degradation of the slipper pair and improving the fault prediction and predictive maintenance level of high-pressure piston pumps.INDEX TERMS Early wear, failure prediction, lubrication characteristics, piston pump, slipper pair.

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Effects of surface roughness on the mixed thermal elstohydrodynamic lubrication characteristics of surface textured slipper bearing in axial piston pump

Tang

Ren

Kumar

2022

Proceedings of the Institution of Mechanical Engineers, Part J:

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In this paper, a mixed thermal elstohydrodynamic lubrication model is presented for the rough textured slipper bearing in axial piston pump. The autocorrelation function is employed to reveal more detailed information about the tribological performance of the rough textured surfaces in terms of the Skewness and Kurtosis effects and the viscosity change. The effects of surface texturing is represented by the combined root mean-square roughness and asperity height on the optimum texture parameters under the mixed lubrication condition. It is shown that Kurtosis and Skewness have significant effects on the contact performance under different rotational speeds. The optimum dimple depth-over-diameter ratio under mixed lubrication condition are determined at maximized load-carrying capacity and minimized friction coefficient.

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Optimization design of the inner radius of the sealing surface of slipper

Cited by 3 publications

References 15 publications

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

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

A Mixed Lubrication Model for Predicting the Lubrication Performance Degradation Behavior of Slipper Pair in Early Wear Failure

Effects of surface roughness on the mixed thermal elstohydrodynamic lubrication characteristics of surface textured slipper bearing in axial piston pump

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