US1591099A - Guide-wheel blading for rotary engines, particularly for steam turbines - Google Patents

Description

. H. QUIBY July 6 GUIDE WHEEL BLADINGFOR ROTARY ENGINES, PARTICULARLY FOR STEAM-TURBINES Filed July 1, 1925 2 Sheets-Sheet 1.

July 6, 1926.

H. QUIBY GUIDE WHEEL BLADING FOR ROTARY ENGINES, PARTICULARLY FOR STEAM TURBINES Filed July 1 1925 2 Sheets-Sheet z July 6, 192

,25 trim 1, r5: XQQQQEQE MA SCHINENFABBIK V I 1, 40,923 and iqswit zer ljaliaj Th ih'vf fi fi maidsio i wh we V ing fgr 'rotaryen'ghies' erid in particular fer that-3S5 ta say, in: the fo m of. womyt oey 10 Which ha-s'the ax 'ifs' cf thetuihine-asen exist fw e i l A l, s r iw ls fle fi e kof the jet cf'steelm' pirticulaily 'inthe Vicinity of thibtitlt's oi: the giiidephahnds shbuldi yen and ii'y'equently;hseclifcflhiof guide "apparatus has ajf p'ufely eyll'ndficzil intigu ide, passages with; eppfently straight line guiding walls att, the cutlet end. This foixhof giiide; chann l ispiarticula rly uh; 7 suitable fef smell diameters becaiiseljri' the mbst favdllfablje case the lii dj es .tloiig 25 a mmgnm; Theile'stilt of this is that the mitefwzfll of the (manner impe -flee celitripefaYecCehrdtic the airticles' of steafiil. l

V which results'inoutwarcl cofiifii' 'e's'siclhed'ches radial dife'ctiolil f 3 -e A Infincthei' type" of CQIiStill-tjfiQig which is nibreccni enient feifl the pu rp'qse than i one] abbvePimentioiiedj the 'cl 'o'ss sectipln al rare'is cf the cutlets; o'f theL-g'uide ,channels I which are ofrectehgifla r form, a'i 'c' s6 twist-g ed relatiyely to each other in the' cc lir'ectio n of 'ret'atibn bf the 'fotdiwvheeh' that the ets 7N ESCHER'WYSS & 01E.

1elyto he shift of the turbine, it' ist slizflxfiliiTo AKTIEIIVGESELLSG :FT b1 33 i 0F ZURIC SWITZERLAND.

Q v f l,591, 0

,"rAl-mcem sz i i yiofi mes T h J mie's-w fii el lelkh P B IQid' ZW t e ymp n zthf l im mes; f." kwh'idl s p're i esee h' l ne-p hs 6 -*fl0'v.v-;. s eh' a @onstru m fi Lt 'g iid fjwhe 'b adiing'i the whele cf the steem j etsfitwtl lich'stri ke the 500T gle shell I, y ib idi et ipfi t gen t 7' Thepartsfof: the blades which div-id the space between t'he two 'sm 'gle 'shell hyper- 1L ring wh ijchibdh l ldsftheigliide channels "radij li -51 1 se ienw n pon ng E 'F g'; ,5; n

h q hi wid Wheel, wi h? a "en o i Fig.j'10 shows a corresponding section through'a portion of a guidewheel, in which the outlet takes place on the left hand side of the parallel circle containing x w.

axis.

I 1 Figs. 11' and 1'2"show portions of axial cross-sections through two guide wheels in which the outlet'ni'ouths of thechan'nels are inclined to the guide wheel axis 3 y (shown in Fig. 11 only). M

Figs. 13, '14 and showin two aXialqcross-sections portions of. a blading in whicheach guide channel has, in conjunction with" an outlet portion bounded by single. shell. hyperboloids with [asymptotic cone an inlet portion bounded inwards and outwarclsj(regarded. in a rad al direction) single shell hyperboloids. i

' cone in the-manner shown in Fig. '2, with the the guide channels.

by surfaces which are not constructed as In Fi 1 are shown two different kinds d e o" i r "t oi ui e appa a usesc 311C o o a s ear turbine. The' guide apparatus this fixed to the casing 32 of the turbine andv bounds the steam adnnssion charnber 33. Thesec- 0nd guide apparatus 311s disposedbetween the first rotor-wheel" and the second rotor wheel The guide bladings of the apparatus 31 are designed in the manner described later on with reference to Fig. 5,

while the guide bladings of the. guide wheel 31 are designed in the manner described later onwith'referencetojFig. 15.

Figs; 1 to lshow a portion of a guide wheel having blades ,Zwhich serve to bound the guide channels laterally. These channels are bounded inwardly (regarded in a radial direction)" by a surface 1. v The sur-.

face 1 and theblades 2 are inithisgcase, out outof a sohd'rrng 3.1;.Accord1ng to the 1n-- vention the inner boundary surface 1 s 0011-,

structedasa-single shell hypcrboloid with asymptotic V cone, the generatrices of which cone flow.

oft-he hyperboloid in question form,

parallel circlef'which passes "through? the apex of the shell, an angle which is equal tov the angle ofoutlet .of the steam from meant the systemof circles which yield planes at right angles to the axis ofrotation .ofthe single shell hyperboloid.) The sur face which bounds the guide channelradh ally outwards (surface not shown in Figs.

1 to4) is likewise constructed as a single shell 'hyperboloid. The generatrices of this hype'rboloid arelikewise prescribed straight the l ype l iids The" ade '2, .1911, test plan and in.

are prescribedwstrai htline. paths of The gcneratrices of the asymptotic (By parallel circles is tain generatrices of the aforesaid single shell hy'perboloids are of'rectilinear shape and form a whole with the" ring 3. They aiecut from a solid ring by imparting to the cutting tool relatively to the" blank a straight line'inoveinent corresponding to the prescribed straight line path of flow.

The bounding of the outer' sides of the guide channels (regarded in a radial direction) may be convenientlyeffected by an.

enclosing ring, the internal surface of which,-

as already stated, isconstructed in the form of a single shell hyperboloid. Such enclosing rings 4 are: shown in Figs. 5 and 6,

where 5 denotes the surface constructedes a single shell hyperboloid; Instead of constructing the blades 2 in one therewithin the nanner depicted in Fig. 5. The nsideand outside bounding of the guide channels in radial direction inay also be' eli'ectcd by intermediate distance ipieces 6,7 as shown in Figs. 7 and 8. In this case the blades 8, which bound the guide channels 9 laterally are held fast between the distance pieces 6,7. The outer peripheral I surface 10 of the: distance pieces 6 and the inner peripheral surface 11 of the distance .pieces are constructed as single shell hyperbololds with asymptotic co-ne. Such dis tance pieces 6, 7 may be conveniently cut out" of solid rings, after their inner and outer surfaces have been turned in .the form 7 piece withthe inner ring 3, as shown in Figs. 1 and 6, they may be cut out-of the enclosing ring so that they are integral Hit) of single shell hyperboloids. The fixing of the distancepieces tl, 7 in a guide wheel disc' and in an enclosing ring, Which inay necessary surround this latter gand the retention in place of the bladesn'iay also be efl ected in a different mannerg-from that 7 shown in Figs. '7 and 8 and described with a reference to these figures. Thus, for enauiple; the'distance pieces '7 may be connected by welding-to the blades 8 and in 1.

such case the provision of an enclosing ring l is unnecessary.

sectionallarea ofthe guide channel outlets may lie in any parallelcircleof thesingle shell :hype rboloids, so that the outlet of the Theoutlet mouth, that tosay, the

steam from the guidechannels withrespe-ct to a parallel circle which contains the ac -m axis of thehyperboloids can therefore take place to the right or left ofqthis parallel circle or in the circle itself. In the. guide denotes "the ringwhichbounds the guide channels on the inside and 4c the enclosing ring,- the cross sectional areas 12'of the apparatus shown in Fig. 9, where 3 fagain channel-outlets (only oneof whichis visible) lie in a section of a circle which lies to'the rightl ofthe parallel circle withthe .1 radius 1& wlierea's iin the guideapparatus. wift-1.6 31%- 0 the; se t n ot ieig lsin-[z in difi'erent planes, so ithat then the outlet cross-sectional area 21 of each guide channel which the cross sectional area 12 of the outlets lie, lies on the left of theparallel circle; p

v offlow and the blades between the single with the radius 16. a p 1 As shownin Figs. 11 and 12 the outlet parallel circles 19, 20 for the inner and outer single shell hyperboloids 17 and 18 may lie is made to lieobli'quely to the axis'yy of the turbine. ,In the constructional form shown in Fig. 11 oblique admissioninwards takes place and in the constructional form shown in Fig. 12 oblique admission; outwards. V

I In conjunction with a portion of 'a guide channel bounded inwards and outwards by j ticularly for steam turbines, having an ansingle shell hyperboloids a portion may also be provided on the inlet side; of such a.

channel which is not bounded by surfaces whichfiare constructed as single shell hyper.-

' boloids but as cylindrical surfaces, for ex- .shown in'Fig. 13, a curved ample. Figs. 13 to 15. where22, 23 are single, shell the guide channels] have in these cases, as portion 25 and a straight portion 26. v

I claim: t p

1. Guide blading for rotary engines particularly for steam turbines, comprising a body havingfan annular space bounded radially by innerand outer walls, and blades subdividing the space into channels, said walls atleast in the vicinity of the outlets of the channels having the shape ofsingle shell hyperboloids having an asymptotic cone and the generatrices of the surfaces of said walls are prescribed straight line paths of flow.

2. Guide blading for rotary enginespar- V ticularly for steam turbines, comprisinga body having an annular space bounded radially by inner and outer walls, and blades subdividing the space into channels, said walls at least in the vicinity of the outlets of the channels having the shape of single shell hyperboloids having an asymptotic I Such guide channels are shown in boloid.

cone and the generatrices of the surfaces of said walls are prescribedstraight line paths shell hyperboloid' walls being rectilinear.

I 3.-Guide blading for rotary engines, particularly for steam turbines, comprising a solid ring [the outen peripheral surface of lwhich is a single shell h'yperboloid with asymptotic cone and the generatrices of nular space bounded radially by inner and outer walls, and blades subdividing the space into; channels,*said walls at least at the discharge ends of said channels having the shape .of'single shell hyperboloids with asymptotic cone, and the generatrices of which are'prescribed stra-ight line paths, of

flow, and said blades being rectilinear between the hyperboloids and the outlets of the channels formed by said blades being at i any section of a parallel circ leof the hyper- 5. Guide wheel for rotary engines, particularly steam 'turbines,"comprising a discshaped 7 body having an 1 annular rate channels, said walls, at least at the discharge ends of said channels, having the so if g pa bounded radially by inner and'o-ute'r-walls Kand blades dividing said space into sepa'-' shape of single shell hyperboloids with as- V ymptotic cone. and whose generatrices "are prescribed straight line paths of flow, the

bladesbeing rectilinear between the hyperboloid walls, said walls 'terminatingat the discharge end of the channels lying in parallel circles in different, planes so't hat the vOutlet mouths of the channels Will lie obliquely to the axis of the disc-shaped body. J i ,t 1 In testimony whereof, I have signed my name to this specification.

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