A three-point weighing-based aero-engine rotor assembly measurement device and dual-objective optimization method

Abstract

The invention discloses an aircraft engine rotor assembly measuring device based on three-point weighing and a double-objective optimization method. The double-objective optimization method comprisesthe following steps: determining the angle positioning of a rotary table based on a circular grating; ensuring the measurement and assembling of the concentricity, the parallelism and the center-of-mass coordinate of a measured rotor under the same reference based on an aligning and inclination adjusting device; based on a four-probe measuring device, respectively extracting concentricity errors of radial assembly surfaces and parallelism errors of axial assembly surfaces of all levels of rotors; based on a three-point weighing measuring device, respectively extracting radial coordinates of the mass centers of all levels of rotors; based on a rotor assembly pose transfer model, taking the coaxiality and center-of-mass offset of a rotor assembly as double optimization objectives, and obtaining the optimal assembly angle of each level of rotor through genetic optimization. The method can effectively solve the problem that coaxiality and an unbalance value exceed standard after the rotorof the aircraft engine is assembled, and has the characteristics of integrated measurement of the geometric and quality characteristics of the rotor, high one-time assembly qualification rate and reduction of engine vibration.

Description

technical field [0001] The invention relates to the technical field of mechanical transfer, and relates to a three-point weighing-based aeroengine rotor assembly measurement device and a dual-objective optimization method. Background technique [0002] Aeroengines are the most precise and complex rotating machinery in contemporary industry. Assembly technology is the final process stage in the engine manufacturing process, especially the core components typically represented by high-pressure compressor rotors. The assembly quality directly affects the high-speed operation stability of the engine. sex. [0003] Rotor misalignment and rotor unbalance are the two major causes of aero-engine failures. How to realize the synchronous optimization of rotor misalignment and unbalance in the assembly stage is a key common technical problem that has plagued the aero-engine manufacturing industry at home and abroad for a long time. [0004] At present, research teams at home and abroa...

AI Technical Summary

Problems solved by technology

The problem with this method is that the influence of the quality characteristics of the rotor on the assembly quality is not considered, and the optimization of the rotor unbalance cannot be taken into account while the rotor misalignment reaches the standard.

The problem with this method is that the optimal assembly phase of the rotors at each stage cannot be directly given, and the assembly position can only be fitted layer by layer according to the rotor shape and position tolerance. Assembly position fitting, low assembly efficiency

[0006] At present, the domestic engine rotor assembly technology still largely depends on the operator's skill level and experience, and lacks a high-speed and effective optimization method to guide the assembly of aero-engine rotors to meet the rotor misalignment and unbalance indicators at the same time. Significantly improve the assembly efficiency and one-time assembly pass rate of aero-engine rotors

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