硬脂酸吸附对轴承限量供油润滑影响

doi:10.3901/JME.2023.15.197

机械工程学报 ›› 2023, Vol. 59 ›› Issue (15): 197-203.doi: 10.3901/JME.2023.15.197

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硬脂酸吸附对轴承限量供油润滑影响

樊赛生¹, 郭峰¹, 荆兆刚¹, 栗心明¹, 刘海超², POLL G²

1. 青岛理工大学机械与汽车工程学院青岛 266520;
2. 汉诺威莱布尼兹大学机械设计与摩擦学研究所汉诺威 201204 德国

收稿日期:2022-08-06 修回日期:2023-01-18 出版日期:2023-08-05 发布日期:2023-09-27
通讯作者: 郭峰(通信作者),男,1968年出生,博士,教授,博士研究生导师。主要研究方向为油膜润滑的光学测量和理论分析工作。E-mail:mefguo@qut.edu.cn
作者简介:樊赛生,男,1996年出生。主要研究方向为弹流润滑界面效应。E-mail:1530516566@qq.com
基金资助:
国家自然科学基金(52175173，51875299)和中德合作交流(M0380)资助项目

Effect of Stearic Acid Absorption on Bearing Performance with Limited Lubricant Supply

FAN Saisheng¹, GUO Feng¹, JING Zhaogang¹, LI Xinming¹, LIU Haichao², POLL G²

1. School of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao 266520;
2. Institute of Mechanical Design and Tribology, Leibniz University, Hannover 201204 Germany

Received:2022-08-06 Revised:2023-01-18 Online:2023-08-05 Published:2023-09-27

摘要/Abstract

摘要： 在限量供油条件下利用全轴承摩擦力矩测量系统和球-环点接触油膜润滑测量仪分别对PAO10(聚α-烯烃)和PAO10S(聚α-烯烃+0.2%w/w硬脂酸)进行摩擦力矩和膜厚测量。结果表明:轴承摩擦力矩先下降后上升,存在一个对应最小摩擦力矩的临界转速。当转速低于临界转速时,PAO10S的摩擦力矩随供油量增加而减小,且明显小于PAO10的摩擦力矩。当转速高于临界转速时,PAO10S和PAO10的摩擦力矩差别减小。PAO10S产生的轴承摩擦力矩降低归因于硬脂酸吸附膜的低剪切抗力,更重要的是,因吸附膜产生润滑轨道表面能的降低,导致摩擦副的入口供油情况得到改善。润滑油膜厚度的光干涉测量结果显示,因硬脂酸的吸附PAO10S和PAO10的供油状态可分为三个区,全轴承摩擦力矩的测试结果与这三个区对应的油膜承载特性相关。

关键词: 摩擦力矩, 硬脂酸, 限量供油, 吸附膜, 临界转速

Abstract: The friction torque and the film thickness of PAO10 (poly-α-olefin) and PAO10S (poly-α-olefin + 0.2% w/w stearic acid) are measured using a full-bearing test rig and a optical ball-on-ring oil film test rig under conditions of limited oil supply, respectively. The results show that with the increase of the rotational speed, the frictional torque of the bearing first decreases and then increases, and there is a critical rotational speed at the minimum frictional torque. When the speed is lower than the critical speed, the frictional torque of PAO10S decreases with the increase of the oil supply, and is much smaller than that of PAO10. The reduced friction torque of the bearing by the PAO10S can be attributed to the low shear strength of the stearic acid adsorption film, and more important is the improved oil supply at the inlet from the enhanced replenishment on the lubrication track by the low surface energy by the stearic acid adsorption. The lubrication status of the PAO10 and PAO10S can be divided into three zones by the interference measurement of the lubrication film thickness, and the friction torque of the full bearing is closely correlated to the load-carrying capacity of the lubrication films in the three zones.

Key words: frictional torque, stearic acid, limited lubrication supply, adsorption film, critical speed

中图分类号:

TH117

樊赛生, 郭峰, 荆兆刚, 栗心明, 刘海超, POLL G. 硬脂酸吸附对轴承限量供油润滑影响[J]. 机械工程学报, 2023, 59(15): 197-203.

FAN Saisheng, GUO Feng, JING Zhaogang, LI Xinming, LIU Haichao, POLL G. Effect of Stearic Acid Absorption on Bearing Performance with Limited Lubricant Supply[J]. Journal of Mechanical Engineering, 2023, 59(15): 197-203.

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硬脂酸吸附对轴承限量供油润滑影响

Effect of Stearic Acid Absorption on Bearing Performance with Limited Lubricant Supply

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