GB196931A - Improvements in combustion turbines - Google Patents

Abstract

196,931. Dufour, L. April 28, 1922, [Convention date]. Multi-stage centrifugal pumps; section of turbine wheel used as compressor.-A combustion turbine has several pressure stages and wheels which serve as turbine wheels and compressor wheels; these are so arranged that they impart to the gases a portion only of the pressure necessary for the working of the turbine, the remainder being imparted by. an auxiliary centrifugal turbocompressor. The turbine is shown with five wheels b<1> - - b<5> provided with ribs or blades f which project beyond the circumference of the wheels. At the top of the machine the projecting parts of the blades pass into the chambers k<1>- - k<5> through which the gases pass from the combustion chamber n and the tube x, and in these chambers the blades act as turbine blades. The lower part of the machine, comprising more than half its circumference, forms a compressor. The gases from chambers h<1> - - - h<5> pass between fixed guide vanes q and enter the impeller; after leaving the blades f they pass through the diffusers g and chambers l<1> - - l<5> to pipes y<1> - - y<5> leading to sections of the auxiliary compressor. Twelve impeller wheels r<1> - - r<12> are mounted on the auxiliary compressor shaft a<2>, Fig. 3, surrounded by diffusers g<1> - - g<12>. The impellers r<1>. r<2> act in series and discharge through a pipe z' into the atmosphere. The remaining impellers r<3> - - r<12> act in series and the compressor part of the turbine wheel b' is included in the series between the impellers r<9> - r<10>. The compressor part of the turbine wheel b<5> acts in parallel with the impellers r<7>, r<5>, r<3> respectively. The passage of the gases cool the turbine blades. During working, air enters the pipe w', pa,sses through the compressor impellers r<3> - - r<12> and the associated turbine wheels b<4> - - b<1>, passes through the pipe w<2> to the regenerator R<1> where it is heated by the exhaust gases from the turbine, and then passes through the pipe w' to the combustion chamber n to maintain the combustion of the crude petroleum which enters the chamber through the pipe v<3>. The gases of combustion pass through the guide blades m<1> - - m<5> and chambers k<1> - k<5> operating the turbine wheels b<1> - - b<5> as they pass; the last wheel b<5> is operated at a pressure below atmospheric pressure. The hot exhaust gases are conveyed by the pipe z<1> to the regenerator R<1> to heat the incoming gas. thence by the pipe z<2> to the refrigerator R<2> where they are cooled by circulating water, and finally to the discharge pipe z<4> through the impeller r<1> and the compressor part of the turbine wheel b<5> arranged in parallel. Refrigerators may be placed between the stages or groups of stages of the auxiliary compressor and the compressor may be driven by the turbine. The number of turbine wheels placed in series and in parallel with compressor impellers may be varied. Specification 188,322 is referred to. Reference has been directed by the Comptroller to Specification 181,377.