中国炼油与石油化工 ›› 2014, Vol. 16 ›› Issue (01): 90-95.

• Lubrication Research • 上一篇    下一篇

矿物润滑油在薄膜润滑区域内的摩擦特性研究

张杰,官婷婷,朴吉成   

  1. 中国石油大连润滑油研发中心
  • 收稿日期:2013-09-11 修回日期:2013-10-25 出版日期:2014-03-30 发布日期:2014-03-30
  • 通讯作者: 张杰 E-mail:zhangjie2_rhy@petrochina.com.cn
  • 作者简介: Zhang Jie Telephone:+86-411-86774576; E-mail:zhangjie2_rhy@petrochina.com.cn
  • 基金资助:
    中国石油天然气集团公司项目

Research on Friction Properties of Mineral Lubricants in Thin-film-lubricating Regime

Zhang Jie,Guan Tingting,Piao Jicheng   

  1. Dalian Lubricant R&D Institute, PetroChina
  • Received:2013-09-11 Revised:2013-10-25 Online:2014-03-30 Published:2014-03-30
  • Contact: Zhang Jie E-mail:zhangjie2_rhy@petrochina.com.cn

摘要: 在薄膜润滑区间内,流体层(无序层)、有序层和吸附层对润滑油摩擦特性的研究有所报道。本实验借助高频往复试验机得出不同黏度矿物油及其中加入不同剂量添加剂后的μ-L(摩擦系数和载荷)关系曲线,并且利用QCM-D考察了添加剂在不锈钢表面的吸附能力。从Stribeck曲线及薄膜润滑理论模型得出以下结论:(1)利用球-盘接触的高频往复试验机得出的μ-L关系曲线和L0、μ0等参数可以用于矿物油的摩擦特性研究;(2)较低黏度基础油在薄膜润滑区间内保持较低摩擦系数;(3)添加剂中的极性基团在金属表面形成有序吸附层,可以降低摩擦系数。在薄膜润滑区域,有序分子极性、分子层厚度以及在金属表面饱和度影响润滑油的摩擦特性。不同添加剂在表面上的竞争吸附以及吸附分子层数的确定是今后研究重点。

关键词: 吸附油膜, 薄层润滑, 石英微天平, Stribeck曲线, 矿物润滑油

Abstract: On the basis of thin film lubrication theory, the influence of fluid film (disordered film), ordered film and adsorbed film on tribological behaviors of lubricating oil in TFL was studied. The μ-L (friction coefficient versus load) curves of different viscosity and additive dosage were obtained by a high frequency reciprocating test rig and the adsorption capacity of additive on steel surface were measured by QCM-D. Based on Stribeck curve and thin film lubrication theory model, some conclusions can be drawn that (1) The μ-L curves and the parameters of L0 and μ0, resulted from high frequency reciprocating test rig with ball-disc contact, can be used to study tribological behaviors of lubricating oil in TFL. (2) Comparing with high viscosity base fluid, low one can enter into TFL regime under lower load and keeps lower friction coefficient in TFL.(3) The polar molecules in additive produce ordered adsorbed layer on steel surface to reduce friction coefficient. And in TFL, molecule polarity, layer thickness and saturation degree on steel surface probably influence lubricants tribological behaviors between the moving interfaces. While the further study would be focused on competitive adsorption of different additives, formation of dual- and/or tri-molecule adsorption layers, and other aspacts.

Key words: adsorption film, thin film lubrication, quartz crystal micro-balance with dissipation Monitoring (QCM-D), Stribeck curve, mineral lubricants