Tribological Characterization of Some Elastomers Used at Progressive Cavity and Piston Pumps

Al, Naboulsi Mohamed Iyad; Antonescu, N N; Diniţă, Alin; Morosanu, Marius

doi:10.1051/matecconf/202031801016

Cited by 2 publications

(1 citation statement)

References 2 publications

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“…The wear phenomenon of polymer materials has received considerable attention as it directly affects the reliability, stability, and safety of materials in industrial applications [ 1 , 2 , 3 , 4 , 5 , 6 ]. As one of the most attractive matrixes in polymers, nitrile–butadiene rubber (NBR) has exhibited outstanding wear resistance, chemical resistance, and a wide range of operating environments [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

A Molecular Dynamics Simulation Study on Enhancement of Mechanical and Tribological Properties of Nitrile—Butadiene Rubber with Varied Contents of Acrylonitrile

Yuan,

Li,

Wang

et al. 2023

Polymers

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The molecular models of nitrile–butadiene rubber (NBR) with varied contents of acrylonitrile (ACN) were developed and investigated to provide an understanding of the enhancement mechanisms of ACN. The investigation was conducted using molecular dynamics (MD) simulations to calculate and predict the mechanical and tribological properties of NBR through the constant strain method and the shearing model. The MD simulation results showed that the mechanical properties of NBR showed an increasing trend until the content of ACN reached 40%. The mechanism to enhance the strength of the rubber by ACN was investigated and analyzed by assessing the binding energy, radius of gyration, mean square displacement, and free volume. The abrasion rate (AR) of NBR was calculated using Fe-NBR-Fe models during the friction processes. The wear results of atomistic simulations indicated that the NBR with 40% ACN content had the best tribological properties due to the synergy among appropriate polarity, rigidity, and chain length of the NBR molecules. In addition, the random forest regression model of predicted AR, based on the dataset of feature parameters extracted by the MD models, was developed to obtain the variable importance for identifying the highly correlated parameters of AR. The torsion–bend–bend energy was obtained and used to successfully predict the AR trend on the new NBR models with other acrylonitrile contents.

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Section: Introductionmentioning

confidence: 99%

A Molecular Dynamics Simulation Study on Enhancement of Mechanical and Tribological Properties of Nitrile—Butadiene Rubber with Varied Contents of Acrylonitrile

Yuan,

Li,

Wang

et al. 2023

Polymers

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Roller Profiling for Generating the Screw of a Pump with Progressive Cavities

Baroiu¹,

Moroşanu²,

Teodor³

et al. 2021

Inventions

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Progressive cavity pumps are used in industry for the circulation of high viscosity fluids, such as crude oil and petroleum products, sewage sludge, oils, salt water, and wastewater. Also known as single screw pumps, these pumps are composed of a single rotor which has the shape of a rounded screw, which moves inside a rubber stator. The stator has an double helical internal surface which, together with the helical surface of the rotor, creates a cavity that moves along the rotor. The movement effect of the cavity inside the stator is the movement of the fluid with a constant flow and high pressure. In this paper, an algorithm for profiling the rollers for generating the helical surface of the pump rotor with progressive cavities is proposed. These rollers are constituted as tools for the plastic deformation of the blank (in case the pump rotor is obtained by volumetric deformation) or for its superficial hardening.

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Tribological Characterization of Some Elastomers Used at Progressive Cavity and Piston Pumps

Cited by 2 publications

References 2 publications

A Molecular Dynamics Simulation Study on Enhancement of Mechanical and Tribological Properties of Nitrile—Butadiene Rubber with Varied Contents of Acrylonitrile

A Molecular Dynamics Simulation Study on Enhancement of Mechanical and Tribological Properties of Nitrile—Butadiene Rubber with Varied Contents of Acrylonitrile

Roller Profiling for Generating the Screw of a Pump with Progressive Cavities

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