Abstract: A slide ring seal arrangement including a rotating slide ring (2), a static slide ring (3) and a preload device for preloading at least one of the slide rings, wherein the preload device includes a spring washer (7) with a basic body (70), with at least one spring bar (71) and with at least one engagement region (72) provided on the end of the spring bar (71), wherein the spring bars (71) run in the circumferential direction of the spring washer (7), and wherein the engagement region (72) is in engagement with a recess (30) provided on the slide ring in order to exert on the slide ring a preload force (F) acting in the axial direction (X-X).

Abstract: A mechanical face seal including a primary ring which is axially movably mounted, and a mating ring (3, 3?, 3?), wherein the primary ring and a mating ring each comprise adjoining sealing surfaces. The primary ring is pressed by a spring against the mating ring. The spring has a bellows-like shape. The spring is made out of an elastomer. The mechanical face seal achieves a small installation space for a mechanical face seal.

Abstract: A mechanical face seal is provided that surrounds a shaft that is to be sealed, the mechanical face seal includes a stationary seal ring wherein the shaft is integral to the mechanical face seal, is configured in one piece, makes a transition to the stationary seal ring and includes the same material as the ring.

Abstract: An axial plain bearing assembly includes a thrust ring provided for common rotation with a rotary component. The thrust ring has a radial seal face on an end face thereof for co-operating with a radial seal face of a non-rotational seal ring of a gas-lubricated mechanical face seal assembly for sealing said rotary and stationary components against each other. A plurality of peripherally spaced gas-pumping grooves is formed in at least one of the radial seal faces of the thrust and non-rotational seal rings. A mass ring connected with the thrust ring is provided at an axial distance from the thrust ring. The mass ring is configured and adapted to exert a balancing force on the thrust ring under centrifugal forces acting on the mass ring during common rotation of the mass and thrust rings to compensate for thermal distortion of the thrust ring during operation.

Abstract: An arrangement of a shaft with a slip-ring seal mounted thereon is disclosed. The slip-ring seal (3) comprises a pair of cooperating slip rings (4,5), the sealing faces of which define a sealing gap (6) between them. One of the slip rings is mounted on the shaft (2) with torque transmission from a drive element (9) mounted on the shaft, whilst the other slip ring is provided for fixed mounting on a stationary component. The arrangement is characterised in that the drive element (9) comprises a tubular drive housing (11), extending over the external circumference of the slip ring (4) with a radial gap (12) and a passage (13) for introduction of a flow medium is provided, opening out at one end in a chamber (A), defined by the drive housing (11), which drains out through the radial gap (12), whereby the radial gap forms a flow path for the flow medium which terminates at or near the sealing gap (6).

Abstract: An arrangement of a shaft with a slip-ring seal mounted thereon is disclosed. The slip-ring seal (3) comprises a pair of cooperating slip rings (4,5), the sealing faces of which define a sealing gap (6) between them. One of the slip rings is mounted on the shaft (2) with torque transmission from a drive element (9) mounted on the shaft, whilst the other slip ring is provided for fixed mounting on a stationary component. The arrangement is characterised in that the drive element (9) comprises a tubular drive housing (11), extending over the external circumference of the slip ring (4) with a radial gap (12) and a passage (13) for introduction of a flow medium is provided, opening out at one end in a chamber (A), defined by the drive housing (11), which drains out through the radial gap (12), whereby the radial gap forms a flow path for the flow medium which terminates at or near the sealing gap (6).

Abstract: An axial plain bearing assembly includes a thrust ring provided for common rotation with a rotary component. The thrust ring has a radial seal face on an end face thereof for co-operating with a radial seal face of a non-rotational seal ring of a gas-lubricated mechanical face seal assembly for sealing said rotary and stationary components against each other. A plurality of peripherally spaced gas-pumping grooves is formed in at least one of the radial seal faces of the thrust and non-rotational seal rings. A mass ring connected with the thrust ring is provided at an axial distance from the thrust ring. The mass ring is configured and adapted to exert a balancing force on the thrust ring under centrifugal forces acting on the mass ring during common rotation of the mass and thrust rings to compensate for thermal distortion of the thrust ring during operation.

Abstract: A mechanical face seal is provided that surrounds a shaft that is to be sealed, the mechanical face seal includes a stationary seal ring wherein the shaft is integral to the mechanical face seal, is configured in one piece, makes a transition to the stationary seal ring and includes the same material as the ring.

Abstract: A mechanical face seal assembly comprises at least a single pair of seal rings (4, 5) whose opposed seal faces (9, 10) are held together in sealing engagement, one of the seal rings is non-rotatable while the other is provided for rotation in common with a rotary component (2). The two seal rings are formed of a SiC material to which a graphite component is added for at least one of the seal rings. The graphite component is provided in particulate form in a proportion of between 1.0 and 4.0 Vol % in a SiC matrix material comprising SiC crystals having a grain size of between 5 and 1500 ?m. The grain size of the graphite particles amounts to between 20 and 200 ?m.

Abstract: A face seal device for sealing a shaft relative to a casing includes a pair of co-operating seal rings, one of said seal rings serving for non-rotational mounting on the casing and the other for common rotation with the shaft. The seal rings include bores through which the shaft is extended when in operation, and which are held in radial alignment with the shaft by a mounting member which can be inserted in the bores and withdrawn from engagement with the bores by an axial force which can be applied to the mounting member. The seal rings are held in the operational positional relationship of each other by a pair of axially spaced axial stops on the mounting member between which the seal rings are disposed. One of the stops engages the non-rotational seal ring and the other the rotating seal ring. The axial stop engaging the rotating seal ring is held radially resiliently.

Abstract: An axial plain bearing assembly includes a thrust ring provided for common rotation with a rotary component, and a counter ring provided for mounting non-rotationally on a stationary component. The thrust and counter rings comprise bearing surfaces facing each other, between which a friction-minimizing oil film can be formed during operation. The thrust ring further comprises a radial seal face on an end face thereof remote from the counter ring for cooperating with a radial seal face of a non-rotational seal ring of a mechanical face seal assembly for forming a seal between said thrust and non-rotational seal rings. Accordingly the thrust ring is multi-functional in that it provides for an axial support of the rotary component and simultaneously acts as a rotating seal ring of a mechanical face seal assembly.

Abstract: A biasing means of a face seal device for applying a bias force between a pair of co-operating seal rings includes a pair of axially spaced support elements and a bias spring disposed between and supported by said support elements. The support elements are axially movable relatively to each other. Protruding means are provided on one of said support elements, with which the other support element can engage for limiting the axial movement of the support elements in a direction away from one another. The protruding means are spaced from the one support element by an axial distance larger than a predetermined maximum axial operational spacing the support elements can occupy after installation of the biasing means on the face seal device, and smaller than the axial length of the bias spring in a relaxed state.

Abstract: A face seal device for sealing a shaft relative to a casing includes a pair of co-operating seal rings, one of said seal rings serving for non-rotational mounting on the casing and the other for common rotation with the shaft. The seal rings include bores through which the shaft is extended when in operation, and which are held in radial alignment with the shaft by a mounting member which can be inserted in the bores and withdrawn from engagement with the bores by an axial force which can be applied to the mounting member. The seal rings are held in the operational positional relationship of each other by a pair of axially spaced axial stops on the mounting member between which the seal rings are disposed. One of the stops engages the non-rotational seal ring and the other the rotating seal ring. The axial stop engaging the rotating seal ring is held radially resiliently.

Abstract: A face seal assembly comprises a pair of co-operating seal rings of which one is provided for mounting on a rotary component and the other on a stationary component. The seal rings have substantially radially aligned seal faces between which during operation a seal gap is provided for sealing a zone peripherally outward of the seal faces relative to a zone peripherally inward thereof. A plurality of peripherally spaced recesses effective for pumping a gas are provided in at least one of the seal faces, said gas recesses extending from one periphery of the seal face towards, but the of ends said recesses being radially spaced from, the other periphery thereof. A surface area ratio FGFA/FG g in a range between 0.35 and 0.65, preferably 0.4 and 0.6 is provided on the seal face having said gas recesses. FGFA is the total surface area of the gas recesses as a projection onto the seal face, and FG is the total surface area of the seal face.