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:
An improved hydraulic accumulator is introduced wherein a valve mechanism (3) is used to seal a hydraulic fluid before the pressure charged piston (1) reaches the end of the accumulator to minimize the loss of compressed gas by eliminating the pressure differential when the piston (1) is fully extended, thereby prolonging the fatigue life of the accumulator vessel. Reduction of the pressure loading on the vessel will also prolong the life of the piston seals and metal bellows (8) effectively extending the accumulator life and effectively allowing design for weight reduction and preservation of the integrity of the complete hydraulic or pneumatic system.
Abstract:
An ultra-sound testing device for gas pressure accumulators is used to test a predeterminable set position that can be taken by a movable separating element (20) inside an accumulator (10) that can be filled with gas and connected to a fluid circuit. The separating element (20) has at least one testing body associated with a visible mark (34) which indicates the set position of the separating element (20), and on the basis of which an ultra-sound testing device provided for the respective testing body can be set on the accumulator (10). This testing device allows a plurality of accumulators of the same type to be tested for their predeterminable gas pressure set value, which corresponds to the gas pre-filling pressure, by means of a single hand apparatus. This kind of test is economical and achieves reliable results.
Abstract:
The invention relates to a hydro-store with a storage casing (10) in which two partial chambers for media to be separated from each other are formed by a separating diaphragm. Because there is at least one other separating diaphragm (22, 24) in the storage casing (10) arranged in such a way that the number of partial chambers (30, 32, 34) formed is at least one greater than that of the separating diaphragms (22, 24) and/or these partial chambers (30, 32, 34) are formed by at least one storage bubble which is sealed to the storage casing (10) along its outer periphery, the hydro-store has a wider field of application than prior-art types. It is in particular possible with the multi-chamber hydro-store of the invention to store energy more favourably for the same size than in a conventional store with only one separating diaphragm.
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.
Abstract:
The reservoir (10) has a cylinder (11) and a separating piston (13) arranged to slide therein. The piston separates a pressure medium storage chamber (15) from a gas chamber (14) in the cylinder (11). The separating piston (13) is sealed against the cylinder (11) by at least two rings (20 and 21) arranged at a distance apart axially on the periphery of the piston. Between the piston rings (20 and 21) is a collection chamber (22) from which opens a drilling (23) in the piston (13). The drilling (23) opens into the gas chamber (14) and can be closed off by a return valve blocking the passage from the gas chamber into the collection chamber (22). When the storage chamber (15) is emptied, pressurised gas and liquid conveyed with it from the gas chamber (14) into the collection chamber (22) are fed back into the gas chamber (14) via the drilling (23) on the opening of the return valve (27) as a result of being allowed to pass through the piston ring (20) on the gas chamber side. This lengthens the useful life of the pressure medium reservoir (10).
Abstract:
An expansion tank with an improved diaphragm seal includes a seal for the joint between the flexible diaphragm and either an optional. non-flexible diaphragm or the tank wall, the providing of a seal support that prevents collapse, delamination, or tearing of the 5 tank shell wall. The tank shell may be formed of two substantially hemispherical domes joined together, either directly or at the two ends of a substantially cylindrical section. One of the segments forming the shell of the expansion tank, further comprises an extension lip, extending inwardly of the tank and around the entire circumference of the inner surface of the shell wall, located substantially near the junction of two of the sections 10 forming the tank. This extension lip may be made from the same material as the tank wall, or may be part of a separate circumferential connector interconnecting two of the sections of the tank wall.
Abstract:
Ein Balgspeicher, insbesondere Pulsationsdämpfer, mit einem Faltenbalg (3), der in einem Speichergehäuse (1) angeordnet zwei Medienräume (27, 28) voneinander separiert und dessen Balgfalten (19) zumindest teilweise entlang der Innenwand (35) des Speichergehäuses (1) bewegbar sind, ist dadurch gekennzeichnet, dass der Außendurchmesser der Balgfalten (19) derart geringfügig kleiner gewählt ist als der zuordenbare Durchmesser der Innenwand (35) des Speichergehäuses (1), dass Räume (37, 41) gebildet sind, die in Summe eine hydraulische Dämpfung für zumindest ein Medium bilden.
Abstract:
The invention relates to a hydropneumatic pressure accumulator, in particular a pulsation damper, comprising an accumulator housing (2) and a movable separating element (20), which separates a pressurized working gas-containing gas working space (24) from a fluid chamber (22) in the accumulator housing (2). The hydropneumatic pressure accumulator is characterized in that a gas storage chamber (12) is provided, which contains an additional volume of the pressurized working gas, said gas storage chamber (24) being connected via a connecting path (30) having a throttle point.
Abstract:
Ein hydropneumatischer Druckspeicher, insbesondere Pulsationsdämpfer, mit einem Speichergehäuse (2) und einem beweglichen Trennelement (20), das im Speichergehäuse (2) einen ein unter Druck stehendes Arbeitsgas enthaltenden Gas-Arbeitsraum (24) von einem Fluidraum (22) separiert, ist dadurch gekennzeichnet, dass ein ein Zusatzvolumen des unter Druck stehenden Arbeitsgases enthaltender Gas-Vorratsraum (12) vorgesehen ist, der dem Gas-Arbeitsraum (24) über eine eine Drosselstelle enthaltende Verbindungsstrecke (30) zugeschaltet ist.