Tribology assessment of surface-contact sliding pairs with streak defect under dynamic harmonic excitation loading
Abstract
Purpose
Streak defect and dynamic harmonic excitation (DHE) loading play important roles in machine operating conditions. The purpose of this paper was to assess the effects of streak defect and DHE loading on the tribological properties of surface-contact friction pairs, for example the differential gear end-face on the washer, via experimental investigation.
Design/methodology/approach
Streak defect was artificially introduced into the washer surface, which was loaded with DHE loads produced by a spring-connecting weight system. The wear scar of the washers and the monitored friction force signals were respectively scanned using scanning electron microscope (SEM) and analyzed using wavelet simulation.
Findings
The friction force curves, SEM images and discrete wavelet transform results indicate that DHE loading tends to increase friction force, to accelerate plowing damages and result in side-flow of material and plastic deformation on the surfaces of the washer. Whereas, streak oil-channel textures on washer specimen can be machined to modify the lubrication condition in the running-in stage so as to improve the tribological properties of the sliding pairs which were even subjected to DHE loading.
Originality/value
On the basis of this thesis research, the effect of streak defect and DHE loading on tribological performance of surface-contact sliding pairs is discussed. The results of wear form and friction state with the effect of streak defect and DHE loading facilitate to optimize the operating condition of mechanical parts.
Keywords
Acknowledgements
This work has been partly supported by the National Natural Science Foundation of China (No. 51175406), and the specimens was supplied by the Shaanxi HanDe Axle Co., Ltd. The constructive comments from the reviewers and editors are sincerely appreciated.
Citation
Yuan, W., Dong, G., Chin, K.S., Hua, M. and Guo, Q. (2018), "Tribology assessment of surface-contact sliding pairs with streak defect under dynamic harmonic excitation loading", Industrial Lubrication and Tribology, Vol. 70 No. 3, pp. 481-489. https://doi.org/10.1108/ILT-10-2016-0250
Publisher
:Emerald Publishing Limited
Copyright © 2018, Emerald Publishing Limited