A baseline theory is developed in this paper for the design of oil-lubricated centrally pivoted plane-pad thrust bearings. By focusing on the hydrodynamics generated by the viscosity-temperature effects of the lubricating oil, a mathematical model is derived with a single dimensionless parameter Wth. The nominal value of Wth is 0.1 for typical pad bearings in current industrial practice. The th...

The spherical pump is a totally new hydraulic concept, with piston and hydrostatic bearing, in order to eliminate the direct contact between cylinder cover. In this paper, governing Reynolds equation under coordinates has been solved bearing characteristics are systematically investigated. operating sensitivities of proposed respect radius, film beginning angle, ending thickness, temperature, s...

The impact of start-stops on the thickness lubricating films in Elasto-Hydrodynamic Lubrication (EHL) contacts grease lubricated rolling bearings is different from that oil bearings. This paper shows film drops to zero quickly due absence hydrodynamic effects during a stop. It increases an unexpected large value when bearing stopped for long time and started up again, although this only lasts v...

Abstract Sliding and spinning behaviors significantly affect the performance of rolling bearings, especially for dry-lubricated micro macro sliding may lead to increased wear solid lubricating film. A unified contact tribology analytical model is proposed angular ball bearings (ACBBs) considering extreme conditions including high combined loads effects. comprehensive solution framework ensure r...

Castor oil plant seeds (Ricinus communis L.) were grown in spent lubricating oil (SLO) contaminated soil at concentrations of 1-6% (w/w, oil/soil). Plant height and stem girth were depressed by spent lubricating oil at concentrations of 2% (w/w) and above. One percent (1%) spent lubricating oil in soil promoted growth of plants when compared with control. Fresh and dry weights of R. communis pl...

Sintering of metal powders is a well-established industrial process for specific applications, which allow a cheap series production of metal parts even with complex shape. The residual porosity, always present in sintered power compacts, limits their mechanical strength. On the other hand, for several products such porosity is needed. Products of that kind are for example: metal filters showin...

WASTE OIL RECOVERY. Prior to 1960, a significant portion of the demand for automotive lubricating oil was met by re-relined used oil. At the time, 150 re-refineries produced 300 million gal of motor oil annually. Since 1960, however, the production of re-refined oil has steadily declined. In 1981, for example, out of about 1.2 billion gal of automobile lubricating oil and 1.6 billion gal of ind...