摘要:
With the manufacture of turbine engine rotor drums, the opposite joining surfaces of rotor disks are brought into contact and at least one of the two rotor disks clamped into a fixture is set in a circular movement until the joining areas reach a pasty state due to the frictional heat. The circular movement of the rotor disks, in which the axis of the rotor disk moves along a circular path, is optically recorded and deviations due to imbalance are corrected by weight compensation at the fixture. Upon reaching the pasty material state the joining areas weld together, with the rotor disks being at rest and in axial alignment. Manufacture is cost-effective and guarantees precise axial alignment of the rotor disks and a long service life of the engine rotor drums.
摘要:
A protective ring (7) for a fan casing (2) of a gas-turbine engine equipped with a fan having especially metallic fan blades (3) includes a one-piece fiber-composite ring (8) with a ceramic cover (9) arranged on the ring inner surface facing the fan blades, and preferably formed by individual panels embedded in a ductile material, this cover (9)—upon the impingement of broken-off blade fragments—forms a crack network corresponding to an arrangement of the sintered starting ceramic particles and subsequently disintegrates into small particles, thereby absorbing a great part of the kinetic energy caused by the impinging blade fragment. Consequential damage to the protective ring is thereby minimized.
摘要:
An inexpensively manufacturable arrangement for the cooling of thermally highly loaded components, for example the combustion chamber of a gas turbine, comprises cavities (4) provided on the thermally loaded inner surface/air exit side (3) of the wall (1) of the component which are supplied with a cooling medium from the outer surface/air inlet side (5) via cooling air openings (6) and which are covered by a heat resistant wire mesh (7) of a certain permeability. The cavity, which acts as pressure accumulator, forms, in connection with the wire mesh, a uniform pressurized-air film (8) for the cooling and heat shielding of the wall surface.
摘要:
The invention relates to a method for producing components with a high load capacity from α+γ TiAl alloys, especially for producing components for aircraft engines or stationary gas turbines. According to this method, enclosed TiAl blanks of globular structure are preformed by isothermal primary forming in the α+γ− or α phase area. The preforms are then shaped out into components with a predeterminable contour by means of at least one isothermal secondary forming process, with dynamic recrystallization in the α+γ− or α phase area. The microstructure is adjusted by solution annealing the components in the α phase area and then cooling them off rapidly.
摘要:
In a process for the manufacture of a blade/vane of a turbomachine, the blade/vane is made of a metallic enveloping structure and a supporting structure made of composite material provided inside of the enveloping structure and suitably joined to the enveloping structure. A metal-felt weave is welded or soldered/brazed to the sheet making up the enveloping structure, whereupon this sheet-weave-assembly is shaped by hydroforming or an internal high-pressure forming process to provide the enveloping structure of the blade/vane. Finally, the composite material making up the supporting structure is introduced into the cavity of the enveloping structure.
摘要:
A compressor blade 1 of a gas-turbine engine has a flow-exposed leading edge 2. A component 3, made of wear-resistant material and featuring a higher erosive wear resistance than the base material, is attached to at least part of a length of the leading edge 2 The component 3 forming the flow-exposed leading edge 2 is strip-shaped, has an essentially rectangular cross-section and, with reference to a sectional plane perpendicular to the radial direction, is arranged only on an inflow side of the compressor blade profile in a partial area of a sectional surface of the inflow area.
摘要:
A method for manufacturing a metallic component especially configured and designed for a turbomachine includes a) for a precision-casting process, a wax model with a wax structure is produced, subsequently b) the tip of the wax structure is thermally and/or mechanically treated such that a region with an undercut is formed on the wax structure, subsequently c) the metallic component is manufactured from the wax model in the precision-casting process, with a component structural element with an undercut forming on a surface of the component, and d) the component structural element is provided at least partially with a ceramic coating, a plastic-containing coating, in particular a fibre composite layer and/or a plastic component.
摘要:
On an engine shaft of hybrid design with an externally toothed power transmission element connected at the ends of a fiber-composite plastic tube, the power transmission element is of a two-part design and includes a toothed part made of steel of a specific hardness and, frontally weldedly connected thereto, a tapering adapter part enclosed by a fiber-composite material to form a scarf-type joint and having a thermal expansion approximately equal to the expansion behavior of the fiber-composite material.
摘要:
On a low-pressure turbine shaft made of fiber-composite material, the connection to the metallic driven protrusion or the driving protrusion (1), respectively, is made via an adapter (3) formed onto the latter, with pylons (6) extending beyond the circumferential area of the latter and on which the fibers (4) are deflected and guided in accordance with the fiber orientation in the fiber-composite material, enabling high torsional forces to be transmitted via the small connecting zone.
摘要:
A method for manufacturing a workpiece 1, 2 uses a forming tool 4, 5 having a cavity 3. An embossing element 6 profiled on at least one surface is arranged on at least one surface of the forming tool 4, 5 for producing a surface structure, and with the profile of the embossing tool 6 is imparted to the surface of the workpiece 1, 2 during a forming process.