Abstract:
The aim of the invention is to design a compact and light-weight hydraulic accumulator arrangement (1) of a hydraulic brake, comprising a high-pressure storage chamber (3), a medium-pressure storage chamber (4), and an ambient-pressure storage chamber (5). Said aim is achieved by arranging the high-pressure storage chamber (3), the medium-pressure storage chamber (4), and the ambient-pressure storage chamber (5) in a common housing (2) which delimits the high-pressure storage chamber (3) along with a high-pressure piston (6) movably guided within the housing (2) while delimiting the medium-pressure storage chamber (4) along with a medium-pressure piston (7) movably guided within the housing (2), wherein a high-pressure spring located in the housing (2) rests on the high-pressure piston (6) outside the high-pressure storage chamber (3), and a medium-pressure spring (14) located in the housing (2) rests on the medium-pressure piston (7) outside the medium-pressure storage chamber (4).
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).
Abstract:
A piston accumulator (40) for damping two fluid systems is provided. The piston accumulator (40) comprises a cylinder (42), a first port (44) for a fluid system to be damped, which is disposed at one end of the cylinder (42), and a first piston (52), which is contained in a sealed manner and slidably in the cylinder (42). Furthermore, the piston accumulator (40) comprises a second port (46) for a second fluid system to be damped, which is disposed at the other end of the cylinder (42), and a second piston (54), which is contained in the cylinder (42) in a sealed manner and is slideable between the first piston (52) and the second port (46). A first damping volume (60), formed between the first (52) and the second piston (54), is or can be filled with fluid, preferably gas. The accumulator further comprises a third piston (68), which is contained in the cylinder (42) in a sealed manner and is slideable between the second piston (54) and the second port (46), wherein a second damping volume (70), formed between the second (54) and the third (68) piston, is or can be filled with fluid.
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:
Ein Pulsationsdämpfer, umfassend einen Grundkörper (1) mit einem Einlass (2) und einem Auslass (3), die durch einen kanal (4) miteinander strömungsverbunden sind, wobei der Kanal (4) Durchgänge (5) aufweist, welche den Kanal (4) mit einer Überlaufkammer (6) strömungsverbinden, und wobei die Übedaufkammer (6) durch eine zumindest teilweise flexible Membran (7) von einer Ausgleich kammer (8) abgetrennt ist, sowie ein Pulsationsdämpfer, umfassend einen Grundkörper (1), wobei der Grundkörper (1) eine Ausgleichkammer (8) umfasst, wobei ein Kolben (13) zumindest teilweise innerhalb der Ausgleichkammer (8) bewegbar ist und wobei der Kolben (13) auf der der Ausgleichkammer (8) abgewandten Seite mit Druck beaufschlagbar ist, sind im Hinblick auf die Aufgabe, Systeme derart auszugestalten und weiterzubilden, dass stets ein optimaler Betrieb bei einfachem konstruktivem Aufbau gewährleistet ist, dadurch gekennzeichnet, dass die Ausgleichkammer (8) als abgeschlossener Raum ohne Zuleitung ausgebildet ist. Ein Verfahren zur Herstellung von Pulsationsdämpfem und deren Verwendung in hydraulischen Versorgungssystemen von Kraftfahrzeugen sind dargestellt.
Abstract:
The invention relates to a hydraulic accumulator, particularly in the form of a suction stream stabilizer, having an accumulator housing (10) which is provided with two fluid connections (16) between which a deflection device (22) is arranged which has an adjoining housing part (26) which accommodates a separating element which separates the interior (18) of the accumulator housing (10) from an accumulator volume (30). Solutions for long-term and functionally reliable operation can be achieved on account of the separating element being formed from a piston (28) or a bellows (50).
Abstract:
2. Bei einem Druckspeicher mit einer innerhalb eines Speichergehäuses 1 längs verfahrbaren, aus Hauptkolben 17 und relativ zu diesem bewegbarem Hilfskolben 19 gebildeten Kolbenanordnung, die eine Fluidseite 25 des Speichers von seiner Gasseite 23 über eine Dichteinrichtung abdichtend trennt, welch letztere ein Trennmittel 43 mit Tiefenfiltrationseigenschaft, weitere Dichtelemente 47 sowie eine an die Innenwand des Speichergehäuses 1 angrenzende Kammer 35, 39 für ein strömungsfähiges Dichtmedium aufweist, das durch den Hilfskolben 19 vorspannbar ist, der für eine das Volumen der Kammer 35, 39 verkleinernde Relativbewegung mit dem Druck der Gasseite 23 und der Kraft eines Kraftspeichers 33 beaufschlagt ist, ist der Hilfskolben 19 vollständig integriert in einer zur Gasseite 23 offenen Führung 21 des Hauptkolbens 17 geführt, in welchem mittels des Hilfskolbens 19 ein Raum 35 einschließbar ist, der Teil der das strömungsfähige Dichtmedium aufnehmenden Kammer 35, 39 bildet.