Crown Reinforcement For Airplane Tire

摘要

Aeroplane tire (1) comprises a working reinforcement (2) radially between tread (3) and carcass reinforcement (4). Working reinforcement (2) includes a working biply (21) comprised of the zigzag circumferential winding of strip (5) of width W onto a cylindrical laying surface (6) of radius R, with its axis of revolution being axis of rotation (YY′) of the tire, in a periodic curve (7) with period P and forming angle A with circumferential direction (XX′) of the tire in equatorial plane (XZ) of the tire. The winding of strip (5) comprises N periods P of curve (7) over T circumferences 2ΠR of surface (6). N is a whole number which satisfies the following conditions:
(a) N*(W/sin A)=2ΠR,(b) N*P=2ΠR*T, where T is a whole number,(c) N*T is the lowest common multiple of N and T,

and the ratio T/N is at least equal to 1.8 and at most equal to 2.2.

主权项

1. A tire for an aeroplane, comprising:
a working reinforcement radially on the inside of a tread and radially on the outside of a carcass reinforcement; the working reinforcement comprising at least one working biply comprised of two radially superposed working layers; the at least one working biply comprised of a zigzag circumferential winding of a strip of width W onto a cylindrical laying surface of radius R, having as its axis of revolution the axis of rotation of the tire, in a periodic curve; the periodic curve having a period P and forming an angle A with the circumferential direction of the tire in the equatorial plane of the tire; the zigzag circumferential winding of the strip comprising N periods P of the periodic curve over a number T of circumferences 2ΠR of the cylindrical laying surface; the number N of periods P of the periodic curve is a whole number which satisfies the following conditions: (a) N*(W/sin A)=2ΠR, (b) N*P=2ΠR*T, where T is a whole number, (c) N*T is the lowest common multiple of N and T,and the ratio T/N between the whole number T of circumferences 2ΠR of the cylindrical laying surface and the whole number N of periods P of the periodic curve which are needed to make up the at least one working biply, is at least equal to 1.8 and at most equal to 2.2.