US1469902A - Blading - Google Patents

Description

Oct. 9, 1923. 1,469,902

C. GILSON BLADING Filed Aug. 22, 1922 INVENTOR Patented Get, g, 1923.

onnisrian ertsont or rir'rsnunen, rENnsYnvANI/a, assrenon 'ro'wns'rrnenonsn EZECTBIC AND MANUFACTURING COMPANY, s'conroaa'rronon'rnnnsytvnnref f ,npplieation me August 22', 1922; se iai ndgasasea Y 7' To aZLw/iom it may concern:

ing a row of guide blades 14 and a'row of Be itvknown, that I, CHRISTIAN GILsoN,

a citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny 'an dfitateof Pennsylvania, have invented a new andnscful Improvement inBlading, of which the 'followin is a specification;

My invention. re ates to turbine blading, more particularly to blading which isrelatively wide compared to its height, andit has for its, objectuto provide apparatus of the character designated which shall have partition or deflector members secured be-' tweenthe blades for the purpose of deflecting and changing the direction of flow of the motive fluid and of bracing the blading as-- 7 I I p I l V and ail-outer partition member 22. .Each of sembly.

Apparatus embodying featuresof vention is illustrated in the'acc'ompanying drawings, forming apart of this applica-,

tion, in which: Fig. 1 is a longitudinal sectional view of a turbme having bladmg with my improved deflecting and bracing structure applied thereto; Fig 2' is a perspective view'showing a plurality of blades with my deflector and bracing structure applied thereto; Fig. 3 y is a fragmentary sectionalview taken along the. line IH III of Figml-{and Figs4 and 5 are detail views.

of one of the deflectors and bracing elements.

In my application, Serial No. 554,988, filed April 18, 1922, and assigned to the Westinghouse Electric and Manufacturing Company, I show exhaust blading of the wide type, adapted-to receive steam flowing in an axial direction and to discharge it peripherally, in which the blades are made in sections in order to facilitate manufacture. My'present invention relates to deflector and bracing structure which is especially adapted for use in connection with scctionalized blading of this type.

Referring now to the drawings fora more detailed description of my invention, I show a turbine comprising a rotor 10, supported by the bearings 11 of the cylinder creasing 12, the rotor 10 and the cylinder or casing 12 carrying suitable energy-abstracting elements followed by a last stage at 13, includwide blades 15 adapted to receive axially flowing steam and to discharge the latter radially or peripherally.

The wide blades .15 include inner approxi- .to facilitate manufacture, as

, the blade sections.

the latter portions serving to eXpa-ndfand to discharge steam at small anglesperipherally. The blades 15; are preferably com posed of a plurality of sections 18in order application aforesaid;

with 'wide blades of the type referredto,

set forth in my P means to assist in changing the directionof flow of steam from an axial to "a radial direction as well as to brace the blade struc} A ture. Accordingly, I; have devised deflector and bracing members 20,- each of which comprises a lower curved deflecting portion 21 are bordered at the sides by flangcs 23 "adapted to contact with the plane portions- 16 at the rear of the sections 18, and the deflecting and bracing members are secured "to the blade sections in any suitable manner,

as by the rivets 24:01:. by spot-welding.

The deflecting andbracing members 20 V are connected to the blade sections 18 in the following manner: After the first annulus.

of sections 18, adjacent to the guide blades -14, is assembled with respect to the rotor, 1 i

the corresponding deflector and bracing members 20 are placed between the sectionsv at the rear sides thereof with the outer ends of the deflector and bracing membersad- 'jacent to thecurved or spoon-outline por-.

tions 17, and then the rivetsQaareinserted,

in the openings provided, therefor in the" blade sections and in the flanges-23'sothat 1 each rivet holds a blade section between the flanges of adjacent deflector and bracing members, or the flanges are shot-welded to and bracing members are assembled in-the seen that the deflector and bracing members longer from theinlet side of the wide blades The succeeding annuli of blade sectlons and corresponding deflector .20 for the blade sections18 are successively .15; in order that the curved portions 21; thereof may successivelyidivide. the annulus 75} and to changethe direction of fiowofeach of steam flowing in an axial direction between the blades into a pluralityj of portions of the latter portions toward a radial directlon. I I I :The partltionnnd bracing portions22 of the deflector and bracing members 20 cos, ;o'pefra te with tl e blade sections to define radiaIchannels QS through Whiehsteem is guidedfor action upon the outer curved.

or spoon-outline portions-l7; and, as the .-arefirml braced a ainst' i' ibration.

members Q-Qareplaced between and secured to tl'lGlESPQCtlVG blade sections, the latter in the art that it is not'so limited, but is sus cept bleof various other changes and modifications, Without de'partinp; from thespirit 1 receivestearn While I have shows invention inbiitr oneforni, 1t Wlll be obv ous to those skilled reetionof flow olfsteanr from axial toward aradial direction. V

7; in a turbine,'a row-ofsectionalized, tipdischarging blades and deflectors forsuccessively deflecting portions:ioithe steain. to-. 75

ard the tips and maintaining the portions separate, 7 v a S; In a turbine, a row of blades adapted toreceive axially flowing steam an'd "to charge it peripherally, each of said blades. '3 i conipiasrngplurality ofradialisections, and

radially' rranged partition members of dif- .ferent lengths respectively secured'yto cor responding sections of th'ebladesfan'dhaving curved ste'am deflector portions at their lower ends to change t'heldirection of new from an axial toward a rad al direct on. r '9. In a turbine, a row of blades and'a pluaxially and to ,discharge'it V peripherally, each or" said blades being "made in sections, and members of different lengths n secured the rear sides or"- corresponding; sections. and having attheir,lower ends curved deflectormembers to change the (li- 74) rality of deflector members of difierentf lengths secured to the bla'des and having 1n-- 99 ner curved deflector portions and straig'ht thcreoi and I desire. therefore, thatonly such limitations shall be placed thereupon as ZIIO'JIDPOSQCl by the prior art or as are.

What I clai'nris: v 7 lgln'a turbine, a row oi blades,each' of 3 specifically set forth in the appended elaims.

' whichfcornprises a plurality of sections, and

bracing-means secured along the rear edges of the sections. p V

2.111 a turbine, a roWof blades',,each of Whichcomprises a pluralityof radial sechens, and radially-arranged bracing means secured ftothe rear edgeses thesect'ionsl 3; In a turb ne, a row of blades, each of which comprises a plurality of radial. sec tion's, radially-arranged bracing means s'ev cured to the rear edges or" thesections, and deflector means carried by theinnerends of" the bracing means 4. In a turbine, arow of bladesadap'ted to receive steam flowing in an axial direction and'to discharge it peripherally and having'outer curved, e1 iergy-abstracting portions, radially arrangedbracing means se cured between the blades, and deflectors car-e ricd by the bracing means and arranged successively lower from the inlet sides *ofthe blades in order to successively divide the steam into a plurality of portions and tow change the direction. of flowof' each portion from'an axial towarda'radial direction.

5. In a turbine, a row of blades adapted to:

a .1 1 H v V recelve steam axially and to discharge it peripherally, each of said] blades being composedof a plurality of sections placed side" by s de, and deflecting and br'aclng members secured to like, sections of adj acent'bl'ades to brace the se'ctionls and'tofgnide and'defiect steam toward'the blade tips;

subscribed 1922; a

areal-nine, a row ofblades'adaptedto "portions extending toward 'the'blade' tips,

10. In a turbine,a row ofblades adapted to receive, steam axially and todiseharge 1tperipherally, means for successiyely divid- 9 ing' the in-flowing annulus of steam intov a" {plurality of ann'uli, means forchanging the direction of flow of eachol thelat ter froni an axial toward a radialfdirection', and sup-e porting-means secured to 1 the last-named 100 7 means, extending in a radialdirec'fion, and seeured tothe blades for bracing the latter and serving as" Quides'to insure the flower, 7

steam i n'a radial direction.

7 11. In a turbine, a row of blades adapted to receive steam axially and to discharge 'ito peripherally, a plurality ofradialpartitions secured toand between ad acent blades, and steam deflectors carried by the partition 12, In aturbine, ajrow ofblades adaptedto U0 receive steamer one sidefa'nd'to discharge peripherally, and having outer" curved en ergyabstracting portions, spaced partition members of (lifi erentlengths secured 'to and 1 between the blades to brace the latter andf to I constitute a plurality of radial passagfes be tween adjacentblades in -ra s ng infllength from the inlet to the rear sides of the blades,

and means carried by the inner ends of part tions" for deflectingportions of the steam andlior changing 'tlii'ection" 0f fio'jw thereof rection. i

In testimony oiiai'srianenisoi ff from an axial toward 1a radial "diwheel; ,hayefhereuhtd' a me this l5tl1day ofAugust', V V

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