Method for machining an integrally bladed rotor
First Claim
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1. A method for machining an integrally bladed rotor of a fluid-flow machine, comprising the steps of:
- a) providing an integrally bladed rotor having a main rotor body and several rotor blades integrally attached to the main rotor body;
b) determining a natural frequency of each rotor blade of the integrally bladed rotor; and
c) machining at least one rotor blade of the integrally bladed rotor by removing material to adjust the natural frequency of the at least one rotor blade to a specified value;
wherein the at least one rotor blade of the integrally bladed rotor is machined through material removal in an area of a radially inward lying transition section between the main rotor body and the rotor blade such that a radius of a fillet formed between the main rotor body and the rotor blade of the integrally bladed rotor varies as a result of the material removal.
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Abstract
A method for machining an integrally bladed rotor of a fluid-flow machine is disclosed. In accordance with an embodiment of the invention, the method includes the steps of: a) providing an integrally bladed rotor having a main rotor body and several rotor blades integrally attached to the main rotor body; b) determining the natural frequency of each rotor blade of the integrally bladed rotor; and c) machining at least one rotor blade of the integrally bladed rotor by removing material to adjust the natural frequency of the particular rotor blade to a specified value.
15 Citations
16 Claims
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1. A method for machining an integrally bladed rotor of a fluid-flow machine, comprising the steps of:
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a) providing an integrally bladed rotor having a main rotor body and several rotor blades integrally attached to the main rotor body; b) determining a natural frequency of each rotor blade of the integrally bladed rotor; and c) machining at least one rotor blade of the integrally bladed rotor by removing material to adjust the natural frequency of the at least one rotor blade to a specified value; wherein the at least one rotor blade of the integrally bladed rotor is machined through material removal in an area of a radially inward lying transition section between the main rotor body and the rotor blade such that a radius of a fillet formed between the main rotor body and the rotor blade of the integrally bladed rotor varies as a result of the material removal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for modifying a vibration characteristic of a rotor blade of an integrally bladed rotor of a gas turbine, comprising the steps of:
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determining a natural frequency of the rotor blade of the integrally bladed rotor; and machining the rotor blade to modify the natural frequency of the rotor blade; wherein the rotor blade of the integrally bladed rotor is machined through material removal in an area of a radially inward lying transition section between a main rotor body and the rotor blade such that a radius of a fillet formed between the main rotor body and the rotor blade of the integrally bladed rotor varies as a result of the material removal. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method for modifying a vibration characteristic of a rotor blade of an integrally bladed rotor of a gas turbine, comprising the steps of:
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determining a natural frequency of the rotor blade of the integrally bladed rotor; and modifying the natural frequency of the rotor blade by removing material in an area of a radially inward lying transition section between a main rotor body and the rotor blade such that a radius of a fillet between the main rotor body and the rotor blade of the integrally bladed rotor varies as a result of the removing material.
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Specification