Packing and method for producing the same

F - Mech Eng,Light,Heat,Weapons – 16 – J

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26/176, 277/25

F16J 15/16 (2006.01) F16J 15/22 (2006.01)

Patent

CA 2037075

The packing according to the present invention is composed of a string-like body in which a tape-like packing material having at least one layer is folded in the thickness direction thereof in zigzags with mountain portions and valley portions alternately formed. According to the packing, the string-like body cut into a predetermined length according to the diameter of a shaft concerned may be wound on the outer peripheral surface of the shaft with the width or thickness direction of the string-like body directed in the radial direction of the shaft. Thus, the packing is versatile with respect to the shaft diameter. The packing itself produces no slip in the axial direction of a shaft concerned. This prevents the packing from protruding, thus eliminating the release of stress due to decrease in volume. The packing is used with the string-like body folded in the three-dimensional directions. Accordingly, the shaft-following properties of the packing at the time when the same is worn, are satisfactory and the decrease in sealing properties is restrained.

Cette invention concerne une garniture d'étanchéité à segments en chapelet formé par pliage d'un ruban mono ou multicouche dans le sens de l'épaisseur de manière à former des crêtes et des creux alternés. Selon l'invention, la garniture d'étanchéité à segments en chapelet coupée à une longueur prédéterminée fonction du diamètre de l'arbre à équiper peut être enroulée autour de celui-ci avec les plis dans le prolongement du rayon de l'arbre. Ainsi, la garniture s'adapte parfaitement au diamètre de l'arbre et ne subit aucun déplacement axial le long de celui-ci. Cette caractéristique empêche la garniture de dépasser et prévient le desserrage consécutif à une réduction de volume. La garniture à segments en chapelet se caractérise, en vertu de son mode de pliage, par une adaptabilité tridimensionnelle. Par conséquent, ses capacités de rattrapage d'usure sont satisfaisantes et la perte d'étanchéité à l'usure est réduite.

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