Abstract: A hydrostatic seal assembly includes a primary seal assembly configured to maintain a selected gap between the primary seal and a rotating component, and a seal carrier. The seal carrier includes a radial outer wall, an axial wall extending from the radial outer wall at a first axial end of the radial outer wall, and a carrier arm extending from the radial outer wall at a second axial end of the radial outer wall opposite the first axial end. The carrier arm is secured to a static structure for sealing between the rotating component and the static structure.

Abstract: A hydrostatic advanced low leakage seal configured to be disposed between relatively rotatable components. The seal includes a base. The seal also includes a shoe extending circumferentially. The seal further includes a first beam operatively coupling the shoe to the base, the first beam having a first thickness. The seal yet further includes a second beam operatively coupling the shoe to the base, the second beam having at least a portion thereof with a second thickness that is less than the first thickness.

Abstract: A generator seal assembly for preventing leakage of coolant in a generator is presented. The seal assembly includes a coolant side seal ring having a plurality of coolant side seal ring segments. The coolant side seal ring segment includes a seal fluid channel and radial holes circumferentially distributed along the seal fluid channel from leading edge to trailing edge through which seal fluid enters the seal fluid channel. Additional radial holes are circumferentially distributed along the seal fluid channel in a region near leading edge. Additional seal fluid enters the seal fluid channel in the region near leading edge through the additional radial holes such that pressure of seal fluid in the region is increased higher than pressure of the coolant to prevent leakage of the coolant in the region near leading edge due to ration of generator shaft.

Abstract: A seal assembly having: a carbon ring annularly extending about a central axis and having an outer face, and a shrink band annularly extending about the central axis, the shrink band having an inner face, the inner face in contact with the outer face of the carbon ring at a contact interface defined therebetween, the inner face of the shrink band protruding axially beyond the contact interface.

Abstract: A single-shaft turbo compressor having a rotor extending along an axis, an outer housing, static flow fittings, bearings for supporting the rotor, and at least one first shaft seal, wherein the rotor has a shaft and an impeller arranged on the shaft, wherein the static flow fittings have supply elements, intermediate elements and discharge elements, and wherein the outer housing has a casing part that is open at the end on both sides. A first cover of the outer housing is connected to a first shaft seal, wherein supply lines and discharge lines of the first shaft seal are provided extending through the first cover into a wall thickness of the casing part adjacent to the first cover.

Abstract: Aspects of the disclosure are directed to a system comprising: a rotatable seal runner, a stationary sealing member that includes a base and a nose that extends from the base in an axial direction and interfaces with the seal runner, a carrier that supports the sealing member, and a tab coupled to the carrier, where the tab extends from the carrier in the axial direction towards the seal runner.

Abstract: Systems and methods are presented for sealing a higher pressure fluid cavity from a lower pressure fluid cavity in a rotating machine. The cavities are at least partially disposed between a rotatable shaft and a housing. The seal assembly comprises a runner mounting assembly, a circumferential ceramic runner, a carbon seal ring, and an annular seal member. The carbon seal ring is sealing engaged with the housing and at least a portion of the runner to thereby form a boundary between the higher pressure fluid cavity and the lower pressure fluid cavity. The annular seal member is coupled to the housing axially displaced from the seal ring in the lower pressure fluid cavity. The seal member has a curvilinear face surface that engages the runner.

Abstract: An assembly is provided for rotational equipment. The assembly includes a circumferentially segmented stator and a rotor radially within the stator. The assembly also includes a seal assembly configured for substantially sealing a gap radially between the stator and the rotor. The seal assembly includes a carrier and a non-contact seal seated with the carrier. The carrier includes a plurality of discrete carrier segments circumferentially arranged around the non-contact seal.

Abstract: A seal ring assembly for a rotor shaft includes a seal casing defining a radially inwardly directed channel. The seal ring is disposed in the radially inwardly directed channel of the seal casing. The seal ring is resiliently joined about the shaft to form a seal, and the seal ring comprises an electrically insulating or dissipative material or a non-metallic material.

Abstract: A sealing device includes a floating ring in a space between the outer circumference of a rotating shaft and the inner circumference of a housing, and a multi-layered cylindrical body including a plurality of elastically deformable cylindrical thin plates layered on top of each other provided between an outer peripheral surface of the floating ring and an inner peripheral surface of the housing, so as to impart a radial restoring force against the eccentricity of the rotating shaft to restore it to its center position, and a tangential damping force to reduce the whirling of the rotating shaft.

Abstract: An inlet guide vane includes: a movable vane that has a vane main body and a shaft portion disposed in an end portion of the vane main body; a frame that has an insertion hole into which the shaft portion is to be inserted; a plurality of bearing portions that are arranged inside the insertion hole at an interval in a direction of a central axis of the shaft portion and that support the shaft portion to be rotatable around the central axis with respect to the frame; and a seal portion that is located inside the insertion hole between the plurality of bearing portions in the direction of the central axis and that seals an area between the insertion hole and the shaft portion.

Abstract: A leaf seal assembly 10? is disclosed for use in a gap between a rotating component 1 and a stationary component 2, for example of a turbo-machine. The leaf seal assembly 10 comprises at least one leaf seal 20? having a generally planar surface. A runner 50? is coupled to a distal end of the least one leaf seal 20?. The at least one leaf seal 20? maintains the runner 50? in a first position away from the rotating component 1 in an unpressurised inoperative state. The runner 50? moves to a second position, close to, but not contacting, the rotating component 1 in a pressurised operative state. In some embodiments the at least one leaf seal is angled in the direction of the flow. In some embodiments a first leaf seal is vented. In some embodiments the leaf seal assembly is segmented. In some embodiments the runner comprises segments having a radial thickness which varies circumferentially.

Abstract: This rotating electric machine includes: a rotor having a shaft; a stator formed around the rotor; a seal ring formed around the shaft and having a plurality of through holes; a gland seal formed so as to surround the seal ring and having an oil feed port; and a partition plate formed between the seal ring and the gland seal, wherein the partition plate is formed at a position opposed to the oil feed port and is fixed to an upper wall and a lower wall in an axial direction of the gland seal, and the partition plate has a reinforcing plate at such a position as not to obstruct the oil feed port, the reinforcing plate being fixed to a side wall of the partition plate on a gland seal side and being in close contact with a circumferential wall of the gland seal.

Abstract: A method for assembling a seal arrangement may comprise applying an adhesive to a seal, applying a force to a shoe of the seal, and removing the force from the shoe, wherein the adhesive secures the shoe with respect to a static structure in response to the force being removed.

Abstract: A seal assembly is disclosed for sealing a higher pressure fluid cavity from a lower pressure fluid cavity. The seal assembly comprises a mounting assembly, a circumferential ceramic runner carried by the mount assembly, and a carbon seal ring sealingly engaged to the runner. The runner comprises an axially-extending sealing portion and a radially-inward-extending step portion. The mounting assembly comprises a retaining member, a forward member, and a middle member. The step portion of the runner is axially retained between the retaining member and the middle member.

Abstract: This plunger pump includes a pressurization chamber that has a tubular inner circumferential wall and a plunger that has a substantially cylindrical outer circumferential surface. The inner circumferential wall has, in a part thereof in a circumferential direction about an axis of the plunger, a suction opening, which communicates with the pressurization chamber and is for introducing a fuel into the pressurization chamber. The inner circumferential wall is formed with an enlarged gap portion having a larger dimension than a dimension, at a position of the suction opening, from the outer circumferential surface of the plunger to an inner circumferential surface of the inner circumferential wall along a radial direction of the plunger, in at least a part of the inner circumferential wall at a position away from the position of the suction opening in the circumferential direction.

Abstract: A sealing unit for a turbocharger for sealing a transition from a bearing housing into a compressor housing, and a method for producing a sealing unit of this type. The sealing unit includes a sealing bush which is designed for common rotation with a shaft of a turbocharger, a slide ring, and first and second groove rings. The first and second groove rings are designed for common rotation with the sealing bush and are arranged on the sealing bush. The slide ring is arranged between the first and second groove rings in the axial direction so that radially extending sealing gaps are formed on both sides of the slide ring between the slide ring and the respective groove ring.

Abstract: The fluid-cushion sealing device (100) for a piston (101) moving in a cylinder (102) and defining with the latter a chamber to be sealed (104) includes: a continuous perforated ring (105) through the radial thickness of which passes a calibrated opening (111) and which is sealingly accommodated in a ring groove (109) provided in the piston (101) so as to define, with said groove (109), a pressure distribution chamber (119) connected to a pressurized fluid source (112), while an axially blind counter-pressure recess (115) is provided recessed on an external cylindrical ring surface (107) which faces the cylinder (102) and which the continuous perforated ring (105) comprises, the calibrated opening (111) leading into said recess (115).

Abstract: A gas turbine, including: a combustion chamber; a high-pressure turbine with a first turbine guide vane ring that is arranged downstream of the combustion chamber, wherein the first turbine guide vane ring has a plurality of turbine nozzle guide vane segments that respectively include at least one guide vane, an outer platform, and an inner platform; and an outer housing. Provision is made that the turbine nozzle guide vane segments are fixed in the radial direction at the outer housing, wherein occurring radial loads are transferred into the outer housing. The invention further relates to a method for attaching a turbine nozzle guide vane segment of a gas turbine.

Abstract: A non-contact seal assembly includes a plurality of seal shoes arranged about a centerline in an annular array, the seal shoes including a first seal shoe extending axially along the centerline between a first shoe end and a second shoe end. The non-contact seal assembly may comprise a seal base circumscribing axially offset from the annular array of the seal shoes. The non-contact seal assembly may further comprise a plurality of spring elements, each of the spring elements radially distal from and connecting to a respective one of the seal shoes, and each of the plurality of spring elements is axially adjacent to the seal base.

Abstract: A filter with an integrated heater takes in a portion of a fluid of a rotary machine or an external fluid and generates a seal gas that seals the fluid in the rotary machine. The filter with an integrated heater includes: a casing that includes suction port and an ejection port; a filter main body disposed in the casing; and a heater disposed between the filter main body and the ejection port in the casing. The suction port takes in the portion of the fluid or the external fluid from the rotary machine, the ejection port ejects the fluid or the external fluid, and fluid or the external fluid from the suction port passes through the filter main body.

Abstract: Assemblies are provided for rotational equipment. One of these assemblies includes a bladed rotor assembly, a stator vane assembly, a fixed stator structure and a seal assembly. The bladed rotor assembly includes a rotor disk structure. The stator vane assembly is disposed adjacent the bladed rotor assembly. The fixed stator structure is connected to and radially within the stator vane assembly. The seal assembly is configured for sealing a gap between the stator structure and the rotor disk structure, wherein the seal assembly includes a non-contact seal.

Abstract: A shaft seal device is fixed to a container that separates a high-pressure fluid and a low-pressure fluid from each other, and seals a shaft-penetrated portion of the container through which a rotational shaft extends. This shaft seal device includes: a seal casing having a through-hole through which the rotational shaft extends, the seal casing having a seal chamber which communicates with the through-hole and into which the high-pressure fluid flows; and a disk-shaped seal body which is housed in the seal chamber, the seal body being rotatable together with the rotational shaft and having an annular surface perpendicular to an axis of the rotational shaft. An inner surface of the seal casing, which faces the annular surface of the seal body and defines the seal chamber, is a flat surface perpendicular to the axis of the rotational shaft.

Abstract: A circumferential seal for a rotating machine having a ceramic runner and support system is provided. The circumferential seal may comprise a sealing runner having a radially inward facing surface and a mounting element. The mounting element may comprise a radial pilot, an axial flange, an isolating element, a spring element to provide an axially clamping force to the runner, and a support ring extending axially along a shaft a distance greater than the radially inward facing surface of the runner.

Abstract: A seal assembly for a gas turbine engine includes a primary seal that includes an inner face that has a protrusion configured to seal relative to a seal land. The protrusion provided on segmented shoes is circumferentially spaced from one another by gaps. The shoes are positioned in a relaxed state. A removable material encases the protrusion with the shoes in the relaxed state.

Abstract: An assembly is provided for rotational equipment. The assembly includes a circumferentially segmented stator and a rotor radially within the stator. The assembly also includes a seal assembly configured for substantially sealing a gap radially between the stator and the rotor. The seal assembly includes a carrier and a non-contact seal seated with the carrier. The carrier includes a plurality of discrete carrier segments circumferentially arranged around the non-contact seal.

Abstract: A multi-piece seal assembly for use in a torque converter of a motor vehicle includes an inner ring, an outer ring, and an elastomer compensation layer disposed between the inner ring and the outer ring. The inner and outer rings are made from a composite wear material. Tabs on the inner and outer ring interlock with matching slots on the elastomer compensation layer.

Abstract: An assembly is provided for rotational equipment with an axial centerline. This assembly includes a primary seal device, a ring structure and a secondary seal device. The primary seal device is configured as a hydrostatic non-contact seal device. The primary seal device includes a plurality of seal shoes and a seal base. The seal shoes are arranged circumferentially about the axial centerline in an annular array. The seal base circumscribes the annular array of the seal shoes. The ring structure is axially engaged with the seal base. The secondary seal device is mounted with the ring structure. The secondary seal device includes a seal ring body and an alignment tab. The seal ring body is configured to substantially seal an annular gap between the ring structure and the seal base. The alignment tab projects out from the seal ring body and into an aperture in the ring structure. The alignment tab is adapted to substantially rotationally locate and/or fix the secondary seal device to the ring structure.

Abstract: A compliant seal assembly that may be for an MTF of a gas turbine engine includes a housing orientated about an axis with a circumferentially extending groove in the housing opened radially outward. An annular carrier of the assembly is constructed and arranged to move radially within the groove, and includes a circumferentially extending channel that is opened radially outward for receipt of a piston ring that may seal to a surrounding cylindrical wall. In operation, the carrier moves radially with respect to the housing to compensate for radial displacement between the housing and the wall, and the piston ring moves axially along the wall to compensate for axial displacement between the housing and the wall.

Abstract: The disclosure relates to an aircraft propulsion assembly comprising a bypass turbojet engine equipped with a nacelle, the bypass turbojet engine including a structure defining a first part of a secondary flow path for channeling secondary flow, and the nacelle having a structure defining a second part of the secondary flow path. The structure of the nacelle defining the second part of the secondary flow path is arranged such that the first part and the second part of the secondary flow path are angularly offset around a longitudinal axis of the engine when the engine is shut down/stopped.

Abstract: A sealing device between two axisymmetric coaxial parts, includes an elastic segment, two holding elements located on each side of the annular segment, an annular spacer arranged between the two holding elements, wherein the annular spacer has a notch around its peripheral rim; the annular elastic segment has a hooking element at each of its free ends, adapted to cooperate with the notch of the annular spacer, and to hold the elastic segment in a pre-holding position by elastic return force.

Abstract: Provided is a sealing device including: an impeller configured to rotate; a casing including a groove portion in a surface facing the impeller; a floating ring configured to float between the casing and the impeller and configured to be inserted into the groove portion; and a centering ring provided inside the groove portion and provided between the casing and the floating ring.

Abstract: A ring seal for a shaft includes a plurality of arc-shaped ring segments, each of the plurality of ring segments having a radially outer face, a radially inner face, a first axial side face, a second axial side face, a first end and a second end, a spring holding the plurality of arc-shaped segments in an arch-bound configuration, and at least one circumferential ramp in the radially inner face of each of the plurality of ring segments configured to generate an air cushion when a shaft rotates inside the ring seal. Also a ring sealing system including the ring seal and a shaft.

Abstract: Improved bearing systems and methods for adjusting pivot offsets of bearing systems. The improved bearing systems and methods provide offset pivot adjustability. When an adjustable offset pad insert is installed one way, one pivot offset is set. The pivot offset may be adjusted and set another way by removing the adjustable offset pad insert, rotating it 180 degrees and installing the adjustable offset pad insert back in the journal pad.

Abstract: An assembly is disclosed for sealing the sliding interface between two objects capable of sliding or moving with respect to one another, but where the sliding interface must provide a substantial seal against pressure loss therethrough, such as where an assembly seals the sliding interface between a piston and a cylinder or between a rod and a bushing. The sliding interface includes a seal located in a seal groove, wherein the seal ring height is less than the height of the seal groove and the inner diameter of the seal is greater than the base of the groove. In one aspect, the difference in height is set by a shim and a piece of material of the same height as that of the seal ring.

Abstract: A seal assembly for use in a turbomachine is provided. The seal assembly has an annular division wall with outside and inside surfaces, a carrier ring disposed adjacent the inside surface of the annular division wall, and a sealing substrate metallurgically-bonded to an inner-most surface of the carrier ring. The sealing substrate is machined to form a seal surface that can be disposed proximate a rotor and maintained substantially parallel thereto during operation of the turbomachine.

Abstract: A gas turbine engine has a turbine section and an air moving section upstream of the turbine section. A seal is between a static surface and a rotating surface in at least one of the turbine section and air moving section. The seal includes a seal shoe which is biased at least in part by a spring force, with the spring force created by cuts formed to provide a gap to allow arms associated with the seal to provide the spring force. The movement of the shoe is along a direction having at least a component parallel to an axis of rotation of the gas turbine engine. In addition, an axially moving non-contact seal is claimed.

Abstract: A pressure balanced shaft seal assembly that allows a seal to dynamically respond to angular or radial misalignment of a shaft includes a fixed stator, a floating stator, and a labyrinth seal. In one embodiment, the floating stator and labyrinth seal are mounted within an annular groove formed in the fixed stator such that the floating stator and labyrinth seal may move a predetermined amount in the radial direction with respect to the fixed stator. A spherical interface between the labyrinth seal and floating stator may allow the labyrinth seal to pivot with respect to the floating stator during angular misalignment of a shaft around which the pressure balanced shaft seal assembly is mounted. A pressure balancing annular channel formed in the floating stator allows pressurized seal fluid to balance the axial pressure exerted on the floating stator by the process fluid.

Abstract: A system and method for sealing a shaft disposed for rotation within a casing, where two axially-spaced seal rings of an oil film seal extend around the shaft and define a clearance therebetween. Oil is pumped into the clearance from an oil reservoir and a portion of the oil is received in an annular port defined in the casing between an outer labyrinth seal and one of the axially-spaced seal rings. The oil mixes with a process gas to for an oil and gas mixture. A blower is in fluid communication with the annular port and circulates the oil and gas mixture to a trap where the oil is separated from the process gas and a separated process gas is returned back to the annular port.

Abstract: A segment of a seal assembly for sealing against a rotating member is disclosed. The segment includes a radial external surface, a radial internal surface for sealing against said rotating member, a face groove, and a secondary sealing surface. In embodiments, the segment may include a radial feed groove, and the face groove has an axial depth from the surface of the secondary sealing surface that is greater than the axial depth of the radial feed groove. Additionally, in embodiments, the face groove may include a relief groove, the face groove has a radial length at the axial position of the secondary sealing surface, the relief groove is axially offset from the secondary sealing surface, and the relief groove includes a portion with a radial length greater than the radial length of the face groove at the axial position of the secondary sealing surface.

Abstract: An apparatus that uses a combination of mechanical contact bearings and air bearings is disclosed. The apparatus includes a fixed seal housing, attached to a process chamber and a floating seal cartridge, which is disposed in proximity to the fixed seal housing. A shaft is disposed with an aperture in the process chamber, the central opening in the fixed seal housing and the second central opening in the floating seal cartridge. A first air bearing is created between the shaft and the floating seal cartridge in the second central opening. A second air bearing is created between the floating seal cartridge and the fixed seal housing. In this way, the floating seal cartridge is free to move with the shaft radially, while still maintaining a seal between the process chamber and the external environment.

Abstract: A sealing device is provided with a floating ring between an outer periphery of a rotating shaft and an inner periphery of a casing and is characterized in that a turn-stopping means is provided to a single point in a circumferential direction of the floating ring, and a groove for generating dynamic pressure is provided in unequal distribution in the circumferential direction to an inner peripheral surface of the floating ring, wherein a dynamic pressure is generated by a dynamic pressure groove provided to the inner peripheral surface of the floating ring and is employed to thereby match together the center of the rotating shaft and the floating ring.

Abstract: A sealing device is provided with a floating ring between an outer periphery of a rotating shaft and an inner periphery of a casing and is characterized by including a plurality of inversely directed dynamic pressure generation grooves for creating an action whereby a sealed fluid attempting to leak out is pushed back. The plurality of inversely directed dynamic pressure generation grooves are provided in a circumferential direction to the inner peripheral surface of the floating ring, and thereby the amount of leaking of the sealed fluid is reduced and the center of the floating ring and the center of the rotating shaft are matched together.

Abstract: The present invention relates to circumferential seal ring segments positioned around a rotating shaft so as to prevent fluids from leaking from a lubricant sump during both low and high pressure conditions. The circumferential seal is comprised of a plurality of adjoining annular ring segments facing the rotating shaft. Each sealing ring segment includes a dead end circumferential groove on a shaft-side face of each sealing ring such that, when the segments are joined, the circumferential dead end groove of each segment extends arcuately in the direction of shaft rotation. At least one additional groove is contained on the shaft-side face of each sealing ring segment. The additional groove(s) directs and creates pressurized air within the dead end circumferential groove, either directly or indirectly maintaining a seal between the ring segments and the shaft. A bleed hole may also be provided to create a seal between each sealing segment.

Abstract: A self-centering floating seal comprising a ring having first and second diameters, wherein the ring is arranged to be installed between first and second gland components, a plurality of tabs protruding from the first diameter, wherein the tabs are operatively arranged to exert a force on the first gland component to create a radial gap between the first diameter and the first gland component, while the second diameter is arranged to engage against the second gland component for forming a sealed interface, a plurality of seats corresponding to the plurality of tabs, wherein each seat forms a recess in the first diameter of the ring for receiving one of the tabs when each tab is flexed toward the ring, and wherein the tabs are substantially equally spaced about the first diameter of the ring, and each of the tabs spans an axial thickness of the ring.

Abstract: The present application thus provides a retractable seal system for use between a high pressure side and a low pressure side of a turbine engine. The retractable seal system may include a seal positioned in a slot of a stationary component, a pressure balance pocket positioned about the seal, and a conduit in communication with the pressure balance pocket and the high pressure side.

Abstract: A pressure balanced shaft seal assembly that allows a seal to dynamically respond to angular or radial misalignment of a shaft includes a fixed stator, a floating stator, and a labyrinth seal. In one embodiment, the floating stator and labyrinth seal are mounted within an annular groove formed in the fixed stator such that the floating stator and labyrinth seal may move a predetermined amount in the radial direction with respect to the fixed stator. A spherical interface between the labyrinth seal and floating stator may allow the labyrinth seal to pivot with respect to the floating stator during angular misalignment of a shaft around which the pressure balanced shaft seal assembly is mounted. A pressure balancing annular channel formed in the floating stator allows pressurized seal fluid to balance the axial pressure exerted on the floating stator by the process fluid.

Abstract: A self-adjusting seal has a movable seal member fitted in a groove of a dummy ring along a rotor. The movable seal member is biased outwardly in a radial direction by a disc spring, and a gap between the movable seal member and the rotor is large during the start-up or shutdown of rotating turbomachinery. On the other hand, during a rated operation of the rotating turbomachinery, by a fluid having flown into the internal portion of the groove via a gap between a high pressure side end surface of the movable seal member and the groove, the movable seal member is pressed toward the rotor against a biasing force of the disc spring.

Abstract: A flow machine 10 for a fluid shown contains a radial sealing gap (9) which is formed between stator parts (4, 4a, 4b) and a closed impeller (3) of the flow machine, with at least one wear ring (5) arranged in a stationary manner being provided at the sealing gap and having an inner side facing the impeller, an outer side and two axially spaced apart side surfaces. A concentrically extending recess (6) in the form of a radial gap or of a radial incision is formed in the wear ring (5), with the recess 6, starting from one of the side surfaces, extending in the axial direction over more than a fifth of the axial length of the wear ring and with the wear ring (5) being produced from metal, hard metal or a ceramic material.

Abstract: A slider seal assembly for a gas turbine engine includes a housing, a seal plate moveable relative to the housing and a retaining ring. The housing includes an outer surface, an inner surface, and a recessed opening between the outer surface and the inner surface. The seal plate is received within the recessed opening. The inner surface of the housing includes a curved portion which is curved in an outward direction toward the outer surface.