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磨损表面形貌对液压泵滑靴副自适应摩擦特性的影响分析

Impact Analysis of Worn Surface Morphology on Adaptive Friction Characteristics of the Slipper Pair in Hydraulic Pump.

作者信息

Liu Siyuan, Yu Chunsong, Ai Chao, Zhang Weizhe, Li Ziang, Zhang Yongqiang, Jiang Wanlu

机构信息

Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control, School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China.

State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang Univershity, Hangzhou 310027, China.

出版信息

Micromachines (Basel). 2023 Mar 19;14(3):682. doi: 10.3390/mi14030682.

DOI:10.3390/mi14030682
PMID:36985089
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10051339/
Abstract

The hydrostatic bearing slipper pair of the hydraulic pump has a unique adaptive friction characteristic, which has a better friction reduction and anti-wear ability than the general sliding friction pair, and also has a certain recovery effect on the performance degradation caused by the early wear of the slipper. This paper attempts to reveal the friction adaptive mechanism. Based on the fractal theory, two fractal parameters of fractal dimension and scale coefficient are used to characterize the surface morphology of the slipper mathematically, and the adaptive friction mechanism model is established by combining the friction coefficient equation. The effects of different fractal parameters on the friction coefficient and other performance parameters of slipper pairs are obtained by means of the numerical analysis method. The wear test was carried out by replacing specimens at different intervals to observe the worn surface morphology and the degradation process of the slipper to verify the correctness of the theoretical results. The results show that the friction performance and load-bearing capabilities of the slipper can be recovered to a certain extent within a short period when early wear occurs, and its surface performance shows the variation characteristics of deterioration-repair-re-deterioration-re-repair.

摘要

液压泵的静压支承滑块副具有独特的自适应摩擦特性，其减摩和抗磨能力优于一般的滑动摩擦副，并且对滑块早期磨损导致的性能退化具有一定的恢复作用。本文试图揭示其摩擦自适应机制。基于分形理论，利用分形维数和尺度系数这两个分形参数对滑块表面形貌进行数学表征，并结合摩擦系数方程建立自适应摩擦机制模型。通过数值分析方法得到不同分形参数对滑块副摩擦系数及其他性能参数的影响。通过不同时间间隔更换试件进行磨损试验，观察滑块磨损表面形貌及退化过程，以验证理论结果的正确性。结果表明，早期磨损发生时，滑块的摩擦性能和承载能力在短时间内可得到一定程度的恢复，其表面性能呈现出劣化 - 修复 - 再劣化 - 再修复的变化特征。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5012/10051339/e3a73548badb/micromachines-14-00682-g019.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5012/10051339/91c9874d89b2/micromachines-14-00682-g011.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5012/10051339/9080f6613476/micromachines-14-00682-g015.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5012/10051339/5444fa0e6ef3/micromachines-14-00682-g016.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5012/10051339/da736578dea1/micromachines-14-00682-g017.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5012/10051339/957e23392af6/micromachines-14-00682-g018.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5012/10051339/e3a73548badb/micromachines-14-00682-g019.jpg

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