Performance analysis of multi-leaf oil lubricated foil bearing

Hu, Liguo; Zhang, Guanghui; Liu, Zhansheng; Ma, Rui; Wang, Yu; Zhang, Jinfeng

doi:10.1177/1350650113475560

Cited by 13 publications

(15 citation statements)

References 7 publications

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“…From Ref. [2], the flexibility matrix of the foil structure without back supported spring is as follows: Fig. 3, the back supported spring structure located at the abduction angle a.…”

Section: Flexibility Of the Back Supportedmentioning

confidence: 99%

“…So the Reynolds boundary condition is employed in this study, which is used in Ref. [2]. For the Reynolds boundary condi tion, the Christopherson Algorithm is adopted.…”

Section: Governing Equation Andmentioning

confidence: 99%

“…[2], the cal culation domain for the foil bearing is meshed. The expression of pressure on any point can be solved by this method, which will not be discussed in detail in this paper.…”

Section: Governing Equation Andmentioning

confidence: 99%

“…It indicated that the designed oil lubri cated foil bearing could provide high rotating speed, long life and lower friction loss. Hu et al [2] analyzed the performance of the multileaf foil bearing by theoretical analysis and numerical simu lation. It indicated that the load capacity of the multileaf foil bear ing was smaller than that of the fixed geometry oil bearing without foil deformation, whereas the stability of the bearing was increased.…”

Section: Introductionmentioning

confidence: 99%

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Performance Analysis of Oil Lubricated Foil Bearing With Flexible Supported Back Spring Structure—Part I: Model Development and Numerical Investigation

Zhang

Xie

Wang

et al. 2014

Journal of Engineering for Gas Turbines and Power

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A new type o f multileaf oil lubricated foil bearing with flexible supported back spring structure was proposed to satisfy the requirement o f high rotating velocity fo r turbo pump, where the rotor was submerged in the hydraulic oil. The numerical analysis was carried out in this paper. Based on the structure o f oil fo il bearing, the film thickness model was established without fo il deformation. By employing Castigliano's theorem, the total flexibility matrix including the elastic back spring and cantilevered curved beam was calculated, and then compared with commercial finite element software to verify the accuracy o f the proposed model. The obtained flexibility matrix was brought into the static and dynamic oil lubricated Reynolds equation. The Reynolds boundary condition was considered to simulate the oil film rupture effect. The deformation equation fo r the structure and the Reynolds equation were solved coupled by the successive over relaxa tion method. The static and dynamic characteristics o f the oil lubricated multileaf foil bearing with supported back spring were acquired. The effect o f the fo il thickness on the load capacity was discussed. The variation o f the dynamic coefficients with bearing load was acquired. By employing Routh-Hurwitz method, the stability o f the bearing was ana lyzed. The results indicated that the load capacity o f the foil bearing with back supported spring was bigger than that o f the fo il bearing without back supported spring. The stabil ity characteristics o f the fo il bearing with back supported structure was better than tradi tional rigid self-acting bearing, particular fo r the high rotating speed case.

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“…From Ref. [2], the flexibility matrix of the foil structure without back supported spring is as follows: Fig. 3, the back supported spring structure located at the abduction angle a.…”

Section: Flexibility Of the Back Supportedmentioning

confidence: 99%

“…So the Reynolds boundary condition is employed in this study, which is used in Ref. [2]. For the Reynolds boundary condi tion, the Christopherson Algorithm is adopted.…”

Section: Governing Equation Andmentioning

confidence: 99%

“…[2], the cal culation domain for the foil bearing is meshed. The expression of pressure on any point can be solved by this method, which will not be discussed in detail in this paper.…”

Section: Governing Equation Andmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Performance Analysis of Oil Lubricated Foil Bearing With Flexible Supported Back Spring Structure—Part I: Model Development and Numerical Investigation

Zhang

Xie

Wang

et al. 2014

Journal of Engineering for Gas Turbines and Power

Self Cite

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show abstract

“…Due to the introduction of compliance coefficient, the convergence of the EHD solution was improved, and the design guidelines were discussed. Liu et al (30,31) extended this structure to the oil-lubricated multileaf foil bearing and built up a test rig to verify the theoretical investigation. Tian et al (32) conducted the static and dynamic load tests under conditions of non-spinning shaft with different excitation frequency.…”

Section: Introductionmentioning

confidence: 98%

The Effect of Area Contact on the Static Performance of Multileaf Foil Bearings

Zhu

et al. 2015

Tribology Transactions

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For multileaf foil bearings，the interactions between adjacent foils, foils and gas film are key to predict the bearing performance. However, most of the analytical models were based on line contact rather than area contact between adjacent foils and the latter may occur and play an important role in load capacity. In this study, the curved beam model is adopted to build up the elastohydrodynamic model considering the area contact between adjacent foils, which is solved iteratively coupling the Reynolds equation by the finite element method. An algorithm is developed to judge and determine the contact condition of adjacent foils. The simulation results show that the area contact between adjacent foils does occur and the contact area expands with the increasing of eccentricity ratios and rotational speeds, which make the film thickness distribution smooth and are beneficial to the increase of load capacity. The area contact occurs near the trailing end of the foils first, and then gradually expands. The later formed contact area bears greater load capacity instead of the early formed contact area, and the load capacity is mainly provided by the gas film on the foils with more area contact.

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Stability analysis of multi-leaf oil-lubricated foil bearings with back springs based on nonlinear oil film force model

Zhang,

Han,

et al. 2024

Nonlinear Dyn

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Performance analysis of multi-leaf oil lubricated foil bearing

Cited by 13 publications

References 7 publications

Performance Analysis of Oil Lubricated Foil Bearing With Flexible Supported Back Spring Structure—Part I: Model Development and Numerical Investigation

Performance Analysis of Oil Lubricated Foil Bearing With Flexible Supported Back Spring Structure—Part I: Model Development and Numerical Investigation

The Effect of Area Contact on the Static Performance of Multileaf Foil Bearings

Stability analysis of multi-leaf oil-lubricated foil bearings with back springs based on nonlinear oil film force model

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