Robert Boschgmbh

Bosch Rexroth Ag

Michael Wilhelm

Ruediger Weiss

Michael U Fischer

Stefan Cerny

Guido Bredenfeld

Klaus Griese

Kai Sutter

Dietmar Schwuchow

Marc Laetzel

Sebastian Birk

Sebastian Tetzlaff

Volker Fissler

Andreas Leinberger

Markus Stahl

Christian Boehmcker

Juergen Breuninger

Michael Fischer

Marc LÄTZEL

Andreas Klaiber

Heinz Martin

Dieter Haecker

Christoph Kessler

A gear machine includes two externally intermeshing gear wheels enclosed by a housing that has a high-pressure connection and a low-pressure connection situated opposite one another. On an inner circumferential face of the housing, a notional boundary line is assigned to both gear wheels. The line runs parallel to the line of contact between the gear tooth tips of the gear wheels and the inner circumferential face. The intersection edge is located between the two boundary lines and the minimum distance between the intersection edge and the boundary lines are at least one pitch interval of the gear wheels. The cross sectional shape of the low-pressure connection deviates from the circular shape such that its cross sectional area overlapping the gear wheels is greater than the cross sectional area of a notional, circular low-pressure connection overlapping the gear wheels at the same minimum distance from the boundary lines.

Gear machine having a non-circular low-pressure connection

A toothed wheel machine including a housing for receiving two meshing and especially helical-toothed wheels. The toothed wheels are axially mounted in a sliding manner by axial surfaces between bearing bodies received in the housing, and radially by a bearing shaft received in the bearing bodies. During the operation of the toothed wheel machine, an axial component of a force resulting from the hydraulic and mechanical forces generated during operation acts on each toothed wheel in the same axial direction. A counter-force against the respective axial force component is applied to the toothed wheels and/or bearing shafts, each counter-force applying the same amount of pressure as the respective axial force component, or less than same.

Hydraulic toothed wheel machine

What is disclosed is a a pressure limiting valve comprising a valve body, the axial movement of which is damped by means of a damping device. In accordance with the invention, the damping device includes a damping chamber formed on the return side, that is subjected to the system pressure acting on a pressure port.

Pressure limiting valve

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Vaihingenenz, Germany

Michael Wilhelm