Method for preventing large hierarchical aircraft tire cord fabric backward-packed ends from being disengaged

Abstract

The invention discloses a method capable of effectively preventing large hierarchical aircraft tire cord fabric backward-packed ends from being disengaged. Backward-packed cord fabric layers and forward-packed cord fabric cord fabric layers are included. The method is characterized in that ends at two sides of the backward-packed cord fabric layers are respectively provided with more than 6 cord fabric end sealing adhesive sheets of 0.5mm thickness and 35-50mm width; and forward-packed cord drum ends are positioned at the bead base, and sealing adhesive sheets are not plastered. The invention has advantages as follows: cord fabric end sealing adhesive sheets can make each cord fabric back-packed ends to be separated from carcass cord threads at corresponding positions; generation of heat by friction between carcass cord fabric ends and carcass cord threads under stress state of a tire is prevented; partial friction stress and energy are absorbed; and cord threads and cord thread ends are effectively prevented from being damaged. Meanwhile, by the binding effect of the sealing adhesive sheets, each cord fabric back-packed ends can be firmly adhered to a carcass. It is ensured that relative motion and displacement are avoided and the ends are not easy to disengage at high temperature. The cord fabric layers are effectively prevented from delaminating and swelling, and carcass strength and loading capacity of a tire are guaranteed.

Description

technical field [0001] The invention relates to aviation tires, in particular to a method for preventing the ply ends of large-level aviation tires from coming off. Background technique [0002] With the continuous development of the aviation industry, the technical requirements of aircraft for the supporting aviation tires are constantly increasing, which is reflected in the continuous increase of the load, speed and air pressure on the tires, and the requirements for the tires are becoming more and more stringent. The carcass plies of large-scale aviation tires have many layers, generally up to 12 or more layers, and they run at high speed under the action of large loads for a long time, and the temperature between the plies rises sharply due to the shear force. The carcass is thick and difficult to dissipate heat. The turned-up ends of the multi-layer plies are easy to come off due to the decrease of the bonding strength at high temperature, resulting in delamination and ...

AI Technical Summary

Problems solved by technology

The carcass plies of large-scale aviation tires have many layers, generally up to 12 or more layers, and they run at high speed under the action of large loads for a long time, and the temperature between the plies rises sharply due to the shear force. The carcass is thick and heat dissipation is difficult. The turned-up end of the multi-layer ply is very easy to come off due to the decrease of the bonding strength at high temperature, causing the carcass to delaminate and bulge, and serious tire blowouts may occur, posing safety hazards

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