Aero-engine rotor assembly measuring device based on four-point weighing and dual-objective optimization method

Abstract

The invention discloses an aero-engine rotor assembly measuring device based on four-point weighing and a dual-objective optimization method. The method comprises the steps of determining angular positioning of a turntable based on a circular grating; ensuring that, based on a centering and tilting device, the measurement and assembly of the concentricity, parallelism, and center of mass coordinates of a measured rotor are performed under the same reference; extracting, based on a four-probe measuring device, a concentricity error of a radial assembly surface and a parallelism error of an axial assembly surface of each stage of rotor, respectively; extracting, based on a four-point weighing measuring device, radial coordinates of the center of mass of each stage of rotor; and obtaining, based on a rotor assembly posture transfer model, an optimal assembly angle of each stage of rotor by genetic optimization taking the coaxiality and offset of the center of mass of the rotor assembly asdual optimization objectives. The device can effectively solve the problem that the coaxiality and the imbalance of the aero-engine rotor after assembly are over standards, and has the characteristics of integrated measurement of rotor geometry and quality characteristics, 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 four-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 abroad...

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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