RU2420412C2 - Method of increasing reliability of air tire and device to this end - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: invention relates to aircraft engineering and automotive industry. Proposed method and device uses mechanical sealing to eliminate tire puncture by automatic pressing of sealant to tire inner surface originated in tire puncture and pressure drop thanks to extra smaller-diametre inner tube in rubber tubeless tire. Said inner tube is provided with sealing envelope with corrugated surface along its radius to compensate for tube size in working position in tire puncture. Said envelope is made from elastic porous material, for example, silicon, or latex, or foamed rubber, or foamed polyethylene. Said envelope is designed to provide, at normal tire inner pressure, a clearance, and pressing said envelope at pressure drop to tire inner surface at tube inner pressure. Said envelope is provided with protective layer from Kevlar or Teflon to protect inner tube from sharp articles.

EFFECT: tire serviceability after puncture at reduced operating pressure.

2 cl, 1 dwg

Description

The invention relates to the field of automotive and aircraft manufacturing.

The prior art device pneumatic tire, given in the publication:

The device and operation of vehicles.

Authors V.L. Rogovtsev A.G. Puzankov V.D. Olfild.

M .: Transport, 1989, p. 262-265.

A prototype of the invention is a tubeless pneumatic tire device.

In order to prevent the consequences of a puncture of a tire, a method of sealing punctures using chemical sealing means is used.

The disadvantage of this method is the inability to seal punctures more than a certain size instruction.

The main disadvantage of the prototype of the claimed device is the loss of vehicle performance during a puncture or rupture of a tire tire at high speed.

The aim of the invention is to extend the performance of the tire during punctures with a minimum decrease in operating pressure.

To achieve this goal, a two-volume pneumatic tire device circuit was used. Option 1.

In the 2nd embodiment, the sealing shell is adhered to the inner cavity of the tire tire.

In option 3, it is proposed to use a sealing element in the form of a donut. The technical result of the claimed invention is provided by the use of a 2-volume scheme of a pneumatic tire, where the first volume is the main worker, and the second backup worker.

The novelty of the invention of the method lies in the automatic sealing of the puncture site without significant changes in motion parameters.

The novelty of the invention of the device lies in the use of the known device for another purpose. That is, in all known devices, the camera was used as the main element of air retention in the tire, and in the claimed invention it performs the function of a method for sealing punctures and small tire breaks in tubeless tires.

The principle of the device of the invention. Option 1.

The drawing shows the main elements of the device.

1 - Wheel rim.

2 - Tire tire.

3 - The hole for the valve tubeless part of the tire.

4 - The hole for the camera valve.

5 - Camera valve.

6 - Valve tubeless type.

7 - Camera.

8 - Sealing sheath.

9 - Tubeless cavity

10 - The cavity of the camera.

The principle of operation on the example of a tubeless tire of a car. In the wheel disk 1 of a standard tubeless tire 2 having an opening for mounting the valve 3, an opening for the valve of the chamber 4 is made, the valve of the chamber 5 has a sealing flange similar to the valve of the tubeless tire 6 (not shown). On the rubber chamber 7, made in such a way that, when inflated, a gap is ensured between the inner cavity 9 of the tire 2 tire and the interference between the chamber 7 and the wheel disk 1, with the expectation of installing a sealing shell 8 on the chamber 7 with a corrugated part of the surface over a larger radius of the shell to compensate for the size of the chamber in its working position when punctured the working part of the tire (not shown).

The sealing shell is made on the basis of foam elastic material, such as rubber, latex, silicone, polyethylene, and other materials with similar properties.

The shell can be of various shapes, continuous, completely covering the camera, split, with a slit for dressing on the camera, glued to the camera in full or in several places, the shell can have different thicknesses with thickening in places closer to the tread and reduction in other places less exposed punctures and tears.

Also, the shell may have a protective layer on the camera side made of a material similar to, for example, Kevlar, Teflon, etc., to protect the camera from long sharp objects stuck in the tread.

Equipped with such a shell 8, the chamber 7 is installed in the tubeless cavity 9 of the tire 2 with the outlet of the valve of the chamber 5 through the hole 4.

To bring the claimed device into working condition, air is supplied gradually into each of the cavities.

In order for the camera and the shell to acquire a shape that allows them to be in a fully reserve state, eliminating contact with the tire, and to simultaneously prevent their sagging, the pressure in the cavity of the chamber 10 should be slightly higher than in the tubeless cavity 9.

Thus, while observing the geometry of manufacturing the elements of the invention and maintaining the corresponding pressure in both cavities of the miracle tire (more precisely, in the standard, tubeless cavity of the tire 9, which, in turn, does not go beyond the daily procedure of preparing the car for movement), a camera with the sealing shell will be in a reserve state, practically without any wear. Upon the occurrence of an insured event, a puncture of the tire, the pressure in the tubeless part 9 will decrease, and the chamber 7 will begin to increase in volume due to the pressure difference, while the sheath 8 will be pressed against the puncture, preventing air from leaving the tubeless part 9. To repair the tire without removing it from the disk it is enough to release air from the cavity of the chamber 10 and repair using a special tool in accordance with the instructions attached to it.

Option 2 provides for gluing the inner cavity of the tireless tube tire with a sealing elastic material based on rubber, latex, silicone, foamed rubber and other materials suitable for sealing.

When the wheel is punctured, the outgoing air will tend to push the elastic layer out, thereby sealing the hole in the tire.

Option 3 provides for the installation of a tubeless tire in the tire cavity, an elastic element consisting of a plurality of gas bubbles isolated from each other, with material properties similar to the previous options. The sealing element is made in the form of the inner cavity of the tire, in the form of a donut somewhat larger than the cavity itself. The element is installed and the wheel is assembled in a pressure chamber at elevated pressure. After inflating the tire with working pressure, gas bubbles, having compressed, will reduce the volume of the bagel and will not participate in the tire. When a tire is punctured, sealing will occur under the influence of a pressure difference and an increase in the volume of the sealing element.

In all embodiments of the claimed device, an inert gas, such as helium, nitrogen, and others, can serve as a working fluid.

Claims (2)

1. A method of increasing the reliability of a pneumatic tire, characterized in that as a means of sealing a puncture, a method of mechanical sealing is applied by automatically pressing the sealing material to the inside of the tire, resulting from a puncture and a corresponding pressure drop in the tire, by additionally placed in a tubeless tire a smaller rubber chamber than a tire cover with a sealing shell placed on said chamber with a corrugated part of surfaces along the greater radius of the shell to compensate for the size of the chamber in its working position when punctured the working part of the tire made of elastic porous material, such as silicone or latex, or foamed rubber, or foamed polyethylene, and the shell is made so that at normal operating pressure a gap was ensured in the tire’s tire cavity, and when the pressure in the indicated cavity dropped, the shell pressed against the inside of the tire under pressure in the chamber, and the shell on the side of The measure is equipped with a protective layer of Kevlar or Teflon to protect the camera from sharp objects. 2. A device for improving the reliability of a pneumatic tire, comprising a rim with a hole for a tubeless valve, a tire cover, and a hole for a chamber valve, a rubber chamber smaller than the tire cover, with a sealing shell located on said chamber, is additionally made in the wheel disk with a corrugated part of the surface over a larger radius of the shell to compensate for the size of the chamber in its working position when puncturing the working part of the tire made of elastic porous material, e.g. measures silicone or latex, or foamed rubber, or foamed polyethylene, the shell being made in such a way that under normal operating pressure in the tire tire cavity, a gap is ensured, and when the pressure in the cavity drops, the shell is pressed against the inner side of the tire under pressure in the chamber moreover, the shell on the side of the camera is equipped with a protective layer of Kevlar or Teflon to protect the camera from sharp objects.