Poclain Hydraulics Industrie

Gilles Grillon

Julien Engrand

Stéphane Vidal

Bertrand Bonnomet

Stéphane Bernard Quertelet

Dominique Costaz

Adam Frey

Loic Bonnard

Patrick Jalabert

Jeremie Mulot

Stéphane Quertelet

Scott Glodowski

Jérémy Gérard Respecte

Philippe Lucienne

Philippe Telega

Loïc Bonnard

Scott Glodowsky

Julien René Engrand

Jérémie Mulot

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 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 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.

Braking system for a hydraulic machine

The present invention relates to a system comprising: a shaft having a distal end and a proximal end; a casing defining a housing in which a hydraulic device is rotatably mounted on the shaft; and a sealing element comprising a low pressure dynamic sealing means and a reinforced dynamic sealing means formed by a static seal tightly mounted on a friction pad, such as to isolate the dynamic sealing means from the rotating hydraulic device, said sealing element defining a discharge chamber between the dynamic sealing means and the reinforced dynamic sealing means, which discharge chamber is connected to a drain via a pipe arranged on the surface of the shaft, between the hydraulic device and the shaft, so as to discharge the fluid located in the discharge chamber, such that said discharge chamber is not subjected to the pressure in the casing of the hydraulic device.

Growing community of inventors

Sacy le Grand, France

Gilles Grillon