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)

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
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2019
• Number of pages: 14 str.
• Numbering: Vol. 9, iss. 4, art. 466
• PID: 20.500.12556/RUL-132324
• UDC: 539.92:62-761:544.227(045)
• ISSN on article: 2075-4701
• DOI: 10.3390/met9040466
• COBISS.SI-ID: 16590107
• Publication date in RUL: 21.10.2021

Record is a part of a journal

• Title: Metals
• Shortened title: Metals
• Publisher: MDPI AG
• ISSN: 2075-4701
• COBISS.SI-ID: 15976214

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

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: 1000-18-0510