US1050187A - Blade-mounting. - Google Patents

Description

I BY I vi. [5 ATTORNEY I G. WESTINGHOUSE. BLADE MOUNTING. APPLICATION FILED we. 4, 1910.

1105G187 Patented Jam-14,1913.

WITNEQSSES: W? W m INVENTOR.

UNITED STATES GEORGE WESTINGHOUSE, 0F PTTTBURGH, PENNSYLVANIA.

BLADE-MOUNTING.

Specification of Letters Iatent. .Patented Jan. 14, 1913.

Application filed August 4, 1910. Serial No. 575,570

To all whom 2'25 may concern:

Be it known that I GEORGE WESTINGHOUSE, a citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have made a new and useful Invention in Bladehlountings, of which the following is a specification.

My invention relates to means for mounting blades, such for example as turbine blades, in place on a blade-carrying element.

An object of my invention isto produce means for mounting blades, such that the blades will be accurately spaced and held firmly in place on the blade-carrying element. I

A further object is to produce means whereby a plurality of blades, or all the blades of a blade section, may be simultaneously mounted in place on the blade-carry ing'element.

These and other objects I attain by means of apparatus embodying'the features herein described and illustrated.

In the drawings accompanying this application and forming a part thereof, I have illustrated my invention in connection with the rotating blades of a turbine, with no idea of in any way limiting my invention.

Figure 1 is a perspective view of a turbine blade which forms a detail of my invention; Fig. 2 is a fragmental perspective view of a row of turbine blades in connection with a mounting element embodying my invention; Fig. 3 is a fragmental transverse section of a'rotatable blade-carrying element, and illustrates a slightly modified form of my invention.

Referring to Figs. 1 and 2: The blade mounting element, illustrated as embodying my invention, is formed in two pieces 4 and 5 which are respectively provided with blade mou'nting slots 6 and 7, adapted to cooperate in receiving the bases of the blades 8 and in looking the blades in place. The piece or member t may be formed integrally with the blade-carrying, or rotor element of the turbine, as shown, or it may be secured in place in any suitable manner. The slots 6 extend across and into the peripheral face of the member 4, at an angle to the longitudinal axis of the rotor element, and are open along the lateral faces of the element so that the base portions of the blades may be intro duced laterally into them. i

The piece or member 5 may be ringshaped, but for convenience of construction "it is preferably formed in segments and is adapted to be mounted on a shoulder 9 formed on the blade carrying element adjacent to the member 4. Slots 7 extend across and into the peripheral face ,of the member 5 at an angle equal, but opposite, to the angle of the slots 6, with reference to the lon-v gitudinal axis of the blade mounting element. The slots 6 and 7 are so arranged that they cooperate to form substantially V shaped slots in the periphery of the blademounting elernent, when the member 5 is in place. 1

Each blade is provided with a base portion 10, so formed that it is'adapted to snugly fit into the V shaped slots. Before mounting the blades Son the blade-carrying element I preferably string them loosely on a wire or strip 11 which extends through openings, formed in the base of each blade at the apex or rldge between the incl ned portions of the base. A groove 12 is formed in the lateral face of the member 4, across the slots 6, and is adapted to receive the strip 11 when the bases of the blades are in place in the slots 6. A correspondingly located groove is provided in the lateral face of the member 5 and is adapted to register and cooperate with the groove 12 in receiving the strip 11 and securing it in place.

In mounting the blades 8, I preferably,

proceedas follows: I first string the blades on the wire or strip 11, and then insert one leg, of the angular base portion of each blade, into one of the slots 6 of the member et so that adjacent blades are located in adjacent slots and so that the wire or strip 11 is located in the groove 12. The member 5 is then moved to place, during which operation the projecting legs of the base portions of the blades are slipped into the slots 7. After the member 5 is in place on the shoulder 9 and in contact with the .the same time. After the member is se-.

"cured in place the cooperating grooves formed in the members 4 and 5 positively carrying element.

lock the wire or strip 11 in place and therefore positively lock the blades to the blade- The V shaped slots {formed by the cooperation of the slots 6 'and 7, in conjunction with the V shaped base portions of the blades, are effective in preventing lateral displacement of the blades. I have shown the blades 8 provided with forwardly extending flanges formed at the ends of the blades and adapted to cooperate, when the blades are mounted in a row, to forma shrouding. It will be apparent, however, that any means may be employed for s acing and locking the outer en sfof the bla s together.

In Fig. 3 I have shown a slight modification of myinvention in connection with a rotor element which maybe employed,

either in a turbine, a fluid compressor or exhauster. The rotor-element consists of a hub or spindle 16, mounted on a shaft 17, and provided with an annular flange 18, on

- which circular blade-carrying disks 19 and means:v of a' rod or wire 11, as previously described, which extends through openings inthe bases of the blades and a groove cor-.

responding to the groove 12 is provided in the lateral face of the disk 19 for receiving -therod wire or strip 11. The disk 20 is provided" on its peripheral edge-with slots which correspond to the slots 7 of the mem her-H5 of Fig. 2, and the function. of this '20 and securing the blades 8 in place. The

disks are preferably, but not necessarily, se-

cured to the flanges. 18 of the spindle 16 by means of rivets 21 and the outer edge of the disks are secured together by means of rivets 22. It will be apparent that the operation of securing the disks together locks the blades 8 in place on the disks and completes the rotor element.

-Having thus described whatI claim is:

1. In combination with a plurality of blades, a strip extendin through openings in the bases of the bla es, a turbine rotor slotted and provided with. an annular groove, aremovable member provided with slots co-. operating with the slots in said rotor to reoeive the bases of the blades and a groove comy invention,

operating with the groove of the rotor to receive and lock in place said strip and means for securing said removable member in place.

2. In combination with aturbine rotor provided with laterally extending blade slots, of a removable member having, slots 00- operating with the slots in said rotor, blades mounted in said slots and a locking strip for securing said blades ,in said slots;

In testimony whereof, I have hereunto subscribed my name this 3rd day of Aug,

. GEO. WESTINGHOUSE Witnesses:

B. B. Hnvns, E. M. MoGALms'rER.

Copies o'iflfis patent may be obtained for five cents each, by addressing the f Commissioner of Patent!- Washington, D. G."

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