The Sliding Friction of Hybrid Composite Journal Bearing Under Various Test Conditions

Kim, Seong Su; Yu, Hongkun; Hwang, In Uk; Lee, Dai Gil; Kim, Seong Nam; Suzuki, Kazuyoshi; Sada, Hiroyuki

doi:10.1007/s11249-009-9450-6

Cited by 23 publications

(8 citation statements)

References 11 publications

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“…So due to this friction the heat is generated in large quantity provided by Seong Su Kim et al [154] In one hand, the bearing makes them suitable for supporting rotors in industrial machinery with heavy loads, but on the other hand, failures in the journal bearings can lead large economic losses and major safety problems. Therefore, the bearings need to monitor them and diagnose the faults for early detection by Parno, R. et al [155] Vibration monitoring is the method of detecting the vibrations and identifying the characteristics in the rotating machinery.…”

Section: Fixed Geometry Bearing Dynamics and Vibration Monitoringmentioning

confidence: 99%

A Review on Application of Dynamic Parameters of Journal Bearing for Vibration and Condition Monitoring

Babu

Raj²,

Lakshmanan

2015

J. mech.

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The journal bearings are used to support high-speed rotors in turbo machinery which often operate above the rotor first bending critical speed. This bearing provide both lateral support and dynamic coefficients: Stiffness, damping, and mass terms, related to machine vibrations. The various methods of identifying journal bearing dynamic characteristics, from measured data, obtained from different measurement systems, are reviewed. The various approaches to the bearing identification problem are discussed. The various data processing methods in the time and frequency domains are presented. Also, vibration and condition monitoring techniques are presented. In this review, the relative strengths and weaknesses of bearing are presented and developments and trends in improving bearing measurements are documented. Future trends of journal bearing are discussed.

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Section: Fixed Geometry Bearing Dynamics and Vibration Monitoringmentioning

confidence: 99%

A Review on Application of Dynamic Parameters of Journal Bearing for Vibration and Condition Monitoring

Babu

Raj²,

Lakshmanan

2015

J. mech.

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“…microcapsules, PTFE/aramid fiber composite liners, solid-liquid lubrication, tribological properties 1 | INTRODUCTION PTFE/aramid fiber composite liners are widely used in aerospace science and engineering as an exclusive self-lubricating layer for self-lubricating spherical plain bearings due to their excellent self-lubricity, high heat resistance, as well as excellent chemical stability. 1,2 However, the clearance between the outer surface of the inner sphere and the inner surface of the outer ring in the selflubricating spherical plain bearing increases and further exceeds the applicable requirements due to poor wear resistance of PTFE in the liners under heavy-load conditions, thus leading to typical bearing failure. 3,4 As such, the enhancement of tribological properties of PTFE/ aramid fiber composite liners has become one of crucial means to extend the service life of bearings.…”

Section: Introductionmentioning

confidence: 99%

Effect of different microcapsule types on the wear mechanism of PTFE/aramid fiber composite liners

Yan,

Pang,

et al. 2023

Polymer Composites

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In this study, three different methods based on vacuum adsorption, solvent volatilization, and Pickering emulsion were utilized to prepare microcapsules with the core material of PAO40 and the wall materials of SiO2, polysulfone (PSF), and PSF/SiO2 composites, respectively. PTFE/Kevlar fabric liners were modified by PAO40/SiO2 microcapsules (PSMS), PAO40/PSF microcapsules (PPMS), and PAO40/PSF/SiO2 microcapsules (PPSMS). The effect of microcapsules based on different wall materials on the tribological properties of liners was investigated by friction and wear tester under low‐speed and heavy‐load conditions. The anti‐friction and anti‐wear mechanisms of several microcapsule types on the liners were systematically investigated. The results showed that PPMS induced the most significant enhancement in anti‐friction properties of liners when compared to pure liner resulting in a 19.4% reduction in coefficient of friction (COF). PSMS was found to reveal much better wear resistance of liners, as evidenced by 75% increase in wear rate. PSMS and PPSMS not only release lubricating oil after the break of microcapsules under the friction action to lubricate, but also generate a cavity to store abrasive debris for liner wear reduction. Nonetheless, PPMS only released the oil onto the friction surfaces for lubrication. PSF as the microcapsule wall material could not contribute to the formation and promote wear resistance of transfer films. SiO2 as a microcapsule wall material participates in the formation and enhances the wear resistance of transfer films. The findings obtained are anticipated to improve the reliability and broaden the range of applications of liners in aerospace and other industrial fields.Highlights Three microcapsules all improve the tribological properties of the liners. Anti‐friction and wear‐resisting mechanism of three microcapsules in liners. SiO2 as wall material can increase the wear resistance of transfer films. PAO40 in microcapsules has antifriction effect at the friction interface.

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“…They operate in a mixed friction mode, when direct contact occurs during operation alternating with hydrodynamic friction [2].…”

Section: Introductionmentioning

confidence: 99%

Research of the Quality of Quarry Dumpers Engine Crankshafts Sliding Bearings of Various Manufacturers

2017

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Abstract. Sliding bearings are an important part of many large and critical components. They are widely used in power equipment, high-capacity pumps, compressors, electric motors and internal combustion engines (ICE). As a rule, sliding bearings include an antifriction bushing, part of the shaft surface (bearing journal), and a layer of oil between them. These are complex and critical parts in which there may occur dangerous defects, and which directly affect the durability, accuracy and reliability of the entire unit. To ensure high reliability of the equipment with sliding bearings applied in complex equipment, it is necessary to provide the quality control and sufficient level of monitoring of the technical condition, as well as diagnosis of emerging defects. This paper presents a comparative analysis of the internal combustion engines sliding bearings quality of various manufacturing companies. It gives operational properties of bearings depending on the compositional composition. The results of chemical analysis of the base, the cover and intermediate layers of the ICE liners are presented here. We have also made recommendations to increase the operational performance of sliding bearings.

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The Sliding Friction of Hybrid Composite Journal Bearing Under Various Test Conditions

Cited by 23 publications

References 11 publications

A Review on Application of Dynamic Parameters of Journal Bearing for Vibration and Condition Monitoring

A Review on Application of Dynamic Parameters of Journal Bearing for Vibration and Condition Monitoring

Effect of different microcapsule types on the wear mechanism of PTFE/aramid fiber composite liners

Research of the Quality of Quarry Dumpers Engine Crankshafts Sliding Bearings of Various Manufacturers

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