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Publication numberUS1378464 A
Publication typeGrant
Publication dateMay 17, 1921
Filing dateOct 29, 1920
Priority dateOct 29, 1920
Publication numberUS 1378464 A, US 1378464A, US-A-1378464, US1378464 A, US1378464A
InventorsJunggren Oscar
Original AssigneeGen Electric
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Elastic-fluid turbine
US 1378464 A
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Description  (OCR text may contain errors)



:.Pvucmmu min 001.23* 1920.

l,378,464. Patented May 17, 192L Inventor". OscarJungcgVe-an l-liSAttomeg. y




To all wiz-om. t may concern.:

Be it known that I. @SCAR JUNGGREN, a citizen of the United States, residing at Schenectady, county of Schenectady, State of New York, have inventedcertain nenv and useful Improvements in Elastic-Fluid Turbines, of which the following is a speci'- cation.

The present invention relates to elastic fluid turbines and particularly to rotor structures which comprise a ring o'f buckets fastened to a disk or drum at their inner ends and having their outer ends connected together by a sectional bucket cover. In

such structures each bucket cover section their natural period or due to inequalities,

of elastic iuid pressure'. Such vibrations may cause failure of buckets and the object of vmy present invention is. to provide an improved structure and arrangement for preventing their occurrence. Y

For a consideration of what I believe to be novel and my invention, attention is directed to the accompanying description andthe claims appended thereto.V Y Y In the drawing, Figure 1 is a side elevation partly in section of a part of a tur' bine rotor embodying my invention; Fig. 2

is a top plan view of several adjacent buckets; Fig. 3 is a perspective view of a tie plate; and Figs. 4, 5 and 6 are views similar to Figs. 1, 2 and 3 of another form of the invention.

Referring -to the drawing, 5 indicates a rot-or and 6 a ring of buckets fastened thereto at their bases and having their outer ends connected to ether by bucket cover sections 7, the uckets being provided with integral tenons 8 by means of which the bucket cover sections are fastened in posi tion. This divides the ring of buckets into groups, the buckets of each group having Specification of Letters Patent.

Patented May 17, 1921.

their outer ends fastened together by a bucket cover section. 1how, according' to my invention, I tie adjacent bucket groups together bv lmeans of flexible connections or tie plates such connectlons being located beneath the bucket cover 'so as not to be in a position Where they might fret worn oli.' or Where they will impair the clearances. In the arrangement shoivn in Figs. l, 2 and 3 the flexible connections are in the form of at plates 9 reversely bent to form a U-shaped part 10. In the plates are openings 11 through which the tenons on adjacent buckets pass. The flexible connections are thus riveted in place directly beneath the bucket,F cover sections by the same tenons which hold the bucket cover sections. ThisA arrangement is well adapted for use Where the outer ends of the buckets are comparatively close 'together'.

XVir-hen the outer ends of the buckets are some distance apart. I may use either the arrangement shown in Figs. 1, 2 and 3 or` I may use that shown in Figs. il, 5 and 6 wherein the flexible connections 12 are riveted directly. to the adjacent ends of the bucket cover sections by rivets as indicated at 13. 'In this case the flexible connection as shown in Fig. 6 has' its ends shaped' to conform to the contour of the adjacent bucket surfaces.

With either of the arrangements shown,

the connections While being flexible enough to lpermit of expansion and contraction` are sufficiently stiff to tie the' bucket groups togetherso as to prevent their vibration.

By arranging the yieldable connections directly beneath the bucket cover,- the periphery of the bucket ring may have the desired clearance with the turbine shell, the connections in n0 Way interfering as they would were they on the outside. Furthermore, there is no danger of the connections lubbing, thereby getting worn or coming oose. v

In accordance with the provisions of the patent statutes, I have described the principle of operation of my invention, together with the apparatus which I now consider to represent the best embodiment thereof, but I desire to have it understood that the apparatus shown is only illustrative and that the invention may be carried out by other means.

What I claim as new and desire te secure by Letters Patent of the nited States? is 1. In an elastic nid turbine, the combination with a ring of buckets, and a setional cover tying them together into groups, of means forming Hexible eonnecticns between adjacent groups, said means being located directly beneath the adjacent ends of bucketcover sections.

2. An elastic i'luid turbine having a. rotor with ak ring of buckets thereon termed inte groops by a sectional bucket cover characterized by the factl that the bucket groups thus formed are tied together by connections in the forni of plates located directif; beneath the adjacent ends o bucket cefer aangeeft sections and reversely bent to render them iexibie. Y

3. in elastic Huid turbine having a rotor with a ring of buckets thereon formed into groups by a, sectional bucket cover fastened inte place by tenons on the ends of the buckets, characterized by the fact that the bucket groups thus formed are tied together by flexible strips 'located beneath the adjacent ends of bucket cover sections and fastened by the tenons of the adjacent buciiets.

in Witness whereof, have hereunto set my hand tins 28th day of October, 1920.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2606741 *Jul 28, 1949Aug 12, 1952Gen ElectricGas turbine nozzle and bucket shroud structure
US2610823 *Feb 11, 1947Sep 16, 1952Gen ElectricTurbine bucket damping arrangement
US2661147 *Jan 19, 1949Dec 1, 1953Ingersoll Rand CoBlower blade fastening device
US2695767 *Mar 23, 1951Nov 30, 1954Elliott CoTurbocharger
US2873087 *Jul 16, 1953Feb 10, 1959Parsons & Marine Eng TurbineMeans for cooling gas turbines
US3048365 *Dec 22, 1959Aug 7, 1962Curtiss Wright CorpRotor blade shroud and vibration damping structure
US3056582 *Aug 26, 1960Oct 2, 1962Gen ElectricTurbine stator construction
US4386887 *Jun 30, 1980Jun 7, 1983Southern California Edison CompanyContinuous harmonic shrouding
US4734010 *May 8, 1986Mar 29, 1988Bbc Brown, Boveri & Company, LimitedDamping element for independent turbomachine blades
US4936749 *Dec 21, 1988Jun 26, 1990General Electric CompanyBlade-to-blade vibration damper
US4986737 *Dec 29, 1988Jan 22, 1991General Electric CompanyDamped gas turbine engine airfoil row
US5011374 *Nov 17, 1989Apr 30, 1991General Electric CompanyMethod and apparatus for balancing turbine rotors
USRE32737 *Oct 18, 1984Aug 23, 1988Southern California EdisonContinuous harmonic shrouding
U.S. Classification416/190
International ClassificationF01D5/22, F01D5/12
Cooperative ClassificationF01D5/225
European ClassificationF01D5/22B