Investigation of friction in rectangular Nitrile-Butadiene Rubber (NBR) hydraulic rod seals for defence applications

Bhaumik, Shankar; Kumaraswamy, A.; Guruprasad, SA; Bhandari, Prabhakar

doi:10.1007/s12206-015-1026-9

Cited by 17 publications

(15 citation statements)

References 3 publications

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“…When the oil seal oil pressure was 10, 20, and 30 MPa, and the rod speed was 0.12 m/s, the thickness of the oil film at the seal‐rod interface is analyzed and calculated. The effects of contact pressure, surface roughness, and intermolecular interaction of seal rod on the friction of NBR rectangular hydraulic bar seal were studied 14 . Meanwhile, another finite element model of the O‐ring based on ANSYS was established 15 to analyze the contact situation of the O‐ring, and the contact situation was used to analyze the friction characteristics of the O‐ring under oil lubrication.…”

Section: Introductionmentioning

confidence: 99%

Multiscale simulation on dynamic friction behavior of cylinder sealing rings under hydrothermal aging

Luo

Teng

et al. 2021

J of Applied Polymer Sci

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The friction behavior of cylinder seal greatly affects the dynamic position accuracy of the cylinder execution terminal under hydrothermal aging. So, the hydrothermal aging test, friction test, tensile and compression test, topography analysis and infrared spectroscopy analysis, and multiscale simulation were carried out for studying the effect of the hydrothermal aging on the friction performance of cylinder seal. It was found that when the aging temperature increases from 40 to 80°C, the dynamic friction forces of the cylinder seals increase by more than 15%; the friction force increases with the increasement of the initial mechanical stress. Aging makes rubber to be brittle and more cavities on the fracture surface and reduces the fractured activation energy of the nitrile rubber molecular chain.

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Section: Introductionmentioning

confidence: 99%

Multiscale simulation on dynamic friction behavior of cylinder sealing rings under hydrothermal aging

Luo

Teng

et al. 2021

J of Applied Polymer Sci

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“…Many published research about the reciprocating seals, such as the O-ring [ 5 ], VL seal [ 6 , 7 ], and so on [ 8 , 9 ], have clarified the relationships between the performance with the operating conditions. With improvements in the laser surface processing technology, laser texturing surface for improving the performances of mechanical components has attracted extensive attention [ 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

A Numerical Wear Simulation Method of Reciprocating Seals with a Textured Rod

2020

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Reciprocating rod seals are widely used in the hydraulic actuator to prevent the leakage of fluid. The sealing lip profile changes with the seal wear, resulting in an increase in the leakage. A texturing rod changes the lubrication characteristics of the seal, so it affects the wear and leakage of the seal. A numerical simulation method is proposed to investigate the wear of the hydraulic reciprocating seal with textured rods. Several kinds of macro-cavity textures on the rod surface, including circle, square and triangle shapes, have been simulated and discussed. The effects of three shape parameters including area ratio, depth, and ratio of the axial length to the circumferential length on the seal wear are analyzed in detail. The texturing rod slightly increases the seal wear, but decreases the seal leakage. When the rod speed is increasing, the wear time rates of the seal increase, while the wear distance rates decrease, regardless of the texture shapes. When the texture area ratio is increasing, the wear of the reciprocating seal increases. Seal wear decreases with an increasing texture depth during the outstroke, however, it increases during the instroke. The ratio of the axial length of the macro-cavity to the circumferential length has no effect on the seal wear.

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“…Rubber seals are usually used in the form of O-rings and gaskets in hydraulic, fuel, and lubricating systems in modern automobile applications. 1–3 One of the important problems in hydraulic and lubricating systems of machinery equipment is fluid leakage from the rubber seals. The leakage of fluids can result in the losses of energy, cost, and machinery damage.…”

Section: Introductionmentioning

confidence: 99%

“…4 These properties are important and need to be studied, this is referred to as the relationship between mechanical and tribological properties of rubber seal materials. 1,2,5 Previous studies [6][7][8][9] have shown that the mechanical and tribological properties of rubber composites could be improved by incorporation of reinforcing additives, such as, carbon black (CB), carbon nanotube (CNTs), and graphite. However, most recent literature 10,11 have indicated that the investigations on such relationship between fillers and rubber matrices, and reinforcement mechanism are still open for wide discussion.…”

Section: Introductionmentioning

confidence: 99%

“…a reduction in filler particle size). 6,[13][14][15][16][17][18][19][20] Bhaumik et al 2 reported that the abrasive wear resistances of styrenebutadiene rubber (SBR) and butadiene rubber (BR) were improved by addition of CB. By co-reinforcing CB with graphite, the wear resistance and friction properties could be further enhanced, this effect was found by Wang et al 8 for NBR.…”

Section: Introductionmentioning

confidence: 99%

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Tribological properties of carbon nanotube as co-reinforcing additive in carbon black/acrylonitrile butadiene rubber composites for hydraulic seal applications

Jansinak

Markpin

Wimolmala

et al. 2018

Journal of Reinforced Plastics and Composites

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This work investigated the cure characteristic, physical mechanical properties, and tribology behavior of carbon black filled acrylonitrile butadiene rubber composites using multi-walled carbon nanotubes as co-reinforcing additive in various contents from 0, 3, 6, 9, and 15 parts per hundred rubbers. The physical and tribological behavior was also observed in large-scale piston driven hydraulic apparatus which was specially designed for seal applications. The results suggested that the modulus and hardness were found to increase after adding multi-walled carbon nanotube whereas the tensile and tear strength were not significantly affected. Adding multi-walled carbon nanotube was found to increase the bound rubber and crosslink density. For ball-on-disc tribo-testing, it was found that the coefficient of friction of the rubber composites decreased with multi-walled carbon nanotube content and the applied loads whereas the specific wear rate was more influenced by the applied loads used. Finally, under the large-scale piston driven hydraulic test apparatus in comparison with commercial grade rubber seals, it was found that the weight loss for the acrylonitrile butadiene rubber composites with multi-walled carbon nanotube was much lower than that without multi-walled carbon nanotube. The carbon black/acrylonitrile butadiene rubber composites with 9–12 parts per hundred rubbers multi-walled carbon nanotube were recommended as the most suitable for hydraulic seal applications.

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Investigation of friction in rectangular Nitrile-Butadiene Rubber (NBR) hydraulic rod seals for defence applications

Cited by 17 publications

References 3 publications

Multiscale simulation on dynamic friction behavior of cylinder sealing rings under hydrothermal aging

Multiscale simulation on dynamic friction behavior of cylinder sealing rings under hydrothermal aging

A Numerical Wear Simulation Method of Reciprocating Seals with a Textured Rod

Tribological properties of carbon nanotube as co-reinforcing additive in carbon black/acrylonitrile butadiene rubber composites for hydraulic seal applications

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