A time-varying reliability-based robust design method considering overall efficiency of axial piston pump

Du, Zunling; Zhang, Yimin

doi:10.1177/1748006x211066146

Cited by 3 publications

(2 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This confirms that compared to the Poiseuille flow, the centrifugal flow is negligible for the leakage calculation of axial piston pumps. 14 In addition, the leakage on the suction side is negligible compared to that on the discharge side. Therefore, the pump's total leakage flow rate is approximately equal to the Poiseuille flow rate on the discharge side.…”

Section: Resultsmentioning

confidence: 99%

“…Geng et al 13 assumed constant gap heights in all tribological interfaces and considered their leakage flows as pressure-induced flow (Poiseuille flow) and velocity-induced flow (Couette flow). Du and Zhang 14 considered piston tilt in the leakage model for piston/cylinder block interface. Meng et al 15 and Bergada et al 16 included the tilting motions of slippers and cylinder block in leakage models but their tilting angles needed to be assumed constant for analytical solution.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

New analytical leakage models for tribological interfaces in axial piston pumps

Chao

Shao

Liu

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

Axial piston pumps act as the power source in hydraulic systems and their volumetric losses mainly arise from leakage of tribological interfaces. The leakage of tribological interfaces was often modeled as a simple mixture of pressure-induced flow and velocity-induced flow in previous studies. However, few studies have clarified the contribution of discharge pressure and rotational speed to the leakage flow. This work considers both pressure and velocity factors and establishes new analytical models for the leakage of tribological interfaces from Navier-Stokes equations. Experiments were performed on an actual axial piston pump to measure its leakage flow rates at different discharge pressures and rotational speeds. Results show that the total pump leakage excludes Couette flow and only includes Poiseuille and centrifugal flows. The Poiseuille flow predominates the pump leakage while the centrifugal flow contributes little to the pump leakage.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

New analytical leakage models for tribological interfaces in axial piston pumps

Chao

Shao

Liu

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

show abstract

Experimental investigation and theoretical evaluation on the leakage mechanisms of seawater hydraulic axial piston pump under sea depth circumstance

et al. 2022

Engineering Failure Analysis

View full text Add to dashboard Cite

Research on Prediction Methods for Eccentric Wear of the Slipper Pair in Axial Piston Pumps and Lubrication Performance Analysis

Du,

Zhang,

et al. 2024

Journal of Tribology

View full text Add to dashboard Cite

The axial piston pump (APP) is the core power component of hydraulic systems. Its friction-pair wear can cause the degradation of piston pump performance until the function is completely lost or the service life is terminated. The slipper pair, prone to wear failure, is selected as the research object. The prediction method for the eccentric wear of the slipper pair is established, and the gradual change rules of the performance with wear accumulation are explored. Based on the elastohydrodynamic lubrication model of the slipper pair, the micro-surface rough peak contact and the stress state of the slipper pair are analyzed, and the mixed lubrication model of the slipper pair is established. Based on two-body abrasive wear and Archard adhesive wear models, grid discretization of a sealing belt of the slipper pair is carried out to improve the prediction method for eccentric wear of the slipper pair. The effectiveness of the proposed method is verified by a surface morphology analysis of the worn slipper. The results showed that the wear depth and wear width of the outer edge of the slipper bottom surface are positively correlated with the oil discharge pressure and the inclination angle of the swashplate, and negatively correlated with the rotational speed and the dynamic oil viscosity. The outer edge of the slipper is wedged after eccentric wear, and the hydrodynamic effect of the lubricating oil film of the slipper pair is enhanced. Hence, proper wear can improve the lubrication performance of the slipper pair.

show abstract

A time-varying reliability-based robust design method considering overall efficiency of axial piston pump

Cited by 3 publications

References 33 publications

New analytical leakage models for tribological interfaces in axial piston pumps

New analytical leakage models for tribological interfaces in axial piston pumps

Experimental investigation and theoretical evaluation on the leakage mechanisms of seawater hydraulic axial piston pump under sea depth circumstance

Research on Prediction Methods for Eccentric Wear of the Slipper Pair in Axial Piston Pumps and Lubrication Performance Analysis

Contact Info

Product

Resources

About