GB1499855A - Rotary fluid-machine - Google Patents

Abstract

1499855 Rotary positive-displacement fluidmachines EMPRESA DE CONSTRUCCION INDUSTRIAL 22 Aug 1975 35036/75 Heading F1F An I.C. engine has identical lenticular main rotors 70, 70a, Figs. 23 to 25, fixed to a common output-shaft 65 and co-operating with lenticular abutment, or "valve", rotors 72a ... 72e, 86 which are driven in the same direction as the main rotors by the shaft 65 through an external geartrain (94), Figs. 21 and 26 (not shown), the rotor 70a drawing air for combustion through a port 98 and urging it through a passage 101 in a fixed partition, or "body", 99 whence it is compressed by the rotor 70 into a combustion chamber containing the rotor 86. Fuel injected into the aforementioned chamber through a nozzle 102 is ignited by a hot filament (103"), Figs. 19 and 20 (not shown), of an "ignitor" 103, axial coolant and lubricant passages 87a being provided in the rotor 86. After partial expansion while driving the rotor 70 the combustion products are transferred through a passage 100 in the body 99 to undergo further expansion while driving the rotor 70a. Air for cooling purposes is inducted through a port 107 and expelled through a port 107'. Electrically-operated valves 104 regulate the proportions of the air and combustion gases which are displaced by the rotors 72b, 72e so as to be recirculated by the respective main rotors 70, 70a. A fan 95 expels the exhaust gases through a pipe 97. The engine may have only a single main rotor co-operating with two diametrally disposed valve rotors, Figs. 42 and 43 (not shown), and in this form may be adapted to operate as a double-acting motor, Fig. 59 (not shown), or as a double-acting compressor or vacuum pump, Fig. 59a (not shown). In the said compressor or vacuum pump arcuate inlet ducts (74) are provided in the main rotor so as to produce a dynamic pumping effect in addition to the positive-displacement one. The machine may have a single main rotor co-operating with four symmetrically disposed valve rotors and be adapted to operate as a hot-gas engine, Fig. 46 (not shown). As shown in Fig. 61 the engine according to Figs. 23 to 25 may be air cooled and have an extra main rotor 71, the shaft 65 driving an airscrew 122. The rotor 71 is double acting, has an inlet opening 121 and arcuate inlet ducts 74 similar to those of the compressor or vacuum pump according to (Fig. 59a), and co-operates with a pair of valve rotors 72 to compress air, which is transferred to the rotor 70 through a pair of diametrally disposed passages 101 (only one shown). The rotor 70 further compresses the air into combustion chambers 62 and is driven by the combustion products, which are transferred through a pair of diametrally disposed passages 100a (only one shown) for additional expansion while driving the rotor 70a. The rotors 70, 70a are doubleacting. The apex edges of the rotors in each form of the machine may be helical instead of straight, Figs. 19a and 19b (not shown). The geometry of the rotor profiles are described with reference to Figs. 1 to 12 and Figs. 62 and 62a (not shown).