Method and apparatus for geometric rotor stacking and balancing
First Claim
1. A computer-based method for correcting imbalance of a rotor assembly for a turbine engine, comprising the steps of:
- given a rotor assembly formed of discs and components, each disc for carrying a respective set of rotor blades or bolts-and-washers;
using a computer, calculating for each disc and component of the rotor assembly a respective centerline deviation and an angular location of the disc and component with respect to a centerline of the rotor assembly defined based on a mathematical model of the rotor assembly; and
iterating through the computer rotor blade and bolt-and-washer distributions and determining through the computer rotor blade and bolt-and-washer distribution throughout the rotor assembly based on (a) the calculated centerline deviations and the angular locations of the discs and components of the rotor assembly and (b) respective weight of each rotor blade or bolt-and-washer, the rotor blade or bolt-and-washer distribution providing rotor blade or bolt-and-washer locations which offset the centerline deviations by weight and result in a balanced rotor assembly.
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Accused Products
Abstract
A computer method or corresponding system for optimally balancing a rotor assembly. The computer system defines a theoretical centerline based on a mathematical model of the rotor assembly. For each disc or component of the rotor assembly, the invention system calculates rotor blade or bolt and washer distribution, based on calculated centerline deviations and angular locations of the discs and effective weights of rotor blade or bolt-and-washer sets. The rotor blade or bolt-and-washer distribution provides locations for placement of the rotor blades or bolts-and-washers so as to offset the centerline deviations and thus correct imbalance of the rotor assembly.
29 Citations
25 Claims
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1. A computer-based method for correcting imbalance of a rotor assembly for a turbine engine, comprising the steps of:
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given a rotor assembly formed of discs and components, each disc for carrying a respective set of rotor blades or bolts-and-washers; using a computer, calculating for each disc and component of the rotor assembly a respective centerline deviation and an angular location of the disc and component with respect to a centerline of the rotor assembly defined based on a mathematical model of the rotor assembly; and iterating through the computer rotor blade and bolt-and-washer distributions and determining through the computer rotor blade and bolt-and-washer distribution throughout the rotor assembly based on (a) the calculated centerline deviations and the angular locations of the discs and components of the rotor assembly and (b) respective weight of each rotor blade or bolt-and-washer, the rotor blade or bolt-and-washer distribution providing rotor blade or bolt-and-washer locations which offset the centerline deviations by weight and result in a balanced rotor assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A computer system for correcting imbalance of a rotor assembly for a turbine engine, comprising:
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given a rotor assembly being formed of discs and components, each disc for carrying a respective set of rotor blades or bolts-and-washers, a calculation module configured to calculate a centerline deviation and an angular location of the disc and component for each disc and component of the rotor assembly with respect to a defined centerline of the assembly based on a mathematical model of the rotor assembly; and a determination module configured to iterate rotor blade and bolt-and-washer distributions and to determine rotor blade or bolt-and-washer distribution throughout the rotor assembly based on (a) the calculated centerline deviations and the angular locations of the discs and components of the rotor assembly and (b) respective weight of each rotor blade or bolt-and-washer, the rotor blade or bolt-and-washer distribution providing rotor blade or bolt-and-washer locations which offset the centerline deviations and result in an optimally balanced rotor assembly. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification