Abstract: Low-torque sliding components have sliding surfaces rotated relative to each other with an annular mating ring and an annular seal ring facing each other. The sliding surface of at least one of the mating ring and the seal ring has therein a plurality of multi-stepped recess portions formed in a circumferential direction. Relative rotation and sliding of the mating ring and the seal ring causes the multi-stepped recess portions to generate a dynamic pressure, and the multi-stepped recess portion is formed in a stepwise shape in a cross-sectional view by a dynamic pressure recess portion and a static pressure recess portion with the dynamic pressure recess portion surrounding the static pressure recess portion deeper than the dynamic pressure recess portion.

Abstract: A hydrodynamic sealing component includes a land portion and a plurality of hydrodynamic grooves. The hydrodynamic sealing component may include sets of shallow grooves and deep grooves. In embodiments, the hydrodynamic sealing component may include alternating shallow grooves and deep grooves, or alternating pairs of shallow grooves and pairs of deep grooves. In embodiments, a hydrodynamic sealing component may include at least three sets of hydrodynamic grooves, wherein each set of hydrodynamic grooves may have a different depth, which may be configured to create or maintain hydrodynamic forces over a different operational range. In embodiments, a hydrodynamic sealing component may have a surface area of lands-to-grooves is 1:1 or less. A sealing assembly, which may include a rotor with hydrodynamic grooves on a sealing surface, is also disclosed.

Abstract: A tool includes a friction stir welding (FSW) tool, a first body, a second body, and a plurality of biasing elements. The FSW tool has a rotational axis. The first body is rotationally fixed relative to the FSW tool and the second body is rotational fixed relative to the FSW tool. The plurality of biasing elements is positioned longitudinally between at least a portion of the first body and at least a portion of the second body.

Abstract: A rotary end face seal assembly to seal a fluid under pressure includes a pair of annular mating ring seal faces with one of the faces defining a sealing interface between radially inner and radially outer peripheral edges. A plurality of hydro-pad recesses are formed radially inwardly from the peripheral edge of one of the seal faces at the pressure side of the seal assembly at peripherally spaced intervals and a plurality of feeder grooves are formed radially inwardly from the same peripheral edge of the seal face between at least some hydro-pad recesses. The radial extent of the feeder grooves is longer than the radial extent of the hydro-pad recesses. In one form a feeder groove is disposed between adjacent hydro-pad recesses. In another form a feeder groove is disposed between adjacent pairs of hydro-pad recesses.

Abstract: A mechanical seal includes: a rotation-side member and a seal case positioned and fixed to each other, and in which the engaged state can be released by bringing the rotation-side member and the seal case closer to each other in the axial direction.

Abstract: Seal assemblies for use with fluid valves are described. An example apparatus includes a cage; a plug including a seal gland; and means for sealingly engaging an inner surface of the cage at least partially positioned in the seal gland and including a first portion and a second portion, in response to a fluid acting on the first portion in a first direction, the first portion to engage, outwardly urge, and splay the second portion to sealingly engage the cage, in response to the fluid acting in a second direction, the second portion to deter the fluid from acting on the first portion, the first direction opposite the second direction.

Abstract: One exemplary embodiment of this disclosure relates to a gas turbine engine. The engine includes a compressor section, a combustor section, a turbine section, and at least one rotatable shaft. The engine further includes a bearing assembly including an inner race, an outer race, and a plurality of rolling elements. A seal assembly is also included. The seal assembly includes a seal plate mounted for rotation with the rotatable shaft. The seal plate establishes a boundary of a tortuous passageway.

Abstract: A seal assembly is provided that extends along an axial centerline, and includes a rotor seal element that engages with a stator seal element. The rotor seal element extends radially between an inner element side and an outer element side, and includes a channel, a plurality of first passages and a plurality of second passages. The channel extends radially into the rotor seal element from the inner element side. The first and the second passages are fluidly coupled with the channel. Each of the first passages extends radially through the rotor seal element to a respective first passage outlet. Each of the second passages extends axially through the rotor seal element to a respective second passage outlet.

Abstract: A pumping ring 46 producing an axial flow of sealed flow is secured to a rotary shaft 6 at an axial position different from a rotary ring 56 so that the sealed fluid positioned in the sealed space 33 flows along the axial direction of the rotary shaft 6. A discharge hole 14 is formed on an inner circumferential surface of a seal cover 8 positioned in the downstream side of the axial flow of the sealed fluid resulting from a rotation of the pumping ring 46. An inflow hole 15 is formed in the upstream side of the axial flow of the sealed fluid resulting from the rotation of the pumping ring 46, so that the sealed fluid discharged from the discharge hole 14 returns to the inside of the sealed space from the inflow hole 15.

Abstract: An arrangement having an annular seal extending about a machine axis, and a vessel for sealing an L-shaped gap extending along a circumferential direction between a main vessel body and a cover is provided. A radial section of the gap extends in the radial direction and circumferential direction, and an axial segment extends in the axial direction and the circumferential direction. A sealing chamber is provided in the region where the radial segment and the axial segment intersect, the chamber expanded radially and axially relative to the adjacent gap segments. A seal is disposed in the sealing chamber, and a greater pressure is present in the radial segment than in the axial segment, the pressure differential sealed by means of the seal. The seal includes a support ring disposed radially inward made of a first material, and a jacket element made of a second material.

Abstract: An annular sliding member which is used in a mechanical seal, is attached to a rotating shaft, and slidably comes into contact, by being applied with energizing force in the axial direction, with another annular sliding member attached to a housing, wherein the sliding surface which comes into contact with the other sliding member is formed from: a dynamic pressure generating groove which guides a fluid to be sealed from a region to be sealed to the side of a region to not be sealed of the sliding surface, and a concave-convex section configured from a plurality of minute grooves which have a shallower depth than the dynamic pressure generating groove.

Abstract: A method of operating a rotary beverage bottle or container filling or handling machine with a bearing with a cleaning arrangement in an aseptic clean room in a beverage bottling or container filling plant. The abstract of the disclosure is submitted herewith as required by 37 C.F.R. §1.72(b). As stated in 37 C.F.R. §1.72(b): A brief abstract of the technical disclosure in the specification must commence on a separate sheet, preferably following the claims, under the heading “Abstract of the Disclosure.” The purpose of the abstract is to enable the Patent and Trademark Office and the public generally to determine quickly from a cursory inspection the nature and gist of the technical disclosure. The abstract shall not be used for interpreting the scope of the claims. Therefore, any statements made relating to the abstract are not intended to limit the claims in any manner and should not be interpreted as limiting the claims in any manner.

Abstract: A seal designed for insertion between a rotating shaft and a fixed casing having an opening through which the shaft is fitted, the seal having a sleeve designed to fit onto the shaft; a first sealing ring fitted to the sleeve; a cup designed to fit inside the opening; and a second sealing ring connected to the cup by a bellows of elastomeric material; the first and second sealing rings cooperate frontally with each other under the axial load exerted by a spring interposed between the cup and the second sealing ring; and the bellows is connected in angularly free manner to the cup to prevent self-induced torsional oscillation and noise resulting from it.

Abstract: A mechanical seal is disclosed having a rotatable sealing face and a stationary sealing face that are in opposed relation and arranged to be urged, into contact to form a seal. One of the sealing faces is mounted on a support assembly that includes a biasing device operative to move that sealing face into contact with the other sealing face. In one form of the invention, the biasing device includes one or more resilient members that in use are deformed to provide the biasing force. In a second form of the invention, the support assembly forms part of a fluid barrier of the seal and the biasing device is fluid impervious and forms part of the barrier. In a third form of the invention, the biasing device is exposed to fluid pressure in the chamber and the biasing force increases on increasing the fluid pressure in the chamber.

Abstract: The invention relates to a sealing system, in particular for sealing pump shafts of vertically arranged pumps for conveying for example liquefied natural gas (LNG) or other cryogenic fluids below ?80° C. The sealing system has a mechanical seal arrangement which is flowed through by a barrier fluid at a barrier fluid pressure. The mechanical seal arrangement prevents an exiting of a sealing fluid from a sealing chamber, wherein the barrier fluid pressure is higher than a sealing fluid in the sealing chamber. To allow a sealing system which can be manufactured inexpensively and is particularly simple to handle, it is proposed in accordance with the invention that a piston rod of a barrier fluid pressure device required for the setting of the barrier fluid pressure is arranged at least partly outside a cylinder. The cylinder can thus be made short and thus light weight and inexpensively.

Abstract: A mechanical seal is disclosed having a rotatable sealing face and a stationary sealing face that are in opposed relation and arranged to be urged, into contact to form a seal. One of the sealing faces is mounted on a support assembly that includes a biasing device operative to move that sealing face into contact with the other sealing face. In one form of the invention, the biasing device comprises one or more resilient members that in use are deformed to provide the biasing force. In a second form of the invention, the support assembly forms part of a fluid barrier of the seal and the biasing device is fluid impervious and forms part of the barrier. In a third form of the invention, the biasing device is exposed to fluid pressure in the chamber and the biasing force increases on increasing the fluid pressure in the chamber.

Abstract: Screw type liquid ring pump including a pump housing (9) with an inlet part (3) and an outlet part (11) and rotating helical screw rotor (8) inside the housing. The rotor is connected with a shaft (7) as well as a driving unit in the form of motor, preferably an electric motor (2), whereby the pump (20) with the pump housing (9) represents an elongation of the motor (2) with the motor housing thus representing an integrated or one piece unit. The shaft seal (22, 23) is provided wholly or partially in an annular space (24) provided within the rotor (8), whereby one end of the seal rests against an annular part (25) of the screw rotor provided in the annular space (24) between the rotor and the shaft, and its other end is tightly engaged against an inwardly protruding part (21) at the outlet end of the pump.

Abstract: A slide ring seal arrangement comprises a rotationally fixed slide ring (4) and a slide ring (11), which is provided for rotating together with a rotating component, these slide rings each being held in a loose seat and interacting, in, in essence, radially oriented sealing surfaces, which are prestressed with a main prestressing force while in contact with one another. Each slide ring, on its front face that faces away from the sealing surface, is axially supported on a supporting part (14, 17) via an annular bearing surface (16, 20) provided between the respective supporting part and the adjacent front face of the respective slide ring. A load ratio (d12?dH2)/(d12?d22) of =2.0, preferably between 0.8 and 2.0, preferably no greater than between 1.0 and 1.5, more preferably approximately 1.3 is maintained on the bearing surface (16, 20). The measurement (d1?d2) of each bearing surface (16, 20) is equal to =10 mm, preferably between 0.2 and 2.0, preferably no more than approximately 0.6 mm.

Abstract: Apparatus for creating a seal between an axle journal and a bearing housing is disclosed, particularly for use in apparatus for dewatering or washing material suspensions. The apparatus includes a stator ring, a pair of diagonally disposed guide pins supporting the stator ring with respect to the bearing housing so that the stator ring can be angled in a plane with respect to the pair of guide pins, a sealing ring for creating a seal between the stator ring and the axle journal, a bellows for creating a seal between the bearing housing and the stator ring, and at least one resilient member for urging the stator ring in abutment against the sealing ring.

Abstract: The invention provides a seal for a rotatable shaft. The seal includes an inner case mountable to the shaft and having a body and first and second flanges extending radially outward from the body. The seal includes first and second sealing discs operable to seal against the first and second flanges of the inner case. The sealing discs are immovably associated with a housing spaced from the shaft. A spring encircles the shaft and inner case to urge the sealing discs against the flanges. The spring rate of the spring is controlled to enhance sealing, reduce turning torque, and extend life of the seal.

Abstract: A mechanical seal assembly to be used in sterile applications comprises a pair of co-operating seal rings (2, 5), one of which is held rotationally fixed and the other of which is provided to rotate together with a rotating component, wherein one of the seal rings is axially movable and biased by a spring against the other seal ring, a retainer housing (1) at which the rotating seal ring is retained near an axial end thereof, a mounting member (12) which may be mounted rotationally fixed at the rotating member, and a rotatory force transmission device (10) for transmitting a rotatory force between the mounting member and the retainer housing. The rotatory force transmission device (10) comprises a transmitting ring (15) retained in press-fit at the retainer housing (1) near the other axial end thereof, the transmitting ring including at least one protruding engagement member (20) engaging in an aligned recess in the mounting member.

Abstract: A shaft-sealing device includes a seal cover (3) attached to a pump housing (2) in which a rotary shaft (1) is mounted. The seal cover (3) includes a shaft-sealing section (381) and a coolant outlet (326) intersecting the shaft-sealing section (381) at an opening (329). A fender (34) projects from a side (328) of a circumference of the opening (329) into the shaft-sealing section (381). The fender (34) has a side face (340) facing the opening (329) and guiding a coolant into the coolant outlet (326) through the opening (329) when the coolant fed into the shaft-sealing section (381) flows through the opening (329) and encounters the side face (340). A shaft sleeve (4) extends through the seal cover (3) and is mounted around the rotary shaft (1) to rotate therewith. A pumping ring (6) is mounted in the shaft-sealing section (381) and securely mounted around the shaft sleeve (4).

Abstract: A concentric multi-shaft assembly (1) comprises a casing (2), a hollow outer shaft (3) that is freely rotatable in the casing, an inner shaft (4) that is freely rotatable in the outer shaft (3) and independently of the outer shaft, an outer shaft seal arrangement (16, 19, 20, 21) sealing between the casing and the outer shaft and an inner shaft seal arrangement (24, 25, 27, 28) sealing between the outer shaft and the inner shaft. The outer shaft seal arrangement includes a spring seat (6) supported by the casing (2) such that it does not rotate when, in use, the outer shaft rotates. The inner shaft seal arrangement comprises a spring seat (8) that is supported by the inner shaft such that it is rotatable with the inner shaft.

Abstract: A sealing device has a seal ring and a cylindrical bellows portion connected to the seal ring. The cylindrical bellows portion has a corrugated outer surface. A turbocharger utilizing the sealing device has a turbine wheel connected to a shaft and a compressor wheel connected to the shaft. The sealing device is sealingly engaged with the shaft. The sealing device provides a seal between a bearing housing of the turbocharger and either a turbine housing or a compressor housing.

Abstract: The invention provides a seal for a rotatable shaft. The seal includes an inner case mountable to the shaft and having a body and first and second flanges extending radially outward from the body. The seal includes first and second sealing discs operable to seal against the first and second flanges of the inner case. The sealing discs are immovably associated with a housing spaced from the shaft. A spring encircles the shaft and inner case to urge the sealing discs against the flanges. The spring rate of the spring is controlled to enhance sealing, reduce turning torque, and extend life of the seal.

Abstract: A jet pipe assembly containing at least one joint provided with a seal assembly to isolate, substantially, the fluid flowing in the pipe from the fluid external to the pipe. The dynamic member of the seal assembly is provided with both radial and cylindrical sealing surfaces.

Abstract: A seal assembly has simple assembly structures, and provides secure sealing effects. A crawler-track connection structure allows the seal assembly to be easily mounted, and securely prevents overflow of a lubricant and the like to the outside. A pair of seal rings (1) and (1) individually having lip portions (23) and (23) are disposed such that each of the lip portions (23) and (23) protrudes in a direction opposing an axial direction, and a load seal ring (2) is compressed and inserted between the pair of seal rings (1) and (1). The load seal ring (2) exerts reaction forces on the pair of lip portions (23) and (23) outwardly in the axial direction.

Abstract: A mechanical seal of the invention includes relatively rotatable seal rings and a secondary seal therefore. The secondary seal is a C-shaped spring loaded gasket having upper and lower gasket legs. The gasket is provided between two of the seal components, for example, between an axially movable seal ring and a bellows flange. The gasket has one leg thereof confined axially to transmit axial loads between the seal ring and the bellows flange. Also, the upper and lower gasket legs are biased axially apart by a spring to permit radial movement between the seal ring and the bellows flange and also accommodate different rates of thermal expansion between the seal ring and bellows flange.

Abstract: According to a preferred embodiment, a mechanical face seal assembly comprises four generally ring-shaped members and plural spring devices. The first ring-shaped member is directly fastened (e.g., bolted) to the flanged structural section located at the end of the shaft sleeve. The first and second ring-shaped members are coaxially aligned and rotatively communicative at respective radial surfaces. The first ring-shaped member is made of a metal (or ceramic) matrix composite material. The second ring-shaped member is made of a polymer matrix composite material. The second and third ring-shaped members are mated via radial openings (in the second ring-shaped member) and corresponding radial projections (in the third ring-shaped member). The third ring-shaped member has axial projections and is thereby directly fastened (e.g., bolted) to the fourth ring-shaped member, which clampingly secures the third ring-shaped member with respect to the shaft.

Abstract: A mechanical seal including a slide ring and a counter-ring that are axially preloaded against each other along sealing surfaces through the application of spring tension. These surfaces contact each other in a manner that permits the sealing surfaces to rotate relative to each other. The slide ring and a housing, which is arranged in a rotatably fixed manner relative to slide ring, are each sealingly allocated to one end face of a bellows extending in the axial direction. One of the end faces of bellows is allocated nonadherently, with force-locking and/or form-locking, to slide ring, and the other end face of bellows is allocated nonadherently, with force-locking and/or form-locking, to housing.

Abstract: A Non-contacting face type pressure sealing assembly for shafts rotating at high speeds, such as for example those of centrifugal compressors, such assembly having at least two mating sealing rings. One of the subject sealing rings is fixed to the rotating shaft. The other is non-rotating but typically biased by coil springs and allowed to slide within the seal housing in the axial direction. Non-rotating sealing ring is sealed at the housing by an arrangement of two elastomeric elements, one a sealing O-ring the other a compliant force transmitter. Compliant force transmitter can also be an O-ring or it can be an element triangular in cross-section. Angular contact between the two elements maintains transmission of the axial coil spring load towards the non-rotating ring, but also derives a radial load needed for low friction contact at the sealing O-ring.

Abstract: This invention relates to a seal apparatus for providing sealing engagement between a vessel and a rotatable shaft extending through a wall of the vessel. An insert retainer is connected with respect to the vessel and around and apart from the rotatable shaft. A shaft ring is connected to the rotatable shaft and rotatably positioned within the insert retainer. An insert is biased against the shaft ring and seated at least partially within the insert retainer. A retainer assembly is connected to the insert retainer and preferably biases the insert against the shaft ring. Seals, such as O-rings, may be placed around the circumference of the insert and/or around the interior of the shaft ring to further effectuate a seal between the vessel and the rotatable shaft.

Abstract: The invention is a mechanical seal assembly for use between a stationary body and a rotating shaft. The seal assembly includes a stationary element, a rotating biasing element and a rotating tensioning element. The rotating biasing element is sealed to the rotating shaft utilizing an o-ring seal. The tensioning member is rigidly mounted to said shaft using an interference fit backed up by set screws or the equivalent. The stationary assembly is centered about the shaft and rigidly fastened to the stationary body. Either the stationary element or the rotating follower element may hold packing in a radial packing groove, as a sealing medium. An axial biasing force provided by coil springs (or other compressive means) on the periphery of the rotating follower plate and secured by the rotating tensioning element insures intimate contact of the packing medium to the stationary element and rotating biasing element sealing face, thus providing a fluid tight seal.

Abstract: An apparatus for sealing a rotary tube drum of a furnace to another furnace component. Two concentric resilient metal ring segments are provided on a disk to comprise the sealing elements of the present invention. A plurality of springs arranged as a ring apply pressure to the disk and ring segments to ensure a consistent and self-adjusting seal between the joined components. Links located circumferentially about the disk limit lateral movement, yet allow axial movement, of the seal. It is thereby possible, according to the present invention, to provide a resilient seal between a rotary tube and another component of a furnace that yields a self-adjusting gas-impermeable seal between the mating components.

Abstract: A sealing device comprises a slide ring and a counterring having sealing surfaces, the slide ring and counterring contacting one another under axial prestressing in a sealing manner and capable of rotating relative to one another, the counterring and a substantially L-shaped engaging ring being interconnected, the engaging ring being affixed to a shaft to be sealed, and the counterring and the engaging ring being sealed relatively to each other by a sealing ring. The counterring contacts a radial segment of the engaging ring and surrounds an axial segment with radial clearance, and the sealing ring is sealingly arranged, under elastic prestressing, in the gap formed by the clearance. The counterring has an inner peripheral surface which forms an angle .alpha. of about 0.5.degree. to about 60.degree. with an axis of rotation, and the radial clearance in which the sealing ring is arranged is greater on the side facing the radial segment of the engaging ring than on the side facing the slide ring.

Abstract: A slide ring seal assembly includes a slide ring member and a counterring member adjoining the slide ring member in axial alignment therewith. A force-exerting arrangement which axially resiliently presses the two ring members to one another includes a first resilient sealing ring being coaxial with and engaging one of the ring members; and a second resilient sealing ring being coaxial with and engaging the other of the ring members. The first and second sealing rings are in a radial alignment with one another and are stressed by clamping arrangements, so that the sealing rings exert axial forces on the two ring members, pressing them together. At least the first sealing ring and the first clamping arrangement are so designed that the axial restoring force generated by virtue of the deformation of the first sealing ring seeks to reduce the axial dimension of the resiliently deformed first sealing ring. Such an axial restoring force constitutes the axial pressing force exerted by the first sealing ring.