摘要:
A weldment member for a gas turbine engine including a forward welding member and an aft welding member. The forward welding member has an annular shape with a forward welding face formed at one end. The forward welding face has a forward radiographic marking hole formed therein. The aft welding member has an annular shape with an aft welding face formed at one end. The aft welding face has an aft radiographic marking hole formed therein. The forward welding face is aligned with the aft welding face and the forward radiographic marking hole is angularly offset from the aft radiographic marking hole.
摘要:
L'invention concerne le domaine des tuyères propulsives et en particulier à un dispositif (105) pour relier un premier segment (103a) et un deuxième segment (103b) d'une tuyère propulsive en matériaux thermiquement dissimilaires. Ce dispositif (105) comprend au moins une goupille (106) et une douille excentrique (107). La goupille (106) présente une première surface axisymétrique (106a) destinée à être logée dans un orifice radial (108) du premier segment de tuyère (103a) et une deuxième surface axisymétrique (106b) excentrée par rapport à ladite première surface axisymétrique (106a). La douille excentrique (107) présente une surface axisymétrique intérieure (107a) complémentaire de la deuxième surface axisymétrique (106b) de la goupille (106), et une surface axisymétrique extérieure (107b), excentrée par rapport à ladite surface axisymétrique intérieure (107a) et destinée à être logée dans un orifice radial (110) du deuxième segment de tuyère (103b). La présente invention se rapporte également à un procédé d'utilisation de ce dispositif (105) pour relier deux segments (103a,103b) d'une tuyère (3), ainsi qu'à une tuyère propulsive (3) ainsi assemblée) et un moteur fusée (1) la comprenant.
摘要:
The invention relates to a method for producing rotational-symmetrical sheet metal articles with double-curved shape and varying thickness, particularly rocket nozzles, in which a number of sheet metal part-blanks in flat condition are cut to partially circular ring-like shape, whereupon said part-blanks are bent to the desired curvature and welded together to form a blank of the article for final machining. According to the invention the part-blanks are formed by welding together a number of strip-like sheet metal pieces with different thickness of material in flat condition along their straight edges in side-by-side relationship to form a sheet metal plate with a width corresponding to the whole length of the article and with stepwise decreasing thickness of material from one side to the other of said plate, whereupon this sheet metal plate is cut to the shape of a nozzle part-blank with partially circular ring-like shape, and said nozzle part-blank then is bent, and said part-blanks are welded together along their adjacent straight and non-parallel sides to the final blank of the article, which blank finally is subjected to finishing machining, if necessary.
摘要:
La présente invention se rapporte à procédé de fabrication d'une structure d'entrée d'air (1) d'une nacelle de turboréacteur comprenant au moins deux parties constitutives dont au moins une structure de lèvre d'entrée d'air (2) et au moins un capot externe (3) de structure d'entrée d'air, caractérisé en ce qu'il comprend les étapes suivantes visant à : - réaliser séparément les partie constitutives de manière à ce que chacune intègre au moins une portion de recouvrement (2a, 3a) avec la partie à laquelle elle est destinée à être rattachée, - solidariser les portions de recouvrement, notamment par collage et/ou à l'aide de moyens de fixations.
摘要:
An optical system, used for scanning, forms an image using reflective optical surfaces. The system may be telecentric, and may form an image that is reduced in size as compared with the scanned original. Several image-forming optical channels may be combined to form a page-wide scanning array.
摘要:
The invention relates to a liquid fuel rocket engine member. The member has a load bearing wall structure (11, 14) comprising a plurality of cooling channels (11) for handling a coolant flow. Each cooling channel (11) is provided with a flow guiding surface (15) extending at an angle to the cooling channel axis, for providing the axial coolant flow with an added radial directional flow component.
摘要:
A method of manufacturing a channeled wall fluid apparatus (2) is disclosed. The method includes the step of providing at least one rib (16) on one of either a liner (8) having a length or an interior surface of at least a first mold (18). The method also includes the step of placing the first mold around the liner to form a gap (78) between the first mold and the liner. A removable casting material (24) is inserted within the gap. The method also includes removing the removable casting material from within the gap to form at least one channel (14) extending at least a portion of the length of the liner.
摘要:
The invention relates to a method for producing a rocket drive and to a rocket drive which has a combustion chamber (1) and an expansion nozzle (2) which adjoins the combustion chamber (1). At least two single-piece segment bodies (4a, 4b, 4c) are provided, each segment body (4a, 4b, 4c) forming partial contours of the combustion chamber (1) and the expansion nozzle (2). Said segment bodies are brought together in order to form the combustion chamber (1) and the expansion nozzle (2).
摘要:
An outlet nozzle and a method for providing an outlet nozzle (10) for use in a liquid fuel rocket engine. The nozzle forms a body of revolution having an axis (11) of revolution and a cross section that varies in diameter along said axis. The nozzle has a wall structure comprising a plurality of mutually adjacent cooling channels, helically extending substantially in parallel from the inlet end (13) of the nozzle to its outlet end (14). The nozzle comprises at least two longitudinally arranged sections (10a, 10b, 10c). A shift between a positive and a negative channel angle in the transition from one section to an adjacent section balances any roll momentum generated by friction of rocket exhausts against the nozzle wall.