Patent GB-191300804-A (GB)
Title: Improvements in and relating to Marine Turbine Installations.
Inventor: PARSONS CHARLES ALGERNON
IPC: B63H23/00
Filed: 1913-01-10
Granted: 1914-01-08
Abstract: 804. Parsons, Sir C. A., Cook, S. S., and Chapman, E. B. Jan. 10. Plant; driving and transmission mechanism, special application of. -In a marine turbine installation of the type comprising a main turbine system and an independently - operable cruising system, the auxiliary condensing- plant of the vessel is arranged to form the condensing-plant of the cruising system. The turbines of the cruising system drive a propeller shaft or shafts through single reduction gearing, clutch devices interlocked with the admission valves being provided to connect and disconnect the main and cruising turbine systems with and from the propeller shafts. Each ot the four propeller shafts a, b, c, d is driven by a separate main turbine system comprising a highpressure turbine e, an intermediate turbine f, and two low-pressure turbines g, h receiving the steam in parallel from the turbine f. An astern turbine i is incorporated with each turbine g, h. All the turbines in each main system are geared to their respective main driving- shaft k which is connected through a clutch l in the case of the propeller shafts a, d, and through a clutch L in the case of the shafts b, c. For use at speeds between the maximum and cruising speed, a turbine m is added to the turbines e, f, g, h in the case of the centre pair of shafts b, c. These shafts b, c are also arranged to be driven by a cruising turbine system comprising a highpressure turbine o, an intermediate turbine p, and two low-pressure turbines q, r each incorporating an astern turbine s. The turbines q, r exhaust into a condenser arranged to operate as the auxiliary condensing-plant when the vessel is in port. The turbines of the cruising system are connected through gearing t to sleeves u which can be connected to the shafts b, c by clutches L. A suitable clutch device, Fig. 6, comprises toothed collars x, y on the shaft b arranged opposite toothed collars 7, z secured respectively to a sleeve 6 and the driving-shaft k of the main turbine system. The sleeve 6 carries a wheel 5 which is driven through a pinion shaft 4 by the shaft of one of the cruising turbines. By means of interconnected clutch sleeves 1, 8 the main turbine system may be coupled to the shaft b through the collars y, z, and the cruising system uncoupled through the collars 7, x, or vice versa. The clutch devices are interlocked with the valves of the installation by connecting the operating-arm 14, Figs. 7 and 8, of the clutch sleeves through worm and bevel gearing with spindles 19, 20 carrying worms 24, 25 in conjunction with the main-system astern and ahead valves 26, 27 and worms 28, 42 in conjunction with the cruising-system ahead and astern valves 29, 43. These worms 24, 25, 28, 42 operate the locking-devices of their respective valves. Thus the worm 24 engages a worm-wheel 30, Fig. 9, the rotation of which causes a screw-threaded pin 31 to move axially and enter a hole in and thereby lock a segmental member 34 geared to the valve-operating spindle 37. The interlocking gear is so arranged that steam can only be admitted to the main or cruising system when the corresponding clutches are engaged.