Numerical Simulation on Lubrication and Experiment Study on Tribology Improvement of Slipper Pair at Low Speeds

A mixed lubrication model for the slipper pair of an electric piston pump is proposed to solve problems such as inadequate lubrication, extreme friction, and wear at near-zero and low speeds. The lubrication characteristics of the slipper pair were numerically calculated and simulated, and the frict...

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Bibliographic Details
Published in:Tribology transactions 2024-11, Vol.67 (6), p.1132-1146
Main Authors: Fang, Yanfei, Lin, Mingzhi, Lin, Tianliang
Format: Article
Language:English
Subjects:
Epoxy resins
Footwear
Friction
Low speed
Mechanical properties
Molybdenum disulfide
MoS
near-zero and low speed
Piston pumps
Self lubricating materials
Self lubrication
Slipper pair
Surface properties
tribological design
Tribology
Wear
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Summary:A mixed lubrication model for the slipper pair of an electric piston pump is proposed to solve problems such as inadequate lubrication, extreme friction, and wear at near-zero and low speeds. The lubrication characteristics of the slipper pair were numerically calculated and simulated, and the frictional characteristics in the low-speed range were analyzed. A self-lubricating and antiwear slipper pair was developed to mitigate severe friction and wear at near-zero and low speeds. To improve the tribological properties of slippers, various concentrations of molybdenum disulfide (MoS 2 ) powder mixed with epoxy resin (EP) were used as self-lubricating materials. The content of MoS 2 ranged from 1 and 20 wt%. The optimal content of MoS 2 was obtained by conducting frictional tests on the slipper pair samples as well as material examination and analysis of the slipper sample surfaces before and after the surface characterization tests. The lubrication mechanisms of the self-lubricating and antiwear slippers were determined. The EP/MoS 2 composite lubricating materials exhibited excellent self-lubricating and antiwear properties, providing a new direction for the optimized design of slipper pairs and other important friction pairs in piston pumps and promising research prospects.
ISSN:1040-2004
1547-397X
DOI:10.1080/10402004.2024.2409912