Design and Optimization of the Surface Texture at the Hydrostatic Bearing and the Spindle for High Precision Machining
TLDR
In this paper , the influence of the surface texture shape and height on the thrust bearing performance of the hydrostatic spindle is systematically investigated by comparative analysis, and the CFD simulations are developed to analyze the computational results based on the theory of viscosity-temperature characteristics.Abstract:
Hydrostatic bearing spindles are widely applied in high precision grinding and turning machines due to their good dynamic stability and rotational accuracy. However, under the condition of high-speed rotations, the heat generated by the friction of the oil film will cause the shear thinning effect. It not only reduces the rotation accuracy of the spindle but also reduces the service life of the spindle. The surface texture structure and configuration between the planes play the role of homogenizing oil film temperature and preventing the bearing surface wear caused by excessive concentration of temperature, which can change the relative motion from the inside of the oil film and thus improve the performance of the hydrostatic spindle more effectively. In this paper, the influence of the surface texture shape and height on the thrust bearing performance of the hydrostatic spindle is systematically investigated by comparative analysis. The CFD simulations are developed to analyze the computational results based on the theory of viscosity-temperature characteristics. The results show that when the height of the surface structure is 1 ~ 2 times the oil film thickness, the spindle bearing performance is the best. The average temperature in the bearing region is the lowest and the accuracy of the simulations was verified by experimental results.read more
Citations
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Analysis of Hydrostatic Bearings Based on a Unstructured Meshing Scheme and Turbulence Model
Yingjie Wang,Hao Wu,Youmin Rong +2 more
TL;DR: In this paper , the authors proposed an approach using the global fluid domain for performance analysis of guideway hydrostatic bearing with the function of supporting and moving loads, which can satisfy the demands of static and dynamic high-accuracy simulation.
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Research on the dynamic pressure effect of clearance oil film of stepped hydrostatic thrust bearing
TL;DR: In this article , the dynamic pressure effect of the clearance oil film of a stepped hydrostatic thrust bearing is studied by taking the double rectangular cavity oil cushion as an example. And the authors show that the theoretical value of the average dynamic pressure and the rotational speed show a linear growth relationship with a slope of 275.2.
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Eksenel Hidrostatik Yatak Tasarımı için Analitik Model ve Tasarım Parametrelerinin CYM ile Değerlendirilmesi
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References
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Journal ArticleDOI
State of the art in Laser Surface Texturing
TL;DR: In this paper, the authors present the state of the art in LST and the potential of this technology in various lubricated applications like mechanical seals, piston rings and thrust bearings.
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Hydrodynamic lubrication of textured surfaces: A review of modeling techniques and key findings
TL;DR: In this paper, the authors provide a comparative summary of different modeling techniques for fluid flow, cavitation and micro-hydrodynamic effects for surface texturing, and provide the key findings.
Journal ArticleDOI
A Laser Surface Textured Parallel Thrust Bearing
TL;DR: In this article, the potential use of a new technology of laser surface texturing (LST) in parallel thrust bearings is theoretically investigated, where the surface texture has the form of micro-dimples with pre-selected diameter, depth, and area density.
Journal ArticleDOI
A Model for Mechanical Seals with Regular Microsurface Structure
Izhak Etsion,Leonid Burstein +1 more
TL;DR: In this paper, a mathematical model is developed to allow performance prediction of all-liquid noncontacting mechanical seals with regular micro-surface structure in the form of hemispherical pores, and an optimum pore size is found that depends on the other variables and corresponds to maximum axial stiffness and minimum friction torque.
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Experimental Investigation of Laser Surface Textured Parallel Thrust Bearings
TL;DR: In this article, the performance of unidirectional and bi-directional partial-LST bearing with a baseline, untextured bearing is compared with that of a baseline bearing in terms of increased clearance and reduced friction.