Abstract: A system and methodology are provided for enhancing the life and usefulness of a thrust bearing assembly in a submersible pumping system component. The technique utilizes a thrust runner positioned adjacent a thrust bearing in the submersible pumping system component. The thrust runner is rotated relative to the thrust bearing via a shaft. Gas that may accumulate in a lower region beneath the thrust runner is vented through a passageway from the lower region to an upper region above the thrust runner. The gas is vented to help maintain a hydrodynamic fluid film between the thrust runner and the thrust bearing.

Abstract: Various systems are provided for a seal chamber of a centrifugal pump. In one example, a seal chamber housing for a centrifugal pump includes a central cavity internal to the seal chamber housing, the central cavity having a greater diameter at a first end of the seal chamber housing and a smaller diameter at a second end of the seal chamber housing, and at least one flushing passage at the second end of the seal chamber housing. The at least one flushing passage is configured to directly fluidically couple the central cavity to an exterior of the seal chamber housing. In this way, increased cooling and debris removal may be provided to a seal positioned within the seal chamber housing.

Abstract: A seal system has: a first member; a seal carried by the first member and having a seal face; and a second member rotatable relative to the first member about an axis. The second member has: a seat on a first piece of the second member, the seat having a seat face in sliding sealing engagement with the seal face; and a radially outwardly closed collection channel for collecting centrifuged oil; a second piece encircling and attached to the first piece and having a circumferential array of apertures; and cooperating with the first piece to define a plenum; and a flowpath from the collection channel passing radially outward axially spaced from the seat face to cool the seat face and passing axially away from the seat face in the plenum.

Abstract: There is provided a cryocooler including a displacer, a displacer drive mechanism, a connecting rod that connects the displacer drive mechanism to the displacer, and a sealing component that supports the connecting rod to allow axial reciprocation thereof. The sealing component includes a bush through which the connecting rod is inserted and defining a radial clearance functioning as a non-contact seal between the connecting rod and the bush, a first contact seal held by the bush on a first side thereof toward the displacer drive mechanism with respect to the radial clearance, and sealing the radial clearance, and a second contact seal held by the bush on a second side thereof toward the displacer with respect to the radial clearance, and sealing the radial clearance.

Abstract: A circumferential seal assembly for use between a higher pressure side and a lower pressure side is presented. The seal assembly includes a primary sealing ring, a second sealing ring, a third sealing ring, and an insert. The primary sealing ring sealingly engages both a face sealing surface along a housing and a radial sealing surface along a rotatable element. The primary sealing ring, the second sealing ring, and the third sealing ring cooperate, in combination with the housing, the rotatable element, and/or the insert, both to define and to separate a first cavity at the higher pressure side and a second cavity at the lower pressure side. In some embodiments, the second sealing ring sealingly engages a face of the primary sealing ring. In other embodiments, the second sealing ring sealingly engages a circumferential surface of the primary sealing ring.

Abstract: A stuffing box for sealing a top opening of a vertical pump, including: a housing with a vertical tube for rotatably disposing a shaft of the vertical pump, an annular bearing that: divides the vertical tube in a lower half and an upper half, and fills an annular space between an inner wall of the vertical tube and the shaft, such that as less fluid as possible passes from the lower half through the annular bearing to the upper half, an outlet pipe for discharging the fluid passing through the annular bearing.

Abstract: A sealing system includes: a double mechanical seal having a pump-side sealing mechanism (10, 12) and an atmospheric-side sealing mechanism (11, 13); a pump mechanism (19) driven by a rotational shaft (1); a first medium circulation line (30) for circulating a fluid barrier-and-cooling medium between a first chamber (22a) and a second chamber (22b), the first medium circulation line (30) being coupled to the first chamber (22a) and the second chamber (22b), the fluid barrier-and-cooling medium being different from a fluid handled by the centrifugal pump; a heat exchanger (21) and a shut-off valve (28) attached to the first medium circulation line (30); a second medium circulation line (31) bypassing the shut-off valve (28); and a medium pressurizing pump (45) and an on-off valve (23) attached to the second medium circulation line (31).

Abstract: Provided is a cartridge radial double-end-face split type mechanical seal, including: a shaft sleeve, a gland, a rotary ring, an outer stationary ring, and an inner stationary ring which are all of split type structure, split pieces of the shaft sleeve are spliced and sleeved on a main shaft, a rotary ring groove is disposed at the bottom of the shaft sleeve, split pieces of the rotary ring are spliced and fixed in the rotary ring groove, split pieces of the outer stationary ring are spliced and sealingly connected with the rotary ring, split pieces of the inner stationary ring are also spliced and sealingly connected with the rotary ring, an outer push ring is disposed at the top of the outer stationary ring, an inner push ring is disposed at the top of the inner stationary ring.

Abstract: Provided is a cartridge axial double-end-face split type mechanical seal, including: a shaft sleeve, a gland, a medium rotary ring, a medium stationary ring, an atmospheric rotary ring, and an atmospheric stationary ring which are all center-split, wherein the shaft sleeve is sleeved on a main shaft, a medium rotary ring groove is disposed at the bottom of the shaft sleeve, the medium rotary ring is fixed in the medium rotary ring groove, the medium stationary ring is sealingly connected with the medium rotary ring, and a first push ring is disposed at the top of the medium stationary ring; an atmospheric rotary ring groove is disposed at the top of the shaft sleeve, the atmospheric rotary ring is fixed in the atmospheric rotary ring groove, the atmospheric stationary ring is sealingly connected with the atmospheric rotary ring.

Abstract: One or more techniques and/or systems are disclosed for mitigating fluid loss or leakage from a fluid pump with a rotating shaft driving a pumping mechanism. A packing gland component can have an internal seal formed by two dynamic O-rings that allows for use of lubricants at high pressures, as well as an outer seal for greater prevention of fluid loss. Further, the packing gland component can be a retrofit for existing packing gland components to provide for greater life and efficiency as compared to the existing packing gland components. Additionally, in some implementations, a sleeve may be fixedly attached to the rotating shaft between the packing gland and the shaft to provide a wear point for the packing gland.

Abstract: The invention relates to a mechanical seal arrangement for sealing on a rotating component (21), comprising a slide ring seal (2) having a rotating slide ring (3) and a stationary slide ring (4), which define a sealing gap (5) between the sliding surfaces (3a, 4a) thereof, a recirculation conveyor (7) arranged adjacent to the rotating slide ring (3) wherein the recirculation conveyor (7) comprises a recirculation line (19) in which a cooling device (20) for cooling the recirculated fluid is arranged, a recirculation rotor (8) and a hollow cylindrical housing (9), wherein the recirculation line (19) leads to a cavity (6) in the region of the sealing gap (5) of the sliding ring seal (2), wherein the hollow cylindrical housing (9) comprises an inner shell surface (11) and an outer shell surface (12) and wherein a conveyor channel (10) is provided on the outer shell surface (12), which conveyor channel (10) is formed along the outer shell surface (12) from a start portion (13) to an end portion (14) wherein the s

Abstract: Low-torque sliding components have sliding surfaces rotated relative to each other with an annular mating ring and an annular seal ring facing each other. The sliding surface of at least one of the mating ring and the seal ring has therein a plurality of multi-stepped recess portions formed in a circumferential direction. Relative rotation and sliding of the mating ring and the seal ring causes the multi-stepped recess portions to generate a dynamic pressure, and the multi-stepped recess portion is formed in a stepwise shape in a cross-sectional view by a dynamic pressure recess portion and a static pressure recess portion with the dynamic pressure recess portion surrounding the static pressure recess portion deeper than the dynamic pressure recess portion.

Abstract: The present invention provides a method of replacing a failed pump seal of a pump having a pump housing and a rotating pump shaft. As part of the method, there is provided a specially configured rescue seal. The rescue seal is placed on the pump shaft above the failed seal so that the pump shaft extends through both the failed seal and the rescue seal. In order to affix the rescue seal to the pump shaft and above the failed seal, a plurality of studs are first attached to the pump housing after removing some of the bolts that fasten the failed seal to the pump housing. The failed seal is then secured to the studs with nuts. Nuts are then placed on the studs to secure the rescue seal to the studs above the failed seal.

Abstract: A turbomachine has a bearing in a bearing compartment. A first seal system isolates the bearing compartment and has: a first runner; a second runner; an inner seal encircling the first runner; and an outer seal encircling the second runner. The inner seal has a static clearance with the first runner. The outer seal has a static clearance with the second runner, greater than the inner seal static clearance. The first runner has an inner portion cantilevered inward. The second runner has an outer portion cantilevered outward.

Abstract: An assembly is provided for rotational equipment. This assembly includes a seal land and a seal element. The seal land extends circumferentially around and is configured to rotate about an axial centerline. The seal element is abutted against and is sealingly engaged with the seal land. The seal element extends circumferentially around the axial centerline. The seal element includes porous material, an exterior surface and a seal element passage. The seal element is configured to flow lubricant from the seal element passage, through the porous material, to the exterior surface.

Abstract: The invention relates to a tribological body (10) comprising a body with a sliding surface (12) and at least one hollow space through which a fluid can flow. The body (10) consists of a first monolithic partial body (14) comprising the sliding surface (12) and of a second monolithic partial body (16) connected to the first one, wherein the hollow space is designed as a conduit (20) which runs at least in sections inside the second partial body and is delimited from the latter at least on the bottom side and the side surface sides.

Abstract: The present disclosure refers to a modular motor pump unit having an outer housing with two open ends, two housing covers attachable to the open ends, at least one electric motor arranged in the outer housing, at least one pump element arranged in the outer housing and drivable by the electric motor, and at least one connection portion arranged externally on the outer housing. The outer housing forms a hydraulic fluid reservoir, a pressure channel extending from the pump element to the connection portion. A return channel extends from the connection portion to the inside of the outer housing. An additional housing is provided between the outer housing and at least one housing cover. A heat exchanger element is arranged in the additional housing and the return channel is connected to the additional housing and the additional housing is connected to the hydraulic fluid reservoir.

Abstract: A gas turbine engine may include a liftoff carbon seal assembly. Liftoff carbon seal assembly may include a static seal support structure, a magnetic carrier spring assembly coupled to the static seal support structure, a nonferrous metal slab magnetically associated with the magnetic carrier spring assembly and coupled to the static seal support structure. In various embodiments, a combination of the magnetic carrier spring assembly and the nonferrous metal slab create a counter-force using an eddy current to oppose a motion of the magnetic carrier spring assembly.

Abstract: A rotor used for a motor that rotates an impeller of a fuel pump includes a cylindrical bonded magnet that forms a plurality of magnetic poles, an inner core that is a cylindrical component provided inward of the bonded magnet and that has both axial end surfaces exposed to outside, and a rotating shaft that includes a connecting end, which has a pair of flat surfaces parallel to each other and is fitted to the impeller, and that is provided to pass through the inner core inward thereof. A cross section of the connecting end has a centroid coinciding with a rotational axis.

Abstract: The invention relates to a sealing arrangement (1) for conveying devices, in particular for gear pumps, in which an inner space (5) can be sealed off from an outer space (6), wherein the sealing arrangement comprises at least two parts (2, 3) each having at least one sealing surface (20, 21), wherein the sealing surfaces (20, 21) comprise: a first seal (11) along a first, medial perimeter of the sealing surface (20, 21), a second seal (12) along a second, lateral perimeter of the sealing surface (20, 21), a recess (15) between the first seal (11) and the second seal (12), characterized in that the recess (15) can be connected to a source (30) of a flushing medium such that the recess (15) can be actively flushed with the flushing medium.

Abstract: A reduction component is linked to the output shaft of a hydraulic motor, and reduces the rotational speed of the hydraulic motor. A housing component has a rotation-side housing that is rotated around a horizontal rotational axis by the rotation of the hydraulic motor whose speed has been reduced by the reduction component, and a stationary-side housing that rotatably supports the rotation-side housing. The housing component houses the reduction component. A sealing component is disposed inside a gap between the rotation-side housing and the stationary-side housing, and seals the gap. An oil splasher splashes up lubricating oil to provide the lubricating oil to the upper part of the sealing component. The oil splasher has a plurality of concave components formed in the portion of the rotation-side housing facing a seal disposition space in which the sealing component is disposed.

Abstract: Provided is a mechanical seal that ensures the flow rate of a cooling fluid, which is necessary to cool a slide seal surface, and that can prevent erosion from occurring. In the mechanical seal, the ratio between the depth and the width of each groove of a partial impeller is 2.0-5.0; the ratio of the distance between the grooves of the partial impeller to the width of a weir of a casing is 0.5-3.1; the ratio of the total length of the widths of the grooves of the partial impeller to the total length of the peripheral surface of the partial impeller, in which the grooves are formed, is 0.28-0.8; or the ratio of the length of the projected portion of the tip of each groove of the partial impeller to the width of a cooling liquid discharging groove of the casing is greater than 0 and less than or equal to 0.65.

Abstract: In a centrifugal steam compressor having sealing water discharge at pressure higher than atmospheric pressure, a simple structure in which a high-pressure piping system is omitted as much as possible from a sealing water circulation system is realized. A shaft seal system 50 is capable of supplying high-pressure sealing water and low-pressure sealing water.

Abstract: A system for the contactless sealing of a rotatably mounted shaft with respect to a housing, and a gear unit, oil being provided in the interior of the housing, in particular, the rotating shaft protruding from the interior into the outer area; a centrifugal disk, joined in rotatably fixed manner to the shaft, having at least partially radially extending bores that connect oil from a centrifugal chamber to a collection chamber surrounding the centrifugal disk.

Abstract: A system for the contactless sealing of a rotatably mounted shaft with respect to a housing, and a gear unit, oil being provided in the interior of the housing, in particular, the rotating shaft protruding from the interior into the outer area; a centrifugal disk, joined in rotatably fixed manner to the shaft, having at least partially radially extending bores that connect oil from a centrifugal chamber to a collection chamber surrounding the centrifugal disk.

Abstract: A sealing system for a pump having a plunger includes a housing having an internal chamber adapted to receive a portion of the plunger. Primary and secondary seals are located within the internal chamber and adapted to sealingly engage the plunger. The primary seal communicates with the fluid being pumped. A barrier fluid chamber contains a barrier fluid in contact with the primary seal and the secondary seal. A pressure referencing device has an inlet port in communication with the pumped fluid and an outlet port providing fluid at a pressure magnitude equal to a peak pressure of the pumped fluid. A pressurizing device is in communication with the fluid at the peak pressure and the barrier fluid to maintain the barrier fluid pressure at a magnitude greater than the peak pressure of the pumped fluid such that the pumped fluid is restricted from leaking past the primary seal.

Abstract: A contact seal assembly for a shaft of a gas turbine engine includes a seal runner adapted to be connected to the shaft and rotatable relative to a carbon ring. The seal runner includes concentric inner and outer annular portions radially spaced apart to define at least one internal fluid passage between the inner and outer annular portions of the seal runner.

Abstract: A rotary oil feedthrough is provided for sealing off a pressurized oil compartment between a rotatable shaft and a shaft mount, where the rotary oil feedthrough displays a radial oil passage for connecting an oil duct of the shaft and/or the mount to the pressurized oil compartment in fluid-permeable fashion, and has a seal arrangement that seals off the pressurized oil compartment on both sides in the axial direction of the shaft. The rotary oil feedthrough displays a sealing ring carrier that can be fastened to the shaft or the mount in non-rotating and fluid-tight fashion, the sealing ring carrier being arranged coaxially to the shaft or the mount, and an adapter that can be positioned on the other component of shaft and mount in fluid-tight fashion, and is surrounded laterally by the sealing ring carrier in the axial direction of the shaft.

Abstract: A shaft sealing assembly for static and dynamic sealing includes a stator member attached to a housing and a rotor member attached to a shaft rotatable about an axis. The rotor member includes first and second pocket sections extending from upper and lower radial flanges extending in a cantilevered fashion from a tubular member. At least one static sealing member is attached to and encapsulates each pocket section. Each static sealing member presents a core portion and a pair of radial lips extending from the core portion. The stator member presents an annular wall extending to inner walls inclined conically to a central radial rim or flange separating two pocket portions and the static sealing members presenting a contact and frictionally engaging with the central radial rim as the rotor member is at a stand-still or static position.

Abstract: Described is a device (1) for sealing a power station pump. The device (1) includes a pump housing (10) with first and second ducts (15, 16) for passage of a fluid, and a shaft (20) including a first passage (51) for the fluid, a mechanical packing (70) mounted between the shaft (20) and the pump housing (10) and friction elements for rubbing-together a rotating part (71) and a stationary part (72).

Abstract: An intershaft seal system capable of communicating a balanced pressure profile onto forward and aft faces along a piston ring is presented. The seal system includes forward and aft mating rings and a piston ring. Mating rings include a plurality of divergent flow grooves adjacent to the piston ring. Each divergent flow groove includes a pair of grooves which intersect at and are substantially symmetric about an apex. The piston ring includes channels which direct a fluid from a high pressure region upward or downward and through the piston ring and onto the divergent flow grooves. The divergent flow grooves separate the fluid in a symmetrically divergent fashion prior to communication onto the piston ring. The divergent flow grooves communicate a substantially symmetric pressure force onto each side of the piston ring so as to minimize twist thereof, thus reducing wear along the piston ring and increasing seal life.

Abstract: Seals having incorporated heat pipes are disclosed relating to pumps and other comparable sealing equipment that may include a seal face, a cavity, a wicking material within the cavity, and a working fluid within the cavity. The seals may be used as a pump seal rings and in other applications having comparable heat transfer requirements.

Abstract: A centrifugal pump for delivering hot fluids, having a contacting shaft seal, a seal housing (13) for the shaft seal (14), and a return line (8) for a partial flow of the delivered fluid, in which no delivered fluid is discharged out of the seal housing (13); a separate housing cover (9) is disposed between the seal housing (13) and the pump housing (1); there is a contact surface which minimizes heat transfer between the seal housing (13) and the housing cover (9); and the return line (8) is connected to the housing cover (9) and/or to the pump housing (1).

Abstract: A pumping ring 46 producing an axial flow of sealed flow is secured to a rotary shaft 6 at an axial position different from a rotary ring 56 so that the sealed fluid positioned in the sealed space 33 flows along the axial direction of the rotary shaft 6. A discharge hole 14 is formed on an inner circumferential surface of a seal cover 8 positioned in the downstream side of the axial flow of the sealed fluid resulting from a rotation of the pumping ring 46. An inflow hole 15 is formed in the upstream side of the axial flow of the sealed fluid resulting from the rotation of the pumping ring 46, so that the sealed fluid discharged from the discharge hole 14 returns to the inside of the sealed space from the inflow hole 15.

Abstract: A mechanical seal device is provided for use when fluid pressure is frequently switched between positive and counter pressures. A rotary ring is provided on a rotary shaft and a stationary ring assembly is provided on which the stationary ring side sliding face is formed. A seal cover is provided containing the stationary ring assembly on an inner diameter side and supports the freely moving assembly in an axial direction of the rotary shaft along with a first O-ring to seal the first fluid and a second O-ring to seal the second fluid. A low-pressure chamber is sealed from the first fluid and the second fluid and maintains pressure lower than those of the first and the second fluids.

Abstract: A shaft-seal device for high-temperature fluid including a seal case (2) formed as a metallic cylindrical structure of a single unit and comprised of a main body portion (2a, 2b, 2c), first and second holding portions (2d, 2e), first and second partition portions (2f, 2h), a channel formation portion (2g) forming a minute annular channel (27) with the outer circumference surface of a rotary shaft (1), and an o-ring holding portion (2i). The seal case is installed in an apparatus housing (8) with first and second o-rings (2m, 2n) in between. The intra-seal case region (A1), in which sealing rings (31, 32, 41, 42, 51, 52) of mechanical seals (3, 4, 5) are provided, and the high-temperature fluid region, which is an intra-apparatus housing region (A), are partitioned by a cooling chamber (28) into and from which coolant (82) is supplied and discharged via feed/discharge coolant paths (80, 81).

Abstract: A seal assembly for a turbomachine includes a seal ring rotatable between a first position and a second position and having a plurality of tunnels. Also included is a back ring located adjacent the seal ring and having a plurality of apertures that align with more of the plurality of tunnels of the seal ring when at the second position than at the first position. Further included is a retention piece operably connecting the seal ring and the back ring.

Abstract: A cartridge-type bearing seal includes removably connected stator and rotor sections. The stator section supports a distribution ring that divides an internal annular volume into radially outside and inside portions. The ring has at least one tangentially oriented duct. When pressurized purge fluid is supplied to the outside portion, the fluid flows through the ducts to induce tangential fluid flow within the inside portion, which causes circumferentially uniform fluid pressure in the annular volume adjacent the rotating shaft. The pressurized fluid traverses a flow path along the shaft and eventually out of the bearing housing, to prevent contaminant ingress between the rotating shaft and the bearing housing. This bearing seal eliminates the need to machine a tangentially oriented passage in the bearing housing.

Abstract: A hydrodynamic face seal has a rotating first ring and a stationary second ring. The rotating first ring has an inner face. The stationary second ring has an inner face adjacent to the inner face of the rotating first ring. The inner face of the rotating first ring includes a groove having a fluid inlet portion and a hydrodynamic force generating portion. The fluid inlet portion of the groove has a depth greater than the hydrodynamic force generating portion of the groove. The fluid inlet portion has a minimum depth configured to create a higher pressure than a surrounding pressure around the rotating first ring, while not generating a hydrodynamic or hydrostatic force in the fluid inlet portion.

Abstract: A pneumatically controlled, two part, rotational face seal is disclosed that has dual modes of operation. There is a first, static mode where a face of each of the two parts of the seal touch each other and provide an air, liquid and water vapor tight, very low leakage rate with high rotational friction between the two parts of the seal. In the second, dynamic mode wherein the two parts of the seal are separated by inert gas and the face seal functions as a gas bearing having very low rotational friction as the two parts are rotated with respect to each other. One part of the seal may be attached to a rotatable turret and the other part may be attached to a base on which the turret is mounted.

Abstract: A gyratory crusher, including an outer crushing shell and an inner crushing shell forming between them a crushing chamber, the crushing chamber communicating with a discharge zone that forwards crushed material from the crushing chamber and out of the crusher. The inner crushing shell is supported on a crushing head. The outer crushing shell is supported on a crusher frame. At least one sealing arrangement is between the discharge zone and a working part zone in which at least one bearing for the crushing head to perform a gyratory movement relative to the crusher frame is arranged. The sealing arrangement includes a sealing surface, and a sealing member arranged to seal against the sealing surface and including an inner circumferential flexible sealing lip, an outer circumferential flexible sealing lip and at least one inlet for pressurized fluid to be supplied to an overpressure zone arranged between the inner and outer sealing lips and the sealing surface.

Abstract: Disclosed is a completely nonmetallic pipe connection mechanism for a seal device. In the pipe connecting mechanism of the present invention, a metallic reinforcing pipe (60) is screwed in a through-bore (53) of a flange (50), and a resin connecting pipe (70) is inserted into a through-bore (67) and an expanding diameter portion (68) of the metallic reinforcing pipe (60). Also, a metallic cap (80) is installed in a head (63) of the metallic reinforcing pipe (60), and a large diameter portion (74) of the resin connecting pipe (70) is sandwiched between the metallic reinforcing pipe (60) and the metallic cap (80). Also, a tapered male screw (96) of a resin connector (90) is screwed in a tapered female screw (76) of the large diameter portion (74) of the resin connecting pipe (70) to connect a tube (98) with the resin connecting pipe (70).

Abstract: A slide ring seal for high circumferential velocities for sealing liquids with little or no electrical conductivity, such as low-salt feed water for feed water pumps including a pair of slide rings, one of which is rotationally fixed and the other of which rotates with a rotating component. The slide rings have interacting sliding surfaces which form a region loaded with the liquid to be sealed relative to a sealing gap. One ring is formed of material with satisfactory electrical conductivity and the other of low conductivity material. The seal is arranged in a dead-end circuit of a rotating component to be sealed and is connected to a cooling system. A metering device is provided in the circuit for introducing a substance as a function of a slide ring seal leak to maintain the electrical conductivity of the liquid between 3 and 500 ?S/cm.

Abstract: A gas seal for aerospace engines has a stationary seal housing, a rotating seal plate mounted on the engine drive shaft and a carbon ring seal movably supported in the housing with a face which mates with the face of the seal plate to create a gas seal therebetween. A plurality of flexible pins have first ends supported on the housing and second ends slidably connected with the carbon ring seal to permit the latter to shift axially. A plurality of compression springs bias the two seal faces together. The housing has a first twist lock which selectively engages a second twist lock on the carbon ring seal to movably retain the latter in the housing. The second ends of the spring pins resiliently deflect during mutual rotation of the carbon ring seal and the housing to facilitate engagement and disengagement of the first and second twist locks.

Abstract: An intershaft seal system capable of communicating a balanced pressure profile onto forward and aft faces along a piston ring is presented. Seal system includes forward and aft mating rings and a piston ring. Mating rings include a plurality of divergent flow grooves adjacent to the piston ring. Each divergent flow groove includes a pair of grooves which intersect at and are substantially symmetric about an apex. The piston ring includes channels which direct a fluid from a high pressure region upward, downward, or directly through the piston ring and onto the divergent flow grooves. The divergent flow grooves separate the fluid in a symmetrically divergent fashion prior to communication onto the piston ring. The divergent flow grooves communicate a substantially symmetric pressure force along the radial width of the piston ring so as to minimize twisting thereof, thus reducing wear along the piston ring and increasing seal life.

Abstract: A mechanical seal having a seal cover capable of being installed on the outer surface around the circumferential surface of a hole of a seal housing and having an inner circumferential surface surrounding a shaft; a bellows having a first installation portion and a second installation portion, the first installation portion being formed by sealingly fitting the inner circumferential surface of the seal cover to one end circumferential surface of the bellows, the seconds installation portion being at the other end circumferential surface of the bellows, the first installation portion and the second installation portion forming a tubular portion between the portions, the tubular portion being formed as an elastic means surrounding the shaft; a stationary sealing ring sealingly installed on the circumferential surface of the second installation/portion and having an annular sealing surface pressed by the elastic means of the bellows; a rotating sealing ring having an annular relative sealing surface facing the s

Abstract: A delivery unit (40) for automatically delivering a viscous sealant at a predetermined pressure to a stuffing box (70) of a shaft (20) is disclosed. The delivery unit (40), such as a pressure booster incrementally displaceable piston, is controlled to deliver the sealant at a predetermined pressure on demand when the pressure of the sealant within said stuffing box is less than the predetermined delivery pressure being sufficient to promote adhesion of the sealant onto a shaft segment and to thereby prevent or retard the egress of working fluid from a corresponding working chamber (17) of a machine adapte to perform work by the shaft. A system for reducing the pressure of sealant within a stuffing box by use of the delivery unit and of an impeller-based dynamic seal is also disclosed.

Abstract: A mechanical seal device comprises an attachment component (30) made of resin material having a mounting face (30A) attached with an outer face (60A) of a casing body (60), a fitting face (30C), a ring shape groove face (30B) and a shutoff face (30S) which are formed on an inner circumferential face, and a cooling fluid passage (40) communicating with a cooling chamber (R3) in said ring shape groove face (30B). The mechanical seal device further comprises a first seal ring (3) made of a rustless material having a seal face (3A), a second seal ring (10) made of a rustless material having a counter seal face (10A) slidable in closely contact with the seal face (3A), a seal collar (50) made of resin material holding said second seal ring (10) hermetically, and a seal ring (20) having a third seal face (20B1) which closely contacts with said shutoff face (30S). The seal ring (20) is sandwiched between said supporting circumferential face (50A) and a circumferential section (10B) of the second seal ring (10).

Abstract: Provided is a small mechanical seal device which can efficiently wash a sealing surface, and can appropriately seal a sealed fluid and a quenching liquid. In a mechanical seal device (1), two sealing surfaces, i.e., an objective fluid sealing surface (131) and a quenching fluid sealing surface (132) are formed in a stationary sealing ring (130), and a quenching fluid passes through a sealing groove (133) provided between the sealing surfaces. Quenching bores (134) which penetrate through the stationary sealing ring (130) in the axial direction are formed in the stationary sealing ring (130). The quenching fluid passes between an intermediate chamber (C) provided on the back side of the stationary sealing ring (130) and the sealing groove (133) via the quenching bores (134).

Abstract: A cartridge seal device includes a sleeve, a gland unit, a first seal unit, a pumping ring, and a second seal unit. The gland unit includes a first gland and a second gland. The first seal unit includes a first rotary ring disposed around the sleeve and rotatable along with the sleeve, a first stationary ring abutting against the first rotary ring, a compression ring abutting against the first stationary ring, and at least one first spring disposed within a retaining slot of the first gland and abutting against the compression ring. The first stationary ring has one end in abutment with the first rotary ring, and an opposite end formed with at least one notch. The compression ring has aligned guide pieces extending respectively into the notch of the first stationary ring and an engaging recess of the first gland.