Abstract: The present invention provides a shaft-cylinder assembly for high-temperature operation comprising a pair of first and second dynamic sealing members having a helical coiled seal ring structure configured to be in contact with the shaft for providing dynamic sealing function in the cylinder; and a cylindrical cooling jacket configured to circumferentially surround the dynamic sealing members such that a cavity is defined between the dynamic sealing members inside the cooling jacket; wherein the cooling jacket comprises one or more inflow cooling channels and one or more outflow cooling channels configured to communicating with the cavity and circulating a cooling fluid through the cavity for moving heat away from the dynamic sealing members.

Abstract: A turbine ring assembly includes a ring support structure and a plurality of ring sectors made of CMC material and forming a turbine ring, each ring sector including an annular base with respective end portions having edges that are held facing an edge of the end portion of the annular base of a sector that is adjacent in the turbine ring. The assembly includes resilient holder devices for holding the ring sectors in position on the ring support structure, and each resilient holder device includes a spring element present beside the outside face of the ring support structure.

Abstract: A seal assembly includes a seal arc segment that defines radially inner and outer sides with the radially outer side including radially-extending sidewalls. A radially inner surface joins the radially-extending sidewalls. The radially-extending sidewalls and the radially inner surface define a pocket. A rail shield has radially-extending walls lines the radially-extending sidewalls.

Abstract: A seal assembly includes a seal arc segment that defines radially inner and outer sides. The radially outer side includes radially-extending sidewalls and a radially inner surface that joins the radially-extending sidewalls, with the radially-extending sidewalls and the radially inner surface defining a pocket. A rail shield has radially-extending walls that line the radially-extending sidewalls. A spring is configured to bias the rail shield radially inward.

Abstract: A system includes a circumferential lap joint between a downstream end of an outer wall of a turbine outlet and an upstream end of an outer barrel of a diffuser section, where the circumferential lap joint facilitates axial movement of the outer barrel relative to the outer wall, an upstream lip of the outer barrel is disposed radially within a downstream lip of the outer wall, and both the turbine outlet and the diffuser section are configured to receive an exhaust gas.

Abstract: A shroud retention system may generally include a shroud hanger and first and second hooked components extending from an outer hanger wall of the hanger. The first hooked component may include a first wall extending from the outer hanger wall and a first rail extending from the first wall. The second hooked component may include a second wall extending from the outer hanger wall and a second rail extending from the second wall. In addition, the system may also include a shroud segment having a shroud wall configured to be positioned radially between the outer hanger wall and the first and second rails. Moreover, the system may include a retention spring positioned within a radial space defined between the outer hanger wall and the first and second rails that is configured to apply a radial spring force against the shroud segment.

Abstract: A seal assembly for an exhaust duct section of a gas turbine engine includes a multiple of springs that axially extend from a split hoop opposite a seal surface.

Abstract: A fire seal for use with a gas turbine engine is provided. The fire seal includes a body comprising a first metallic sheet and a second metallic sheet adjacent thereto, each sheet having a plurality of segmented fingers, the segmented fingers of the first metallic sheet and the second metallic sheet overlapped such that the space between fingers on one sheet does not overlap the space between the fingers on the other sheet, at least one finger of the first sheet having at least one first flow aperture therein and at least one finger of the second sheet having at least one second flow aperture, the flow aperture of one sheet overlapping the flow aperture of the other sheet. A mesh material is configured to cover the at least one flow aperture of the two sheets, wherein the mesh material is configured to allow the passage of air therethrough.

Abstract: An electrode seal for use in a metallurgical furnace, the furnace comprising a furnace space heated by electrodes extending through an aperture into the furnace space. The electrode seal comprises at least three sets of shoes in consecutive lateral contact, each shoe having a biasing member for biasing a surface of the shoe toward one of the electrodes thereby allowing the one electrode to longitudinally move within the electrode seal while providing electrical insulation between the electrode and the aperture.

Abstract: A sealing arrangement for a gas turbine including exhaust and manifold diffusers separated by a circumferential diffuser gap. The sealing arrangement includes a forward clamp arrangement attached to the exhaust diffuser wherein the forward clamp arrangement includes a forward groove. The sealing arrangement also includes an aft clamp arrangement attached to manifold diffuser wherein the aft clamp arrangement includes an aft groove. Further, the sealing arrangement includes a flexible circumferential seal including forward and aft loop portions. The forward loop portion is located in the forward groove and the aft loop portion is located in the aft groove wherein the circumferential seal extends across the circumferential diffuser gap to seal the circumferential diffuser gap. The forward and aft loop portions are moveable in the forward and aft grooves to enable movement of the circumferential seal in a circumferential direction to accommodate thermal expansion of the exhaust and manifold diffusers.

Abstract: A thermal actuator for a rotating shaft shutdown seal that has a piston with a portion of its axial length enclosed within a cylinder shell with a material, such as a fusible link that changes state or deforms above a given temperature, interposed between a closed end of the cylinder and one end of the piston. The piston is spring biased toward the material and moves toward the closed end of the cylinder when the given temperature is reached and the deformation or change of state of the material makes room for the piston to move toward the closed end. Movement of the piston is transferred through a piston rod to activate the seal.

Abstract: An annular seal positionable in a gap is disclosed herein. The annular seal includes a plurality of leaves positioned about a center axis. Each leaf extends to a distal end that is elastically deflectable relative to the center axis to accommodate changes in a size of the gap. The annular seal also includes a ring encircling the center axis and at least partially interconnecting the plurality of leaves together for concurrent installation and removal. The annular seal also includes a plurality of tabs projecting from the ring along the center axis. Each of the tabs is directly connected to at least one of the plurality of leaves such that elastic deformation of one of the plurality of leaves induces bending in the corresponding tab before inducing bending in the ring.

Abstract: A sealing assembly is provided. The sealing assembly includes a foil disposed circumferentially around a rotating component and configured to provide primary sealing to the rotating component between high pressure and low pressure sides and a spring system disposed adjacent to the foil. The spring system includes a plurality of features to facilitate foil surface to follow excursions of the rotating component, wherein the plurality of features provide secondary sealing from the high pressure to the low pressure sides between the foil and a stationary component.

Abstract: A seal arrangement for sealing around a rotating shaft that passes through a ship bulkhead includes an expandible and contractible seal ring made of several seal ring segments, and radial actuators that engage the seal ring segments and can be power-activated, e.g. with a pressure medium, to pull the seal ring segments radially outwardly, thereby expanding the seal ring to a larger diameter spaced away from the shaft. When the radial actuators are not activated, the biasing force of springs contracts the seal ring segments to a smaller diameter, to establish sealing contact of the seal ring on the shaft. In normal operation a control unit activates the actuators, but if sensors detect a power failure or water in the ship, or a manual switching is triggered, then the seal arrangement contracts under spring force into the sealing condition with the seal rings sealing against the shaft.

Abstract: A sealing device (1) having: a slide ring (2) and a back ring (3). The sealing device (1) is configured to seal an annular gap between a housing having a shaft hole, and a shaft inserted through the shaft hole. The slide ring (2) has: a through-cut (22), comprising a circumferential cut (22A), and axial cuts (22B) extending from both ends of the circumferential cut, along the axial direction; and multiple parting lines (23A, 23B) formed on a surface of the slide ring (2). The parting lines (23A, 23B) are arranged so that the parting lines (23A, 23B) are not overlapped with the circumferential cut (22A) exposed at the junction surface of the slide ring (2) with the back ring (3), throughout the lengthwise direction of the circumferential cut.

Abstract: The invention is a sealing system that employs a unique array of offset components, including multiple seal rings, to provide an improved seal with enhanced functionality. In the preferred embodiment, a groove contains two canted-coil springs that are located in a side-by-side relation beneath a pair of expander rings that are also in a side-by-side relation. Located atop the expander rings are three seal rings that are similarly arrayed in a side-by-side relation. To prevent a leak path through the expander rings, a center one of the seal rings overlies the area between the two expander rings.

Abstract: The invention relates to a dry-running piston rod sealing arrangement (1) for sealing a piston rod (2) mounted in a longitudinally displaceable manner. The sealing arrangement comprises at least one sealing ring (5) having a sealing surface (5a), an actuator (7), a sensor (8), and a chamber ring (3) containing the sealing ring (5). The actuator (7) comprises an active connection in relation to the sealing ring (5), such that the sealing surface (5a) can be radially displaced in relation to the piston rod (2). The actuator (7) can be controlled according to a measuring value detected by the sensor (8).

Abstract: A divided piston rod gasket for use in Stirling motors and compressors comprises two segments, adjusts by sliding and achieves a long service life.

Abstract: Disclosed is a variable clearance packing ring arrangement including a packing ring, wherein the packing ring includes a sealing face. The variable clearance packing ring arrangement also includes an actuating arrangement internal to the packing ring.

Abstract: Aspects of the invention are directed to a sealing system for the interface between a combustor liner and transition duct. The system includes a spring clip seal. A first end of the spring clip seal operatively engages the inner peripheral surface of the transition duct. A second end of the spring clip seal is indirectly attached to the liner by an insert disposed therebetween. The spring clip seal can be attached to the insert by any kind of welding process that does not involve melting of the spring clip seal and the insert, such as fillet welding. The insert and the liner can be attached in a similar manner. Because fillet welds are relatively easy to cut, the spring clip, insert and liner can be separated without the need for cutting any of these individual components. Thus, the system can facilitate the repair, disassembly and reassembly of the interface.

Abstract: A device for float mounting a sealed housing around a rotating, deflecting shaft. A sealed housing is connected to a static part in such a way that it can yield radially as well as rotate around a shaft axis at least to a small extent.

Abstract: A carburetor for a scavenged two-stroke internal combustion engine has an enriched fuel-and-air mixing passage extending through a housing of the carburetor. Engaged to the housing is a body of an air flow modular assembly which carries a primary air flow passage which houses a butterfly-type control valve therein. The throttle valve of the fuel-and-air mixing passage is mechanically linked or cammed to the control valve of the air flow passage so that opening of the throttle valve soon after opens the control valve allowing additional air to enter and provide a leaner fuel-and-air ratio in the combustion chamber of the engine when running under load. The air flow modular assembly has a sealing-and-bearing assembly which eliminates air leakage from the surrounding environment along the shaft of the control valve and into the primary air flow passage. The sealing-and-bearing assembly has a bushing which inserts into a counter bore of a cylindrical bore which receives the rotating shaft of the control valve.

Abstract: In a gas turbine having a chordal hinge seal between an inner rail of each nozzle segment and an annular axially facing sealing surface of a nozzle support ring, a supplemental seal is disposed between the support ring and inner rail of the nozzle segment on a high pressure side of the chordal hinge seal. The supplemental seal includes a pair of sheet metal shims overlaid by a woven metallic cloth supported by a bracket secured to the nozzle support ring. The radially outer end of the cloth seal bears against a back side of the inner rail. The shims of the legs of the supplemental seal are slit along their distal margin and staggered in a circumferential direction relative to one another to provide flexibility and effective sealing engagement with the inner rail.

Abstract: A segmented labyrinth seal assembly and method according to which a plurality of arcuate segments extend around a rotating shaft with the shaft being engaged by a sealing portion of each segment, thus sealing against the movement of fluid in an axial direction along the shaft. An engagement member extends from one end of at least one segment and is adapted to engage the corresponding end of the adjacent segment. The engagement member is urged in a direction towards the corresponding end to apply a separation force between the ends, and the separation force is adjustable.

Abstract: A seal assembly for co-operation with a shaft comprising a seal member which, in use, in a first position, forms a seal against the shaft, a seal housing for retaining the seal member, means for applying a radially inward force to the seal member and means for applying a radially outward force to the seal member so that, when the means for applying a radially outwards force is operated, the seal member is dilated to a second position thereby enabling the seal assembly and the shaft to be fitted and disassembled in conventional manner, when the means for applying a radially outward force is removed the means for applying a radially inward force to the seal member returns the seal member to the first position.

Abstract: A split seal component including a seal face comprising two seal face segments rigidly mounted in two holder halves and methods of assembly and installation. The seal face segments may each have a nose that is held snugly by each holder half and is supported axially. Aligning pins received in aligning holes of the holder halves may be used to align the face segments. A fixture may be used to axially align the seal segments. A split o-ring and inner axial wall may be included that position the seal face concentrically with a shaft. Each holder half may have an integral band that clamps and also positions the face segments concentrically with the shaft. The walls of the holder halves may be stress-relieved proximate the junctions of the holder halves. A kit is provided for a rotary seal component with a rigidly mounted seal face. Another seal component includes a seal face comprising two seal face segments resiliently mounted in two holder halves.

Abstract: A seal assembly for installation between rotating and stationary components of a machine includes a first plurality of leaf spring segments secured to the stationary component in a circumferential array surrounding the rotating component, the leaf spring segments each having a radial mounting portion and a substantially axial sealing portion, the plurality of leaf spring segments shingled in a circumferential direction.

Abstract: Rotating machine seal device is improved so that seal plate is fitted to rotating portion firmly, thereby self-induced vibration of the seal plate is reduced and occurrence of abrasion or thinning of the seal plate due to the self-induced vibration and sealing deterioration accompanying therewith are prevented. In rotating machine seal device having seal plate (2) inserted into groove (1a) provided in disc portion (1) driven rotationally, said seal device being for sealing fluid between fluid passage (12) on outer circumferential side of said groove (1a) and fluid passage (14) on inner circumferential side of said groove (1a), said seal plate (2) is divided into plural pieces along circumferential direction thereof to be inserted into said groove (1a) of the disc portion (1) and spring plate (3) is disposed on inner circumferential side of said seal plate (2) so that said seal plate (2) is pressed against seal surface (1b) of said groove (1a) by spring force of said spring plate (3).

Abstract: An expansion joint seal between a gas turbine exhaust duct and an axially adjacent exhaust ductwork comprising plural layers of axially adjacent layers of flexible seal plates, each layer comprising a plurality of arcuate segments which together form a 360.degree. annulus; and further wherein the plural layers of flexible seal plates are secured at one end to the gas turbine exhaust duct, with opposite ends of the seal plates slidably engaged with at least one surface of the exhaust ductwork.

Abstract: A rotating seal ring component kit is provided which comprises a seal ring having a split dividing the seal ring into at least two sections configured to fit around a shaft, a clamp ring having a split dividing the clamp ring into at least two sections configured to circumferentially surround the seal ring, each clamp ring section having tabs which cooperate with corresponding tabs on another clamp ring section to permit assembly of the clamp ring sections around the seal ring; and a housing having a split dividing the housing into at least two sections configured to fit around the shaft, the housing including first and second notches configured to receive the tabs so as to prevent rotation of the clamp ring relative to the housing. A snap ring may be utilized to provide preliminary assembly of the clamp ring sections.

Abstract: A seal assembly adapted for use in sealing two mating surfaces spaced apart by a gap is provided. The seal assembly includes a sealing element adapted to be located in a groove in one of the mating surfaces. A back-up ring assembly is provided which includes a first back-up ring made from a relatively soft material and a second back-up ring made from a relatively hard material. The first back-up ring includes a body with first and second sides, with one of a groove and an interlocking projection being located on the body along the second side. The second back-up ring includes a body with first and second sides, with the other of the groove and the interlocking projection being located along the first side.