Experimental assessment of hydrostatic thrust bearing performance

Osman, T. A.; Dorid, M.; Safar, Z.S.; Mokhtar, Mohamed

doi:10.1016/0301-679x(95)00078-i

Cited by 61 publications

(67 citation statements)

References 6 publications

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“…Film thickness is obtained: h = 0.03mm, h = 0.036mm, h = 0.038mm, h = 0.04mm, h = 0.042mm, h = 0.044mm, h = 0.05mm. SIMPLE algorithm is used to solve the hydrostatic oil pads film model established, and the continuity and speed of residuals curves are less than 3 1 10 , which illustrated the computing model and the quality of the segmentation are good, and the result is the convergence.…”

Section: -3mentioning

confidence: 99%

“…Sun Shouqun and Zhang Shaopeng [2] calculated and analyzed the stiffness of oil film in hydrostatic guide by using nonlinear finite element software MARC and the software for hydrodynamics calculation FLUENT. Yu Xiaodong and Lu Huaimin [3] calculated the pressure distribution of the oil film which formed by circular and fan-shape oil pads, through a program using FORTRAN language and Visual Basic 6.0. And the Egyptian scholar T.A.Osman [4] and his team have analyzed the impact on the carrying capability and stiffness of oil film, by testing the thickness of film, pressure of oil chamber and flow in experiments, then compare it with the theoretical result.…”

Section: Introductionmentioning

confidence: 99%

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Research on carrying capacity of hydrostatic slideway on heavy-duty gantry CNC machine

Cui¹,

Guo

Wang

et al. 2017

AIP Conference Proceedings

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A software safety assessment method based on the combination of frequency analysis method and analytic hierarchy process AIP Conference Proceedings 1839, 020158 (2017) Abstract. Hydrostatic slideway is a key part in the heavy-duty gantry CNC machine, which supports the total weight of the gantry and moves smoothly along the table. Therefore, the oil film between sliding rails plays an important role on the carrying capacity and precision of machine. In this paper, the oil film in no friction is simulated with three-dimensional CFD. The carrying capacity of heavy hydrostatic slideway, pressure and velocity characteristic of the flow field are analyzed. The simulation result is verified through comparing with the experimental data obtained from the heavy-duty gantry machine. For the requirement of engineering, the oil film carrying capacity is analyzed with simplified theoretical method. The precision of the simplified method is evaluated and the effectiveness is verified with the experimental data. The simplified calculation method is provided for designing oil pad on heavy-duty gantry CNC machine hydrostatic slideway.

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Section: -3mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Research on carrying capacity of hydrostatic slideway on heavy-duty gantry CNC machine

Cui¹,

Guo

Wang

et al. 2017

AIP Conference Proceedings

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“…How to improve the oil film stiffness of hydrostatic guide-way is becoming the main problem to improve the machining accuracy of machine tool, for which the fluctuation of oil film thickness from the change of load will affect it during application process. Many research about features of hydrostatic guide-way have been done in order to improve its carrying capacity and stiffness: references [2] and [3] analyzed the influence of oil chamber depth on guide-way performance, references [4] and [5] analyzed the effect of machining accuracy and parameter as the location of oil chamber on guide-way respectively. Oil thinness has been controlled through changing oil viscosity based on the relationship between capillary restrictor flow [6].…”

Section: Introductionmentioning

confidence: 99%

Research on a New Method for Improving the Mechanical Properties of Hydrostatic Guide-way

Shi¹,

Guo²,

Huang³

2017

dtetr

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Abstract. Guide-way is the most important part for ultra-precision CNC machine tool. Its carrying capacity and stiffness are important performance parameters for it. Hydrostatic guide-way is used on CNC machine tools because of its advantages. In order to meet the requirements of ultra-precision CNC machine tool for precision and high speed, a new type hydrostatic guide-way with high liquid resistance is put forward. The simulation has been done how the position, width and depth of the ring on oil seal edge of the new hydrostatic guide-way effect on the oil chamber pressure. It is verified from the simulation that the chamber's pressure of the hydrostatic guide-way can be enhanced significantly if the position, width and depth of the ring are appropriate. It is reasoned that the carrying capacity and stiffness of the hydrostatic guide-way are improved when a ring is set on its oil seal edge. The conclusion can be got that the new type hydrostatic guide-way has a better carrying capacity and stiffness because of the ring set on the oil seal edge if its position, width and depth are appropriate.

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“…With increasing load the thickness of sliding layer decreases. This phenomenon is more significant in case of smaller radius of the recesses location from the axis of rotation [9]. Generally, the hydrostatic thrust bearings are designed to work with parallel surfaces.…”

Section: Introductionmentioning

confidence: 99%

Numerical modelling of the flow in the annular multi-recess hydrostatic thrust bearing using CFD methods

Kozdera

Drbáková

2013

EPJ Web of Conferences

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Abstract. The current research of hydrostatic bearings and hydrostatic slide-ways is far from being over. The topic is constantly evolving, creating new geometries of the sliding bearings, developing new types of friction materials and lubricants. The control elements of hydraulic mechanisms that serve to regulation of the hydrostatic bearings tipping are still in progress. Almost every application has different requirements for the bearings, whether in terms of loading capacity, speed rotation, and also the price. All these aspects should be included in the design of hydrostatic thrust bearings. Thanks to great advances in the development of computer technology and software for numerical modelling, we can simulate real movement of viscous fluids. To create a numerical model of hydrostatic thrust bearing, Ansys Fluent 14.0 software package has been applied. The article describes the basic methods of numerical modelling of the given problem and evaluates the pressure field and the loading capacity of annular multi-recess hydrostatic thrust bearing and its dependence on the change in static pressure.

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Experimental assessment of hydrostatic thrust bearing performance

Cited by 61 publications

References 6 publications

Research on carrying capacity of hydrostatic slideway on heavy-duty gantry CNC machine

Research on carrying capacity of hydrostatic slideway on heavy-duty gantry CNC machine

Research on a New Method for Improving the Mechanical Properties of Hydrostatic Guide-way

Numerical modelling of the flow in the annular multi-recess hydrostatic thrust bearing using CFD methods

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