Hydac Technology Corporation

Airbus Operations Gmbh

Robert Marinus Behr

Peter Kloft

Herbert Baltes

Frank Thielecke

Arne Waitschat

Volker Baumbach

Alexander Wohlers

Jurgen Laude

Rolf Gossing

Simon MacLennan

Sebastian Lauckner

Jürgen Laude

Rolf Gössing

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 ().

Damping device

A reservoir for a hydraulic system has a housing with an interior space and a fluid outlet, a hydraulic driving device coupled to a shaft extending in the housing to introduce a torque, and a separating device in the housing, for dividing the interior space into two separate sections. The fluid outlet is fluidically connected to a first section. The separating device extends along the shaft in the housing and sets the size ratio of the two separate sections by pivoting at least one first surface, coupled to the shaft, of the separating device about an axis defined by the shaft. The separating device is coupled to the hydraulic driving device such that the at least one first surface exerts a pressure on a fluid in the first section which is dependent on a surface area of the first surface and the torque.

Reservoir for a hydraulic system

A damping device, in particular for damping or preventing pressure impacts, like pulsations, in hydraulic supply circuits has a damping housing () surrounding a damping chamber with a fluid inlet () and a fluid outlet (). A damping tube () is located in the flow path between the damping inlet and outlet and has a branch opening () passing through the tube wall and leading to a Helmholtz volume () inside of the damping housing () forming a Helmholtz resonator in a region positioned inside of the length of the damping tube. A fluid filter () is arranged inside of the damping housing () in the flow path between the fluid inlet () and fluid outlet ().

A damping device for damping or avoiding pressure surges, such as pulses, in hydraulic supply circuits has a damping housing () surrounding a damping chamber and having a fluid inlet () and a fluid outlet (). A fluid receiving chamber extends between the fluid inlet () and the fluid outlet (). During operation of the device, a fluid flow crosses the damping chamber in a throughflow direction (), from the fluid inlet () to the fluid outlet (). Parts of the fluid receiving chamber extend transversely with respect to the throughflow direction (). More than one fluid receiving chamber is arranged one after the other in the throughflow direction (). The fluid receiving chamber that is first upstream and the fluid receiving chamber that is last downstream immediately adjoin the fluid inlet () and the fluid outlet (), respectively.

A damping device, in particular for damping or avoiding pressure surges, such as pulses, in hydraulic supply circuits, preferably in the form of a silencer, has a damping housing surrounding a damping chamber and having a fluid inlet () and a fluid outlet (). A fluid receiving chamber () extends between the fluid inlet and the fluid outlet. A fluid flow crosses the damping chamber in a throughflow direction () from the fluid inlet () to the fluid outlet (). Parts of the fluid receiving chamber () extend transversely with respect to the throughflow direction (). The fluid receiving chamber () immediately adjoins the fluid inlet () and the fluid outlet (). A guide element () is provided in the damping chamber. The fluid flow flows against the guide element changing the flow speed of the flow at least in sections.

A damping device damps or prevents pressure shocks, such as pulsations, in hydraulic supply circuits, preferably in the form of a silencer, and has a damping housing () surrounding a damping chamber (), with a fluid inlet () and a fluid outlet (). A fluid receiving chamber () extends between the fluid inlet and fluid outlet. During operation of the device, a fluid flow coming from the fluid inlet () in a through-flow direction () traverses the damping chamber () toward the fluid outlet (). Parts of the fluid receiving chamber () extend in a direction transverse to the through-flow direction (). The fluid receiving chamber () is located directly adjacent to the fluid inlet () and the fluid outlet ().

A device for determining ageing of a hydraulic fluid in a hydraulic system with a multitude of hydraulic components is provided. The device comprises at least one temperature determination device and at least one ageing determination device, wherein the temperature determination device determines the respective temperature of each discrete fluid volume of the hydraulic fluid in the hydraulic system, and from the aforesaid the ageing determination device determines an increase in ageing. Generally, the temperature determination device carries out a numerical thermal simulation of the hydraulic system, component by component, including determining at least one temperature of at least one hydraulic component of the hydraulic system, which simulation is supported by measuring the temperatures of individual hydraulic components by means of temperature sensors.

Device and method for determining the state of ageing of a hydraulic fluid of a hydraulic system of a vehicle

The invention relates to a system for regulating a temperature of hydraulic fluid in at least one hydraulic circuit of an aircraft, wherein, in a periphery of the aircraft, additional hydraulic consumption units are each provided with at least one controllable valve for heating the hydraulic fluid above an adjustable minimum temperature limit value (T), wherein the controllable valve is closed during a maneuver of the aircraft, wherein the controllable valves of the additional hydraulic consumption units are closed when the temperature of the hydraulic fluid exceeds an adjustable theoretical temperature value (T), and wherein a temperature control system is connected to a temperature sensor for adjusting the controllable valve on the basis of a local temperature of the hydraulic fluid, the temperature sensor being near the hydraulic consumption units which are arranged in wings and tail of the aircraft.

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Weyhe, Germany

Robert Marinus Behr