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2 ing“I. Onlythethrustoftheouterrimofthe blading ‘Iis balanced by the outwardly traversed labyrinthpackingll. Astheareasortheblad ings 4 to 1, so far as they are balanced by the labyrinth packing II, are approximately equal, but,forexample,maybeusedwithmachineshav 15 planesofrotatingdisks,stationarydiskscarry rotating discs arranged on said shaft, a plurality of radially traversed rows of blades on each oi! ' said discs and arranged to be impinged by a work thrusts upon said shaft in the same direction, and radially traversed labyrinth packings on the unbladed outer sides of said end disks,vthe outer diameters of such labyrinth packing being in 2,344,100 - any change in the course of the pressure drop through such blading will scarcely ail'ect the bal ance. Thepressureattheshaftglandsisfurther reduced and the arrangement simpli?ed as com paredwithFig.1.Buttheperiectnesso1’hal 10rotatingdiscsarranged-onsaidshaft,a-plurality once under all conditions is best with the ar- - oi’radiallytraversedrowsofbladesontheinner rangement 01 Fig. 1. side of the end discs and on both sides of the Obviously, my invention isnot restricted to ro central "disk and arranged to be impinged by a tary machines of the speci?c i'orm illustrated, working medium, there being more than three ing axially traversed blades or labyrinths which are staggered in radial direction. I claim: ing blades cooperating with said rotating~disks. the working medium ?owing at diii'erentaverage pressures along the two sides of at least certain of said rotating disks and moving in the same 1. In a rotary machine, such as a reaction steam or gas turbine, the combination of a shaft, 20 general axial direction and thus exerting axial _ing medium, there being more than three planes oirotatingdiscs,stationarydiscscarryingblades 25 openconnectionwiththeouterdiametersoithe cooperating with said rotating discs, the working medium ?owing at diiierent average pressures along the two sides of at least certain of said ro tating discs and moving in the same general axial direction,andthusexertingaxialthrustsupon30 4.Inarotarymachine,suchasareaction saidshaftinsuchdirection,andaradially.trav- Y steamorgasturbine,thecombinationaccording to claim 3, wherein the inner parts of said laby rinth packings are both connected with a point in the‘stream of working medium between the third and the last radial plane 01' the reaction blading seen in the direction 01 the ?ow oi the working medium. ‘_ “blading, and the immediately next connection with the stream or working medium ?owing throughthemachinebeingprovidedattheinner 40 toclaim3,whereintheinnerpartsofsaidlaby~ part of such labyrinth packing and leading to a point behind that radial plane of the reaction blading which is the second in the direction of the ?ow oi the working medium, but in advance ofthelastrowofreactionblading. 2. In a rotary machine, such as a reaction steamorgasturbine,thecombinationaccordins ersed labyrinth packing on the unbladed side 0! the ?rst impinged rotating disc, the outer diame ter of such labyrinth packing being connected with the stream of the working medium ?owing through the machine at a point in advance of the entry of the working medium into the reaction to claim 1, wherein the immediately next con nection with the stream oi’the working medium ?owing through the machine at the inner part ' of such labyrinth packing leads to a‘point be tween the third and the last radial plane of the reaction blading seen in the direction or the ?ow of the working medium. . 3. In a rotary machine, such as a reaction steam or gas turbine, the combination of a shaft, bladings on the other sides oi said disks and the innerpartsofsuchlabyrinthpackingsbeingboth connected with some point in the stream of work ing medium ?owing through the reaction blading. 5. In a rotary machine, such as a reaction steam or gas turbine, the combination according rinth packings are both connected-with a point in the stream of working'medium within the last radial plane oi’the reaction blading at a diameter whichv corresponds to the mean outer diameter oi’ 46 theotherradial?owbladinggroups. ULRICH MEININGHAUS. _PDF Image | RADIAL FLOW TURBINE 1941
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