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Influence of a diamond-like carbon-coated mechanical part on the operation of an orbital hydraulic motor in water
Strmčnik, Ervin (Author), Majdič, Franc (Author), Kalin, Mitjan (Author)

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Abstract
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.

Language:English
Keywords:diamond-like carbon, efficiency, orbital hydraulic motor, surface engineering, water
Work type:Article (dk_c)
Tipology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Year:2019
Number of pages:14 str.
Numbering:Vol. 9, iss. 4, art. 466
UDC:539.92:62-761:544.227(045)
ISSN on article:2075-4701
DOI:10.3390/met9040466 This link opens in a new window
COBISS.SI-ID:16590107 This link opens in a new window
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Downloads:34
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Record is a part of a journal

Title:Metals
Shortened title:Metals
Publisher:MDPI
ISSN:2075-4701
COBISS.SI-ID:15976214 This link opens in a new window

Document is financed by a project

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Project no.:1000-18-0510

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:22.04.2019

Secondary language

Language:Slovenian
Keywords:diamantu podobne prevleke, izkoristki, orbitalni hidravlični motorji, inženiring površin, voda

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