Abstract: A rotating assembly of a gas turbine engine includes a first rotating component; and a second rotating component located radially outboard of the first rotating component, relative to an engine central longitudinal axis. A seal assembly is configured to seal between the first rotating component and the second rotating component. The seal assembly includes a shuttle located on a radial outer surface of the second component and freely axially movable along the radial outer surface and a piston ring seal retained in the shuttle and engaged with the first rotating component. Axial motion of the first rotating component relative to the second rotating component urges movement of the shuttle along the radial outer surface of the second rotating component, while the position of the piston ring seal remains stationary relative to the first rotating component.

Abstract: The shaft seal device includes a seal cover formed in a tubular shaped and provided on an outer periphery of a rotation shaft which is inserted into an axial hole of a housing, a flexible member that connects the seal cover to the housing, an auxiliary seal portion provided on an interior side of the shaft seal device in an axial direction of the seal cover, a magnetic fluid seal portion provided on an exterior side of the shaft seal device from the auxiliary seal portion in the axial direction of the seal cover, and bearings that support a load of the magnetic fluid seal portion.

Abstract: Flow restricting arrangements and rotor assemblies are provided. A flow restricting arrangement includes a stationary component and a rotating component. The rotating component is radially spaced apart from the stationary component such that a clearance is defined between the stationary component and the rotating component. A first magnet is embedded within the stationary component. A second magnet embedded within the rotating component. A plurality of magnetically responsive particles is contained within the clearance by a magnetic field produced by the first magnet and the second magnet. The plurality of magnetically responsive particles at least partially span the clearance.

Abstract: A seal arrangement for sealing a gap between a machine element comprising a shaft and a housing includes: at least one sealing element formed, at least partially, from polymeric material. The at least one sealing element is of annular design and is made of PTFE. The at least one sealing element has at least one first annular element and at least one second annular element. The at least one first element is electrically conductive and the at least one second element is electrically insulating. The at least one first element is arranged axially adjacently to the at least one second element. The at least one sealing element is provided with electrically conductive contact elements. The housing has an installation space forming an annular groove for the at least one sealing element. The installation space is provided with a lining forming an insulation.

Abstract: The present disclosure discloses a magnetic liquid sealing device adapted to axial and radial displacements of connection, which includes: an end cover; a rubber-sealing-ring equipped first clamping plate fixed on the end cover by a first screw and a second screw; a rubber-sealing-ring equipped second clamping plate installed in a groove of the end cover; a fundamental sealing structure fixed on the rubber-sealing-ring equipped second clamping plate by a third screw and a fourth screw, so as to be isolated from the end cover by the rubber-sealing-ring equipped first clamping plate and the rubber-sealing-ring equipped second clamping plate. The device isolates the connected component from the magnetic liquid sealing structure by the two clamping plates, such that the axial and radial deformations and displacements of the connected component will not be loaded on parts in magnetic liquid sealing structure, prolonging the service life of the magnetic liquid sealing.

Abstract: A sealing arrangement includes a first aft frame and a second aft frame neighboring one another. The first aft frame and the second aft frame each include an inner portion and an outer portion. The outer portion radially separated from the inner portion. The first aft frame and the second aft frame further include a first side portion and a second side portion that each extend radially between the inner portion and the outer portion. A circumferential gap is defined between the first side portion of the first aft frame and the second side portion of the second aft frame. The sealing arrangement further includes a side seal that extends across the circumferential gap. The side seal includes one or more magnets. The side seal is at least partially held in place by the one or more magnets.

Abstract: Sealing arrangements and turbomachines are provided. A sealing arrangement 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 is spaced apart from the aft frame and defines a gap therebetween. A sealing assembly extends across the gap and is magnetically coupled to both the aft frame and the stage one nozzle. The sealing assembly includes a first magnet coupled to the aft frame and a second magnet coupled to the stage one nozzle. The sealing assembly further includes a shell that is coupled to and at least partially surrounds the first magnet and the second magnet.

Abstract: A sealing arrangement for sealing a gap between a machine element and a housing includes: at least one sealing element; and an insulation which electrically insulates the at least one sealing element from the machine element and the housing. The at least one sealing element is at least partially electrically conductive.

Abstract: A magnetic fluid sealing device is disclosed. The magnetic fluid sealing device includes a housing, a shaft, and a magnetic sealing member. The housing has a cavity containing a magnetic fluid. One end of the shaft extends out of the housing through a first through-hole. The outer peripheral face of the shaft is provided with liquid injection grooves with one end extending out of the housing. The magnetic sealing member is located within the sealing cavity and includes at least one magnetic source and a plurality of pole shoes. The plurality of pole shoes are arranged at intervals in a length direction of the housing. The magnetic source is connected between two adjacent pole shoes. A sealing gap in communication with the liquid injection groove is defined between the plurality of pole shoes and the shaft.

Abstract: A magnetically-responsive device (100) having a magnetic seal (160,170) to retain magnetically responsive material within a defined space (150) is provided. The magnetically-responsive device (100) has a shaft (110), a rotor (130), a magnetic field generator (145), a magnetically-responsive medium and a magnetic seal (160,170). The seal (160,170) is preferably a non-contact seal (160,170) that does not deteriorate over time and generates little to no resistance.

Abstract: An arc-shaped stepped magnetic fluid sealing device comprises a casing, a sealing assembly and an end cover. The sealing assembly comprises a shaft, a permanent magnet, a first pole shoe and a second pole shoe. Inner walls of the first pole shoe and the second pole shoe are both arc-shaped faces inclined towards the side where the permanent magnet is located. A sealed cavity with a larger middle and two smaller ends is enclosed by the inner wall of the first pole shoe, an inner wall of the permanent magnet, and the inner wall of the second pole shoe. A portion of the shaft that is located inside the sealed cavity matches the sealed cavity in shape. Inner walls of the first pole shoe and the second pole shoe are respectively provided with first pole teeth and second pole teeth.

Abstract: Various embodiments of the present application provide one or more of: (1) auxiliary wheel that (a) enables accurate speed detection of a turbine disc and/or (b) presents a machining surface for balance correction; and/or (2) techniques for mounting an auxiliary wheel to a rotor, such as a turbine disc.

Abstract: A vibration energy harvester includes a proof mass that is a magnetic array or a coil array. The magnetic array has multiple magnets. The coil array has one or more coils. The vibration energy harvester includes an enclosed chamber. The enclosed chamber has the other of the coil array or the magnetic array that is not the proof mass. The one or more copper coils and the multiple magnets are configured to generate the electrical energy from a relative movement between the one or more copper coils and the multiple magnets. The vibration energy harvester includes a liquid suspension that suspends the proof mass within the enclosed chamber.

Abstract: A rotor structure for a conical air gap electrodynamic machine has one or more rotor assemblies arranged on an axis of rotation. Each of the one or more rotor assemblies includes magnetically permeable structures positioned radially about the axis of rotation. The magnetically permeable structures include first surfaces confronting the conical air gap that are oriented at an angle to the axis of rotation and second adjacent surfaces that are at an angle to the axis of rotation. The second adjacent surfaces are disposed radially closer to the axis of rotation than the first surfaces. One or more groups of magnetic structures include magnetic material. The one or more groups of magnetic structures include a first group of magnetic structures interleaved with the magnetically permeable structures, a second group of magnetic structures, and a flux conductor shield disposed adjacent to the second group of magnetic structures.

Abstract: Provided is a magnetic fluid sealed bearing having a stable sealing performance in a gap. The magnetic fluid sealed bearing includes: an inner ring and an outer ring; a plurality of rolling elements disposed between the inner and outer rings; a ring-shaped polar plate mounted on an inner circumferential surface of the outer ring such that a gap is formed between the ring-shaped polar plate and an outer circumferential surface of the inner ring; a ring-shaped magnet attached to the ring-shaped polar plate and magnetized such that magnetic poles thereof point to axial directions, to form magnetic circuits on both an outer ring side and an inner ring side; an inner ring magnetic fluid retained in the magnetic circuit on the inner ring side; and a magnetic field intensity increasing portion for increasing magnetic field intensity of the magnetic circuit on the inner ring side.

Abstract: A straight-line flexible positioning device is presented. The positioning device includes an X-shaft positioning portion, a Y-shaft positioning portion and a Z-shaft positioning portion, wherein the X/Y-shaft positioning portion includes an/a X/Y-shaft pedestal, an/a X/Y-shaft sliding rail, an/a X/Y-shaft sliding table and an/a X/Y-shaft power unit, the Z-shaft positioning portion includes a stand column, a Z-shaft screw shaft, a Z-shaft screw nut and a Z-shaft servo motor, the Z-shaft screw shaft is vertically arranged perpendicular to the X-shaft sliding rail and the Y-shaft sliding rail, the Z-shaft screw nut is fixedly connected with a spline shaft sheathed outside the Z-shaft screw shaft, the top portion of an inner guiding chamber on the stand column is provided with a spline nut, and the top end of the spline shaft extends out of the inner guiding chamber and an installation panel is arranged above the stand column.

Abstract: A rolling bearing has an inner ring attached to a rotating shaft out of contact with a first end surface, and an outer ring is fitted onto an inner peripheral surface of a housing in contact with the first end surface. A sliding element is provided between a second end surface and the first end surface. A retaining portion is provided between the sliding element and the first end surface. A biasing portion is provided between the retaining portion and the first end surface to bias the retaining portion toward a second side in a lamination direction. The rotating shaft, the housing, the inner ring, the outer ring, a rolling element, the sliding element, the retaining portion, and the biasing portion are formed of a conductive material. The rotating shaft and the housing are electrically connected by the sliding element, the retaining portion, and the biasing portion.

Abstract: A filter device (100) includes an annular filter (110) provided on a shaft (10) and a rotary seal (120) for sealing an annular gap between the filter (110) and a housing (20). The rotary seal (120) includes an annular magnet (140) provided on the filter (110) and a flexible annular sealing member (130) provided on the housing (20). The sealing member (130) is provided on an upstream side of the magnet (140) and includes an annular opposing portion (132) that opposes the magnet (140) in an axial direction, and a magnetic fluid (150) soaked into the opposing portion (132). The opposing portion (132) makes contact with the magnet (140).

Abstract: A magnetic fluid sealing structure (1) for high-speed rotation for sealing a gap (S) between a shaft member (2) and a housing member (3) disposed around the shaft member (2), which are rotatable, includes: magnetic force generating means (4) which is fixed to the housing member (3) and generates a magnetic force; magnetic pole members (5) disposed on both sides in an axial direction of the magnetic force generating means (4); and a magnetic fluid (7) which is magnetically held between the magnetic pole members (5) and the shaft member (2) by the magnetic force of the magnetic force generating means (4) and seals the gap (S) therebetween, in which the shaft member (2) has a plurality of different material layers concentrically laminated in a radial direction, and an outermost diameter layer (23) of the shaft member (2), which holds the magnetic fluid (7), is made of a magnetic material.

Abstract: An object of the present invention is to provide a fishing reel wherein a bearing rotatably supporting a drive shaft securely shuts out water from its interior so as to maintain stable sealing and thus smooth rotation for a long period wherein such a bearing can be readily built in. In accordance with one aspect, the fishing reel of the present invention includes a drive shaft to be rotationally driven for winding a fishing line around a spool. The drive shaft is rotationally supported by a magnetic fluid sealed bearing having an inner ring magnetic fluid retained between an inner ring and a polar plate retaining a magnet and/or between the inner ring and the magnet, and an outer ring magnetic fluid retained between an outer ring and the polar plate retaining the magnet and/or between the outer ring and the magnet.

Abstract: The present invention provides a magnetic fluid sealed bearing having a stable sealing performance and allowing easy build-in of a magnetic sealing mechanism into the bearing. A magnetic fluid sealed bearing according to the present invention includes: an inner ring and an outer ring; a plurality of rolling members disposed between the inner ring and the outer ring; a ring-shaped polar plate mounted on an inner circumferential surface of the outer ring such that a gap is produced between the ring-shaped polar plate and an outer circumferential surface of the inner ring; a ring-shaped magnet attached to an axially inner side surface of the ring-shaped polar plate, the ring-shaped magnet forming magnetic circuits on both the outer ring side and the inner ring side; and an inner ring magnetic fluid retained in the magnetic circuit on the inner ring side for sealing the gap.

Abstract: Provided is a magnetic fluid sealed bearing with which torque can be reduced without impairing a water and dust proof effect. A magnetic fluid sealed bearing according to the present disclosure includes a magnetic fluid retained by a ring-shaped magnet in an opening between an inner ring and an outer ring to seal a plurality of rolling members. The magnet is magnetized such that their magnetic poles point to an axial direction. The bearing further includes a ring-shaped outer polar plate and a ring-shaped inner polar plate sandwiching the ring-shaped magnet therebetween, one side of the polar plates being fixed to one of the inner ring and the outer ring, and the other side of the polar plates facing a clearance.

Abstract: A sealing arrangement for a pump shaft, includes a restrictor section (18) arranged along the shaft (16) and separating a high-pressure chamber (12) of the pump from a sealing chamber (20), a seal (22) arranged on the shaft (16) and between the sealing chamber (20) and a low-pressure chamber (30), a restrictor leakage line (34) leading from the sealing chamber (20) to the exterior, and a seal leakage line (42) leading from the low-pressure chamber (30) to the exterior, wherein a section of the seal leakage line (42) runs through the interior of the restrictor leakage line (34).

Abstract: An even number of magnets (5) are incorporated in a housing (3) while sandwiched by pole pieces (6). A rotating shaft (2) has a boundary which is provided in a hollow portion (3a) of the housing (3) and nearer to an airtight chamber (1) than a pole piece (6) nearest to the airtight chamber (1), and an area of the rotating shaft (2) which is nearer to the airtight chamber (1) than the boundary is formed of a non-magnetic material. In the housing (3), an area located near the airtight chamber (1) from a site which is in contact with a pole piece (6) nearest to the airtight chamber (1) is formed of a magnetic material.

Abstract: Provided is a bearing with a magnetic fluid seal reliably maintaining sealing of a rolling element section in the bearing and having a structure ensuring high productivity. In a bearing with a magnetic fluid seal according to the present invention, a plurality of rolling elements 7 are disposed between an inner ring and an outer ring, and a ring-shaped magnet is arranged at an opening side of the inner and outer rings so as to retain magnetic fluid, so that the plurality of rolling elements are sealed. The magnet is magnetized so that magnetic poles are oriented in an axial direction. A ring-shaped pole plate is arranged to be in contact with an outer side surface of the magnet in the axial direction. Outer-ring-side magnetic fluid is retained between the outer ring and the magnet, and inner-ring-side magnetic fluid is retained between the inner ring and the pole plate.

Abstract: In a bearing according to an embodiment, a pair of magnets is arranged such that sides of the magnets opposed to each other with rolling members interposed therebetween have different magnetic polarities from each other. A magnetic fluid sealed bearing according to another embodiment includes a non-magnetic spacer disposed between a magnet of one of magnetic fluid seals and a magnet of the other of the magnetic fluid seals so as to form a magnetic circuit that penetrates outer and inner rings and goes around the rolling members.

Abstract: A segment of a structure mitigates flow of fluid therethrough. In one embodiment the segment includes an opening for the fluid flow and the modified structure may include a ferromagnetic wall defining the opening and a plurality of permanently magnetized particles. Some of the permanently magnetized particles are attached to the wall by magnetic forces. A system is also provided for injecting magnetic particles into a cavity to impede movement of fluid through the cavity. A method is also described for mitigating a flow of fluid through an opening in a wall. In one embodiment, the method includes positioning a plurality of first magnetic particles along the wall and about the opening and attaching a plurality of second magnetic particles to the first magnetic particles wherein some of the second magnetic particles collectively extend across the opening to cover the opening.

Abstract: Provided is a bearing with a magnetic fluid seal reliably maintaining sealing of a rolling element section in the bearing and having a structure ensuring high productivity. In a bearing with a magnetic fluid seal according to the present invention, a plurality of rolling elements 7 are disposed between an inner ring and an outer ring, and a ring-shaped magnet is arranged at an opening side of the inner and outer rings so as to retain magnetic fluid, so that the plurality of rolling elements are sealed. The magnet is magnetized so that magnetic poles are oriented in an axial direction. A ring-shaped pole plate is arranged to be in contact with an outer side surface of the magnet in the axial direction. Outer-ring-side magnetic fluid is retained between the outer ring and the magnet, and inner-ring-side magnetic fluid is retained between the inner ring and the pole plate.

Abstract: A ball bearing (rolling bearing) containing lubricant sealed therein is provided between a shaft and a sleeve. A labyrinth seal (seal gap) is provided at an end portion of the shaft or the sleeve in the axial direction. A permanent magnet is disposed such that a magnetic pole is located in proximity to the labyrinth seal. A magnetic seal effect that utilizes diamagnetism acting on evaporating oil is provided at the labyrinth seal.

Abstract: A rolling bearing assembly with electrical discharge damage protection is provided. The rolling bearing assembly includes radially inner and outer bearing rings that each have a race. A roller assembly including a plurality of rolling elements that are supported to roll on the races is provided. A shield extends radially between the radially outer ring and the radially inner ring. The shield includes a body portion with one radial end that is fixed to one of the radially inner or outer rings, at least one electrically conductive seal on a surface of the body portion, and a plurality of filaments extending on an opposite radial end of the body portion from the fixed radial end that contacts the other of the radially inner or outer rings.

Abstract: A segment of a structure mitigates flow of fluid therethrough. In one embodiment the segment includes an opening for the fluid flow and the modified structure may include a ferromagnetic wall defining the opening and a plurality of permanently magnetized particles. Some of the permanently magnetized particles are attached to the wall by magnetic forces. A system is also provided for injecting magnetic particles into a cavity to impede movement of fluid through the cavity. A method is also described for mitigating a flow of fluid through an opening in a wall. In one embodiment, the method includes positioning a plurality of first magnetic particles along the wall and about the opening and attaching a plurality of second magnetic particles to the first magnetic particles wherein some of the second magnetic particles collectively extend across the opening to cover the opening.

Abstract: An electrostatic discharge apparatus for use with a hub and spindle assembly for a disc drive storage system comprising a spindle; a hub rotatably mounted on the spindle; a capsule formed at least in part from an electrically conductive material that can be placed in electrical communication with the hub and defining a chamber configured to hold an electrically conductive fluid and defining at least one capillary channel in fluid communication with an opening formed in the capsule, the opening configured to permit rotation about the spindle, and to permit a meniscus formed by the conductive fluid proximate to the opening to electrically contact the spindle during rotation of the hub about the spindle.

Abstract: A magnetic fluid seal (20) sealing between an apparatus end (14) and a rotating shaft (22) going through the apparatus end, comprising a housing (38) comprising a magnetic flux generating means (28) generating a magnetic flux and a magnetic flux transfer means (24, 26) facing to the rotating shaft with a fine clearance and transferring the magnetic flux, and placed so as to move relatively in a radial direction of the rotating shaft with respect to the apparatus end and a magnetic fluid (44) held in the fine clearance by the magnetic flux generated by the magnetic flux generating means.

Abstract: Provided with a sealed rotational output unit (3) which includes a tubular shaft (12) having an outer circumferential surface sealed with a ferrofluidic seal (13); a rotating output shaft (14) disposed inside the tubular shaft (12); and an O-ring (17, 18) that seals between the tubular shaft (12) and the rotating output shaft (14). When the rotating output shaft (14) is directly coupled to a hollow motor shaft (9), shaking thereof is absorbed by the O-ring (17, 18), causing no excessive stress to be produced on the bearing side of the hollow motor shaft (9) or on a bearing (15, 16) side of the ferrofluidic seal (13). Since the tubular shaft (12) rotates in conjunction with the rotating output shaft (14), the O-ring (17, 18) that seals therebetween does not degrade in sealing capability due to wear by sliding. The sealed rotational output unit can be used with high rotational accuracy by directly coupling to a hollow motor (2) without any joint.

Abstract: A magneto-fluidic seal includes a shaft, a pole piece, and a plurality of sealing fluid rings located between the shaft and the pole piece. The sealing fluid rings may be defined by the shaft and/or the pole piece and contain a ferromagnetic fluid. At least one channel having a bottom is defined by either the shaft or the pole piece. A shunt is located directly adjacent to the bottom of the channel. The thickness of the shunt is based on the energy differential in the plurality of sealing fluid rings as the fluid is displaced from one side of the sealing fluid rings to the other side of the sealing fluid rings.

Abstract: A cartridge-type magnetic fluid seal device has a flanged sleeve fixed to an external peripheral surface of the radially inside member of two members and which rotates together with the inside member is provided facing a pair of magnetic pole members. A packing is disposed in an annular space formed by the radial inside of a magnetic source and the pair of magnetic pole members. The packing is provided in the annular space so as to slide on an external peripheral surface of the flanged sleeve, and a magnetic fluid seal part, the packing, and the flanged sleeve form a unit.

Abstract: A magnetic fluid seal is provided, that is capable of producing a stable sealing performance by stably holding the magnetic fluid in place, even in cases when the two members become eccentric. The magnetic fluid seal includes: an annular magnetic circuit forming member 100 that is disposed on a housing 600; an annular member 200 that is disposed on a shaft 500; and a magnetic fluid 300 that is magnetically held between axially opposing surfaces of the magnetic circuit forming member 100 and the annular member 200. In addition, the annular member 200 comprises a flexible member that is swayable so that a portion of the annular member 200 that opposes the magnetic circuit forming member 100 follows the magnetic circuit forming member 100.

Abstract: A magnetic fluid seal includes a pole ring having an inner diameter, a rotatable shaft having an outer diameter, the rotatable shaft configured to extend along the inner diameter of the pole ring between an atmosphere side and vacuum side, at least one magnet coupled to the pole ring, the at least one magnet configured to emit a magnetic field having a strength and a shape, and grooves formed on either the inner diameter of the pole ring or the outer diameter of the shaft, the grooves capable of containing ferromagnetic fluid. The ferromagnetic fluid contained the grooves varies so as to improve the performance of the magnetic fluid seal.

Abstract: A magnetic fluid shaft-sealing device includes an outer ring for receiving a rotary shaft. A magnetic-field generating unit is mounted in an annular seal chamber of the outer ring for receiving the rotary shaft. A seal ring is mounted in the seal chamber of the outer ring and located between a magnet of the magnetic-field generating unit and an end of the outer ring. The seal ring includes inner and outer peripheries spaced in a radial direction. A lip extends from the inner periphery of the seal ring toward or away from the end of the outer ring and is at a non-parallel angle to the radial direction of the seal ring to form a seal around the rotary shaft.

Abstract: A shaft-sealing device includes an outer ring for receiving a shaft sleeve to rotate therewith. A magnetic-field generating unit is mounted the around rotary shaft and includes inner and outer magnetic rings. The outer magnetic ring is mounted in the outer ring. A gap is defined between an inner periphery of the outer magnetic ring and an outer periphery of the inner magnetic ring and is filled with a magnetic liquid. One or both of the inner and outer magnetic rings provide magnetic force to retain the magnetic liquid in the gap. A seal ring is mounted between the outer magnetic ring and an end of the outer ring. A lip extends from an inner periphery of the seal ring toward or away from the end of the outer ring and is at a non-parallel angle to a radial direction of the seal ring to form a seal around the rotary shaft.

Abstract: A seal device has a magnetic force generator for generating a magnetic force in a vicinity of a shaft. A first magnetism transmission member for transmitting the magnetic force generator is disposed adjacent to one side of the magnetic force generator. A second magnetism transmission member for transmitting the magnetic force generated by the magnetic force generator is disposed adjacent to another side of the magnetic force generator. A slide bush is disposed and secured between an inner flange of the second magnetism transmission member and the shaft. A seal member for sliding relative to an outer peripheral surface of the shaft, is accommodated in a sealing. And, a magnetic fluid is held between the shaft and the magnetism transmission member by the magnetic force generated by the magnetic force generator.

Abstract: This invention proposes a new way of sealing the working chambers in Wankel-type rotary engines, by using ferrofluids and magnets in place of typical metal seals. The use of ferrofluids will allow for not only a better seal, but one that is easier to maintain.

Abstract: Methods and systems for reducing a flow of ambient air into a bearing lubricating oil system are provided. The system includes a lubricating oil bearing cover that is stationary with respect to the bearing wherein the bearing is configured to support a portion of a rotatable machine shaft. The cover includes a first end cap extending radially inwardly towards the shaft such that a cavity surrounding the bearing is formed by the cover and the first end cap and a set of seal rings positioned substantially concentric with the shaft and forming a seal against lubricating oil flow. The seal rings include a plurality of wire bristles extending radially inwardly from the end cap wherein the wire bristles are configured to extend to a surface of the shaft when assembled and the bristles are configured to present a tortuous flow path to gas infiltrating the cavity.

Abstract: A disk device with disk contamination control having a spindle for rotating at least one disk. A spindle hub located on the spindle. A disk clamp for clamping the at least one disk on the hub. A magnetic clamp seal magnetically and removably attached to the disk clamp wherein the magnetic clamp seal encapsulates disk contaminants between the clamp and the clamp seal. The magnetic clamp seal magnetically collects metallic contaminants within a sealed housing.

Abstract: First portions are fixed to an outer ring, and second portions are fixed to an inner ring. Bimetal members and electromagnets are embedded in and fixed by elastic portions of the first portions and portions of the second portions are constituted by ferromagnetic members. Whereas at a normal temperature region, the first portions and the second portions are brought into contact with each other, based on deformations of the bimetal members at a temperature equal to or higher than a predetermined temperature equal to or higher than the normal temperature region, the first portions and the second portions are made to be disposed to be spaced apart from each other by intervals therebetween at a temperature equal to or higher than the predetermined temperature equal to or higher than the normal temperature region.

Abstract: A failure indicator seal includes a nonmagnetic housing, a plurality of annular pole pieces having distal ends, the plurality of annular pole pieces disposed within the nonmagnetic housing, an annular, non-conducting magnet disposed between the pole pieces, a predefined quantity of magnetic fluid disposed between each of the distal ends of the plurality of annular pole pieces and the rotary shaft of a rotary feedthrough forming a plurality of magnetic fluid O-ring seals, and means for measuring resistance through the plurality of annular pole pieces, the plurality of magnetic fluid O-ring seals and the rotary shaft.

Abstract: A magnetic fluid shaft-sealing device includes an outer ring for receiving a rotary shaft to rotate therewith. A magnetic-field generating unit is mounted in an annular seal chamber of the outer ring for receiving the rotary shaft. A seal ring is mounted in the seal chamber of the outer ring and located between a magnet of the magnetic-field generating unit and an end of the outer ring. The seal ring includes inner and outer peripheries spaced in a radial direction. A lip extends from the inner periphery of the seal ring toward or away from the end of the outer ring and is at a non-parallel angle to the radial direction of the seal ring to form a seal around the rotary shaft.

Abstract: A magnetic fluid shaft-sealing device includes a seal cover (3) attached to a pump housing (1) in which a rotary shaft (2) is mounted. The seal cover (3) includes: a shaft hole (33) extending along an axis, an annular recess (36) formed in an outer end face (32) around the shaft hole (33), and an inner ring portion (363) defined between the annular recess (36) and the shaft hole (33). A collar (4) is mounted around the rotary shaft (2) to rotate therewith and includes a first end (41) received in the annular recess (36) and around the inner ring portion (363). A magnet (6) and two pole pieces (5) are mounted between an outer periphery (364) of the inner ring portion (363) and the first end (41) of the collar (4). A gap (71) is formed between an inner periphery (440) of the first end (41) of the collar (4) and outer peripheries of the pole pieces (5), and a magnetic liquid (7) is filled in the gap (71) to provide a liquid seal therebetween.

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 ferrofluid sealing apparatus for a reciprocating shaft, in which the first bearing, the first magnetism isolating rings, the first pole piece, the first O-shaped rubber seal, a magnet, the second O-shaped rubber seal, the second pole piece, the second magnetism isolating ring, and the second bearing are sandwiched between the two inner bosses of the outer casing in series, an end cover is fixed on the outer casing by means of screws so that the second bearing is pressed, there are provided with three step holes in the inner torus of the second (13) pole piece as the left step hole, the middle step hole, and the right step hole, in which N+1 of elastic rings (T) and trapezoidal teeth (C) are arranged closely with interval of the middle step hole, where N is a positive integer in 1 to 8, the teeth and rings are connected with the second pole piece by means of screws and shield rings (15), the N of trapezoidal teeth (C) are arranged with the same expanding direction of their inner holes, the first pole piece h