Zf Friedrichshafen Ag

Reinhold Mayer

Christian Selinka

Walter Fritz

Michael Ptock

Dirk Huhn

Thomas Meid

Michael Huber

Gert Bauknecht

Alfred Skrabs

A hydrodynamic retarder having a first blade wheel and having a second blade wheel concentric thereto, together forming a hydrodynamic circuit grouped about a common rotary axis. Each blade wheel is made of a base body and a blade arrangement fixed thereto including a plurality of blades. The hydrodynamic circuit is supplied by a fluid inlet, while the fluid removal from the hydrodynamic circuit is performed by a fluid outlet. The fluid inlet has an inlet spiral enabling tangential fluid flow and the fluid outlet has an outlet spiral enabling tangential fluid flow. At least one inlet spiral is associated with a flow guide guiding the fluid into the hydrodynamic circuit with at least one axial component.

Hydrodynamic retarder

A hydrodynamic retarder having a first blade wheel and a second blade wheel concentric thereto, forming a hydrodynamic circuit grouped about a common rotary axis. Each blade wheel includes a base body and a blade arrangement fixed thereto including a plurality of blades each connected to receptacles in the base body. A first ring segment of at least one blade wheel includes at least one first blade having a flow edge facing the other blade wheel in each case, said edge having at least one extension running in a substantially straight line between the radial outer end thereof and the radial inner end thereof, and at least one second blade is provided in a second ring segment of the blade wheel, the blade having a retraction both opposite the flow edge facing the other blade wheel in each case, and opposite a protrusion protruding in the direction of the other blade wheel.

A process of manufacturing a component for a hydrodynamic machine in which the component comprises a base body ( ) and a plurality of blades ( ) which are to be installed on the base body ( ). The process comprises the steps of installing the plurality of blades ( ) on the base body ( ) by a shaped fitted connection with the base body ( ) by applying continuous pressure against the base body ( ) and using a prefabricated torus as the base body ( ). The prefabricated torus is pressed by a pressure roller ( ) against the plurality of blades ( ) while holding the plurality of blades ( ) in a device ( ) against the pressure of the pressure roller ( ). A component for a hydrodynamic machine, comprising a base body ( ) and a plurality blades ( ) installed by the inventive process, is also disclosed.

Fitting of blades in hydrodynamic machines

The device for complete draining of the oil in a component of a motor vehicle such as hydraulic steering, transmission with converter or automatic transmission which has within the component, an oil drain valve for at least one oil chamber in the component, which oil drain valve is automatically opened when the plug of the component is removed.

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Ravensburg, Germany

Reinhold Mayer