Multibody dynamics of pivot slipper pad thrust bearing in axial piston machines incorporating thermal elastohydrodynamics and mixed lubrication model

Hashemi, S. M. R.; Kroker, Andreas Markus; Bobach, Lars; Bartel, Dirk

doi:10.1016/j.triboint.2015.12.009

Cited by 55 publications

(33 citation statements)

References 16 publications

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“…The fluid is heated by fluid friction, whereas the heat conduction acts as a heat sink and decreases the temperature increase in the fluid. The transient energy equation for the liquid film that ignores compression and radiation is expressed as [25][26][27][28][29] FIG. 7.…”

Section: Mathematical Model and Simulation Of Temperaturementioning

confidence: 99%

The effect of energy accumulation and boundary slip on laminar flow between rotating plates

Zeng

Chen

et al. 2018

AIP Advances

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The poor operating conditions of fluid lubrication equipment during the start-up process are due to the resistance of the high-viscosity lubricating liquid. Moreover, the excessive reduction in fluid viscosity due to the elevated temperature resulting from power consumption during prolonged operation is not conducive to the generation of dynamic pressure. In this study, we examine the effect of energy accumulation and boundary slip on the laminar flow of a liquid between a pair of rotating plates. The experiments are conducted using a rotary rheometer, with polymethyl methacrylate (PMMA) as the thermal insulation material and polytetrafluoroethylene (PTFE) as the slip drag reduction material, and a three-dimensional simulation model is established. This model is derived by combining the energy equation including the slip length and the heat conduction equation. Thus, the temperature changes over time are predicted by this model, and the model accuracy is verified by experiments. The results reveal the following points: 1) boundary slips function as a drag reduction mechanism for short-time continuous operation; 2) under prolonged operation, the slip reduces the extent of the oil viscosity decrease and clear control of the elevated temperature by the boundary slip is observed.

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Section: Mathematical Model and Simulation Of Temperaturementioning

confidence: 99%

The effect of energy accumulation and boundary slip on laminar flow between rotating plates

Zeng

Chen

et al. 2018

AIP Advances

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“…Most recently, several fully coupled fluid-structure-thermal models have also been proposed, such as Ref. [14] studied the multi-body dynamics considering the mixed lubrication model, Ref. [15] presented a transient thermoelastohydrodynamic lubrication model and Ref.…”

Section: Introductionmentioning

confidence: 99%

Experimental Research on the Dynamic Lubricating Performance of Slipper/Swash Plate Interface in Axial Piston Pumps

Zhou

Jing

2020

Chin. J. Mech. Eng.

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The interface between the slipper/swash plate is one of the most important frication pairs in axial piston pumps. The test of this interface in a real pump is very challenging. In this paper, a novel pump prototype is designed and a test rig is set up to study the dynamic lubricating performance of the slipper/swash-plate interface in axial piston machines. Such an experimental setup can simulate the operating condition of a real axial piston pump without changing the relative motion relationship of the interfaces. Considering the lubricant oil film thickness as the main measurement parameter, the attitude of the slipper under the conditions of different load pressure, rotation speed and charge pressure are studied experimentally. After the test, the wear state of the swash plate is observed. According to the friction trace on the surface of the swash plate, the prediction for the attitude of the slipper and the zone easy to wear are verified.

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“…Using this test rig, they measured the fluid film thickness and used these measurements to develop a model for the valve plate/cylinder block interface. Hashemi et al [19] developed a multi-dynamics model for the slipper/swash plate interface which also includes a mixed-lubrication model, using the authors' software Tribo-x. The model was validated through the creation of a special test rig in which the friction between the slipper and swash plate was measured [20].…”

Section: Introductionmentioning

confidence: 99%

Virtual Prototyping of Axial Piston Machines: Numerical Method and Experimental Validation

Chacon

Ivantysynova

2019

Energies

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This article presents a novel methodology to design swash plate type axial piston machines based on computationally based approach. The methodology focuses on the design of the main lubricating interfaces present in a swash plate type unit: the cylinder block/valve plate, the piston/cylinder, and the slipper/swash plate interface. These interfaces determine the behavior of the machine in term of energy efficiency and durability. The proposed method couples for the first time the numerical models developed at the authors' research center for each separated tribological interface in a single optimization framework. The paper details the optimization procedure, the geometry, and material considered for each part. A physical prototype was also built and tested from the optimal results found from the numerical model. Tests were performed at the authors' lab, confirming the validity of the proposed method.

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Multibody dynamics of pivot slipper pad thrust bearing in axial piston machines incorporating thermal elastohydrodynamics and mixed lubrication model

Cited by 55 publications

References 16 publications

The effect of energy accumulation and boundary slip on laminar flow between rotating plates

The effect of energy accumulation and boundary slip on laminar flow between rotating plates

Experimental Research on the Dynamic Lubricating Performance of Slipper/Swash Plate Interface in Axial Piston Pumps

Virtual Prototyping of Axial Piston Machines: Numerical Method and Experimental Validation

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