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).
Analysis of oil leakage from a shaft gland, comparing a standard felt-packed gland with a spring-loaded version.
| Identifier | ExFiles\Box 55\3\ Scan095 | |
| Date | 6th March 1926 guessed | |
| contd :- -4- casing is regulated by burners. It is found that a really good shaft bearing at 10°C becomes quite slack at 50°C and that this rise in temperature in consequence greatly facilitates the leakage of oil through the gland. The standard test is heating the case to 50°C and rotating the shaft for 10 mins. under a pressure of 30 lbs/sq.in. The standard gland under these conditions loses 1070 drops of oil or 25 c.c. This is when it is packed with felt. A spring loaded gland also packed with felt under similar conditions lost 67 drops or 1.6 c.c. that is 1/16 of the amount. The gland and the case was countersunk to give two 48° pressure angles as in the sketch. Unless the flange is a reasonable thickness it buckles if any pressure is put on the gland, and some pressure is always required to prevent oil leaks. contd :- Diagram 1 Text: TO TYRE PUMP TRAY TO CATCH OIL LEAKING FROM GLAND SHORT LEVER TO ROTATE SHAFT TEMPERATURE REGULATION Diagram 2 Text: .125 FELT PACKING 3 COILS 10 S W G 30 LBS LOAD C.S EXISTING BUSH 45° BUCKLE. OIL LEAK | ||