Mechanical sealing end surface deformation measurement system based on binocular vision DIC and measurement method thereof

Abstract

The invention discloses a mechanical sealing end surface deformation measurement system based on binocular vision DIC and a measurement method thereof. The system comprises a mechanical sealing test device, high-speed digital cameras, lenses, acquisition cards, a light source, a calibration plate, a support system, and a server for digital image acquisition and correlation analysis and processing. The measurement method altogether comprises eight steps. A speckle image on the surface of a mechanical sealing static ring in an operation condition can be acquired, the image can be analyzed and processed by directly using the binocular vision digital image correlation method, and thus, a three-dimensional shape on the surface of the mechanical sealing static ring, and a three-dimensional deformation field under effects of force and thermal load can be acquired. According to the method, the use is convenient, the measurement precision is high, the full-filed measurement problem of surface deformation under effects of force and thermal load of mechanical sealing can be effectively solve4d, and foundation is laid for making a research on key factors influencing mechanical sealing deformation and exploring measures for reducing deformation.

Description

technical field [0001] The invention relates to a measurement system and a measurement method for the three-dimensional shape of the end face of a mechanical seal and the three-dimensional deformation of the whole field under the action of force and thermal load, belonging to the fields of optical measurement mechanics, mechanical seal displacement and deformation testing technology, and the like. Background technique [0002] Mechanical seals are widely used in machinery, petroleum, chemical industry, and electric power due to their advantages such as good sealing performance, long service life, no adjustment during operation, small power loss, no wear on the surface of the shaft or sleeve, strong vibration resistance, and high sealing parameters. Sealing of rotating shafts in industrial equipment such as light industry, ships, aerospace and atomic energy. [0003] Mechanical seals are generally composed of sealing pairs (moving ring 4 and static ring 5), elastic elements (...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a kind of mechanical seal end face deformation measurement system and measurement method based on binocular vision DIC. The full-field measurement of deformation has the advantages of simple structure of the measurement system, convenient use, and high measurement accuracy.

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