WO1990007664A1 - Joint annulaire - Google Patents

Joint annulaire Download PDF

Info

Publication number
WO1990007664A1
WO1990007664A1 PCT/US1990/000079 US9000079W WO9007664A1 WO 1990007664 A1 WO1990007664 A1 WO 1990007664A1 US 9000079 W US9000079 W US 9000079W WO 9007664 A1 WO9007664 A1 WO 9007664A1
Authority
WO
WIPO (PCT)
Prior art keywords
annular
lip
heel
comprised
web
Prior art date
Application number
PCT/US1990/000079
Other languages
English (en)
Inventor
Thomas Roy SMITH
Mark Hallett LINDAMAN
Original Assignee
J.M. Clipper Corporation
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 J.M. Clipper Corporation filed Critical J.M. Clipper Corporation
Publication of WO1990007664A1 publication Critical patent/WO1990007664A1/fr

Links

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
    • 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
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • F16J15/3228—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip formed by deforming a flat ring

Definitions

  • ANNULAR SEAL Field of the Invention This invention relates to a seal. Hore particularly, it relates to an annular seal of the type typically used to seal a shaft.
  • Sealing members are available in a variety of shapes, sizes and materials in order to suit the needs of particular environments.
  • One type of sealing member used to seal against entry of fluids such as oil, water, grease and other service media combines rubber and Teflon, a trademark of E.I. DuPont de Nemours Company for its polytetrafluoroethylene material.
  • Sealing members of this general type have existed in different forms over the years.
  • alternate layers of Teflon and rubber provided in the form of washers were assembled in a metal casing adapted to fit in a bore of a member to be sealed.
  • the washer elements were bent or biased at their inner peripheries by contact with the shaft or other member being sealed.
  • both the rubber elements and the Te lon elements engaged the shaft.
  • Seals of this type and their method of manufacture are disclosed in U.S. Patent Nos. 3,275,331 and 3,387,850, both of which issued to Mastrobattista et al.
  • annular seals combining rubber and Teflon have consisted of a single layer of rubber bonded to a single layer of Teflon, with the combined layers adjacent their outer peripheries being sealed in a metal shell between an annular outer metal case and an annular inner metal case.
  • the combined layers extend radially inwardly from the metal shell in the form of a flexible lip which is adapted to engage th.e shaft or other member being sealed.
  • the Teflon layer is the layer in contact with the shaft, while the flexible rubber backing layer urges the Teflon lip toward the shaft.
  • Hetal shell installation pressing tools have to be used to avoid seal case damage and cocking of the seal. Since recommended installation procedures are not always followed by workmen in the field, it is apparent that the only way to correct this situation is to redesign the seal so that this problem no longer exists. The metal casing must therefore -be redesigned or eliminated.
  • This invention provides an annular seal comprising an outer annular heel comprised of flexible elastomeric material and an inner annular portion comprised of flexible elastomeric material having greater flexibility than that of the heel.
  • the inner annular portion comprises an outer annular base portion connected by a web to a radially inwardly extending annular lip.
  • the lip extends at an angle to the web and is spaced from the outer annular base of the inner annular portion so that it is capable of being flexed radially inwardly toward the outer annular base.
  • a layer of inert fluorocarbon resin having a low coefficient of friction is bonded to the annular lip and to the web so that the resin layer at the free end of the lip is adapted to contact the surface being sealed.
  • the resin layer which preferably is comprised of polytetrafluoroethylene, is bonded to the heel as well as to the annular lip and the web.
  • the annular heel contains fibers uniformly distributed throughout the composition to make the heel relatively hard and structurally capable of supporting the annular lip during installation and during operation.
  • the heel is comprised of rubber and polyaramid fibers
  • the lip is comprised of rubber having a hardness less than that of the heel.
  • the seal is capable of highly satisfactory performance, and can withstand a great deal more abuse during installation than a seal requiring a metal casing.
  • FIG. 1 is a partial pictorial view of the annular seal of the present invention
  • FIG. 2 is an enlarged transverse sectional view of the annular seal of FIG. 1;
  • FIG. 3 is a partial sectional view taken transversely through a seal of the present invention which is mounted in sealing engagement on a shaft;
  • FIG. 4 is a partial sectional view similar to the upper portion of the view of FIG. 3, but showing a modified form of seal.
  • the annular seal 10 of the invention comprises an outer annular heel 12 bonded to an inner annular portion 14.
  • the inner annular portion comprises an outer annular base portion 16, which is the part of the portion 14 that is bonded to the heel 12, a lip 18 and a web 20 connecting the lip 18 and the base portion 16.
  • the lip 18 is directed radially inwardly from the base 16 at an angle such that the distance between the free end 22 of the lip and the base 16 is greater than the distance between the base 16 and the end of the lip adjacent the web 20.
  • the side 24 of the inner annular portion 14 adjacent the web 20 is aligned -with the adjacent side 26 of the heel 12.
  • Bonded to the heel 12 along the side face 26 and to the inner annular portion 14 along the face 24 is a layer 28 of inert fluorocarbo ⁇ resin having a low coefficient of friction, such as polytetrafluoroethylene sold under the trademark Teflon.
  • the Teflon layer 28 extends radially inwardly along the inner face of the lip 18, being bonded to the lip inner face and terminating at the free end 22 of the lip. Thus the layer 28 is bonded to the entire one side of the annular seal 10.
  • the inner annular portion 14 is comprised of elastomeric material which is sufficiently flexible to allow the lip to be flexed away from a shaft on which it is installed.
  • a suitable rubber such as Buna-N is employed as the elastomeric material.
  • the heel 12 is comprised of a tougher, denser material which has greater hardness and less flexibility than that of the lip 18 but which can withstand the twisting and bending encountered during installation without being damaged.
  • elastomeric materials as neoprene, fluoroelastomers or other polymers have been found to perform satisfactorily.
  • the heel which functions as a rigid member after installation, incorporates reinforcing fibers distributed throughout the elastomeric composition in sufficient amounts to provide the desired structural properties.
  • Any fibers which are compatible with the elastomer and which will provide these functions at an acceptable cost can be employed, with the best combination of properties resulting from a composition comprised of 101 to 50X, by weight, of fibers.
  • Any compatible fiber which meets the cost and strength requirements of the product may be employed, such as fibers formed from glass, polyester, cellulosic materials or a polyaramid.
  • a particular composition which has been found to perform well comprises neoprene reinforced with polyaramid fibers sold under the DuPont trademark Kevlar.
  • the layer 28 may be comprised of virgin or filled polytetrafluoroethylene. Thus either Teflon or Teflon filled with a wear resistant material such as Holyglass fibers, which are fibers formed of both molybdenum and fiber glass, may be utilized. In either case the function of the layer 28 is the same.
  • the layer 28 at the end of the lip contacts the shaft on which the seal is mounted and provides sealing engagement with a minimum of friction. Referring to FIG. 3, the seal 10 is shown positioned in the bore 30 of a member 32 being sealed and mounted on the shaft 34.
  • the heel 12 has allowed the seal 10 to be installed without danger of being damaged and is capable of conforming to minor housing irregularities and resisting most common bearing lubricants.
  • the diameter of the shaft 34 is slightly larger than the diameter of the end of. the radial lip of the seal, causing the lip to be flexed away- from the shaft. This is possible due to the flexible rubber composition of the lip, which exerts a radially inwardly directed bias against the shaft.
  • the Teflon layer at the end of the lip 18 contacts the shaft in sealing engagement under the urging of the rubber lip 18.
  • a garter spring 36 may be provided in an annular recess in the rubber side of the lip 18, as shown in FIG. 4. This exerts a greater biasing force against the shaft than the arrangement without the spring and maintains the Teflon edge of the lip in sealing engagement with the shaft. In normal usage, however, a garter spring would not have to be employed.
  • the manufacturing process for the seal is relatively simple, involving a molding process wherein the heel 12, the inner annular portion 14 and the Teflon layer 28 are bonded together.
  • the lip 18 provides the necessary flexibility to urge the Teflon at the end of the lip against the shaft on which the seal is mounted, the heel provides the required amount of flexibility while at the same time lending strength and sufficient hardness to the seal, and the Teflon provides both the edge seal and low friction engagement with the shaft.
  • the Teflon layer further unites the heel 12 and the portion 14 by extending from the free end of the lip 18 to the outermost end of the side surface 26 of the heel.

Abstract

L'invention concerne un joint annulaire composé d'un talon (12), d'une languette (18) s'étendant radialement intérieurement et d'une bande (20) reliant le talon et la languette. Le talon est composé de polymère renforcé par des fibres, et la languette est constituée d'une composition de caoutchouc souple. Une couche de résine (28) présentant un faible coefficient de frottement, telle que le polytétrafluoroéthylène, couvre les côtés adjacents du talon, de la bande et de la languette. Ledit talon, ladite bande et ladite languette sont tous liés ensemble pour former une unité de joint d'étanchéité solidaire (10).
PCT/US1990/000079 1989-01-09 1990-01-09 Joint annulaire WO1990007664A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US29422689A 1989-01-09 1989-01-09
US294,226 1989-01-09

Publications (1)

Publication Number Publication Date
WO1990007664A1 true WO1990007664A1 (fr) 1990-07-12

Family

ID=23132439

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1990/000079 WO1990007664A1 (fr) 1989-01-09 1990-01-09 Joint annulaire

Country Status (2)

Country Link
AU (1) AU5023290A (fr)
WO (1) WO1990007664A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4035658A1 (de) * 1990-11-09 1992-05-14 Baedje K H Meteor Gummiwerke Streifenartiges bauteil fuer dichtungszwecke usw.
WO1992018578A1 (fr) * 1991-04-23 1992-10-29 E.I. Du Pont De Nemours And Company Joint industriel utilise dans des applications au contact de la vapeur
EP0541036A2 (fr) * 1991-11-06 1993-05-12 Skf Industrie S.P.A. Bague d'étanchéité, notamment pour paliers à roulement
US5269539A (en) * 1992-04-13 1993-12-14 Trw Inc. Hydraulic shaft seal
NL9300759A (nl) * 1993-05-05 1994-12-01 Skf Ind Spa Afdichtingsscherm, zoals voor wentellagers.
US5592994A (en) * 1994-12-15 1997-01-14 Jks Boyles International Inc. Propulsion seal for wire line core drilling apparatus
EP0825396A1 (fr) * 1996-02-21 1998-02-25 Daikin Industries, Limited Refrigerateur cryogenique
FR2821410A1 (fr) * 2001-02-26 2002-08-30 Renault Joint d'etancheite, procedes pour fabriquer ce joint, et utilisation de ce joint dans un dispositif d'essuie-glace du type a balayage lineaire
WO2016091670A1 (fr) * 2014-12-08 2016-06-16 Aktiebolaget Skf Procédé de fabrication d'un joint d'étanchéité annulaire

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2804324A (en) * 1953-09-11 1957-08-27 Gen Motors Corp Seal
US3443845A (en) * 1966-06-27 1969-05-13 Mather Co Composite molded plastic articles and the method for producing same
US3719366A (en) * 1971-05-26 1973-03-06 Utex Ind Inc Heterogeneous lip-type packings
US3901517A (en) * 1972-10-11 1975-08-26 Utex Ind Inc Dynamic seal
US3957278A (en) * 1971-11-17 1976-05-18 Industriewerk Schaeffler Ohg Injection molded seal and production thereof
US4468042A (en) * 1981-11-19 1984-08-28 Utex Industries, Inc. Anti-extrusion sealing device with interlocked retainer portions

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2804324A (en) * 1953-09-11 1957-08-27 Gen Motors Corp Seal
US3443845A (en) * 1966-06-27 1969-05-13 Mather Co Composite molded plastic articles and the method for producing same
US3719366A (en) * 1971-05-26 1973-03-06 Utex Ind Inc Heterogeneous lip-type packings
US3957278A (en) * 1971-11-17 1976-05-18 Industriewerk Schaeffler Ohg Injection molded seal and production thereof
US3901517A (en) * 1972-10-11 1975-08-26 Utex Ind Inc Dynamic seal
US4468042A (en) * 1981-11-19 1984-08-28 Utex Industries, Inc. Anti-extrusion sealing device with interlocked retainer portions

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4035658A1 (de) * 1990-11-09 1992-05-14 Baedje K H Meteor Gummiwerke Streifenartiges bauteil fuer dichtungszwecke usw.
WO1992018578A1 (fr) * 1991-04-23 1992-10-29 E.I. Du Pont De Nemours And Company Joint industriel utilise dans des applications au contact de la vapeur
EP0541036A2 (fr) * 1991-11-06 1993-05-12 Skf Industrie S.P.A. Bague d'étanchéité, notamment pour paliers à roulement
EP0541036A3 (en) * 1991-11-06 1993-09-29 Skf Industrie S.P.A. Sealing shield, particularly for rolling bearings
US5269539A (en) * 1992-04-13 1993-12-14 Trw Inc. Hydraulic shaft seal
NL9300759A (nl) * 1993-05-05 1994-12-01 Skf Ind Spa Afdichtingsscherm, zoals voor wentellagers.
US5592994A (en) * 1994-12-15 1997-01-14 Jks Boyles International Inc. Propulsion seal for wire line core drilling apparatus
EP0825396A1 (fr) * 1996-02-21 1998-02-25 Daikin Industries, Limited Refrigerateur cryogenique
EP0825396A4 (fr) * 1996-02-21 2001-11-14 Daikin Ind Ltd Refrigerateur cryogenique
FR2821410A1 (fr) * 2001-02-26 2002-08-30 Renault Joint d'etancheite, procedes pour fabriquer ce joint, et utilisation de ce joint dans un dispositif d'essuie-glace du type a balayage lineaire
WO2016091670A1 (fr) * 2014-12-08 2016-06-16 Aktiebolaget Skf Procédé de fabrication d'un joint d'étanchéité annulaire
CN107208796A (zh) * 2014-12-08 2017-09-26 斯凯孚公司 环形密封件的制造方法

Also Published As

Publication number Publication date
AU5023290A (en) 1990-08-01

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