GB570935A - An internal combustion turbine - Google Patents

Abstract

570,935. Gas turbines. PICKETT, A. L., and HAMBLEN, D. Oct. 25, 1943, No. 17506. [Classes 57 and 110 (iii)] A turbine rotor 59 is keyed to a shaft 35 connected by a variable-speed coupling 30, 33 to a compressor shaft 1, driving one or more compressors, for example a piston compressor 113. Each combustion chamber 22 is cut off periodically by a hydraulically-operated valve 23 which is lifted against the relieved oil pressure, by expansion of fired gases. The rotor. 59 preferably comprises side-by-side discs adapted to be coupled together by dogs 60 at the inner faces and movable into engagement by relative rotation between the two discs, and pinned together by dowels 71. Cooling passages 61, 62 are provided in the rotor, and 72 in the casing 64. In one form the compressor pistons 12 are driven by means of a wobble plate 5, Fig. 1a, coupled to the shaft 1 and to piston rods 7. Parts 8, 9 have rolling engagement. The induction of combustible mixture or air into each cylinder 13 through a port 14, and the transfer of the compressed charge, or air, through a port 21 to a combustion chamber 22, Fig: 2, are controlled, preferably, by a ported sleeve valve 16. This valve is given an elliptical movement by a link 18, connected to an extension 16<1> by a ball- and-socket joint 20, and to the wobble plate. A rotary valve may be used in place of the sleeve valve. Each compressor 113 delivers into a separate combustion chamber 22 and the burnt charge is, led to a nozzle 28. Where air is delivered, a charge of fuel is injected into 22. Each piston 12 sweeps out its entire cylinder during each stroke. The coupling 30 may be a hydraulic coupling of the slipping clutch type (gearwheel pump or vaned-pump), the relative speeds being varied by controlling the slip. As shown a gear 34 is fixed to the turbine shaft 35 and - drives idler gears 34<1>. The gear pump draws oil from a sump S through a pipe 36, space 37, Fig. 1a, holes 39 and cavity 40 to an inlet 54 by way of a rotary distributor leading to a governor value 51. The oil from the cavity 40 passes a non-return valve and is led to a rotary distributor 25, Fig 5, for the operation of the valves 23 controlling the nozzle passages. The distributor, is driven by a shaft 43 and bevel gearing 44 from the shaft 1, the gearing also driving the Spark distributor 69, or a fuel-injection pump. Each connection 26 leads to a valve 23 When combustion commences in a chamber 22, the oil pressure on 23 is relieved by connection of the oil supply line with an exhaust 27. The oil pressure line to 54, Fig. 1 is connected to an outlet 55 when a governor valve 51 is lifted by extra speed causing the weight 50 to be projected outwards, connecting ports 52, in the valve, to the ports 54, 55. Downward pressure of a spring 57, on the valve, may be varied by rotation of a screw 58 which is connected with the turbine throttle valve. Release of oil through the port 55 relieves the back-pressure on the pump-coupling, and the compressor is driven at a slower speed. The pistons of the compressor may be double-acting to supply two sets of combustion chambers. Oil from the pump is used to lubricate the bearings. The turbine unit may be fitted to a vehicle.