Abstract: A seal system may include a static housing, a carbon seal positioned in the static housing, a runner having a sealing surface aligned with the carbon seal, a number of electromagnets positioned in the static housing, and a controller circuitry. The controller circuitry may control a variable flow of electric current to control an electromagnetic field respectively generated by each of the electromagnets. The controller circuitry may variably apply the electromagnetic field to move at least one of the carbon seal or the runner and correspondingly adjust an applied force loading of an interface of the carbon seal and the sealing surface of the runner.

Abstract: Sealing arrangements and turbomachines are provided. A sealing arrangement for a turbomachine includes a transition duct having an upstream end and a downstream end. The transition duct includes an aft frame that circumferentially surrounds the downstream end of the transition duct. A stage one nozzle spaced apart from the aft frame and defining a gap therebetween. A sealing assembly extends across the gap. The sealing assembly includes a first seal link magnetically coupled to the aft frame. The sealing assembly further includes a second seal link magnetically coupled to the first seal link and the stage one nozzle.

Abstract: A bearing protector includes a static component fixed relative to a housing, in which a stationary sealing face profile is retained and a rotational component for fixing relative to a shaft with the static and rotational components held axially relative to each other. The rotational component has an annular sealing face profile energized by way of one or more magnetic elements retained within the static component to generate a positive sealing face contact between the stationary sealing face and rotational sealing face profiles. The magnets elements are held within recesses in the static component and extend radially inwards of the recesses.

Abstract: A deep groove ball bearing with a rotor is disclosed by the present invention.

Abstract: A carbon seal assembly comprises an annular member adapted to be secured to a structure. An annular seal runner is sealingly mounted to a shaft to rotate therewith, with the seal runner being made of a material complementary to that of the annular member for magnetic attraction therebetween. An annular carbon seal element is mounted to the annular seal runner to rotate therewith and positioned in a gap between the annular member and the annular seal runner, the annular carbon seal element having an annular wear surface abutting against a face of the annular member. A cross-sectional area of the annular carbon seal element increases as the axial dimension of the annular seal runner decreases for at least a part of the seal.

Abstract: A thermal compensator for a motor seal, includes: a guide tube for receiving a shaft of the motor seal; a metallic bag disposed around the guide tube and having an expansion profile formed in at least a portion thereof to accommodate radial and circumferential expansion of the metallic bag; a pair of flanges attached to opposite ends of the metallic bag; and a pair of adapters fastened to the respective flanges and receiving respective ends of the guide tube.

Abstract: A magnetic rotary seal with improved drain back is provided, comprising a housing adapted to matingly engage a fixed opening, wherein the housing includes an annular retaining member. A stator is positioned within the housing, wherein the stator includes a first resilient sealing member adapted to sealingly contact the housing, and a first frictional sealing face. A rotor is positioned between the annular retaining member of the housing and the stator, wherein the rotor includes a second resilient sealing member adapted to sealingly contact a shaft, and a second frictional sealing face. Magnets are operatively positioned between the stator and the rotor urging engagement of the first frictional sealing face of the stator with the second frictional sealing face of the rotor. The housing further includes an annular channel for receiving lubricating fluids from within the seal, and a drain port in fluidic communication with the channel.

Abstract: A carbon seal assembly comprises an annular seal runner adapted to be sealingly mounted to a shaft to rotate therewith. An annular member is secured to a structure, the annular member having an annular body and a projection extending from the body toward the seal runner in an axial direction relative to an axis of the runner. A axial gap is defined between the member and the seal runner when secured to the shaft and structure respectively, with the projecting extending into only a portion of the gap, such that the gap defines a first width portion and a second width portion, with the member and the seal runner being made of complementary materials for magnetic attraction therebetween. An annular carbon element is mounted to the seal runner to rotate therewith and positioned in the first width portion of the gap, the carbon element having an annular wear surface abutting against the annular member, a plane of the annular wear surface being axially offset from the second width portion of the gap.

Abstract: A hydrodynamic magnetic seal includes a magnetic mating ring and a sealing ring attracted to the magnetic mating ring. The magnetic mating ring and/or the sealing ring include hydrodynamic grooves configured to create a separation film between the magnetic mating ring and the sealing ring to reduce friction.

Abstract: The airtight magnetic seal, in a compact single body, made of two concentric sections, an inner section (1a) and an outer section (1b), unitized, which are able to rotate independently. These sections are engaged and squared to create a permanent contact-seal inside in combination with two labyrinth-seals type and associated drains at each end, and a pressure relief safety means, when the seal is embedded into an annulus in a rotary operational assembly.

Abstract: A non-contacting rotary face seal assembly includes a first sealing member, including a first sealing face and a first magnetic element; and a second sealing member, including a second sealing face and a second magnetic element. The first and second magnetic elements of the first and second sealing members provide a magnetic repulsion force between the first and second magnetic elements such that the magnetic repulsion force separates the first and second sealing faces before hydrodynamic or hydrostatic forces associated with rotation of the second sealing member become sufficient to prevent the first and second sealing faces from contacting.

Abstract: A mechanical seal has an axially floating seal face (21) in sliding contact with an axially stationary seal face (22). A biasing means (33), such as a magnet, biases the floating seal face towards the stationary seal face. The axially floating seal face and the biasing means are rotationally fixed relative to each other and the axially stationary seal face is free to rotate relative to the axially floating seal face. The seal may be used, for instance, as a bearing protector or isolator.

Abstract: A magnetorheological (MR) piston ring includes an MR-piston-ring body disposable within a cylinder of an MR damper. The MR-piston-ring body has a radially inner surface defining a boundary of a longitudinally-extending MR passageway. The MR-piston-ring body includes a surface portion which is slidingly engagable with the cylinder and which has first and second longitudinal ends. The surface portion includes at least one surface groove each defining a secondary MR passageway and extending from the first to the second longitudinal end or each defining an MR cavity extending from one of the first and second longitudinal ends toward, but not to, the other of the first and second longitudinal ends. An MR damper including the MR piston ring is also described.

Abstract: A seal assembly has an inner wear sleeve with an axially extending tubular body. A flange extends radially outwardly from the body. An outer seal component has an axially extending tubular outer wall with a flange extending radially inwardly therefrom to support at least one dynamic seal lip in sealing engagement with the inner sleeve body. The outer seal component includes an annular retention lip disposed axially outwardly of the wear sleeve flange. The retention lip extends radially inwardly of a radially outer edge of the flange and is deflectable in an axial direction to enable the flange of the wear sleeve to be forced axially thereby during assembly, whereupon the retention flange returns to its non-deflected position to inhibit removal of the wear sleeve in the reverse axial direction. The annular retention flange has at least one axially extending debris expulsion slot for the escapement of debris.

Abstract: A non-contacting rotary face seal assembly includes a first sealing member, including a first sealing face and a first magnetic element; and a second sealing member, including a second sealing face and a second magnetic element. The first and second magnetic elements of the first and second sealing members provide a magnetic repulsion force between the first and second magnetic elements such that the magnetic repulsion force separates the first and second sealing faces before hydrodynamic or hydrostatic forces associated with rotation of the second sealing member become sufficient to prevent the first and second sealing faces from contacting.

Abstract: A seal assembly for an earth boring bit uses a magnet to provide a desired contact force. The seal is located between a rotating cone and a stationary bearing pin of the drill bit. The seal has a non rotating metal face that is in sliding engagement with a seal face in the cone that rotates with the cone. The non rotating seal face is provided by a carrier ring that encircles the bearing pin. A magnet is mounted to the carrier ring to provide an attraction force maintaining the carrier ring in contact with the rotating seal face in the cone. An elastomeric seal ring seals between the carrier ring and the bearing pin to prevent rotation of the carrier ring.

Abstract: A liquid pump has a sealing mechanism utilizing magnets. The sealing mechanism includes an annular rotating seal attached to the lower surface of a rotary base member fixed to the motor rotating shaft. Additionally, a flexible stationary seal is joined and separated with respect to the rotating seal. Movable magnets are disposed on the rotary base and are adapted to be displaced by centrifugal force due to a rotation of the rotary base member. A stationary magnet is disposed on the upper-surface side of a vertical sliding member to which the flexible stationary seal is fixed. The flexible stationary seal utilized has a cylindrical body. At the upper and lower end portions and the side surface portion, connecting portions to the stationary and movable members are formed. The middle portion has an elastic portion is formed on it.

Abstract: The invention herein is a seal to seal a rotating shaft to housing. The seal has a stator and a rotor, magnetically and mechanically coupled. The mechanical couple is provided through an interlocking annular groove provided on one component and a flange face on the other component. The mechanical couple allows the two components to become interconnected once a predetermined range of free movement of the rotor is exceeded. The stator and rotor are also mechanically coupled through a plurality of magnets positioned on either the stator or rotor. After the predetermined range is exceeded, the rotor slips along the shaft while the stator remains fixed, maintaining a seal in during axial movement of the rotating shaft.

Abstract: A seal assembly for co-operation with a shaft comprising a seal member which, in use, in a first position, forms a seal against the shaft, a seal housing for retaining the seal member, means for applying a radially inward force to the seal member and means for applying a radially outward force to the seal member so that, when the means for applying a radially outwards force is operated, the seal member is dilated to a second position thereby enabling the seal assembly and the shaft to be fitted and disassembled in conventional manner, when the means for applying a radially outward force is removed the means for applying a radially inward force to the seal member returns the seal member to the first position.

Abstract: A seal arrangement (40) between relatively movable components (42,48) includes at least one magnet (54) on a first component (48) and at least one magnet (56) on the second component (42). A clearance (55) is defined between the at least one magnet (54) on the first component (48) and the at least one magnet (56) on the second component (42). Springs (58) bias the at least one magnet (54) on the first component (48) and the at least one magnet (56) on the second component (42) towards each other. The at least one magnet (54) on the first component (42) and the at least one magnet (56) on the second component (42) are arranged to repel each other against the spring (58) to control the clearance (55).

Abstract: A seal assembly includes a seal element having a plurality of movable seal segments and further includes a plurality of actuators, each associated with a respective one of the seal segments. Each of the seal segments has a coil that generates electrical energy in the presence of a varying magnetic field. Each of the actuators receives energy from the associated seal segments and in response thereto produces a force that causes the segment to move toward or away from a surface on an opposing seal member.A method for fabricating a seal element for a gas turbine engine includes providing a wafer, forming seal segments on the wafer, dividing the wafer into a plurality of seal segments, and arranging at least two of the plurality of seal segments into a seal element.

Abstract: The shaft seal assembly of cartridge designed for sealing shafts entering or exiting enclosed vessels. The enclosed vessels may have a pressure different from the atmospheric pressure and the seal will normally prevent leakage from or into the vessel. The seal is accomplished by having a plurality of fluid pressures presented to different faces or portions of the seals. Utilization of these pressures provides a seal between the faces of the rotating parts and the stationary parts of the seal with a minimum of friction. This reduced friction is a result of some amount of air movement between the sealing faces. This air movement into and out of the seal, resulting from fluid pressure differentials, will also carry away any contaminants that may get into the seal, either to the ambient atmosphere or to a recovery system. The seal is designed to accept axial and radial shaft displacement while maintaining a positive seal between the vessel and the atmosphere.

Abstract: A magnetic rotary seal is provided for sealing a shaft to a housing, comprising a rotary seal head having a first annular surface; a first O-ring disposed between the rotary seal head and the shaft for sealably coupling the rotary seal head to the shaft; a housing adaptor disposed within the housing; a magnetic stationary ring disposed within the housing adaptor, wherein the stationary ring includes a second annular surface; a second O-ring disposed between the housing adaptor and the stationary ring for sealably coupling the stationary ring to the housing adaptor; and a plurality of magnets disposed within the rotary seal head for urging the first annular surface against the second annular surface. The second O-ring is held within opposing circumferential grooves formed in the housing adaptor and the stationary ring, which prevents the stationary ring from leaving the housing adaptor.