A multi stage, clam shell vacuum pump

F - Mech Eng,Light,Heat,Weapons – 04 – C

Patent

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Details

F04C 27/02 (2006.01) F04C 18/12 (2006.01) F04C 23/00 (2006.01)

Patent

CA 2698452

A multi-stage, clam shell, vacuum pump is provided. The vacuum pump comprises two housing components which are to be sealingly connected to one another such that an array of chambers is defined thereby. The array of chambers extends longitudinally from an inlet region of the pump to an outlet region of the pump. Sealing means are provided within the vacuum pump, between the two housing components, to prevent transfer of fluid in to and out of the vacuum pump where said components are connected. An array of discrete, elongate channels is provided, located between the sealing means and the array of chambers. The channels serve to protect the sealing means from fluid that passes through the chambers during operation of the vacuum pump. Each channel is configured to receive a barrier fluid having a different pressure than a barrier fluid to be received by an adjacent channel.

L'invention concerne une pompe à vide à étages multiples et à carter en deux parties, qui comprend deux éléments de carter devant être reliés de manière étanche l'un à l'autre de telle sorte qu'une rangée de compartiments soit ainsi définie. La rangée de compartiments s'étend longitudinalement d'une région d'entrée de la pompe jusqu'à une région de sortie de la pompe. Des moyens d'étanchéité situés à l'intérieur de la pompe à vide, entre les deux éléments de carter, servent à empêcher tout transfert de fluide dans la pompe à vide et hors de celle-ci au niveau de la liaison entre lesdits éléments. Une rangée de canaux séparés allongés est située entre les moyens d'étanchéité et la rangée de compartiments. Les canaux servent à protéger les moyens d'étanchéité du fluide qui traverse les compartiments pendant le fonctionnement de la pompe à vide. Chaque canal est configuré pour recevoir un fluide formant barrière présentant une pression différente d'un fluide formant barrière devant être reçu par un canal adjacent.

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