US839243A - Turbine bucket-wheel. - Google Patents

Description

PATENTED DEC. 25, 190s.

\ "J. WILKINSON. I v TURBINE BUCKET WHEEL. IIIIIIIIIIIIIIIIIII NI- 4, 1906..

a UNITED STATES PxT-ENT OFFICE.

JAMES WILKINSON, or PROVIDENCE, RHODE ISLAND, ASSIGNOR o WILKINSON TURBINE COMPANY, A CORPORATION or ALABAMA.

7' To. (pi/Z wig/m it'may concern.- I I I Be it known that I, JAMES WILKINSON, a cit zen .of'v the; United States, residing at Iight andl JQui abIe bucket-wheel in which- TURBINE BUCKET-WHEEL.

No. 339,243; a I

Providence,in the county of Providence and State of .Rhode Island, have invented new and useful Improvements in Turbine Bucket- Wheels, of'which the following is a specification."

invention relates to an improvement in the manufacture of turbine bucket-wheels, its object being to produce at a small'fcost a tubular buckets are used and cast-jointed to the Wheelrrim inthe manner described and claimed in other pending applications. A wholev wheel or a rim portion only may be cast to the buckets, or segments of the wheel or rim may be cast-jointed to segmental rows of buckets. I

My invention also contemplates the provision of a novel form of band for the other ends of the buckets which serves to brace'and strengthen the tubular buckets against col-- lapse while leaving their outer'ends open to prevent the accumulation of water in uckets due to condensation. My invention further'comprises the details of construction and arrangement of parts hereinafter more particularly specified and claimed, reference being had to the accompanying drawings, in which',

Figure 1 is a side elevation of a portion of the wheel broken away to show thebuckets partly in section and partly in side elevation and illustrate: the manner of gripping the outer band in place. Fig.- 2 represents a partial sectional view through the rim of a' I bucket-wheel provided with my improved form of bucket.

Fig. 3 is a top plan view of the band, showingthe perforations. therein before the bucket-lips have been turned. Fig. 4 isa similar view of the band with the bucket-lips bent into engagement therewith.

Figs. 5 and 6 represent bottom and side views of the tool for turning grip the band.

Similar reference-numerals refer to similar parts throughout the drawings. As illustrated in its preferred form my invention comprises a wheel-web 1, having an integral rim 2, in which the inner ends of a ring of tubular buckets 3 'are embedded. The buckets are formed for lightness and cheap'n'ess from thin steel tubing which is over the bucket-lips to the Patented Dec. 25, 1906.

shaped to present the desired exterior'crossvided at its outer end with a pair of curved integral lips 4 and 5 and at its lnner end with any desired number of perforations, as 6, to give a positive lock to the cast-joint.

The lip 4 of each bucket constitutes a narwhile the lip. 5, which is widerv than 4, forms adapted to' pass through apertures -7 in a band 8, theapertures having'concave and spond with the curve of the ips 5 and 4. The side edges 9 of these apertures are convex through the band and bent over, as seen in Fig. 5,-the sides 9 serve to grip the li s and strengthen the buckets against 00 lapse.

curvedcharacter ofthe lips and front and rear edges of the apertures. I To turn the lips, Iu'se the tool 10, (illustrated in Figs. 6 and 7,) inserting its end 11 through the band and well into the open end of the bucket. It makes a close fit with..the bucket and band opening, as seen in Fig. 5. The shoulder 12 on the tool engages the lips and when struck spreads them over to grip the band, the end 11 holding the walls of the bucket from flexorcollapsing. This manner of handing ends, thereby preventing the accumulation of water in them while running. I

This construction provides an extremely light-weight bucket-wheel which may be chea ly constructed and which 'will provide am e strength for moderate-speed turbines.

\ 'hat I claim is 1. A turbine bucket-wheel comprising tubular buckets connected thereto, and a band which surrounds the ring of buckets and is connected to their outer ends which are left open. i

of tubular buckets connected thereto, and-a band surrounding said buckets and connected to their outer ends, said band after being connected having openings therein opposite the 0 en ends of the buckets. I

3. Atur ine bucket-wheel having a ring of tubular buckets" connected thereto, a

row extension of its concave orworkingface,

'an extension of the buckets convex face.-

These substantially similarly curved lips are] This latter effect is further increased by the sectional contour, each bucket being proconvex front and rear ed es which correthroughout the greater part of their length, as seen in Fig. 4. When the lips are inserted the buckets leaves them'open at their, outer ICO 2. A turbine bucket-wheel having a ring apertured band engaging the outer ends of to Wheel-blank, tubular buckets connected to faces, a band having curved slots therein to provided with a ring of tubular buckets, of a band surrounding said buckets and provided i curved lip at the outer end of each bucket formed by an extension of one of its curved said buckets, projections integral with the concave and convex faces of each of said buckets which project through said apertures in the band and are bent into engagement therewith. I

5. A turbine bucket-wheel comprising a l the periphery thereof, and an outer band having concavo-convex openings therein adapted to receive and grip curved lips integral with the outer ends'of said buckets. Y 1

1/6. The combination with a bucket-wheel with openings having curved and'rear edges 1 and inwardly-projecting side edges, and

curved projections on said'buckets which engage'the curved edges ofsaid openings and are bent to grip said band, substantially as described.

7. The combination with a turbine bucketwheel provided witha rin of tubular convided with equidistant apertures, each aperture having one convex and three concave edges, and projections on the buckets which pass through said apertures and are gripped to said band, substantially as described.

' 8. Ar bucket-wheel comprising tubular buckets having curved lips integral with their front and rear faces, a band having apertures 7 therein to receive said lips which are-adapted to be bent over into engagement with said band.

- In testimony whereof I'have hereunto set my hand in presence of two subscribing wit- HGSSGS.

. JAMES WILKINSON.

Witnesses:

JAMES H. NoLAN,

JOHN F. GRANDFIELD.

cavo-convex buckets, of a ucket-band pro-. "1"

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