硅酸盐学报

蒙脱石/二烷基二硫代磷酸钼复合润滑油添加剂的摩擦学性能

PDF下载

康向南 ¹ , 钟升旭 ¹ , 丁锐 ¹ , 马军 ¹ , 李梁 ² , 朱玉芹 ²

硅酸盐学报 | 研究论文 2024,52(1): 170-179

收起

硅酸盐学报 |研究论文 2024 , 52 (1) : 170 -179

蒙脱石/二烷基二硫代磷酸钼复合润滑油添加剂的摩擦学性能

全屏

康向南¹, 钟升旭¹, 丁锐¹, 马军¹, 李梁², 朱玉芹²

作者信息

^1．国家能源集团宁夏煤业公司枣泉煤矿，宁夏灵武 750409

^2．中煤科工机器人科技有限公司，广东深圳 518052

通讯作者:

朱玉芹（1988—），女，副研究员。

作者简介:

康向南（1987—），男，工程师

Tribological Properties of Montmorillonite/Molybdenum Dialkyl Dithiophosphate Composite Lubricant Additives

Xiangnan KANG¹, Shengxu ZHONG¹, Rui DING¹, Jun MA¹, Liang LI², Yuqin ZHU²

Affiliations

^1.Zaoquan Coal Mine of Ningxia Coal Industry Co., Ltd., China Energy Investment, Lingwu 750409, Ningxia, China

^2.China Coal Technology and Engineering Group Robot Technology Co., Ltd., Shenzhen 518052, Guangdong, China

Corresponding Author:

ZHU Yuqin (1988-), female, Associate Professor. E-mail: cz610179@163.com

KANG Xiangnan (1987-), male, Engineer. E-mail: kangxiang_nan@126.com

出版时间: 2024-01-20 doi: 10.14062/j.issn.0454-5648.20230458

文章导航

摘要

收起

添加剂是改善润滑油性能的重要手段，对蒙脱石（MMT）和有机钼复合润滑油添加剂的减摩抗磨性能进行了研究，期望取得较单一添加剂更优异的润滑效果，提高机械设备在恶劣工况下的运行稳定性和安全性。研究结果表明：有机钼中的二烷基二硫代磷酸钼（MoDDP）和MMT作为单一润滑油添加剂均表现出较好的润滑性能，随着MMT和MoDDP添加质量分数的增加，摩擦系数和磨斑直径呈现先降低后升高的趋势，MMT和MoDDP的最佳添加质量分数分别为3.0%和1.5%。与基础油相比，1.5% MoDDP可分别降低41.0%的摩擦系数和48.9%的磨斑直径，3.0% MMT可分别降低40.6%的摩擦系数和48.2%的磨斑直径。与单一添加剂MMT、MoDDP相比，3.0% MMT/1.5% MoDDP复合添加剂可进一步改善润滑油的减摩抗磨性能，相较于基础油，可分别降低56.3%的摩擦系数和52.3%的磨斑直径。MMT和MoDDP具有优良的润滑性能和协同作用，润滑过程中能生成MoS₂、MoO₂、FeS₂、Fe₂O₃化学反应膜和SiO₂物理吸附膜，能够有效地降低摩擦、减少磨损。

关键词

蒙脱石 / 二烷基二硫代磷酸钼 / 复合润滑油添加剂 / 减摩抗磨

Abstract

收起

Introduction

Machinery and equipment are prone to equipment failure and even safety accidents caused by insufficient lubrication under severe working conditions. Adding additives with some superior performance in lubricant is an effective approach to improve the lubricant performance, reduce the friction and wear, and extend the service life of machinery. Lubricants are widely used in machinery and equipment as an important method of anti-wear and friction reduction. Silicate minerals are harmless to the environment and the humanbeing. A low roughness, high hardness friction reaction film can be formed by silicate minerals as lubricant additives during the lubrication process, which can effectively reduce wear. Organic molybdenum as a commonly used lubricant additive has superior antioxidant properties, and can decompose when pressure, temperature and other conditions meet the requirements, and then lead to a chemical reaction and form the protective film containing molybdenum elements, thus preventing the surface oxidation reactions to improve the tribological properties of the lubricant. In this paper, the friction and wear reduction properties of composite lubricant additives of montmorillonite (MMT) and organomolybdenum were investigated to obtain superior lubrication, thereby improving the operational stability and safety of machinery and equipment under severe operating conditions.

Methods

The lubrication performance of three molybdenum-based lubricants, i.e., MoDDP (C₂₈H₆₀O₄P₂S₄Mo), MoDTC (C₃₄H₇₂Mo₂N₂O₂S₆) and RS-568, was evaluated by a four-ball friction and wear tester to determine the organic molybdenum type and the optimal mass fraction of organic molybdenum in the composite lubricant additives. Tribological tests were then carried out on lubricant samples at different concentrations of MMT to determine the optimal mass fraction of MMT in the composite additives. After the preparation of the composite additive, the lubricating properties of the MMT/MoDDP composite additives were examined, and the friction reduction and anti-wear mechanism of the composite additive was investigated by energy dispersive spectroscopy, X-ray photoelectron spectroscopyand Raman spectroscopy.

Results and discussion

The results show that among the organic molybdenum additives, molybdenum dialkyldithiophosphate (MoDDP) exhibits the optimum lubricant properties. The friction coefficient and wear spot diameter firstly decrease and then increase with the increase in the mass fraction of MMT and MoDDP in the oil, and the optimal mass fractions of MMT and MoDDP are 3.0% and 1.5%, respectively. Compared with the base oil, the friction coefficient is reduced by 41.0% and the wear spot diameteris decreased by 48.9% for oil sample at 1.5% MoDDP, and the friction coefficient is reduced by 40.6% and the wear spot diameter is decreased by 48.2% for the oil sample at 3.0% MMT.

Compared with the oil samples at 3.0% MMT, the friction coefficient and the wear spot diameter was reduced by 26.3% and 7.9%, respectively, for the oil sample with the composite additives. Compared with the oil samples at 1.5% MoDDP, the friction coefficient and the wear spot diameter are reduced by 26.6% and 6.6%, respectively, for the oil sample with the composite additives. The 3.0% MMT/1.5% MoDDP composite lubricant additives can further improve the friction reduction and anti-wear performance of the lubricant. Compared with the base oil, the friction coefficient and wear spot diameter are reduced by 56.3% and 52.3%, respectively, for the oil sample with the composite additives.

During the friction process, a SiO₂ physical adsorption film was deposited on the friction surface due to the adsorption property of MMT additives. Under the action of shear force, the layered MMT particles are subjected to shear, resulting in an interlayer slip, which can reduce the friction between the contact surfaces. The fractured MMT particles are mechanically filled in the surface wear area to improve the carrying capacity of the oil film. Moreover, a layered MoS₂ film with a low shear strength and a high melting point can be generated due to the chemical reaction of the MoDDP additive. Also, the MoO₂, FeS₂, Fe₂O₃ metal compound reaction film can be generated to prevent the direct contact of the friction interfaces. Although the single additive has a great lubrication effect, the MMT and MoDDP composite additives show a better lubrication performance and synergistic effects in the friction process. The composite metal compound layer and the physical adsorption film can be generated during friction to form the high load-bearing capacity of the lubricant film, thus increasing the strength and stability of the lubricant film, and it was able to continuously and effectively reduce friction and wear. The friction tests also verify that MoDDP and MMT have a positive synergistic effect in the friction process. During the lubrication process, chemical reaction films with MoS₂, MoO₂, FeS₂, and Fe₂O₃ and SiO₂ physical adsorption films were generated, thus effectively reducing thefriction and wear.

Conclusions

The 3.0% (in mass fraction) MMT/1.5% (in mass fraction) MoDDP composite additives exhibited the better lubricating properties, compared with a single additive. It was indicated that the MMT/MoDDP composite lubricant underwent a chemical reaction during the friction process, which produced molybdenum sulfides and oxides containing molybdenum (MoS₂, MoO₂) and iron sulfides and oxides containing FeS₂, Fe₂O₃, as well as physically adsorbent films containing SiO₂. The compound lubrication film could effectively reduce the friction of the interface.

Key words

montmorillonite / molybdenum dialkyldithiophosphate / composite lubricant additives / friction reduction and anti-wear

引用本文

康向南, 钟升旭, 丁锐, 马军, 李梁, 朱玉芹. 蒙脱石/二烷基二硫代磷酸钼复合润滑油添加剂的摩擦学性能. 硅酸盐学报, 2024 , 52 (1) : 170 -179 . DOI: 10.14062/j.issn.0454-5648.20230458

Xiangnan KANG, Shengxu ZHONG, Rui DING, Jun MA, Liang LI, Yuqin ZHU. Tribological Properties of Montmorillonite/Molybdenum Dialkyl Dithiophosphate Composite Lubricant Additives[J]. Journal of the Chinese Ceramic Society, 2024 , 52 (1) : 170 -179 . DOI: 10.14062/j.issn.0454-5648.20230458

基金

收起

国家重点研发计划(2022YFB4703602)

参考文献

收起

文献

收起

参考文献引证文献

排序方式：

2024年第52卷第1期

PDF下载

引用本文

BibTeX

文章信息

doi: 10.14062/j.issn.0454-5648.20230458

接收时间：2023-07-01
首发时间：2026-10-22
出版时间：2024-01-20

补充材料

相关文章

文章信息

作者

出版历史

收稿日期：2023-07-01
修回日期：2023-08-10

基金

国家重点研发计划(2022YFB4703602)

作者信息

^1．国家能源集团宁夏煤业公司枣泉煤矿，宁夏灵武 750409

^2．中煤科工机器人科技有限公司，广东深圳 518052

通讯作者:

朱玉芹（1988—），女，副研究员。

参考文献

分享链接

https://castjournals.cast.org.cn/joweb/gsyxb/CN/10.14062/j.issn.0454-5648.20230458

分享至

全文二维码

扫描看全文

引用本文

BibTeX

本文的引用情况

2种不同金属材料的力学参数

科 Family	属数 Number of genus	种数 Number of species	占总种数比例 Percentage of total species (%)	属 Genus	种数 Number of species	占总种数比例 Percentage of total species (%)
鹅膏菌科Amanitaceae	2	11	5.26	鹅膏菌属 Amanita	10	4.78
小菇科 Mycenaceae	2	12	5.74	丝盖伞属 Inocybe	5	2.39
多孔菌科 Polyporaceae	8	14	6.70	蜡蘑属 Laccaria	5	2.39
红菇科 Russulaceae	3	23	11.00	小皮伞属 Marasmius	6	2.87
				小菇属 Mycena	11	5.26
				光柄菇属 Pluteus	5	2.39
				红菇属 Russula	17	8.13
				栓菌属 Trametes	5	2.39

关闭全屏

BibTeX
EndNote
RefWorks
TxT