Abstract: To protect moveable—mostly sliding parts from dirt porous filter material is placed in a closest way directly on one of the moveable partners; for instance directly in both fronts of a ball bearing running submerged in sea water to repel and absorb dirt particles on the way to the inner rolling parts. This will extend the service live under difficult conditions. In case of a mechanical shaft seal a filter ring is placed directly besides the sealing ring sliding together on a seat ring. Such filter ring protects the sensitive sliding surfaces much more completely than dirt rings in use, because they not only repel dirt, but absorb single dirt particles in its pores even in the sliding surface.

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. Additional grooves are contained on the shaft-side face of each sealing ring segment. The additional grooves direct and create pressurized air within the dead end circumferential groove, either directly or indirectly maintaining a seal between the ring segments and the shaft.

Abstract: A mechanical face seal includes a rotating counter ring having a sealing surface and a stationary face seal ring having a sealing surface. The sealing surface of the counter ring is disposed opposite from the sealing surface of the face seal ring. The sealing surfaces of the counter ring and the face seal ring bear against each other.

Abstract: The present invention provides a mechanical seal sliding member with high lubricating characteristics, in which the coefficient of friction and the temperature of sliding surfaces are lowered and stabilized without excessive leakage. In the mechanical seal sliding member of the present invention, on the sliding surface 2, a plurality of grating sections 5 are formed separately in each of which a plurality of linear shape ridge portions parallel to each other are formed in a predetermined region with a predetermined pitch. The linear shape ridge portions of the plurality of grating sections are formed as inclined at a predetermined angle to a sliding direction of the sliding surfaces 2. Such periodic structure can improve the lubricating characteristics for lubrication.

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. 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.

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: The invention relates to a slide ring seal, in particular a running gear seal, at least comprising a slide ring, which is in operative connection with a counter running surface, in particular a counter ring, the slide ring having a sliding surface and an accommodating area for an elastomer spring element, at least the sliding surface of the slide ring being provided with a convex contour.

Abstract: A circumferential seal system for sealing a high pressure region from a low pressure region separated by a runner with an outer circumferential surface and a seal ring disposed about the outer circumferential surface is described. The seal system includes a plurality of groove sets separately disposed along the outer circumferential surface. Each groove set further includes at least two grooves. At least one groove within each groove set exerts a lifting force via a fluid from the high pressure region onto the seal ring as the runner translates with respect to the seal ring along an axis substantially perpendicular to the rotation of the runner. The continuous feed of fluid onto the seal ring ensures a thin film between the seal ring and the runner regardless of their relative arrangement during axial excursions of the runner resulting from conditions within a turbine engine.

Abstract: An aspect of the invention provides a sliding component in which a phase made of liquid and a phase made of gas, which are formed in a sliding portion, are stabilized. A sliding component constitutes one of two sliding components that rotate relatively, and planar end faces of the two sliding component slide on each other. In the sliding component, a plurality of dimples is arrayed in a sliding surface such that, in a phase made of liquid and a phase made of gas, the phase made of the gas is positioned when the two components rotate relatively. The phase made of the liquid and the phase made of the gas are formed so as to revolve about rotation centers of sliding portions of the two components.

Abstract: A face seal for a gas turbine engine comprises a seal body that has a contact face to engage a rotating surface. The contact face is defined as an area extending radially between an inner diameter of the seal body and an outer diameter of the seal body at one seal end providing a radial width. The radial width is between greater than 0.15 inch (3.81 mm).

Abstract: A steam turbine and a seal member between stationary components of a steam turbine are disclosed. The seal member is annular, with a cross-section having an elongated seal member and bulbous ends that are adapted to be inserted into grooves in the stationary components to form point seals between the bulbous ends and axial faces of the grooves. The bulbous ends are designed to rotate with respect to the axial faces of the annular grooves and the elongated member is designed to flex to maintain the point seals in response to a realignment of the components.

Abstract: A circumferential seal system for sealing a high pressure region from a low pressure region separated by a runner with an outer circumferential surface and a seal ring disposed about the outer circumferential surface is described. The seal system includes a plurality of groove sets separately disposed along the outer circumferential surface. Each groove set further includes at least two grooves. At least one groove within each groove set exerts a lifting force via a fluid from the high pressure region onto the seal ring as the runner translates with respect to the seal ring along an axis substantially perpendicular to the rotation of the runner. The continuous feed of fluid onto the seal ring ensures a thin film between the seal ring and the runner regardless of their relative arrangement during axial excursions of the runner resulting from conditions within a turbine engine.

Abstract: A face seal for a gas turbine engine comprises a seal body that has a contact face to engage a rotating surface. The contact face is defined as an area extending radially between an inner diameter of the seal body and an outer diameter of the seal body at one seal end. A ratio of the outer diameter to the inner diameter is at least 1.054.

Abstract: A circumferential seal system for sealing a high pressure region from a low pressure region separated by a runner with an outer circumferential surface and a seal ring disposed about the outer circumferential surface is described. The seal system includes a plurality of groove sets separately disposed along the outer circumferential surface. Each groove set further includes at least two grooves. At least one groove within each groove set exerts a lifting force via a fluid from the high pressure region onto the seal ring as the runner translates with respect to the seal ring along an axis substantially perpendicular to the rotation of the runner. The continuous feed of fluid onto the seal ring ensures a thin film between the seal ring and the runner regardless of their relative arrangement during axial excursions of the runner resulting from conditions within a turbine engine.

Abstract: One embodiment of the face seal described herein includes a seal seat and a seal element carried by a seal housing. The seal element cooperates with the seal seat to establish a seal. The housing includes a seal element support and a shroud. The seal housing is made of a parent material and the shroud has a tip impregnated with a second material.

Abstract: A compressor includes a male rotor (26) having a screw-type boy portion (30) extending from a first end (31) to a second end (32) and held within a housing assembly for rotation about a first rotor axis (500). A female rotor (27, 28) has a screw-type female body portion (33, 34) meshed with the male body portion and extending from a first end (35, 36) to a second end (37, 38) and held within the housing assembly for rotation about a second rotor axis (501, 502). An end seal (120) has a first surface (126) engaging the female body portion first end and being asymmetric around the second axis.

Abstract: A transition-to-turbine seal (320) including an upstream portion (322) adapted to engage a flange (416) of a transition (400). The upstream portion (322) may be U-shaped in cross-sectional profile and include a primary wall (324) that includes a proximal section (325) and a distal section (326) relative to a hot gas path (170). The proximal section (325) includes a plurality of recesses (327) which are spaced apart and separated by intervening wall (328). In each recess (327) is provided one or more outlets (329) of cooling fluid holes (339). The outlets (329) communicate via the cooling fluid holes (339) with a supply of compressed cooling fluid, such as compressed air that is provided from the compressor. During operation the outlets (329) release this fluid into the respective recesses (327). The flow of cooling fluid provides for a more uniform cooling effect that includes impingement and convective cooling.

Abstract: A mechanical seal device includes a rotational seal ring connected to a rotational shaft, having a rotational seal surface and arc-shaped grooves arranged on the rotational seal surface. The grooves are sectionalized by partition walls. A stationary seal ring has a stationary seal surface facing the rotational seal surface of the rotational seal ring. A spring biases the stationary seal ring against the rotational seal ring. Outlet portions are formed on the stationary seal surface of the stationary seal ring and connect with a fluid supply path for supplying a pressure fluid. A circumferential direction length (W3) of each outlet portion is made to be ½ of a circumferential direction length (W1) of each partition wall or longer (W3?W1/2); and a circumferential direction length (W3) of the outlet portions is made to be shorter than a circumferential direction length (W2) of the arc-shaped grooves (W3<W2).

Abstract: A sealing assembly for sealing between a first portion (12, 14) of a track and a second portion (22, 24) of the track that is at least pivotable relative to the first, comprising the following features: a sealing ring (40) for sealing a lubrication chamber between the portions (12, 14, 22, 24), which are pivotable relative to one another, the sealing ring having an annular sealing edge (42) provided for sealingly abutting on an opposing surface of one of the portions (22), an elastic ring (60) for permanently abutting on the other of the portions (14) and for applying pressure to the sealing ring, the elastic ring having an axially-projecting, hollow cylinder-like sealing lip (62), which is provided for a substantially radial enclosure of the sealing ring in the region of a sealing edge and, in sealing assemblies assembled as intended, likewise for sealing abutment on the opposing surface (22), and a support ring (50) disposed between the sealing ring (40) and the elastic ring (60).

Abstract: A seal is provided for sealing two adjacent components of a gas turbine engine. The seal has first and second sealing surfaces that operate to seal the adjacent components to create an effective seal therebetween. Additionally, the seal has a first end and a second end, with the second end having a necked down portion, which is configured to internally engage the first end in a sliding, overlapping manner.

Abstract: A seal ring arrangement generally includes a pair of opposed seal rings which define a shaft seal to prevent leakage along the shaft of rotary equipment. A seal face treatment process has been developed using seal ring machining equipment which has a laser unit that forms micro-topography depth features in the seal face and then performs a material surface treatment process to selectively alter the conductivity of the seal face so as to virtually eliminate electro-corrosion in the seal rings. The seal rings preferably are provided in a conventional combination of a carbide seal ring material for one of the seal rings and a silicon carbide material for the other seal ring. The laser machining and the laser treatment processes are preferably applied to the silicon carbide material.

Abstract: A typical rotary face seal employs a seal ring rotating relative to a sealing surface and also employs means to urge the seal ring towards the sealing surface in order to effect a seal. The seal ring may itself comprise a seal face bonded to a backing ring. In certain applications, the seal face may deform significantly as a result of the temperature variations experienced and an undesirable crowning of the seal face may occur. Such crowning may be reduced by employing an improved seal ring with anti-crowning features in which the thickness of an edge of the seal face is different from that in the middle of the seal face, or in which a relief slot is employed in the seal face. The improved seal ring is particularly suited for rotary face seals used in a rotary valve in a rotary gas separation device.

Abstract: Two embodiments of end seal design are described, each having preferably three seal lips, one of which differs in the center of its radius of curvature from the center of radius of curvature for the other two seal lips. The end seal is gently spring loaded. In this way the end seal provides a good seal and minimizes spray, spatter, and slinging, and can accommodate various plunge depths and can accommodate various angles of attack of a nozzle upon an application surface such as a web or applicator roll. The nozzle is able to have any of various user-determined angles of attack upon the application surface.

Abstract: A face seal for a gas turbine engine comprises a seal body that has a contact face to engage a rotating surface. The contact face is defined as an area extending radially between an inner diameter of the seal body and an outer diameter of the seal body at one seal end providing a radial width. The radial width is between greater than 0.15 inch (3.81 mm).

Abstract: A sealing apparatus is combined in a housing, such as a motor protector housing, having a hole extending therethrough. A shaft is movably disposed through the hole. A lip is disposed about the shaft and a ring is movably disposed about the shaft between the section and the lip. Sealing surfaces exist on opposite sides of the ring and on corresponding portions of the lip and the section. A polymeric coating is applied to at least one of the sealing surfaces. The polymeric coating may include a PEEK composite applied by an HVOF thermal spray process. A compressed spring assembly may be utilized to ensure a continuous seal.

Abstract: A seal assembly usable with a well includes a seal ring that is adapted to expand radially inwardly and radially outwardly in response to being longitudinally compressed between a first energizing ring and a second energizing ring. The seal assembly may also include a first backup ring between the seal ring and the first energizing ring and a second backup ring between the seal ring and the second energizing ring.

Abstract: A segmented shaft seal is provided for circumferentially sealing an outer surface of a rotating shaft unit. The shaft seal includes a plurality of seal ring segments disposed within a housing having a circumferential spring holding the ring segments together. The ring segments further have lift grooves defined on the circumferential inner surfaces thereof to generate a radially outwardly directed lift force acting against the inwardly directed spring force. The lift grooves have a tapered profile radially and/or circumferentially to facilitate formation of the outwardly directed lift force as well as molding of the ring segments.

Abstract: A rotation shaft seal in which a plate-shaped supporting piece, supporting a seal element from a low-pressure side, has an axis-orthogonal wall portion, a sloped wall portion, and an inner peripheral end flat wall portion at right angles with an axis in cross section cut at a plane including the axis of the rotation shaft.

Abstract: An oil seal (1A) has an outer member (2) fitted to a crankcase (100), an inner member (3) integrally rotatably fitted to a crankshaft (101), and a first movable lip (4) disposed in the gap (G1) formed by the outer member (2) and the inner member (3). The first movable lip (4) is disposed such that it is not in contact with the outer member (2) when rotation of the crankshaft (101) is stopped and that it is displaced in the direction to approach the outer member (2), coming into contact with the outer member (2) to close the gap (G1).

Abstract: A primary objective of the present invention is to decrease the friction coefficient of the sliding face of a sliding element and to improve its seal performance. The sliding element disposes a plurality of elongate dimples in its first sliding face in which forward edges of the dimples relative to a rotational direction are inclined with respect to a tangential direction of a rotational circumference. The sliding element also disposes a second sliding face which has either a plane surface or second dimples and is located in the opposite side of the first sliding face relative to the process fluid.

Abstract: A system and method for an asymmetric K-ring is disclosed. The system and method is for forming a K-ring with the dynamic sealing surface (514) closer to one edge or face (506) of the k-ring than the other edge or face (504) .

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 bellows type seal for a quick connect coupling. The bellows seal has a torroidal portion (20) with a substantially planar sealing surface at one end of the torroidal portion (20) and a bellows portion (14) at the other end of the torroidal portion (20). The bellows portion (14) extends away from the torroidal portion (20) and is semicircular in cross-section and terminates in a circumferential bead (24) extending radially outward from the bellows portion (14). The bellows portion (14) may also include a circumferential sealing bead (26) at an apex of the bellows portion (14). The torroidal portion (20) may have a metal reinforcement ring (22). The termination bead (24) of the bellows portion (14) has a part circular cross-section with a diameter greater than that of the thickness of the bellows portion (14).

Abstract: A seal face ring for use with a split mechanical seal, the ring having diametrically opposed grooves along at least a portion of the surface of the ring. The grooves provide lines of weakness for splitting the ring segmentally and are inclined relative to each other.

Abstract: Disclosed herein is a hydraulic hand tool including a frame, a hydraulic drive having a housing and a shaft, and a seal assembly. The hydraulic drive is connected to the frame. The seal assembly is located between the shaft and the housing. The seal assembly includes a first seal member, a second seal member, a carrier ring, and a retaining ring. The first seal member is in contact with the housing. The second seal member is in contact with the shaft. The carrier ring has a groove, containing the first seal member, and a recess, containing the second seal member. The carrier ring includes a polymer material configured to elastically deform in response to a hydraulic load from hydraulic fluid at the hydraulic drive. The retaining ring has an outer annular mating surface in contact with the carrier ring and an annular projection in contact with the second seal member.

Abstract: A seal device fixed to an end portion of a slider of a guide device includes: a casing; a plurality of seal members; and elastic members, wherein each seal member has a recess portion in which a rail penetrates. An inner circumferential face of the recess portion comes into contact with an outer surface of the rail when the seal member is pushed onto one side of the rail by the elastic members. The plurality of seal members are arranged in the casing in such a manner that when a seal portion of one seal member is pushed by the elastic member and contacted with one side of the rail, a seal portion of the next seal member is pushed by the elastic member and contacted with the other side of the rail.

Abstract: A rotary seal has a floating seal face in a sealing relationship with a stationary seal face, and a fluid collection cavity adjacent the floating seal face and the stationary seal face. The seal further includes a device for introducing a lubricant into the vicinity of the fluid collection cavity and a device for promoting coalescence of the lubricant, so that the lubricant accumulates in the fluid collection cavity and lubricates the seal faces.

Abstract: A seal structure of rotation member having a seal lip which is fixed to one of a rotatable member and a fixed member and has relatively slidable contact with the other. A surface to which the seal lip slidably contacts is applied with grease having basic oil kinematic viscosity of 10 to 60 mm2/sec at 40° C. and the surface to which the seal lip slidably contacts is formed with plural concavo-convex dimples.

Abstract: A scroll fluid machine includes a stationary scroll having a spiral wrap formed on an end plate and a moving scroll having a spiral wrap formed on an end plate. A polymer actuator for adjusting the amount of space between the wrap and the end plate is disposed in a recess formed at a tip of the wrap. The polymer actuator changes its shape along a height of the wrap to adjust an amount of the space. The polymer actuator also functions as a seal between the end plate and the wrap. The recess is formed such that a wall of the recess including an inner circumference surface of the wrap has a thickness different from that of a wall of the recess including an outer circumference surface of the wrap.

Abstract: A foil thrust bearing forms the primary rotating interface for a film riding face seal. This face seal includes a spring system that will allow the entire assembly to translate axially relative to a static attachment. The complete assembly will form a hybrid foil/film riding face seal that shows much promise at being sufficiently flexible to enable operation in a gas turbine engine. The seal includes a flexible top plate having a non-flat surface under its working conditions, and a spring support system to allow the top plate to accommodate axial excursions and out-of-flat distortions.

Abstract: A primary objective of a sliding element of the present invention is to decrease a friction coefficient of the sliding face and to improve seal performance thereof.

Abstract: A balance ratio for a stationary seal ring is designed to allow a seal face to be opened when, with a rotary seal ring at standstill, steam of a predetermined pressure is supplied to an endo-fluid region while a sealing-fluid region is brought into an exhausting state. On the other hand, an O-ring constituting a secondary seal portion is retained by a groove formed in a flange portion of a seal case, thereby preventing a force on the O-ring from affecting the stationary seal ring even when the steam is supplied to the endo-fluid region.

Abstract: A scraped surface heat exchanger includes a seal assembly between a rotating tube and the end housing. The seal assembly is removable by removing the tube.

Abstract: A jet pipe assembly containing at least one joint provided with a seal assembly to isolate, substantially, the fluid flowing in the pipe from the fluid external to the pipe. The dynamic member of the seal assembly is provided with both radial and cylindrical sealing surfaces.

Abstract: A gas seal assembly comprises a pair of mutually rotatable sealing members A, B, each of which has a face adjacent a gap between the two members. One of the members B is urged in a direction attempting to close the gap h which constitutes a leakage path through the seal assembly. A gas bleed arrangement 7 allows gas from a high pressure side P3 of the seal assembly to bleed into the gap at a position radially spaced between an inner diameter of the members and an outer diameter of the members A,B so as to apply a force tending to separate the members, the force decreasing as the size of the gap increases.

Abstract: A mechanical seal having a single rotatable seal ring having a pair of concentric seal faces to form a radially inner seal face and a radially outer seal face. The mechanical seal also includes first and second stationary seal rings, each having a seal face, where the seal face of the first stationary seal ring contacts the radially outer seal face of the rotatable seal ring and the seal face of the second stationary seal ring contacts the radially inner seal face of the rotatable seal ring. The seal also includes a sleeve adapted to be mounted about the rotating shaft and rotatably coupled thereto and to the rotatable seal ring, said sleeve having a flange portion that is configured for housing at least a portion of the rotatable seal ring, and a gland for housing at least partially the single rotary seal ring and the first and second stationary seal rings.

Abstract: A seal device includes a first resilient seal ring having a first resilient seal portion and first and second seal portions; and a second resilient seal ring. The first resilient seal portion urges a first seal surface of the first seal ring against the second seal surface of the second seal ring. The second seal portion mates with the first retainer portion of the first seal ring, while the first seal portion is in a sealing relation with one component. The second resilient seal ring has a second resilient seal portion, and first and second seal portions. The second resilient seal portion urges a second seal surface of the second seal ring against the first seal surface of the first seal ring, while the second seal portion mates with the second retainer portion of the second seat ring.

Abstract: A gasket, sliding about the axis of rotation of a part to be brought closer to or to be spaced apart from another part with which it provides tightness through a pair of lips provided on a ring. The gasket includes a portion of the ring capable of bending to modify the clearance between the corresponding lip and the part, the pressure prevailing in an intermediate cavity, the balance of forces on the joint and hence the clearance and the leak flow rate allowed before the gasket, which is advantageous in particular in a case of ventilation gas for refrigerating an element of the machine in controlled operating conditions.

Abstract: The present invention relates generally to a technical domain of a sliding element engaging a relative rotational motion. A primary objective of a sliding element of the present invention is to decrease a friction coefficient of the sliding face and to improve the seal performance. The element disposes dimples on at least one sliding face of a pair of relatively rotating sliding faces wherein the dimples are inclined towards a rotary direction when viewed along a radial direction. The sliding face of the sliding element also disposes a plurality of ring-formed dimple sections which form annuli of distinct diameters wherein the dimples are arranged along the individual annuli. The sliding face also disposes annular dam sections which are located between the individual dimple sections.

Abstract: A seal assembly which is secured to a rotating shaft and which seals around the shaft. The seal assembly has molded grooves adjacent to the shaft which grasp the shaft and prevent leakage.