GB616152A - Improvements in or relating to internal-combustion engines of the turbine type - Google Patents

Abstract

616,152. Gas-turbine plant for jet-propulsion. COHEN, H. Aug. 29, 1946, No. 25990. [Classes 110 (i) and 110 (iii)] The air-compressor and turbine rotors are in one piece. The compressor draws in air through radial passages in the turbine stator blades and discharges it through radial passages in the turbine rotor blades. In the plant shown in Figs. 3 and 8, discs 23 carry pump impeller blades 24-27 and turbine blades 32. Air reaches the blades 27 by ports 7, the blades 24, by similar ports in the end wall 3 and the blades 25, 26 by ports 16 and passages 40 in the stator blades 37. Air passes from the impellers through passages 34 in the turbine rotor blades 32 to volute chambers 10, 11 and thence to a pre-heating coil 14 within the combustion chamber 15 and is discharged from the coil into the chamber. The products of combustion pass through nozzles 43 to the turbine blading and are discharged from the end chamber 17. The discharge may be axial into a propulsion jet formed with the end wall 3. In another plant, Fig. 10, air enters a first-stage impeller 70 through the space within the combustion chamber 15a, is driven by blades 72 through the passages 32b in the turbine rotor blades and is further impelled by blades 73 before reaching the volute chamber 11a. From this chamber the air passes inwardly through passages in the turbine stator blades to the eye of the second-stage impeller 71. It is then further compressed by means of the bladings 72 and passes through the blades of the second turbine rotor ring to the outer impeller blading 73. Thence it passes to the volute chamber 10a, to the pre-heating coil 14a and is discharged into the combustion chamber 15a. The housing of the bearing 5b is supported by radial plates 74 from the combustion chamber inner wall. In a third plant, the air, after passing through the impeller which is combined with the turbine rotor, is further compressed in one side of a double entry centrifugal compressor. Air from the atmosphere is compressed by the other side of the compressor and the two sides discharge into a common bladed diffuser.