Poclain Hydraulics Industrie

Julien Engrand

Jean Heren

Gilles Grillon

Stéphane Vidal

Dominique Costaz

Loic Bonnard

Stéphane Bernard Quertelet

Jean-Philippe Raisin

Adam Frey

Patrick Jalabert

Bertrand Bonnomet

Aurélien Ulmer

Sébastien Gonzalez

Philippe Telega

Stéphane Quertelet

Philippe Lucienne

Jérémy Gérard Respecte

Sebastien Gonzalez

Scott Glodowski

Scott Glodowsky

Loïc Bonnard

The rotating hydraulic machine () comprises: —a housing (), —a shaft () movably mounted relative to the housing about an axis, —an apron () rigidly connected to the shaft and extending around at least a portion of the housing, —a cam () rigidly connected to either the housing or the shaft, —a cylinder block () rotationally connected to the other of either the housing or the shaft, the cylinder block comprising pistons capable of engaging with the cam to produce a relative rotation between the shaft and the housing, —first and second guide bearings () each bearing directly on the housing and the apron, and —at least a third guide bearing () bearing directly on the housing and the cylinder block.

Hydraulic machine comprising bearings for supporting the rotating component

A hydraulic machine has a first assembly and a second assembly movable in rotation relative to each other along an axis of rotation. The hydraulic machine has a crankcase defining an internal volume, in which an interface between the fixed assembly and the movable assembly has a housing provided with a first sealing element ensuring the sealing of the internal volume relative to the external environment. A second sealing element is positioned between the internal volume and the housing. The second sealing element is adapted to allow a passage of fluid from the internal volume to the housing when the pressure deviation between the internal volume and the housing is less than or equal to a threshold value, and to isolate the housing from the internal volume when the pressure deviation is greater than the threshold value.

Sealing device for a hydraulic machine

A hydraulic machine including an improved sweep circuit, adapted to form a primary sweep stream circulating from an inlet orifice successfully in a proximal portion, in a middle portion and in a distal portion of the hydraulic machine, then in the middle portion and in the proximal portion up to an outlet orifice.

Flushing circuit for a hydraulic machine

A casing for a rotating machine includes a first fixed segment, and a second segment rotating along an axis of rotation (X-X). The first segment and the second segment are in contact along an interface provided with a sealing element. The sealing element is positioned in a housing connected to the internal volume of the casing, and also to the surrounding medium. The connection between the housing and the surrounding medium is made via a duct. The first casing segment or the second casing segment has a planer positioned at an outer end of the duct.

Sealing device for a casing

A hydraulic piston machine including a housing, a shaft that is able to rotate relative to the housing, and a cam secured to one of the housing or the shaft. A cylinder block includes pistons that are able to move in the cylinder block opposite the cam in order to generate relative rotation between the cylinder block and the cam. The cylinder block is linked in rotation to the other of the shaft or the housing. A mechanism forms rotation guide bearings for guiding the rotation of the shaft relative to the housing, which mechanism includes a tapered plain bushing interposed between a housing element and an element linked in rotation with the shaft and in which the tapered plain bushing includes a radial through-slit extending through the entire radial dimension of the bushing.

Hydraulic machine comprising an improved bearing

A braking device may include a brake casing rotatably assembled with respect to a shaft along an axis of rotation, first braking elements and second braking elements, forming a stack, an elastic return element configured to exert an application force on the first and second braking elements, and a brake release actuator, adapted to bias the elastic return element along a direction opposing the application direction. The braking device a may include a diffusion wedge and a pressure wedge positioned respectively to bear against the stack and against the elastic return element. The diffusion wedge and the pressure wedge may have contact surfaces defining an annular linear contact about the axis of rotation.

Braking device

A hydraulic apparatus comprising a casing () having arranged therein a hydraulic machine (), a shaft () mounted to rotate relative to the casing () by means of a bearing (), a braking system () having a plurality of brake disks () configured to prevent the shaft () rotating relative to the casing () in selective manner, and a control system () for controlling said braking disks (), the hydraulic system including an irrigation system adapted to cool said brake disks () by means of a fluid, the irrigation system including a fluid inlet () and a fluid outlet (), the hydraulic system being characterized in that the fluid inlet and outlet () of the irrigation system define a fluid flow within the casing in which the braking system () is downstream from the hydraulic machine ().

Braking system for a hydraulic machine

A hydraulic machine () comprising first and second brake elements (), a spring washer () tending to urge the first and second brake elements () in a braking direction, and a brake release piston () configured to act on the spring washer () in a direction opposing the braking direction, the hydraulic machine being characterized in that the brake release piston () comprises a primary brake release piston () associated with a primary brake release chamber (), and a secondary brake release piston () associated with a secondary brake release chamber (), said primary and secondary chambers () extending radially around the shaft () in such a manner that projections of the primary brake release chamber () and of the secondary brake release chamber () onto a plane perpendicular to a longitudinal axis (X-X) defined by the axis of rotation of the hydraulic machine () are superposed, at least in part.

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Verberie, France

Julien Engrand