Industrial Lubrication and Tribology

WYLLIE, D.

doi: 10.1108/eb053002pmid: N/A

This is a companion article to Grease Pumpability by Dr. Wyllie that appeared in our JanuaryFebruary issue. That article discussed the factors governing the flow properties of grease and stated how this data could be used to assess the suitability of systems for dispensing greases. The present article deals with work done on oil separation from greases subjected to pressure, especially in springloaded grease cups and describes a special test unit for this work. The results show the effect of pressure and temperature and the greater resistance to oil separation of greases containing high viscosity oil.

doi: 10.1108/eb053003pmid: N/A

A RECENT paper given to The Institute of Marine Engineers by Comm. K. I. Short, O.B.E., D.S.C., R.N., was concerned with operational experiences with medium speed Diesel engines and referred to several instances in which lubrication design could be improved. His first comments referred to lubricating oil pumps. Instances were quoted in which in order to avoid an unnecessary extra the electrically driven system was adopted with the lubricating oil fed from essential services. Lack of electrical power or reduction of oil pressure shut down the engine but in practice there have been a series of incidents involving loss of pressure and failure to shut down the engine causing bearing damage. The author believed that the failures reported are enough to demand engine driven primary lubricating oil pumps as a prudent precaution, and especially in nonreversing engines.

Willmer, S.W.

doi: 10.1108/eb053004pmid: N/A

Until comparatively recently, consistency, worked and unworked penetration of a grease were useful indications of its performance ability. Present day requirements of machine tools, and the sophisticated grease formulations available, make these indications of little real value to machine designers. As machine design advances it is increasingly important that lubricants are given attention at the drawing board stage and not left until the test runs. Lubricants must be dimensionally included in design procedures. Whilst lubricants can be so included, it is not so easy for grease, at least not so easy if using the rules still in use to identify its characteristics. This article suggests a method for identifying the important physical characteristics of grease in units more appropriate to those used in modern machine design.

doi: 10.1108/eb053005pmid: N/A

THIS seal testing machine has been designed and developed with the object of providing means for the fully automatic testing of seals in accordance with all known test specifications. The machine is offered to both users and manufacturers of seals and has programming facilities for the automatic testing of seals under widely varying simulated conditions. The makers, George Angus & Co. Ltd., Angus House, Westgate Road, NewcastleuponTyne remind interested buyers that the simpler and less expensive Mk. II tester is still available and is adequate for most purposes.

doi: 10.1108/eb053006pmid: N/A

IN A paper describing the GlacierHerbert System of sterngear design, presented by C. W. Herbert and A. H. Hill The Glacier Metal Co. Ltd. to The Institute of Marine Engineers on 25th January 1972 in London, the authors had this to say about sterngear seals in general.

doi: 10.1108/eb053007pmid: N/A

SAID by Fram Filters to be the world's first system of filtration to reclaim oil from water, completely and economically, this method will virtually eliminate the possibilities of complaints about oil contaminant in water discharged into seas and rivers. The Fram oily water separator system, designed for use aboard ships and in all types of process industries, will remove oil down to 5 pp, or less.