Three-Body Abrasion Study of a Dynamic Seal by a Micro-Scale Abrasion Test under Lubricated Conditions

Farfán-Cabrera, Leonardo Israel; Gallardo, E.A.

doi:10.4271/2016-01-0496

Cited by 5 publications

(1 citation statement)

References 27 publications

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“…The wear mechanisms corresponded to a local irregular micro-tearing process with micro-layered surface made of micro-tearing traces [4][5][6]. Similarly, this wear pattern was also found in previous research of micro-abrasion in silicone and nitrile rubber materials [7,8]. There are some standard methods to determine the two-body abrasion resistance of rubbers, such as: ASTM D4060, ASTM D2228 and ASTM D5963.…”

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confidence: 77%

Abrasive wear study of an acrylonitrile butadiene rubber (NBR) rotary seal in dry and muddy contact using a micro-abrasion tester

Cabrera¹,

Gallardo-Hernández²,

Calderon³

2017

Superficies y Vacio

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Rotary dynamic seals are widely used in machinery in order to retain fluids and to exclude external contaminants by allowing the free shaft movement. One of the most recurrent failure of seals is caused by abrasive wear under prolonged sliding contact. It is mainly produced either by partial dry running (two-body abrasion) and/or by interacting with abrasive hard fine particles, which are immersed in the fluids generating three-body abrasive wear. This work aims to study both types of abrasion using a micro-scale abrasion tester. For this, small samples were extracted from an Acrylonitrile Butadiene Rubber (NBR) lip of an actual dynamic seal. The testing was conducted in dry contact to generate two-body abrasive wear, as well as in a wet/muddy environment in order to reproduce three-body abrasion. The load was selected in order to approach the actual mean contact pressure of seals against rotary shafts. Hence, a stress relaxation test of the NBR samples was carried out to characterize the viscoelastic behavior. The wear scar morphologies and wear progression were analyzed in detail by optical microscopy, SEM analysis and optical profilometry. Finally, the experimental test was suitable to reproduce two-body and three-body abrasion on the samples since the particular wear patterns on small wear scars were obtained by short experiments.

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