Abstract: A piston ring is made from a copper-containing alloy. This material permits the top compression ring of a piston to be moved closer to the piston crown, reducing crevice volume and reducing the tendency for pre-ignition. Ignition timing advance can be realized by installing the rings and letting the ECU advance the timing as the sensors allow, increasing efficiency. Also, shorter pistons and longer connecting rods are possible. The shorter pistons reduces the reciprocated mass in the engine and the longer connecting rods reduce the frictional loss caused by radial forces pushing the piston against the liner. Both reducing volume and tendency for pre-ignition increase engine efficiency.

Abstract: A gasket is provided with a tacky polyurethane or polyurea gel body and a metallic mesh skeleton where the skeleton has been coated with a conversion coating. The conversion coating helps reduce corrosion in the gasket and corrosion on the parts that place the gasket under compression, especially where an environment conducive to galvanic corrosion is present. This gasket may then be used in assemblies which include aircraft parts, which parts may be subject to extreme environmental conditions.

Abstract: The present disclosure relates to advanced materials, particularly single crystal grain structures including the formation of single crystal grain structures. Single crystal grain structures offer improved mechanical properties when used with individual components. Improving mechanical properties is favorable for components that are used in applications with high temperature, pressure, and stress. In these applications, mechanical failure is extremely undesirable. Individual components, such as seals, can be designed with a single crystal grain structure in a preferred direction. By selecting a preferred direction, and orienting the single crystal grain structure accordingly, the single crystal grain structure can improve the component's mechanical properties. Single crystal grain structure seals and the method of forming the seals, therefore, offer various improvements to individual components, specifically when the components are designed for high temperature, pressure, and stress applications.

Abstract: A protection system for preventing foreign material from lodging in a channel between and/or damage to adjacent ceramic core features during a core processing operation is disclosed. The system includes a gasket sized and shaped to self-lock within the channel and prevent foreign material from lodging within the channel during the core processing operation. A method may include determining a geometrical characteristic of the channel and adjacent ceramic core feature; fabricating a gasket to fit and self-lock within the channel; positioning the gasket within the channel; and performing the core processing operation. The gasket prevents the foreign material from lodging in the channel, reducing subsequent damage to the ceramic core compared to the channel without the gasket.

Abstract: Peripheral sealing glands for forming a seal between an elongate member and a substantially flat surface are provided. One method includes providing an at least in part frustoconical shaped skirt through which the elongate member is to pass and defining a deformable upper seal configured to deform about and form a first seal to a periphery of the elongate member, providing a flange depending from a lower periphery of the skirt, and providing a substantially rigid ring structured to bear on the outer surface of the flange so as to apply a substantially consistent pressure to the two or more endless lip seals to form a second seal against the flat surface. The skirt includes a retention flange to removably receive the rigid ring and to permit adjustment of the rigid ring relative to the flange.

Abstract: The present invention relates to a resilient seal for sealing one or more gaps or joints. The seal includes an elongate strip having first and second portions. The first portion is configured in use to engage one or more internal surfaces defining the gaps or joints. The second portion is configured to substantially conform to the shape and configuration of the one or more gaps or joints so as to substantially fill the one or more gaps or joints when in use. The invention also relates to a method of sealing one or more gaps or joints using the resilient seal.

Abstract: A carbon seal assembly may comprise a seal support, a seal housing coupled to the seal support, and a carbon seal adjacent an aft portion of the seal housing. The carbon seal may comprise a nose defined by an axial surface of the carbon seal, a first radial surface of the carbon seal, and a second radial surface of the carbon seal radially inward of the first radial surface. The first radial surface and the second radial surface may extend forward from the axial surface. A first axial length of the first radial surface may be greater than a second axial length of the second radial surface.

Abstract: A sealing ring of a translationally adjustable component may include a ring body including at least one sealing lip, and a fibre-reinforced reinforcement ring configured to stiffen the ring body in a radial direction and limit a deformation of the at least one sealing lip in the radial direction. The reinforcement ring may be one of i) coupled to the at least one sealing lip, and ii) embedded into the ring body. The reinforcement ring may include laminated carbon fibres and have a modulus of elasticity E2. The ring body may be composed of a plastic having a modulus of elasticity E1. The sealing ring may also have a ratio of the modulus of elasticity E2 to the modulus of elasticity E1 (E2/E1) that is approximately 150 to 300.

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 face seal assembly includes a first and a second metallic sealing ring having a common center axis, and each including an outer ring surface and an inner ring surface. A non-metallic sealing element is positioned upon the outer ring surface. The metallic sealing ring also includes a sealing face facing an axially outward direction and extending circumferentially around the center axis in a path that varies from parallelism with a plane normal to the center axis. A stiffness relief groove extends inwardly from the inner ring surface and circumferentially around the center axis and forms an annular spring zone of reduced material thickness to compensate for the varying of the path of the sealing face. One machine system application includes a final drive in a ground-engaging machine.

Abstract: A temperature-robust polymer shroud for a roller bearing seal includes a shroud body and an inner diameter leg defining respective portions of a single continuous part. The shroud body encircles a rotation axis of the polymer shroud and extends predominantly in directions orthogonal to the rotation axis from an inner diameter to an outer diameter. The inner diameter leg connects to the shroud body at the inner diameter, encircles the rotation axis, and is oriented at an oblique angle to the rotation axis to extend both (a) radially inward from the inner diameter and (b) axially away from the inner diameter along a first direction parallel to the rotation axis. A roller bearing seal includes a seal case, an elastomer lip, and the temperature-robust polymer shroud.

Abstract: A seal comprises an annular portion having a static seal surface in contact with a first element and made of an elastomeric material. An annular lip exerts a dynamic seal in relation to a second element. A garter spring and a leaf spring cooperate to maintain the annular lip in an operating configuration abutting on a sliding surface of the second element, whilst an annular locking element holds in position the leaf spring.

Abstract: A non-metallic flange isolation gasket kit sealing flanged pipeline connections and flanged vessel connections while providing electrical isolation protection between flanges suited for high-pressure and high-temperature cathodic protection applications is presented. The invention protects flange faces from media induced corrosion and mitigates flange rotation induced fatigue and failures. The invention comprises of a retainer, a seal, and a seal pre-load structural ring. The seal pre-load structural ring is inserted into the seal, and seal outer diameter surface is joined to the retainer inner diameter surface. A second embodiment comprises of a composite gasket blank, comprising of a retainer and a seal, and a seal pre-load structural ring. The seal outer diameter surface and the retainer inner diameter surface are joined by thermal fusion bonding. The invention may further comprise one or more gasket seating stress stabilizers and/or a centering ring.

Abstract: A seal according to the present disclosure includes a plate, and a floating shoe supported with respect to the plate in a first direction. The floating shoe has a sealing feature extending in a second direction perpendicular to the first direction. At least one bearing is between the plate and the floating shoe. The bearing is configured to facilitate movement of the floating shoe with respect to the plate in the second direction. A gas turbine engine including the seal and a method of sealing a rotating component with respect to a stationary component are also disclosed.

Abstract: A gasket inserted into a gasket groove is formed of a gasket main body part positioned in the middle part thereof and first/second end face projection parts each formed in a tapered shape, projecting from corresponding ones of the ends of the gasket main body part. Each of pressure-contact surfaces of the gasket main body part is formed as an arc-shaped surface having a convex shape projecting toward a corresponding one of the inner side surfaces of the gasket groove. The rate of the sum of the sectional areas of the first/second end face projection parts to the whole sectional area of the gasket is 30% or less, and the rate of the curvature radius of each of the tip end surfaces of the respective first/second end face projection parts to the maximum width dimension of the gasket main body part is 15% or less.

Abstract: A compliant seal component, a turbomachine including such compliant seal component, and an associated method for cooling the compliant seal component disposed in the turbomachine are disclosed. The compliant seal component includes a convoluted portion and a plurality of end portions spaced apart from each other. The plurality of end portions is joined to the convoluted portion. An end portion of the plurality of end portions includes a first section and a second section, the second section defining a plenum. The end portion further includes a plurality of inlet holes and a plurality of outlet holes. The plurality of inlet holes is configured to direct a portion of a cooling fluid to the plenum. The portion of the cooling fluid in the plenum is configured to cool the end portion. The plurality of outlet holes is configured to discharge the portion of the cooling fluid from the plenum.

Abstract: A hydrostatic seal assembly for a gas turbine engine includes a shoe movable radially relative to a longitudinal engine axis. At least one beam supports radial movement of the shoe. A secondary seal is fixed relative to the shoe. A rail is attached to the shoe and in sealing engagement with the secondary seal. A gas turbine engine and a method of creating a seal with a hydrostatic seal are also disclosed.

Abstract: The present disclosure provides a sealing ring assembly having a sealing ring and a reinforcement, configured to seal a high-pressure region from a lower pressure region of a piston and cylinder device. The sealing ring may be segmented, and a metal layer, wire, or other reinforcement may be affixed to the ring. The reinforcement is placed into tension against the sealing ring, which is correspondingly placed into compression. The composite structure of a relatively brittle sealing ring and reinforcement provides for reduced tensile loads in the sealing ring, thus extending life and reducing the likelihood of failure. The brittle portion of the sealing ring assembly may include a polymer or ceramic such as graphite, which is relatively less strong in tension than compression.

Abstract: A seal device prevents sealing fluid on the inner-machine side from leaking to the outer-machine side between a housing and a rotating shaft inserted into a shaft hole on the housing. The seal lip is attached to the inner periphery of the shaft hole to slidingly contact the seal flange attached to the outer periphery of the rotating shaft. The thread groove, which exerts a fluid pumping action when the shaft is rotating, is provided on the seal flange so as to intersect with a lip end of the seal lip. The thread groove is formed so as to have a relatively small cross-sectional area in a sliding area in the seal flange that the seal lip comes in sliding contact with and have a relatively large cross-sectional area in an inner peripheral side area located on an inner peripheral side more than the sliding area.

Abstract: An object of the present invention is to provide a gasket capable of improving sealing performance by solving a non-uniform surface pressure distribution by a grommet structure. Provided is a gasket which is formed by laminating an upper layer, an intermediate layer, and a lower layer and is provided with a penetration hole and a seal bead formed at the upper layer and the lower layer to surround the penetration hole in a ring shape and to be symmetrical with respect to the intermediate layer in the vertical direction, in which the intermediate layer includes a fold-back portion, a surface pressure adjustment portion, and a bead contact portion, a plate thickness of the fold-back portion is thicker than that of the bead contact portion, and the surface pressure adjustment portion sets an upper step to be different from a lower step.