From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Effectiveness of a beveled lower scraper ring in preventing overoiling.
| Identifier | ExFiles\Box 77\3\ scan0270 | |
| Date | 19th January 1923 | |
| To BJ. from R.{Sir Henry Royce} c. to CJ. LHS.{Lord Herbert Scott} c. to BY.{R.W. Bailey - Chief Engineer} Wor.{Arthur Wormald - General Works Manager} c. to Hs.{Lord Ernest Hives - Chair} EP.{G. Eric Platford - Chief Quality Engineer} c. to E.{Mr Elliott - Chief Engineer} Da.{Bernard Day - Chassis Design} X4224 R10/M19.1.23. RE. OVEROILING. X.4224. X.4225. With reference to overoiling, we cannot understand why the bevel on the lower scraper ring should be advantageous from an overoiling point of view. We can understand however that it would increase the unit pressure of the ring on the cylinder walls by simply reducing the area of the surface in contact with the cylinder walls, in which case it wouldn't matter whether the bevel was on the upper or lower side, and could we think be proved to the be more efficient when it is on the upper side of the ring. It would also suggest that if the ring could be kept at its present narrow width and made to give heavier pressure on the cylinder walls by more elasticity or depth, the amount of oil passing the ring would be less. Experiments verifying these views, or otherwise, should be made. R.{Sir Henry Royce} | ||