Patent ID: 9724791
Date: 2017-08-08
CPC Classifications: B23P,F01D,F05D,G01B

Claim:
1. A method for assembling a rotor of an aircraft engine, the method comprising: fixing a measured rotor onto a center and inclination adjusting workbench; making a telescopic inductive sensor for measuring an axial mounting datum plane of the measured rotor be in contact with the axial mounting datum plane of the measured rotor; making a lever-type inductive sensor for measuring a radial mounting datum plane of the measured rotor be in contact with the radial mounting datum plane of the measured rotor; driving the measured rotor to rotate at a uniform speed of 6 revolutions per minute (r/min) to 10 r/min by an air bearing turntable of the center and inclination adjusting workbench; conducting sampling on the axial mounting datum plane of the measured rotor at equal intervals by the telescopic inductive sensor for measuring the axial mounting datum plane, and conducting sampling on the radial mounting datum plane of the measured rotor at equal intervals by the lever-type inductive sensor for measuring the radial mounting datum plane, wherein a number of sampling points falls within a range from 1000 to 2000 points per circle; performing a least a square circle fitting on sampling data of the radial mounting datum plane of the measured rotor so as to evaluate an eccentricity and performing a least square plane fitting on sampling data of the axial mounting datum plane of the measured rotor so as to evaluate the inclination; adjusting a center adjusting knob of the center and inclination adjusting workbench according to the size and angle of the eccentricity and adjusting an inclination adjusting knob of the center and inclination adjusting workbench according to the size and angle of the inclination until the center and inclination adjusting workbench is adjusted such that an eccentricity of a radial datum plane falls within a range of 0 to 3 micrometers (μm) and an inclination of an axial datum plane falls within a range from 0 to 2 inches (in.); making a telescopic inductive sensor for measuring an axial mounting measurement surface of the measured rotor be in contact with the axial mounting measurement surface of the measured rotor, and making a lever-type inductive sensor for measuring a radial mounting measurement surface of the measured rotor be in contact with the radial mounting measurement surface of the measured rotor; rotating the air bearing turntable at a uniform speed of 6 r/min to 10 r/min; conducting sampling on the axial mounting measurement surface of the measured rotor at equal intervals by the telescopic inductive sensor for measuring the axial mounting measurement surface, and conducting sampling on the radial mounting measurement surface of the measured rotor at equal intervals by the lever-type inductive sensor for measuring the radial mounting measurement surface, wherein a number of sampling points falls within the range from 1000 to 2000 points per circle; performing a least square circle fitting on sampling data of the radial mounting measurement surface of the measured rotor by the lever-type inductive sensor for measuring the radial mounting measurement surface so as to evaluate concentricity, and performing a least square plane fitting on sampling data of the axial mounting measurement surface of the measured rotor by the telescopic inductive sensor for measuring the axial mounting measurement surface so as to evaluate perpendicularity; obtaining an influence weight value of the measured rotor on a coaxiality of an assembled rotor by combining a radius of the axial mounting measurement surface and a height difference between the measured rotor and the assembled rotor; measuring all rotors required for assembly, respectively, to obtain the influence weight value of each rotor on the coaxiality of the assembled rotor; and performing vector optimization on the weight value of each rotor using an algorithm, and obtaining an assembly angle of each rotor, wherein the influence weight value of the coaxiality of the rotor is calculated according to the following equation: wherein C represents the concentricity of the radial mounting measurement surface of the measured rotor, φ represents an eccentric angle of the fitting center of circle of the radial mounting measurement surface, H represents the height difference between the measured rotor and the assembled rotor, R represents the radius of the axial mounting measurement surface, P represents the perpendicularity of the axial mounting measurements surface of the measured rotor, and θ represents an angle at which the highest point of the fitting plane of the axial mounting measurement surface lies.