Apparatus and method for joining a rotor blade to a rotor mount of a gas turbine rotor
AssigneeMTU Aero Engines AG
InventorKarl-Hermann Richter
Life of this patent
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Abstract
A gas turbine rotor and a method for manufacturing a gas turbine rotor having integral blading, is disclosed. A rotor blade has a blade pan and a blade footing connected to the blade pan. The blade footing is designed with a V-shaped cross section in at least some portions and the blade footing is welded to a rotor mount by capacitor discharge welding.
Claims7
A method for manufacturing gas turbine rotors having integral blading, wherein a plurality of rotor blades comprised of a blade pan and a footing of the blade connected thereto are mounted on a rotor mount, by capacitor discharge welding, wherein the footing of the blade includes a V-shaped cross section serving to provide contact between the rotor mount and the footing in the capacitor discharge welding and wherein the blade footing includes a non-V-shaped portion disposed between the V-shaped cross section and a groove defined by the rotor blade that extends along a length of the rotor blade, wherein a tool is engaged in the groove and a pressure force is applied to the rotor blade by the tool, and wherein thickened areas and/or protruding material and/or welding notches are machined off to a final contour of the gas turbine rotors having integral blading.
A gas turbine rotor, comprising:
- a rotor blade having a blade pan and a blade footing, wherein the blade footing includes a V-shaped portion;
- and
- a rotor mount defining a recess therein;
- wherein the V-shaped portion of the blade footing is disposed within the recess of the rotor mount;
- and wherein the blade footing includes a non-V-shaped portion disposed between the V-shaped portion and a groove defined by the rotor blade that extends along a length of the rotor blade.
A method for joining a rotor blade to a rotor mount of a gas turbine rotor, comprising the steps of:
- disposing a V-shaped portion of a blade footing of the rotor blade in a recess defined by the rotor mount;
- and
- welding the V-shaped portion to the rotor mount by capacitor discharge welding;
- wherein the blade footing includes a non-V-shaped portion disposed between the V-shaped portion and a groove defined by the rotor blade that extends along a length of the rotor blade and further comprising the steps of engaging a tool in the groove and applying a pressure force to the rotor blade by the tool.
Dependencies are inferred from the claim text.