Pressure transfer modules

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

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Details

F04F 1/02 (2006.01) F04B 9/115 (2006.01) F04B 43/073 (2006.01)

Patent

CA 2255885

The invention comprises an improved pressure transfer module having, in one embodiment, two double-diaphragm pumps (35, 37; 45, 47) each having its diaphragms connected to one another by a respective drive shaft (38, 48) for reciprocating motion. Spool valve assemblies (97, 98, 107, 108) are directly mounted to the connecting shafts of each pump and arranged to maintain the operation of the two diaphragms of the pumps 90 degrees out of phase in that each such assembly constitutes pressurized water control valves for the other pump. The two pumps are mounted so that a complete pumping cycle comprises four pumping strokes, one every 90 degrees. To insure reversal of motion of the shafts in proper phase, the invention includes either two, meshed square cams (64) and cam surfaces formed on respective shafts connecting the pumping surfaces, or a floating crankshaft (86) with each end pivoted in one of the connecting shafts.

L'invention comprend un module de transfert de pression amélioré présentant, dans un mode de réalisation, des pompes à doubles membranes (35, 37; 45, 47) dont les membranes de chacune sont reliées mutuellement par un axe d'entraînement respectif (38, 48) destiné à conférer un mouvement de va-et-vient. Des ensembles distributeur à tiroir cylindrique (97, 98, 107, 108) sont montés directement sur les arbres de raccordement de chaque pompe et agencés pour maintenir le fonctionnement des deux membranes des pompes déphasées de 90 ·C de sorte que chaque ensemble constitue des vannes de régulation d'eau sous pression destinées à l'autre pompe. Les deux pompes sont montées de manière qu'un cycle de pompage complet comprenne quatre courses de pompage, un tout les 90 ·C. Afin d'assurer une inversion du mouvement des axes dans une phase correcte, l'invention comprend soit deux cames carrées accouplées (64) et des surfaces de cames formées sur les axes respectifs reliant les surfaces de pompage, soit un arbre coudé flottant (86) dont chaque extrémité pivote dans un des axes de raccordement.

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