Hydac Technology Corporation

Airbus Operations Gmbh

Dynamit Nobel Defence Gmbh

Peter Kloft

Herbert Baltes

Robert Marinus Behr

Frank Thielecke

Arne Waitschat

Frank Bauer

Norbert Weber

Horst Mannebach

Wolfgang Hahmann

Torsten Kusserow

Walter Dorr

Alexander Albert

Alexander Wohlers

Jiang Zhang

Armin Kort

Norbert Lange

Alexandra Welp

Daniel Feld

Joerg Meyer

Jens Holger Koehne

Petra Jochum

Klaus-Jurgen Dell

Matthias Agostin

Stephan Cordes

Axel Hemmer

Simon MacLennan

Michael Köller

Herbert Weisshaupt

Daniel Rau

Horbert Baltes

Jörg Meyer

Armin Reinhold Kort

Norbert Walter Lange

Michael Weis

Robert Marins Behr

Klaus-Jürgen Dell

Jens Holger Köhne

Separator and hydraulic accumulator having such a separator. A separator, in particular for a hydraulic accumulator, such as a bellows accumulator, which is produced by a 3D printing process, consisting of one single diaphragm, which, when viewed in cross section, is deflected in an arcuate shape to form a multitude of bellows pleats at deflection points, which delimit the bellows pleats on the outside and the inside, and in that, to obtain an isotensoid or essentially isotensoid stress profile in the diaphragm, the notional extensions of the diaphragm surfaces adjacent to each deflection point form an acute angle with each other, at least in an initial state.

Separator and hydraulic accumulator having such a separator

The disclosure relates to an hydraulic accumulator, in particular a diaphragm accumulator, having an accumulator housing and a separating element disposed therein, which separates two media spaces from each other, wherein a weld seam is formed by a laser or electron beam welding process without any filler materials, in that at least a part of the wall parts delimiting the transition point are melted to form the weld seam, which closes off the transition point towards the surroundings, in a manner that is free of protrusions with respect to an outer circumferential surface of a connection element.

Hydraulic accumulator

A damping device, in particular for damping or preventing pressure surges, such as pulsations, in hydraulic supply circuits, preferably in the form of a silencer, has a damping housing () encompassing a damping chamber (). The damping housing () has at least one fluid inlet () and at least one fluid outlet (), as well as a fluid receiving chamber extending between the fluid inlet () and the fluid outlet (). During operation of the device, a fluid flow coming from the fluid inlet () passes through the damping chamber () towards the fluid outlet (). A wall part of the fluid receiving chamber extends as a guide element () in at least one direction of extension transverse to the direction of the fluid flow. In the damping chamber (), several guide elements () are provided, against which guide elements the fluid can flow to alter the flow velocity in certain areas.

Damping device

A cutting roller has an axle (), on which a cutting ring () is rotatably guided by a bearing device (). The bearing device is sealed against the environment by a sealing device (). By a compensating device (), any differential pressure between the bearing device () and the environment is compensable.

Cutting roller

A bellows accumulator, consisting of at least two housing parts () which form an accumulator housing (), and having a separating bellows (), which is movably arranged in the accumulator housing () and separates two media spaces () from each other and is at least on its one free end fixed to a securing device () in the accumulator housing (), wherein said securing device () is welded to the adjacently arranged housing parts (), is characterized in that the adjacently arranged housing parts () comprise at least in part titanium materials, in that the securing device () consists of at least two interconnected components (), at least one () of which comprises at least in part titanium materials and is welded to the adjacently arranged housing parts (), and in that the respective other component (), consisting of a different metal material, is used for securing the separating bellows () to the securing device ().

Bellows accumulator

A hydraulic accumulator, in particular in the form of a piston accumulator, has an accumulator housing () and a separating element () arranged in the housing. The separating element is in the form of a piston, which separates a fluid side () from a gas side (). At least the gas side () can be inspected, at least in part, by at least one sight glass () that is fixed in the accumulator housing ().

A bellows accumulator has at least one accumulator housing () and a separating bellows () movably arranged in the accumulator housing (). The separating bellowshas a plurality of bellows folds and separates two media spaces () from one another. The stationary open end of the separating bellows () is fixed to the accumulator housing () by a securing device (). The separating bellows () has, at its movable other end, a closure part () having a guide device () by which the closure part () is guided in the accumulator housing (). The closure part () has, in addition to the guide device (), a sealing device (). At least in the one extended end position of the separating bellows (), the sealing device () separates a fluid space (), in which the bellows folds are arranged in the accumulator housing (), from a fluid port () in the accumulator housing (). At least in some of the other working positions, the sealing device () releases this fluid connection.

A pressure accumulator having an accumulator housing () in which a movable separating element () separates a gas chamber () filled with a working gas from a fluid chamber () in a fluid-sealed manner. A monitoring device () is provided, which, in the event of a fault impairing the sealing effect of the separating element (), provides an optically discernible indication and has an inspection window (), through which an indicator can be observed. The monitoring device is connected to the gas chamber () and changes optical properties discernibly when wetted with the fluid. The indicator changing its optical properties is accommodated in a capsule () with a capsule wall () permeable to the passage of the fluid and arranged between the inspection window () and the separating element () in the accumulator housing ().

Pressure accumulator having a monitoring device

A tensioning cylinder device includes a housing (), at least partly longitudinally movable piston-rod unit () arranged in the housing and a compensating element in the form of a bellows body () having bellows folds. The bellows body is longitudinally variable and has a media-carrying connection to a compressible medium accommodated in a medium chamber () in the housing ().

Tensioning cylinder device

An equalization device is, in particular, in the form of a tank. The housing () of the tank has at least one inlet () and one outlet () for receiving and discharging fluid, respectively, at least in one of the housing walls () of the housing, which housing can be filled with the fluid. At least one equalization body () is arranged within the housing (). The equalization body is at least partly provided with an elastically compliant separating wall (). The interior of the equalization body is delimited, and is at least partly in pressure-equalizing connection () with the surroundings at a passage () through one of the housing walls ().

Equalization device, in particular in the form of a tank

A method for producing pressure vessels, including pressure accumulators, such as hydraulic accumulators and parts of the parts of the accumulator (). The parts produced by a 3D printing method can include one or more or all of two housing parts and a separating element separating the interior chamber of the two hosing parts are at least partially produced by a 3D printing method.

Method for producing pressure vessels

A damping device, particularly for damping or avoiding pressure surges such as pulses, in hydraulic supply circuits, preferably in the form of a silencer, includes a damping housing that surrounds a damping chamber (), has at least one fluid inlet (), has at least one fluid outlet () and has a fluid receiving chamber () extending between the fluid inlet () and the fluid outlet (). During operation of the device, a fluid flow crosses the damping chamber () in a through-flow direction (), coming from the fluid inlet () in the direction of the fluid outlet (). At least parts of the fluid receiving chamber () extend in at least one extension direction transversely with respect to the through-flow direction (). The fluid receiving chamber () immediately adjoins the fluid inlet () and the fluid outlet () and is delimited by at least one yielding wall part ().

A device determines the weight of a hydraulic accumulator () during its operation in a hydraulic facility. A pressurised liquid is introduced into a pressure vessel at least partially filled with a gas. The pressurised liquid compresses the gas and is stored in such a way that when it leaves the accumulator () hydraulic energy is emitted to the facility. The respective current weight of the hydraulic accumulator () is detected by a weighing device () applied to the hydraulic accumulator ().

Device and method for determining the weight of a hydraulic accumulator

A hydropneumatic piston accumulator has an accumulator housing () defining a housing longitudinal axis () and a piston () longitudinally movable between two housing covers () positioned opposite each other. In the housing (), the piston () separates a working chamber () for a compressible medium, such as a working gas, from a working chamber () for an incompressible medium, such as hydraulic fluid. A piston part () of a displacement measurement device continuously determines each position of the piston () in the housing (). A rod-shaped guide () is stationarily positioned in the accumulator housing () and passes all the way through the piston () in each of its displacement positions in the accumulator housing (). The piston () is movably guided along the guide until it reaches the stop on one of the two housing covers () and is sealed against this guide () using a sealing device ().

Hydropneumatic piston accumulator

A hydropneumatic piston accumulator has an accumulator housing () with a cylindrical tube () defining a longitudinal axis (). The cylindrical tube () is closed at both ends by housing covers (). A piston () is longitudinally movable in the cylindrical tube () and separates a working chamber () for a compressible medium from a working chamber for an incompressible medium. A displacement measuring device determines the position of the piston () in the housing in a contact-free manner. The displacement measuring device includes a non-magnetic measuring tube () extending along the longitudinal axis () from one housing cover () to the other housing cover () and through a passage () formed in the piston () and is sealed against the interior of the housing (). In the tube (), a position sensor () is movably guided and follows the piston movements in the measuring tube () using a magnetic force acting between the piston sensor () and the piston (). A transmitter/receiver () for the displacement measuring device is positioned on one of the housing covers () and emits a measurement beam through the open end () of the measuring tube () to the position sensor () and receives reflected radiation.

Growing community of inventors

Ransbach-Baumbach, Germany

Peter Kloft