Device and method for measuring deformation of high-speed rotating object under high-temperature environment

Abstract

A device and a method for measuring the deformation of a high-speed rotating object under a high-temperature environment relate to the fields of materials, optical experiment, solid mechanics, and the like. According to the method, two groups of laser reflector plates are pre-installed on the surface of a measured object, wherein the reflector plates for measuring radial deformation are installed along the radial direction, and the reflector plates for measuring circumferential deformation are installed along the circumferential direction; the object is irradiated with a laser source when rotating at high speed, and the reflector plates reflect laser when being irradiated; the reflector plates installed along the radial direction reflect laser to a laser receiving screen, reflected laser spots on the receiving screen are shot by a high-speed camera, and the radial deformation is calculated according to the change in spot spacing; and laser reflected by the reflector plates installed along the circumferential direction is received by the same laser receiver successively to form pulse signals at time intervals, and the deformation of the object is measured according to the change in time interval. The method makes full use of the flexibility of optical devices, is easy to operate and implement, and can be applied to deformation measurement of rotating parts such as aircraft engines and heavy-duty gas turbine blades.

Description

technical field [0001] The invention relates to a method for measuring the deformation of a high-speed rotating object in a high-temperature environment by using the principle of laser reflection, and belongs to the technical fields of solid mechanics, material science and optical experiments. Background technique [0002] In aerospace, thermal power, nuclear power generation and other fields, engines and heavy-duty gas turbines are widely used. In the ground assessment tests of engines and heavy-duty gas turbines, the deformation of the hot end parts is an important factor for evaluating the assessment results. Turbine blades, rotors As an important part of the hot-end parts, rotating parts such as rotating shafts and rotating shafts, the deformation measurement of high-speed rotation in high-temperature environments has important guiding significance for evaluating their life and thermodynamic indicators. The basic guarantee factor of the first-generation engine project is...

AI Technical Summary

Problems solved by technology

However, when the object is in a state of high-speed rotation, the existing two measurement methods are no longer applicable

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