Abstract:
A number of variations may include a fluid accumulator comprising, a housing and at least one movable piston wherein the piston separates an interior of the housing into a first chamber constructed and arranged for containing a first fluid, and a second chamber constructed and arranged for containing a second fluid, and wherein the first chamber has an first fluid opening and a first fluid exhaust constructed and arranged to expel excess first fluid from the fluid accumulator and prevent first fluid from entering the second chamber.
Abstract:
Ein System zur Verbesserung der Energieeffizienz bei Hydrauliksystemen, mit einem Aktuator (49), der in einem Betriebszustand als Verbraucher hydraulischer Energie und in einem anderen Betriebszustand als Erzeuger hydraulischer Energie arbeitet, und mit einem Hydrospeicher (1), der beim einen Betriebszustand des Aktuators (49) von diesem zur Energiespeicherung aufladbar und beim anderen Betriebszustand für eine Energieabgabe an den Aktuator (49) entladbar ist, dadurch gekennzeichnet, dass mindestens ein Hydrospeicher in Form eines verstellbaren hydropneumatischen Kolbenspeichers (1) vorgesehen ist, in dem mehrere Druckräume (19, 21, 23, 25), die an unterschiedlich große Wirkflächen (11, 13, 15, 17) an der Fluidseite des Speicherkolbens (5) angrenzen, gebildet sind, und dass eine Stellanordnung (51) vorgesehen ist, die in Abhängigkeit von den jeweiligen auf der Gasseite des Kolbenspeichers (1) und am Aktuator (49) herrschenden Druckniveaus einen ausgewählten Druckraum (19, 21, 23, 25) oder mehrere ausgewählte Druckräume (19, 21, 23, 25) des Kolbenspeichers (1) mit dem Aktuator (49) verbindet.
Abstract:
The invention relates to a device for damping discharge pulsations in a medium being pumped through a system of pipes in a pulsating manner by a displacement pump that operates with a specific discharge characteristic, which device at least comprises a housing with an at least partially gas-filled damping chamber having a certain volume present therein, which housing can be connected to the system of pipes, in such a manner that an interface layer is present between the medium and the gas in the damping chamber during operation, which damping chamber has a desired gas pressure characteristic that partially depends on the discharge characteristic of the displacement pump, wherein the gas volume that is present in the damping chamber varies in time between a minimum compression volume and a maximum expansion volume under the influence of said discharge pulsations during operation, as well as adjusting means that supply gas to or discharge gas from the damping chamber. The present invention provides a simpler and less complicated construction both for pulsation dampers provided with a separating element and for air boxes not provided with a separating element. In order to achieve an optimised damping of the discharge pulsations, the adjusting means are according to the invention arranged for determining the desired gas pressure characteristic in the damping chamber on the basis of the discharge characteristic of the displacement pump and determining the current gas pressure characteristic in the damping chamber, and comparing the current gas pressure characteristic as determined with the desired gas pressure characteristic of the damping chamber and determining the current position of the interface layer in the damping chamber on the basis of said comparison.
Abstract:
The invention relates to a flow element for a hydraulic system which comprises a master cylinder and a slave cylinder and a pressure line interconnecting the same. The flow element comprises a pressure relief valve and a damping filter in a common housing.
Abstract:
An attenuator (7) for damping pressure fluctuations in a hydraulic system, which attenuator comprises a body (8) with a chamber (9), in which a movable piston (10) loaded by a spring (11) is adapted, a fluid space (17) inside the chamber (9), which space is delimited by the piston surface (19) of the piston (10), an inlet conduit (13) for feeding hydraulic fluid into the fluid space (17) and an outlet conduit (15) for discharging hydraulic fluid from the fluid space (17). The flow resistance in the inlet conduit (13) is higher than the flow resistance in the outlet conduit (15).