Entries |
Document | Title | Date |
20080246224 | Combined Labyrinth Seal and Screw-Type Gasket Bearing Sealing Arrangement - A bearing sealing arrangement for rotating machines uses a radially-acting labyrinth seal ( | 10-09-2008 |
20080284109 | Seal assembly - This invention provides a seal assembly for sealing a gap between first and second relatively movable members. The first member is provided with a sealing surface, and the second member is provided with a sacrificial abradable layer that is positioned opposite the sealing surface of the first member. When the seal assembly is in operation the sealing surface of the first member moves relative to, and abrades, the abradable layer of the second member thereby maintaining a seal between the members. The present invention is characterised in that, the second member and the abradable layer comprise the same composite material. The second member and the abradable layer may be co-cured together during manufacture. | 11-20-2008 |
20090008881 | Labyrinth Seal For Adjusting Gap - The present invention relates to a labyrinth seal used for controlling the axial leakage rate of a working fluid by using the rotating shaft of a turbo-machine such as a compressor or turbine The labyrinth seal includes: a seal disk radially extending from a rotating shaft and being formed on the rotating shaft; a seal ring spaced apart from the seal disk and being opposed to the seal disk; an actuator for moving the seal ring to adjust a gap between the seal disk and the seal ring; and a controller for controlling an operation of the actuator. By actively adjusting the gap between the seal disk and the seal ring, it is possible to effectively prevent the working fluid from leaking. | 01-08-2009 |
20090072487 | NOTCHED TOOTH LABYRINTH SEALS AND METHODS OF MANUFACTURE - Labyrinth seals and methods of manufacturing the seals are provided. In an embodiment, the seal includes a seal base and a first annular tooth. The seal base has an outer peripheral surface. The first annular tooth extends radially from the seal base outer peripheral surface. The first annular tooth includes a forward wall, an aft wall, and a tip wall, and the forward wall and the aft wall each include bottom sections that contact the seal base and angle upwardly toward or substantially parallel to each other. The forward wall has a notch formed therein defined by a shelf wall and a side wall, the shelf wall and side wall join the forward wall to the tip wall, and the aft wall is formed without a notch. The side wall and the aft wall extend substantially parallel to each other. | 03-19-2009 |
20090072488 | LABYRINTH SEALS AND METHODS OF MANUFACTURE - Labyrinth seals and methods of manufacturing the seals are provided. In one embodiment, and by way of example only, the labyrinth seal includes a land including a plurality of cells, each cell including a first half of a geometric shape and a second half the geometric shape, the first half laterally offset relative to the second half. | 03-19-2009 |
20090127795 | NON-CONTACT LABYRINTH SEAL ASSEMBLY AND METHOD OF CONSTRUCTION THEREOF - A non-contact labyrinth seal assembly, bearing assembly therewith, and method of construction thereof, has an outer rigid carrier and an inner sleeve. The carrier has an outer cylindrical flange and a radially inwardly extending leg and the sleeve has a cylindrical wall and a radially outwardly extending flange. A body is attached to at least one of the leg and the flange, wherein the body provides, at least in part, a purely non-contact labyrinth passage extending between the carrier and the sleeve. | 05-21-2009 |
20100102514 | SHAFT SEALING DEVICE - The invention relates to a shaft sealing device ( | 04-29-2010 |
20100109251 | Shaft Seal Assembly - A shaft seal assembly for maintaining a seal during shaft misalignment comprising a first sealing means adjacent said shaft with a defined clearance between said shaft and said sealing means, said shaft moveable axially in relation to said first sealing means; a second sealing means, said first sealing means partially encompassed within second sealing means and in cooperative communication with said second sealing means; a third sealing means, said second sealing means partially encompassed within third sealing means and in cooperative communication with said third sealing means, said third sealing means attached to said housing or vessel and allowing said first sealing means and second sealing means to cooperatively respond to said forces produced by angular misalignment of said shaft during rotation of said shaft while maintaining defined clearance between said shaft and said sealing means. | 05-06-2010 |
20100148449 | SEGMENTED SEALING LIPS FOR LABYRINTH SEALING RINGS - A labyrinth sealing ring for a labyrinth seal of a turbine disk | 06-17-2010 |
20100181730 | BEARING SEAL - A non-contacting sealing device for a bearing includes a labyrinth seal with a static shut-off device. The non-contacting sealing, or isolator, device includes stator, a rotor and the static shut-office device, which includes at least one deformable toroidal member adjacent to the stator surface and adjacent to the rotor surface. The deformable toroidal member engages both the stator surface and the rotor surface when the rotor is static and disengages at least one of the stator surface and the rotor surface when the rotor is operational. The seal may be an integral part of the bearing, or a substantially attachable member to a bearing. | 07-22-2010 |
20100270750 | SEAL FOR A GRATE COOLER - A seal for a grate cooler, in particular for a grate cooler that operates according to the Walking-Floor principle, the seal sealing two individual grate elements that move relative to one another against the penetration of cooled material between the individual grate elements, the seal having at least one individual sealing element. | 10-28-2010 |
20110101618 | Motor Grounding Seal - A shaft seal assembly is disclosed having a stator including a main body and axial and radial projections therefrom. The rotor is radially extended and encompasses the axial and radial projections from said stator. A passageway formed between the radial projection of stator and rotor results in an axial passageway having its opening facing rearwardly from the rotor and away from the source of impinging coolant and/or contaminant. A concentric circumferential receptor groove in the stator facing the housing allows insertion of conductive means for transmission of electrostatic charge away from the shaft through the shaft seal assembly to the housing and ground. The receptor groove is opposite the axial passageway and provides for both a substantially lower contaminant environment and improved engagement with conductive means. | 05-05-2011 |
20110109047 | FLOODED BEARING ISOLATOR - A labyrinth sealing device is disclosed for use between a rotating shaft and a bearing housing. In some embodiments, an internal stator engages the housing and a rotor engages the shaft. A labyrinth pathway is defined between the rotor and stator to prevent the migration of lubricants and/or contaminants in either direction. The rotor acts as a running surface for the sealing element, but may also with a ground surface of the rotor to provide a pump that continuously draws lubricant away from the sealing lip toward a sump. In another embodiment, the stator and sealing element are combined as a single element formed from a sealing material. A recess in the sealing lip creates a pressure differential at the sealing surface and minimizes wear. | 05-12-2011 |
20110121519 | SEAL WITH STACKED SEALING ELEMENTS - A hybrid seal for sealing the circumferential gap between a first machine component and a second machine component comprises at least one shoe extending along one of the machine components in a position to create a non-contact seal, at least one spring element connected between one of the machine components and the shoe(s) and a stack of sealing elements located within a slot formed in the shoe(s), wherein a primary seal and secondary seal of the circumferential gap is created by the shoe(s) in cooperation with the spring element(s) and sealing elements, respectively. | 05-26-2011 |
20110148046 | LEAF SEAL ASSEMBLY - A leaf seal assembly ( | 06-23-2011 |
20110193293 | SEAL ARRANGEMENT - A seal arrangement provided between a static component and a rotating component arranged for rotation about a rotational axis. The arrangement preferably takes the form of an interstage seal for a gas turbine engine, including: first and second seal members carried by respective said components and arranged concentrically about said rotational axis. The first seal member has a plurality of radially directed seal fins extending towards the second member and a substantially radially directed flow outlet configured to direct a flow of cooling air through the first member. In one aspect of the invention, the second member has a radial projection at one end of its axial length, the projection extending towards the first member at a position spaced axially between the flow outlet and said seal fins. In another aspect of the invention, the flow outlet is axially adjacent a seal fin which is configured so as to be generally concave towards the flow outlet. | 08-11-2011 |
20110221140 | SEALING DEVICE - To improve sealing performance, a sealing device comprises an oil seal ( | 09-15-2011 |
20110291363 | PILLOW BLOCK SEAL - A seal for a pillow block that supports a rotating shaft includes an annular body having an inner surface opposite an outer surface. Disposed in the inner surface is a retaining channel that retains two double-wound laminar gripping rings that are separated by a double-wound laminar engagement ring. The gripping rings are dimensioned to frictionally engage and are carried by the shaft as it rotates. The engagement ring remains fixed within the retaining channel relative to the rotating gripping rings, resultantly forming a labyrinth seal to prevent the intrusion of particles and debris from entering the pillow block to prevent the contamination of lubricants contained therein. | 12-01-2011 |
20120001395 | SEAL ASSEMBLY - A seal assembly seals a first portion of a machine part relative to a second portion of the machine part. The seal assembly includes at least one seal element that contacts the machine part or contacts a component connected with the machine part or that extends with a gap relative to the machine part or to the component connected with the machine part. At least one of the seal element, the machine part and the component connected with the machine part is provided or coated with a material, which has super hydrophobic properties, in the area of the seal element. | 01-05-2012 |
20120032403 | SEAL ASSEMBLY - A seal assembly including first and second components; a seal arranged between the first and second components to seal a secondary flow region from a primary flow region; and a second recess portion provided on a surface of the second component between the seal and the primary flow region, the second recess portion further being arranged to receive a first portion of a flow from the secondary flow region and being configured to promote a second flow feature within the second recess portion, wherein the second recess portion is set back from the surface of the second component such that a second portion of the flow from the secondary flow region bypasses the second recess portion. | 02-09-2012 |
20120043728 | TURBINE ENGINE SEALS - A seal is provided for preventing axial leakage through a radial gap between a stationary structure and a rotating structure. The radial gap is defined by an inner radial surface opposing an outer radial surface across the radial gap. The seal includes at least one land disposed on one of the inner radial surface and outer radial surface. At least one first tooth and at least one second tooth project from the other of the radial surfaces. The second tooth is shorter than the first tooth. At least one of the first tooth and second tooth, is configured to extend at an angle upstream. This angle is defined between a radial surface from which the first or second tooth projects and an upstream surface of the same tooth. The angle is less than or equal to about 80 degrees. | 02-23-2012 |
20120080853 | ANNULAR SEALS FOR NON-CONTACT SEALING OF FLUIDS IN TURBOMACHINERY - According to one embodiment of the disclosure, an annular seal generally includes a hollow member having two ends and an inner surface. The hollow member has a number of depressions formed in and extending around its inner surface. Each of the depressions having a depth that is a function of its distance from one of the two ends. | 04-05-2012 |
20120193875 | METHOD AND APPARATUS FOR LABYRINTH SEAL PACKING RING - The present disclosure relates to a seal assembly for a turbomachine that includes at least one arcuate plate, a biasing member, and at least one packing ring segment. The packing ring segment includes at least one barrier that restricts circumferential flow of a fluid along the packing ring segment. In addition, the seal assembly includes a plurality of arcuate teeth disposed intermediate to the packing ring segment and the rotor. The clearances of at least two of the arcuate teeth are different from one another. | 08-02-2012 |
20120228830 | LABYRINTH SEAL AND METHOD FOR PRODUCING A LABYRINTH SEAL - A labyrinth seal for sealing a sealing region between a rotor and stator of a rotary machine includes, a base, and a plurality of sealing rings. The sealing rings are formed on the base, project into the sealing region and form, between them labyrinth valleys bounded, laterally, by the sealing rings and, in the floor of the valleys, by the base. The sealing rings, in at least one region, include at least one material which is different from that of the base. | 09-13-2012 |
20120248707 | ASSEMBLY COMPRISING A ROTATABLE COMPONENT - An assembly, for example in a gas turbine engine, includes a rotatable component supported by a bearing in a support structure. A sealing arrangement includes a non-rotating sealing ring which makes sealing contact with sealing features on the rotatable component. The non-rotating sealing ring is radially displaceable with respect to the support structure by means of ribs which engage axially facing support faces of the support structure. The non-rotating sealing ring is radially located by an outer, non-rotating, race of the bearing, by means of a locating surface on a locating body of the non-rotating sealing ring. As a result of this arrangement, the running clearance at the sealing arrangement can be maintained, despite radial displacement of the rotatable component with respect to the support structure, and despite thermal and mechanical deflections of the support structure. | 10-04-2012 |
20120261885 | SEAL ARRANGEMENT - A sealing arrangement for a bearing assembly. The sealing arrangement can include a static seal carrier coupled to a static component of the bearing assembly and including a first plurality of rings, a rotating seal carrier coupled to a rotating component of the bearing assembly and including a second plurality of rings, the first plurality of rings and the second plurality of rings disposed in an interdigitated arrangement so as to define a tortuous passageway therebetween, the tortuous passageway having one end in communication with a high pressure area of the bearing assembly and a second end in communication with a low pressure area of the bearing assembly, and a scraper seal coupled to the rotating seal carrier and disposed over the second end of the tortuous passageway. | 10-18-2012 |
20120319356 | System for Contactlessly Sealing a Rotably Mounted Shaft from a Housing, and Gear Unit - In a system for contactlessly sealing a rotably mounted shaft from a housing, and a gear unit, oil is provided in the interior of the housing, the rotating shaft in particular projecting from the interior to the outer area, wherein a centrifugal disk is provided, which is connected to the shaft in torsionally fixed manner and has at least partially radially extending bores, which connect oil from a centrifugal chamber to a catch basin surrounding the centrifugal disk. | 12-20-2012 |
20130038025 | LEAF SEAL - A process is provided for forming a leaf-spacer pair for use in a leaf seal which effects a seal between two components. The process includes the steps of:
| 02-14-2013 |
20130038026 | LEAF SEAL - A first process is provided for forming a stack of leaves for use in a leaf seal which effects a seal between two components. Corresponding processes are provided for forming a leaf-spacer pair and then for forming a stack of leaves from such pairs. Each leaf of the stack has a leaf section which maintains wiping contact with one of the components and a root section which is fixed relative to the other component and from which the leaf section extends. The stack includes a plurality of spacers which interpose between the root sections. | 02-14-2013 |
20130049303 | Pressure Balanced Shaft Seal Assembly - 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. | 02-28-2013 |
20130082446 | METHOD OF REPAIRING ROTATING MACHINE COMPONENTS - An apparatus and a method for repairing a component of a gas turbine engine is provided. The method includes locating a damaged area of the component, preparing a portion of the component that includes the damaged area leaving a remaining portion of the component, welding at least one layer of material to the remaining portion, using a cold metal transfer (CMT) process, and removing excess material from the component to a predetermined dimension. | 04-04-2013 |
20130200571 | SEAL MECHANISM FOR USE WITH TURBINE ROTOR - A seal mechanism is provided which comprises a structure capable of accommodating radial expansions of turbine rotor without increasing an axial size thereof and providing a reliable sealing property for the turbine rotor for a long time. The seal mechanism comprises a labyrinth seal | 08-08-2013 |
20130328273 | INTERNAL OIL SEAL FOR ELECTRIC MOTORS - An oil seal for an end bearing of an electric motor with one or more internal cooling fans. The oil seal includes: (a) a non-contact floating ring seal, forming a first stage integrated into the bearing housing; (b) an adjacent labyrinth seal with three lands and two grooves, forming a second and third stage; and (c) air conduits that pressurize the groove of the third stage with air discharged from the stator during operation of the motor, forming an air seal room that inhibits the effect of fan suction that could otherwise draw oil from the bearing housing. | 12-12-2013 |
20140001706 | WATERPROOF ROTATION MECHANISM AND RADAR ANTENNA DEVICE | 01-02-2014 |
20140027985 | SHAFT SEAL ARRANGEMENT - A shaft seal arrangement for turbomachine is presented. The arrangement has a high and a low pressure side at each axial end, a rotor and a fixed stator part, and a dry gas seal. An additional shaft seal is provided at end of high-pressure side in a serial to seal intermediate space and has a fixed and a rotating shaft seal part. A central shaft seal surface extends in circumferential and in axial direction and is arranged between fixed and rotating shaft seal part on a fifth diameter coaxially with respect to rotational axis. A fourth stationary seal is arranged between fixed seal element and stator part on a fourth diameter to seal a first differential pressure. Damage due to changes of thrust is prevented if the dry gas seal is defective by difference between the fourth and fifth diameter being less than 10% of the firth diameter. | 01-30-2014 |
20140054863 | SEAL ASSEMBLY FOR A TURBINE SYSTEM - A seal assembly for a turbine system includes a sealing strip having a forward surface and an aft surface, wherein the sealing strip is operably coupled to a first component and extends radially outwardly toward a second component for inhibiting a flow of fluid passing through a fluid path defined by the first component and the second component. Also included is at least one groove disposed within at least one of the forward surface and the aft surface of the sealing strip. | 02-27-2014 |
20140159318 | NON-CONTACT LABYRINTH SEAL ASSEMBLY AND METHOD OF CONSTRUCTION THEREOF - A non-contact labyrinth seal assembly, bearing assembly therewith, and method of construction thereof, has an outer rigid carrier and an inner sleeve. The carrier has an outer cylindrical flange and a radially inwardly extending leg and the sleeve has a cylindrical wall and a radially outwardly extending flange. A body is attached to at least one of the leg and the flange, wherein the body provides, at least in part, a purely non-contact labyrinth passage extending between the carrier and the sleeve. | 06-12-2014 |
20140191476 | LABYRINTH SEAL - A labyrinth seal is provided for sealing the annular interspace between the rotor and the stator of a steam turbine or gas turbine. The labyrinth seal includes a multiplicity of sealing strips which are arranged in series in the axial direction and fastened on the stator and project into the interspace. The sealing strips interact, with sealing effect, with rotor-side sealing elements which are arranged in a staggered manner. An improved sealing effect is achieved by the sealing strips in the cold installed state being offset in relation to a symmetrical position, wherein the offset has the reverse direction and the same amount as the distance by which the sealing strip is displaced relative to adjacent rotor-side sealing elements as a result of thermal expansions of the stationary and rotating components and support structure when being heated from the cold installed state to a hot steady-state operating condition. | 07-10-2014 |
20140265147 | Purgeable Labyrinth Axle/Hub Seal - A purgeable labyrinth axle/hub seal for a motor vehicle with an axle annular member that attaches to an end portion of an axle and a hub annular member that attaches to a wheel hub and matingly connect for defining a cavity that receives grease and a labyrinth gallery for a grease path from the cavity, to seal the connection of the axle and hub from water, dirt and other contaminants. | 09-18-2014 |
20140319777 | ROTATING DEVICE - A rotating device includes a rotator on which a magnetic recording disk is to be mounted, and a stationary body that supports the rotator in a freely rotatable manner through a fluid dynamic bearing. A lubricant is continuously applied to a lubricant applied portion in a gap between the rotator and the stationary body and from a second capillary seal to a first capillary seal through a dynamic pressure generating portion of the fluid dynamic bearing. This rotating device is structured so as to reduce an amount of the lubricant spilled and eventually dissipated when shock of substantially 1200 G is applied to be less than 5% of the total amount of the lubricant. | 10-30-2014 |
20140333031 | FLOODED BEARING ISOLATOR - A labyrinth sealing device is disclosed for use between a rotating shaft and a bearing housing. In some embodiments, an internal stator engages the housing and a rotor engages the shaft. A labyrinth pathway is defined between the rotor and stator to prevent the migration of lubricants and/or contaminants in either direction. The rotor acts as a running surface for the sealing element, but may also with a ground surface of the rotor to provide a pump that continuously draws lubricant away from the sealing lip toward a sump. In another embodiment, the stator and sealing element are combined as a single element formed from a sealing material. A recess in the sealing lip creates a pressure differential at the sealing surface and minimizes wear. | 11-13-2014 |
20140333032 | LABYRINTH SEAL HAVING LABYRINTH RINGS WITH DIFFERENT WEAR RESISTANCES - A labyrinth seal includes a first labyrinth ring and a second labyrinth ring. In an installed state of the labyrinth seal, the first labyrinth ring and the second labyrinth ring engage in each other in an at least partially overlapping manner and are rotatable relative to each other. Furthermore, in the installed state, mutually-opposing surfaces of the first and of the second labyrinth ring have different wear resistances. | 11-13-2014 |
20150014940 | Shaft seal assembly - An illustrative embodiment of a shaft seal assembly generally includes a fixed stator, a floating stator, and a sealing member. In the illustrative embodiment the fixed stator may be formed with one or more fluid conduits that are in fluid communication with one or fluid conduits formed in the floating stator. The fluid conduits in the floating stator may be in fluid communication with one or more fluid conduits formed in a sealing member. A rotational interface may exist between the sealing member and a shaft, and the various fluid conduits may be configured to create a fluid barrier at that interface. Other embodiments of a shaft seal assembly may create a fluid barrier at a rotational interface between a rotor and a floating stator. | 01-15-2015 |
20160130966 | SEALING ARRANGEMENT FOR A GAS TURBINE ENGINE - There is described a seal assembly for a gas turbine engine comprising: a first seal having a sealing passage which defines a flow path trajectory for leakage air, the first seal for partitioning a first pressure area to a lower pressure area; a second seal located along the line of the flow path trajectory of the first seal, the second seal for partitioning a second pressure area and the lower pressure area; a deflection member located between the first seal and second seal, and in the trajectory of the flow path from the first seal. | 05-12-2016 |
20160146032 | Pressure Seal With Non-Metallic Wear Surfaces - A gas turbine engine has a first component and a second component. The first and second components have a high-pressure chamber on one side and a low pressure chamber on an opposed side. A three sided seal has one side facing each of the first and second components, and a third side facing a third component. At least one non-metallic wear surface is between one of the three sides of the seal and the facing component. | 05-26-2016 |
20160169394 | SELF-CENTERING LABYRINTH SEAL | 06-16-2016 |
20170234429 | System for the Contactless Sealing of a Rotatably Mounted Shaft with Respect to a Housing, and Gear Unit | 08-17-2017 |