This work reports on the performance enhancement of a real-scale hydraulic system consisting of diamondlike-carbon (DLC)-coated components in combination with biodegradable oil in long-term experiments under conditions simulating those in an actual application. The performance of a hydraulic axial piston pump with DLC-coated piston shoes was evaluated in a newly designed, dedicated hydraulic test system using fully formulated biodegradable, synthetic ester oil. For comparison, an equal but separated hydraulic system with a conventional commercial pump and stainless-steel shoe surfaces was tested. The tests were run at 85% of the maximum pump load and an oil temperature of around for a period of , which corresponds to more than of continuous operation in an application. A major abrupt oxidation-induced degradation of the oil did not occur in either system; however, the oil from the system comprising the DLC-coated shoes showed noticeably and consistently better results. The wear of the DLC-coated shoes, especially during the running in, was much lower than that in the conventional steel system. Only minor polishing wear was observed on the DLC shoe’s sliding surfaces during the test period, while on the steel shoe’s surfaces, many scratches were found and some erosion of the edges was detected.
Skip Nav Destination
e-mail: mitjan.kalin@ctd.uni-lj.si
Article navigation
January 2008
Research Papers
Analyses of the Long-Term Performance and Tribological Behavior of an Axial Piston Pump Using Diamondlike-Carbon-Coated Piston Shoes and Biodegradable Oil
M. Kalin,
M. Kalin
Centre for Tribology and Technical Diagnostics,
e-mail: mitjan.kalin@ctd.uni-lj.si
University of Ljubljana
, Bogisiceva 8, 1000 Ljubljana, Slovenia
Search for other works by this author on:
F. Majdič,
F. Majdič
Centre for Tribology and Technical Diagnostics,
University of Ljubljana
, Bogisiceva 8, 1000 Ljubljana, Slovenia
Search for other works by this author on:
J. Vižintin,
J. Vižintin
Centre for Tribology and Technical Diagnostics,
University of Ljubljana
, Bogisiceva 8, 1000 Ljubljana, Slovenia
Search for other works by this author on:
J. Pezdirnik,
J. Pezdirnik
Centre for Tribology and Technical Diagnostics,
University of Ljubljana
, Bogisiceva 8, 1000 Ljubljana, Slovenia
Search for other works by this author on:
I. Velkavrh
I. Velkavrh
Centre for Tribology and Technical Diagnostics,
University of Ljubljana
, Bogisiceva 8, 1000 Ljubljana, Slovenia
Search for other works by this author on:
M. Kalin
Centre for Tribology and Technical Diagnostics,
University of Ljubljana
, Bogisiceva 8, 1000 Ljubljana, Sloveniae-mail: mitjan.kalin@ctd.uni-lj.si
F. Majdič
Centre for Tribology and Technical Diagnostics,
University of Ljubljana
, Bogisiceva 8, 1000 Ljubljana, Slovenia
J. Vižintin
Centre for Tribology and Technical Diagnostics,
University of Ljubljana
, Bogisiceva 8, 1000 Ljubljana, Slovenia
J. Pezdirnik
Centre for Tribology and Technical Diagnostics,
University of Ljubljana
, Bogisiceva 8, 1000 Ljubljana, Slovenia
I. Velkavrh
Centre for Tribology and Technical Diagnostics,
University of Ljubljana
, Bogisiceva 8, 1000 Ljubljana, SloveniaJ. Tribol. Jan 2008, 130(1): 011013 (8 pages)
Published Online: December 26, 2007
Article history
Received:
March 6, 2007
Revised:
August 14, 2007
Published:
December 26, 2007
Citation
Kalin, M., Majdič, F., Vižintin, J., Pezdirnik, J., and Velkavrh, I. (December 26, 2007). "Analyses of the Long-Term Performance and Tribological Behavior of an Axial Piston Pump Using Diamondlike-Carbon-Coated Piston Shoes and Biodegradable Oil." ASME. J. Tribol. January 2008; 130(1): 011013. https://doi.org/10.1115/1.2805442
Download citation file:
Get Email Alerts
Related Articles
Catalytic Effect of Several Metals on the Oxidation of Lubricating Oils
Trans. ASME (January,1952)
Modelling a Variable Displacement Axial Piston Pump in a Multibody Simulation Environment
J. Dyn. Sys., Meas., Control (July,2007)
The Shaft Torque of a Tandem Axial-Piston Pump
J. Dyn. Sys., Meas., Control (May,2007)
Physical Limitations for the Bandwidth Frequency of a Pressure Controlled, Axial-Piston Pump
J. Dyn. Sys., Meas., Control (November,2011)
Related Proceedings Papers
Related Chapters
Introduction I: Role of Engineering Science
Fundamentals of heat Engines: Reciprocating and Gas Turbine Internal Combustion Engines
Positive Displacement Pumps
Pumps and Compressors
Later Single-Cylinder Engines
Air Engines: The History, Science, and Reality of the Perfect Engine