F - Mech Eng,Light,Heat,Weapons – 16 – J
Patent
F - Mech Eng,Light,Heat,Weapons
16
J
F16J 15/18 (2006.01) F16K 41/02 (2006.01)
Patent
CA 2141189
The invention relates to a process and to a device for the controlled prestressing of a stuffing box (12, 20, 22). According to the invention this is carried out by means wherein the stuffing-box packing (20) is acted upon for the first compression with a given maximal pressure force, the pressure force (F) is then varied a number of times between the maximal pressure force and a given minimal pressure force, and the packing finally is compressed under a given nominal pressure force and in this state, is restrained in the chamber (12). During the variation of the pressure force (F), the corresponding spanning path (s) of the packing (2) is measured and registered to form a force-path diagram for use as a calibrating curve. The nominal pressure force can then be set with the aid of the calibrating curve by compression of the packing measurement of the spanning path.
L'invention concerne un procédé et un dispositif permettant de comprimer de manière contrôlée un presse-étoupe (12, 20, 22). Afin d'opérer une compression initiale, on applique une force de compression maximale prédéfinie à la garniture de presse-étoupe (20). On fait ensuite varier la force de pression (F) à plusieurs reprises entre la force de pression maximale et une force de pression minimale prédéfinie. La garniture est finalement comprimée à une force de pression nominale prédéfinie et est enfoncée et bloquée, dans cet état, dans la chambre (12). Pendant la variation de la force de pression (F), l'allongement (s) de la garniture (20) qui en résulte est mesuré et enregistré sous forme de diagramme force exercée-allongement produit, servant de courbe d'étalonnage. La force de pression nominale peut ensuite être ajustée afin d'obtenir l'allongement approprié, par compression de la garniture, à partir de la courbe d'étalonnage obtenue par mesure de l'allongement.
Amtec Advanced Measurement Messtechnischer Service Gmbh
Kirby Eades Gale Baker
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