GB677116A - Improvements in and relating to rotary volumetric motors - Google Patents

Abstract

677,116. Rotary engines; motor power plant. TAVERNIERS, P. Sept. 29, 1950 [Sept. 29, 1949], No. 23915/50. Classes 110(ii) and 110(iii) [Also in Group XII] An internal - combustion engine of the rotary-abutment type uses the recess 11 in the abutment 10 as a distributing means for combustion gas, or air, admitted through a port 6 and exhausted through an outlet 7. The recess still communicates with the working -chamber, by means of grooves, when out of contact with the ports 6, 7. Fuel may be injected through a port 12 to increase the temperature and pressure of the gases in the expansion space 8<SP>1</SP>. Fig. 8 shows a four-cylinder engine 1, 2 3, 4 with pistons and abutment - recesses angularly spaced relative to each other, to give a balanced drive to a power shaft 42. Clearances are provided between the periphery of a piston 9-9<SP>4</SP> and the bore of the cylinder 5<SP>1</SP>, and also between the abutment periphery and its cylinder 5<SP>2</SP>. The rotors 8, 10 are coupled mechanically. Cooling chambers within the rotors and casing may be supplied with air. A recess 46, Fig. 6, in the abutment communicates with the inlet port whilst a recess 23 communicates with the chamber 8<SP>1</SP> and later the recess 23 is connected with the second abutment chamber by way of a duct 24. The gases are thus admitted at constant pressure when the recess 11 is open to the port 6, followed by an adiabatic expansion dut to the side ducts leading from the recess to the working chamber. A combustion chamber 13, Fig. 7, may be used before the inlet 6 and comprises a fuel injector 14 and a converging nozzle 43 supplying the compressed air, a valve 28 controlling the supply of preheated compressed air from a supply 27. Cooling air from the casing gasket 5<SP>1</SP>, 5<SP>2</SP>, Fig. 8, is led to the combustion chamber supply 27. Compressed air is supplied to the interior of the hollow rotors through annular chambers 30, and leaves through outlets 49. Packings 31 are provided and surrounded by cooling water chambers. Fig. 12 shows an arrangement in which an air compressor 60 supplies hollow rotors 8, 10 through pipes 62, 65, the casing 5<SP>1</SP>, 5<SP>2</SP> through a pipe 63, and the chamber 27 direct through a pipe 66. Valves 67, 68, 69 are controlled by thermostats 81, 82, 83 which are connected to the ports 8, 5,' 10, respectively. A plant, Fig. 9, has a combustion chamber 13, rotary engine 32 according to the invention driving a propeller 33, an exhaust-driven turbine 17 and gearing 50 driving a compressor 16. In a modification a multi-stage engine exhausts into a turbine 17. A third arrangement has a multi-stage engine driving the compressor 16 which is supplied with air from a firststage compressor driven by the turbine 17. An inter-cooler is provided between the compressors. Exhaust gases from the turbine flow through a heat-exchanger to heat compressed air flowing to the combustion chamber. Specifications 631,174 and 642,145 are referred to.