WO1997038256A1 - Procede de serrage - Google Patents

Procede de serrage Download PDF

Info

Publication number
WO1997038256A1
WO1997038256A1 PCT/AU1997/000223 AU9700223W WO9738256A1 WO 1997038256 A1 WO1997038256 A1 WO 1997038256A1 AU 9700223 W AU9700223 W AU 9700223W WO 9738256 A1 WO9738256 A1 WO 9738256A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
pipe
sleeve
elastomeric member
cavity
Prior art date
Application number
PCT/AU1997/000223
Other languages
English (en)
Inventor
David Monaghan
Gary Robert Dickenson
Original Assignee
David Monaghan
Gary Robert Dickenson
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 David Monaghan, Gary Robert Dickenson filed Critical David Monaghan
Priority to AU22811/97A priority Critical patent/AU2281197A/en
Publication of WO1997038256A1 publication Critical patent/WO1997038256A1/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
    • F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
    • F16J15/184—Tightening mechanisms
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00—Joints with sleeve or socket
    • F16L21/02—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings
    • F16L21/04—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings in which sealing rings are compressed by axially-movable members
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00—Joints with sleeve or socket
    • F16L21/08—Joints with sleeve or socket with additional locking means

Definitions

  • CLAMPING METHOD This invention relates to a method of application of pressure to a surface, or surfaces, such as to or across an interface between two bodies that are to be clamped or bonded against relative movement across the line of pressure, and/or which are required to form a seal against flow over the interface, or where a seal or packing is required between two relatively movable bodies such as a shaft in a bearing or housing.
  • the invention also relates to members clamped by the method.
  • An object of the invention is to distribute interfacial forces between two bodies so as to reduce localised and potentially damaging pressures.
  • Another object is to enhance the effective friction and/or sealing effect between the bodies.
  • Another object is to enable predetermination of an effective interface over which frictional and/or sealing pressures are to act.
  • a further object is to provide apparatus fitted with clamps, seals, bonding, packing etc. representing various applications for the principles of the invention.
  • a method of clamping or sealing a sleeve to a shaft or pipe including the steps of providing a cavity between the outer surface of said shaft or pipe and the inner surface of said sleeve, inserting an elastomeric member into said cavity, compressing said elastomeric member with a piston member to form a closed chamber in said cavity to such an extent to compress the elastomeric member into firm contact with said shaft or pipe and locking said piston member in that position to prevent opening of said closed chamber.
  • elastomeric and “rubber” include rubber and other natural and synthetic (or partly synthetic) substances having properties akin to rubber, including a hardening under sufficient pressure to what is substantially a solid, and possibly returning to, or substantially to, its former state upon release of the pressure.
  • the chamber is advantageously formed so as to direct on to an appropriate surface or surfaces at least a substantial part of the total forces due to compression of the elastomeric member.
  • Fig. 1 is a crocs-sectional view of a part of a shaft with a sleeve to be secured thereto by the method according to the invention and showing the initial assembly of components;
  • Fig. 2 is a similar view to that of Fig. 1 showing the first stage of compression of the elastomeric member
  • Fig. 3 is a similar view to that of Fig. 2 showing the second stage of compression of the elastomeric member
  • Fig. 4 is a similar view to that of Fig. 3 showing the third stage of compression of the elastomeric member.
  • Fig. 5 is a similar view to that of Fig. 4 showing the final stage of compression of the elastomeric member and locking thereof;
  • FIG. 1 to 5 in more detail there is shown a cylindrical shaft or pipe 10 or first body (only a portion of which is shown) and a cylindrical sleeve 12 or second body which is to be permanently secured thereto using the method of the invention.
  • a chamber or cavity 14 is formed between shaft 10 and sleeve 12 in which a ring-like elastomeric member 16 is inserted.
  • a recess in sleeve 1 2 forms cavity 14 but a recess coul 1 " * be formed in shaft or pipe 10 or both.
  • Member 16 in this embodiment hds a rounded end 22 or D-shaped cross-section.
  • Chamber 14 is preferably tapered at one end by conical section 1 8.
  • FIG. 1 it is seen that piston 20, in the first part of its travel to the left indicated by distance 24, pushes the insert 1 6 to the position shown in Fig. 2 . Insert 16 abuts conical section 18 and has gone as far as it can without deformation. The next part of the movement of piston 20, ie over the distance shown as 26, causes the insert material 1 6 to deform and eventually to fill chamber 14, as shown in Fig. 3.
  • piston 20 may, under sufficient pressure, move further to the left by the distance shown as 28, compressing the elastomeric material 1 6 and causing it to harden effectively to a solid.
  • piston 20 may be locked by pins 30,32 and the external force removed, as shown in Fig. 5.
  • Pin 32 is optional as only one pin is needed to hold insert 16 in place.
  • Pin 30 may, for example, be a grub screw which is inserted through a drill hole in outer wall of sleeve 12. Pin 30 may be replaced by a circlip at the end of piston 20 or substituted by any other form of locking means.
  • the type of locking means is not critical to the operation of the invention.
  • the insert 1 6 remains solid in the pressure chamber 14, although it may revert to its normal rubbery state if the chamber 14 is allowed to expand eg by unlocking the piston 20 by removal of pins 30,32.
  • the leading portion 22 of insert 16 may be convexly-shaped as shown in order to facilitate entry into a forward part of the chamber 14 so shaped as to deflect the rubber into firm contact with the relevant surface portion of shaft 10.
  • the shape illustrated is a converging or wedge-shaped, and the "horizontal" movement of the rubber is converted into a "vertically downward” movement by the inclined plane effect of the conical section 1 8 of sleeve 12 as shown in Fig. 2. It will be understood that though the preferred embodiment is described with reference to circular components the shaft 10 and sleeve 12 is not so limited. These components may be square or any other desired cross-section.
  • the invention may find application to many forms of apparatus wherein clamping, sealing, bonding or other interaction is required between two bodies or surfaces.
  • Examples are tube expanders, couplings and other fittings, pipe swaging, pipe plugs, couplings and the like, bearing/seal assemblies, valve stem assemblies, bolt seals, wall anchors, and vessel closures.
  • the rubber in not all situations must the rubber be compressed to absolute solidification. In some applications, such as where merely sealing pressures are required or suffice, it may be desirable to reduce or even minimise rubber compression.
  • the invention can provide an efficient seal or packing between two relatively movable surfaces.
  • the first body 10 may be regarded as moving toward the viewer, relatively to the second body 12 and/or insert 16, the latter being potentially a seal - after the manner of an "O-ring".
  • the rubber could be left, and the system locked, in the condition shown in Fig. 3, or very slightly compressed to a condition between those represented by Figs. 3 and 4. Further compression/solidification of the rubber could act as a brake upon the bodies' relative movement.
  • the insert 16 may be provided with a cover or lining, such as of Teflon (Registered Trade Mark) or asbestos.
  • a cover or lining such as of Teflon (Registered Trade Mark) or asbestos.
  • the shape of the pressure chamber 14 need not be critical, however it is preferable for the opposite walls to converge gradually in the direction in which the piston 20 advances. In this way an "inclined plane" effect may give a substantial mechanical advantage, so that a relatively small force on the piston 20 will force the rubber over a relatively large surface area where its effect will be greatest.
  • a movable piston 20 is only one way of providing a variable-volume pressure chamber.
  • the "piston” might be an integral part of eg the first body, and the volume of the pressure chamber reduced by a relative movement of the second body to the right.
  • FIG. 1 to 5 are quite general in illustrating the invention whether applied to a flat or curved surface, endless or otherwise. Flat members may be joined together by applying compression forces as shown by arrows 34,36.
  • the form of the pressure chamber must be such as to direct a substantial component of the rubber's compression normally on to the relevant surface or surfaces, which may mean that the chamber must be sufficiently retentive of pressure to avoid substantial lateral extrusion of the rubber ie in the direction of viewing Figs. 1 to 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gasket Seals (AREA)

Abstract

L'invention concerne un procédé de serrage ou de scellement d'un manchon (12) sur un arbre ou tuyau (10), comprenant les étapes consistant à ménager une cavité (14) entre la surface extérieure de l'arbre ou du tuyau (10) et la surface intérieure du manchon (12), à insérer un élément élastomère (16) dans cette cavité, à comprimer cet élément au moyen d'un piston (20) afin de former une chambre fermée (14), cette compression s'effectuant de manière à ce que ledit élément (16) entre fermement en contact avec l'arbre ou le tuyau (10), et enfin à bloquer le piston (20) dans cette position afin d'empêcher l'ouverture de la chambre fermée (14).
PCT/AU1997/000223 1996-04-04 1997-04-04 Procede de serrage WO1997038256A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU22811/97A AU2281197A (en) 1996-04-04 1997-04-04 Clamping method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPN9118 1996-04-04
AUPN9118A AUPN911896A0 (en) 1996-04-04 1996-04-04 Improvements in or relating to the application of pressure over a surface

Publications (1)

Publication Number Publication Date
WO1997038256A1 true WO1997038256A1 (fr) 1997-10-16

Family

ID=3793432

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1997/000223 WO1997038256A1 (fr) 1996-04-04 1997-04-04 Procede de serrage

Country Status (2)

Country Link
AU (1) AUPN911896A0 (fr)
WO (1) WO1997038256A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU6926574A (en) * 1974-05-22 1974-10-17 British Steel Corporation Self-anchorable pipe joint
AU5472673A (en) * 1972-04-24 1974-10-24 Schwarz, W. electrically INSULATING TUBE COUPLING
DE2507085A1 (de) * 1975-02-19 1976-09-02 Daimler Benz Ag Verschiebbare rohrverbindung
EP0063452A1 (fr) * 1981-04-16 1982-10-27 Keystone International, Inc. Presse-étoupe
US4703937A (en) * 1985-11-21 1987-11-03 Mte Hydraulics, Inc. Self-venting seal assembly for relatively movable members
US4725082A (en) * 1986-12-01 1988-02-16 The Pipe Line Development Company Coupling
GB2200180A (en) * 1987-01-23 1988-07-27 Fip Formatura Inienzione Poli Pipe coupling

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU5472673A (en) * 1972-04-24 1974-10-24 Schwarz, W. electrically INSULATING TUBE COUPLING
AU6926574A (en) * 1974-05-22 1974-10-17 British Steel Corporation Self-anchorable pipe joint
DE2507085A1 (de) * 1975-02-19 1976-09-02 Daimler Benz Ag Verschiebbare rohrverbindung
EP0063452A1 (fr) * 1981-04-16 1982-10-27 Keystone International, Inc. Presse-étoupe
US4703937A (en) * 1985-11-21 1987-11-03 Mte Hydraulics, Inc. Self-venting seal assembly for relatively movable members
US4725082A (en) * 1986-12-01 1988-02-16 The Pipe Line Development Company Coupling
GB2200180A (en) * 1987-01-23 1988-07-27 Fip Formatura Inienzione Poli Pipe coupling

Also Published As

Publication number Publication date
AUPN911896A0 (en) 1996-05-02

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