US823909A - Elastic-fluid-turbine nozzle. - Google Patents

Description

. UNITED LSTATES PATENT OFFICE.v JAMES WILKlNSON, OF PROVIDENO,RHODE ISLAND,K ASSIGNOR TO WILKINSON TURBINE COMPANY, A CORPORATION OF ALABAMA.

ELAsTlo-Faul'D-TURBINE NorzLl-:g- I

Speccat-ion of Letters 'Patent Patented June 19, 1 906.

pplicaticn l'ed May 22. 1906. Serial No. 261,675.

.'Lo alt .wl/1,0m it may concern.:

Beit known that I, JAMns WILKINSON, a

citizen of the United States, residing at Providence, 1n the county of Providence and State of RhodeIsland, have invented new and useful Improvements in Elastic-Fluid-Turbine Nozzles of which thefollowing is a specification.

Myinve'ntion relates to improvements in the construction of supply-heads and dia- .hl-agm partitions for elastic-fluid turbines, avmg for its object to improve themanner of constructing motor-fluid passages which.

' are subdivided by director plates or guides.-

More particularly, it is an object of my present invention to simplify the mannerof inserting these director-plates in the passage .for the motor fluid; and it co'nsists in providing the plates with flaring sides which enter channelsv ormed'in the sideof' the nozzle- A passage andwith an enlarged head having a transverse opening therein for the reception 'of a pin or screw-bolt inserted radiallyinto the element in which'the nozzle-passage is formed. This element, which ma be a sup- 'ply-head or diaphragm, is'preferably first formed with an unobstructed opening or passage for the motor fluid, after which the channels for the reception of the sides of the director-platesare'cut or milled into the sides of they passage from 'thedischarge end. ",'Ihe holesfor .the screw-bolts are then drilled ra` dially through the head or diaphragm and. provided with screw-threads 'at their inner' 35 ends. I The rperiphery of the head or diaphragm is preferably countersunkto receive the heads ofl the screws, the openings for which are so disposed that when the directorplates have been inserted int'o the nozzle-pas- 4o sage from the under side and their flaring sides engage withinthe side channels in the passage the openings in the heads of 'the plates will be in alinementwith the screw- ,tor-plates will be locked in position. The

openings.. The screW-bolts-c'an then. be readily inserted and screwed heme, when the direcadvantages oiA this construction consist in the chea ness ofmanufacture and the' ease with whic the parts may be assembled and replaced, for it is only necessary to remove the screw-bolts and tap the upper-end of they plates .to-detach them..- a

My invention urtherconsists in the details of construction and arrangement ofparts hereinafter more particularly described and claimed, reference being had to the accompanying drawings, which form apart of this application, and in Whichigure 1 is a top planview broken away.

corresponding to Fig. 2, of a motor-fluid pas-v .sage With the director-plates removed. Fig. 6 is a sectional view taken on the line z e, Fig. Figs.- 7 and 8 represent detail plan and side views of a director-plate..l Fig 9 is 'a modified form of ya director plate or uide having a sharp admission edge dispose at an angle to its head and'mainbody portion.

Similar reference-numerals refer to similar parts throughout the drawings.

In illustrating my invention'I have shown it inconnection with a diaphragm of a multi' stageaXialflow impact-turbine. Itv will be understood, however, that my invention is l' applicable to any type of turbine or other motor having a passage for the motor fluid requiring division-plates, and it Will be undery stood that the invention -isclaimed Without limitation to the turbine'construction shown'. EThe diaphragm 1 is provided `with a central shaft-opening 2, through which the turbineshaft-,f3 passes, having suitably connected thereto 'bucket-wheels 4, provided with peripheral rows of concave-convex buckets 5. The diaphragm is'provided with a flanged periphery 6, theffla'nges-of the diaphragm being adapted to interlock'and form the casing of the turbine. Adjacent to the periphery'of the d i'aphragm and leading at an angle therethrough is a motor-fluid passage, Which, as illustrated,

- is of arcuate shape andof greater length than width. This passageis formed with a Haring inlet end 7 and a discharge end 8, which latter end leads diagonally through the diaphragm and is adapted to delivermotor iluid to the buckets 5 in the' succeeding stage compartment. From the discharge end inwardly- I form inany suitable manner a pair of oppositely-dispo/sed grooves or channels 9, which diminish in de th from the discharge end. of

' the nozzle. '.T ese channels terminate Hush with the `side walls of the motor-Huid passage at a point nearthe centerthereof and are preferably arranged in relative parallelism to my purpose to force each bucket into the lchannels 9 until it is held firmly and rigidly therein. IWhen this vlarged heads 12 of the l'ings 14 preferably ea is the case, the endirector-plates, which have transverse holes 13 therethrough, will be disposed near the fluid passage' or substantially at the beginning of the discharge portion 8 thereof, in which position the o enings` 13 will be in alinement 'with the ra ial openings 14, formed in the diaphragm eri hery 6. Theseopenfrom the countersunk recess 15 in the eriphery-of-the diaphragm and are-adaptedp to receive screw-bolts 16,

which pass transversely through the diaphragm and head 12 of the director-plates andengage screw-threads at the innersend of the opening 14. These bolts serve to hold the director-'plates firmlyin place against longitudinal movement, While the other ends of the plates arey held firmly in place against any lateral movement by the channeled portions ofthe passage. f

In Fig. 9 I have illustrated a form of guide or director plate 17, having a sharp admission edge 18 disposed at an acute angle to the l main body portion ofthe plate. This modified design of `guide is more particularly adapted for use Where the motor fluid is discharged with velocity from the buckets in Siol the` preceding stage compartment. The bolt-opening 13 Will be formed in the head, as 12, of this plate.

4 Any desired number of director-plates may be used in the4 motor-fluid passages, Which .latter may be formed wholly or partly in the diaphragm or supply-head. Though I have throughout referred to the directorplates as having tapering sides and thegrooves 9 as being of increasing depth, it Will be obvious that the director-plates may be shoul- 'v dered and machined, so as to fit closely withl'-in the grooves, which will then be of uniform depth, but relatively shorter. The tapering construction is, however, preferable, since the plates may then be driven into secure them rigidly inA place. Without therefore limiting myself to the detailsv ofconstruction as shown and decenter of the motorscribed, what I desire to claim as new, and desire to protect by Letters Patent, is

- 1. In a turbine, a motor-Huid passage, oppositely-disposed tapering recesses in the side Walls of said passage, and one or more tapering director-plates adapted to engage in said tapering recesses of said passage, substantially as described.

2. In a turbine having a motor-fluid passage, grooves formed in the sides of said passage Which increase in depth toward the discharge end thereof, a tapering director-plate adapted to enter op `@site grooves, and means to engage said p ate to lock it in position against longitudinal movement in said grooves.

3. In an elastic-fluid turbine, a stationary elementor elements provided with' a nozzlepassage, oppositely-disposed grooves formed in the side 'Walls of said nozzle and increasing in depth toward the discharge end thereof, in combination with director-pilates which taper in Width and are adapted to be inserted from the' discharge end of said nozzle into the grooves therein, said plates being provided with transverse openings, and locking-pins which project thrgugh a side wall of the nozzle to engage within said opening in each director-plate. 2 Y

4. In an elastic-fluid turbine, a supplyhead for a Wheel-compartment, a nozzle leading therethrough, one or more director- )lates in said nozzle Which have rounded en s disposed near the sup ly end of said nozzle, one or more transverse ocking-pins which engage said ends of the plate or plates, and grooves in the side walls of said nozzle to receive and hold said plate or plates, substantially as described. y y 5. In an elastic-fluid turbine, a supplyhead for a wheel-compartment having a nozzle-passage, a recess in the periphery of said head opposite said nozzle-passage, director- )lates disposed in said nozzle-passage and liaving their lower ends in engagement with the side walls thereof, transverse openings in the upper ends of said `ilates, and screw-bolts `adapted to be inserte radially into the head and to pass through the openings in said platesA to lock them in position, said bolts having their heads disposed in the peripheral recess of the supply-head.

yIn testimony whereof I have hereunto set 4my hand in presence of two subscribing witnesses.

JAMES WILKINSON.

Witnesses:

ALBAN P. REYNOLDS,

J. J. DEVENISH.

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