Pump system for delivering cryogenic liquids

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

Patent

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Details

F04B 15/08 (2006.01) F04B 9/02 (2006.01) F04B 9/06 (2006.01) F04B 23/02 (2006.01) F04B 53/12 (2006.01) F17C 5/02 (2006.01)

Patent

CA 2365953

The invention relates to a pump system for delivering cryogenic liquids. Said pump system can be used for refuelling motor vehicles with H2. The inventive system consists of a container for receiving the cryogenic liquid. At least one pump that is configured as reciprocating pump with a pull rod actuating system and a spring return system is arranged in said container. The pump cylinder (1) of the reciprocating pump is separated into two chambers (a and b) by means of the piston (14, 17). The two chambers (a and b) are allocated to the pressure side or the suction side. The cryogenic liquid in the container is first caught in the chamber (b) by means of the pressure stroke and by exerting pulling forces onto the pull rod (29). The liquid caught in the chamber (b) is subsequently pushed further into the chamber (a) without using pressure and by resetting the pull rod (29) by means of the return spring (23) into an original position. The liquid is delivered to a pressure housing and from there to the user via a gap (d) and in the following pressure stroke by exerting pulling forces onto the pull rod (29).

Système de pompe pour la distribution de liquides cryogéniques, qui est adapté par exemple pour remplir de H¿2? le réservoir de véhicules à moteur. Ledit système comporte une cuve, destinée à contenir le liquide cryogénique, dans laquelle est installée au moins une pompe sous forme de pompe à piston actionnée par une tige de traction et dotée d'un système de rappel à ressort. Le corps (1) de la pompe à piston est divisé à l'aide du piston (14, 17) en deux chambres (a, b) qui se trouvent respectivement du côté pression et du côté aspiration. L'application de forces de traction sur la tige de traction (29) entraîne l'accumulation du liquide cryogénique contenu dans la cuve d'abord dans la chambre (b) lors de la course de compression. Lors du rappel de la tige de traction (29) par le ressort de rappel (23) dans une position de départ, le liquide contenu dans la chambre (b) est alors transféré sans pression dans la chambre (a). Lors de la course de compression suivante, l'application de forces de traction sur la tige de traction (29) entraîne finalement le transfert du liquide par une fente (d) dans un boîtier pour liquide sous pression, le liquide étant ensuite livré à l'utilisateur depuis ledit boîtier.

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