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).
Test report on a Ph.II Water Pump, specifically its Thermoflex Bellows and Carbon Gland.
| Identifier | ExFiles\Box 149a\1\ scan0063 | |
| Date | 29th March 1935 | |
| To E.{Mr Elliott - Chief Engineer} c. to By.{R.W. Bailey - Chief Engineer} X1262 Hs{Lord Ernest Hives - Chair}/WB.{Mr Brazier/Mr Bell}14/KW.29.3.35. Lec.3829 Ph.II Water Pump. Thermoflex Bellows and Carbon Gland. Further to previous report 13.11.34. The pump was reassembled with a BZ/PC rotor EX.16533, and an S.A.L. shaft E.85423, also a new bellows E.85425. The carbon thrust faces were carefully bedded, and polished to a mirror finish. The light thrust spring - 6 lb. - was refitted, but the clearance of the carbon bellows ring was not modified. Circumstances prevented the testing being performed in one continuous run, but eventually a total of 50 hrs. at 4500 P.R.P.M. against 10 lb/sq.in. delivery pressure at a temperature of 95°C. to 100°C. was completed, the pump being then stripped and examined. Throughout the test the gland remained perfectly sound, also the previous experience of the carbon thrust bush rotating when the pump was hot was not repeated. The general condition of the pump was excellent. When parted, the carbon ring and rotor gland faces were perfectly free from either oil or water. Both gland faces had lost their original mirror finish and were very lightly scored. The carbon thrust face still retained evidence of the original mirror finish, but had one or two light rings in its surface, the steel thrust face being correspondingly marked. The latter also showed signs of slight overheating. It was originally intended to fill the lubricator tube at the commencement of the test, and leave it unattended for the remainder of the run. It was however filled a second time, when restarting after the test had been suspended - i.e., after 18 hrs. running - the remaining 32 hours being completed without further attention to the lubrication. Both bushes and shaft were well lubricated when examined, although the tube itself was empty. Hs{Lord Ernest Hives - Chair}/W.Bell. | ||