US2510570A - Rotatable discharge nozzle for fixed combustion chambers - Google Patents

Description

June 6, 1950 R H GODDARD 2,510,570

ROTATABLE D'ISCHARGE NOZZLE FOR FIXED comaus'rxou CHAMBERS Filed March 26, 1946 m y 2.41. WNW-8g; W

Patented June 6, 1950 7 ROTATABLE DISCHARGE NOZZLE FOB FIXED COMBUSTION CHAMBERS Robert H. Goddard, deceased, late of Annapolis, Md., by Esther C. Goddard, executrix, Paxton, Mass, assignor of one-half to The Daniel and Florence Guggenheim Foundation, New York, N. Y., a corporation of New York Application March 26, 1946, Serial No. 657,105 1 Claim. (Ci. Gil-35.6)

This invention relates to the discharge nozzles of combustion chambers as commonly used'in rocket and aircraft operation.

It is the general object of the invention to provide a fixed combustion chamber with a rotatably mounted discharge nozzle and also to provide effective means for rotating the nozzle.

A further object is to provide improved means for utilizing said rotating discharge nozzle as a. convenient source of power. i

The invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed ou in the appended claim.

Preferred forms of the invention are shown in the drawin in which:

Fig. 1 is a sectional side elevation of combustion apparatus embodying the invention;

Fig. 2 is a perspective view of the rotatable nozzle;

Fig. 3 is an enlarged sectional detail ofcertain parts shown in Fig. 1;

Fig. 4 isa perspective view of a nozzle support I or bearing;

Fig; 5 is a reverse perspective view of a pump impeller;

Fig. 6 is a perspective view of a pump casing;

Fig. I is a partial radial section of the im-- peller; and v Fig. 8 is a perspective view showing modified means for taking off power from the rotating nozzle.

Referring to the drawing, a fixed combustion chamber C is shown having a nozzle N rotatably mounted rearward thereof and adjacent thereto. The nozzle N is provided with bearing supports or spiders iii and l I, mounted adjacent the opposite ends thereof and provided with circular tracks l4 and I5 which are'rotatable in a plurali- The small end of the nozzle is outwardly flanged as indicated at 22 (Fig. 3), and is loosely rotatable in an annular casing member 24 of U-shaped cross section which is fixed to the discharge end of the casing of the combustion chamher C. A sealing liquid as water may be supplied to the annular casing 24 through a pipe 26.

A series ofradial vanes 28 are mounted on the entrance face of the fixed annular casing 24 as shown in Fig. 3, and a similar series of radial vanes 30 are mounted on that face of the rotating flange 22 which is more remote from the combustion chamber C. I

With this construction, such portions of the sealing liquid as pass outward around the outside edge of the radial. vanes 30 will be, retained by centrifugal force, and very slight if any leakage will occur between the vopen edge 24a of the annular casing 24 and the outer surface'of the nozzle N.

Any leakage which may occur between the rear end of the combustion chamber C and the adjacent outwardly curved surface of the nozzle N would be unobjectionable, as addition of water to the combustion gases at this point will help to cool the gases and also to increase the volum thereof by the formation of steam.

Provision is thus made for supporting and rotating the nozzle N adjacent the discharge end of the combustion chamber C and for sealing the connection between the fixed and rotating parts. This connection is in a low pressure area where the stream of combustiongases changes direction and begins to expand.

Any convenient means may be provided for taking of! power from the rotating nozzle. In Fig. 1, three centrifugal pumps 40, 4| and 42 are shown mounted on the nozzle N. These pumps may be utilized to supply two diflerent combustion liquids under pressure to the chamber C and a sealing liquid to the pipe 26. These pumps may be of any usual centrifugal type, and each comprises a casing 45 (Fig. 6) surrounded by a volute 46 connected to a discharge pipe 41. An impeller 48 is mounted within each pump casing 45 and is provided with a series of holes 50 through which In Fig. 8 a modified construction is shown in which a nozzle N rotatably mounted adjacent a combustion chamber C is provided with annular sprockets 60 and BI by which chains 62 and 63 may be driven. These chains may extend to sprockets on adjacent shafts or may otherwise be utilized for power purposes.

The utility and advantages of the constructions herein described will be readily apparent.

The invention is not to be limited to the details mounted within said nozzle and projecting into the outer and cooler portion only of the stream of discharge gases in said nozzle, said vanes being operative to rotate said nozzle, a pump impeller mounted directly on said nozzle and rotatable a 4 therewith, a fixed pump casing for said impeller supported coaxial therewith, and means to supply to said impeller a liquid to be pumped.

ESTHER C. GODDARD; Eatec-utria: of the Last Will and Testament of Robert H. Goddard, Deceased.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 832,230 Bettis Oct. 2, 1906 961,216 Dow June 14, 1910 2,145,541 Forsberg Jan. 31, 1939 2,153,640 Podbielniak Apr. 11, 1938 2,283,863 Achterman May 19, 1942 2,302,512 Wilsmann Nov. 17, 1942 2,412,173 Pope Dec, 3, 1946

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