Abstract:
A hydraulic accumulator assembly (1) in which a hydraulic accumulator (2) is associated with at least one sensing device (4, 7, 11 or 12) configured to provide an indication of the displacement of an internal divider (3 or 10) within the accumulator to provide an indication of the volume of gas within the hydraulic accumulator.
Abstract:
A replaceable antenna assembly (1) for use with a piston accumulator (2) configured for supplying fluid to a hydraulic cylinder, the antenna assembly (1) comprises; -a hollow manifold (3) for flow of fluid, and -an antenna (4) connected into or onto the manifold (3) for emitting and receiving electromagnetic waves, wherein the hollow manifold (3) is connectable to and configured to be in fluid communication with both the piston accumulator (2) at one end and a pressure line (5) at the other end, said pressure line (5) being connectable to an external high pressure gas bank, and wherein the antenna assembly (1) further comprises; -at least one first bore (6) for transferring signals to and from the antenna (4), and -at least two fluid channels(7) symmetrically displaced around the circumference of the antenna, thereby ensuring that most of, or all, fluid flows on the radial outside of the antenna (4)during use.
Abstract:
Es wird ein Kolbenspeicher (1) zur hydraulischen oder pneumatischen Speicherung von Energie beschrieben, bei dem ein Trennelement (5) innerhalb eines Speichergehäuses (3) entlang einer Verlagerungsrichtung (7) verlagert werden kann. Eine aktuelle Position des Trennelements (5) wird dabei mit Hilfe einer optischen Messvorrichtung (27) beispielsweise in Form eines Laserabstandsmessgerätes berührungsfrei bestimmt. Die Messvorrichtung (27) kann hierzu Licht von einer Lichtquelle (29) hin zu einer gegenüberliegenden Oberfläche des Trennelementes (5) emittieren und dort reflektiertes Licht mit Hilfe eines Lichtdetektors (31) detektieren. Aus der Laufzeit des Lichtes kann auf die Position des Trennelementes (5) rückgeschlossen werden.
Abstract:
Ein Hydrospeicher weist auf: a) ein Speichergehäuse (1) aus nicht-magnetisierbarem Werkstoff, das eine Axialrichtung des Gehäuses definiert, b) ein im Speichergehäuse (1) axial bewegbares Trennelement (9), das im Speichergehäuse (1) zwei Arbeitsräume (5, 7) voneinander trennt, c) eine am Trennelement angeordnete, ein Feld erzeugende Magnetanordnung (29) und d) eine an der Auβenseite des Speichergehäuses (1) angeordnete, sich längs der Bahn der Axialbewegung des Trennelementes (9) erstrekkende Reihe von Magnetfeldsensoren (35), die auf das Feld der Magnetanordnung (29) am Trennelement (9) ansprechen, um dessen Position entlang der Reihe von Magnetfeldsensoren (35) zu kennzeichnen.
Abstract:
The invention relates to a pressure means storage device, comprising a housing (1), the inside of which is divided into two chambers (3, 4) by a media separation element (2). The first chamber (3) is filled with a gas and the second chamber (4) is filled with a liquid. A bottom valve (6) which allows the second chamber (4) to be filled with the liquid and prevents said second chamber (4) from being completely emptied is provided in a hydraulic connection (5), the closing body (7, 40) of said valve being activated by the media separation element (2). According to the invention, the closing body (7, 40) can be moved by means of the media separation element (2 or 16) into a position in which it performs the function of a hydraulic piston. This prevents the bottom valve from being damaged and any unwanted leakage of the liquid, hereby considerably increasing the functional reliability.
Abstract:
In a measurement system for sensing the position of a piston (6) capable of moving within a cylinder (1) to which a pressure may be applied, a position transmitter (11), for example a magnet, is linked to the piston (6) inside the cylinder (1), and a sensor (12) that may be driven outside the cylinder (1) by a drive (13, 14) along the path of displacement of the position transmitter (11) senses a signal intensity depending on its distance from the position transmitter (11). The sensor (12) is driven by a regulator (17) in such a way that it presents a maximum signal intensity. By detecting the position of the sensor (12), the position of the position transmitter (11) may be deducted.
Abstract:
The invention relates to an accumulator (1) comprising: - a housing (2); - a piston (3) arranged in the housing and movable in an axial direction, wherein the piston seals on the inner wall of the housing and divides the housing in a first fluid tight space (5) and a second space (6); - a supply opening (7) arranged in the housing (2) and in fluid connection with the first fluid tight space (5); - urging means for urging the piston towards the supply opening, wherein the urging means are arranged in the second space; - a magnet (8) arranged at the circumference of the piston and adjacent to the housing inner wall, wherein the housing is of a non-ferromagnetic material, such as stainless steel; and - an indicator (11) arranged on the outside of the housing and movable in axial direction, wherein the indicator comprises at least a ferromagnetic part for interaction with the attractive force of the magnet.
Abstract:
Vorrichtung zur Bestimmung der Position eines beweglichen Trennelements (10), das innerhalb eines Speichers (12) als Abtrennung zwischen einem Gasraum (14) und einem Fluidraum (16) angeordnet ist, wobei die Bestimmungsvorrichtung zumindest einen Drucksensor (26) zur Erfassung von Druckdaten, zumindest einen Ultraschallsensor (28) zur Erfassung von Ultraschalldaten und zumindest eine Rechnereinheit (30) zum Auswerten der Daten umfasst, mit der die Position des Trennelements bestimmbar ist.
Abstract:
A pressure compensation system for compensating volume variations of a liquid in a chamber of a subsea device is provided. A subsea enclosure of the subsea device encloses the chamber. A first pressure compensator has a first compensation volume and provides pressure balancing between ambient medium surrounding the subsea device and the first compensation volume. A first biasing device is configured to bias the first pressure compensator such that the pressure in the first compensation volume is higher than the pressure in the ambient medium surrounding the subsea device. A second pressure compensator has a second compensation volume and provides pressure balancing between the ambient medium and the second compensation volume. A second biasing device biases the second pressure compensator such that the pressure in the second compensation volume is higher than the pressure in the ambient medium. A control unit is connected to control first and second valves arranged in flow connections between the first and second compensation volumes and the chamber.
Abstract:
A replaceable antenna assembly for use with a piston accumulator configured for supplying fluid to a hydraulic cylinder is provided. The antenna assembly includes a hollow manifold for flow of fluid and an antenna connected into or onto the manifold for emitting and receiving electromagnetic waves. The hollow manifold is connectable to and configured to be in fluid communication with both the piston accumulator at one end and a pressure line at the other end. The pressure line is connectable to an external high pressure gas bank. The antenna assembly further includes at least one first bore for transferring signals to and from the antenna and at least two fluid channels symmetrically displaced around the circumference of the antenna, thereby ensuring that most of, or all, fluid flows on the radial outside of the antenna during use.