公开(公告)号：US12085171B2

公开(公告)日：2024-09-10

申请号：US17286175

申请日：2019-08-22

Applicant: NIPPON PILLAR PACKING CO., LTD.

Inventor： Masaru Fujiwara ,  Kodai Inoue

IPC: F16J15/20 ,  F16J15/18 ,  F16J15/24

CPC classification number: F16J15/182 ,  F16J15/20 ,  F16J15/24

Abstract: A gland packing includes a gland packing body made of expanded graphite. The gland packing body has a cylindrical shape, and has a plurality of layers formed in a radial direction. The gland packing body has first and second surfaces, which are both end surfaces in an axial direction. The gland packing further includes an annular first sheet portion made of expanded graphite, an annular second sheet portion made of expanded graphite, an annular first porous member, and an annular second porous member. The first sheet portion is arranged on the first surface. The second sheet portion is arranged on the second surface. The first porous member is arranged on the first sheet portion. The second porous member is arranged on the second sheet portion.

公开(公告)号：US11543053B2

公开(公告)日：2023-01-03

申请号：US16190184

申请日：2018-11-14

Applicant: BAOYI GROUP CO., LTD.

Inventor： Changxiang Xu ,  Xiaozhong Zhang

IPC: F16K41/04 ,  F16J15/16 ,  F16K5/06 ,  F16J15/18 ,  F16J15/24 ,  F16K41/02 ,  F16J15/20 ,  F16K41/06 ,  F16J15/3284

Abstract: A pressure-tight stem cylinder seal and a self-energizing stem shoulder seal matching the stem cylinder seal that both use an equilaterally triangular soft ring as their sealing element, wherein their designing rules are first, by means of wedging function of a hard gland coaxial with the stem cylinder, to convert their original axial tightening force 2f respectively into a radial compression force 4f/√3 of their soft ring 04 on the stem 02 cylinder and another radial compression force 2f of their soft ring 06 on the stem 02 shoulder and ensure that the two soft rings are so compressed from a great room to a small room as to be able to pass a pressure or stress exactly to each different direction, then to cut off their off-stem corners to give their cavities an opening or give each soft ring an axial compressing allowance, and last, by means of anti-extrusion metallic C-rings without axial resistance, to close each opening to provide a full support for the sealing deformation of their soft rings compressed in their cavities.

公开(公告)号：US20220025777A1

公开(公告)日：2022-01-27

申请号：US17495084

申请日：2021-10-06

Applicant: Stein Seal Company

Inventor： Glenn M. Garrison

IPC: F01D11/00 ,  F16J15/24 ,  F16J15/44

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 segmented primary sealing ring sealingly engages both a face sealing surface along a housing and a radial sealing surface along a rotatable element. The insert is disposed within and directly contacts the housing. The second sealing ring is adjacent to the primary sealing ring and sealingly engages both the primary sealing ring and the insert. The segmented third sealing ring contacts and sealingly engages the primary sealing ring opposite the housing. The insert, the second sealing ring, and the third sealing ring cooperate to form a first cavity adjacent to the second sealing ring and the third sealing ring. The primary sealing ring, the second sealing ring, the insert, and the housing cooperate to form a second cavity adjacent to the primary sealing ring. The insert and the second sealing ring separate the first cavity from the second cavity.

公开(公告)号：US11162591B2

公开(公告)日：2021-11-02

申请号：US15066069

申请日：2016-03-10

Applicant: General Electric Company

Inventor： Matthew Robert Martin ,  James Jonathan Grant ,  Anthony James George ,  Eric Steven Buskirk ,  Daniel James Fitzmorris

IPC: F16J15/34 ,  F16J15/44 ,  F16J15/24 ,  H02K5/124

Abstract: A seal ring assembly for a rotor shaft includes a seal casing defining a radially inwardly directed channel. The seal ring is disposed in the radially inwardly directed channel of the seal casing. The seal ring is resiliently joined about the shaft to form a seal, and the seal ring comprises an electrically insulating or dissipative material or a non-metallic material.

公开(公告)号：US11136829B2

公开(公告)日：2021-10-05

申请号：US16349469

申请日：2018-06-19

Applicant: Halliburton Energy Services, Inc.

Inventor： Brian Lee Doud ,  Neelesh Deolalikar ,  Wei Zhang

IPC: F16J15/28 ,  F16J15/24 ,  E21B7/06

Abstract: Rotary steerable drilling systems are subjected to harsh environments including high temperature and pressure. A metallic seal ring prevents or limits erosive wear by limiting the velocity of the fluid that traversers from the high pressure side of the metallic seal ring to the low pressure side of the metallic seal ring to a value that can be sustained by the material of the metallic seal ring. A metallic seal ring is capable of withstand the wear and tear of drilling mud or other fluids used for downhole drilling operations. A metallic seal ring includes a mating configuration that creates a seal as the metallic seal ring is contracted when or a tension is applied when disposed or positioned in the piston bore. The metallic seal ring maintains an adequate seal to protect the components of a pad assembly over the life or specified duration of a downhole drilling operation.

公开(公告)号：US11085539B2

公开(公告)日：2021-08-10

申请号：US16488097

申请日：2018-02-16

Applicant: EAGLE INDUSTRY CO., LTD.

Inventor： Yuichiro Tokunaga ,  Hideyuki Inoue ,  Wataru Kimura ,  Tetsuya Iguchi ,  Hidetoshi Kasahara ,  Jun Hiromatsu ,  Yasuhiro Kuroki ,  Ryu Kikuchi

IPC: F16J15/30 ,  F16J15/34 ,  F01D11/00 ,  F16J15/24 ,  F16J15/44

Abstract: A sealing device includes a floating ring in a space between the outer circumference of a rotating shaft and the inner circumference of a housing, and a multi-layered cylindrical body including a plurality of elastically deformable cylindrical thin plates layered on top of each other provided between an outer peripheral surface of the floating ring and an inner peripheral surface of the housing, so as to impart a radial restoring force against the eccentricity of the rotating shaft to restore it to its center position, and a tangential damping force to reduce the whirling of the rotating shaft.

公开(公告)号：US10359114B2

公开(公告)日：2019-07-23

申请号：US15680190

申请日：2017-08-17

Applicant: NOK CORPORATION

Inventor： Kazunari Seki ,  Koji Watanabe

IPC: F16J15/24 ,  F16J15/44 ,  F16J15/16

Abstract: A sealing device includes a seal ring 200 made of resin which is in close contact with a side wall surface on a low pressure side of an annular groove 410, and slides against an inner peripheral surface of a shaft hole in a housing 500 through which a shaft 400 is inserted. A metal spring 300 presses the seal ring 200 toward an outer peripheral surface side, wherein a concave portion 220 is formed on an outer peripheral surface of the seal ring 200 which extends from an end portion on a high pressure side of the outer peripheral surface to a position which does not reach an end portion on a low pressure side of the outer peripheral surface, and introduces a fluid from the high pressure side.

公开(公告)号：US10196987B2

公开(公告)日：2019-02-05

申请号：US15536352

申请日：2015-12-15

Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.

Inventor： Kohei Ozaki ,  Hidekazu Uehara ,  Azumi Yoshida ,  Hiroharu Oyama

IPC: F16J15/32 ,  F02C7/28 ,  F16J15/22 ,  F04D29/10 ,  F01D11/00 ,  F16J15/3292 ,  F16J15/24

Abstract: A shaft sealing mechanism (11) that partitions an annular space (14) that is formed between a fixed part (12) and a rotating shaft (13) into a high-pressure-side region and a low-pressure-side region, that obstructs the flow of a fluid (G), and that is provided with: a plurality of annularly laminated thin-plate seal pieces (22) that are fixed to an annular seal housing (21) that is provided to the fixed part and are in sliding contact with the rotating shaft; and an annular low-pressure-side plate (26) that is sandwiched and held such that a low-pressure-side gap (δL) is formed between the seal housing and a low-pressure-side side edge part (22d) of the thin-plate seal pieces. The thin-plate seal pieces have pressure-conduction holes (31) that are formed further to the inside in the radial direction of the rotating shaft than an inner-circumferential-side tip part (26a) of the low-pressure-side plate.

公开(公告)号：US10107401B2

公开(公告)日：2018-10-23

申请号：US15511880

申请日：2015-08-28

Applicant: NOK CORPORATION

Inventor： Hiroaki Monma ,  Mitsuo Watanabe ,  Shuji Yoshitsune ,  Kota Henmi

IPC: F16J15/24 ,  F16J15/34 ,  F16J15/00

Abstract: A sealing structure suppresses possible damage to a seal ring because of a backup ring. The sealing structure is characterized in that a cut portion 150 that is cut in a planar shape is formed in a backup ring 100 at one position in a circumferential direction, the cut portion 150 is configured such that a cut surface 153 is oblique to a central axis of the backup ring 100, an acute angle of angles between a surface on the high pressure side of the backup ring 100 and the cut surface 153 is set to not less than 15° and not more than 30°, and the backup ring 100 is formed of a resin material having Rockwell hardness of 100 or less, durometer hardness of 70 or less, and elastic modulus of 1.0 GPa or less.

公开(公告)号：US09512924B2

公开(公告)日：2016-12-06

申请号：US13522350

申请日：2011-01-11

Applicant: Yasuji Uesugi ,  Atsushi Hosokawa

Inventor： Yasuji Uesugi ,  Atsushi Hosokawa

IPC: F16J15/24 ,  F16J15/56 ,  F16J15/16 ,  F16J15/32

CPC classification number: F16J15/56 ,  F16J15/166 ,  F16J15/3216 ,  F16J15/322 ,  F16J15/3236

Abstract: An inner peripheral surface (10C) of an elastic seal (10) having a U-shaped cross section and made of rubber is supported by a guide ring (20) having a flat cross-sectional shape and made of synthetic resin.

Abstract translation: 具有U形横截面并由橡胶制成的弹性密封件（10）的内周面（10C）由具有扁平横截面形状并由合成树脂制成的导向环（20）支撑。