Turbulent-flow hydrostatic bearings: Analysis and experimental results

Andrés, Luis San; Childs, Dara W.; Zhou, Yang

doi:10.1016/0020-7403(94)00104-r

Cited by 34 publications

(33 citation statements)

References 17 publications

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“…Figure 4 shows that the load-carrying capacity of the present numerical model is in accordance with results of Kurtin et al 21 The discrepancies between the results of present numerical model and the experimental results of San Andres et al 12 are not more than 3 C, as shown in Figure 5. The effectiveness of the present numerical model has been well validated.…”

Section: Validationsupporting

confidence: 92%

Investigation of the combined influence of turbulence and thermal effects on the performance of water-lubricated hybrid bearings with circumferential grooves and stepped recesses

Wang

Pei

Xiong

et al. 2013

Proceedings of the Institution of Mechanical Engineers, Part J:

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Hybrid bearings have been used in high-speed machine tools due to their inherent advantages of low temperature rise, high load-carrying capacity, and high stability. The objective of this study is to investigate the influence of turbulence and thermal effects on the performance of water-lubricated hybrid bearings with circumferential grooves and stepped recesses used to support high-speed spindles. The governing equations are solved using the finite element method with appropriate boundary conditions. A bulk-flow thermohydrodynamic model has been developed incorporating the turbulence effect. The results indicate that the turbulence effect appreciably affects the bearing performance. Besides, the thermal effect should also be taken into account especially when the rotating speed is high. The study gives a useful guide for the future hybrid bearing design and operation of high-speed spindles supported by water-lubricated hybrid bearings.

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Section: Validationsupporting

confidence: 92%

Investigation of the combined influence of turbulence and thermal effects on the performance of water-lubricated hybrid bearings with circumferential grooves and stepped recesses

Wang

Pei

Xiong

et al. 2013

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…The present model has been validated with the theoretical and experimental results of Kurtin,et al (15) and San Andres, et al (16), respectively. The bearing has a length and diameter equal to 76.2 mm.…”

Section: Validation Of Present Modelmentioning

confidence: 55%

Study on the Static Performance and Stability of a Water-Lubricated Hybrid Bearing with Circumferential Grooves and Stepped Recesses Considering the Influence of Recess Sizes

Wang

Pei

Xiong

et al. 2013

Tribology Transactions

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Bearings are key components in high-speed and highprecision machine tools. Temperature rise and stability are significant for a rotor-bearing system in a high-speed spindle. This study proposes a water-lubricated hybrid bearing with circumferential grooves and stepped recesses to lower the temperature rise and improve bearing stability. A bulk-flow thermohydrodynamic model is developed to predict the static performance and stability of the bearing. A comparison of the results confirms the validity of the model and the improved characteristics of the hybrid bearing. A sensitivity analysis is conducted to quantify the influence of recess sizes on bearing performance. The discussion defines the key parameters of bearing performance and provides a useful guide for the optimal design of hybrid bearings.

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“…San Andres et al carried out a systematic research on the water-lubricated hydrostatic journal bearings both theoretically and experimentally [17]. Numerical and experimental results show that predictions of the bearing performance characteristics like flow rate, load capacity, and rotor dynamic force coefficients are not affected by the small temperature variations (Δ < 10 ∘ C) in the water hydrostatic journal bearings.…”

Section: Staticmentioning

confidence: 99%

“…The dynamic coefficients of the journal bearings can be calculated by integrating the perturbed pressure across the fluid film. There are 16 stiffness and damping coefficients, and the dynamic coefficients can be grouped into four categories: coefficients of force to displacement, coefficients of force to angle, coefficients of moment to angle, and coefficients of moment to displacement: Figure 3: Geometry of the test water-lubricated hydrostatic journal bearing [17].…”

Section: Dynamic Characteristicsmentioning

confidence: 99%

“…The present numerical solution has been correlated and validated with the experimental results available in the literature. A five-recess, turbulent-flow, water-lubricated hydrostatic bearing operating at a high rotational speed is tested by San Andres et al [17]. Table 1 shows the bearing description and operating conditions and Figure 3 shows the schematic of the bearing.…”

Section: Comparisons Of Present Solution With Experimentalmentioning

confidence: 99%

See 1 more Smart Citation

Mathematical Model and Analysis of the Water-Lubricated Hydrostatic Journal Bearings considering the Translational and Tilting Motions

Feng

Wan

2014

Mathematical Problems in Engineering

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The water-lubricated bearings have been paid attention for their advantages to reduce the power loss and temperature rise and increase load capacity at high speed. To fully study the complete dynamic coefficients of two water-lubricated, hydrostatic journal bearings used to support a rigid rotor, a four-degree-of-freedom model considering the translational and tilting motion is presented. The effects of tilting ratio, rotary speed, and eccentricity ratio on the static and dynamic performances of the bearings are investigated. The bulk turbulent Reynolds equation is adopted. The finite difference method and a linear perturbation method are used to calculate the zeroth- and first-order pressure fields to obtain the static and dynamic coefficients. The results suggest that when the tilting ratio is smaller than 0.4 or the eccentricity ratio is smaller than 0.1, the static and dynamic characteristics are relatively insensitive to the tilting and eccentricity ratios; however, for larger tilting or eccentricity ratios, the tilting and eccentric effects should be fully considered. Meanwhile, the rotary speed significantly affects the performance of the hydrostatic, water-lubricated bearings.

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Turbulent-flow hydrostatic bearings: Analysis and experimental results

Cited by 34 publications

References 17 publications

Investigation of the combined influence of turbulence and thermal effects on the performance of water-lubricated hybrid bearings with circumferential grooves and stepped recesses

Investigation of the combined influence of turbulence and thermal effects on the performance of water-lubricated hybrid bearings with circumferential grooves and stepped recesses

Study on the Static Performance and Stability of a Water-Lubricated Hybrid Bearing with Circumferential Grooves and Stepped Recesses Considering the Influence of Recess Sizes

Mathematical Model and Analysis of the Water-Lubricated Hydrostatic Journal Bearings considering the Translational and Tilting Motions

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