Presented in this article is a new method to measure the film thickness rolling bearing running under starved conditions, such as grease-lubricated bearings, using electrical capacitance method. The was used study impact of speed on thickness. Results show that fully flooded conditions prevail at lower speeds where increases with increasing speed. At higher speeds, bearings run lubrication incr...

The study of the properties consistent and liquid oils is currently receiving much attention in tribology. This because lubrication one most effective ways to improve machine durability. At same time are practically no mathematical descriptions mechanisms grease lubrication, which necessary for predicting calculating wear machines. When studying surfaces under boundary conditions, it know stiff...

This dissertation aims to develop new condition-based maintenance (CBM) tools for increasing performance of Apache helicopter drivetrain gearboxes, through lubrication and signal analysis. An extensive consumer of CBM is the Apache helicopter that involves testing critical components to demonstrate reliability and performance, measured through data-driven condition indicators (CIs). These indic...

Several industrial applications require bearings to work under slow oscillating motions and very high contact pressures (aircraft actuators, wind turbine, robotic arms, etc.). Hence, a boundary lubrication regime predominates. However, grease provides the essential assure bearing integrity. In this study, mechanisms involved in protecting surfaces are investigated. High loaded movements have be...

Abstract Developing lubricants with good electrical conductivity and tribological properties is necessary for the power equipment. Here, niobium selenide (NbSe 2 ) boron nitride (BN) were employed to act as additives fabricate lubricating greases superior properties. The grease containing different concentrations of synthesized their conductivities measured by a volume resistance meter at room ...

In this paper the authors theoretically evaluated film thickness in a miniature angular contact ball bearing grease and oil lubricated conditions correlated with variation of electrical resistance experimentally determined by using tribometer CETR UMT-2. For considering base viscosity. The rotational speed inner race varied between 1 500 rpm axial load applied on 7000C was 8.1 N. IVR EHD lubric...