Gasket based on force-induced color change coating

A color-induced and electrochromic technology, applied in the field of gaskets based on mechanochromic coatings, can solve problems such as loss, pre-tightening force reduction, fatigue damage of connectors, etc., to achieve simple working principle, smart structure, and accident prevention Effect

Inactive Publication Date: 2018-07-06
CHENGDU AIRCRAFT DESIGN INST OF AVIATION IND CORP OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After loosening, the pre-tightening force will be reduced or even lost, so that the tightness of the connection cannot be guaranteed, resulting in premature fatigue failure of the connecting parts, and finally leading to failure

Method used

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  • Gasket based on force-induced color change coating
  • Gasket based on force-induced color change coating
  • Gasket based on force-induced color change coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail, please refer to Figure 1 to Figure 2 .

[0018] Such as figure 1 As shown, a gasket based on a mechanochromic coating, including a press gasket (1), an electrochromic coating (2), and a piezoelectric ceramic gasket (3); the surface of the piezoelectric ceramic gasket (3) is supplemented with an electric For the electrochromic coating (2), the pre-tightening force on the pressure washer (1) caused by the tightening of the bolts causes the piezoelectric material on the piezoelectric ceramic gasket (3) to generate a voltage, realizing the electrochromic coating (2) under the action of voltage. Colorize down to the specified color.

[0019] Bolt tightening is achieved by a color change, as the color disappears to indicate a loose or broken bolt.

[0020] Such as figure 2 As shown, the washer based on the mechanochromic coating changes color under preload...

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PUM

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Abstract

The invention relates to an intelligent lock gasket based on a force-induced color change coating. Safety and reliability of bolt connection are guaranteed. The intelligent lock gasket is composed ofthe force-induced color change coating and a lock gasket body. The force-induced color change coating is arranged at the top end of the gasket body. According to the intelligent lock gasket, safety and reliability of gasket connecting can be achieved, the structural weight is low, and demounting and mounting are convenient; and maintainability is good, and the accident caused by gasket loosening and breakage to key structure connection can be effectively avoided.

Description

technical field [0001] The invention relates to a washer based on a mechanochromic coating, which ensures the effectiveness of the bolted connection of key structures of the aircraft, especially the key structure of the bolted connection. Background technique [0002] Bolt connection is an essential and important connection of aircraft structure, which plays a vital role in the safety and efficiency of aviation structure. Bolted connections can loosen under variable loads, vibration and shock, and when operating temperatures vary widely. After loosening, the pre-tightening force will be reduced or even lost, so that the tightness of the connection cannot be guaranteed, resulting in premature fatigue failure of the connecting parts, and finally leading to failure. [0003] The smart washer is an active anti-loosening washer that can actively reflect whether the bolt is loose after tightening. The intelligent color-changing coating on the washer can respond to the stress chan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B43/00
CPCF16B43/00F16B2200/95
Inventor 马如飞周煜青龚海波赵志远
Owner CHENGDU AIRCRAFT DESIGN INST OF AVIATION IND CORP OF CHINA
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