Analyses of the Long-Term Performance and Tribological Behavior of an Axial Piston Pump Using Diamondlike-Carbon-Coated Piston Shoes and Biodegradable Oil

Kalin, Mitjan; Majdič, Franc; Vižintin, J.; Pezdirnik, J.; Velkavrh, Igor

doi:10.1115/1.2805442

Cited by 25 publications

(12 citation statements)

References 13 publications

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“…8. This beneficial effect of green lubrication was also proved in several applications, such as gears [40], grinding machines [41] and hydraulics [42].…”

Section: Biodegradable Oilsmentioning

confidence: 82%

Green Tribology for the Sustainable Engineering of the Future

Kalin

Kus

Majdič

2019

SV-JME

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Environmental awareness and especially the legislation that requires the reduction of polluting emissions are strong driving forces toward more sustainable engineering and greener solutions in the design, use and overall life span of machinery. However, providing novel concepts that will exclude non-environmentally adapted, but over many years developed and optimized solutions, is not an easy task. It clearly requires time if the same level of technical performance is to be maintained. Green tribology is one of the fields that has been closely involved in these actives in the past two decades. The research and use of tribology science and technology toward green and sustainable engineering include natural material usage, lower energy consumption, reducing natural oil resources, reducing pollution and emissions, fewer maintenance requirements and thus reduced machinery-investment cycles. This report is not an attempt to cover all the existing concepts, attempts or literature available in the field, but mainly those efforts that our group has been working on over the past 20 years, which mainly includes novel green-lubrication concepts that come from exploring and exploiting surface engineering through the use of diamond-like-carbon (DLC) coatings.

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“…8. This beneficial effect of green lubrication was also proved in several applications, such as gears [40], grinding machines [41] and hydraulics [42].…”

Section: Biodegradable Oilsmentioning

confidence: 82%

Green Tribology for the Sustainable Engineering of the Future

Kalin

Kus

Majdič

2019

SV-JME

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“…Diamond-like carbon (DLC) is one of the possible solutions for improving tribological conditions in contacts [20][21][22]. DLC significantly diminishes friction and wear, not just under oil-lubricated conditions [23][24][25], but also under water-lubricated conditions [26][27][28]. Very in-depth tribological analyses regarding DLC in water were conducted by Ohana [29][30][31][32] in recent years.…”

Section: Introductionmentioning

confidence: 99%

Influence of a Diamond-Like Carbon-Coated Mechanical Part on the Operation of an Orbital Hydraulic Motor in Water

Strmčnik

Majdič

Kalin

2019

Metals

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The increasing focus on reducing the environmental impact of hydraulic applications has driven efforts to apply new surface-engineering technologies and replace classic lubricants with alternative solutions. In particular, water has gained increasing attention in recent years. However, water has very poor lubrication properties and, especially in combination with steel/steel contact, it leads to severe tribological behavior. A literature review and preliminary research showed that appropriate surface engineering regarding diamond-like carbon (DLC) coatings represents a promising solution to overcome the limitation of steel/steel contacts in water. Basic tribological ball-on-disc tests were performed. The result of the tribological investigation showed that there was very low friction and wear in the steel/DLC contact in water. This was our motivation for using DLC coating in a real hydraulic application. The DLC was deployed on the floating outer ring, so steel/DLC contacts between the floating outer ring and three other important parts were created. It was proven that the poor lubrication properties of the water were overcome with appropriate surface engineering. In such a case, the hydraulic motor operated satisfactorily when the water was applied as a working fluid.

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“…The problem is the risk of pollution to the environment and especially the spoiling of drinking water. One so-called "soft" solution is the use of biodegradable hydraulic oils [3][4][5][6][7][8], but here the problem is with the additives, which tend not to be totally degradable. For this reason, in the early 1990s, many countries [2,9,10] began with research into the possibilities of using tap water as a hydraulic fluid.…”

Section: Introductionmentioning

confidence: 99%