Introduction, Circulation, Or Removal Of Fluid Patents (Class 277/408)
  • Patent number: 12152675
    Abstract: The invention relates to a mechanical seal arrangement comprising a first mechanical seal (2) having a first rotating sliding ring (22) and a first stationary sliding ring (21) defining a first sealing gap (20) therebetween, a second mechanical seal (3) having a second rotating sliding ring (22) and a second stationary sliding ring (32) defining a second sealing gap (30) therebetween, a housing (4) having an inlet (40) and an outlet (41) for a cooling liquid, a rotating conveying sleeve (5) joined to the first rotating sliding ring (22) and the second rotating sliding ring (32), the conveying sleeve (5) having a plurality of conveying grooves (50) on its outer circumference wherein the first stationary sliding ring (21) is arranged radially outside the conveying sleeve (5) and has an inner circumference (21a) which is arranged eccentrically with respect to an outer circumference (50a) of the conveying sleeve (5) so that a circumferential eccentric gap (6) is formed between the outer circumference (50a) of the
    Type: Grant
    Filed: November 2, 2021
    Date of Patent: November 26, 2024
    Assignee: EagleBurgmann Germany GmbH & Co. KG
    Inventors: Stefan Ledig, Martin Kuntz
  • Patent number: 12152677
    Abstract: A mechanical seal assembly includes a gland assembly having a chamber formed in an inner surface for seating a fluid insert element. The fluid insert element promotes movement of particles present in a slurry process fluid away from a seal interface formed by the sealing surfaces of rotary and stationary seal rings.
    Type: Grant
    Filed: February 20, 2023
    Date of Patent: November 26, 2024
    Assignee: A.W. CHESTERTON COMPANY
    Inventors: Robert James Powers, Henri Vincent Azibert
  • Patent number: 12152676
    Abstract: An annular sliding component has a sliding surface relatively sliding with eccentric rotation. The sliding surface is provided with a dynamic pressure generation groove having an annular shape along a circumferential direction of the sliding surface and a plurality of conduction grooves configured to provide communications between the dynamic pressure generation groove and one of two external spaces of the sliding surface, the external spaces being on an outer diameter side and an inner diameter side of the sliding surface, respectively. An imaginary line passing through one of the conduction grooves and a center point of the sliding surface does not intersect any one of remains of the conduction grooves.
    Type: Grant
    Filed: July 1, 2021
    Date of Patent: November 26, 2024
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventor: Hiroshi Suzuki
  • Patent number: 12085172
    Abstract: A seal assembly, having: a mating ring; a stationary seal ring having a sealing surface and a seat surface; and a primary seal assembly; where the mating ring contacts the sealing surface of the seal ring and the primary seal assembly at least partially surrounds the seal ring and at least partially contacts the seat surface.
    Type: Grant
    Filed: December 5, 2022
    Date of Patent: September 10, 2024
    Assignee: MAE Technical Advisory LLC
    Inventor: Michael LaPresti
  • Patent number: 12025229
    Abstract: An annular sealing device is configured to be mounted in an annular groove provided on the outer periphery of a shaft so as to seal an annular space between the shaft and a housing that rotate with respect to each other, and change the fluid pressure in the space, and maintains the fluid pressure in a target region to be sealed, and slidably contacts a sidewall surface on the low pressure side of the annular groove.
    Type: Grant
    Filed: October 14, 2020
    Date of Patent: July 2, 2024
    Assignee: NOK CORPORATION
    Inventor: Masatoshi Seki
  • Patent number: 12018696
    Abstract: A seal arrangement is described for providing a seal between a rotatable shaft and a housing having a wall through which the shaft extends. The seal arrangement includes, in series, a mechanical seal and a gland seal. The mechanical seal is positioned axially inwardly of the gland seal such that the mechanical seal forms a first stage or primary seal and the gland seal forms a secondary seal.
    Type: Grant
    Filed: July 3, 2020
    Date of Patent: June 25, 2024
    Inventors: Pavol Loderer, Matthew Locke, Paul Clarence, Wilson Bernardo, Jr.
  • Patent number: 12007030
    Abstract: A two-position handpiece coupling seal is provided. The two-position handpiece coupling seal includes a neck disposed at a first end that is configured to receive an implement. The two-position handpiece coupling seal has a first seal disposed about the neck of the two-position handpiece coupling seal. The first seal is configured to engage with a surface of a housing of a handpiece that uses the two-position coupling seal in a first position. The two-position handpiece coupling seal has a second seal disposed about a bore of the two-position handpiece coupling seal at a second end of the two-position handpiece coupling seal opposite the first end. The bore is configured to receive a driveshaft and the second seal is configured to sealingly engage with the driveshaft when the bore receives the driveshaft.
    Type: Grant
    Filed: September 21, 2020
    Date of Patent: June 11, 2024
    Assignee: Gyrus ACMI, Inc.
    Inventor: Kevin Cooper Edwards
  • Patent number: 12000488
    Abstract: The invention relates to a mechanical seal comprising a rotating slide ring and a stationary slide ring defining a sealing gap therebetween, one of the slide rings having at least a first row of a plurality of first grooves with a foot region on a first radius and a head region on a second radius wherein a second circumferential sliding region is provided between the head regions of the radially outermost row of grooves of the slide ring and an outer radial edge of the slide ring, the other of the slide rings having at least a second row of a plurality of second grooves with a foot region at a third radius and a head region at a fourth radius wherein a second circumferential sliding region is provided between the head regions of the radially outermost row of grooves of the slide ring and an external radial edge of the slide ring, wherein the first radius is smaller than the third radius, and wherein the second radius is smaller than the fourth radius.
    Type: Grant
    Filed: January 26, 2021
    Date of Patent: June 4, 2024
    Assignee: EagleBurgmann Germany GmbH & Co. KG
    Inventors: Klaus Lang, Thomas Zauner
  • Patent number: 11946545
    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.
    Type: Grant
    Filed: January 3, 2023
    Date of Patent: April 2, 2024
    Inventor: S. Elwood Yandle, II
  • Patent number: 11933303
    Abstract: Provided is a sliding component capable of stably reducing the frictional resistance between sliding surfaces entailing eccentric rotation. A sliding component has a sliding surface sliding relatively to a facing sliding surface with eccentric rotation. The sliding surface is provided with a plurality of dynamic pressure generation grooves arranged in a circumferential direction and each having, in a plan view, a tapered portion configured to become narrower toward a downstream side in an eccentric rotation direction of the facing sliding surface relatively to the sliding surface.
    Type: Grant
    Filed: July 1, 2021
    Date of Patent: March 19, 2024
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventor: Hiroshi Suzuki
  • Patent number: 11892005
    Abstract: A hydraulic machine includes a first member (1) having a first structure (2) for a hydraulic medium opening in a first interface surface (3) and a second member having a second structure for the hydraulic medium opening in a second interface surface is described, the first interface surface (3) being in contact with the second interface surface, wherein at least one of the members (1) is provided with a support element (6) surrounding the member (1). Such a machine should have a good efficiency. To this end the support element (6) has a strength varying in circumferential direction around the member (1) and/or in thickness direction in a middle region of the member (1).
    Type: Grant
    Filed: June 6, 2022
    Date of Patent: February 6, 2024
    Assignee: Danfoss A/S
    Inventors: Stig Kildegaard Andersen, Poul Erik Hansen, Achuthan Babu
  • Patent number: 11885403
    Abstract: A strain wave gearing has a lubricant sealing structure that prevents a lubricant from leaking to the outside through a gap portion between a hollow input shaft and an end plate. The lubricant sealing structure includes an oil-repellent surface formed on the surface portion facing the gap portion, an oil seal that seals the gap portion, and an oil film forming surface formed at a lip tip surface of the oil seal. The oil-repellent surface has a surface texture in which first fine grooves are formed in a predetermined pattern so that an oil-repellent effect can be obtained with respect to the lubricant. The oil film forming surface has a surface texture in which second fine grooves are formed in a predetermined pattern so that an oil film forming effect of a seal lip grease can be obtained.
    Type: Grant
    Filed: April 10, 2020
    Date of Patent: January 30, 2024
    Assignee: HARMONIC DRIVE SYSTEMS INC.
    Inventors: Daisuke Orii, Syuhei Kobayashi
  • Patent number: 11788540
    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.
    Type: Grant
    Filed: August 8, 2022
    Date of Patent: October 17, 2023
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventor: Arthur Ignatius Watson
  • Patent number: 11773869
    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.
    Type: Grant
    Filed: January 18, 2021
    Date of Patent: October 3, 2023
    Assignee: TRANSPORTATION IP HOLDINGS, LLC
    Inventors: Balaji Hosadurgam Ravindranath, Neil Blythe, Charles Atz
  • Patent number: 11753964
    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.
    Type: Grant
    Filed: May 14, 2021
    Date of Patent: September 12, 2023
    Assignee: RTX Corporation
    Inventors: Nigel David Sawyers-Abbott, Armando Amador, Todd A. Davis
  • Patent number: 11754184
    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.
    Type: Grant
    Filed: February 10, 2021
    Date of Patent: September 12, 2023
    Assignee: SUMITOMO HEAVY INDUSTRIES, LTD.
    Inventor: Shuntaro Adachi
  • Patent number: 11739653
    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.
    Type: Grant
    Filed: January 18, 2022
    Date of Patent: August 29, 2023
    Assignee: Stein Seal Company
    Inventor: Glenn M. Garrison
  • Patent number: 11708839
    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.
    Type: Grant
    Filed: November 24, 2021
    Date of Patent: July 25, 2023
    Assignee: SAUDI ARABIAN OIL COMPANY
    Inventors: Mohammad Qahtani, Andres E. Gonzalez, Muslim A. Alzayer
  • Patent number: 11698080
    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).
    Type: Grant
    Filed: July 18, 2022
    Date of Patent: July 11, 2023
    Assignee: EBARA CORPORATION
    Inventors: Shigeru Yoshikawa, Junichi Hayakawa
  • Patent number: 11668398
    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.
    Type: Grant
    Filed: September 16, 2021
    Date of Patent: June 6, 2023
    Assignee: AGILESENTRY, LLC
    Inventor: Guoping Qu
  • Patent number: 11662024
    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.
    Type: Grant
    Filed: September 16, 2021
    Date of Patent: May 30, 2023
    Assignee: AGILESENTRY, LLC
    Inventor: Guoping Qu
  • Patent number: 11662027
    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.
    Type: Grant
    Filed: October 21, 2021
    Date of Patent: May 30, 2023
    Assignee: Viking Pump, Inc.
    Inventors: Christopher Mihm, John Hall, Andrew Anderson, Michael R. Crawford
  • Patent number: 11619308
    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.
    Type: Grant
    Filed: March 9, 2022
    Date of Patent: April 4, 2023
    Inventors: Tadatsugu Imura, Hiroyuki Hashimoto, Yuichiro Tokunaga, Hideyuki Inoue
  • Patent number: 11619307
    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
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: April 4, 2023
    Assignee: EagleBurgmann Germany GmbH & Co. KG
    Inventors: Kilian Obertanner, Johannes Bauer, Josef Gerg, Stefan Ledig, Joseph Kiermeir, Christoph Rapp
  • Patent number: 11608894
    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.
    Type: Grant
    Filed: November 14, 2019
    Date of Patent: March 21, 2023
    Inventor: S. Elwood Yandle, II
  • Patent number: 11549444
    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.
    Type: Grant
    Filed: February 5, 2021
    Date of Patent: January 10, 2023
    Assignee: Raytheon Technologies Corporation
    Inventors: Michael A. Beinor, Timothy J. Castaldo, Christopher M. Valva, Nasr A. Shuaib, Mitchell D. Panton
  • Patent number: 11454320
    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.
    Type: Grant
    Filed: April 27, 2020
    Date of Patent: September 27, 2022
    Assignee: Raytheon Technologies Corporation
    Inventors: Benjamin Nasman, Michael M. Davis
  • Patent number: 11396946
    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.
    Type: Grant
    Filed: September 4, 2019
    Date of Patent: July 26, 2022
    Assignee: SCHUNK KOHLENSTOFFTECHNIK GMBH
    Inventors: Gert Wahl, Konstantin Lider, Philipp Gingter
  • Patent number: 11053954
    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.
    Type: Grant
    Filed: August 28, 2019
    Date of Patent: July 6, 2021
    Assignee: HAWE HYDRAULIK SE
    Inventors: Gerhard Loerner, Georg Neumair, Thomas Simon, Hartmut Verbeek
  • Patent number: 10465544
    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.
    Type: Grant
    Filed: July 24, 2017
    Date of Patent: November 5, 2019
    Assignee: UNITED TECHNOLOGIES CORPORATION
    Inventors: Richard A. Lomenzo, Daniel L. Gysling, Joseph V. Paturzo
  • Patent number: 10385863
    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.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: August 20, 2019
    Assignee: DENSO CORPORATION
    Inventors: Yuuji Hidaka, Masaya Ootake
  • Patent number: 10036385
    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.
    Type: Grant
    Filed: March 2, 2012
    Date of Patent: July 31, 2018
    Assignee: DOVER PUMP SOLUTIONS GROUP (EUROPE) GMBH
    Inventor: Rene Triebe
  • Patent number: 9958053
    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.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: May 1, 2018
    Assignee: KOMATSU LTD.
    Inventor: Ken Morizono
  • Patent number: 9651156
    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.
    Type: Grant
    Filed: October 25, 2010
    Date of Patent: May 16, 2017
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Hiroshi Aoike, Hideyuki Inoue, Takuji Matsuki, Masaru Nakamura, Hiroki Takeno, Yoshihiro Teshima
  • Patent number: 9644636
    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.
    Type: Grant
    Filed: March 1, 2013
    Date of Patent: May 9, 2017
    Assignee: Hitachi, Ltd.
    Inventors: Taiji Hashimoto, Tao Hu
  • Patent number: 9476505
    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.
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: October 25, 2016
    Assignee: SEW-EURODRIVE GMBH & CO. KG
    Inventors: Ingo Schütterle, Andreas Hess
  • Patent number: 9140364
    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.
    Type: Grant
    Filed: March 1, 2010
    Date of Patent: September 22, 2015
    Assignee: SEW-EURODRIVE GMBH & CO. KG
    Inventors: Ingo Schütterle, Andreas Heβ
  • Patent number: 9027932
    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.
    Type: Grant
    Filed: August 26, 2010
    Date of Patent: May 12, 2015
    Assignee: Clyde Union Inc.
    Inventors: Herbert H. Tackett, James A. Cripe, Gary Dyson, Peter Thompson
  • Publication number: 20140369832
    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.
    Type: Application
    Filed: June 13, 2013
    Publication date: December 18, 2014
    Inventors: Daniel BLAIS, Alain Lewis, Alain C. Martel
  • Patent number: 8910946
    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.
    Type: Grant
    Filed: July 22, 2010
    Date of Patent: December 16, 2014
    Assignee: GAPI Technische Produkte GmbH
    Inventor: Dieter Meller
  • Publication number: 20140361490
    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.
    Type: Application
    Filed: December 14, 2012
    Publication date: December 11, 2014
    Applicant: AKTIEBOLAGET SKF
    Inventors: Sven Anders Jönsson, Yefim Epshetsky, Bryan Uncapher
  • Publication number: 20140353922
    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).
    Type: Application
    Filed: June 4, 2013
    Publication date: December 4, 2014
    Inventors: Nicolas Nebout, Guillaume Becouarn
  • Patent number: 8888104
    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.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: November 18, 2014
    Assignee: Stein Seal Company
    Inventor: Glenn M. Garrison
  • Publication number: 20140327211
    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.
    Type: Application
    Filed: May 6, 2013
    Publication date: November 6, 2014
    Applicant: Board of Supervisors of Louisiana State University and Agricultural and Mechanical College
    Inventors: Michael M. Khonsari, Nian Xiao
  • Patent number: 8870521
    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).
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: October 28, 2014
    Assignee: KSB Aktiengesellschaft
    Inventors: Bernhard Brecht, Uwe Bruhns, Frank Sehr
  • Publication number: 20140232070
    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.
    Type: Application
    Filed: May 18, 2012
    Publication date: August 21, 2014
    Applicants: EAGLE BURGMANN JAPAN CO., LTD., EAGLE INDUSTRY CO., LTD.
    Inventors: Yoshiaki Takigahira, Yoji Oshii, Atsushi Kaneko, Tetsuya Sato
  • Patent number: 8783691
    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.
    Type: Grant
    Filed: August 30, 2010
    Date of Patent: July 22, 2014
    Assignee: Eagle Industry Co., Ltd.
    Inventor: Yoshihiro Suefuji
  • Patent number: 8770589
    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).
    Type: Grant
    Filed: June 25, 2012
    Date of Patent: July 8, 2014
    Assignees: Nippon Pillar Packaging Co., Ltd., Hitachi, Ltd.
    Inventors: Taiji Hashimoto, Tao Hu, Eiji Okumachi, Masanobu Ninomiya
  • Patent number: 8740224
    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.
    Type: Grant
    Filed: February 28, 2012
    Date of Patent: June 3, 2014
    Assignee: General Electric Company
    Inventors: Xiaoqing Zheng, Nathaniel Carmello Glinbizzi, Rodrigo Rodriguez Erdmenger, Norman Arnold Turnquist
  • Patent number: 8714559
    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.
    Type: Grant
    Filed: September 4, 2008
    Date of Patent: May 6, 2014
    Assignee: Setco Sales Company
    Inventor: Stephen C. Hoeting