US1283496A - Turbine-blade. - Google Patents

Description

C. GILSON.

TURBINE BLADE. APPLICATION FILED MAR. 15, I91].

1,283,496. Patented Nov. 5, 1918.

INVENTOR.

ATTORNEYS.

UNITED STATES PATENT QFFTGE.

CHRISTIAN GILSON, OF VIILKINSBURG, PENNSYLVANIA, ASSIGNGR T9 WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.

TURBINE-BLADE.

Specification of Letters Patent.

Patented Nov. 5, 1918.

Original application filed December 30, 1914, Serial No. 879,753. Divided and this application filed March 15, 1917. Serial No. 154,979.

To all whom it may concern:

Be it known that I, CHRISTIAN GILsoN, a citizen of the United States, and a resident of Wilkinsburg, in the county of Allegheny and State of Pennsylvania, have made a new and useful Invention in Turbine-Blades, which is a division of application serially numbered 879.753, filed December 30, 191%,

of which the following is a specification.

This invention relates to turbine blades and has for an object to produce a new and improved turbine blade which is integrally formed on a blade carrying element and is especially adapted to be employed in ourbines, rotary compressors, pumps or slmilar apparatus.

A further object of the invention is to produce a new and improved turbine blade which may be easily manufactured and which is strong, durable and rigid.

These and other objects, which will be made apparent throughout the further description of my invention, are attained by means of the blade described and illustrated herein.

in the drawings forminga part hereof, Figure 1 is a sectional view of a turbine rotor equipped with blades embodying my invention.

Fig. 2 is a fragmental sectional view of a rotor clement along the line 2-2 of Fig. 3 and illustrates one step in the construction of blades made in accordance with my invention.

Fig. 3 is a fragmental side elevation of a blade carrying element and illustrates a step in the construction of blades made 1n accordance with my invention.

Fig. at is a fragmental transverse sectional view along the line 4l of Fig. 3.

Fig. 5 is a fragmental perspective view of the blade carrying element illustrated in Fig. 3.

Fig. 6 is a fragmental perspective view illustrating blades formed in accordance with my invention.

Fig. 7 is a fragmental perspective view similar to Fig. 6 and illustrates the blades or buckets equipped with an outer shroud.

My new and improved blades or buckets may be employed for either rotating or stationary blades or buckets of turbines, compressors, or rotary pumps, and they are formed by milling or otherwise formlng relatively thin radially extending flat wings on the peripheral face of the blade or bucket carrying member and then in shapingthe wings so formed to the contour of a blade or bucket. It will be understood by those skilled in the art that while I have illustrated and described radially extending blades, this construction may also be employed for laterally extending blades, such for example as are employed in the usual form of radial flow turbines.

In Fig. 2, I have illustrated a portion of a rotor wheel 5, showin a rim 6 formed on the wheel from which the blades are to be cut. As shown in Figs. 3 and 4, the rim 6 of the rotor wheel 5, or blade carrying element, is

grooved adjacent to the body of the wheel and then milled to form fiat transverse radially extending wings 7. The blank rim 6, as illustrated in Fig. 2, is so formed that a ridge 8 is left on the outer periphery thereof. After the flat wings 7 have been milled the portion of the ridge remaining on each wing 7 forms a shroud engaging tip 9. As shown in Figs. 3, and 5, the grooves formed in the blank rim 6 leave a shroud member 10 on each side of the rotor wheel 5 and spaced therefrom. v The slots by which the flat wings 7 are formed are cut sufliciently deep that they meet the grooves and leave the shrouding members 10 supported by the inner ends of the flat wings 7.

The forming of the blades from the flat wings 7 is accomplished by moving the shroud members 10 inwardly toward the blade carrying element and at the same time slightly shifting both members 10 in the same direction circumferentially of the blade carrying element. This moves the radially extending edges of each wing 7 circumand approximate the required contour closely enough for all practical. purposes after the shroud mei'nbers 10 have been pressed inwardly and move eircumterentially of the blade carrying element.

For some purposes it is desirable to provide the blades With an outer shroud, there fore I have SllOWII in Fig. 7 several blades equipped with an outer shroud member 11. This shroud member 11 is provided with holes 12 through which the shroud engaging tips 9 project. The tips 9 are riveted over and securely lock the outer ends of the Wings or blades 7 together so as to eliminate any danger of vibration or deflection.

In Fig. 1, I have illustrated in section a completed rotor Wheel having its outer periphery provided with blades constructed in accordance With my invention.

While I have described and illustrated the preferred embodiments of my invention it Will be apparent to those skilled in the art, that various changes, modifications, additions and omissions may be made in the apparatus illustrated Without departing from the spirit and scope of my invention, as set forth by the appended claims.

.Vhat I claim is:

1. In combination with the rotor element of a turbine, a plurality of blades integrally formed thereon and ha ving integrally termed shrouding members on the inner ends thereof.

In combination with a blade carrying element. a plurality of blades integrally secured thereto. and shroud members located adjacent to the element and integrally formed with the attached ends of the blades.

In combination with a blade carrying element, a blade integrally formed With said element, and having an integrally formed shroud portion located adjacent to and flush with the fluid directing face of said element.

4. In combination with a blade carrying element, a blade integrally formed with said element and separately formed shroud members located on oppositesides of said element, and integrally formed With the blade.

In combination With a blade carrying element, a plurality of blades mounted thereon and shrouding members integrally formed with the blades and independent of the element and held against the element by the blades.

6. In combination with a blade carrying element a plurality of blades of uniform cross section mounted thereon, said blades having integrally formed shrouding members on the inner ends thereof.

7. In combination with a blade carrying element. a blade secured at a point between its tips to the blade carrying element, and sin-ending members integrally formed with the blade and located on each side of the blade carrying element.

8. In combination. a blade ca rying element, a plurality of blades integrally formed thereon, inner shrouding members integrally formed with the blades and independent of the blade carrying element. an outer shrouding member. and means for securing the outer shrouding member to a plurality of the blades.

9. In combination with a blade carrying element, a blade integrally formed therewith. the point of attachment being at a point intermediate the tips of the blades. and independent. shroud members located on opposite sides of the blade carrying member and cooperating With the outer face taereot in forming a fluid directing assage between the blades said shroud mem ers beilig secured to the blades.

In testimony whereof, I have hereunto subscribed my name this 13th day of March 191(.

CHRISTIAN GILSON.

Witness C. MoGrrun.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of IPateuts. Washington, 3 G.

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