There is an increasing demand for the on-line condition monitoring of lubricating oils. In our recent research, we considered various sensor principles for the on-line monitoring of thermal aging of engine oils. One of the investigated parameters is the viscosity of the lubricating oil, which can be efficiently measured using microacoustic sensors. Compared to conventional viscometers, these se...

Polyethylene glycol is a ubiquitous, water-soluble, organic compound found in a wide variety of commercially available products. While generally a benign substance, in rare instances, it can induce hypersensitivity reactions. Herein, we describe a case of anaphylaxis to polyethylene glycol-containing lubricating gel used for a transvaginal ultrasound. This case highlights the importance of earl...

bstract Solid lubricating coatings comprise a large segment of tribological materials and under a spherical contact the coating/substrate interface xperiences cyclic shear stress that leads to delamination of the coatings from the substrate and premature failure. The polymeric solid lubricating oating used in this study is an expanded PTFE/epoxy composite. The coatings experience cumulative dam...

In recent years many researchers show a high interest in co-digestion, simultaneous anaerobic decomposition of a homogenous mixture of at least two biodegradable waste. Anaerobic codigestion is reported to offer several benefits over digestion of separate materials, such as increased cost-efficiency, increased biodegradation of the treated materials, as well as increased biogas production. Most...

wind gearbOx technOLOgy is developing at a fast pace, not least due to operators demanding ever more power and efficiency. Experience has shown that the lubricant used is a crucial factor in meeting the wish for ever-increasing performance. Besides strictly technical requirements, aspects of economy and ecology are receiving more and more attention in lubricant selection. The technical requirem...

The development of special grease makes it possible for angular contact ball bearings to operate at high speed and temperature, so, become necessary investigate thermal-fluid characteristics inside high-speed bearing lubricated with grease. In this paper, a simulation model was established CFD software Fluent, the heat-fluid-solid coupling method used analyze distribution flow grease, heat tran...