Carl Freudenberg Kg

Boris Traber

Olaf Nahrwold

Stefan Sindlinger

Thomas Kramer

Frank Lauer

Tanja Claus

Matthias Adler

Christian Kleinke

Christine Portela Cubillo

Jasmin Menzel

Sascha Moeller

Christian Geubert

Erich Prem

Helmut Leitner

Friederike Von Fragstein

Randolph Gaa

Kai Feller

Katharina Hallstein

Thomas Schnetz

Stephan Rutz

Olaf Kobs

Guido Hohmann

Rainer Kreiselmaier

Christoph Naumann

Eva Fleischmann

Sascha Moller

The invention relates to a dynamic shaft seal which comprises (a) elastomer material and (b) graphene without a chemically modified surface in an amount of from 0.1 to 2 phr, in relation to 100 parts by weight of the elastomer material, as the sole constituent of the dynamic shaft seal made of elemental carbon.

Dynamic shaft seal

A seal assembly includes: a seal element; a part to be sealed; and a measuring arrangement for monitoring an aging of the seal element. The seal element is held on the part so as to provide a contact stress between the seal element and the part. The seal element has a contact face with which the seal element bears against the part. At least one measuring component of the measuring arrangement is integrated in each case into the seal element and into the part. The contact face of the seal element has a surface geometry with depressions.

Seal assembly and method for monitoring a seal assembly

A method includes using a sealing element to dynamically seal a sealing body in the presence of a lubricant. The sealing element has an elastomeric base body and a plasma coating. The coating includes the elements carbon, oxygen, silicon, and hydrogen. The coating has the following properties at least at the surface: the amount ratio C:Si (at %/at %) is &#x3e;5, the amount ratio O:Si (at %/at %) is &#x3e;3, and the surface energy is &#x3c;50 mN/m. In an embodiment, the coating includes the element fluorine.

Plasma-coated sealing element

A sensor element includes: a supporting body; and a sensor body, the sensor body being planar in shape, being made of an elastic material, and having a first surface and a second surface coated so as to be electrically conductive. The sensor body includes a measuring segment and a fastening segment. A layer thickness of the fastening segment is greater than a layer thickness of the measuring segment.

Sensor element with fastening segment

A sensor element includes: a supporting body; and a sensor body, the sensor body being planar and being formed of an elastic material, a first surface and a second surface of the sensor body each having an electrically conductive coating. The supporting body and the sensor body are integrally formed.

Sensor element with integral supporting and sensor body

A seal arrangement for sealing a gap between a machine element comprising a shaft and a housing includes: at least one sealing element formed, at least partially, from polymeric material. The at least one sealing element is of annular design and is made of PTFE. The at least one sealing element has at least one first annular element and at least one second annular element. The at least one first element is electrically conductive and the at least one second element is electrically insulating. The at least one first element is arranged axially adjacently to the at least one second element. The at least one sealing element is provided with electrically conductive contact elements. The housing has an installation space forming an annular groove for the at least one sealing element. The installation space is provided with a lining forming an insulation.

Seal arrangement

A sealing arrangement for sealing a gap between a machine element and a housing includes: at least one sealing element; and an insulation which electrically insulates the at least one sealing element from the machine element and the housing. The at least one sealing element is at least partially electrically conductive.

A sealing body for dynamic applications has a Shore A hardness of between 60-100, comprising an elastomer material and carbon nanotubes distributed in the elastomer material in an amount of between 0.1-20 phr, with respect to the total amount of elastomer material.

Sealing body for dynamic applications

In an embodiment, the present invention provides a seal with at least one sealing lip to seal a gap between a machine component and a housing, including: a main body made from resilient material, the main body being equipped such that it is electrically conductive and is covered with a jacket made from an electrically insulating material on at least part of its outer side. The jacket is assigned to at least those regions of the main body that are in contact with the machine component and the housing.

Seal and seal assembly

A sealing arrangement includes: a sealing ring having at least one dynamically loaded sealing lip, the sealing ring including a core comprised of an electrically conductive material and a casing comprised of an electrically insulating material, the casing having a material thickness, surrounding the core at least in part and including the sealing lip; a machine element to be sealed that has a surface to be sealed, which surface is electrically conductive and surrounded by the sealing lip in a radially prestressingly sealing manner; and a wear detector, which has an electric measurement device for detecting a state of wear of the sealing ring. When viewed in section, the material thickness of the sealing lip is smaller in a radial direction than the material thickness of a remainder of the casing.

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Hirschberg, Germany

Boris Traber