Bolt pre-tightening force degradation process real-time detection device considering high-temperature creep

Abstract

The invention relates to a bolt pre-tightening force degradation process real-time detection device considering high-temperature creep. The detection device includes a pre-tightening force acquisition system (A), a bolt clamping connecting device system (B) and a heating system (C), wherein the three systems are connected with one another. The detection device has the advantages of low construction cost, small size, portable convenience and convenience in high temperature creep simulation under real conditions. With the bolt pre-tightening force degradation process real-time detection device adopted, a high temperature environment can be provided, so that a creep process of a bolt in a use process can be accurately simulated, and at the same time, the numerical value of a pre-tightening force can be acquired in real time and can be fed back to a computer. The detection device has a bright application prospect in the engineering material testing apparatus and equipment technical field.

Description

technical field [0001] The invention relates to a real-time detection device for the degradation process of bolt pretightening force considering high temperature creep, and belongs to the technical field of engineering material testing instruments and equipment. Background technique [0002] Bolt connection is the most widely used assembly method on mechanical products. In aero-engines, some important bolt connections have a decisive impact on the reliability of the engine. In order to ensure the safe and reliable operation of the high-speed rotating rotor, it is necessary to adjust the bolt tightening torque to apply an appropriate axial preload during assembly. However, during the working process of the engine rotor, the bolts will creep under the working conditions of preload and high temperature. Creep is a kind of irreversible plastic deformation. After a long time of creep, it will cause the degradation of preload force, which will have a serious impact on the perform...

AI Technical Summary

Problems solved by technology

The existing technology for measuring bolt creep is to use a large-scale creep testing machine for testing, but it is expensive and bulky, and can only be placed in a specific test environment and is not easy to carry

Unable to apply to personal tests, small institutions or enterprises with few applications of creep testing machines

At the same time, the existing technology cannot obtain the preload degradation data of bolts in real time

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