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).
Design of Enots nipples for axle lubrication and issues with non-return ball valves.
| Identifier | ExFiles\Box 51\3\ Scan136 | |
| Date | 22th May 1929 | |
| To DA. {Bernard Day - Chassis Design} from Hs {Lord Ernest Hives - Chair} /CY. c. to BY. {R.W. Bailey - Chief Engineer} X4900. Hs {Lord Ernest Hives - Chair} /Gyl/LG22.5.29. DESIGN OF ENOTS NIPPLES FOR AXLE LUBRICATION. The fitting of air reservoirs to conserve the oil pressure on the axle lubrication systems has shewn up a fault in the nipple design which did not trouble us previously - the non-return ball valve will not always hold against the back pressure in the system. We have successfully used a special 'non-return' type of Enots fitting (F.10089) which embodies a further non-return valve in addition to the ball valve, and this we use on the mechanic's joints as a guarantee against oil being flung out by centrifugal force. We have therefore approached Messrs. Benton & Stone who designed this valve with a view to them putting additional non-return mechanism into the special nipples we use for the axle, and they have agreed to make us samples. The question of providing a filter behind the nipple on the rear axle was also considered. The nipple gets very dirty and we cannot run the risk of the drip plugs being stopped up. Enots have agreed to make a similar but smaller model of the unit on the front. We can then advise customers to throw away the felt after a certain time and fit a new one at trifling cost. These units will then comprise :- contd :- | ||