Abstract: A seal device includes a first resilient seal ring having a first resilient seal portion and first and second seal portions; and a second resilient seal ring. The first resilient seal portion urges a first seal surface of the first seal ring against the second seal surface of the second seal ring. The second seal portion mates with the first retainer portion of the first seal ring, while the first seal portion is in a sealing relation with one component. The second resilient seal ring has a second resilient seal portion, and first and second seal portions. The second resilient seal portion urges a second seal surface of the second seal ring against the first seal surface of the first seal ring, while the second seal portion mates with the second retainer portion of the second seat ring.

Abstract: A mechanical end face seal comprising two relatively rotatable seal rings, a resilient bellows for providing a secondary seal between one seal ring and either a housing or a rotating shaft and a finger spring element nested in the bellows. The resilient bellows comprises an elastomeric material, such as molded rubber, and has a single convolution having a general cross-sectional shape of an inverted “Omega.” The finger spring member comprises a plurality of generally “U” shaped spring fingers which provide the axial biasing force to urge the ring faces in sealing relation. In a preferred embodiment, the spring includes ferrules for providing radially inward force on a flange portion of each end of the bellows to maintain the secondary seal.

Abstract: A gas turbine engine aspirating face seal includes rotatable and non-rotatable engine members and a leakage path therebetween. Annular generally planar rotatable and non-rotatable gas bearing face surfaces are operably associated with the rotatable and non-rotatable engine members respectively and are circumscribed about and generally perpendicular to a centerline axis. A substantially fully annular pull off biasing element is operably disposed for urging the non-rotatable gas bearing face surface axially away from the rotatable gas bearing face surface and circumscribed about the centerline axis. The pull off biasing element may be at least one wave spring or one bellville washer. The non-rotatable gas bearing face surface may be on a face seal ring mounted on a translatable cylindrical piston which is axially movable and supported by the non-rotatable engine member.

Abstract: An atmospheric seal assembly for sealing the junction between a rotating tube kiln and a stationary hood comprises a multiplicity of spring-loaded cam follower clamping devices pressing a stationary graphite ring, extending from the hood, against a flange on the rotating tube kiln to provide a rotary seal by slidable contact between the rotating flange and the graphite ring and a second, flexible, seal extending from the hood to the first seal.

Abstract: A mechanical end face seal comprising two relatively rotatable seal rings, a resilient bellows for providing a secondary seal between one seal ring and either a housing or a rotating shaft and a finger spring element nested in the bellows. The resilient bellows comprises an elastomeric material, such as molded rubber, and has a single convolution having a general cross-sectional shape of an inverted “Omega.” The finger spring member comprises a plurality of generally “U” shaped spring fingers which provide the axial biasing force to urge the ring faces in sealing relation. In a preferred embodiment, the spring includes ferrules for providing radially inward force on a flange portion of each end of the bellows to maintain the secondary seal.

Abstract: A face seal device for use with components rotating at a high rotational speed includes a non-rotating face seal ring (5) and a rotary face seal ring (11). The rotary face seal ring is mounted in a loose fit for common rotation with a rotating component and includes a sealing face (6) which, in operation, is essentially radially aligned for cooperation with an opposite sealing face (16) of the non-rotating face seal ring. A heavy-mass-contributing element (22) is arranged to rotate in common with the rotating component and engages a portion of the rotary face seal ring. The center of gravity of the heavy-mass-contributing element is axially spaced from that of the rotary face seal ring, whereby, in operation, a torque directed towards the non-rotating face seal ring is applied to the rotary face seal ring. This torque arises from the centrifugal forces that correspond to the mass-contributing element and the spacing between the centers of gravity.

Abstract: A seal apparatus for a jet pump slip joint in a boiling water nuclear reactor pressure vessel, in an exemplary embodiment, includes a split seal ring and a segmented diaphragm spring engaging the split seal ring at an inner circumference of the diaphragm spring. The diaphragm spring includes a plurality of latch assemblies spaced circumferentially around an outer circumference. A plurality of slots, spaced circumferentially around the inner circumference, extend from the inner circumference to the support portion. Each latch assembly includes a latch bolt extending through and threadendly engaging a corresponding latch bolt opening in the diaphragm spring. Each latch bolt includes a head and a plurality of ratchet teeth spaced around the periphery of the latch bolt head. A locking spring is positioned to engage the ratchet teeth of the latch bolt head. The latch assembly further includes a latch arm coupled to the latch bolt. The latch arm includes a slot sized to receive a diffuser guide ear.

Abstract: A rotary seal assembly is comprised of a collar adapted to be fixedly mounted on a shaft, the collar including a plurality of through going apertures parallel to the axis of the shaft. Drive fingers are slideably mounted within the bores of the collar, an inner end of the fingers being fixed to a pusher ring shiftable toward and away from the collar. The outer end of the fingers extend through complemental apertures formed in a containment ring into a rotary seal component. Springs are biased between the containment ring and drive collar to urge the fingers axially into aligned bores formed in a rotary seal member.

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: A mechanical face-type seal assembly which provides substantially annular, axially biasing force along the annular seal created between the rotary seal face and the stationary seal face of the seal assembly. The device preferably employs a substantially annular segment of interconnected canted coils in conjunction with a cartridge-type configuration to provide substantially annular, axial biasing force to the rotary and stationary seal faces, while also providing an improved configuration for maintaining the sealing rings and interconnected canted coils in axial alignment and installing the entire assembly as a single cartridge on a variety of applications.

Abstract: The invention provides a mechanical face seal for rotary rock bits with a novel coil spring energization system that prevents yielding of the coil springs in extreme torque conditions. Within at least one of the coil springs is a cylindrical pin designed to co-act with the spring such that the combination becomes very stiff in the radial direction as the spring extends beyond a certain amount. This prevents the high torque from yielding the springs. When the spring returns to its normal extension, the pin does not interfere with the axial compression of the spring. This combination allows the coil spring energizers of a rotary rock bit mechanical face seal to survive the occasional extreme torque event.

Abstract: In a metal to metal face seal assembly, a metal ring seal has a J-shaped cross-section with the hook portion of the ring seal forming an annular notch which receives and restrains a resilient load ring.

Abstract: A device for coupling a coolant duct of a rotating part, especially for a back-up or transport rollers, includes a hollow resilient compensator device fixedly connected to a journal of the rotating part, wherein the journal comprises a bore hole for conducting a coolant and is insertable in a bearing of a stationary part. A second end of the compensator is connected to a first sealing ring. The compensator is enclosed by a receptacle sleeve which includes a second sealing ring that creates a sealin contact with the first sealing ring. The receptacle is connected to the stationary part at an adjustable distance wherein a pretensioning exerted on the compensator by the receptacle sleeve via the first and second sealing rings is adjustable in response to a distance of the receptacle sleeve from the stationary part.

Abstract: A sliding ring seal includes a counter ring and an adjusting ring configured as a buttress. The counter ring and the adjusting ring are interconnected in a manner that does not allow for relative rotation, and they enclose a shaft to be sealed, also in a manner that does not allow for relative rotation. At least one sealing ring made of an elastomeric material seals the counter ring and the adjusting ring with respect to each other and with respect to the shaft. A sliding ring is joined to a housing and is sealed with respect thereto by means of at least one further sealing ring. The sliding ring is joined to the housing in an axially resilient manner that also does not allow for relative rotation. The counter ring and the sealing ring respectively include sealing surfaces that contact one another sealingly under an elastic preload. The sealing rings are arranged, sealingly and under the elastic preload, in a corresponding installation space.

Abstract: A rolling cutter drill bit has at least one roller cutter mounted on a cantilevered bearing shaft with a sealed bearing and lubrication system, lubricant pressure balancing means, lubricant pressure relief means, and a volume compensating rigid face seal assembly axially movable through an operating range. The face seal assembly comprises two cooperating face seal rings, one ring mounted on the bearing shaft and the other ring mounted in the cutter; a first energizer for the seal ring mounted on the bearing shaft, having a stiffness K1; and a second energizer for the seal ring mounted in the cutter, having a stiffness K2. In order to minimize the variation in the sealing face force as the assembly moves through its operating range, the stiffness K2 is less than half, and preferably less than 0.2, of the stiffness K1.