Aero-engine rotor air floatation assembling method and device based on inductance measurement

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings:

[0021] An aeroengine rotor air float assembly method and device based on inductance measurement. The method and device are as follows: a three-jaw hydraulic chuck 4 is arranged on a center position of a centering and tilting table 3. The left upright 5a and the right upright 5b are symmetrically distributed on both sides of the air bearing shaft 2 and fixedly mounted on the base 1. On the left column 5a, the left upper column connecting piece 7c and the left lower column connecting piece 7a are movably and adjustablely fitted from top to bottom. The left upper horizontal measuring rod 6c is horizontally nested on the left upper column connecting piece 7c, and the upper lever type inductor The sensor 8b is fixedly connected to the upper left lateral measuring rod 6c; the lower left lateral measuring rod 6a is horizontally nested on the lower left pillar connecting piece 7a, and the lower lever type inductive sensor 8a is fixedly connected to the lower left lateral measuring rod 6a. On the right column 5b, the right upper column connecting piece 7d and the right lower column connecting piece 7b are movably and adjustablely fitted from top to bottom. The right upper horizontal measuring rod 6d is horizontally nested on the right upper column connecting piece 7d, and the upper telescopic type The inductive sensor 9b is fixedly connected to the upper right lateral measuring rod 6d; the lower right lateral measuring rod 6b is horizontally nested on the lower right pillar connecting piece 7b, and the lower telescopic inductive sensor 9a is fixedly connected to the lower right lateral measuring rod 6b. The air bearing shaft system 2 is nested on the center position of the base 1. The air bearing shaft system 2 consists of an air bearing main shaft 2a, a worktable 2b, an upper pressure plate 2c of the air bearing shaft, a lower pressure plate 2d of the air bearing shaft, and a grating ruler. The reading head 2e and the grating ruler 2f are constituted. The worktable 2b is arranged on the upper end of the pressure plate 2c on the air shaft, the pressure plate 2c on the air shaft is arranged on the upper end of the air shaft 2a, and the air shaft 2a is arranged on On the upper end of the lower pressure plate 2d of the air bearing shaft, the grating ruler 2f is nested on the outer ring of the lower pressure plate 2d of the air bearing shaft, and the grating scale reading head 2e is arranged at the lower part of the inner center of the base 1 and outside the grating ruler 2f. The air bearing shaft 2 drives the measured rotor to rotate at a constant speed of 6-10r/min. The lower telescopic inductive sensor 9a performs sampling at equal intervals on the axial installation reference surface of the measured rotor, and the lower lever-type inductive sensor 8a is The radial installation datum surface of the measured rotor is sampled at equal intervals, and the number of sampling points should meet 1000~2000 points per circle. The sampling data on the radial installation datum surface of the measured rotor is fitted by least squares circle to evaluate The amount of eccentricity is to fit the sampled data on the axial installation datum plane of the measured rotor through the least squares plane to evaluate the amount of inclination; the self-aligning tilting table 3 is arranged on the center position of the air bearing shaft system 2, according to the amount of eccentricity Adjust the centering and tilting worktable 3 until the eccentricity of the radial reference plane is within the range of 0~3μm; according to the size and angle of the tilt, adjust the centering and tilting worktable 3 until it meets the axial The amount of inclination of the reference plane is within the range of 0~2". The right upper pole connecting piece 7d is vertically nested on the upper side of the right upright 5b, and the right upper horizontal measuring pole 6d is horizontally nested on the right upper pole connecting piece 7d. The telescopic inductive sensor 9b is fixedly connected to the upper right lateral measuring rod 6d, and the upper telescopic inductive sensor 9b is in contact with the axial installation and measuring surface of the measured rotor, and the left upper pillar connecting piece 7c is vertically nested on the upper side of the left pillar 5a , The upper left lateral measuring rod 6c is horizontally nested on the upper left pillar connecting piece 7c, the upper lever-type inductive sensor 8b is fixedly connected to the upper left lateral measuring rod 6c, and the upper lever-type inductive sensor 8b is in contact with the radial installation measuring surface of the measured rotor ; The air bearing shaft 2 rotates at a constant speed of 6-10r/min, the upper telescopic inductive sensor 9b samples at equal intervals on the axial installation measuring surface of the measured rotor, and the upper lever-type inductive sensor 8b measures the diameter of the measured rotor. Sampling at equal intervals on the installation measuring surface; the number of sampling points should satisfy 1000~2000 points per circle; the data sampled by the upper lever-type inductive sensor 8b on the radial installation measuring surface of the measured rotor is fitted by the least squares circle The concentricity is evaluated; the data sampled by the upper telescopic inductance sensor 9b on the axial installation measurement surface of the measured rotor is fitted with the least squares plane and the verticality is evaluated, combining the radius of the axial installation measurement surface and the measured surface Measure the height difference between the rotor and the final assembled rotor to obtain the influence weight of the rotor on the coaxiality of the assembled rotor; separately measure all the rotors required for assembly to obtain the influence weight of each rotor on the coaxiality of the assembled rotor; The weight of each rotor is optimized by genetic algorithm, and The calculation method of the influence weight of the rotor coaxiality to the assembly angle of each rotor is: In the formula: C represents the concentricity of the measuring surface of the measured rotor radial installation, It represents the eccentric angle of the fitting circle center of the radial installation measuring surface, H represents the height difference between the measured rotor and the final assembled rotor, R represents the radius of the axial installation measurement surface, and P represents the perpendicularity of the measured rotor axial installation measurement surface. θ represents the angle at which the highest point of the fitting plane of the axially installed measuring surface is located.