US1217282A - Turbine. - Google Patents

Description

c. w. DAKE &1. E. KILKEH.

TURBINE.

APPLICATION FILED JULY 24, 1914.

1,217,282. I Patented Feb. 27,1917.

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- UNITED STATES.

PATENT OFFICE.

CHARLES W. DAKE AND JOHN E. KILKER, OF CHICAGO, ILLINOIS, ASSIG-NORS T0 IYLE- NATIONAL ELECTRIC HEADLIGHT TION OF NEW JERSEY.

To all whom it may concem:

Be it known that we, CHARLES W. DAKE and J OHN E. KILKER, citizens of the United States, residing at Chicago, in the county of 5' Cook .and State of Illinois, have invented certain new and useful Improvements in v Turbines, of whichthe following is a specifieation. j

This case is a divisional applicationof No. 782,960, John E. Kilker and Charles W.

Dake, bucket wheel and process of manufac-' turing same, filed August 4, 1913.

Our invention relates to turbines and the buckets therefor having reference to the manner in which they are secured in position.

Figure 1 is a fragmentary side, elevation with parts in section and parts removed of a rotor with buckets attached.

Fig. 2 is a section on line 2 of Fig. 1. Fig. 3 is a section on line 3 of Fig. 1.

Fig. 4 is a. section on line 45* of Fig. 1.. Fig. 5 is a perspective of.one of the buckets.

Like parts are indicated by like letters throughout all the figures.

- A is a bucket wheel, body or spider or disk of the usual type mounted upon a shaft running in bearings not shown. This plate is flanged as at A Figs. 3 and 4, in the usual manner and has a rim A to which the separate buckets are to be attached. This rim is provided as ShOWn in Figs. 3 and 4, with 1 two circular slots, A and A inwardly converging each toward the other, thus leaving a. mitered extension orrib A projecting outwardly from the rim A and bounded on either sideby' the slots A and A.

1 Recesses B are located on either side of the rib A and form widened or increased areas of the slots A and A*. It will be noted from Fig. 3 that the walls B B of said recesses are parallel.

The turbine buckets C are mounted on the rib A and consist of a bottom 0, which is provided with two downwardly extending ears or lugs C C which project into the slots A 4 and grip the rib A The bottom C of each bucket has upwardly projecting therefrom a bucket wall" C, which is perpendicular thereto, and this curved bucket wall forms the vane or bucket upon which the steam is designed to impinge. A

I flat top C projects outwardly from the Specification of Letters l atent.

TURBINE.

Patented Feb. 27, 1917. (1 this application filed July 24,

curved bucket Wall, O being parallel with the bottom 0 and is substantially the same size and shape, so that when the buckets are brought together-as shown in Figs. 1 and 2 the open space between the bottomand the top walls of each bucket will be closed. by the side wall C of the next adjacent bucket.

D are looking or calkingrings of copper or other soft metal which. are tightly driven into the slots A3-A4 to hold the lugs G -C Y firmly in' position and to lock or fasten the separate buckets separately in position. on the rib A when they have been assembled intotheir desired position. D is a welded,

- soldered or brazed joint as the case may be,

I between the outer free edge of the top C and ,the back wall G of the adjacent bucket. One

"- wall of each of the recesses B is indicated in full lines in Fig. 3. The shape of the rib A would prevent the introduction ofthe buckets into slots A and B and in order that they ,may be so introduced, the overhanging edges of the rib A are cut away as indicated in the full lines of Fig. 3 to form the recesses B through" which the lugs or ears 0 and C of the buckets are introduced into the ,slots A and A. The buckets if then pushed around on the rib away from the recesseswill be held in position by the overhanging edge of the rib.

We have shown our buckets as provided with inwardly bent wings, and our rotor with a projecting fiange or rib or ring 'integral with the rotor,,but only as a preferred form for the parts could of course be very differently shaped and diiferently connected together. The essential feature is that the buckets are assembled in a proper manner on the rotor, and secured inposition thereon by two means, one a mechanical means which holds them in proper general relation to each other, and the othera heat process means which holds the individual buckets together. In the particular form here illustrated, the buckets are inserted one by one so as to be held by the rib and then they are welded, soldered, brazed or otherwise by some heat process secured together each to each. Of course they can all be put in position, and then each pairbe securedtogether, or the two processes can be carried on together.

The buckets are made of thin, preferably sheet metal and are of uniform size and shape and do not overlap each other. Such buckets without further attachment and secured one each to the rotor and driven in close proximity to each other are liable to the objection that after a certain amount of use they break off. This breaking is due first to vibration induced by the passage of the steam from within the bucket across-the .edge of the lip between that lip and the next adjacent bucket. The lip is suspended in the air soto speak without any support I along its side edges or at its front, for it is the back, or both.

When the buckets are assembled as indicated for example in Fig. 2 with the solder removed, the impact of the steam upon the back of the bucket will also tend to strain the bucket at the line of connection between the back C of the bucket and the bottom C of the bucket. This is because the back C has no rest or abutment against the lip C It is to obviate these difiiculties and to remove these objections that the invention here set forth was made, the lip being connected with the back or the place between the bridge so as to prevent the escape of steam between them, prevent the vibration of the lip C and give support to each back 0 against'the next adjacent lip so that in addition to the separate attachment of each bucket to the rotor they are all-associated together so as to form, so to speak, a continuous or integral ring of buckets.

We claim: A

1. A bucket wheel for-steam turbines comprising a rotor with a series of thin metallic buckets separately secured thereon and shaped so that the lip of each closely approaches the outside of the back of the next, said lips and backs connected together by a heat process so as to make an integral ring of buckets.

2. A bucket Wheel for steam turbines comprising a rotor with a series of thin metallic buckets separately secured thereon and shaped so that the lip of each closely approaches the outside of the back of the next, said lips and backs connected together by a heat process, including means for bridging the gap, so. as toform an integral ring of buckets.

Signed at Chicago, Illinois, this twentysecond day of July, 1914.

CHARLES W. DAKE. JOHN E. KILKER. Witnesses:

- BESSIE S. RICE, GENEVA HIRTH.

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