Development and manufacturing an automated lubrication machine test for nano grease

摘要

The present work deals with the development of nanocomposite grease to reduce friction and wear between two contact surfaces such as the components of engine, cams, gears, and bearing. The tribological and rheological characteristics of nano grease with a new design of automated lubricant machine tests were evaluated. In this paper, a manual Reicher test machine is converted to an automatic machine by an electric actuator, which used to convert the load from manual to automatic. Calcium grease containing a different concentration of titanium dioxide and carbon nanotubes TiO2/CNTs (0.5, 1, 2, 3, 4wt. %) was successfully prepared. The tribological and rheological characteristics of the nano grease were investigated under different temperatures. The morphologies and chemical composition of the worn surface and the wear mechanisms were also discussed at different loads. X-ray diffraction (XRD) and scanning electron microscope (SEM) analysis were used to analyze the microstructure of the nano additives and nano grease. The result shows that the optimal concentration of TiO2/CNTs was 3wt%, which reduces the wear and coefficient of friction about 72.3 and 60 %, respectively. Furthermore, the apparent viscosity and shear stress are increased by 48.2 and 74.2 %, respectively.