Abstract: Various embodiments include systems and apparatuses adapted for acoustical insulation. In some embodiments apparatuses include a seal assembly for a conduit, the assembly includes a substantially inflexible collar member sized to form an axial seal around the conduit, the substantially inflexible collar member having a flange extending substantially radially and a substantially flexible axial seal member in sealing contact with the substantially inflexible collar member, the substantially flexible axial seal member including a first portion in sealing contact with a first face of the flange and a second portion in sealing contact with a second face of the flange, wherein the substantially flexible axial seal member and the substantially inflexible collar member maintain the axial seal around the conduit and permit axial movement, translational movement and rotational movement of the conduit relative to a conduit passage panel.

Abstract: A seal backup ring is provided with undulating surfaces which create circumferential convergence with a relatively rotatable surface. The backup ring is configured so that differential pressure acting across a rotary seal forces portions of the backup ring against the relatively rotatable surface, closing, or substantially closing, the extrusion gap that the rotary seal is exposed to. In response to relative rotation between the backup ring and the mating relatively rotatable surface, the circumferential convergence promotes hydrodynamic lubrication within the dynamic interface that exists between the backup ring and the relatively rotatable surface. The modulus of elasticity of the backup ring is greater than the modulus of elasticity of the rotary seal.

Abstract: An improved shaft seal includes a plurality of V-pack rings that each includes a bi-directional cut with cuts of unequal lengths. An upper cut extends from the top of the V-pack ring to the shoulder. A lower cut extends from the bottom of the V-pack to the shoulder and is longer in length than the upper cut.

Abstract: In a seal ring, first and second abutments that are opposed to each other at a cut-apart portion have first and second protrusions 3a and 3b and first and second recesses 4a and 4b that are juxtaposed to each other in the axial direction, and a radial gap 5a is defined between the first protrusion 3a of the first abutment 1a that is pressed against a side wall 13a of an annular groove 13 formed in a shaft member 12 near a non-oil pressure side 14b and the second recess 4b of the second abutment 1b, with the radial gap 5a and a circumferential gap 2 between the first and second abutments 1a and 1b forming a passage through which an oil pressure side 14a of the annular gap 14 communicates with the non-oil pressure side 14b. The abutments 1a and 1b are not complicated in shape, and still, foreign matter contained in oil in the oil pressure side 14a can be smoothly discharged into the non-oil pressure side 14b.

Abstract: Systems and devices for sealing portions of a rotary machine are disclosed. In one embodiment, a seal assembly element includes: a head flange; an axial neck connected to the head flange, wherein the axial neck includes a mating flange extending circumferentially from a distal end of the seal assembly element, the mating flange configured to form a multidirectional seal with a recessed portion of a complementary seal assembly element; and a set of axial seal teeth connected to the axial neck.

Abstract: A gas turbine engine augmentor has a centerbody within a gas flowpath from upstream to downstream. The augmentor has upstream and downstream shell sections, a downstream rim of the upstream shell section meeting an upstream rim of the downstream shell section shell section. A plurality of vanes are positioned in the gas flowpath outboard of the centerbody. An augmentor spray bar fuel conduit extends through the centerbody and a first of the vanes to deliver fuel to the centerbody. A seal is mounted to the spray bar and positioned in a recess extending from at least one of the downstream rim of the upstream shell section and upstream rim of the downstream shell section shell section. The seal has a first portion and a second portion engaging the first portion in a backlocked interfitting.

Abstract: A locking joint seal includes a ring-shaped body made from poly tetra fluoroethylene and having a first end and a second end. The first and second ends each include mutually engageable first and second locking features. The first locking feature including a first axially extending portion overlapping a second axially extending portion of the second locking feature in an assembled condition.

Abstract: A segmented labyrinth seal (10) having a windback configuration formed around a rotatable shaft for preventing leakage of oil from a bearing housing having a first face (22) and a second face (23). An exterior cylindrical surface (19) and an interior cylindrical surface (18) extend between the first face (22) and the second face (23). A thread pattern (40) provided on the interior cylindrical surface (18) providing the windback configuration, and configured in a right-hand direction or a left-hand direction. A plurality of profiled teeth (41) form the thread pattern (40) and have first sides (43), second sides (44), and connecting sides (45) extending between the first sides (43) and the second sides (44). Leading edges (47) are formed where the first sides (43) join the connecting sides (45), and trailing edges (48) are formed where the second sides (44) join the connecting sides (45). The first sides (43) and the second sides (44) are slanted toward the first face (22).

Abstract: It is intended to suppress rattling in the fitted state of segments to improve operating efficiency in bonding the segments together. A cage composed of a plurality of arcuate segments, wherein a joining projection formed in the bonding section of one of adjacent segments is fitted in a joining recess formed in the bonding section of the other to thereby annularly bond the segments. In this cage, said joining projection and joining recess have tapered fitting surfaces as seen in a radial section, and the two fitting surfaces are closely contacted and joined together.

Abstract: One brush seal unit is piled on another one in such a manner that thin beams of the one brush seal unit overlap the slits of the another brush seal unit easily using their positioning sections in order to improve sealing ability. The pitches at the positioning sections of each brush seal unit is determined so that the slits and thin beams of the neighboring and piled brush seal units are overlapped each other by relatively displacing the neighboring brush seal units.

Abstract: The brush section of a brush seal is protected from damages during installing work. It is constituted such that a brush seal unit has, at the free end of the brush section, at least one ablative plate section formed therewith and has a thin groove at the boundary between the brush section and the ablative plate section; and the ablative plate section is broken off before mounting the brush seal between two components.

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: 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 and method according to which a plurality of seal members are provided, each of which is formed by a strip of material having two interlocking portions. One of the interlocking portion of each seal member interlocks with one interlocking portion of another seal member, and the other interlocking portion of the each seal member interlocks with one interlocking portion of another seal member.

Abstract: A split seal (1) having an annular cross-section and a central axis (X) comprises at least two components (2,3) of arcuate form, each component having two end portions (4,4',5,5') and each end portion having a surface (F1,F2) formed and arranged for mating engagement with a respective complementary end portion surface of another of the components. Each end portion surface (F1,F2) extends in an indirect manner over one of the radial width (.delta..sub.r) and the axial length (l) of the seal and each end portion surface (F1,F2) extends substantially continuously in non-reentrant manner over the other one of the radial width (.delta..sub.r) and the axial length (l) of the seal so that the matingly engaged components are substantially smoothly, relatively translatable in one of a generally axial direction and a generally radial direction. In a preferred embodiment each end portion surface (F1,F2) extends in a zigzag manner.