Investigation on influences of herringbone grooves for the aerostatic journal bearings applied to ultra-high-speed spindles

Gao, Siyu; Shi, Yungao; Xu, Li; Chen, Hong; Cheng, Kai

doi:10.1177/0954406219850855

Cited by 13 publications

(5 citation statements)

References 20 publications

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“…The results show that triangular and trapezoidal groove bearings have apparent advantages under different working conditions. Gao et al (2019) analyzed the influence of different groove numbers, groove depths, and air supply pressures of herringbone PEG on the aerostatic sliding bearings of an ultra-high-speed spindle using the improved finite element method. Research shows that proper geometric parameters of herringbone grooves can reduce the radial runout of spindles.…”

Section: Introductionmentioning

confidence: 99%

Influence of Pressure-Equalizing Groove on Static Load Performance of Aerostatic Guideway

2023

JAFM

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The load capacity and static stiffness of the existing air hydrostatic guideways are relatively low, and the static performance of the air film is degraded when external forces are increased during the process. Therefore, this study considered an aerostatic guideway of an ultra-precision micromachine tool as the research object. Single- and double-row orifice structures were designed on the guideway, and linear, extended, and X-shaped pressure-equalizing groove (PEG) structures with rectangular cross-sections were designed on the working surface of the guideway. By establishing a computational fluid dynamics model of the guideway air film, the pressure contour was obtained through simulation, and finally, the advantages of the double-row orifice structure were determined. Then, the influences of the structure, width, and depth of PEG and the diameter and number of orifices on the load capacity, stiffness, and air consumption were studied, which provided a theoretical basis for improving the load performance of the aerostatic guideway. The results showed that the design of the PEG effectively improved the load performance but increased the air consumption. The extended PEG exhibited the best load performance. When the eccentricity was large, the width of the PEG moderately increased, improving the load capacity and stiffness. While increasing the depth only improved the stiffness, it had little effect on the load capacity and air consumption. When the eccentricity was small, the diameter and number of orifices moderately increased. The experimental data were consistent with the simulation results, demonstrating the accuracy of the simulation method.

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Section: Introductionmentioning

confidence: 99%

Influence of Pressure-Equalizing Groove on Static Load Performance of Aerostatic Guideway

2023

JAFM

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“…6,7 Chen et al 8 examined the major requirements in the design of the number and arrangement of the aerostatic bearings orifice for spindles operating at either low or high speeds. Gao et al 9 investigated the effect of herringbone grooves on the performance of aerostatic journal bearings in order to design spindles with higher accuracy and higher speeds. Song et al 10 developed a five-degree-of-freedom model for aerostatic spindles considering modified flow coefficients for high-speed conditions and gave optimal air film thicknesses for thrust and radial air bearings.…”

Section: Introductionmentioning

confidence: 99%

Integrated design and analysis of a high-precision aerostatic spindle for internal grinding machines and its implementation perspectives

Cheng

Bai

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part J:

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Aerostatic spindles are commonly employed in ultra-precision machines. The aerostatic spindle, as a critical key component for the development of industrial ultra-precision grinding machines, requires an industrial feasible precision engineering approach to robust design and optimization in order to render the high-precision spindle system. This paper presents such an approach to the design and development of aerostatic spindles and the associated digital virtual spindle systems based on multiscale modelling and analysis. Multiscale modelling and analysis combined with the virtual spindle simulation are used as the kernel of the virtual spindle system, including innovative design on the spindle system structure, fluid dynamics modelling, drive and control system, and the integration of the spindle electromechanical system, which can be used to systematically model and simulate both the static and dynamic performances of the aerostatic spindle system. Experiments are carried out to evaluate and validate the above approach and the virtual spindle simulations, which can be further utilized for the development of next-generation high-precision aerostatic spindle systems.

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“…Yan used CFD software to simulate and analyze the influence of different shapes of pressure-equalizing grooves on bearing performance [9]. Gao used CFD software to simulate and analyze the influence of the herringbone groove on the performance of the aerostatic journal under the conditions of high speed and low pressure [10]. The first step of CFD analysis and calculation is to generate meshes, that is, to subdivide the continuous calculation area in space, divide it into many sub-areas, and determine the nodes in each area.…”

Section: Introductionmentioning

confidence: 99%

Design and Research of Symmetrical Multi-Throttle Thrust Hydrostatic Bearing Based on Comparative Analysis of Various Meshes

Liu

Cao²,

Zou³

et al. 2022

Symmetry

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Due to the advantages of high rotation accuracy and long life, hydrostatic air bearings are widely used in precision rotation equipment, such as machine tools and turntables. It is imperative to reasonably design the structural size of the bearing, especially as the size of the bearing in the precision turntable determines the bearing capacity of the turntable. At present, commercial CFD software is used chiefly for simulation verification for the design of air bearings. The mesh divided in the simulation calculation has a significant impact on the efficiency of the calculation and determines the accuracy of the final simulation results. Therefore, this paper takes the symmetrical multi-throttle thrust bearing in the precision turntable as the research object and compares and studies the advantages and disadvantages of sliced structured meshes, continuous structured meshes, and unstructured meshes. On this basis, simulation analysis of bearing capacity for different radial equalizing groove lengths, widths, and depths and explores the influence of the structure size of the thrust bearing on its bearing capacity. The study shows that the length and depth of the throttle groove significantly influence the bearing capacity, while the width has little influence on the bearing capacity. Therefore, under the specific cavity volume to ensure the dynamic characteristics of the bearing, the width of the throttling groove should be reduced first, and the length and depth of the throttling groove should be increased to improve the bearing capacity.

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Investigation on influences of herringbone grooves for the aerostatic journal bearings applied to ultra-high-speed spindles

Cited by 13 publications

References 20 publications

Influence of Pressure-Equalizing Groove on Static Load Performance of Aerostatic Guideway

Influence of Pressure-Equalizing Groove on Static Load Performance of Aerostatic Guideway

Integrated design and analysis of a high-precision aerostatic spindle for internal grinding machines and its implementation perspectives

Design and Research of Symmetrical Multi-Throttle Thrust Hydrostatic Bearing Based on Comparative Analysis of Various Meshes

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