Non-uniform abrasive particle size effects on friction characteristics of FKM O-ring seals under three-body abrasion

Qin, Kun; Zhou, Qinglong; Zhang, Kai; Feng, Yingliang; Zhang, Tao; Gong, Zhongcheng; Xia, Beicheng; Liu, Baolin

doi:10.1016/j.triboint.2019.03.051

Cited by 41 publications

(19 citation statements)

References 23 publications

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“…The three-body abrasion of the sealing interface is thus considered a closed system [ 19 ]. This experimental method has been introduced in our previous research [ 20 ]. As shown in Figure 1 b, the abrasive particles were first sprinkled on the surface of FKM seals evenly to simulate the intrusion of particles into the sealing interface.…”

Section: Methodsmentioning

confidence: 99%

Effect of Thermal Degradation of FKM on Three-Body Abrasion under Dry Sliding: Severe Damage Led by the Particle Detention

et al. 2021

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Both the high temperature and particle environment at the downhole greatly aggravate the abrasive wear and shorten the service life of the fluororubber (FKM) seal seriously in drilling engineering. At present, there is less awareness of the tribological behavior of seals in such complex working conditions. In this work, the abrasive wear performance of the thermally degraded FKM seal was tested in the form of simulating the intrusion of abrasive particles into the interface. Results show that the wear of both rubber seals and metal counterparts is exacerbated. Through the analysis of the wear scar morphology and friction coefficient, it is revealed that more abrasive caves scatter on the surface due to the mechanical degradation of the FKM. These abrasion caves reduce the tendency of particles to escape from the caves and prolong the abrasive action. Furthermore, the abrasion cave alters the particle motion from sliding to rolling, which leads to more caves generated on the surface of the hard tribo-pair. These results enhance the understanding of the abrasive wear for FKM seals and hopefully contribute to the promotion of seals used in hot abrasive particle environments.

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Section: Methodsmentioning

confidence: 99%

Effect of Thermal Degradation of FKM on Three-Body Abrasion under Dry Sliding: Severe Damage Led by the Particle Detention

et al. 2021

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“…2The volume of the rubber material is constant, and it is regarded as a superelastic body. 3The piston and the outer cylinder are regarded as rigid bodies, and only the deformation of the O-ring is considered [17].…”

Section: Basic Assumptionsmentioning

confidence: 99%

Research and Analysis of Pressure-Maintaining Trapping Instrument for Macro-Organisms in Hadal Trenches

Wang

Chen

Wang

et al. 2020

JMSE

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The ecosystem of the abyss is one of the fields that humans hardly know. The ultra-high hydrostatic pressure makes it very difficult to obtain abyssal organisms. Samples are often severely broken during recovery due to changes in environmental pressure, temperature, and other factors. Currently, there are no macro-organism samplers suitable for the abyss. The development of a pressure-maintaining sampler for the abyss is a prerequisite for abyssal ecosystem research. This paper mainly proposed a pressure-maintaining trapping instrument (PMTI) designed to work at a depth above 10,000 m. Unlike typical deep-sea equipment, this instrument is lightweight (about 65 kg in water). The instrument adopts a new structure, using a hollow piston as the sampling space and sealing the mechanism with O-rings at both ends of the piston, thus avoiding sealing methods such as ball valves and greatly reducing the weight of the equipment. The structure and working process of the instrument are described in detail in this paper. Meanwhile, in this paper, the movement resistance of the piston (mainly the resistance of the O-ring) is analyzed using a dynamic explicit method in Abaqus. The factors affecting the friction of the O-rings are analyzed via the method of orthogonal tests and ANOVA. In addition, high-pressure tests were conducted on key parts of the instrument, and the results showed that the instrument works well at 100 MPa.

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“…The three-body abrasive wear caused by abrasive particles sandwiched between two contact surfaces has an important impact on the friction and wear of the surfaces [2,3]. The friction and wear properties of the third body depend on the material, hardness, particle size, and other parameters of the exogenous third body material [4,5]. When surface roughness is constant, the particle size and the external load affect the friction coefficient greatly [6].…”

Section: Introductionmentioning

confidence: 99%

Friction and Wear Properties of Wheat Straw Powder Third Body on Steel-Steel Friction Pair

Lian

Wang

et al. 2022

Agriculture

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Third body plant fibers have an important influence on the friction and wear properties of metal friction pairs. In this study, wheat straw powder with different particle sizes was prepared, and a pin-on-disk friction tester was employed to evaluate the friction and wear properties of the wheat straw powder third body on steel friction pairs under various conditions. The results show that the straw powder played an isolation role in the steel–steel friction pair, which reduced the contact area between the pin and the disc and thus reduced the friction coefficient. Compared with the large particle size powder, the small particle size powder became embedded in the friction interface or in the groove caused by wear, buffered the friction stress, and reduced the friction coefficient and wear. When lubricants such as lubricating oil or lubricating grease were added, the friction coefficient was significantly reduced. Under the influence of lubricant, the particle size of straw powder had no significant effect on the wear. The results of this study can provide a reference for the third body friction and wear properties of straw powder and the design of friction pairs for metal parts.

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Non-uniform abrasive particle size effects on friction characteristics of FKM O-ring seals under three-body abrasion

Cited by 41 publications

References 23 publications

Effect of Thermal Degradation of FKM on Three-Body Abrasion under Dry Sliding: Severe Damage Led by the Particle Detention

Effect of Thermal Degradation of FKM on Three-Body Abrasion under Dry Sliding: Severe Damage Led by the Particle Detention

Research and Analysis of Pressure-Maintaining Trapping Instrument for Macro-Organisms in Hadal Trenches

Friction and Wear Properties of Wheat Straw Powder Third Body on Steel-Steel Friction Pair

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