Industrial Lubrication and Tribology

Hakan Kaleli

2001 Industrial Lubrication and Tribology

doi: 10.1108/00368790110408337

Two 10W30 mineral‐base phosphorus containing (commercial) and phosphorus‐free (P‐Free) crankcase oils were tested in the engine dynamometer for the poisoning effects on a catalytic converter and emission‐engine’s performance. The emission results of the two oils were compared with and without a catalytic converter, including the light‐off temperature of the catalyst. Surface characterisation was used to determine accumulated catalyst poisoning from the oil additives. The performance analysis shows that the catalytic converter lowers the torque and power for the commercial and P‐Free oils, whereas the specific fuel consumption increases for both oils in the presence of the catalytic converter. In both cases of the presence and the absence of catalytic converter the torque, power and specific fuel consumption remain the same for phosphorus containing and P‐Free oils. The presence of the catalytic converter shows lower HC and CO and higher CO 2 emissions for both P‐Free and commercial oils. Surface characterisation using x‐ray microanalysis techniques of Scanning Electron Microscopy and indicated residual amounts of poisons, predominantly P, Ca, S and Zn deposited on the catalyst.

P.S. Mukherjee

2001 Industrial Lubrication and Tribology

doi: 10.1108/EUM0000000006008

Looks at the use of lubrication in the maintenance of mining equipment through the examination of five case studies of mines from different areas and their consumption of lube oil. Concludes that a suitable management of lubricant consumption plays an important role in production costs and optimization.

Jerry C.T. Su; K.N. Lie

2001 Industrial Lubrication and Tribology

doi: 10.1108/EUM0000000006009

Investigates rotation effects on hybrid plain journal bearings with various feeding mechanisms, i.e. orifice, capillary and porous feedings. Employs the numerical method of the finite difference to solve Reynolds equations. Shows that higher speed of rotation induces greater hydrodynamic load capacity, especially with an eccentricity ratio ॉ > 0.85. The porous and orifice feedings also result in higher load capacity than orifice and capillary feedings when the rotation speeds increase. Also analyses the multi‐array of hole‐entry of orifice and capillary feedings and the results show that the bearings with more arrays of feedings produce higher load capacity at low speed. However, the bearings with fewer arrays of feedings produce higher load capacity at high speeds. In other words, the transition from the hydrostatic to hydrodynamic load capacity of the bearing is significant to hybrid plain journal bearings.

Roy Morledge; Frank Jackson

2001 Industrial Lubrication and Tribology

doi: 10.1108/EUM0000000006010

Quantifiable data in a report by the Environment Agency of England and Wales entitled Water Pollution Incidents in England and Wales 1997 identifies over 3,723 substantiated pollution incidents across England and Wales in 1997. The construction industry was the most frequent polluter responsible for 22 percent of all substantiated water‐related pollution incidents in the “Industry” sector. Also 28 percent of all substantiated pollution incidents across England and Wales are directly attributable to mineral‐based fuels and oils, many of which are used extensively within the construction industry. Seeks to locate the possible causes and effects for some of that oil‐based pollution, discusses the issues and identifies a client‐motivated solution to reduce and mitigate the undesirable impacts upon the environment. One particularly aggressive pollutant – hydraulic oil – remains annually, unaccounted for. Hydraulic oil is used in most tracked earthmoving machinery; machinery most closely associated with construction work carried out near to watercourses. Biodegradable hydraulic oil is much more considerate to the environment, but is more expensive and not usually installed in new plant and machinery. Argues that on a life cycle basis the use of biodegradable oil is viable and feasible and external factors make its usage desirable.