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A leak-proof fastening device and assembly method

A fastening device, leak-proof technology, applied in the field of aeronautics, can solve the problems of increasing the time and cost of installing fasteners, difficult tasks, etc.

Inactive Publication Date: 2018-04-10
LISI AEROSPACE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, applying sealer to the hole is a difficult task which increases the time and cost of installing the fastener

Method used

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  • A leak-proof fastening device and assembly method
  • A leak-proof fastening device and assembly method
  • A leak-proof fastening device and assembly method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0088] Figure 1A A cross-sectional view of an assembly according to one embodiment of the invention is shown. The assembly 10 comprises a washer 11 assembled to a fastening nut 12 .

[0089] The gasket 11 comprises an annular base 15 and a surrounding substantially cylindrical skirt 13 arranged along an axis 14 on the outer periphery of the annular base 15 .

[0090] The skirt 13 and the annular base 15 form a cavity in which the collar 16 of the fastening nut 12 is accommodated. The collar 16 has a substantially cylindrical shape surrounding the axis 14 . The collar 16 extends axially through a substantially frustoconical portion 17 , the diameter of which decreases the farther it is from the collar 16 along the axis 14 .

[0091] The annular base 15 has a circular aperture 18 arranged along the axis 14 . Likewise, the fastening nut 12 passes axially through the threaded hole 19 . At the collar 16 a threaded bore 19 is axially extended by a counterbore 20 having a larger...

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PUM

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Abstract

The assembly (10) has a washer (11) assembled on a female fastener that is designed as a fastening nut (12) or a collar. The washer comprises a cylindrical skirt (13) rigidly connected to an outer periphery of an annular base (15). The base is partially covered with a layer (21) of a viscous composition utilized for forming a liquid-tight seal through polymerization. The fastener is assembled onto the washer by adhering to the layer of the composition that comprises liquid polysulfide and reagent capable of releasing oxygen i.e. manganese dioxide. The viscous composition comprises liquid polysulfide and reagent capable of releasing oxygen i.e. manganese dioxide. An independent claim is also included for a method for assembling a leak-proof assembly for a fastening system.

Description

technical field [0001] The present invention relates to a bolt / nut type fastening device. More particularly, the present invention relates to a leak-proof fastening device. The invention is particularly applicable in the field of aeronautics. Background technique [0002] The use of pin / nut or lockbolt / collar fastenings is very common in the aerospace industry, especially for joining two structural components together. Such attachments are generally required to be impermeable to prevent liquid or gas leakage, such as in fuel tanks, or to avoid the presence of moisture, which can cause corrosion of the assembled components. [0003] To achieve this leak-tightness, a known solution is to apply a sealant between the male fastener (bolt or bolt) and the hole in which it is held. After installation of the appropriate female fastening device (nut or collar), the sealant hardens due to polymerization of its components, which ensures that the fastener / structural assembly is leak-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16B43/00F16B37/00F16J15/14F16B5/02F16B5/10
CPCF16B19/05F16B43/001F16B11/004F16B29/00F16B39/225B29C65/485B29C65/561B29C65/562
Inventor 佛罗伦特·菲迪尔班诺特·雷格娜德
Owner LISI AEROSPACE
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