Abstract: A sealing device includes an annular reinforcing ring and an elastic body part, and the elastic body part has an annular seal lip, an annular dust lip, and an annular side lip. The side lip extends toward the outer side on an outer periphery side of the dust lip, and includes a distal end portion, a middle portion, and a root portion. The root portion is an annular portion, the middle portion is a portion that is outside of the root portion, and an annular portion that increases in diameter toward an outward side, and the distal end portion is a portion that is outside the middle portion, and an annular portion that increases in diameter toward an outward side. The distal end portion is bent to an inner periphery side from the middle portion.

Abstract: Shaft seal for sealing a shaft against a housing of a motor vehicle, comprising a shaft sealing ring having a sealing lip for sealing the shaft against the housing, characterised in that a labyrinth seal is arranged upstream of the shaft sealing ring on the oil side thereof.

Abstract: A pump assembly, fluid machinery, and a heat exchange device. The pump assembly includes: a lower flange; a lower friction-reducing ring; a cylinder, the lower friction-reducing ring being disposed inside the cylinder, and the lower flange being disposed below the cylinder; and a piston assembly arranged inside the cylinder and includes a piston sleeve and a piston slidably arranged inside the piston sleeve. The lower friction-reducing ring has a central hole. A position-limiting protrusion is disposed on a surface of the piston sleeve, which faces the lower flange. The limiting protrusion extends into the central hole of the lower friction-reducing ring, fits and is limited by the lower flange.

Abstract: A gas turbine engine includes a shaft compartment containing at least one main shaft which rotates about a main axis of rotation; and a tower shaft engaged with the at least one main shaft for rotation about a tower shaft axis of rotation, the tower shaft being mounted in a bearing compartment extending away from the shaft compartment, wherein the bearing compartment is sealed against leakage from inside the bearing compartment to ambient. The seal can be produced using a tower shaft seal held in a seal housing and sealing against one or more faces of the tower shaft assembly or components.

Abstract: A side lip has an intermediate thick portion. An inner circumferential side surface of the side lip has a side surface shape of a cone. An outer circumferential side surface of the side lip includes a first outer circumferential portion having a side surface shape of a cone in which the thickness gradually increases from a small diameter side toward a large diameter side, and a second outer circumferential portion having a side surface shape of a cone or a column in which the thickness gradually decreases. A thickness T1 of a distal end portion of the side lip is 0.5 T to 0.7 T, and a thickness T2 of the intermediate thick portion is 1.2 T to 1.5 T, relative to a thickness T of a base end portion of the side lip. An angle A of the distal end portion of the side lip is 10° to 30°.

Abstract: Assemblies are provided for rotational equipment. One of these assemblies includes a first bladed rotor assembly, a second bladed rotor assembly, a stator vane assembly, a stator structure and a seal assembly. The second bladed rotor assembly includes a rotor disk structure. The stator vane assembly is axially between the first and the second bladed rotor assemblies. The stator structure is mated with and radially within the stator vane assembly. The seal assembly is configured for sealing a gap between the stator structure and the rotor disk structure, wherein the seal assembly includes a non-contact seal.

Abstract: A gear-driven bearing unit comprising a housing, a drive gear and a rolling element bearing The rolling element bearing comprising: an outer member with teeth for meshing with drive gear teeth, an inner member and rolling elements between the inner and outer members. At one axial side, the housing is connected to the inner member enclosing the outer member. A first radial gap extends between an outer member radially inner surface and an inner member radially outer surface. A second radial gap exists between an outer member radially outer surface and a housing radially inner surface. The radial gaps are sealed by seals, each comprising radial sealing lips. The unit is lubricated with a grease comprising a calcium-based thickener or calcium salt additives and the teeth on the outer member are made of a hardening treated bearing-grade steel which diffuses nitrogen into the surface of the teeth.

Abstract: To suppress static leakage in a seal device, a seal lip is configured for sliding contact with a seal flange that includes a thread groove exerting a fluid pumping action at a time of shaft rotation. The seal device prevents sealing fluid on the inner-machine side from leaking to the outer-machine side between a housing and a rotating shaft inserted into a shaft hole on the housing. The seal lip is attached to the inner periphery of the shaft hole and the seal flange is attached to the outer periphery of the rotating shaft. A sliding area in the seal flange in sliding contact with the seal lip is a flat surface with no thread grooves, and has an outer peripheral side area and an inner peripheral side area, which each have a thread groove exerting a fluid pumping action when the rotating shaft rotates.

Abstract: A seal system for a rotor assembly of a surface treatment machine includes a rotatable rotor assembly shell including surface treatment tools extending therefrom, and a stub-shaft located within the shell and fixedly coupled to the shell. The stub-shaft includes a shaft portion and a base portion, with the base portion including a recess. A non-rotatable bearing housing surrounds at least a portion of the shaft portion and has an longitudinally extending inner end located within the recess. A seal member is located in the recess and secured between the bearing housing and the base portion.

Abstract: A rotary machine, including: a rotor (2) extending in an axial direction, the rotor including a first thrust collar (35) and a second thrust collar (36) projecting radially outward; a first thrust bearing device (31) configured to receive load acting in the axial direction via the first thrust collar (35); a second thrust bearing device (32) configured to receive load acting in the axial direction via the second thrust collar (36); and a load control device (16) configured to control load acting on at least one of the first thrust bearing device (31) and the second thrust bearing device (32).

Abstract: In an embodiments, in a sealing face of at least one slide part of a pair of slide parts, a dynamic pressure generation groove 10 is provided so as to be separated not to communicate with a sealed fluid side and a leakage side by land portions on both sealing faces, between an end 10a on the leakage side of the dynamic pressure generation groove 10 and the leakage side, a fluid introduction groove 11 which communicates the dynamic pressure generation groove 10 and the leakage side is provided, and the cross-sectional area of the fluid introduction groove 11 is set smaller than the cross-sectional area of the dynamic pressure generation groove 10. The sealing faces are subjected to fluid lubrication and low friction in a steady operation, and leakage of the sealed fluid and entrance of dust into the sealing faces are suppressed.

Abstract: A rotary machine for conveying a fluid includes a drive unit configured to drive a shaft, an impeller arranged at the shaft, and configured to convey the fluid, at least one mechanical seal configured to seal the shaft, a first and a second heat exchange system configured to cool or heat the mechanical seal, the first heat exchange system configured for direct application of a fluid heat carrier at the mechanical seal and the second heat exchange system comprising a heat exchange jacket capable of having a fluid heat carrier flow therethrough without direct contact with the mechanical seal, the first and the second heat exchange systems forming a common heat exchange system in which a common fluid heat carrier is capable of being circulated, and a fan wheel configured to circulate the common fluid heat carrier in the common heat exchange system.

Abstract: Systems and methods for thermal seals are described herein. A thermal seal may comprise a first metallic plate having a first inner surface and a first outer surface, a second metallic plate having a second inner surface and a second outer surface, the second metallic plate being oriented substantially parallel to the first metallic plate such that the first inner surface and the second inner surface are separated by a gap, and a thermal wool having a plate portion in contact with the first inner surface and the second inner surface, the plate portion filling a void between the first inner surface and the second inner surface, and having a shoulder portion extending from a perimeter of the plate portion, the shoulder portion extending outward from between the first metallic plate and the second metallic plate.

Abstract: Oil slinger systems include a seal runner comprising an annular radial member having a radius (R) and an outer axially extending member having an axial length (L) such that a ratio (L/R) is between 0.8 and 1.4, the annular radial member disposed at a first angle with respect to the outer axially extending member, a heat shield in mechanical communication with the seal runner, and a volume bounded by an outer face of the annular radial member and an inner face of the heat shield. Methods of radial convective cooling include pumping a cooling liquid through the oil slinger system and convectively cooling the oil slinger.

Abstract: A method and an ejection device are provided for discharging contaminants out of a seal chamber of a rotating-fluid machine driving a main flow of contaminated fluid. The ejection device incorporates an obstacle for arresting a portion of the flow in the seal chamber to stagnation pressure, whereby a zone of fluid at stagnation pressure is created. A discharge passage is disposed in the seal chamber adjacent to a region of concentration of contaminants and in the zone of stagnation pressure created by the obstacle, whereby contaminants are pumped out via the discharge passage into the main driven flow. The discharge passage is disposed upstream of the obstacle and provides fluid communication between the seal chamber and a process side of the machine. The method and the ejection device are operative with a machine driving fluid in clockwise direction, in counterclockwise direction, and in both clockwise and counterclockwise direction.

Abstract: An electrical submersible pump assembly includes a production pump, a motor containing a motor lubricant, and a seal section coupled between the motor and the pump. A drive shaft extends through the seal section, the drive shaft being rotated by the motor for driving the production pump. A mechanical face seal in the seal section seals around the shaft. A circulation pump is mounted to the shaft above the face seal for rotation therewith. An inlet passage leads from an exterior of the seal section to the circulation pump to deliver well fluid to the circulation pump. An outlet passage leads from the circulation pump to the exterior of the seal section to discharge well fluid exterior of the seal section. The rotating component of the face seal is located in the outlet passage.

Abstract: A dry running mechanical seal is able to form a direct contact seal for extended periods at both low and high rotational speeds without undue heating or wear of the seal faces. A rear surface of the stator face and corresponding surface of a mounting plate are both lapped for maximum direct contact transfer of heat. Air from a region surrounding the shaft is circulated through a cooling annulus directly behind the stator face and out through exit ports. In embodiments, enlarged scallops or other features on the rotor seal face enhance air turbulence near the seal faces. In various embodiments a surface supporting a dynamic gasket is polished smooth, thereby reducing gasket drag, minimizing the required pressing force between the seal faces, and reducing frictional heating. In embodiments, the rotor seal face shape is optimized to minimize pressure distortions at high pressure.

Abstract: The invention relates to a turbine engine comprising an air compression stage comprising at least one movable compressor wheel, an air inlet duct coupled to said air compression stage, a first sealing device, which is arranged between a front portion of the movable compressor wheel and the air inlet duct and comprising at least one seal, a channel for conveying the air compressed by the movable wheel and a second sealing device, which is arranged between a rear portion of the movable compressor wheel and the conveying channel and is configured to receive an airflow coming from the conveying channel, the turbine engine being remarkable in that the second sealing device is configured to allow some of the air passing therethrough to be bled and in that the bleed air is conveyed to the seal of the first sealing device so as to keep it under pressure.

Abstract: A rolling bearing includes an inner ring, an outer ring, a plurality of rolling elements, and a cage. A first seal is provided on one side of the annular space between the inner ring and the outer ring in the axial direction and has a first lip portion that forms a first labyrinth clearance with the inner ring to prevent spill of the grease. A second seal is provided on the other side of the annular space in the axial direction and has a second lip portion that forms a second labyrinth clearance with the inner ring to prevent spill of the grease. The second lip portion is larger than the first lip portion such that the path length of the second labyrinth clearance is longer than the path length of the first labyrinth clearance.

Abstract: A seal assembly is disclosed that can be used to seal a bearing case in a turbine. The seal assembly has an annular seal plate seated within a groove defined in the bearing case and radially-offset from the turbine shaft. A seal retainer is mounted on the shaft axially-offset from the annular seal plate and defines a channel therein for receiving and seating a seal therein. The seal has a flexible lip that extends from the body of the seal and engages either the inside surface of the bearing case or a counterface of the annular seal plate, thereby preventing or substantially restricting the influx of contaminants into the bearing case.

Abstract: A magnetic seal device that includes a magnetic sleeve having a cylindrical body that and fits on an outer peripheral surface of a rotatable shaft, a ring shaped magnet being arranged radially outwardly from an outer peripheral surface of the magnetic sleeve with a gap, and a magnetic circuit formed between the outer peripheral surface of the magnetic sleeve and the ring shaped magnet. A magnetic fluid is maintained at the gap. The magnetic sleeve includes a groove arranged circumferentially around the outer peripheral surface of the magnetic sleeve, and a flange extending radially outwardly from and circumferentially around the outer peripheral surface of the magnetic sleeve. The flange has a diameter that is larger than a diameter of the outer peripheral surface of the magnetic sleeve.

Abstract: Assemblies are provided for rotational equipment. One of these assemblies includes a first bladed rotor assembly, a second bladed rotor assembly, a stator vane assembly, a stator structure and a seal assembly. The second bladed rotor assembly includes a rotor disk structure. The stator vane assembly is axially between the first and the second bladed rotor assemblies. The stator structure is mated with and radially within the stator vane assembly. The seal assembly is configured for sealing a gap between the stator structure and the rotor disk structure, wherein the seal assembly includes a non-contact seal.

Abstract: The present invention describes a gas turbine having two shafts, which are rotatably mounted using bearing devices in the area of a casing. An intermediate shaft sealing device is arranged between the bearing devices, which includes a sealing element connected to a first shaft, in which a further sealing element connected to the second shaft radially engages. An operating pressure is applied, in the area limited by the shafts in the axial direction of the shafts, to facing effective areas of the sealing elements, while the pressure prevailing in the area outside the shafts in the axial direction acts on effective areas of the sealing elements facing away from one another. A ratio between the outer diameters limiting the facing effective areas and the inner diameters likewise limiting these effective areas is in each case greater than or equal to 1.25.

Abstract: Methods for making inhalable composite particles comprising a pharmaceutically-active agent, the method comprising: a) providing composite particles comprising a millable grinding matrix and a solid pharmaceutically-active agent, wherein the pharmaceutically-active agent has an median particle size on a volume average basis between 50 nm and 3 ?m; and b) milling the composite particles in a mill without milling bodies for a time period sufficient to produce inhalable composite particles having a mass median aerodynamic diameter between 1 ?m and 20 ?m are described.

Abstract: A method of coating an expandable item (10) such as a pressure vessel or process vessel used for instance in the off shore oil industry. A compressible flexible intermediate layer (14) is provided on the item (10), and a support member (18) is embedded in the intermediate layer (14). The support member (18) comprises an open framework base (20) and a plurality of projecting members upstanding therefrom and extending out of the intermediate layer (14) away from the item (10). A thermally insulating coating layer (12) is applied over the intermediate layer (14) such that the projecting members (22) extend into the coating layer (12), and are wholly located in the coating layer (12).

Abstract: A compressor rotor comprising a pinion shaft which has multiple interconnected segments that are arranged axially one behind the other and including a multipart seal which seals the pinion shaft is provided. The pinion shaft has a rotor segment which supports a rotor, a connection segment, and a toothed segment arranged axially between the rotor segment and the connection segment, the toothed segment having a toothing at each of the two ends of the toothed segment. The toothed segment is held axially between the rotor segment and the connection segment via toothings by means of corresponding mating toothings at ends of the rotor segment and the connection segment, and a multipart seal sealing element which is connected to the toothed segment in an at least force-fitting manner is arranged on said toothed segment.

Abstract: A rod seal assembly. The rod seal assembly includes a housing between two spaces configured to receive a reciprocating rod, the reciprocating rod disposed within a first space and a second space, a floating bushing configured to move axially and radially within the housing and disposed coaxially around the reciprocating rod, a rod seal configured to seal the outside diameter of the reciprocating rod relative to an inside surface of the floating bushing, and at least one stationary bushing fixed within the housing that may form a seal with the floating bushing to the axial flow of fluid in the presence of a pressure difference between the two spaces.

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: A bearing having an inner ring, an outer ring, and at least one seal arranged between the rings. The bearing including a protective cover that delimits an annular space into which the seal extends and provides an outer annular portion and at least one inner portion disposed radially facing and at a distance from one another, and a connecting annular portion linking the outer annular portion and the inner portion; and at least one means for fixing the protective cover onto the inner ring, the fixing means passing through the outer and inner portions of the protective cover and cooperating with the inner ring.

Abstract: In order to prevent working medium from accumulating in the compressor housing (2) of a piston compressor (1) in a simple manner by means of a sealing of the piston rod (7) in the form of sealing medium barrier supplied by a hydraulic unit (12), it is provided that a ventilator (32) and a sealing medium container (37), which is partially filled with sealing medium, are provided in the hydraulic unit (12), wherein the ventilator (32) suctions air from the free space of the sealing medium container (37), and the free space (45) in the sealing medium container (37) is connected via a line (15, 17) to the compressor housing (2), and an opening (16) is provided at the compressor housing (2) for connecting the interior of the compressor housing (2) to a purge gas reservoir (18).

Abstract: A device for sealing a high pressure region in a turbomachine from a low pressure region; the turbomachine has one or more statoric parts and one or more rotoric parts; the device comprises a labyrinth seal having a first plurality of grooves and a second plurality of grooves; the first plurality of grooves is disposed in a helical pattern and the second plurality of grooves is disposed in a cylindrical pattern; the labyrinth seal is disposed between at least one of the one or more rotoric parts of the turbomachine and at least one of the one or more statoric parts of the turbomachine between the high pressure region and the low pressure region of the turbomachine; the helical pattern has a helix angle less than or equal to 10°, wherein a stabilization effect of the turbomachine is obtained and leakage due to the second plurality of grooves is negligible.

Abstract: A fluid sealing device for rotating machines having a rotor part including at least one disk carried by a rotating shaft rotating in and relatively to a stator part in the presence of a fluid is disclosed. The rotating shaft has a sealing system defining a first environment at a first pressure. The stator part has a wall in front of the disk of the stator part defining a second environment therewith containing a fluid at a second pressure. The device includes a movable ring placed between the wall of the stator part and the disk of the rotor part and has a front sealing gasket facing towards the disk. The movable ring is moved in the active position when the rotating machine is stopped to prevent the fluid passage from one environment to the other.

Abstract: A tilling implement for use with a farm vehicle includes a frame, a tilling element attached to the frame, a bearing assembly configured to allow the tilling element to rotate relative to the frame. The bearing assembly can include a first race, a second race spaced apart from the first race to define a gap therebetween, a bearing rotatably disposed within the gap to allow relative movement between the first race and the second race, a seal including a flexible protrusion having a distal end that presses against the first race to seal off the gap, and a stop positioned adjacent to the flexible protrusion configured to prevent the distal end of the protrusion from bending towards the bearing.

Abstract: A disclosed intershaft seal assembly for a gas turbine engine includes a support fixed to a static structure. A first seal housing is supported radially outboard of the support for holding a first seal. A second seal housing is supported radially inboard of the support and supports a second seal. A first biasing member is provided between the support and the first seal housing that biases the first seal housing in a first direction away from the support. A second biasing member between the support and the second seal housing biases the second seal housing in a second direction away from the support.

Abstract: An induced draught fan, including: a motor, the motor including a shaft; a volute; and a wind wheel. The volute is provided with an air intake and an air outlet. The wind wheel is arranged inside the volute. The top of the volute is provided with a through-hole. The shaft of the motor passes through the through-hole and is connected to the wind wheel. A seal ring is arranged on the volute corresponding to the through-hole. An outer side of the seal ring is provided with an annular groove. The volute is embedded in the annular groove. The middle of the seal ring is provided with a center hole. The middle of the side wall of the center hole is provided with a ring-like convex edge. The shaft passes through the center hole and contacts with the ring-like convex edge.

Abstract: A roller bearing outer race of a hydraulic unit has a body comprising a central section having an exterior curved portion, an exterior angled portion, and a circular inner portion, wherein a central aperture defining a first axis passes through the circular inner portion of the central section, a first arm extending from a first side of the central section, and a second arm extending from a second side of the central section. A race within the circular inner portion of the central section, the race defined by a first race wall and a second race wall and wherein a thickness of the first arm and the second arm is about 0.450 inches (1.143 cm) and a radial distance of an exterior surface of the exterior curved portion from the first axis is about 0.657 inches (1.669 cm).

Abstract: A sealing device comprising a sealing circular piece, an inner ring and an outer ring, one of the two rings being able to rotate relative to an axis, the circular piece being arranged between the two rings and comprising two circular lips arranged in a groove at right angles to the axis of rotation, a top lip and a bottom lip substantially at right angles to the top lip, the bottom lip has a radius of curvature directed towards the interior, the groove being provided on the outer face of the inner ring and a third circular lip pressing on the outer face of the inner ring, and a part is fixed in an orifice formed in the outer ring.

Abstract: A shaft seal includes more than one sealing module, at least one fluid supply and a fluid discharge, and a main seal which is subject to a greatest partial pressure difference. A second main seal is a radial double seal, which includes two gas seals, each gas seal having a rotating sealing surface and a stationary sealing surface, wherein the two sealing surface pairs are located opposite each other in a sealing plan, and wherein the two sealing planes have substantially radial extension to the shaft.

Abstract: A labyrinth seal assembly, bearing assembly therewith, and method of construction thereof, has an outer rigid carrier and an inner sleeve. The carrier has an outer cylindrical flange and a radially inwardly extending leg and the sleeve has a cylindrical wall and a radially outwardly extending flange. A seal body is attached to at least one of the leg and the flange, wherein a labyrinth passage extends between the seal body and the sleeve, from an air side of the assembly to an oil side of the assembly, during normal use of the assembly.

Abstract: A thermal actuator for a rotating shaft shutdown seal that has a piston with a portion of its axial length enclosed within a cylinder shell with a material, such as a fusible link that changes state or deforms above a given temperature, interposed between a closed end of the cylinder and one end of the piston. The piston is spring biased toward the material and moves toward the closed end of the cylinder when the given temperature is reached and the deformation or change of state of the material makes room for the piston to move toward the closed end. Movement of the piston is transferred through a piston rod to activate the seal.

Abstract: A sealing unit having a first annular rotating shield and a second annular shield is provided. The second annular shield is fixed and arranged in front of the first shield for delimiting therebetween a first annular chamber and a sealing ring provided with at least a first and a second annular lips, which extend axially and radially projecting from a flange portion of the second shield and towards a flange portion of the first shield, inside the annular chamber. The first shield integrally supports a third annular lip that extends projecting from the first shield towards one of the first and second lips without touching it for defining a second dynamic labyrinth seal between the first and second shield and inside the annular chamber.

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: A sliding component is characterized in that dimples are provided on one sealing face of a pair of sliding parts that mutually slide relative to each other, where the cavitation formation area on the upstream side of each dimple is positioned closer to the low-pressure fluid side and the positive-pressure generation area on the downstream side is positioned closer to the high-pressure fluid side, and the fluid that has been suctioned in the cavitation formation area of each of the above dimples travels in the dimple and is returned to the high-pressure fluid side from the positive-pressure generation area.

Abstract: An adjustable seal apparatus for mounting a mixing apparatus having a movable shaft in sealed engagement with a wall of a vessel and in a selected orientation with respect to the wall of the vessel. The adjustable seal apparatus includes a seal mechanism for creating a gas-tight seal between the shaft of the mixing apparatus and the wall of the vessel and an adjustable mounting mechanism for selectively positioning the shaft in a desired orientation.

Abstract: There is disclosed a rotary air-riding seal between a first structure and an adjacent second structure, including: first and second seal members defining respective seal surfaces facing to one another. The first seal member is provided on the first structure and the second seal member is mounted to the second structure towards the first seal member. At least one of said seal members is configured to generate a riding film of air between said seal surfaces. One of said seal members is supported for axial oscillation relative to the other seal member by a secondary support arrangement configured to bias said seal member towards the other seal member. The said secondary support arrangement accommodates relatively high frequency axial movements between the seal members.

Abstract: A barrier system for a dual mechanical seal, the system comprising means for controlling barrier fluid pressure relative to product pressure. The pressure control means comprises means for monitoring the volume of barrier fluid in the system and for supplying additional fluid to the system to maintain the volume within a desired range. The system further comprises means for maintaining the barrier fluid pressure at a pre-determined pressure above product pressure.

Abstract: The disclosure describes a windback device for a circumferential seal within a turbine engine. The windback device includes an annular collar at one end of an annular fluid seal housing, at least one inclined thread, and a plurality of inclined baffles separately disposed along an outer circumferential surface of a rotatable runner. The housing is adapted at another end for an annular seal. The collar has an opening therethrough sized to receive the runner without contact. The annular seal surrounds and sealingly engages the runner. The threads extend from an inner face of the collar toward the runner. The baffles are separately recessed in or raised above the outer circumferential surface of the runner. The baffles are interposed between the runner and threads. Each baffle is separated from the threads via a radial clearance. Threads and baffles direct lubricant away from the annular seal.

Abstract: A system and method for sealing a shaft disposed for rotation within a casing, where two axially-spaced seal rings of an oil film seal extend around the shaft and define a clearance therebetween. Oil is pumped into the clearance from an oil reservoir and a portion of the oil is received in an annular port defined in the casing between an outer labyrinth seal and one of the axially-spaced seal rings. The oil mixes with a process gas to for an oil and gas mixture. A blower is in fluid communication with the annular port and circulates the oil and gas mixture to a trap where the oil is separated from the process gas and a separated process gas is returned back to the annular port.

Abstract: Fluid transfer seal assemblies for transferring process fluid between a stationary component and a rotating component, fluid transfer systems, and methods for transferring process fluid between the stationary and rotating components via a fluid transfer assembly are provided. A rotatable component includes a sealing surface. The fluid transfer seal assembly comprises a face seal ring having at least one segment of a fluid passageway and a sealing face configured to be disposed opposite of the sealing surface. The sealing face or the opposed sealing surface includes a geometric feature for forming a hydrodynamic seal therebetween. A secondary seal is configured to be disposed between and contacting the face seal ring and the stationary component.

Abstract: An earth bit includes a cutting cone carried by a lug, and an interstice seal assembly which forms a dynamic seal with a radial interstice lug surface of the lug. The interstice seal assembly includes a rigid sealing ring having lengthened and shortened arm portions. The lengthened arm portion extends outwardly from the shortened arm portion, and engages the radial interstice lug surface.