Abstract A construction for connecting a plurality of longitudinally extending and circumferentially spaced ducts defined in a wall of a combustion chamber such as a rocket engine nozzle section includes an annular hollow member or ring having a flat connecting wall which is adapted to be abutted against a similar flat wall of the combustion chamber wall to which it is to be associated. The annular member includes an opening for receiving a connectinc onduit but before the connecting conduit is applied, one or more bores defined in the annular member and communicating with the interior thereof are aligned with corresponding connecting bores defined in the combustion chamber receiving wall to which the device is to be connected. The connecting bores in the securing wall are provided with steps at the location of the junction of an outer bore of large diameter which corresponds to the diameter of the bores of the annular member and an inner bore of small diameter. After the bores are aligned, tubular connecting elements are inserted through the bores of the annular member and into the bores of the receiving member to engage on the steps. The cooling ducts in the wall of the receiving member are initially formed by filling an inner wall portion with filling material in the outline of the ducts and then forming the outer wall portion thereover and removing the filling material by melting. After the connecting tubes are positioned between the annular member and the receiving member the abutting flat surfaces of the annular member and the receiving member are connected together by applying a solder to the outer abutting walls along a widened joint portion formed by a notch in the outer annular member. The two parts are then advantageously heated so the solder flows across the entire abutting joint surface between the annular member and the receiving member. Thereafter, the connecting tube is applied to the annular member and suitably secured and sealed in position such as by welding or by soldering.
A method of forming a combustion chamber wall having longitudinal ducts therein for conducting a cooling fluid therethrough such as a liquid propellant component, comprising milling a plurality of longitudinally extending ducts in an inner wall portion, filling the ducts with a filling material, forming an outer wall over the inner wall and over the ducts by electroplating, drilling at least one bore in through said outer wall into said ducts, melting away the filling material, applying an inner portion of an annular duct around said wall, aligning a bore of the annular duct with an associated bore connecting into the longitudinal ducts of said wall, applying a connecting tube through the bore of the annular duct into the annular bore of the wall, soldering the inner ring portion of the annular duct to the wall, and thereafter applying the outer ring portion to enclose the annular duct.
Claim 2
Independent Claim
148 words
A method of forming a combustion chamber wall having longitudinal ducts therein for conducting a cooling fluid therethrough such as a liquid propellant component, comprising milling a plurality of longitudinally extending ducts in an inner wall portion, filling the ducts with a filling material, forming an outer wall over the inner wall and over the ducts by electroplating, drilling at least one bore in through said outer wall into said ducts, melting away the filling material, applying an inner portion of an annular duct around said wall, aligning a bore of the annular duct with an associated bore connecting into the longitudinal ducts of said wall, applying a connecting tube through the bore of the annular duct into the annular bore of the wall, soldering the inner ring portion of the annular duct to the wall, and thereafter applying the outer ring portion to enclose the annular duct.
Claim 3
Dependent Claim
117 words
A method, according to claim 1, wherein at least two radial bores are drilled through said outer wall into each of said longitudinally extending ducts at spaced longitudinal locations, said annular duct having at least two longitudinally spaced bores which are alignable with respective bores of said wall, applying a connecting tube through the two bores of said ring conduit to engage into the associated bores of the wall in a manner such that there is play between the tubes and the surrounding walls of the ducts adjacent their inner radial ends, and applying solder between said annular ring duct in a manner such that the solder flows around the connecting tubes and secures them in position.