Observation of Wear on PEEK-PTFE Hybrid Radial Bearings

Koike, Hitonobu; Mizobe, Koshiro; Oyama, Shunsuke; Kashima, Yuji; Kanemasu, Kenji; Kida, Katsuyuki

doi:10.4028/www.scientific.net/amr.683.385

Cited by 10 publications

(8 citation statements)

References 20 publications

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“…PEEK and PI [1][2][3][4][5] are two kinds of widely used engineering polymer materials as roller bearing cages and rings in ceramic bearings [6][7][8]. Ceramic bearings are developed for industrial applications under extreme and special operating conditions in water.…”

Section: Introductionmentioning

confidence: 99%

Aqueous lubrication and surface microstructures of engineering polymer materials (PEEK and PI) when sliding against Si3N4

et al. 2017

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Polyether-ether-ketone (PEEK) and polyimide (PI) are two kinds of engineering polymer materials widely used as roller bearing cages and rings under extreme environment because of their noise reduction and corrosion resistance properties. The Si 3 N 4 ceramic is the most common ball bearing material. Many current engineering applications of ball bearings require aqueous lubrication. Therefore, this study presents the aqueous lubrication of tribopairs formed by PEEK and PI material sliding against Si 3 N 4 ceramic. Experimental results show that two tribopairs exhibited the similar tribological properties under the dry condition. Water as a lubricant for the PI-Si 3 N 4 tribopair pairs effectively reduces both friction coefficients by 35.5% and wear rates by 32%. The water absorption of PI induces better tribological properties by changing the tribopair surface properties. In addition, the dimples appearing on the PI tribopair surface under water generate additional hydrodynamic lubrication and further improve the friction properties of surface. The PEEK-Si 3 N 4 tribopair shows similar friction coefficients under two kinds of environments. The wear rates under water are approximately more than two times of that under dry sliding. However, water inhibits the appearance of the crush phenomenon and enhances the carrying capacity of the tribopair. Energy dispersive spectroscopy and X-ray diffraction spectra demonstrate no chemical corrosion. The 3D profiler and SEM morphologies illustrate that the transfer film would be formed from the surface of PEEK under water but hindered under dry friction. Overall, the PI-Si 3 N 4 tribopair exhibits better properties than PEEK under water and is promising for future applications in the bearing industry.

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Section: Introductionmentioning

confidence: 99%

Aqueous lubrication and surface microstructures of engineering polymer materials (PEEK and PI) when sliding against Si3N4

et al. 2017

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“…The RCF tests of PEEK-PTFE radial bearings were done using the RCF test machine which was developed by Kida's group [1][2][3][4]6]. Figure 3 shows a schematic illustration of the RCF testing machine.…”

Section: Rolling Contact Fatigue (Rcf) Testmentioning

confidence: 99%

“…PEEK (Poly-Ether-Ether-Ketone) and PTFE (Poly-Tetra-Fluoro-Ethylene) have good mechanical features such as heat and corrosion resistance. In our previous studies on PEEK radial bearings [1][2][3][4], the effect of radial load on bearing life in dry conditions was investigated. Mizobe et al found that the wear resistance of the PEEK hybrid thrust bearing with a PTFE retainer was superior to that without the PTFE retainer [5].…”

Section: Introductionmentioning

confidence: 99%

Influence of groove shape on rolling contact fatigue of PEEK-PTFE hybrid radial bearings in dry conditions

et al. 2019

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In this study, rolling contact fatigue (RCF) tests were performed in order to investigate the effect of groove radius on the life of PEEK-PTFE hybrid radial bearings. Furthermore, solid state NMR spectroscopy was performed in order to investigate the molecular structure of PEEK. It was found that groove radius shape was related to limitations of the bearings, and the molecular structure of the PEEK was not changed by the temperature rise in this test. Furthermore, thermal failure of the PEEK was not affected by oxidation during RCF test.

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“…In addition, it has a long operation life of more than 1.0 × 10 7 revolutions and the tendency towards a lower load yields a longer life. 8) (b) Good Availability These oil-free plastic bearings are widely utilized currently in the food and medical industries that require cleanliness. Owing to this industrial application, PEEK-PTFE ball bearings are easy to acquire.…”

Section: Ball Bearingmentioning

confidence: 99%

Development of Reaction Wheels for Cubesats Using a Solid Lubricant Bearing

Fujita

Sakamoto

Ishimaru

et al. 2016

AEROSPACE TECHNOLOGY JAPAN

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Lubrication of bearings is the most significant element for high-speed rotation of a flywheel in a vacuum environment. This paper proposes a new reaction wheel for cubesats using a solid lubricant bearing. Generally, metal ball bearings and liquid lubricant are used for reaction wheels because liquid lubricant enables stable rotation even in a high-speed range. In contrast, liquid lubricant has a defect that lubrication becomes insufficient when its rotation stops. To protect bearings, it is desirable that a flywheel keeps rotating above a certain speed like momentum wheels. However, this is difficult for cubesats because there is insufficient power supply. To solve this problem, new reaction wheels were developed using polyether ether ketone ball bearings with polytetrafluoroethylene solid lubricant. It can maintain the lubrication effect even if a non-rotational state continues for a long period. Results of this evaluation found that the developed reaction wheel had a maximum torque of 0.189 mNm and a maximum angular momentum of 0.657 mNms. The performance is equivalent when compared to that of conventional-type reaction wheels.

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Observation of Wear on PEEK-PTFE Hybrid Radial Bearings

Cited by 10 publications

References 20 publications

Aqueous lubrication and surface microstructures of engineering polymer materials (PEEK and PI) when sliding against Si3N4

Aqueous lubrication and surface microstructures of engineering polymer materials (PEEK and PI) when sliding against Si3N4

Influence of groove shape on rolling contact fatigue of PEEK-PTFE hybrid radial bearings in dry conditions

Development of Reaction Wheels for Cubesats Using a Solid Lubricant Bearing

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