A Transient Thermoelastohydrodynamic Lubrication Model for the Slipper/Swashplate in Axial Piston Machines

Schenk, Andrew; Ivantysynova, Monika

doi:10.1115/1.4029674

Cited by 68 publications

(42 citation statements)

References 12 publications

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“…The model yields the pressure field distribution, the temperature field distribution, surface elastic deformations, leakage flow and the energy dissipation due to viscous flow in all three lubricating interfaces. For more details on the TEHD model refer to [21,24,38]:…”

Section: Thermo-elastohydrodynamic Model For the Lubricating Interfacesmentioning

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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Section: Thermo-elastohydrodynamic Model For the Lubricating Interfacesmentioning

confidence: 99%

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

Chacon

Ivantysynova

2019

Energies

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“…The film temperature distribution is obtained using the energy equation. If the heat conduction relationship between fluid film and slipper is considered, the film temperature field is calculated from Equation

\nabla \cdot ((), ρ c_{p} italicμT) = \nabla \cdot ((), λ \nabla T) + ([], {(\frac{\partial v_{r}}{\partial z})}^{2} + {(\frac{\partial v_{θ}}{\partial z})}^{2} + \frac{4}{3} {(\frac{v_{r}}{r})}^{2} + {(\frac{v_{θ}}{r})}^{2})

where T is the film temperature, c p is the fluid specific heat, ρ is the oil density, and λ is the fluid heat conductivity.…”

Section: Thermoelastohydrodynamic Modelmentioning

confidence: 99%

“…If the heat conduction relationship between fluid film and slipper is considered, the film temperature field is calculated from Equation (26). 25 ∇⋅ ρc p μT…”

Section: Energy Equationmentioning

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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“…[14] studied the multi-body dynamics considering the mixed lubrication model, Ref. [15] presented a transient thermoelastohydrodynamic lubrication model and Ref. [16] predicted the slipper behaviors use a similar advanced model.…”

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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A Transient Thermoelastohydrodynamic Lubrication Model for the Slipper/Swashplate in Axial Piston Machines

Cited by 68 publications

References 12 publications

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

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

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

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

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