US20110037235A1 - Seal ring - Google Patents

Seal ring Download PDF

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Publication number
US20110037235A1
US20110037235A1 US12/937,787 US93778709A US2011037235A1 US 20110037235 A1 US20110037235 A1 US 20110037235A1 US 93778709 A US93778709 A US 93778709A US 2011037235 A1 US2011037235 A1 US 2011037235A1
Authority
US
United States
Prior art keywords
seal ring
housing
seal
diameter
peripheral face
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/937,787
Other languages
English (en)
Inventor
Nobuyuki Eguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nok Corp
Original Assignee
Nok Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nok Corp filed Critical Nok Corp
Assigned to NOK CORPORATION reassignment NOK CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: EGUCHI, NOBUYUKI
Publication of US20110037235A1 publication Critical patent/US20110037235A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3268—Mounting of sealing rings
    • F16J15/3272—Mounting of sealing rings the rings having a break or opening, e.g. to enable mounting on a shaft otherwise than from a shaft end
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
    • F16J15/3464—Mounting of the seal
    • F16J15/3488—Split-rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/44—Free-space packings
    • F16J15/441—Free-space packings with floating ring
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49863—Assembling or joining with prestressing of part

Definitions

  • the present invention relates to a seal ring for sealing an annular gap between two members which are provided movable relative to each other.
  • a demand for a seal ring made of a resin such as PEEK or PPS manufactured by injection molding, in which the shape of a cut provided in a place in the circumference of the seal ring is set as a special step cut is increasing.
  • Patent Literature disclosing conventional techniques related to the present invention are, for example, Patent Literature 1 and 2.
  • Patent Literature 1 Japanese Patent Application Laid-Open No. 61-270564
  • Patent Literature 2 Japanese Patent No. 3,362,099
  • the present invention has been achieved in view of the above-described circumstances and an object of the invention is to provide a technique capable of suppressing sandwiching of a foreign matter between a seal ring and a housing and suppressing abrasion of the housing and the seal ring.
  • the present invention employs the following configuration.
  • the outside diameter of the seal ring at the time of manufacture is set to be larger than the inside diameter of the housing.
  • a seal ring includes a first seal portion which is attached in an annular groove provided in a shaft member to be assembled in a shaft hole in a housing and which comes into close contact with a sidewall face on a side of a fluid which is not to be sealed of the annular groove, and a second seal portion which comes into close contact with an inner peripheral face of the housing, the seal ring for sealing an annular gap between the shaft member and the housing, having a separation portion provided in one place in the circumferential direction of the ring body, the separation portion provided with, at one separation end, a circular projection which projects in the circumferential direction and, at the other separation end, a circular recess which engages with the circular projection, the circular projection and the circular recess being provided with mating faces which enable relative movement in the circumferential direction, and capable of absorbing a change in circumferential length of the ring body by the relative movement in the circumferential direction between the circular projection and the circular recess, wherein the size of the diameter of the second seal portion is set to be larger
  • a seal ring includes a first seal portion which is attached in an annular groove provided in a shaft member to be assembled in a shaft hole in a housing and which comes into close contact with a sidewall face on a side of a fluid which is not to be sealed of the annular groove, and a second seal portion which comes into close contact with an inner peripheral face of the housing, the seal ring for sealing an annular gap between the shaft member and the housing, having a separation portion provided in one place in the circumferential direction of the ring body, the separation portion provided with, at one separation end, a circular projection which projects in the circumferential direction and, at the other separation end, a circular recess which engages with the circular projection, the circular projection and the circular recess being provided with mating faces which enable relative movement in the circumferential direction, and capable of absorbing a change in circumferential length of the ring body by the relative movement in the circumferential direction between the circular projection and the circular recess, wherein the size of the diameter of the second seal portion is set to be larger
  • a technique capable of suppressing sandwiching of a foreign matter between a seal ring and a housing and suppressing abrasion of the housing and the seal ring can be provided.
  • FIG. 1 is a plan view of a seal ring according to a first embodiment of the invention.
  • FIG. 2 is a partially-broken perspective view showing a main part of the seal ring 1 according to the first embodiment of the invention.
  • FIG. 3 is a schematic section showing the seal ring 1 according to the first embodiment of the invention.
  • FIG. 4(A) is a plan view of a seal ring 10 according to a second embodiment of the invention and is a diagram showing the seal ring 10 at the time of molding (at the time of manufacture)
  • FIG. 4(B) is a plan view of the seal ring 10 according to the second embodiment of the invention and is a diagram showing the seal ring 10 subjected to an additional process (shaping process) after molding.
  • FIG. 5 is a diagram for explaining the time when the seal ling 1 is mounted.
  • FIG. 1 is a plan view of the seal ring according to the embodiment.
  • FIG. 2 is a partially-broken perspective view showing a main part of the seal ring 1 according to the embodiment.
  • FIG. 3 is a schematic section showing the seal ring 1 according to the embodiment.
  • the seal ring 1 is provided to seal (hermetically close) an annular gap between a housing 80 as another member provided with a shaft hole and a shaft 70 as one member inserted in the shaft hole, and is used by being attached in an annular groove 71 provided for the shaft 70 .
  • the seal ring 1 is made of a resin material and has a first seal portion 4 for sealing a sidewall face 72 on a side A of a fluid which is not to be sealed in the annular groove 71 and a second seal portion 3 for sealing an inner peripheral face 81 of the shaft hole provided for the housing 80 .
  • the fluid to be sealed is, for example, lubricating oil and, particularly, in the case where it is used for a transmission of a car, it refers to an ATF (Automatic Transmission Fluid).
  • ATF Automatic Transmission Fluid
  • the ring body of the seal ring 1 is provided with a separation portion 2 in a place in the circumferential direction for the purpose of improvement in assembly and the like.
  • a separation portion 2 which can reduce a leakage amount and suitably handle a change in ambient temperature
  • a special step cut which has two steps is adopted. Specifically, as shown in the diagram, a stepped separation portion is formed in each of the first seal portion 4 side and the second seal portion 3 side.
  • the special step cut has a set of a (circular) projection 21 and a (circular) recess 22 in a lateral direction (axial direction) on one of outer peripheral sides and has a set of a (circular) recess 24 and a (circular) projection 23 in the lateral direction on the other side via the separation portion.
  • the projection 21 and the recess 24 fit each other, and the recess 22 and the projection 23 fit each other.
  • the special step cut has a configuration to separate between the side O of the fluid to be sealed and the side A of the fluid which is not to be sealed while having clearances in the circumferential direction of faces perpendicular to each other in the circumferential direction (in FIG. 2 , a clearance 27 formed between a front end face of the projection 21 and an opposed face of the recess 24 facing the front end face, a clearance 28 formed between a front end face of the projection 23 and the opposed face of the recess 22 facing the front end face, and a clearance 29 on the inner circumferential side).
  • the projection 23 and the recess 22 come into sliding contact with a separating face 25 concentric with the second seal portion 3 and also a separating face 26 perpendicular to the axis.
  • an outer diameter d 1 of the seal ring 1 is set to be larger than an inner diameter d 2 of the housing 80 in a natural state before attachment to the annular groove 71 (no external force is applied).
  • the seal ring 1 By constructing the seal ring 1 in such a manner, in the case where the seal ring 1 is attached in the annular groove 71 and is disposed in the annular gap between the housing 80 and the shaft 70 , the seal ring 1 is always in close contact with the inner circumferential face of the housing 80 , and invasion of a foreign matter to the outer peripheral face of the seal ring 1 caused by occurrence of the gap between the outer peripheral face of the seal ring 1 and the inner peripheral face of the housing 80 can be suppressed. Thus, the seal performance can be improved, and the longer life can be achieved.
  • a special step cut is used as the separation portion 2 in the seal ring 1 .
  • the separation portion in the seal ring is, for example, a straight cut
  • the temperature of the seal ring rises
  • separation portions butt each other due to a change with time caused by heat and a permanent distortion (plastic-deformable state) occurs due to generation of a compression force in the circumferential direction around the separation portion.
  • a permanent distortion occurs and the circumference length of the seal ring is shortened in a room-temperature or a low-temperature region, there is a possibility that a leak amount increases.
  • the separation portion 2 is used as a special step cut. An amount of a change in dimension can be absorbed only by the amount of the clearances 27 , 28 , and 29 in the separation portion 2 . Thus, the sealing performance can be maintained even a change occurs in the ambient temperature.
  • FIG. 4(A) is a plan view of a seal ring 10 according to a second embodiment of the invention and is a diagram showing the seal ring 10 at the time of molding (at the time of manufacture), and FIG. 4(B) is a view of the seal ring 10 and is a diagram showing the seal ring 10 subjected to an additional process (shaping process) after molding.
  • FIG. 5 is a diagram for explaining attachment of the seal ring.
  • the basic configuration of the seal ring 10 in the embodiment is similar to that of the seal ring 1 described in the first embodiment.
  • the same reference numerals are denoted to likewise components and their description will not be repeated.
  • the outer diameter of the seal ring 1 is set to be larger than the inner diameter of the housing 80 .
  • the outer periphery of the seal ring 1 interferes the housing 80 (portion B in FIG. 5 ), and it becomes difficult to assemble the shaft 70 in which the seal ring 1 is attached to the annular groove 71 to the shaft hole in the housing 80 as shown in FIG. 5 .
  • the seal ring 10 is molded in such a manner that the outer diameter of the seal ring 10 is larger than the inner diameter of the housing 80 like the seal ring 1 of the first embodiment (refer to FIG. 4(A) ). After that, adjustment is made by an additional process (shaping process) so that the outer diameter of the seal ring 10 becomes smaller than the inner diameter of the housing 80 (refer to FIG. 4 (B)).
  • the shaft 70 in which the seal ring 10 is attached in the annular groove 71 is assembled in the shaft hole in the housing 80 . After that, by performing pre-conditioning interim operation or applying heat to the equipment, the outer diameter of the seal ring 10 is expanded, and the annular gap between the seal ring 10 and the inner circumferential face of the housing 80 is sealed.
  • the seal ring 10 is molded so that an outer diameter d 3 of the ring body is larger than an inner diameter d 2 of the housing by 5 to 10%.
  • the seal ring 10 is molded by, for example, injection molding.
  • the separation portion 2 is also formed in the seal ring 10 .
  • the seal ring 10 is loaded and restrained in a hot forming die.
  • the hot forming die has a groove on the inner diameter side of an annular heating ring, in which the seal ring 10 is to be fit.
  • the hot forming die has, on the outer diameter side, a heater for heating the heating ring itself.
  • the seal ring 10 is restrained in the groove in the hot forming die and heated by the heater, thereby performing the shaping process to substantially reduce the outside diameter of the seal ring 10 .
  • the outside diameter d 4 of the seal ring 10 is adjusted to be smaller than the inner diameter of the housing 80 by 0 to 1.0 mm, preferably, 0.2 to 0.4 mm.
  • the seal ring 10 After the seal ring 10 is assembled in the housing 80 , by execution of pre-conditioning interim operation (or the equipment may be operated a few times) or by application of heat to the equipment, the seal ring 10 expands. Consequently, the seal ring 10 comes into close contact with the inner circumferential face of the housing 80 .

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Devices (AREA)
US12/937,787 2008-04-15 2009-04-10 Seal ring Abandoned US20110037235A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2008106062A JP5292902B2 (ja) 2008-04-15 2008-04-15 シールリングの装着方法
JP2008-106062 2008-04-15
PCT/JP2009/057379 WO2009128406A1 (ja) 2008-04-15 2009-04-10 シールリング

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2009/057379 A-371-Of-International WO2009128406A1 (ja) 2008-04-15 2009-04-10 シールリング

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US13/951,231 Division US9291271B2 (en) 2008-04-15 2013-07-25 Seal ring

Publications (1)

Publication Number Publication Date
US20110037235A1 true US20110037235A1 (en) 2011-02-17

Family

ID=41199099

Family Applications (2)

Application Number Title Priority Date Filing Date
US12/937,787 Abandoned US20110037235A1 (en) 2008-04-15 2009-04-10 Seal ring
US13/951,231 Active 2029-10-01 US9291271B2 (en) 2008-04-15 2013-07-25 Seal ring

Family Applications After (1)

Application Number Title Priority Date Filing Date
US13/951,231 Active 2029-10-01 US9291271B2 (en) 2008-04-15 2013-07-25 Seal ring

Country Status (3)

Country Link
US (2) US20110037235A1 (ja)
JP (1) JP5292902B2 (ja)
WO (1) WO2009128406A1 (ja)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104704239A (zh) * 2012-09-28 2015-06-10 萱场工业株式会社 可变容量型叶片泵
CN108869383A (zh) * 2018-07-23 2018-11-23 丽水市艺木创意设计有限公司 O型高压泵密封圈
US20190178382A1 (en) * 2016-05-13 2019-06-13 Nok Corporation Seal ring
CN114857378A (zh) * 2021-02-04 2022-08-05 中国航发商用航空发动机有限责任公司 管接头密封结构、涡轮、燃气涡轮发动机以及管接头
US20220356949A1 (en) * 2020-01-22 2022-11-10 Denso Corporation Valve device

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103403413B (zh) 2011-03-11 2015-05-13 Nok株式会社 密封装置
KR102038238B1 (ko) * 2015-10-13 2019-11-26 엔오케이 가부시키가이샤 실 링
CN108916383A (zh) * 2015-12-03 2018-11-30 Nok株式会社 轴和密封构造
CN107135626A (zh) * 2017-06-28 2017-09-05 上海摩软通讯技术有限公司 一种防水结构及电子设备
JP2022140167A (ja) * 2021-03-12 2022-09-26 Ntn株式会社 シールリング

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5660398A (en) * 1994-11-08 1997-08-26 Honda Giken Kogyo Kabushiki Kaisha Hydraulic sealing device
JPH102424A (ja) * 1996-06-17 1998-01-06 Nok Corp シールリング
JPH1019128A (ja) * 1996-07-01 1998-01-23 Nok Corp シールリングの製造方法及びシールリング
JP2006112548A (ja) * 2004-10-15 2006-04-27 Nok Corp シールリング

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JPS57104057A (en) 1980-12-19 1982-06-28 Hitachi Ltd Absorption type refrigerating machine
JPS61270564A (ja) * 1985-05-25 1986-11-29 Riken Corp 流体シ−ル用リング
US5131666A (en) * 1990-10-12 1992-07-21 Fisher Controls International, Inc. Zero clearance anti-extrusion rings for containment of ptfe packing
JP2729886B2 (ja) * 1992-12-25 1998-03-18 株式会社リケン 合成樹脂製シールリング
US5934680A (en) * 1995-05-31 1999-08-10 Ntn Corporation Split resin seal ring with chamfered end connection structures
JPH08338538A (ja) * 1995-06-09 1996-12-24 Honda Motor Co Ltd 油圧シール装置
US5882012A (en) * 1995-11-30 1999-03-16 Ntn Corporation Oil seal ring
JP3362099B2 (ja) * 1997-01-27 2003-01-07 エヌオーケー株式会社 シールリングの製造方法及び樹脂材料により製作されるシールリング
JP4362668B2 (ja) * 1999-12-14 2009-11-11 Ｎｏｋ株式会社 合成樹脂製シールリングの製造方法
JP2002372153A (ja) * 2001-06-18 2002-12-26 Nok Corp シールリングの製造方法
JP2003021239A (ja) * 2001-07-10 2003-01-24 Nok Corp シールリングの製造方法
JP2003035367A (ja) * 2001-07-24 2003-02-07 Nok Corp シールリング
JP3746214B2 (ja) * 2001-09-10 2006-02-15 大電株式会社 塞栓構造
US7010844B2 (en) * 2003-09-12 2006-03-14 Ford Global Technologies, Llc Method for assembling components using split seal
JP4670272B2 (ja) * 2004-07-26 2011-04-13 Ｎｏｋ株式会社 シールリング
JP2006083779A (ja) * 2004-09-16 2006-03-30 Toyota Motor Corp ターボチャージャのシール構造

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5660398A (en) * 1994-11-08 1997-08-26 Honda Giken Kogyo Kabushiki Kaisha Hydraulic sealing device
JPH102424A (ja) * 1996-06-17 1998-01-06 Nok Corp シールリング
JPH1019128A (ja) * 1996-07-01 1998-01-23 Nok Corp シールリングの製造方法及びシールリング
JP2006112548A (ja) * 2004-10-15 2006-04-27 Nok Corp シールリング

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104704239A (zh) * 2012-09-28 2015-06-10 萱场工业株式会社 可变容量型叶片泵
US20190178382A1 (en) * 2016-05-13 2019-06-13 Nok Corporation Seal ring
CN108869383A (zh) * 2018-07-23 2018-11-23 丽水市艺木创意设计有限公司 O型高压泵密封圈
US20220356949A1 (en) * 2020-01-22 2022-11-10 Denso Corporation Valve device
CN114857378A (zh) * 2021-02-04 2022-08-05 中国航发商用航空发动机有限责任公司 管接头密封结构、涡轮、燃气涡轮发动机以及管接头

Also Published As

Publication number Publication date
JP2009257439A (ja) 2009-11-05
JP5292902B2 (ja) 2013-09-18
WO2009128406A1 (ja) 2009-10-22
US20130313781A1 (en) 2013-11-28
US9291271B2 (en) 2016-03-22

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Legal Events

Date Code Title Description
AS Assignment

Owner name: NOK CORPORATION, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:EGUCHI, NOBUYUKI;REEL/FRAME:025139/0161

Effective date: 20100923

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION