Fluoropolymer compositions are described which comprise tetrafluoroethene polymers and substantially spherical particles. Further provided are methods of making such compositions and articles prepared from such compositions. The compositions can be used to increase the wear resistance and/or the electrical insulation properties of an article.

Fluoropolymer compositions are described which comprise tetrafluoroethene polymers and substantially spherical particles. Further provided are methods of making such compositions and articles prepared from such compositions. The compositions can be used to increase the wear resistance and/or the electrical insulation properties of an article.

A ring seal apparatus for high temperature sealing includes a first ring including a pair of radial faces and a second ring including a second pair of radial faces, the second ring adapted to coact with the first ring. The first and second rings together define a pair of coacting mating faces. The mating faces are obliquely angled relative to the radial faces, such that each of the coacting mating faces is adapted to seal an interface of the two rings at an angle relative to their substantially parallel radial faces. The pair of coacting rings is adapted to seal a circumferential gap between a pair of components.

A sealing system is between two components, which are translatorily movable relative to each other along a motional axis for sealing off a high-pressure side from a low-pressure side. The sealing system includes pressure relief elements. The use of such a sealing system produces an intermediate-space pressure cascade.

The present invention relates to a pre-mounted exchange insert of a drill wash device for connecting a stationary washpipe to a rotating washpipe of a drill hole, the exchange insert comprising a mechanical seal assembly (2) with a stationary seal ring (20) and a rotating seal ring (21), a first seal ring carrier (3) on which the stationary seal ring (20) is arranged, a second seal ring carrier (4) on which the rotating seal ring (21) is arranged, a connection component (5) which is configured to connect the exchange insert to the stationary washpipe, and an adjusting mechanism (6) operative in axial direction (X-X) with a screw connection (60) for changing an axial length (L1, L2) of the exchange insert, wherein the screw connection (60) is connected to the second seal ring carrier (4) to permit, in axial direction (X-X), an adjustment of the second seal ring carrier (4), the mechanical seal assembly (2), and the first seal ring carrier (3) relative to the connection component (5).

An assembly is provided that includes a shaft, a bearing, a stator seal element, a rotor seal element and a shield. The shaft extends along an axis. The bearing supports the shaft and receives lubrication fluid. The stator seal element circumscribes the shaft. The rotor seal element is mounted on the shaft axially between the bearing and the stator seal element. The rotor seal element forms a seal with the stator seal element. The shield substantially prevents the lubrication fluid from traveling axially away from the bearing onto the rotor seal element.

An assembly is provided that includes a shaft, a bearing, a stator seal element, a rotor seal element and a shield. The shaft extends along an axis. The bearing supports the shaft and receives lubrication fluid. The stator seal element circumscribes the shaft. The rotor seal element is mounted on the shaft axially between the bearing and the stator seal element. The rotor seal element forms a seal with the stator seal element. The shield substantially prevents the lubrication fluid from traveling axially away from the bearing onto the rotor seal element.

A sealing device for a drive shaft is disclosed and described. The sealing device for a drive shaft comprises a housing disposed to surround the drive shaft between the inner space and the outer space, a plurality of sealing members axially separated from each other between the housing and the drive shaft to seal between the housing and the drive shaft, fixing ring members interposed between the plurality of sealing members to maintain the separation distance between the sealing members, and a fixing member secured to the housing to apply an axial pressure to the plurality of sealing members and fixing ring members, wherein a concave-convex section is formed on at least one of the close surfaces of the fixing ring member and the sealing member, which face each other.

A sealing device for a drive shaft is disclosed and described. The sealing device for a drive shaft comprises a housing disposed to surround the drive shaft between the inner space and the outer space, a plurality of sealing members axially separated from each other between the housing and the drive shaft to seal between the housing and the drive shaft, fixing ring members interposed between the plurality of sealing members to maintain the separation distance between the sealing members, and a fixing member secured to the housing to apply an axial pressure to the plurality of sealing members and fixing ring members, wherein a concave-convex section is formed on at least one of the close surfaces of the fixing ring member and the sealing member, which face each other.

An axial shaft seal ring has a holding portion and a sealing portion, which are connected to one another via an elastically deformable sealing membrane. The sealing membrane has a plurality of spatial structure areas R in the circumferential direction of the shaft seal ring, which serve as a circumferential reserve of the sealing membrane. As a result of a centrifugal force F.sub.R accompanying a rotational movement of the shaft seal ring around the central axis thereof and acting on the sealing membrane, an expansion of the sealing membrane in a radial direction is effected at least in the spatial structure areas, in such a manner that the sealing portion is acted upon by the sealing membrane with an axially directed pull force F.sub.Z, which is directed opposite to the pressing force F.sub.A.