摘要:
A centrifugal impeller for a turbomachine characterized in that it comprises a plurality of aerodynamic vanes ( 13), each of them (1 3) having internal walls on which is associated a fabric element (I A; S B; 1 C; 4: 5: 6; 7; 37).
摘要:
In einem Herstellungsverfahren für geschlossene Laufräder mit Schaufeln (2, 2a), zwischen denen Schaufelkanäle (3) ausgebildet sind, die eine vorgegebene Form aufweisen, werden mittels einer programmgesteuerten Zerspanungsvorrichtung in einem Rohling spanabhebend Öffnungen für die Schaufelkanäle erstellt. In dem Herstellungsverfahren werden in einem weiteren Arbeitsschritt Elektroden (11) einer Vorrichtung zum Funkenerodieren oder zum elektrochemischen Abtragen in die Öffnungen eingeführt und ein Teil der vorgegebenen Form der Schaufelkanäle (3) mittels Funkenerodieren oder mittels elektrochemischen Abtragens hergestellt.
摘要:
This disclosure describes new high temperature, radiation-resistant, ferritic-martensitic steel compositions. The new steels generally contain 9.0-12.0 wt. % Cr, 0.001-1.0 wt. % Mn, 0.001-2.0 wt. % Mo, 0.001-2.5 wt. % W, and 0.1-0.3 wt. % C, with the balance being primarily Fe. More specifically, steels having from 10.0-12.0 wt. % Cr are considered particularly advantageous. Small amounts of N, Nb, V, Ta, Ti, Zr, and B may or may not also be present, depending on the particular embodiment. Impurities may be present in any embodiment, in particular impurities of less than 0.01 wt. % S, less than 0.04 wt. % P, less than 0.04 wt. % Cu, less than 0.05 wt. % Co, and less than 0.03 wt. % As are contemplated. Examples of these steels exhibit improved fracture toughness and reduced thermal creep and swelling.
摘要:
A turbopump such as a liquid oxygen (LOX) turbopump for a liquid rocket engine is formed using a metal additive manufacturing process in which a single-piece impeller is formed within a single piece housing, the impeller being trapped within the single piece housing. The impeller is formed with an axial bore in which a shaft is inserted after the impeller and housing have been formed. The turbopump includes a protective coating that forms a reaction resistant surface on the base metal in areas of the base metal that are exposed to an oxidizer during pumping. The protective coating may be an enamel glass, a superalloy layer beneath an enamel glass layer, a composite layer of a mixture of enamel glass and superalloy, a composite mixture of oxide and superalloy, or a composite layer of a mixture of enamel glass, superalloy, and oxide.
摘要:
The present invention relates to a pump impeller (1) having a front plate (2), a back plate (3), and impeller blades (4) between the front and the back plates (2, 3), wherein the impeller blades (4) consist of a base material, which is more resilient than the base material of the front plate (2) and/or the back plate (3).
摘要:
A non-metallic vertical turbine pump (20) and a method of manufacturing same are provided. In accordance with one embodiment, the vertical turbine pump (20) can include a motor (22), and a drive shaft (28) coupled to the motor (22) for rotation, a casing (38) with a mixed flow diffuser (50) including a diffuser hub (52) and diffuser vanes (56) that project out from the diffuser hub, and a mixed flow impeller (30) configured to rotatably fit inside the casing (38), having an impeller hub (46), impeller vanes (48), extending from the hub, and a front (47) and a back shroud (49) connected to opposing ends of the impeller vanes. At least one of the mixed flow impeller (30) and the mixed flow diffuser (50) can be made of a non- metallic material and is a singular homogenous component.