Hydrodynamic Feature Patents (Class 277/400)
  • Patent number: 10989249
    Abstract: A sliding component is provided. At least one sliding face of sliding faces sliding relatively to each other of a pair of sliding parts of annular shapes is provided with positive pressure generation mechanisms with positive pressure generation grooves and negative pressure generation mechanisms with negative pressure generation grooves. The positive pressure generation grooves and the negative pressure generation grooves are separated from the opposite-to-sealed-fluid side by a land. Deep grooves deeper than the groove depth of the positive pressure generation grooves and the negative pressure generation grooves are located at least on the opposite-to-sealed-fluid side of the positive pressure generation grooves and the negative pressure generation grooves. The deep grooves are provided in such a manner as to communicate at least with the sealed fluid side.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: April 27, 2021
    Inventors: Yuta Negishi, Hideyuki Inoue, Takeshi Hosoe, Yuichiro Tokunaga
  • Patent number: 10948014
    Abstract: An intershaft seal assembly for maintaining separation between a piston ring and a pair of mating rings is presented. The assembly includes a piston ring interposed between forward and aft mating rings and a plurality of hydrodynamic grooves disposed along a sealing face of each mating ring. Each hydrodynamic groove further includes at least two adjoining steps wherein each step is defined by a base wall arranged to decrease depthwise in the direction opposite to rotation of an inner shaft. Two adjoining base walls define a base shoulder which locally redirects potion of a longitudinal flow within the groove to form an outward flow in the direction of the piston ring. Base walls are bounded by and intersect a pair of side walls with at least one side shoulder thereon which narrows the groove widthwise and locally redirects portion of the longitudinal flow to form a lateral flow from one side wall toward another side wall.
    Type: Grant
    Filed: October 23, 2018
    Date of Patent: March 16, 2021
    Assignee: Stein Seal Company
    Inventor: Glenn M. Garrison
  • Patent number: 10941863
    Abstract: A sliding component includes a pair of sliding parts of which a rotating-side sliding part rotates in both forward and reverse directions. In the sliding component, at least one of the sliding parts has a sliding face provided with positive pressure generation grooves on the sealed fluid side, and a negative pressure generation groove on the opposite-to-sealed-fluid side and separated from the opposite-to-sealed-fluid side by a land, and a deep groove communicating with the sealed fluid side on the sealed fluid side of the negative pressure generation groove. The positive pressure generation grooves each have an upstream end communicating with the deep groove, and the negative pressure generation groove has an upstream inlet and a downstream outlet that communicate with the deep groove, and an intermediate portion between the inlet and the outlet located on the opposite-to-sealed-fluid side of the inlet and the outlet.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: March 9, 2021
    Inventors: Yuta Negishi, Sayaka Kosugi, Hideyuki Inoue, Takeshi Hosoe, Yuichiro Tokunaga
  • Patent number: 10859164
    Abstract: A double mechanical seal includes a primary stationary seal ring, a primary rotary seal ring, a secondary stationary seal ring and a secondary rotary seal ring. The primary stationary seal ring includes a slide ring and a primary carrier ring, the primary carrier ring having a first axial end with a seat for the slide ring and a second axial end with a rim opposite the first axial end. The secondary stationary seal ring includes a slide ring and a secondary carrier ring, the secondary carrier ring having an inlet recess or opening and an outlet recess or opening for a barrier fluid. The primary carrier ring has a recessed and oblong section or an oblong opening, and the inlet and outlet recesses or openings in the secondary carrier ring are arranged, when in use, in radial flow communication with the recessed and oblong section or the oblong opening.
    Type: Grant
    Filed: May 8, 2017
    Date of Patent: December 8, 2020
    Assignee: SULZER MANAGEMENT AG
    Inventor: Jukka Vainikainen
  • Patent number: 10808752
    Abstract: In an exemplary embodiment, a sliding member includes sliding faces S configured to slide in relation to one another, at least one sliding face 5 of the sliding faces being provided with a plurality of dimples 11 having multi-sided shapes whose edges are formed without interruption. A pair of the edges A1-B1, A1-C1 of each of the multi-sided dimples 11, extending radially on opposite sides of a radial axis R of the sliding member, are sloped to become farther apart as they extend toward a high-pressure fluid side, and an edge B1-C1, which connects end points B1, C1 on the high-pressure fluid side of the pair of the edges, is formed such that its length is not greater than the lengths of the pair of the edges A1-B1, A1-C1. The sliding member can reduce friction between the sliding faces and improve sealing performance regardless of the direction of rotation.
    Type: Grant
    Filed: November 16, 2017
    Date of Patent: October 20, 2020
    Assignee: EAGLE INDUSTRY CO., LTD
    Inventor: Masatoshi Itadani
  • Patent number: 10753478
    Abstract: A bearing isolator having a simple design and made from low-cost materials but which performs comparably to other higher-cost bearing isolators is described. The bearing isolator generally includes a rotor having a snap fit feature protruding from a radially-oriented flange and a stator having a snap fit feature recess for receiving the snap fit feature to thereby join together the stator and rotor without need for, e.g., a separate unitizing element. Furthermore, the rotor and/or stator can be made from lost cost material, such as a nylon/moly material. In some embodiments, the stator further includes a lip seal biased against the radially-oriented flange of the rotor, which, when combined with the labyrinth passage formed at least in part by the snap fit feature and snap fit feature recess, helps to prevent egress and ingress of lubricant and/or contaminates.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: August 25, 2020
    Assignee: Garlock Sealing Technologies, LLC
    Inventors: Christopher Tones, Christopher Fink
  • Patent number: 10704417
    Abstract: Both conflicting functions of sealing and lubrication of sliding faces are made compatible over an entire period from the time of startup through the time of steady operation. A pair of sliding parts that relatively slide on each other is provided, one of the sliding parts being a stationary-side seal ring, the other of the sliding parts being a rotating-side seal ring, the seal rings each having a sliding face S formed radially for sealing sealed fluid from leaking, at least one of the sliding faces S being provided with fluid introduction grooves 10 configured to communicate with a first peripheral edge of the sliding face S and not to communicate with a second peripheral edge, and being provided with dynamic pressure generation grooves configured to communicate with the second peripheral edge of the sliding face S and not to communicate with the first peripheral edge.
    Type: Grant
    Filed: April 13, 2016
    Date of Patent: July 7, 2020
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Yuichiro Tokunaga, Keiichi Chiba, Masatoshi Itadani, Hikaru Katori, Wataru Kimura
  • Patent number: 10697547
    Abstract: The present invention provides a shaft sealing device for being mounted on a rotating shaft. The shaft sealing device of the present invention includes a stationary member disposed on a housing of the shaft sealing device and having a first sealing surface; and a rotary member corresponding to the stationary member, disposed on the rotating shaft and having a second sealing surface opposite to the first sealing surface of the stationary member. A groove is disposed on the first sealing surface or the second sealing surface, and extends inwardly from the outer peripheral edge. When the groove extends inwardly, an end (a bottom wall) of the groove extends along a tangential direction of an imaginary circle containing the bottom wall of the groove.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: June 30, 2020
    Assignee: SCENIC PRECISE ELEMENT INC.
    Inventors: Cheng-Hsiu Huang, Tzu-Hsing Chen
  • Patent number: 10670151
    Abstract: A segmented seal and segmented seal assembly (10) are disclosed. An embodiment of a radial seal assembly includes a plurality of seal segments (12) that may interconnect to form a seal ring, each seal segment having a male joint end (20) and a female joint end (30). A male joint end of one seal segment may be configured to interconnect with a female joint end of an adjacent seal segment to provide a joint interface (50). In embodiments, the male joint end may include a shallow groove or pad (40) on an inner diameter of the male joint end, and the male joint end and the female joint end may be configured to provide a seal at the joint interface. With embodiments, the female joint end may include a deep groove or pad (60) on an inner diameter of the female joint end and/or may include a vent hole (70) that is isolated from the shallow groove.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: June 2, 2020
    Assignee: Eaton Intelligent Power Limited
    Inventors: Edward N. Ruggeri, Drew Bangs, Gerry Berard
  • Patent number: 10648507
    Abstract: A circumferential seal assembly capable of separating a gas into two separate flow paths before communication between a rotatable runner and a pair of seal rings is presented. The seal assembly includes an annular seal housing, a pair of annular seal rings, a rotatable runner, and a plurality of groove structures. The seal housing is interposed between a pair of compartments. The seal rings are separately disposed within the seal housing and separately disposed around the rotatable runner. The groove structures are disposed along an outer annular surface of the rotatable runner. A gas is communicable onto the groove structures. Each groove structure includes at least two hydrodynamic grooves that separate and communicate the gas onto the seal rings. Each groove includes steps whereby the depth of at least one adjoining step decreases in the direction opposite to rotation with or without the depth of another adjoining steps increasing in the direction opposite to rotation.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: May 12, 2020
    Assignee: Stein Seal Company
    Inventor: Glenn M. Garrison
  • Patent number: 10648569
    Abstract: Provided is a sliding component having sealing face of one of a pair of sliding parts that slide relative to each other provided with a first pumping groove that is open to the high-pressure fluid side but isolated from the low-pressure fluid side by a seal area and also angled to discharge the fluid toward the high-pressure fluid side by sliding relative to the mating sealing face, as well as a second pumping groove that is open to the low-pressure fluid side but isolated from the high-pressure fluid side by a seal area and also angled to discharge the fluid toward the high-pressure fluid side by sliding relative to the mating sealing face, wherein the low-pressure fluid-side end of the first pumping groove is arranged adjacent to the high-pressure fluid-side end of the second pumping groove.
    Type: Grant
    Filed: April 2, 2018
    Date of Patent: May 12, 2020
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventor: Masatoshi Itadani
  • Patent number: 10495228
    Abstract: In an embodiment, a pair of sliding components that slide relative to each other is included. One of the sliding components is a stationary-side seal ring 2, and the other sliding component is a rotating-side seal ring 3. The seal rings 2 and 3 have sliding faces S2 and S3 extending radially, respectively, for sealing sealed fluid against leakage. The sliding faces S2 and S3 are provided with a static pressure groove 22 communicating with a sealing gas supply passage, and pumping grooves 5 capable of controlling the radial flow of sealing gas to a flow from the low-pressure fluid side to the high-pressure fluid side by relative sliding of the sliding faces. By controlling the radial flow of sealing gas at the sliding face, the amount of flow of the sealing gas flowing to the low-pressure fluid side is reduced to improve sealing performance.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: December 3, 2019
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Masatoshi Itadani, Keiichi Chiba, Hideyuki Inoue, Yuichiro Tokunaga, Kenji Kiryu
  • Patent number: 10473110
    Abstract: A centrifugal compressor including: a impeller; a wall portion having an opposed surface that is spaced apart from and opposed to a back surface of the impeller; an insertion hole, which is formed in the wall portion, and is configured to receive a shaft inserted into the insertion hole; a bearing, which is provided in the insertion hole or apart from the impeller with respect to the insertion hole, and is configured to axially support the shaft through interposition of grease being a lubricant inside; an electric motor which is provided on a side opposite to the impeller over the wall portion; and an opposed hole, which is formed in the wall portion, is disclosed. The opposed hole has one end opened in the opposed surface and another end opened at a position opposed to a stator of the electric motor on a side opposite to the impeller.
    Type: Grant
    Filed: March 27, 2018
    Date of Patent: November 12, 2019
    Assignee: IHI Corporation
    Inventors: Kuniaki Iizuka, Takashi Yoshida, Tatsumi Inomata, Takuya Ozasa, Kouta Kimachi
  • Patent number: 10428948
    Abstract: A seal ring (100) is attached to an annular groove (210) provided on an outer periphery of a shaft (200), and slides on a lateral wall surface (211) of the annular groove (210) on a lower pressure side. The seal ring (100) includes: a dynamic pressure generation groove (120) that generates dynamic pressure with sealed fluid introduced thereinto, the dynamic pressure generation groove (120) being provided in a sliding region X of a lateral surface (111) thereof on the lower pressure side in which the lateral surface (111) slides on the lateral wall surface (211); and an introduction hole (130) that has an opening (131) at a position away from the lateral surface (111) of an inner peripheral surface (112) of the seal ring (100) by a distance Y, communicates with the dynamic pressure generation groove (120), and introduces the sealed fluid into the dynamic pressure generation groove (120).
    Type: Grant
    Filed: March 11, 2016
    Date of Patent: October 1, 2019
    Assignee: NOK CORPORATION
    Inventors: Norimasa Hosonuma, Nozomu Suzuki
  • Patent number: 10408349
    Abstract: A seal ring includes, on a side of a sliding surface thereof, a groove part (120) having a first groove (121) extending in a circumferential direction thereof and a second groove (122) extending from a central position of the first groove (121) in the circumferential direction to an inner peripheral surface and guiding sealed fluid into the first groove (121), the first groove (121) having dynamic pressure generation grooves (121a) configured to have a groove bottom made shallower at an end thereof in the circumferential direction than at a center thereof in the circumferential direction, and a foreign matter catching groove (121b) that has a groove bottom deeper than the groove bottoms of the dynamic pressure generation grooves (121a) and is capable of catching foreign matter, and the first groove (121) being provided at a position that falls within a sliding region in which the seal ring slides on the lateral wall surface.
    Type: Grant
    Filed: March 11, 2016
    Date of Patent: September 10, 2019
    Assignee: NOK CORPORATION
    Inventors: Maiko Miyazaki, Yohei Sakai, Kenichi Yoshimura, Shota Toma
  • Patent number: 10364695
    Abstract: An active clearance control system for a gas turbine engine includes a ring seal engageable with a multiple of air seal segments.
    Type: Grant
    Filed: February 6, 2014
    Date of Patent: July 30, 2019
    Assignee: United Technologies Corporation
    Inventor: Brian Duguay
  • Patent number: 10337620
    Abstract: In an embodiment, a sliding component includes a pair of sliding parts (a stationary-side seal ring 7 and a rotating-side seal ring 4) that relatively slide on each other and each have a sliding face S formed radially for sealing sealed fluid from leaking. The sliding face S of at least one sliding part is provided with dynamic pressure generation grooves 10 spaced in a non-communicating manner from the sealed-fluid side and the leakage side by lands R of both sliding faces, and is provided with fluid introduction holes 11 between leakage-side ends 10a of the grooves 10 and the leakage side, for communicating the grooves 10 and the leakage side. Each fluid introduction holes 11 is configured such that a dynamic-pressure-generation-groove-side opening 11a open to a corresponding one of the grooves 10 is axially displaced from a leakage-side opening 11b open to the leakage side.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: July 2, 2019
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Yuichiro Tokunaga, Hideyuki Inoue, Wataru Kimura, Tetsuya Iguchi, Keiichi Chiba, Masatoshi Itadani, Hikaru Katori
  • Patent number: 10302200
    Abstract: A hydrodynamically lubricating rotary seal for differential pressure acting in either axial direction that establishes compressed sealing engagement with a relatively rotatable surface and wedges a film of lubricating fluid into the interface between the rotary seal and the relatively rotatable surface in response to relative rotation that may occur in the clockwise or counter-clockwise direction. A multi-function edge and angled flank of the hydrodynamic wave form are truncated by the lubricant end of the seal, improving the dynamic performance of the seal in circumstances where the pressure acting on the environment end of the seal is greater than the pressure acting on the lubricant end of the seal. This improvement is believed to be the result of reduced contact pressure, and reduced radial deformation of the wave form, compared to prior art seals.
    Type: Grant
    Filed: May 10, 2018
    Date of Patent: May 28, 2019
    Assignee: Kalsi Engineering, Inc.
    Inventor: Lannie L. Dietle
  • Patent number: 10274087
    Abstract: A mechanical seal designed for gas applications minimizes leakage even when the pressure differential changes direction, such as during rapid deceleration of a turbocharger. The seal faces include both inner (ID) and outer (OD) diameter recessed features configured to admit gas between the faces from the inner and outer face diameters respectively. In embodiments, the ID features hydro-dynamically provide a pressurized gas cushion between the seal faces under normal conditions, and the OD features provide a cushion when the pressure differential is reversed. According to the embodiment, the ID and OD features can be provided in only one seal face, or distributed among both seal faces. For example, one seal face can include the ID features and the other the OD features. The ratio of the area covered by the ID and OD features, divided by the total seal face area, can be at least 0.75 or greater.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: April 30, 2019
    Assignee: Flowserve Management Company
    Inventor: Lionel A Young
  • Patent number: 10274086
    Abstract: Provided is a slide component that can prevent deposit formation on a sealing face as well as promoting circulation of a fluid on sealing faces while fulfilling both conflicting conditions of sealing and lubrication, to maintain the sealing function of the sealing faces for a long period of time. The slide component includes a pair of slide parts that relatively slide on each other, one of the slide parts being provided in a sealing face with fluid circulation grooves 10 that communicate with a high-pressure fluid side via an inlet portion and an outlet portion and are separated from a low-pressure fluid side by a land portion, the other of the slide parts being provided in a sealing face with interference grooves 15 that communicate with the high-pressure fluid side and produce pressure variations in a fluid in the fluid circulation grooves 10.
    Type: Grant
    Filed: August 26, 2015
    Date of Patent: April 30, 2019
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Masatoshi Itadani, Kazumasa Sunagawa, Yuichiro Tokunaga, Hideyuki Inoue, Takeshi Hosoe, Ryoma Yamakawa, Yuta Negishi, Kenji Kiryu, Keiichi Chiba, Akira Yoshino, Hiroshi Kubota
  • Patent number: 10267421
    Abstract: A seal ring includes a center axis, an outer peripheral surface, an inner peripheral surface, a side surface, and a groove. The center axis is a rotation center. The outer peripheral surface is an outward cylindrical surface whose center is positioned at the central axis. The inner peripheral surface is an inward cylindrical surface disposed between the center axis and the outer peripheral surface whose center is positioned at the central axis. The side surface connects the outer peripheral surface and the inner peripheral surface. The groove is formed in a dented groove from the side surface, extends along a radial direction spaced from the outer peripheral surface, has a first end connected to the inner peripheral surface and a second end at an opposite side of the first end, and returns oil entered from the first end to an inner peripheral surface side via the second end.
    Type: Grant
    Filed: September 17, 2014
    Date of Patent: April 23, 2019
    Assignee: KABUSHIKI KAISHA RIKEN
    Inventors: Naohisa Ohya, Junya Nagai
  • Patent number: 10221761
    Abstract: An assembly for a gas turbine engine includes a minidisk that includes an axial extension extending from a disc. The axial extension includes an inner diameter surface and a recess arranged radially opposite the inner diameter surface. The recess provides a radially outwardly extending flange and a bumper extending radially inward from and proud of the inner diameter surface. A method of working on a gas turbine engine section includes inserting a tool into a cavity beneath a seal assembly, and engaging a flange of a minidisk with the tool to manipulate first and second rotors with respect to one another.
    Type: Grant
    Filed: April 7, 2014
    Date of Patent: March 5, 2019
    Assignee: UNITED TECHNOLOGIES CORPORATION
    Inventor: Jonathan Perry Sandoval
  • Patent number: 10190431
    Abstract: A seal assembly for a rotary machine is provided. The seal assembly includes a plurality of seal segments disposed circumferentially intermediate to a stationary housing and a rotor, where each of the plurality of seal segments includes a stator interface element and a shoe plate movably supported by the stator interface element. The shoe plate includes one or more labyrinth teeth, a load-bearing surface, and one or more supply ports for facilitating supply of high pressure fluid toward the rotor. In one embodiment, the shoe plate also includes a radially extending portion that is in contact with a portion of the ring movably supported into the stator interface element. In another embodiment, each of the plurality of seal segments includes a plurality of overlapping spring-loaded leaf seal plates in contact with the stator interface element and the radially extending portion. Method of operating the seal segment is also disclosed.
    Type: Grant
    Filed: February 11, 2015
    Date of Patent: January 29, 2019
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Rahul Anil Bidkar, Christopher Edward Wolfe, Bugra Han Ertas, Adolfo Delgado Marquez, Nathan Evan McCurdy Gibson
  • Patent number: 10190689
    Abstract: A seal ring capable of stably reducing a rotational torque while preventing the leakage of sealed fluid. The seal ring includes: an abutment joint part (110) provided at one portion in a circumferential direction thereof; a plurality of dynamic pressure generation grooves (120) provided at intervals in the circumferential direction on a side of a sliding surface thereof sliding on a lateral wall surface of an annular groove; and foreign matter discharging grooves (130) that are provided between a region in which the plurality of dynamic pressure generation grooves (120) is arranged and the abutment joint part (110) in the circumferential direction on the side of the sliding surface sliding on the lateral wall surface, and that are capable of catching foreign matter intruding from the abutment joint part (110) and discharging the caught foreign matter to an outside of a sliding part between the seal ring and the lateral wall surface.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: January 29, 2019
    Assignee: NOK CORPORATION
    Inventors: Yusuke Yoshida, Fangman Xu, Nozomu Suzuki, Norimasa Hosonuma, Shigenobu Honda, Kenichi Yoshimura, Yohei Sakai, Shota Toma
  • Patent number: 10054230
    Abstract: Provided is a mechanical seal includes a fluid introduction groove provided in a sealing face of a stationary sealing ring and having an opening portion which is opened to the sealed fluid and an end portion which is provided opposite to the opening portion. The end portion being located between respective sealing faces S, the fluid introduction groove introducing the sealed fluid from the opening portion to a clearance between the respective sealing faces S. The fluid introduction groove is provided to be inclined at an acute angle to the sealing face S of the stationary sealing ring in a direction from the end portion to the opening portion.
    Type: Grant
    Filed: September 3, 2015
    Date of Patent: August 21, 2018
    Assignee: EAGLES INDUSTRY CO., LTD.
    Inventors: Hikaru Katori, Keiichi Chiba, Masatoshi Itadani
  • Patent number: 10036474
    Abstract: A seal assembly includes a first sealing ring defining a plurality of circumferentially spaced depressions configured to form a lift off seal with the first sealing ring rotating and to prevent leakage radially with the first sealing ring at rest. At least one ventilation channel extends from a respective edge of one of the depressions to an edge of the first sealing ring and is configured to relieve pressure with the first sealing ring at rest. The first sealing ring can have an inner diameter and an outer diameter such that the plurality of depressions are defined between the inner and outer diameters.
    Type: Grant
    Filed: September 23, 2015
    Date of Patent: July 31, 2018
    Assignee: Hamilton Sundstrand Corporation
    Inventor: David S. Behling
  • Patent number: 10030666
    Abstract: The use of externally-pressurized porous media in shaft sealing for turbomachinery is provided for single seals, tandem seals, double-opposed seals, and a ventless seal. These arrangements provide for significant benefits, such as the following: (a) external pressurization allows frozen seal faces to lift open before rotation, (b) pressure is distributed uniformly across the seal face, as opposed to allowing leakage to pass over it, (c) low flow rates of injected gas are possible, (d) the seal faces are self-defending due to the uniform pressure in the gap, and (e) complete elimination of venting process gas is possible. By employing externally-pressurized porous media sealing, a drastic simplification of seal design, as well as gas treatment and seal panel design, is possible.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: July 24, 2018
    Assignee: NEW WAY MACHINE COMPONENTS, INC.
    Inventor: Andrew J. Devitt
  • Patent number: 9989153
    Abstract: A sealing ring for a seal assembly is described that comprises: a main body rotating about an axis; and a first surface, which is defined by the main body, extends transversely to the axis and is suitable for abutting against a further sealing ring in a direction parallel to the axis; the first surface comprises a plurality of grooves forming respective hydropads; the grooves are delimited by a first edge and a second edge facing one another; the first edge and the second edge delimit the grooves in a circumferential direction to said axis; at least one of the first edge and the second edge is shaped like an elliptical arc, which has coincident or separate foci; comprises first grooves and second grooves alternating with one another in a circumferential direction to said axis and staggered from each other in a radial direction to said axis.
    Type: Grant
    Filed: July 17, 2015
    Date of Patent: June 5, 2018
    Assignee: LEONARDO S.p.A.
    Inventors: Dario Colombo, Giuseppe Gasparini, Paolo Pisani
  • Patent number: 9982784
    Abstract: A mechanical seal has a structure wherein a plurality of sealed-fluid-accommodating blocks separated in the circumferential direction are formed on either the sealing face of a fixed ring or the sealing face of a rotating ring so as to communicate with a sealed fluid accommodation space. Pumping parts for creating a pumping action due to the fixed ring and the rotating ring sliding while undergoing relative rotation are formed on a bottom part of the plurality of sealed-fluid-accommodating blocks. The pumping parts formed on the bottom parts of the plurality of sealed-fluid-accommodating blocks are provided with an intake pumping part which acts in a direction in which the sealed fluid is drawn in and a discharge pumping part which acts in a direction in which the sealed fluid is discharged.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: May 29, 2018
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Haruhiro Osada, Hideyuki Inoue, Takeshi Hosoe, Daisuke Morimiya, Yuichiro Tokunaga, Yuta Negishi
  • Patent number: 9970482
    Abstract: A circumferential seal assembly capable of separating a gas into two separate flow paths before communication between a rotatable runner and a pair of seal rings is presented. The seal assembly includes an annular seal housing, a pair of annular seal rings, a rotatable runner, and a plurality of groove structures. The seal housing is interposed between a pair of compartments. The seal rings are separately disposed within the seal housing and separately disposed around the rotatable runner. The groove structures are disposed along an outer annular surface of the rotatable runner. A gas is communicable onto the groove structures. Each groove structure includes at least two hydrodynamic grooves that separate and communicate the gas onto the seal rings. Each groove includes steps whereby the depth of at least one adjoining step decreases in the direction opposite to rotation with or without the depth of another adjoining steps increasing in the direction opposite to rotation.
    Type: Grant
    Filed: September 4, 2015
    Date of Patent: May 15, 2018
    Assignee: Stein Seal Company
    Inventor: Glenn M. Garrison
  • Patent number: 9964216
    Abstract: A sliding component is characterized in that, on one sealing face of a pair of sliding parts that slide relative to each other, multiple positive pressure-generating mechanisms that include extremely shallow parallel grooves running roughly in parallel with the sealing face and having a submicron-level height difference are provided independently in the circumferential direction, and that the extremely shallow parallel grooves connect to the high-pressure fluid side, but are isolated from the low-pressure fluid side by a seal area. The sliding component can reduce a leakage rate of sealed fluid and significantly improve lubrication characteristics at startup or stop, while being actuated by means of fluid lubrication in a rotation phase, thereby achieving the effects of sealing and lubrication at the same time.
    Type: Grant
    Filed: May 15, 2013
    Date of Patent: May 8, 2018
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Hideyuki Inoue, Takeshi Hosoe, Yuta Negishi
  • Patent number: 9958010
    Abstract: A sliding component, which can seal and lubricate at the same time by reducing the amount of leakage of sealed fluid further while preventing torque increase and local wear, is characterized in that an extremely shallow step of circular shape is provided on a sealing face of one of a pair of sliding parts that slide against each other in such a way that the step is positioned on the low-pressure fluid side (atmosphere side) of this sealing face and also set lower than the sealing face, and that pumping grooves acting to push back toward the high-pressure fluid side (sealed fluid side) the fluid that tends to leak from the sealing face toward the low-pressure fluid side (atmosphere side) are provided on the surface of the extremely shallow step.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: May 1, 2018
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventor: Masatoshi Itadani
  • Patent number: 9915175
    Abstract: A system is provided associated with an engine of an aircraft. The system includes a ring, a runner and at least one radially-oriented hole associated with the runner that is configured to supply oil to an interface between the runner and the ring. The at least one hole is contained within an axial projection of the ring.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: March 13, 2018
    Assignee: United Technologies Corporation
    Inventors: Jonathan L. Miller, M Rifat Ullah
  • Patent number: 9850953
    Abstract: A positive pressure generating mechanism comprising a positive pressure generating groove is provided to a high-pressure side of one of two sliding surfaces that slide relative to each other in a pair of sliding components, and a negative pressure generating mechanism comprising a negative pressure generating groove is provided to a low-pressure side. The positive pressure generating groove and negative pressure generating groove are communicated with a high-pressure fluid side and separated from a low-pressure fluid side by a seal surface.
    Type: Grant
    Filed: September 9, 2016
    Date of Patent: December 26, 2017
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventor: Yuichiro Tokunaga
  • Patent number: 9791047
    Abstract: An assembly comprises a shaft, and a support structure surrounding the shaft; and a magnetic seal system comprising an annular seal assembly including a ring sealingly mounted to a shaft to rotate therewith and slidingly axially displaceable along the shaft, and an annular seal supported by the ring. An annular magnet assembly is configured to be non-rotatingly supported adjacent to and surrounding the shaft, the annular magnet assembly configured and positioned relative to the ring to exert a sufficient attracting force on the ring to biasingly displace the ring axially along the shaft into sealing contact with the magnet. A cooling fluid feeding conduit, a cooling fluid exhaust conduit distinct from the cooling fluid feeding conduit are provided.
    Type: Grant
    Filed: January 25, 2016
    Date of Patent: October 17, 2017
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventor: Julien De La Bruere Terreault
  • Patent number: 9784372
    Abstract: Provided is a sealing device that increases the lubricity of seal surfaces, prevents leakage of sealed fluids, and prevents excessive heat generation and excessive friction at seal surfaces. Said sealing device, which is of the type that seals a fluid trying to leak from the outer periphery of a sealing surface towards the inner periphery thereof, forms at least two dimples in a circumferential direction in each of a plurality of rows arranged in a radial direction on a sealing surface of a stationary-side sealing element or a rotating-side sealing element. Each dimple is tilted by a dimple angle ? between 0° and 90°, exclusive, such that the tip of that dimple in the direction of rotation is tilted toward the inner periphery side. In each of the plurality of rows of dimples, land areas are formed in the circumferential direction between the proximate tips of adjacent dimples.
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: October 10, 2017
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Tetsuya Iguchi, Kazuhiro Iwashita, Yasuhiro Kuroki
  • Patent number: 9772037
    Abstract: A sliding component, which achieves both sealing and lubrication by preventing cavitation from occurring in the dynamic-pressure generation mechanism and thereby solving the problem of leakage that will otherwise result from such cavitation, is characterized in that, on a sealing face of one of a pair of sliding parts that slide against each other, extremely shallow grooves constituting a Rayleigh step mechanism are provided in a manner facing the high-pressure fluid side of the sealing face, while deep fluid-introduction grooves for introducing the high-pressure fluid are provided on the upstream side of the extremely shallow grooves in a manner continuing to the high-pressure fluid side.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: September 26, 2017
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Masatoshi Itadani, Yuichiro Tokunaga
  • Patent number: 9732622
    Abstract: A turbine of a gas turbine engine has an air riding seal that forms a seal between a rotor and a stator of the turbine, the air riding seal including an annular piston movable in an axial direction under the influence of a pressure on one side with a pressure acting on an opposite side that self-balances the air riding seal during the steady state condition of the engine and lifts off the seal during engine transients.
    Type: Grant
    Filed: June 16, 2015
    Date of Patent: August 15, 2017
    Assignee: Florida Turbine Technologies, Inc.
    Inventor: Jacob A Mills
  • Patent number: 9732621
    Abstract: An air riding seal for a turbine in a gas turbine engine, where an annular piston is axial moveable within an annular piston chamber formed in a stator of the turbine and forms a seal with a surface on the rotor using pressurized air that forms a cushion in a pocket of the annular piston. A purge cavity is formed on the annular piston and is connected to a purge hole that extends through the annular piston to a lower pressure region around the annular piston or through the rotor to an opposite side. The annular piston is sealed also with inner and outer seals that can be a labyrinth seal to form an additional seal than the cushion of air in the pocket to prevent the face of the air riding seal from overheating.
    Type: Grant
    Filed: November 20, 2014
    Date of Patent: August 15, 2017
    Assignee: Florida Turbine Technologies, Inc.
    Inventors: Thomas D Sexton, Jacob A Mills
  • Patent number: 9726031
    Abstract: A seal assembly for separating a relatively high pressure area from a relatively low pressure area includes a first seal carrier having a circumferential body that has a land thereon and a seal. The seal has a circumferential body located within the first seal carrier, the seal having a first surface for sealing against the first land and a second surface and wherein one of the first surface or the first land has an unmachined wear coating that resists fretting and vibration.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: August 8, 2017
    Assignee: UNITED TECHNOLOGIES CORPORATION
    Inventors: Maria Cusack, Arnold Zandonella
  • Patent number: 9657842
    Abstract: A shaft seal arrangement with a shaft extending along an axis and with a stator, wherein a rotating sealing ring is arranged on the shaft and a static sealing ring is arranged on the stator, wherein the rotating sealing ring has a rotating sealing surface and the stationary sealing ring has a stationary sealing surface, wherein these sealing surfaces are arranged in such a way that they are located opposite one another in a sealing manner in a substantially radial sealing plane, wherein the shaft seal arrangement forms a contactless gas seal, wherein at least one of the sealing surfaces has a nonrotationally symmetrical surface contouring the rotating sealing ring is provided.
    Type: Grant
    Filed: July 25, 2013
    Date of Patent: May 23, 2017
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Christian Kirchner
  • Patent number: 9611749
    Abstract: Embodiments of the present disclosure are directed toward a stator ring configured to be disposed about a rotor of a turbine, wherein the stator ring comprises a plurality of hydrodynamic pads extending from a sealing face of the stator ring, wherein each of the plurality of hydrodynamic pads is configured to hydrodynamically engage with a rotor ring.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: April 4, 2017
    Assignee: General Electric Company
    Inventors: Azam Mihir Thatte, Rahul Anil Bidkar, Xiaoqing Zheng
  • Patent number: 9611938
    Abstract: Even when a fluid discharge for discharging high-pressure fluid (sealed fluid) to a high-pressure side of a sealing face is provided, the disclosed sliding component prevents precipitation, adhesion and accumulation of a deposition-causing substance through a dehydration condensation reaction between the high-pressure fluid and low-pressure fluid on the sealing face, and also prevents occurrence of cavitation which would otherwise take place in association with a sudden pressure drop due to a discharge of fluid. Disclosed is a pair of sliding components provided, on a high-pressure side of one of relatively sliding sealing faces thereof, with a fluid discharge for discharging fluid to a high-pressure fluid side, wherein a buffer groove for reducing penetration of low-pressure fluid toward the high-pressure fluid side is provided in the sealing face S on a low-pressure side of the fluid discharge.
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: April 4, 2017
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Masatoshi Itadani, Yuichiro Tokunaga, Kazumasa Sunagawa, Hikaru Katori
  • Patent number: 9581200
    Abstract: A fluid is actively taken into sealing faces and discharged from the sealing faces to prevent concentration of sediment causative substances on the sealing faces and prevent generation of sediment while preventing leakage of the fluid taken into the sealing faces to a low pressure fluid side. A fluid circulation groove includes an inlet side section where the fluid comes in from a high pressure fluid side and an outlet side section where the fluid goes out to the high pressure fluid side in one of sealing faces of a pair of sliding parts that slide on each other. The fluid circulation groove is isolated from the low pressure fluid side by a land section. Groove width of the outlet side section of the fluid circulation groove is gradually expended toward an outlet end.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: February 28, 2017
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Masatoshi Itadani, Kazumasa Sunagawa, Yuuichiro Tokunaga, Ryoma Yamakawa
  • Patent number: 9518473
    Abstract: A shaft seal insert for the shaft seal of a turbomachine extending along a rotational axis includes:—a rotor part attachable on a shaft of a rotor,—a stator part insertable into a stator receiving area, and—a dry gas seal having a rotating seal element attached to the rotor part and a fixed seal element attached to the stator part to seal an intermediate space between the two seal elements, which lie opposite each other on a sealing surface extending radially and in the circumferential direction. A labyrinth seal is provided on a high-pressure side in a serial arrangement with the dry gas seal to seal the intermediate space, having a fixed and rotating labyrinth seal parts. The fixed labyrinth seal part is part of the stator part or is fixed thereto. The rotating labyrinth seal part is part of the rotor part or is fixed thereto.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: December 13, 2016
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Gesinus Mateman
  • Patent number: 9482158
    Abstract: A turbomachine seal includes, among other things, a sealing member configured to be influenced by both hydrostatic and hydrodynamic forces when providing a seal.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: November 1, 2016
    Assignee: United Technologies Corporation
    Inventor: M. Rifat Ullah
  • Patent number: 9470267
    Abstract: A positive pressure generating mechanism comprising a positive pressure generating groove is provided to a high-pressure side of one of two sliding surfaces that slide relative to each other in a pair of sliding components, and a negative pressure generating mechanism comprising a negative pressure generating groove is provided to a low-pressure side. The positive pressure generating groove and negative pressure generating groove are communicated with a high-pressure fluid side and separated from a low-pressure fluid side by a seal surface.
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: October 18, 2016
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventor: Yuichiro Tokunaga
  • Patent number: 9371912
    Abstract: Sliding parts are provided where a plurality of dynamic pressure-generating grooves for generating dynamic pressure via the relative rotational sliding of the stationary ring and the rotating ring are formed in a circumferential direction on a sealing face of one of a stationary ring and the rotating ring so as to communicate with a sealed fluid-containing space, and pumping areas for generating pumping action via the relative rotational sliding of the stationary ring and the rotating ring are formed within the dynamic pressure-generating grooves.
    Type: Grant
    Filed: August 13, 2012
    Date of Patent: June 21, 2016
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventors: Takeshi Hosoe, Hideyuki Inoue
  • Patent number: 9347566
    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, and stripe-shaped projections with directionality are provided in a cavitation formation area in each dimple. The sliding component can prevent leakage regardless of the level of differential pressure between the inner periphery and outer periphery of the sealing face by controlling the streak-like flow of fluid due to cavitation that occurs in a dimple or other concaved part formed on the sealing face.
    Type: Grant
    Filed: October 10, 2013
    Date of Patent: May 24, 2016
    Assignee: EAGLE INDUSTRY CO., LTD.
    Inventor: Yuichiro Tokunaga
  • Patent number: 9334965
    Abstract: Provided is a gas seal assembly which includes: an inner sleeve in which a rotation axle is inserted; a rotational sealing sleeve inserted into the inner sleeve; a sealing sleeve contacting the rotational sealing sleeve; a forcing sleeve forcing the sealing sleeve towards the rotational sealing sleeve by contacting the sealing sleeve; a seal housing separated by a predetermined distance from the forcing sleeve and the sealing sleeve and supporting the forcing sleeve; and an elastic part mounted between the seal housing and the forcing sleeve and providing a restoring force to the forcing sleeve, wherein the seal housing protrudes in a center direction of the rotation axle and includes a supporting protrusion for supporting one end of the forcing sleeve.
    Type: Grant
    Filed: September 6, 2013
    Date of Patent: May 10, 2016
    Assignee: Hanwha Techwin Co., Ltd.
    Inventors: Jin-Hyoung Kim, Bong-Gun Shin