Experimental study on the suspension stability and tribological properties of nano-copper in LCKD-320 # lubricating oil
- PDF / 1,263,587 Bytes
- 10 Pages / 595.276 x 790.866 pts Page_size
- 40 Downloads / 170 Views
ORIGINAL ARTICLE
Experimental study on the suspension stability and tribological properties of nano‑copper in LCKD‑320# lubricating oil Qiong Wang1 · Liang Wang1 · Shi‑long Zhao1 · Zhao Meng1 Received: 5 June 2020 / Accepted: 3 September 2020 © King Abdulaziz City for Science and Technology 2020
Abstract Nano-copper has proven that it has an excellent contribution to the friction-reduction, anti-wear and extreme pressure properties of lubricant, as the lubricating oil additive. However, there are few studies on the application of nano-copper in full formulated lubricating oils. The suspension stability and tribological properties of LCKD-320# lubricating oil with nanocopper of varying concentrations were investigated. The results demonstrated that the nano-copper was synthesized via the liquid-phase reduction method with the average particle size of 128 nm. The additions of Tween80 and Span80 were 2 wt% of nano-copper, respectively, which can maintain a most suitable dispersity and stability. When the addition of nano-copper was 0.3 wt%, the friction coefficient under the load of 20 N and the wear scar area (S) were decreased by 25% and 54.4%, respectively, and the maximum non-seizure loads (PB) was increased by 33% as compared with original LCKD-320# lubricating oil. Testing results showed that the LCKD-320# lubricating oil with or without nano-copper both were conformed to the national lubricant standards. The present work will extend the application of nano-copper additive and introduce a new approach to lubricity for the coal mine machinery in future technological areas. Keywords Nano-copper · LCKD-320# lubricating oil · Dispersity and stability · Friction · Extreme pressure and wear
Introduction The energy consumption and material loss are mostly caused by friction and wear for mechanical products (Carpick et al. 2016). The coal mining machinery has a poorer working environment, harsher conditions and longer running time compared with other types of machinery (Chen and Xu 2010). Better lubrication for coal mine machinery has great significance to improve the working efficiency, extend the operating life, and avoid equipment failures and components damage (Fan and Liu 2009). LCKD-320# lubricating oil consists of base oil (90–95%) blending with additives (10–5%), which is mainly used for anti-wear, friction-reducing and prolong the operating life of the reducer for coal mine machinery. The purpose of additives is to improve the behavior of the LCKD-320# lubricating oil. The traditional additives containing S, P, Cl, etc. * Zhao Meng [email protected] 1
College of Materials Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, Shaanxi, China
have gradually failed to meet the requirements of environmental protection and severe lubrication under extreme pressure, high-speed and -temperature conditions. For example, (1) The viscosity of lubricating oil is dropped rapidly or even lubricant does not provide effective support between components, during the high temperature fric
Data Loading...
