High-pressure small volume pump

Details High-pressure small volume pump High-pressure small volume pump

F - Mech Eng,Light,Heat,Weapons

04

B

F04B 53/16 (2006.01) F04B 11/00 (2006.01) F04B 53/14 (2006.01)

Patent

CA 2485552

An improved high-pressure pump (1) for an accurate, largely pulsation-free flow of the working medium, more particularly an HPLC pump, includes one or a plurality of the following measures: reduced dead space due to adapted seals (48, 70); reduced dead space thanks to a device (15, 16; 32; 36, 38) for adjusting the length of the displacement piston; adjustable dead space and therefore adjusting capability of the pulsation freedom through a displacement chamber provided with an adjustable opposed piston (58); and seals compensating construction tolerances by a combination of a cambered sealing surface and a conical sealing surface.

L'invention concerne une pompe haute pression améliorée (1) destinée à l'écoulement précis, en grande partie sans pulsation du milieu actif, plus particulièrement une pompe à chromatographie liquide à haute performance (CLHP). Cette pompe comprend une ou plusieurs des mesures suivantes: - un volume mort réduit grâce aux joints (48, 70); - un volume mort réduit grâce au dispositif (15, 16; 32; 36, 38) permettant d'ajuster la longueur du piston de déplacement; - un volume mort ajustable et par là même une capacité d'ajustage de la liberté de pulsation à travers la chambre de déplacement munie d'un piston opposé ajustable (58); et des joints permettant de compenser les tolérances de construction par combinaison d'une surface de scellement arquée et une surface de scellement conique.

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