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).
Page discussing oil leakage in bearings, with a graph showing calculated oil pressure versus RPM due to centrifugal force.
| Identifier | ExFiles\Box 178\1\ img139 | |
| Date | 19th May 1926 | |
| - 6 - Hs{Lord Ernest Hives - Chair}/ACL/T19.5.26. Leakage takes place at all these bearings, particularly so at the "big ends" where the normal oil pressure is augmented by the centrifugal force exerted on the oil in the crankshaft. The adjoining diagram shews the pressure calculated to be due to this. [GRAPH] Title: CALCULATED OIL PRESS AT BIG ENDS DUE TO CENTRIFUGAL FORCE Y-axis label: Lbs/□" Y-axis values: 0, 10, 20, 30 X-axis label: R.P.M. X-axis values: 0, 500, 1000, 1500, 2000, 2500, 3000 OIL FLOW THROUGH THE BEARINGS. It can be taken generally that the total amount of oil discharged through the bearings will depend chiefly upon:- 1. The Bearing Clearances. 2. The Oil Pressure. 3. The Viscosity. The oil discharged will be approximately proportional to the bearing clearance, other factors remaining constant. It will also be approx. proportional to the square root of the pressure and from this relationship we observe that the former exerts the contd. | ||