Patent GB-425164-A (GB)
Title: Improvements in apparatus for generating combustion products under pressure for driving turbines or the like
IPC: F02C5/12
Filed: 1933-08-30
Abstract: 425,164. Gas turbines. BROOKE, F. M., Morris Avenue, Bryn Mawr, Pennsylvania, U.S.A. Aug. 30, 1933, No. 24071. Convention date, Sept. 2, 1932. [Class 110 (iii)] [See also Group XII] Apparatus for generating combustion products under pressure for driving a multi-stage turbine or like prime mover includes a primary igniter chamber serving sequentially a number of combustion chambers, ported rotary sleeve valves controlling the combustion and igniter chambers and conduit means from the combustion chambers serving to exhaust the combustion products at different pressures for utilization in the prime mover. As shown each igniter chamber 15, Fig. VII is provided with an inlet port for high grade fuel to be fired by a spark plug 39 and outlet ports 33, 34 controlled by a sleeve valve 14 provided with gear teeth 36 at the base for rotation by a worm. Each chamber 15 co-operates with two combustion chambers 1, Figs. V and VI each provided with a sleeve valve 7 adapted to be constantly rotated through gear teeth 9 to control an inlet port 16 for fuel oil, an inlet port 17 from the igniter and a series of outlet ports 19-23 adapted to be opened in succession. The chambers 1 are provided with sparking plugs 15 for use with high grade fuel if desired in which case the ports of the igniter chambers are kept closed. As shown in Fig. I the corresponding exhaust ports from a series of combustion chambers are connected to manifolds 30 and 41-44 leading to the head and succeeding stages of a turbine 3 (not shown). The first several series of rotor and stator blades of the turbine and also the combustion chambers 1 are watercooled. A mixture of fuel and air is supplied to the chambers 1 from a blower or atomizer 52 through a conduit 24 and to the igniter chambers from a blower or atomizer 54 through a conduit 55. As the speed of the plant increases, the sleeve valves rotate at greater speed and in order to allow the same time interval for the combustion and the building up of pressure within the chambers 1 the sleeve valves of the igniters are automatically advanced relatively to the sleeve valves of the chambers 1 as the speed increases. This is effected by a governor device 74, Fig. XIV comprising spring balanced weights 81 adapted to be moved outwardly by centrifugal force thus drawing up an internally threaded casing 86 relatively to an externally threaded shaft engaging therein. A relative rotation of the shaft and casing is thus produced. In the form shown in Fig. I a shaft 57 carrying worms engaging with the gear teeth at the bases of the combustion chamber valves, the shafts of the blowers and the shaft of a distributer 89 are driven by chain drives from an extension shaft 61 of the turbine. A shaft 361 driving the sleeve valves of the igniter chambers is coupled by a chain 571 with the distributer shaft. The governor 74 is placed in the shaft 57 and in this form serves to retard the valves 7. In a modified form, Fig. IV, two parallel rows of combustion and igniter chambers are provided and the manifolds are dispensed with, the individual exhaust ports being connected directly to the injectors for the different stages of the turbine. The shafts driving the igniter valves are coupled to the extension shaft 61 by chains 59 and the shafts 57 are driven from the shaft 61 by way of a chain 71, governor 74 and shafts 69 and 66 coupled together and to the shaft 57 by bevel gears.