Comparative studies on double-layered protuberant foil bearing and Hydresil foil bearing

Hou, Yu; Ma, Bo; Chen, Shuangtao; Lai, Tianwei; Zhou, Quan

doi:10.1177/1350650115595647

Cited by 2 publications

(2 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Two eddy current displacement sensors are mounted on the turbo-expander house with 90° interval to measure the motion of the middle section of the turbo-expander rotor. Other details for the test rig can be seen in the literature (Hou, 2016).…”

Section: Natural Frequency Analysismentioning

confidence: 99%

Numerical and experimental study on the dynamic characteristics of the foil journal bearing with double-layer protuberant support

Zheng

Chen²,

Lai³

et al. 2016

JAMDSM

Self Cite

View full text Add to dashboard Cite

A type of foil journal bearings with double-layer protuberant foils as elastic support was studied by numerical analysis and experiments. Two kinds of material (beryllium bronze and stainless steel) with different elasticity were used for the protuberant foils of the bearings. The analyzing model couples the hydrodynamics pressure of the gas film to the elastic deflection of the top foil and the underlying protuberant foils. The hydrodynamics of gas film is described by the Reynolds equation. The top foil and the protuberant foils are modeled as thin plates and the protuberances are treated as rigid support. For calculating the deflection of the top foil, the deflection of the protuberant layer beneath the top foil is taken into account. With a given load, the gas film thickness and pressure are obtained by using finite element method and finite difference method. The key static and dynamic parameters are presented. In experiments, both of the two foil bearings run well in a turbo-expander. The new takeoff and shutoff pressure and speed are proposed for practical operation of the hydrodynamic lubricated high speed turbo-expander. In addition, the synchronous and subsynchronous rotor motions have been tested and analyzed. The experimental tests of the two bearings in a high-speed turbo-expander suggest that the bearing using stainless steel as the foil material shows higher stiffness, which agrees well with the numerical predictions.

show abstract

Section: Natural Frequency Analysismentioning

confidence: 99%

Numerical and experimental study on the dynamic characteristics of the foil journal bearing with double-layer protuberant support

Zheng

Chen²,

Lai³

et al. 2016

JAMDSM

Self Cite

View full text Add to dashboard Cite

show abstract

“…Their experimental results indicated that the bearing temperature is affected by rotational speed and load, and speed is more influential. Hou et al (2015) conducted experimental studies on protuberant foil journal bearings and the conventional hydresil foil journal bearing. Lai et al (2016) carried out a series of experimental investigations on the multi-layer protuberant foil thrust bearing, which proved that the protuberant foil thrust bearing had good static characteristics and stability.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of aerodynamic lubricated double-decked protuberant foil thrust bearing

Guo

Hou

Wang

et al. 2019

JAMDSM

Self Cite

View full text Add to dashboard Cite

Double-decked protuberant foil bearing is a type of foil bearing that uses two stacking-up layers of protuberant foils as supporting structure. In preliminary experiments, wear failure of foil thrust bearing occurs occasionally due to excessive axial load in the bearing. Further improvement of the bearing performance is necessary for its better engineering application. In this paper, a numerical model of this kind of foil bearing is applied to predict its static characteristics. Reynolds equation and Kirchhoff equation are coupled via successive iterations of film pressure and foil deformation. A parametric study is conducted to improve the static characteristics of the bearing, which is conducive to load capacity improvement. The load capacity of the bearing is represented by the bearing load with the given nominal film clearance. Due to point and surface contact between the foils, distribution of protuberances plays an important role in the stiffness distribution of the protuberant foil thrust bearing. Effect of radial location of protuberances on bearing load is analyzed. Furthermore, parametric studies with different foil thickness and diameter are conducted for further optimization. The results indicate that large unevenness of stiffness distribution will deteriorate its static characteristics. Through adjustment of the radial locations of protuberances, static performance of the double-decked protuberant foil thrust bearing can be improved prominently under different operating conditions.

show abstract

Comparative studies on double-layered protuberant foil bearing and Hydresil foil bearing

Cited by 2 publications

References 21 publications

Numerical and experimental study on the dynamic characteristics of the foil journal bearing with double-layer protuberant support

Numerical and experimental study on the dynamic characteristics of the foil journal bearing with double-layer protuberant support

Numerical analysis of aerodynamic lubricated double-decked protuberant foil thrust bearing

Contact Info

Product

Resources

About