Crown reinforcement for aircraft tyre
A crown reinforcement and aircraft tire technology, applied in the field of aircraft tires, can solve the problems of overheating of polymer coating materials, poor thermal conductors, and unfavorable mechanical integrity, so as to increase circumferential ductility, uniform temperature, and reduce tension. The effect of broken risk
Active Publication Date: 2013-03-20
MICHELIN & CO CIE GEN DES ESTAB MICHELIN
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AI Technical Summary
Problems solved by technology
However, polymer coating materials are poor thermal conductors due to their low thermal conductivity
Likewise, fabric reinforcement elements do not effectively contribute to heat removal due to their low thermal conductivity
This causes the polymer coating material to overheat, which is detrimental to its proper mechanical integrity and potentially breaks it down, causing premature tire failure
Method used
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Embodiment Construction
[0064] figure 1 A meridian cross-section, ie a cross-section in a meridian plane, of the crown of a tire according to the invention is shown. It depicts the crown intended to come into contact with the ground through the tread 1, the radial carcass reinforcement 2, the crown reinforcement radially inside the tread and radially outside the radial carcass reinforcement, Said crown reinforcement comprises a working reinforcement 3 and a protective reinforcement 4 . The working reinforcements 3 made of overlapping working reinforcement layers are not all shown: only one working reinforcement layer 30 has been shown in order to make the invention easier to understand. The layer of working reinforcements is made of substantially circumferential belts 31 juxtaposed axially. Each belt is made of mutually parallel textile reinforcement elements 32 coated with a polymeric coating material 33 . Each belt is in contact with the heat transfer element 34 on its radially inner axial face...
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The invention relates to the improvement of the removal of heat generated in the working reinforcement of an aircraft tyre, from the hottest points, which are generally located at the ends of the working reinforcing layers, to the least hot points, which are generally located in the central region of the working reinforcement, so as to obtain a more even distribution of temperatures in the crown of the tyre. An aircraft tyre comprises a crown reinforced by a working reinforcement (3), comprising at least one working reinforcing layer (30) made up of strips (31) that run circumferentially overall, are axially juxtaposed, and made up of mutually parallel textile reinforcing elements (32) coated in a polymeric coating material (33). According to the invention, each strip is in contact, over at least its radially inner axial face, with a heat transfer element (34) comprising at least one heat conducting material, the thermal conductivity of a heat conducting material of a heat transfer element is at least equal to fifty times the thermal conductivity of the polymeric coating material with which the textile reinforcing elements of the strip in contact with the heat transfer element are coated and the product of the thickness of a heat transfer element times the extension modulus of a heat transfer element is at most equal to 0.3 times the product of the thickness of the strip times the extension modulus of the strip.
Description
technical field [0001] The present invention relates to aircraft tires and, more particularly, to crown reinforcements for aircraft tires comprising a layer of textile reinforcing elements. Background technique [0002] Since the geometry of the tire exhibits rotational symmetry about the axis of rotation, the geometry of the tire can be described as a meridian plane that includes the axis of rotation of the tire. For a given meridian plane, radial, axial and circumferential directions denote directions perpendicular to the axis of rotation of the tire, parallel to the axis of rotation of the tire and perpendicular to the meridian plane, respectively. Hereinafter, the expressions "radially inner" and "radially outer" mean "closer in the radial direction to the rotation axis of the tire" and "farther in the radial direction from the rotation axis of the tire", respectively. The expressions "axially on the inside" and "axially on the outside" mean "in the axial direction clos...
Claims
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IPC IPC(8): B60C9/18B60C9/22B60C19/00B60C23/19
CPCB60C2200/02B60C23/19B60C9/18B60C9/1807B60C9/22Y10T428/24132Y10T152/10765
Inventor V·埃斯唐纳L·比谢
Owner MICHELIN & CO CIE GEN DES ESTAB MICHELIN