Abstract:
An accumulator membrane unit (2) for inclusion into an accumulator chamber (6) in an accumulator (1) for storing hydraulic energy under pressure. The accumulator membrane unit includes membrane elements (3) that are sealingly joined at their peripheries and limit an inside membrane volume (V) which varies in dependence of a pressure at an outside of the accumulator membrane unit. The invention also concerns an accumulator, a method and a rock drilling machine.
Abstract:
PROBLEM TO BE SOLVED: To attain miniaturization and weight reduction of equipment provided with a metal bellows by enhancing the durability of the metal bellows. SOLUTION: The metal bellows formed of precipitation hardening stainless steel with crest parts and trough parts alternately and continuously formed, has an average crystal grain diameter of 10-15 μm, and compressive residual stress of 500 MPa or more is applied to at least the surface of the crest parts and trough parts by surface working. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a diaphragm which contains a flexible film portion and an outer peripheral flange portion integrally provided on the peripheral edge of the film portion and sandwiches and holds an outer peripheral flange portion between a pair of a first housing and a second housing, wherein the film portion is prevented from rising upward when the diaphragm is attached to the housings.SOLUTION: An outer peripheral flange portion has a first pressed surface which is one surface of a diaphragm in a thickness direction and which comes into close contact with a first housing, and a three-dimensional shape composed of a projected portion or a recessed portion on the first pressed surface. A three-dimensional shape forms voids in a thickness direction between the outer peripheral flange portion and first housing with the outer peripheral flange portion compressed and deformed between the first housing and second housing and attached thereto.
Abstract:
Die Erfindung betrifft ein Hydraulik-Reservoir (1) für ein Hydraulikmittelleitsystem, mit einem Zulauf (2) zu einem Druckraum (3) und einem dazu beabstandeten und verfahrbaren Volumenausgleichselement (4), sowie einem an den Druckraum (3) angeschlossenen Überdruckventil (5), wobei das Überdruckventil (5) so angeordnet ist, dass eine in den Druckraum (3) am Zulauf (2) eingeleitete Druckschwankung zeitlich nach einem Erreichen des Volumenausgleichselements (4) am Überdruckventil (5) wirkt. Die Erfindung betrifft außerdem ein Hydraulikfluidleitungssystem mit einem erfindungsgemäßen Hydraulik-Reservoir.
Abstract:
The present invention provides a Type 3 pressure vessel comprising a polar boss that is attached to a metallic liner and provides reinforced static strength, fatigue strength, endurance, chemical resistance and/or corrosion resistance of the liner orifice or neck region. In particular, the material of the polar boss has higher static strength, fatigue strength, endurance, chemical resistance and/or corrosion resistance relative to that of the liner material.
Abstract:
The invention relates to a method for arranging a separating piston (18) in a system cavity, where the piston (18) is intended to seal off and separate a liquid medium from a second medium. A first part of a piston (18c) comprised in the separating piston (18) is lowered into the liquid medium in a direction towards the inner part (20) of the cavity, and a second part of a piston (18d) comprised in the separating piston (18) is lowered into the cavity and is caused to interact with the first part of the piston (18c) by the application of an interaction force (Fl) , via an actuating area (18p) located on the second piston (18d) . A volume of liquid (31) is thereby confined between the parts of the piston (18c, 18d) by the said interaction. All or parts of the confined volume of liquid (31) are forced out into the cavity under the first part of the piston (18c) via a passage (33) in this, and the volume of liquid thus forced out acts upon a lower area (18f) which is larger than an area (18h) on which the confined volume of liquid (31) acts upon. As a result of the difference in area, the first part of the piston (18c) is caused to move upwards in relation to the second part of the piston (18d) and to achieve a final position in which it is pressed together with the second piston (18d) to create the separating piston (18) as such. The separating piston (18) is at a distance from the said inner parts of the cavity. A spring function (21) is arranged to act on the separating piston (18) at the upper part (18e) of the second part of the piston (18d) . The invention also relates to a device with a separating piston (18) that can be given a non-critical position in a cavity (system) that is filled with liquid.
Abstract:
1. Fluidtechnische Vorrichtung; 2. Bei einer fluidtechnischen Vorrichtung wie Arbeitszylinder und Speicher, insbesondere Hydrospeicher, vorzugsweise Kolbenspeicher, mit einem eine Längsachse 9 definierenden Gehäuse, das an zumindest einem Ende eine zur Längsachse 9 konzentrische Gehäuseöffnung aufweist, die durch einen Deckel 11 geschlossen ist, der durch einen ihn zumindest teilweise umringenden, radial nach einwärts verformten Wandteil des Gehäuses formschlüssig gegen Axialkräfte gesichert ist, ist zur Sicherung des Deckels 11 auch gegen ein Verdrehen relativ zur Längsachse 9 eine den verformten Wandteil des Gehäuses aufnehmende, in den Umfang des Deckels eingearbeitete Nut 31 vorgesehen, die auf zumindest einem Teil einer den Deckel 11 umgebenden Windung eine Gewindesteigung besitzt.
Abstract:
An elastic thermoplastic diaphragm for use in a vessel having an inner surface. The vessel includes a liner that has an inner liner surface and first and second ends. A first endcap is secured to the liner first end and a second endcap to the liner second end. The diaphragm is secured to the inner vessel surface and seals along a peripheral edge to the vessel inner surface so as to define a volume inside the vessel. The diaphragm can flex, and thereby increase or decrease the volume.
Abstract:
Die Erfindung betrifft einen Druckspeicher für flüssige und/oder gasförmige Medien mit einem innerhalb eines Gehäuses angeordneten Faltenbalg, der zwischen einem Balgdeckel und einem Balgboden mehrlagig angeordnete, expandierbare Balglamellen aufweist, wobei jeweils die äusseren Balglamellen mit dem Balgdeckel beziehungsweise dem Balgboden druckdicht verbunden sind, sowie ein Verfahren zur Herstellung eines Faltenbalgs, insbesondere für einen Druckspeicher. Es ist vorgesehen, dass der Balgdeckel (28) und/oder der Balgboden (32) mit den äusseren Balglamellen (26 bzw. 30) nur in einem in Nähe des Innendurchmessers (56) liegenden Bereich (34) verbunden (gefügt) sind.