F - Mech Eng,Light,Heat,Weapons – 15 – B
Patent
F - Mech Eng,Light,Heat,Weapons
15
B
F15B 13/042 (2006.01) F15B 11/05 (2006.01) F15B 11/16 (2006.01) F15B 13/08 (2006.01) F16K 15/18 (2006.01)
Patent
CA 2250674
An improved pressure-compensated hydraulic system for feeding hydraulic fluid from a variable displacement pump to multiple hydraulic actuators. A separate valve section controls the fluid flow between the pump and a different actuator. Each valve section has a pressure compensating valve with a valve member and poppet within a bore and biased apart by a spring. The poppet acts as a check valve which prevents fluid flow from the actuator through the valve section to the pump when the back pressure from the load exceeds the pump supply pressure. A pressure differential between the load-dependent pressure and the actuator pressure determines a position of the valve member which controls the pressure applied to the pump pressure control input.
Système hydraulique amélioré à compensation de pression pour acheminer un liquide hydraulique d'une pompe à cylindrée variable à des actionneurs hydrauliques multiples. Une section soupape distincte commande l'écoulement de liquide entre la pompe et un actionneur différent. Chaque section soupape a une soupape à compensation de pression avec un obturateur et un clapet dans un alésage et écartés l'un de l'autre par l'action d'un ressort. Le clapet agit comme clapet de non-retour qui empêche l'écoulement du liquide de l'actionneur à la pompe en passant par la section soupape quand la contre-pression exercée par la charge excède la pression d'alimentation de la pompe. La différence entre la pression dépendant de la charge et la pression de l'actionneur détermine la position de l'obturateur qui commande la pression appliquée à l'entrée de commande de pression de la pompe.
Husco International Inc.
Smart & Biggar
LandOfFree
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