Abstract:
Die Erfindung betrifft einen hydropneumatischen Druckspeicher (1) mit einem aus zumindest zwei miteinander verbindbaren Gehäuseschalen (3, 5) gebildeten Gehäuse, wobei zumindest der Endbereich der einen Gehäuseschale (5) zwischen ihrem freien Ende und einem Dichtelement eine trichterartig nach aussen erweiterte Führungsfläche für das Zusammenfahren der beiden Gehäuseschalen (3, 5) aufweist und wobei an zumindest einer Haltefläche zum Erzeugen einer auf den Randbereich (21) der Membran (13) wirkenden Spannkraft zumindest ein elastisches Dichtelement (41) vorgesehen ist. Hierdurch ergibt sich ein vereinfachter Zusammenbau mit verbesserter Dichtwirkung in den kritischen Verbindungsbereichen des Druckspeichers.
Abstract:
The invention relates to a method for producing a membrane reservoir with a metal case. The inventive method comprises the following steps; a) rotating a tubular piece around its longitudinal axis, b) preheating one end of the tubular piece for deformation through heat retraction by strain-hardening, c) strain-hardening the end of the tubular piece by applying at least one pressure tool, selectively heating the target area of said pressure tool to deformation temperature in order to form a floor at the end of the tubular piece with an opening at a collar, said collar being turned outwards, d) forming an inner circular groove in the central area of the tubular piece, e) introducing a membrane system, said membrane system being sustained in the circular groove by a corresponding clamping ring, and f) forming a second floor at the second end of the tubular piece according to steps b) and c).
Abstract:
When the diaphragm in a diaphragm accumulator tears, nitrogen may move into the fluid. If the diaphragm accumulator is used in a braking system, serious faults can occur. In the diaphragm accumulator (2) according to the invention, an intermediate chamber (20) is provided in the resilient partition wall (6). Said intermediate chamber (20) leads to a sensor (16) which can detect damage in the resilient partition wall (6) before nitrogen reaches the fluid. The diaphragm accumulator is provided particularly for hydraulic braking systems in motor vehicles.
Abstract:
The invention concerns a sphere, in particular pneumatic, comprising a rigid shell (1) and a deformable flexible membrane (2) fixed inside said shell to define two chambers whereof one at least, called pneumatic chamber (4), is destined to be filled with gas under pressure. The invention is characterised in that the sphere comprises an element (16a) whereof the mechanical properties suddenly change when the temperature reaches a predetermined value causing said element to clear a passage for the gas from the pneumatic chamber (4) through which the gas escapes, to reduce the pressure inside said pneumatic chamber. The invention is applicable to motor vehicle suspensions.
Abstract:
The invention relates to an accumulator (1) for supplying oil to servo devices. In hydraulic facilities operating with an accumulator (1), the pump often causes disturbing noise resulting from oil pressure pulsation. In order to reduce said pulsation, the inventive accumulator has two connecting openings, one for oil intake and the other for oil discharge. Upon oil inflow there occurs a substantial cross-sectional change resulting in damped pulsation. Besides, the accumulator (1) acts as an extensible hose, so that the damping effect is increased.
Abstract:
The invention relates to a hydropneumatic pressure reservoir device comprising a reservoir housing (10) with a membrane (12) therein, forming a moving separating element between a first chamber, in particular a gas chamber (14) and a second chamber, in particular a fluid chamber (16). In a fluid-free state of the fluid chamber (16) said membrane covers an inlet opening (18) in the reservoir housing (10) with a closing piece (20) and is fixed within the reservoir housing (10) at the free fixing edge (24) thereof, by means of a fixing device (26). A very flat construction of hydro-reservoir is achieved, which provides a reliable isolation of machine components by application of said hydro-reservoir, whereby the reservoir housing (10) has a flat support surface (36) running along the side thereof facing a fixing point (34) and a spring elastic support piece (40) runs between the support surface (36) and the fixing point (34), to produce the connection between reservoir housing (10) and fixing point (34).
Abstract:
An accumulator installed in the piping of equipment and temporarily accumulating a pressure in a pipe flow path or absorbing, by a pump, the pulsation of a fluid pressure generating in the piping, wherein a bladder (3) is formed in a laminated structure having, for example, a center elastic layer (321), gas shielding layers (322) on the outside thereof, external elastic layers (323) on the outside of the gas shielding layers and the center elastic layer (321), gas shielding layers (322), and external elastic layers (323) are formed of polyamide resin, and the gas shielding layers (322) are formed so that the bending elastic modulus thereof is higher than the bending elastic moduli of the center elastic layers (321) and external elastic layers (323), whereby the durability of the bladder (3) against a repeated bending and stretching operation in the low temperature environment of 0 DEG or below can be increased and the volume of cushion gas in a gas chamber can be effectively prevented from decreasing.
Abstract:
A hydraulic accumulator has a partition (12) arranged in a housing (10) that divides inside the housing (10) a liquid chamber (14) from a gas chamber (16) and that is retained by means of a retaining member (30) linked to a connecting member (32). In order to establish this connection, the retaining member (30) surrounds the connecting member (32) at least partially.