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Patented June 16, 1936 when UNITED STATES PATENT E'E'EQE 2,044,540: RADIAL FLOW TURBINE Ragnar 010v Jacob Miiller, Finspong, Sweden Application July 26, 1935, Serial No. 33,371 ' In Sweden June 6, 1934 5Claims. (01.253-165) which extend uninterruptedly all around may be fluidturbinesofthedoublerotationtype.When providedononesideoftheturbinetopermit turbinesofthistypearearrangedasbleeding extractionofdriving?uidfromoneormore This invention relates to radial ?ow elastic turbines, the bleeding has hitherto taken place 5 throughaperturesformedintheturbinediscsas spaces formed in the blade system, a regulating element carrying sealing ?ns being provided in 5 wellasintheplatesofthelabyrinthpackings saidspaceorineachoftheminordertocon situated outside said discs. Out of regard to strength it has not been practicable, however, to form too many and too large apertures in the 10 turbine discs and this fact, in its turn, has re strictedinaveryhighdegreetheamount ofelas tic ?uid, as steam or gas, which could be bled asamaximum. Inordertoenableanincreased bleeding it has been proposed to arrange an out 15 er part or section of the blading for single rota tion by substituting for the outer part or section of one rotary turbine disc a stationary wall car ryingguideblades. Bythisarrangementitwas possible to provide between said stationary Wall 2O andtheadjacentinnerturbinediscanarbitrari ly ample space through which the elastic ?uid canbebledinanyquantitydesired. Inthis,case there may be provided a regulating element in the blade passage proper between the double rotation 25andthesinglerotationsectionsoftheblading. In a turbine of this type, however, the two oppo sitely rotating shafts or journals will deliver un equally large powers due to the fact that one turbine disc carries fewer blade rings than the 30 other turbine disc. If it is desired to cause the two shafts to deliver equally large powers which is, as a rule, the case, especially in respect of turbines the shafts of which are directly coupled trol the admission of driving ?uid to the section of the blade system surrounding the space. In the accompanying drawing, Fig. 1 is an axial section of part of a turbine according to one 10 embodimentoftheinvention. Fig.2isadetail View. Figs. 3 and 4 are axial sections of cer tain parts of modi?ed embodiments. With reference to Fig. 1, the numerals I and 2 indicate the shafts of the turbine rotating in op positedirections. Shaftlcarriesaturbinedisc 3 and shaft 2 carries a turbine disc lthe diame terpofwhichisgreaterthanthatofdisc3. The turbine disc 3 and the corresponding portion oftheturbinedisc1%carrybladerings5towhich N)0 driving ?uid is admitted in the usual way from chambers B of driving ?uid chests through aper tures 1 formed in the turbine discs. The blade rings 5 form an inner blading surrounded by an outerblading8separatedfromtheinnerblad ing 5 by a space 9 of comparatively great radial width. Theouterblading8iscarried,inpart, by the outermost portion of the turbine disc 4 and, in part, by a separate turbine disc il. Said last-mentioned disc is connected to the turbine disc 3, inasmuch as the outermost blade ring ll of the inner blading 5 which is carried by disc 3 and the innermost blade ring 52 of a blading 8 which carries disc Il are connected together to electric current producers, there must be ar 35rangedanauxiliaryturbineinconnectionwith onthesideofthepassagebetweenthebladesre 35 one shaft. . The present invention has for its object to provide a radial ?ow turbine which isof the dou ble rotation type to its whole extent and which 40 allows,nevertheless,thebleedingofanydesired quantities of driving ?uid without interfering with the strength of the turbine discs. The invention is characterized, chie?y, by the fact that one of the oppositely rotating turbine 45 discs comprises two or more separate annular sectionsconnectedtogetherbymeans ofthemov ing blade rings carried thereby, inasmuch as the outermost blade ring of an inner disc sec 50tionandtheinnermostbladeringoftheadjacent outer disc section are connected together on the side of the passage between the blades remote from the disc sections, so that while maintain mote from the disc sections 3 and it. This con nection is shown in Fig. 1 as represented by a radially extending annular wall l3'formed inte grally with the right hand supporting rings or saidtwobladerings. The space 9 between the two bladings 5 and 8 communicates by a corresponding space between the two disc sections 3 and H! with a bleeding chamber il provided in the turbine casing, said connecting space extending uninterruptedly all 5 around. LeadingfromsaidbleedingchamberI4 is a bleeding pipe l5. Outside the turbine disc sections 3 and Hi there are labyrinth packings I6, I‘l, respectively, of which the former leads tochamberIt.Outsidetheturbinediscithere50 is a labyrinth packing l8. Due to the fact that the connection between the space 8 and the bleed ing chamber M is open all around, any desired ingdoublerotationofthewholebladesystem, fractionofthedriving?uidwhichhaspassedthe 'bleedingopeningsofanydesiredradialwidth innerblading5maybedischarged.PDF Image | Moller Radial Flow Turbine
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