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A real-time detection device for bolt preload degradation process considering high temperature creep

A technology for bolt pre-tightening and real-time detection, which is used in measuring devices, using stable tension/pressure to test material strength, and testing of mechanical parts, etc. Obtaining bolt pretightening force degradation data, high price and other problems, to achieve the effect of low construction cost, easy maintenance and replacement, and convenient portability

Active Publication Date: 2017-12-05
电科北方数字科技(山东)有限公司
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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

Method used

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  • A real-time detection device for bolt preload degradation process considering high temperature creep
  • A real-time detection device for bolt preload degradation process considering high temperature creep
  • A real-time detection device for bolt preload degradation process considering high temperature creep

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Embodiment Construction

[0029] The following are specific examples of the present invention, and the technical solutions of the present invention are further described with reference to the accompanying drawings, but the present invention is not limited to the following examples.

[0030] In the high-temperature working environment of the engine rotor bolt, the pre-tightening force is degraded due to high-temperature creep. The maximum working temperature is 500 °C, and the initial pre-tightening force is set to 15kN. Now simulate the actual working temperature, detect the degradation process of the preload force in real time, and obtain the preload force degradation curve.

[0031] The technical solution adopted in the present invention is a real-time detection device for the degradation process of bolt pretightening force considering high temperature creep, such as figure 1 shown. The device includes three system units, namely, a pre-tightening force acquisition system A, a bolt clamping connectio...

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Abstract

A real-time detection device for the degradation process of bolt preload force considering high temperature creep, the detection device includes a preload force acquisition system (A), a bolt clamping connection device system (B) and a heating system (C), and the three are connected to each other . The detection device has a low construction cost, is small in size, is easy to carry, and is convenient for simulating high-temperature creep in a real environment. The invention can provide a high-temperature environment, accurately simulate the creep process of the bolt during use, and simultaneously collect the value of the pretightening force in real time and feed it back to the computer. It has good application prospects in the field of engineering material testing instruments and equipment technology.

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] Bolted connection is the most widely used assembly method on mechanical products. In aero-engines, some important bolted connections have a decisive impact on the reliability of engine work. 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 bolt will creep under the working state of pre-tightening force and high temperature. Creep is an irreversible plastic deformation. After a long time of creep, the preload force will be degraded, which will have a serious impact on the performance of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/00G01L5/24G01N3/18
Inventor 戴伟卢志远赵宇
Owner 电科北方数字科技(山东)有限公司
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