A high temperature resistant sealed blind rivet

By designing high-temperature resistant sealed blind rivets and utilizing the fit between the cone and the ring as well as the deformation characteristics of the memory alloy ring, the problems of insufficient sealing and strength of existing rivets in high-temperature environments are solved, and high sealing and high clamping force are achieved, making them suitable for high-end assembly fields such as aerospace.

CN119778362BActive Publication Date: 2025-09-23AEROSPACE PRECISION PROD INC LTD
View PDF 2 Cites 0 Cited by

Patent Information

Application Number
CN202510111422.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-01-23
Publication Date
2025-09-23
Estimated Expiration
2045-01-23

AI Technical Summary

Technical Problem

Existing blind rivets are difficult to meet the requirements of high strength and high sealing in high-temperature environments, especially in the high-temperature working areas of aerospace. The existing rivets have low preload force and poor sealing, and cannot meet the use requirements of high-temperature working conditions such as the outer surface skin of hypersonic aircraft and engine tail nozzles.

Method used

A high-temperature resistant sealed blind rivet was designed, which includes a core rod, a locking sealing nut, a rivet sleeve, a locking ring and a push bushing. Through the cooperation of the cone and the ring, the deformation characteristics of the memory alloy ring are utilized to provide high sealing and clamping force at high temperatures. Combined with the use of high-temperature alloy materials, it ensures stable operation in high-temperature environments.

Benefits of technology

It achieves high sealing and high clamping force in high temperature environment, is applicable to a wider range of interlayers, and is suitable for complex connections and extreme working environments in high-end assembly fields such as aerospace.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN119778362B_ABST
    Figure CN119778362B_ABST
Patent Text Reader

Abstract

The present application provides a high-temperature resistant sealed core-pulling rivet, comprising a core rod, a locking sealing nut, a rivet sleeve, a locking ring and a push bushing; one end of the core rod is installed in the rivet gun chuck, and the other end of the core rod is provided with a blocking step; the rivet sleeve is sleeved on the core rod, and a local annealing zone is provided in the middle of the rivet sleeve. A matching cone and an annulus are installed between the rivet sleeve and the core rod, and the end of the annulus abuts against the blocking step. The rivet sleeve is roll-formed and assembled with the core rod, and the locking sealing nut is provided on the rivet sleeve; the other end of the rivet sleeve is provided with a locking cone hole, and the locking cone hole cooperates with the locking groove provided on the core rod to form a wedge-shaped space, the locking ring and the push bushing are sleeved on the core rod, and the locking ring is installed in the push bushing, and the push bushing breaks to squeeze and deform the locking ring into the wedge-shaped space. The present application has the characteristics of high temperature resistance, high sealing performance, wider applicable interlayer range, and greater clamping force, and effectively solves the shortcomings of existing rivets in high sealing requirements, high temperature environments and high strength applications.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Sealing plug with closed end

    CN101542138A

  • Blind fastener and nose assembly for installation thereof

    CN101668956A