GB381699A - Improvements in or relating to rotary engines operating with or upon an elastic fluid - Google Patents

Abstract

381,699. Turbines ; centrifugal and screw fans. BERTIN, G., 189, Rue du Faubourg St-Denis, Paris. Sept. 21, 1931, No. 26401. Convention date, Sept. 22, 1930. [Classes 110 (i) and 110 (iii).] In a turbine or rotary compressor the fluid, as it travels along the pressure channels between the rotor and the casing, is caused to undergo a thermo-dynamic transformation accompanied by a volumetric variation of the walls of said pressure channels along the entire length thereof, substantial variation in the kinetic energy being precluded. Figs. 11 and 12 show the application to a radial inward-flow machine in which the discs 4, 4<1> are provided with oppositely curved ribs 7 which define the channels. The ribs cross one another at an angle of 45‹. Applications to axial flow machines and modified forms of channels are described. Gas turbines. Figs. 43, 44, and 47 show the application to a gas turbine comprising an air compressor section 21, 21a, and a turbine section 25, 25a. The combined rotor 21a, 25a surrounds the stator 21, 25, and both members are provided with crossing spiral grooves as described above. A centrifugal wheel 22 mounted on one end of the rotor supplies air to the channels of the compressor section from which it passes to the centrally situated combustion chamber which, as shown in section in Fig. 47, comprises three or more oil-fed burners 23, 59, 60. From the chambers 24 the products of combustion pass through the turbine section to the exhaust 53. The oil is supplied to the burners through insulated, bead-covered pipes 73 from an atomizer 88 to which oil is fed by air pressure from a tank 90 which is refilled automatically by a pump 103 under the control of float-and-cam gear 106, 108. The air for the atomizer is forced by a pump 101, and may be drawn from the main compressor 21. The atomizer is controlled by a governor 93. The auxiliary pumps are driven from a cross shaft 94 geared to the rotor hub. Rotors. The rotor 21a is surrounded by an outer shell 42, a shell 43 having air-circulation grooves, an elastic corrugated jacket 44, and an airtight jacket 45. Cooling parts. The stator and rotor are cooled by circulating water, atmospheric air, and compressed air through suitable channels. Starting. The first ignition in the turbine may be effected by electric sparks at the burners.