Patent GB-1251882-A (GB)
IPC: F02B75/02
Filed: 1969-04-15
Abstract: 1,251,882. Rotary positive-displacement machines; jet propulsion plant. D. ODAWARA. April 15, 1969 [April 22, 1968; June 28, 1968], No. 19291/69. Headings F1F and F1J. In a rotary positive-displacement machine a rotor 2, Figs.1 and 2, attached to a power-input, or output, shaft 3 has discal members 8, 8<SP>1</SP> fixed thereto and outwardly-sliding radial-vanes, or blades, 6 carrying shafts 36 with slide members 7 thereon in abutment with a casing 1, the members 8, 8<SP>1</SP> being in frictional engagement with rotors 4, 4<SP>1</SP> mounted on bearings 5 and having radial grooves 13 and slots 14 for guide-members 11 on the blades and shafts, 39 on the guide-members, respectively. Sliding members 42 on the shafts 39 are lodged in annular grooves 41 in the rotors 4, 4<SP>1</SP>. Packing rings 25 in the casing are a pressed against the rotors 4, 4<SP>1</SP> by spring-loaded pins 21, 22. Packing strips 37 are inserted in the members 7. The guide-members are of rectangular profile in cross-section and may be replaced by members having a circular profile, Figs.4 to 7 (not shown). The machine may be modified, Fig.9, such that the blades 6 are of telescopic construction to facilitate reduction in the diameter of the body of the rotor, which may contain lightening recesses 16 that can be used combustion chambers when the machine is an I.C. engine. Ribs 6b<SP>1</SP> ,  6 c <SP>1</SP> ,  6d<SP>1</SP> on blade sections 6b, 6c, 6d rigidify these sections. In another form of the machine Fig.12 (not shown), which is similar to that shown in Fig. 9, when fully retracted the radially-innermost sections of the blades abut spring-loaded members, or bases, (28) with a member, or base, (29) therebetween to prevent the said sections fouling each other, the bases (28) urging the blades radially outwards. In yet another form, Fig.13 (not shown), the rotor carries two diametrally-opposed telescopic-blades, the radial innermost sections of which are integral with each other. Packing strips (32), Fig. 14 (not shown), are lodged in the periphery of the rotor 2. In a further form, Fig. 15 (not shown), the machine is similar to the form shown in Fig. 9, saving that each of the rotors 4, 4<SP>1</SP> comprises two axially separated parts with the respective discal-member located therebetween. The rim of the member 8<SP>1</SP> may extend beyond the casing 1 to permit power input, or output, thereby through gearing (not shown). Two machines may be arranged in series, Figs. 19, 20 or 21 (not shown), to form an I.C. engine, one machine serving to compress either air or fuel-air mixture while the other is driven by expanding combustion-products. In jet-propulsion apparatus the aforesaid I.C. engine in one form or another may constitute an engine 53, Fig.16, for driving another form of the machine at 52 having convex or trapezoidal blades 6 and serving to compress air into which fuel is injected at 56 and partially burnt. A spring-loaded control-valve 57 opens to allow the compressed fuel-air mixture to flow by way of a guide screw 61 into a combustion pipe, or line, 55 wherein the unburnt mixture is ignited by exhaust gases issuing from the engine 53 through a pipe, or line, 64. The engine 53 receives air through a pipe, or line, 62 containing fuel-mixing means 63. The screw 61 renders the mixture turbulent. The apparatus may be modified to include a plurality of machines acting as compressors and a common combustion chamber (80), Figs.17 and 8 (not shown). Alternatively, the apparatus may simply comprise two machines of the form according to Fig. 13 (not shown) connected in series, Figs.22 and 23 (not shown), one machine serving to compress air while the other machine is driven by expanding combustion products. The first machine is driven by the second one.