Class / Patent application number | Description | Number of patent applications / Date published |
277306000 | Relatively rotatable radially extending sealing face member (e.g., face, mechanical, etc.) | 50 |
20080284105 | LOW AND REVERSE PRESSURE APPLICATION HYDRODYNAMIC PRESSURIZING SEALS - 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. | 11-20-2008 |
20090206552 | SHAPE MEMORY (ALLOY) HERMETIC SEAL AND THREADED JOINT INCORPORATING SAME - A hermetic seal includes a face seal ring having a first end sealing face and a second end sealing face, a first sealing profile in contact with the first end sealing face, and a second sealing profile in contact with the second end sealing face. The face seal ring comprises a shape memory material. A hermetically-sealed, threaded joint includes a pin sub defining a first sealing profile, a box sub defining a second sealing profile, and a face seal ring comprising a shape memory material. The pin sub is threadedly engaged with the box sub. The face seal ring has a first end sealing face in contact with the first sealing profile and a second end sealing face in contact with the second sealing profile. The face seal ring is disposed about the pin sub. | 08-20-2009 |
20090243219 | HIGH TEMPERATURE DYNAMIC SEAL - A high temperature dynamic seal and methods of assembly and use are presented. In one embodiment, the dynamic seal is provided as a rotating seal, which includes a stationary ring and rotating ring assembly, with a seal ring that is positioned between the stationary ring member and the rotating ring assembly. In some embodiments, one or more high temperature seals create a seal between the stationary ring member and a device in which the dynamic seal is used. Similarly one or more high temperature seals create a seal between the rotating ring assembly and a rotating shaft of the device. In one aspect, one or more of the high temperature seals are formed from a metallic material with various cross-sectional shapes. | 10-01-2009 |
20090309308 | ROTATING SEALS FOR CELL PROCESSING SYSTEMS - The invention provides an improved rotating seal apparatus including a plurality of concentrically spaced annular rotating seals. The invention also provides a rotating seal apparatus including a pressurized annular chamber surrounding an annular rotating seal. | 12-17-2009 |
20100032907 | SEAL ASSEMBLY - A seal assembly ( | 02-11-2010 |
20100052258 | Spindle Seal With Tangential Flow-Inducing Distribution Ring - An improved cartridge-type bearing seal includes removably connected stator and rotor sections. The stator section supports a distribution ring that divides an internal annular volume into radially outside and inside portions. The ring has a sufficient number of tangentially oriented ducts to permit fluid communication between the outside and inside portions. With this structure, when pressurized purge fluid is supplied to the outside portion, the fluid flows through the ducts, to induce a desired tangential fluid flow within the inside portion. This in turn causes circumferentially uniform fluid pressure in the annular volume that resides between the rotating shaft and the bearing housing, and the pressurized fluid traverses a flow path out of the bearing. This circumferentially uniform fluid pressure, by itself or in combination with a flexible lip, prevents contaminant ingress between the rotating shaft and the bearing housing. Because the structure that creates the tangential fluid flow is part of the removable cartridge, this bearing seal eliminates the need to machine or drill a tangentially oriented passage in the bearing housing. One embodiment adds a secondary ring adjacent the distribution ring, to reduce the need to precision machine the inside dimension of the bearing cap. These structural components render the circumferential purge fluid feature even more readily available, for a wider range of spindles. | 03-04-2010 |
20100289223 | REGENERATIVE HEAT EXCHANGER AND METHOD OF REDUCING GAS LEAKAGE THEREIN - A heat exchanger | 11-18-2010 |
20110024987 | MECHANICAL SEAL ASSEMBLY FOR A ROTATABLE SHAFT - A mechanical seal assembly for a rotatable shaft is disclosed. In one embodiment, the mechanical seal assembly comprises a first sealing element configured to surround a rotatable shaft, the first sealing element including an annular plate, and a plurality of annular rings that protrude from the annular plate in a direction substantially parallel to the rotatable shaft. The annular rings are concentric with the rotatable shaft. A second sealing element is configured to surround the rotatable shaft, with the second sealing element including one or more springs that provide a biasing force against the first sealing element such that substantially constant contact is maintained between the annular rings and a sealing surface. One or more lubricant cavities are defined between the annular rings and the sealing surface. | 02-03-2011 |
20110115164 | Low and Reverse Pressure Application Hydrodynamic Pressurizing Seals - 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. | 05-19-2011 |
20110121514 | AXIAL FACE SEAL ASSEMBLY, MOUNTING METHOD AND MOUNTING FIXTURE - An axial face seal assembly including a seal member which is seated in a carrier, the carrier being non-rotatably connected to a base member but movable axially thereto and biased from the base member by means of a compression spring interposed between the base member and the carrier, the base member being axially and non-rotatably securable to a drive shaft by means of an open ring clamp having first end second ends. The ring clamp is supported on the base member, at least one of said first and second ends being movable relative to the other end in a circumferential direction; and wherein tightening means is rotatably journalled on the base member for adjusting the relative distance between the first and second ends of the ring clamp. A mounting fixture is likewise disclosed and cooperating with the seal assembly in a mounting procedure. | 05-26-2011 |
20110210514 | Low and Reverse Pressure Application Hydrodynamic Pressurizing Seals - 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. Each additional groove is an axial bore groove extending perpendicularly to a longitudinal axis of the seal ring segment in fluid communication with the dead end circumferential groove so as to direct fluid flow generated from a rotating shaft into the dead end circumferential groove. 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. | 09-01-2011 |
20110221136 | SPLIT SEAL ASSEMBLY AND METHOD - A split mechanical end face seal assembly has a split gland plate assembly, a split mating seal ring assembly, a split primary seal ring assembly and a split biasing assembly. The segmented mating seal ring is axially and radially supported on the segmented mating ring adapter by resilient connector strips as pre-assembled sub-assemblies and the resilient connector strips axially non-rigidly support the mating seal ring within said mating ring adapter assembly. An axially movable primary sealing ring assembly includes a segmented primary seal ring. The biasing assembly is pre-assembled into the gland plate assembly and urges the primary seal ring into sealing relation with the mating seal ring. A method of installation includes resilient axial and radial support of the mating seal ring segments in mating ring adapter segments by the resilient connector strip for installation as a pre-assembled sub-assembly. It further includes pre-assembly of semi-circular shaped biasing ring segments into segments of the gland plate assembly. | 09-15-2011 |
20110278798 | METHOD AND SYSTEM FOR CONTROLLING CONTACT BETWEEN SEAL COMPONENTS - A temperature responsive control system, the system including a first seal, a second seal abutting the first seal, and a thermally reactive element in contact with the first seal and/or the second seal wherein the thermally reactive element constricts to displace at least one of said first and second seals, for reducing a degree of contact pressure between the first and second seals from a first, higher level of contact pressure to a second, lower level of contact pressure, when a temperature of the first seal and/or the second seal increases to a level to activate the thermally reactive element to constrict. A water pump seal pressure system with abutting seals and a method for managing the contact between abutting seals in a system are also disclosed. | 11-17-2011 |
20110285089 | Fluid Seal Assembly - A fluid seal assembly (the assembly) of the present invention is disposed between an outer surface, i.e. engine block or any other part that requires application of the assembly and a rotatable member, such as, for example a shaft, wherein the assembly circumscribes the shaft and lubricated the shaft and the same rotates around the axis. The assembly includes at least three members: a casing unit, a sealing ring unit, and a collar. The assembly eliminates problems associated with prior art designs such as static leakage of oil, clogging up the spirals with carbonized oil that negatively impact lifecycle of the fluid seals. | 11-24-2011 |
20120043724 | INTER STAGE SEAL HOUSING HAVING A REPLACEABLE WEAR STRIP - An inter stage seal housing for a turbine engine having upper and lower half inter stage seal housings in which a contact sealing surface of the seal housing is restored after an interval of engine operation. The contact sealing surface is restored by fitting a replaceable wear strip on the downstream sealing surface of the seal housing. In order to fit the replaceable wear strip, a circumferential groove is machined along an outer peripheral edge of the seal housing. The groove is machined to include axial location and radial retention such that the wear strips can be slid into the upper half and lower half inter stage seal housing circumferentially from the horizontal joint. The groove includes through holes and the wear strips include corresponding threaded holes such that the wear strips can be fastened in the groove by fasteners and fastener retention hardware. | 02-23-2012 |
20120043725 | INTERSHAFT SEAL - An intershaft seal for inner and outer coaxial shafts which rotate relative to each other. The seal is located in an annular space between the shafts and maintains an axial pressure differential between a fluid pressure on the first side of the seal and a fluid pressure on the other, second side of the seal. The seal comprises a sealing ring which is coaxial with the shafts and which forms a sealing contact with the outer shaft to maintain the pressure differential. | 02-23-2012 |
20120068413 | SEALING PROFILE - A sealing arrangement comprising first and second machine elements which can turn relative to one another and delimit an installation space to be sealed for a sealing ring. The sealing ring has at least one static sealing area, which is connected, in a form-locking manner, by an anchoring bead, with a congruently shaped first indentation in the first machine element. The sealing ring has at least one dynamic sealing area with at least one first sealing lip that touches a first undercut of the second machine element with a sealing effect. The dynamic sealing area has at least one second sealing lip, which is connected with the first sealing lip by a connecting piece. | 03-22-2012 |
20120200043 | SEAL BODY, APPARATUS AND METHOD - A seal body for use with a torque tube includes a first portion having an attachment mechanism to releasably secure a torque tube to the first portion, and a second portion configured adjacent to the first portion. The second portion of the seal body includes a substantially uniplanar sealing surface that is orthogonal to an axis of rotation of the torque tube, and that extends across a substantially uniplanar axial end face of the torque tube. | 08-09-2012 |
20130062832 | FLOW MACHINE, SLIDE RING SEAL THEREOF, BODY PART FOR SAID SLIDE RING SEAL AND METHOD OF FASTENING SAID SLIDE RING SEAL TO SAID FLOW MACHINE - Disclosed is a slide ring seal, which is used, for example, for sealing a shaft space of a centrifugal pump in relation to a pumping space thereof and to centering the mechanical seal and/or fastening the seal to the casing of the centrifugal pump and a body part used for the attachment. A feature of the disclosed seal, including at least one rotary slide ring unit, a body part by means of which the seal is attached to the casing, and at least one either separate counter ring unit or a counter ring unit stationarily attached to the body part, is that the body part is provided with inclined fastening means by means of which the body part ( | 03-14-2013 |
20130075973 | ROLLING STAND ROLL NECK SEAL - A rolling mill roll neck is sealed by interposing a seal between a roll flinger having a first axial surface and an opposing second axial surface of a roll housing retaining plate. The seal is biased into contact against one of the axial surfaces with a pressurized fluid source, such as compressed air. As the seal wears during roll neck operation the pressurized fluid maintains biasing contact between the seal and the axial surface. The remainder of the intact seal is remains pressed into contact with the mating, opposing axial surface, for example that of a roll flinger or a retaining plate. Advantageously the seal is housed in a stationary retaining plate that is in opposed axial relationship with a rotating flinger. | 03-28-2013 |
20140015200 | INTER STAGE SEAL HOUSING HAVING A REPLACEABLE WEAR STRIP - An inter stage seal housing for a turbine engine having upper and lower half inter stage seal housings in which a contact sealing surface of the seal housing is restored after an interval of engine operation. The contact sealing surface is restored by fitting a replaceable wear strip on the downstream sealing surface of the seal housing. In order to fit the replaceable wear strip, a circumferential groove is machined along an outer peripheral edge of the seal housing. The groove is machined to include axial location and radial retention such that the wear strips can be slid into the upper half and lower half inter stage seal housing circumferentially from the horizontal joint. The groove includes through holes and the wear strips include corresponding threaded holes such that the wear strips can be fastened in the groove by fasteners and fastener retention hardware. | 01-16-2014 |
20140131952 | ADJUSTABLE FACE SEAL ASSEMBLY - An adjustable dynamic face seal assembly for an EWGU is provided. The adjustable dynamic face seal assembly includes a first seal ring having a first seal face and a second seal ring have a second seal face. The first seal ring is mounted in a first seal ring retainer, and the second seal ring is mounted in a second seal ring retainer. The adjustable dynamic face seal assembly also includes a first flexible seal element supported by the first seal ring and retained by the first seal ring retainer, and a second flexible seal element supported by the second seal ring and retained in the second seal ring retainer. Adjustment members are selectively insertable to provide a static seal at the sealing interface. | 05-15-2014 |
20140167359 | Split Seal Assembly and Method - A split mechanical end face seal assembly has a split gland plate assembly, a split mating seal ring assembly, a split primary seal ring assembly and a split biasing assembly. The segmented mating seal ring is axially and radially supported on the segmented mating ring adapter by resilient connector strips as pre-assembled sub-assemblies and the resilient connector strips axially non-rigidly support the mating seal ring within said mating ring adapter assembly. An axially movable primary sealing ring assembly includes a segmented primary seal ring. The biasing assembly is pre-assembled into the gland plate assembly and urges the primary seal ring into sealing relation with the mating seal seal ring. A method of installation includes resilient axial and radial support of the mating seal ring segments in mating ring adapter segments by the resilient connector strip for installation as a pre-assembled sub-assembly. It further includes pre-assembly of semi-circular shaped biasing ring segments into segments of the gland plate assembly. | 06-19-2014 |
20140175747 | COOLED MECHANICAL SEAL ASSEMBLY - The present invention relates to a mechanical seal assembly, comprising: a rotating seal ring ( | 06-26-2014 |
20140291936 | MATRIX SPLIT ROTARY SEAL - The present invention provides a rotary seal assembly for providing sealing on a rotating shaft or other suitable device. The seal assembly seals against a rotating shaft or other piece of moving equipment to prevent the leakage of fluids. In some embodiments, a split rotary seal assembly employing an energizer, housing, and a rotational seal element such as a matrix is provided. The energizer energizes the matrix to enhance the sealing properties of the assembly. Furthermore, the matrix conforms to the surface of the shaft, and moves radially with the shaft to provide an effective seal in high wear or runout applications. | 10-02-2014 |
20140327211 | COOLED SEAL - Seals having incorporated heat pipes are disclosed relating to pumps and other comparable sealing equipment that may include a seal face, a cavity, a wicking material within the cavity, and a working fluid within the cavity. The seals may be used as a pump seal rings and in other applications having comparable heat transfer requirements. | 11-06-2014 |
20140346736 | Device for Supporting Mechanical Seal Faces - A device is for supporting within a coating chamber a mechanical seal face ( | 11-27-2014 |
20150035232 | ADJUSTMENT MECHANISM FOR PUMP SEAL - An adjustment mechanism ( | 02-05-2015 |
20150130137 | APPARATUS AND SYSTEMS FOR SEALING A ROTARY MACHINE USING A SELF-CLEANING FACE SEAL - A self-cleaning hydrodynamic face seal for use with a rotary machine is provided. The hydrodynamic face seal includes a seal ring having a radially-extending seal face. In addition, the hydrodynamic face seal includes at least one brush coupled to the seal ring. The at least one brush includes a plurality of flexible elements extending away from the radially-extending seal face of the face seal ring. | 05-14-2015 |
20150354397 | STIFFNESS CONTROLLED ABRADEABLE SEAL SYSTEM WITH MAX PHASE MATERIALS AND METHODS OF MAKING SAME - A stiffness controlled abradeable seal system for a gas turbine engine includes a cantilevered arm that supports one of a rotating seal surface and a static seal surface, a stiffness of the cantilevered arm controlled to achieve a desired operational temperature at a seal interface. | 12-10-2015 |
20150361838 | METHOD AND APPARATUS FOR ROTATING SLEEVE ENGINE HYDRODYNAMIC SEAL - An improved sealing system for a poppet valve rotating sleeve internal combustion engine with rotating liners. A hydrodynamic face seal assembly includes a spring pre-load assembly provides a uniform loading to a primary sealing ring. A secondary seal is provided between the primary sealing ring and the cylinder head. Hydrodynamic face seal features are provided either on the mating face of the primary sealing ring or on the annular face of the rotating liner. The hydrodynamic face seal features include an inner sealing zone, and an outer loading zone with a plurality of hydrodynamic lift pads, and dam features which create converging surfaces. A lubricant is provided to the annular face of the rotating liner, so that a lubricant layer can be maintained between the primary sealing ring mating face and the rotating liner. | 12-17-2015 |
20160047476 | HYDRODYNAMIC MATING RING WITH INTEGRATED GROOVE INLET PRESSURE CONTROL - A hydrodynamic mating ring of the present disclosure may include a sealing face, a hydrodynamic groove disposed in the sealing face, an impeller portion, and an inlet conduit configured to provide fluid communication between the hydrodynamic groove and the impeller portion. A method of sealing may include providing a mating ring having a sealing face, a plurality of hydrodynamic grooves disposed in the sealing face, a plurality of impeller portions, and a plurality of inlet conduits configured to provide fluid communication between respective ones of the plurality of hydrodynamic grooves and the plurality of impeller portions. The method may include rotating the mating ring, and increasing at least one of a pressure, a volume, and a flow rate of fluid to the hydrodynamic grooves via the plurality of impeller portions drawing said fluid into the plurality of inlet conduits. | 02-18-2016 |
20160061331 | SELF-LUBRICATING AND DRAINING, CONTACTING FACE, ROTATING SHAFT SEAL - A shaft seal assembly and method for pressure relief in a shaft seal assembly includes a stator having a static seal and a rotor rotatable relative to the stator that has a rotating seal. The static seal has an end face in sealing engagement with an end face of the rotating seal. At least one of the static seal and the rotating seal includes an annular passage defined in the respective end face and at least one axial passage extending through the respective seal. Lubricant drains and fills through the at least one axial passage and the annular passage at the sealing surfaces of the end faces. The end faces maintain sealing engagement during rotation of the rotor. | 03-03-2016 |
20160076652 | UNITARY FACE SEAL ASSEMBLY - A metal face seal assembly includes a casing with a first portion that rotates with respect to a second portion. Inside the casing is a face seal assembly with a first seal member that has a first sealing face that rotates with respect to a second seal member that has a second sealing face. At least one loader is provided that is compressible against the casing and exerts a biasing force against one of the first seal member and the second seal member to bias together the first seal face of the first seal member and the second seal face of the second seal member. The first portion and the second portion can each terminate with an annular ring that are separated by a gap for an installation ring positioned in the gap that is removable after installation of the metal face seal assembly. | 03-17-2016 |
20160131261 | MECHANICAL SEAL SUPPORT SYSTEM - A seal support system, for use in combination with a mechanical seal installed on a piece of rotating equipment, includes a pressure vessel, one or more fluid inlets and connecting pipework between the one or more fluid inlets and the mechanical seal. A device is included to alter the fluid flow, so that a portion of the seal support system may be isolated for various purposes, such as, for example, cleaning or repurposing. | 05-12-2016 |
277307000 | Formed by flexible projection | 15 |
20080237992 | TWO COMPONENT PIN SEAL - A pair of pivoting parts are held together with a pin, with a first part, such as a rod end of a hydraulic actuator, positioned between two flanges of a bracket, with the flanges having surfaces mating with sides surfaces of the rod end. A seal is placed in each of a pair of recesses on the opposite side surfaces of the rod end to provide an annular seal around the surface of the pin as the parts pivot, and also having a flange forming a side seal that seats on one of the mating surfaces of the bracket at a location spaced outwardly from the pin and extending annularly around the pin. The seal portion engaging the pin is spaced inwardly from the respective side surface of the bracket, and the outer annular lip seals a space surrounding the pin to form a pocket to receive grease that is used to lubricate the pin relative to the rod end. | 10-02-2008 |
20080309013 | Mechanical Seal With a Central Component - A mechanical seal assembly includes a rotary component having a rotary seal face, a stationary component having a stationary seal face and a central component arranged between the rotary component and the stationary component, which has a first seal face arranged adjacent the rotary seal face and a second seal face arranged adjacent the stationary seal face. The central component is configured so that, when seal face rotation of the rotary seal face or the stationary seal face, or both, occurs, the first seal face is configured to form a seal with the rotary seal face and the second seal face is configured to form a seal with the stationary seal face. The central component is arranged so that the first and second seal faces are aligned substantially parallel to the rotary and stationary seal faces, respectively. The central component is configured so that contact seals, or non-contact seals, form between the adjacent seal faces. | 12-18-2008 |
20090091088 | Sealing system for a turbomachine - A sealing system for a turbomachine for sealing an annular gap between a rotor and a stator of the turbomachine has a sealing body which can be inserted into the annular gap and can bridge the latter, said sealing body being embodied elastically and thereby able to compensate for a height variation of the annular gap, and at least one sealing ring which is embedded in the sealing body such that the sealing ring is held by the sealing body in the annular gap between the rotor and the stator. | 04-09-2009 |
20090146379 | SEAL ASSEMBLY FOR HIGH PRESSURE DYNAMIC AND STATIC SERVICES - Seal assemblies and methods for forming them are described. Aspects of the seal assemblies include a seal ring made of a relative soft material supported by a specially configured backing ring made of a much higher modulus material, such as ferrous and non-ferrous metal or engineered plastic. The seal assemblies may optionally include a retaining ring to prevent slippage relative to the environment or housing in which they are placed and to prevent shuttling. The seal assemblies may also optionally include an energizer to alter the force generating by a sealing lip on the seal ring. | 06-11-2009 |
20100148446 | SEAL ASSEMBLY AND METHOD FOR MAKING AND USING THE SAME - A seal assembly including a seal body; an augmentation configuration partially radially displaced from the seal body; a filler material at least partially disposed between the seal body and the augmentation configuration and method. | 06-17-2010 |
20100201072 | ONE PIECE SHAFT SEAL APPARATUS AND METHOD - A one-piece shaft seal apparatus and related method are disclosed for use in machines having a rotating shaft and a rolling-element bearing. The integral shaft seal apparatus can include a substantially rigid, annular frame secured between a machine support structure and a rolling-element bearing surrounding a rotatable shaft, and some combination of a bearing seal portion extending from the frame, a housing seal portion that can be secured between the rolling-element bearing and the machine support structure, and a shaft seal portion extending between the frame and the shaft, wherein fluid in the race can be separated from fluid sealed by the shaft seal portion. The bearing seal portion can snap in place between the races of the bearing, while the shaft seal portion can be at least partially in fluid-tight contact with the shaft. | 08-12-2010 |
20110084454 | INTERNALLY PRESSURIZED SEALS - A seal assembly having a first seal ring sealed to a rotatable component and a second seal ring sealed to another rotatable component, and the second ring is urged towards the first ring such that sealing faces of the seal rings engage. A process chamber is formed inside the seal rings and opens to an outside the seal rings, and a barrier chamber outside of the seal rings opens to inside the seal rings. A shroud shields the external surface of the seal rings from process fluid in the process chamber such that heat transfer from the process fluid to the seal rings occurs at outer regions of the seal rings adjacent the sealing faces, and a sleeve is secured inside the seal rings such that heat transfer between the seal rings and barrier fluid in the barrier chamber occurs at radially extending surfaces of the seal rings adjacent the sealing faces. | 04-14-2011 |
20130200569 | LEAF SEAL - A leaf seal effects a seal between two, coaxial, relatively rotating components. The leaf seal has an annular pack of stacked leaves or a plurality of axially arranged annular packs of stacked leaves. The or each pack is mountable to one of the components with its leaves extending towards the other component such that the leaf edges of the pack are presented for wiping contact with the other component. The leaf seal further has upstream and downstream coverplates at the respective axial ends of the seal. Each coverplate is spaced from the adjacent annular pack by a respective axial gap. When viewed in the axial direction, each coverplate covers at least a portion of the radial extent of the adjacent pack. The upstream and/or the downstream coverplate is flexible to axially deflect under differential pressures which the seal experiences in operation. | 08-08-2013 |
20140197599 | SEALING ARRANGEMENT AND USE THEREOF - A sealing arrangement includes a double seal for sealing two chambers which are to be sealed off from one another and are each filled with a medium to be sealed. The double seal includes a first sealing ring disposed on a first side of the double seal and a second sealing ring disposed on a second side of the double seal. Each of the sealing rings has at least one dynamically stressed sealing lip contacting a surface to be sealed of a first machine element in a sealing manner. The sealing lips are arranged such that there is an axial distance between the sealing lips of the first and second sealing rings that are axially closest to one another. The first machine element is movable backwards and forwards in a translatory manner with a stroke. The axial distance is greater than the stroke. | 07-17-2014 |
20140361490 | Pressure Resistant Static and Dynamic Seal Assembly and Method - A shaft sealing assembly for static and dynamic sealing includes a stator member attached to a housing and a rotor member attached to a shaft rotatable about an axis. The rotor member includes first and second pocket sections extending from upper and lower radial flanges extending in a cantilevered fashion from a tubular member. At least one static sealing member is attached to and encapsulates each pocket section. Each static sealing member presents a core portion and a pair of radial lips extending from the core portion. The stator member presents an annular wall extending to inner walls inclined conically to a central radial rim or flange separating two pocket portions and the static sealing members presenting a contact and frictionally engaging with the central radial rim as the rotor member is at a stand-still or static position. | 12-11-2014 |
20150008645 | PUMPING SEAL WITH ALIGNED SPRING - A seal assembly for sealing a space between a housing and a rotary shaft includes a generally annular sealing member having a central axis and inner and outer circumferential surfaces extending about the axis, at least a portion of the inner surface providing a sealing surface engageable with the shaft outer surface so as to define a seal interface with opposing axial ends. The sealing surface is configured to direct substances entering the interface toward at least one of the axial ends. Further, an annular biasing member is disposed about the sealing member outer surface and configured to exert a radially-inwardly directed force on the sealing member so as to generate contact pressure within the seal interface. The biasing member is arranged on the sealing member such that at least a portion of the biasing member extends axially in general alignment with at least a portion of the sealing surface. | 01-08-2015 |
20150130138 | ROTARY MACHINE ASPIRATING SEAL ASSEMBLY AND METHOD OF ASSEMBLING THE SAME - An aspirating face seal for use with a rotary machine includes a rotating seal ring including a radially outer surface that includes an oblique portion. A stationary seal ring is coupled proximate the rotating seal ring such that a first gap is defined therebetween. The stationary seal ring is movable along a centerline axis of the rotary machine between an open position and a sealed position, and includes an extension member that extends across the first gap. An auxiliary seal includes at least one seal tooth that includes a seal tooth tip. The at least one seal tooth extends radially inward from the extension member such that a second gap is defined between the seal tooth tip and the oblique portion. | 05-14-2015 |
20150145215 | CARTRIDGE SEAL FOR AN APPLIANCE AND METHOD OF USING AND MANUFACTURING - A cartridge seal assembly can be sued for sealing an annular space between a rotating shaft and an opening in a housing of an appliance. The cartridge seal assembly includes a wear sleeve and an elastomeric seal. The wear sleeve includes a cylindrical wall sized to fit the rotary shaft and an radially outwardly extending flange, the flange comprising a peripheral edge. The elastomeric seal includes a primary seal configured to form a static seal against the cylindrical wall of the wear sleeve, an outer body configured to engage a surface of the housing defining the opening, and a retaining feature configured to engage the peripheral edge of the wear sleeve. The wear sleeve is preassembled with the elastomeric seal. | 05-28-2015 |
20160053894 | SEALING RING AND USE THEREOF - A sealing ring with a dynamically loaded sealing lip having a sealing edge and a tension element for stabilizing the sealing lip in the radial direction, wherein: the tension element is arranged in a mounting groove; the mounting groove is arranged in the sealing lip on the side facing radially away from the sealing edge and has a mounting opening on the side facing radially away from the sealing edge, which opening is delimited by two guide webs arranged so as to be adjacent to each other at a spacing in the axial direction; the sealing lip is articulated, on its side facing axially away from the sealing edge, to a support member with a joint; and the sealing lip and the support member delimit, with their sides which radially face each other, a substantially C-shaped joint space which is open on one side in the axial direction. | 02-25-2016 |
20160146348 | SHAFT SEAL AND A METHOD OF OPERATING SUCH A SHAFT SEAL - The invention relates to a shaft seal ( | 05-26-2016 |