Large-scale high-speed rotation equipment assembly stress measurement method based on critical refraction longitudinal waves

Abstract

The invention discloses a large-scale high-speed rotation equipment assembly stress measurement method based on critical refraction longitudinal waves, and belongs to the technical field of rotor stress measurement. According to the invention, the problems that the measured spatial resolution and the separation of the critical refraction longitudinal wave signal cannot be ensured at the same time in the stress measurement of the existing large rotary equipment, and the problems that the traditional ultrasonic method is low in measurement efficiency and poor in measurement precision and causes corrosion to the surface of a rotor are solved. The method is realized by adopting a measuring device, and the measuring device comprises a transmitting wheel, a first receiving wheel, a second receiving wheel, a transmitting transducer mounted in the transmitting wheel, a first receiving transducer mounted in the first receiving wheel and a second receiving transducer mounted in the second receiving wheel. The transmitting wheel, the first receiving wheel, and the second receiving wheel are arranged side by side. The axes of the transmitting wheel, the first receiving wheel and the second receiving wheel are arranged in parallel. The transmitting wheel and the two receiving wheels are filled with the coupling agent, and the situation that in the prior art, the coupling agent must make contact with the surface of the rotor when a traditional ultrasonic method is used is effectively avoided.

Description

technical field [0001] The invention relates to a method for measuring assembly stress of large-scale high-speed rotary equipment based on critically refracted longitudinal waves, and belongs to the technical field of rotor stress measurement. Background technique [0002] Aero-engine rotor-stator parts will generate stress during the manufacturing process, and the resulting stress state varies greatly with various processing methods or processing methods. Mechanical processing such as extrusion, drawing, rolling, correction, cutting, grinding, surface rolling, shot peening or hammering, etc., as well as thermal processing welding, cutting, etc., inevitably cause stress and uneven stress distribution, It will have a significant impact on the fatigue strength, static strength, structural deformation and service life of the rotor-stator parts of the aero-engine, and even cause serious stress concentration, which will lead to microcracks in the rotor-stator parts of the aero-en...

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problem that the spatial resolution of the measurement and the separation of the critical refraction longitudinal wave signal cannot be guaranteed at the same time in the stress measurement of the existing large-scale rotary equipment, and the traditional ultrasonic method has low measurement efficiency, poor measurement accuracy and damage to the rotor surface. Corrosion problems are caused, and a method for measuring assembly stress of large-scale high-speed rotary equipment based on critical refraction longitudinal waves is provided

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