Variable clearance packing ring with guide for preventing...

F - Mech Eng,Light,Heat,Weapons – 01 – D

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F01D 11/08 (2006.01) F01D 11/02 (2006.01) F01D 25/24 (2006.01) F16J 15/44 (2006.01)

Patent

CA 2214679

A rotary machine has a stationary component with circumferential grooves and a rotatable component, as well as annular sealing segments movable toward and away from the rotating component. To prevent circumferential displacement of the lower side annular segments by gravity forces and enable the lowermost segment in the lower housing to be moved radially inwardly, the side segments of the lower housing are supported adjacent the casing midline in a manner preventing downward movement and enabling horizontal movement. Consequently, the gap between the lower ends of the side segments and the lower segment in the open position of the segments remains, enabling the lower segment to move radially inwardly upon closing the seals.

Une machine rotative a une composante stationnaire avec des rainures circonférentielles et une composante rotative, de même que des segments d'étanchéité annulaires qui peuvent s'avancer vers la composante rotative ou s'en éloigner. Pour empêcher le déplacement circonférentiel des segments annulaires du côté inférieur, sous l'effet de la gravité, et pour permettre au segment le plus bas du logement inférieur de se déplacer radialement vers l'intérieur, les segments latéraux du logement inférieur sont appuyés près de la ligne médiane du carter de manière à empêcher le déplacement vers le bas et à permettre le déplacement horizontal. Par conséquent, le jeu demeure entre les bords inférieurs des segments latéraux et le segment inférieur en position ouverte des segments restants, ce qui permet au segment inférieur de se déplacer radialement vers l'intérieur quand on ferme les segments d'étanchéité.

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