Sauer Danfoss Aps

Danfoss A/s

Siemens Aktiengesellschaft

Sauer-danfoss (nordborg) A/s

Danfoss Fluid Power A/s

Claus J Johansen

Hans Christian Petersen

Uffe Eriksen

Tom Tychsen

Jens Anton Agerskov Veng

René Schibsbye Andersen

Kim René Hansen

Kim Rene Hansen

Rene Andersen

Joergen Pedersen

Svend Erik Thomsen

Tage Christiansen

Finn Lyhne

Jens K Jark

Thorvardur S Stefansson

Disclosed is a wind turbine, which comprises a rotatable structure being coupled to a hub of the wind turbine and to a generator rotor comprising a brake disc, a stationary structure being coupled to a generator stator and comprising a stator frame and a safety bearing element. The rotatable structure is rotatably coupled to the stationary structure, wherein the stator frame comprises a brake mounting section to which a calliper brake is mountable such that the brake disc is breakable by the mounted calliper brake. The safety bearing element is mounted to the brake mounting section such that the brake disc is in slidable contact with the safety bearing element if a distance between the brake mounting section and the brake disc is reduced below a predetermined reference value.

Air-gap secure system for a wind turbine

A hydraulic machine has a gear wheel () with outwardly extending teeth and a gear ring () with inwardly extending teeth formed by rollers each of which is supported in a pocket () in the gear ring, and pressurized spaces are formed between the gear wheel and the inwardly extending teeth. To keep the wear of the machine small, each pocket () has at least two different radii (R, R, Rn) whereby a radius (R, Rn) at a smaller displacement from the edge () of the pocket is larger than a radius (R) at a larger displacement from the same edge () of the pocket ().

Hydraulic machine

The invention concerns a hydraulic machine with a set of teeth, having a toothed ring with an inner toothing and a gear wheel with an outer toothing, the gear wheel rotating and orbiting in the toothed ring, the inner toothing and the outer toothing touching each other in contact areas, thus separating pressure chambers, and with a valve arrangement controlling a connection between a connection arrangement having a high pressure connection and a low pressure connection, and the pressure chambers. It is endeavoured to achieve a stable operation, particularly with low speeds. For this purpose, each contact area is provided with an opening, which, at the time when a pressure chamber reaches an extreme value of its volume, produces a short-circuiting with the neighbouring pressure chamber.

A hydraulic machine has a gear wheel () with outwardly extending teeth and a gear ring () with inwardly extending teeth formed by rollers each of which is supported in a pocket () in the gear ring, and pressurized spaces are formed between the gear wheel and the inwardly extending teeth. To keep the wear of the machine small each pocket () has at least two different radii (R, R, Rn) whereby a radius (R, Rn) at a smaller displacement from the edge () of the pocket is larger than a radius (R) at a larger displacement from the same edge () of the pocket ().

The invention concerns a hydraulic machine with a toothed set comprising a toothed ring with an inner toothing, whose circumferential surface extends in parallel with its axis, and a gear wheel () with an outer toothing, whose circumferential surface () extends in parallel with its axis, at least one tooth flank having an edge as an axial end of a section, which is located between the circumferential surface and a surface directed radially inwards. It is endeavored to reduce the wear. For this purpose it is ensured that in the radial direction an edge () ends so as to be offset inwards in relation to the circumferential surface ().

A hydraulic motor of the disc valve type has a disc valve with a plurality of commutation slots that can sequentially register with ports in a port plate as the disc valve is rotated with respect to the port plate. The commutation slots have a geometrical configuration that is complimentary in shape to a portion of the geometric configuration of the ports in the port plate to reduce the resistance to fluid flow through the ports and the slots when the complimentary shapes move into or from superimposed registering positions.

Hydraulic motor with disc valve commutating slots complimentary in shape to port plate ports

A gerotor motor has a housing located adjacent a port plate. The housing has two fluid chambers on opposite sides of a disc valve. The disc valve is in sealing surface engagement with the port plate to prevent fluid from moving between the fluid chambers. The valve assembly has forward and rearward sides and has substantially equal volumes of material removed therefrom so as to balance the port plate against any torsional forces imposed on the valve assembly which might otherwise deflect the valve assembly to interfere with its sealing relationship with the port plate.

Means for optimizing the disc valve in a gerotor motor

The invention concerns a rotary slide set for a hydraulic steering arrangement with an outer rotary slide and an inner rotary slide arranged in the outer rotary slide, and having in its surface tank grooves, which are, at least in predetermined rotary positions, connected with a low pressure connection, and at least one through-opening in its wall, each overlapping, at least partly, a tank groove. In a rotary slide set of this kind it is desired to avoid jamming between the inner and the outer rotary slides. For this purpose, surface recesses have been made at the remaining tank grooves to serve as balancing areas.

Rotary slide set for a hydraulic steering arrangement

Rotation connection for connecting unaligned machine elements

A hydraulic machine with an orbiting displacement element connected unrotatably with an output shaft via an intermediary shaft, the intermediary shaft having at least at one end an external toothing, which engages an internal toothing, which permits a swivel motion of the intermediary shaft. The external toothing has teeth with concavely shaped tooth sides having a smaller curvature at the axial ends than in the area of the axial center.

The control arrangement may be used for vehicles or in other steering systems and includes a steering motor that is adjusted as a function of hand operated steering mechanism, the steering mechanism controlling a directional section and a metering motor section. The directional section is fluidly connected between the steering motor and both of a tank and the metering motor section. A pump is connected between a tank and the metering motor section. The one sides of electromagnetic plus and negative valves are fluidly connected between the fluid connection of the metering motor section and the directional section while the opposite sides are respectively connected to the connection of the pump and the metering motor section and the connection of the directional section to the tank. A processing device for controlling the valves is provided for sensing the steering angle error. The control arrangement provides a simple structural arrangement to compensate for leakage.

Control arrangement for a fully-hydraulic steering system

The invention relates to a magnetic valve for a refrigeration plant. The valve is of the type having a magnetic coil with a plug member of magnetic material projecting into a central bore thereof. The yoke has parallel limbs. A housing block member is mounted in fixed relation to the coil and in spaced relation to the plug member to provide an armature space. A plunger type armature is disposed in the armature space where its stroke is limited at both ends thereof. The armature has a first end face magnetically pulled against the plug when the coil is energized and a return spring opposing the energizing force of the coil. The armature has a second end face at the other end thereof which is pushed into engagement with said housing block member by the return spring when the coil is deenergized. Layers of refrigerant-proof plastics such as polytetrafluoroethylene form one or both of the end faces of the engaging end faces between the plug member and the armature and between the armature and the housing block member. A resilient connection is provided between the plug member and the yoke to provide for cushioned relative movement therebetween.

Growing community of inventors

Sonderborg, Denmark

Claus J Johansen