US20120061922A1 - Annular Sealing Device - Google Patents

Annular Sealing Device Download PDF

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Publication number
US20120061922A1
US20120061922A1 US13/227,931 US201113227931A US2012061922A1 US 20120061922 A1 US20120061922 A1 US 20120061922A1 US 201113227931 A US201113227931 A US 201113227931A US 2012061922 A1 US2012061922 A1 US 2012061922A1
Authority
US
United States
Prior art keywords
sealing
body portion
spaced apart
arms
metallic ring
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
US13/227,931
Other languages
English (en)
Inventor
Mark S. Whitlow
John S. Harr
Jason Cunningham
Kevin Lamb
Jason Adams
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.)
Coltec Industries Inc
Technetics Group LLC
Original Assignee
Coltec Industries Inc
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 Coltec Industries Inc filed Critical Coltec Industries Inc
Priority to US13/227,931 priority Critical patent/US20120061922A1/en
Assigned to BANK OF AMERICA, N.A., AS AGENT reassignment BANK OF AMERICA, N.A., AS AGENT SECURITY AGREEMENT Assignors: COLTEC INDUSTRIES INC., CORROSION CONTROL CORPORATION
Publication of US20120061922A1 publication Critical patent/US20120061922A1/en
Assigned to TECHNETICS GROUP LLC reassignment TECHNETICS GROUP LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LAMB, KEVIN, ADAMS, JASON, HARR, JOHN S., WHITLOW, MARK S.
Assigned to TECHNETICS GROUP LLC reassignment TECHNETICS GROUP LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CUNNINGHAM, JASON
Priority to US14/951,099 priority patent/US9797513B2/en
Priority to US15/787,951 priority patent/US10598284B2/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
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/08—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing
    • F16J15/0887—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing the sealing effect being obtained by elastic deformation of the packing
    • 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
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • 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
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/08—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing
    • 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
    • F16J15/26—Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing 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
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/26—Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings
    • F16J15/28—Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings with sealing rings made of metal
    • 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

Definitions

  • a conventional metallic C, V or U seal is often formed from sheet metal.
  • the tolerances required to control installation forces can be difficult to achieve using sheet metal.
  • parts manufactured from sheet metals are often formed from annealed material to facilitate the forming process. These parts would then require additional processing in the form of heat treatment (such as solution heat treatment followed by precipitation hardening) to achieve optimum material strength.
  • heat treatment such as solution heat treatment followed by precipitation hardening
  • the seal typically experiences dimensional changes that are often difficult to predict as the magnitude of the changes are proportional to the residual stresses in the formed part.
  • the shape of the typical formed C, V or U metal seal is difficult to machine from pre-hardened materials due to the inherent flexibility of the cross sectional geometry. Accordingly, there is a need for an annular seal that can be manufactured without the stress and tolerance issues common to traditional C, V or U shaped seals manufactured with traditional sheet metal processes. As such, a cross section geometry that can be machined from hardened materials is needed.
  • redundant seals may be used. Stacking or nesting traditional C, V or U shaped seals for sealing redundancy can result in unpredictable performance. Furthermore, there exists a need for an annular seal that can be stacked or nested for redundant sealing without distorting the cross section of the seal. A stacked arrangement could be used in bi-directional pressure applications. A nested arrangement could be used in a uni-directional pressure application.
  • the annular sealing device disclosed herein may be summarized as a metallic ring that has a cross section comprising: an axially extending body portion; a spaced apart pair of sealing arms extending axially from said body portion, wherein each said sealing arm includes a radially opposed arcuate (convex) sealing surface; and wherein said spaced apart pair of sealing arms are spaced apart a radial distance greater than the width of said body portion.
  • the annular seal may be described as a metallic ring that has a cross section comprising: an axially extending stem portion; a bulbous portion having radially opposed arcuate sealing surfaces; and an axial groove formed in said bulbous portion, wherein said axial groove is wider than the width of said stem portion.
  • the annular seal comprises a metallic ring having a cross section that includes an axially extending body portion having a radial width and an axial height.
  • a spaced apart pair of sealing arms extend axially from the body portion, wherein each sealing arm includes a radially opposed arcuate sealing surface.
  • the arcuate sealing surface may be convex, for example.
  • the spaced apart pair of sealing arms are spaced apart a radial distance greater than the radial width of the body portion.
  • the axial height of the body portion is commonly greater than its radial width.
  • the spaced apart pair of sealing arms defines a first groove and may include a second groove formed between the spaced apart pair of sealing arms.
  • the axial height of the body portion may be greater than the depth of the axial groove.
  • a sealing system comprising a plurality of interconnected metallic rings wherein the body portion engages the sealing arms of an adjacent metallic ring.
  • a method of closing a gap between components is also contemplated herein. The method comprises providing a first metallic ring and inserting it into the gap. The method may further comprise inserting a second metallic ring into the gap and engaging the body portion of the second metallic ring with the sealing arms of the first metallic ring. Alternatively, the method may further comprise inserting a second metallic ring into the gap and engaging the body portion of the first metallic ring with the body portion of the second metallic ring.
  • FIG. 1 is a top view of an annular sealing device according to a first exemplary embodiment
  • FIG. 2 is a cross section of the annular sealing device shown in FIG. 1 taken about line 2 - 2 ;
  • FIG. 3 is a partial perspective view of the annular sealing device shown in FIGS. 1 and 2 in an exemplary installation
  • FIG. 4 is an enlarged cross section of the annular sealing device shown in FIG. 2 ;
  • FIG. 5 is an enlarged cross section of an annular sealing device according to a second exemplary embodiment
  • FIG. 6 is an enlarged cross section of an annular sealing device according to a third exemplary embodiment
  • FIGS. 4A-6A are an enlarged cross section of an annular sealing device having alternative axial grooves
  • FIG. 7 is a cross section illustrating several annular sealing devices stacked in a nested arrangement.
  • FIG. 8 is a cross section illustrating two annular sealing devices stacked body portion to body portion.
  • annular sealing device having a configuration that is conducive to standard precision machining processes such as milling, turning, and boring. Accordingly, the annular sealing device according to the embodiments described herein results in more consistency and tighter tolerances for critical seal applications. Furthermore, these seals may be formed from unhardened or pre-hardened materials for dimensional stability throughout processing and while in service in extreme conditions. For example, the seal may comprise Alloy 718 in the solution heat treated and precipitation hardened condition. Also, the annular sealing device design allows for stacked seal arrangements that provide sealing redundancy for critical applications.
  • annular seal 10 is in the form of a ring having an outer diameter D and a cross sectional width W.
  • FIG. 3 illustrates the installation of seal 10 in a gap 3 between two cylindrical components 5 and 7 .
  • components 5 and 7 preferably include lead in chamfers in order to facilitate installation of seal 10 .
  • width W is selected depending on the application to fit in the gap 3 between mating cylindrical components, such as, for example, components 5 and 7 .
  • the seal cross sections disclosed herein may also be applied to other geometries.
  • FIG. 4 is a detailed view of the cross section of the annular seal 10 shown in FIGS. 1-3 .
  • the cross section is comprised of an axially extending body portion 20 , also referred to as a stem or trunk.
  • a spaced apart pair of sealing arms 30 extend axially from body portion 20 .
  • a transition from the trunk to the sealing arms may be formed by radii 24 , for example.
  • Each sealing arm 30 includes a radially facing arcuate sealing surface 32 .
  • Seal 10 includes a bulbous portion with an axial groove 42 formed therein to create the spaced apart sealing arms 30 .
  • Axial groove 42 serves to reduce the compressive load required to install the seal and creates a cavity by which the media being sealed can increase the contact forces at the seal interfaces resulting in improved sealing performance.
  • a second axial groove 44 may be formed in the bottom of axial groove 42 .
  • groove 44 has a radial width that is smaller than the radial width of axial groove 42 .
  • Grooves 42 and 44 include radii 43 and 45 respectively.
  • the material between radii 45 and 24 at the shoulder area 27 of sealing arms 30 acts as a flexure which allows the sealing arms to flex inward.
  • seal 10 may be configured as a preloaded seal.
  • the stiffness of the flexure may be varied by changing the depth and/or radial width of second axial groove 44 and the radius of radii 45 and 24 , thereby changing the shape and thickness of the shoulder area 27 .
  • the axial grooves 43 , 44 are shown to form generally rectangular shapes, but could form other geometries, such as a circle or the like.
  • Sealing surfaces 32 interface with the components to be sealed (components 5 and 7 for example). As shown in the figures, sealing surfaces 32 are radially opposed. The arcuate sealing surface 32 provides a line contact against the sealed components, which increases the surface pressure of the seal when compared to seals having an area contact. The exact radius of the arcuate sealing surface 32 is not critical. The dimensions may change depending on the application. One of ordinary skill in art will recognize that the arcuate shape of the sealing surfaces 32 facilitates the installation of the seal from either direction, depending on system pressure. To that end body portion 20 , in this embodiment, includes chamfers 22 which also facilitate installation.
  • Sealing arms 30 are spaced apart a radial distance slightly greater than the width of the body portion 20 .
  • multiple seals may be interconnected, or stacked, together with the body portion 20 of a first seal inserted into the first axial groove 42 of an adjacent seal.
  • This stacked seal arrangement provides a redundant sealing system and acts to stabilize both seals.
  • the radial width of the body portion 20 should be small enough to allow some radial deflection of the sealing arms 30 .
  • the axial length of body portion 20 also sets the distance between seals to prevent the sealing arms 30 of one seal from contacting the adjacent seal and potentially distorting the sealing surfaces. Accordingly, the axial length of body portion 20 may be greater than the depth of the first axial groove 42 .
  • the body portion 20 may be sized to fit in the second axial groove 44 .
  • body portion 20 may be used to hold the seal during manufacturing operations, as a bearing surface during seal installation, and to control the spacing between seals in stacked seal arrangements. Body portion 20 also adds to the seal's general stability and rigidity during installation which reduces or prevents “rolling” of the sealing arms during installation of one arm prior to the other.
  • the first and second axial grooves 42 , 44 also may be engaged to hold the seal during manufacturing and/or installation.
  • FIG. 5 illustrates an annular seal 210 according to a second exemplary embodiment.
  • Seal 210 includes a truncated body portion 220 . Similar to the first embodiment described above, seal 210 includes a pair of spaced apart sealing arms 230 that extend axially from body portion 220 . Each sealing arm 230 includes a radially facing arcuate sealing surface 232 . Axial grooves 242 and 244 are located between the spaced apart sealing arms 230 . Grooves 242 and 244 include radii 243 and 245 respectively. Seal 210 may be used in applications where a single seal is desired or multiple seals that do not require spacing from each other are employed. However, body portion 220 may be grasped as explained above to facilitate machining processes.
  • FIG. 6 illustrates an annular seal 310 according to a third exemplary embodiment.
  • Seal 310 is similar to the first and second embodiments described above except it does not include a body portion.
  • Seal 310 includes a pair of spaced apart sealing arms 330 that are joined by bridge portion 326 . Arms 330 extend axially from bridge portion 326 .
  • Each sealing arm 330 includes a radially facing arcuate sealing surface 332 .
  • the arcuate sealing surfaces of the sealing arms continue around bridge portion 326 .
  • the seal has a continuous arcuate surface in the form of a U or C shape.
  • the seal includes axial grooves 342 and 344 located between the spaced apart sealing arms 330 . Grooves 342 and 344 include radii 343 and 345 respectively.
  • Seal 310 may be used in applications where a single seal is desired or multiple seals that do not require spacing from each other are employed.
  • FIGS. 4-6 show various exemplary embodiments of the annular sealing device generally having a first and second axial groove 42 ( 242 , 342 ) and 44 ( 244 , 344 ).
  • FIGS. 4A-6A alternative embodiments of axial grooves for the annular sealing device are provided. Each of the alternative axial grooves are shown with respect to the annular sealing device 10 , but could be used in conjunction with annular sealing device 10 , 210 , 310 , or the like.
  • the annular seal 10 1 is provided having a single axial groove 42 a .
  • the axial groove 42 a comprises a relatively rectangular shape having a width W and a depth D that is relatively constant across the width W.
  • Sealing arms 30 have relatively straight sidewalls 31 and a relatively flat bottom 33 .
  • the annular sealing device is similar in that it has a single axial groove 42 b .
  • the axial groove 42 b similarly has a maximum width W and a maximum depth D.
  • the axial groove 42 b is formed by relatively straight sidewalls 31 that extend to a first depth D 1 at which point the straight sidewalls 31 transition to a concave bottom 33 b having a generally arcurate shape with a radius r 1 . While shown as a single radius r 1 , the arcurate shape may be formed by variable radii.
  • the single axial groove 42 b forms a generally U shape. With respect to FIG.
  • a third embodiment of the single axial groove 42 c is provided.
  • the axial groove 42 c has a maximum width W and a maximum depth D.
  • the axial groove 42 is formed by relatively straight sidewalls 31 extending to a first depth D 1 at which point the straight sidewalls 31 transition to a triangular shaped bottom 33 c formed by two converging surfaces.
  • FIG. 7 illustrates several annular seals 410 according to a fourth exemplary embodiment.
  • seals 410 are nested to provide redundant sealing.
  • Body portions 420 establish the distance between the sealing surfaces.
  • Axial groove 442 creates a cavity by which the pressure P of the media being sealed can increase the contact forces at the seal interfaces resulting in improved sealing performance.
  • FIG. 8 illustrates a pair of annular seals 510 , according to a fifth exemplary embodiment, wherein the seals are stacked end to end or body portion 520 to body portion 520 . In this arrangement, the pressure P is effectively sealed from either direction.
  • the methods may include the steps of providing a first metallic ring and inserting it into the gap.
  • the method may further comprise inserting a second metallic ring into the gap and engaging the body portion of the second metallic ring with the sealing arms of the first metallic ring.
  • the method may further comprise inserting a second metallic ring into the gap and engaging the body portion of the first metallic ring with the sealing arms of the second metallic ring.
  • annular sealing device has been described with some degree of particularity directed to the exemplary embodiments. It should be appreciated, however, that the present invention is defined by the following claims construed in light of the prior art so that modifications or changes may be made to the exemplary embodiments without departing from the inventive concepts contained herein.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gasket Seals (AREA)
  • Mechanical Sealing (AREA)
US13/227,931 2010-09-09 2011-09-08 Annular Sealing Device Abandoned US20120061922A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US13/227,931 US20120061922A1 (en) 2010-09-09 2011-09-08 Annular Sealing Device
US14/951,099 US9797513B2 (en) 2010-09-09 2015-11-24 Annular sealing device
US15/787,951 US10598284B2 (en) 2010-09-09 2017-10-19 Annular sealing device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US38121310P 2010-09-09 2010-09-09
US13/227,931 US20120061922A1 (en) 2010-09-09 2011-09-08 Annular Sealing Device

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US14/951,099 Continuation US9797513B2 (en) 2010-09-09 2015-11-24 Annular sealing device

Publications (1)

Publication Number Publication Date
US20120061922A1 true US20120061922A1 (en) 2012-03-15

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Application Number Title Priority Date Filing Date
US13/227,931 Abandoned US20120061922A1 (en) 2010-09-09 2011-09-08 Annular Sealing Device
US14/951,099 Active US9797513B2 (en) 2010-09-09 2015-11-24 Annular sealing device
US15/787,951 Active US10598284B2 (en) 2010-09-09 2017-10-19 Annular sealing device

Family Applications After (2)

Application Number Title Priority Date Filing Date
US14/951,099 Active US9797513B2 (en) 2010-09-09 2015-11-24 Annular sealing device
US15/787,951 Active US10598284B2 (en) 2010-09-09 2017-10-19 Annular sealing device

Country Status (7)

Country Link
US (3) US20120061922A1 (zh)
EP (1) EP2614275A4 (zh)
CN (1) CN203272786U (zh)
BR (1) BR112013005437A2 (zh)
CA (1) CA2809625A1 (zh)
SG (1) SG187949A1 (zh)
WO (1) WO2012033910A2 (zh)

Cited By (6)

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Publication number Priority date Publication date Assignee Title
GB2569063A (en) * 2016-10-04 2019-06-05 Nat Coupling Co Inc Undersea hydraulic coupling with multiple pressure-energized metal seals
GB2557004B (en) * 2016-10-04 2019-06-12 Nat Coupling Co Inc Undersea hydraulic coupling with multiple pressure-energized metal seals
EP4063698A1 (en) * 2021-03-23 2022-09-28 SMC Corporation Shaft sealing structure
JP2022151584A (ja) * 2021-03-23 2022-10-07 Smc株式会社 軸シール構造
US11614187B2 (en) 2016-10-04 2023-03-28 National Coupling Company, Inc. Undersea hydraulic coupling with multiple pressure-energized metal seals
US11920704B2 (en) 2016-10-04 2024-03-05 National Coupling Company, Inc. Undersea hydraulic coupling with multiple pressure-energized metal seals

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US20120061922A1 (en) * 2010-09-09 2012-03-15 Coltec Industries, Inc. Annular Sealing Device
CN110242805A (zh) * 2018-03-08 2019-09-17 郑州宇通客车股份有限公司 车载氢系统管接头密封结构及燃料电池车辆
CN110260229A (zh) * 2019-06-24 2019-09-20 海洋王照明科技股份有限公司 舱顶灯
CN115053092A (zh) * 2020-02-19 2022-09-13 美国圣戈班性能塑料公司 柔性低温密封体

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2569063A (en) * 2016-10-04 2019-06-05 Nat Coupling Co Inc Undersea hydraulic coupling with multiple pressure-energized metal seals
GB2557004B (en) * 2016-10-04 2019-06-12 Nat Coupling Co Inc Undersea hydraulic coupling with multiple pressure-energized metal seals
US10400541B2 (en) 2016-10-04 2019-09-03 National Coupling Company Undersea hydraulic coupling with multiple pressure-energized metal seals
GB2569063B (en) * 2016-10-04 2020-02-19 Nat Coupling Co Inc Undersea hydraulic coupling with multiple pressure-energized metal seals
US11512553B2 (en) 2016-10-04 2022-11-29 National Coupling Company Undersea hydraulic coupling with multiple pressure-energized metal seals
US11614187B2 (en) 2016-10-04 2023-03-28 National Coupling Company, Inc. Undersea hydraulic coupling with multiple pressure-energized metal seals
US11920704B2 (en) 2016-10-04 2024-03-05 National Coupling Company, Inc. Undersea hydraulic coupling with multiple pressure-energized metal seals
EP4063698A1 (en) * 2021-03-23 2022-09-28 SMC Corporation Shaft sealing structure
JP2022151584A (ja) * 2021-03-23 2022-10-07 Smc株式会社 軸シール構造
JP7403752B2 (ja) 2021-03-23 2023-12-25 Smc株式会社 軸シール構造
EP4321784A3 (en) * 2021-03-23 2024-05-01 SMC Corporation Shaft sealing structure
US11976729B2 (en) 2021-03-23 2024-05-07 Smc Corporation Shaft sealing structure

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WO2012033910A2 (en) 2012-03-15
SG187949A1 (en) 2013-03-28
WO2012033910A3 (en) 2012-06-14
EP2614275A2 (en) 2013-07-17
CA2809625A1 (en) 2012-03-15
US20160215886A1 (en) 2016-07-28
CN203272786U (zh) 2013-11-06
US10598284B2 (en) 2020-03-24
US9797513B2 (en) 2017-10-24
US20180094727A1 (en) 2018-04-05
EP2614275A4 (en) 2016-10-26
BR112013005437A2 (pt) 2016-06-07

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