Abstract:
In order to provide an annular combustion chamber (3) which can be heated without thermal distortion, expands without distortion, and is reliably closed, and for repairs can be opened and permanently closed again and can be reconditioned, the inner and/or outer shell (8, 7) of an annular combustion chamber (3) is produced from a rotationally symmetrical sheet metal. For assembly, the shells are cut open along a split line (16), and the lower half of the inner and of the outer shell (8, 7) is introduced into the lower casing half of a gas turbine. After the insertion of the rotor, the two upper shell halves can likewise be inserted and be connected to the lower halves by welding. In order to improve the service life of the split line weld seam (21), film cooling of the weld seam is routed by an indentation. This may be implemented, for example, by welded-in split line elements (15) which are also suitable for retrofitting.
Abstract:
A platelike projecting component portion of a component used in gas turbines or other similar applications includes a surface upon which hot gas acts and cooling bores through which a cooling medium is capable of flowing. Effective cooling is achieved by providing at least one plenum assigned solely to the component portion. The plenum is arranged so as to be directly adjacent to the surface upon which hot gas acts and through which the cooling medium is capable of flowing to provide convective heat transfer. The cooling bores are designed as blow-out orifices which emanate from the plenum and issue the cooling medium onto the surface upon which hot gas acts, thereby forming a cooling film.
Abstract:
The invention relates to components made from ductile metallic materials, and to a method with which deformation or the load acting on these materials is to be determined by means of acoustic emissions analysis. For this purpose, a particulate substance which is brittle at least in the temperature range below 400° C. is added to the ductile metallic material, which may preferably be a weldable structural steel, but may also be a ductile light metal alloy (e.g. aluminum alloy), in order to intensify the acoustic emissions behavior. The particles should be brittle at least in the temperature range of use of the component in question, e.g. at room temperature. It is advantageous if the particles are also plastically deformable in the forming temperature range, so that a certain structure (elongate or acicular) of the particles can be achieved, for example during cold work-hardening.
Abstract:
The invention relates to an anode assembly for electroplating comprising (a) an anode body comprising soluble anode material and (b) a shielding covering at least part of the anode body and comprising a self-passivating metal electrically connected to the anode body and allowing electrolyte transport therethrough. The shielding comprises at least one layer of self-passivating metal having no openings larger than 2 mm, preferably 1 mm, in width or the shielding comprises at least two layers of self-passivating metal wherein the openings of at least one layer are at least partially covered by the metal of another layer. The invention also relates to a shielded anode basket, a method for electroplating and the use of the anode assembly and the shielded anode basket.
Abstract:
In a gas-turbine guide element (30) around which a hot air flow (23) flows and which, at least in a trailing edge region (21), in which the air flow (23) separates from the guide element (30), comprises at least two walls (10, 11) arranged essentially in parallel and connected to one another by ribs (16, 17, 20) in such a way as to form internal cooling passages (18, 19, 25, 26, 27), and which is cooled on the inside with cooling medium (28, 29) flowing through the cooling passages (18, 19, 25, 26, 27), the cooling medium discharging from the guide element (30) at the trailing edge (21) essentially parallel to and between the walls (10, 11), and in a method of producing it, easier reworking and less susceptibility to foreign particles are achieved owing to the fact that at least some of the ribs are arranged as choke ribs (24) so as to terminate essentially flush with the trailing edge (21).