Comparative study of materials for friction pairs in a new high water-based hydraulic motor with low speed and high pressure
Industrial Lubrication and Tribology
ISSN: 0036-8792
Article publication date: 4 December 2018
Issue publication date: 25 January 2019
Abstract
Purpose
Aiming at improving the mechanical efficiency, the applicability and the working life of high water-based hydraulic motor (HWBHM) under working conditions at low speed and high pressure, the friction performance of different matching materials for piston slipper – crankshaft pair with high water-based hydraulic fluid (HWBHF) under working conditions at low speed and high pressure – were studied.
Design/methodology/approach
The friction experiments for different materials (316L, 316L with surface coating OVINO – tetrahedral amorphous carbon [TAC; 316L-TAC] – 316L with surface coating OVINO-graphite intercalated compound [GIC; 316L-GIC] and polyetheretherketone [PEEK] reinforced with 30 per cent carbon fiber [PEEK-30CF]) under HWBHF lubrication were implemented on a pin-disk friction abrasion machine to determine the variations of coefficient of friction (CoF) and wear rate for each matching materials. In addition, the roughness and the morphology of worn surface of different matching materials were quantitatively characterized.
Findings
The study revealed that material combinations have different friction performances. Test results showed that the abrasion of matching type stainless steel (SS) and SS is rather serious, and the method of surface coating could improve the friction performance of SS when friction with other materials. For matching type of SS with surface treatment (SS-ST) and SS-ST, 316L-GIC and 316L-GIC have relatively stable CoF, and the wear rate was smaller than other matching materials, while 316L-TAC and 316L-TAC has the smaller CoF than that of 316L-GIC. Matching materials 316L-GIC with PEEK-30CF of matching type SS-ST and PEEK-30CF has more stable COF and better wear resistance than those of other matching materials.
Originality/value
This research has laid a foundation for the improvement of service life and working efficiency of friction pair in HWBHM under working conditions at low speed and high pressure.
Keywords
Acknowledgements
The author gratefully acknowledges the National Science Foundation of China (51675519), China, Postdoctoral Science Foundation (2018M630676) and a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) for supporting this work.
Citation
Qiu, B., Zhao, J. and Man, J. (2019), "Comparative study of materials for friction pairs in a new high water-based hydraulic motor with low speed and high pressure", Industrial Lubrication and Tribology, Vol. 71 No. 1, pp. 164-172. https://doi.org/10.1108/ILT-01-2018-0006
Publisher
:Emerald Publishing Limited
Copyright © 2018, Emerald Publishing Limited