WO1996016277A1 - Ressort belleville - Google Patents

Ressort belleville Download PDF

Info

Publication number
WO1996016277A1
WO1996016277A1 PCT/AU1995/000783 AU9500783W WO9616277A1 WO 1996016277 A1 WO1996016277 A1 WO 1996016277A1 AU 9500783 W AU9500783 W AU 9500783W WO 9616277 A1 WO9616277 A1 WO 9616277A1
Authority
WO
WIPO (PCT)
Prior art keywords
belleville spring
cavity
mechanical assembly
spring
coating
Prior art date
Application number
PCT/AU1995/000783
Other languages
English (en)
Inventor
Timothy Shane Barrett
Original Assignee
J.C. Ludowici And Son Ltd.
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.C. Ludowici And Son Ltd. filed Critical J.C. Ludowici And Son Ltd.
Priority to AU38987/95A priority Critical patent/AU694279B2/en
Publication of WO1996016277A1 publication Critical patent/WO1996016277A1/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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B43/00—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/32—Belleville-type springs

Definitions

  • This invention relates to belleville springs and in particular to belleville springs of the type having an elastomeric coating.
  • the invention also relates to mechanical assemblies incorporating belleville springs.
  • a belleville spring is a spring configured as a dished washer. It is common for such springs to comprise an internal spring structure known as a barespring and an elastomeric coating on the barespring. The elastomeric coating provides a seal at the interface between the belleville spring and machine elements against which the belleville spring acts.
  • coated belleville spring acts between a sleeve fitted onto a shaft and a housing which is mounted on the sleeve for rotation therewith while being movable axially with respect to the shaft.
  • the belleville spring is accommodated in circumferential recesses within the housing and the sleeve and biases the housing in one direction of such axial movement.
  • the mechanical seal is installed such that there is a prescribed preload on the belleville spring. It has been found that when the coated belleville spring is installed with the prescribed preload, the elastomeric coating is squeezed or otherwise distorted radially, the result of which is that stresses are induced in the coating. These stresses have an influence on the extent of preload exerted by the belleville spring.
  • the preload has two components, one being the force exerted by the barespring and the other being the force exerted by stresses induced in the elastomeric coating. This is undesirable as there is relaxation in the elastomeric material over a period of time, with the result that there is a loss in the preload.
  • the invention provides a mechanical assembly comprising a coated belleville spring having a barespring encapsulated in an elastomeric coating, and an element having a recess for receiving the coated belleville spring, characterised in that there is provided means for accommodating distortion of the elastomeric material of the coated belleville spring while under load.
  • the means for accommodating distortion of the elastomeric material may comprise a cavity.
  • the cavity provided to accommodate distortion of the elastomeric material may be provided in the coated belleville spring or in the recess of the element.
  • At least one of such cavities may be in the coated belleville spring and at least one other of the cavities may be in the element.
  • the cavity or at least one of the cavities, is in the element, it may comprise a circumferential groove formed in the element.
  • the groove may be formed in the element in the region thereof adjacent either the outer or the inner periphery of the belleville spring. Indeed, there may be two grooves, one adjacent the inner periphery and the other adjacent the outer periphery.
  • cavities in the element may in another arrangement comprise depressions disposed in spaced apart relationship.
  • the cavity may be internally within the spring or it may open onto the exterior thereof.
  • the cavity or at least one of the cavities, is in the coating, it may comprise a circumferential groove formed in the coating.
  • the groove may be formed in either the outer or the inner periphery of the coating. Indeed, there may be two grooves, one formed in the inner periphery and the other formed in the outer periphery.
  • cavities in the coating may in another arrangement comprise depressions disposed in spaced apart relationship.
  • the element may comprise part of a mechanical seal.
  • the invention also provides a belleville spring having an elastomeric coating, the coating being provided with at least one cavity to accommodate distortion of the elastomeric material.
  • the cavity may be of any suitable form.
  • the cavity may exist internally within the coated belleville spring in which case it may comprise an internal void, or it may open onto the exterior thereof, or there may be a combination of internal and external cavities.
  • the cavity may comprise a circumferential groove formed in the elastomeric coating of the spring.
  • the circumferential groove may be provided at the outer and or inner periphery of the spring.
  • the cavity is an internal cavity, it may be provided within the ( encapsulated barespring.
  • the invention still further provides a mechanical assembly fitted with a belleville spring as set forth hereinbefore.
  • the invention still further provides a mechanical assembly comprising a belleville spring and an element having a recess in which the spring is received, the coated belleville spring comprising a barespring encapsulated in an elastomeric coating, and a cavity being provided to accommodate distortion of the elastomeric material under load.
  • the invention still further provides a machine element having a recess to receive a belleville spring having an elastomeric coating, the recess being configured to accommodate distortion of the elastomeric material upon loading of the spring.
  • the configuration of the recess may include at least one cavity in the face of the recess which confronts the spring.
  • the cavity may comprise a circumferential recess in the groove.
  • Fig. 1 is a fragmentary sectional view of part of a mechanical seal fitted with a coated belleville spring
  • Fig. 2 is a sectional perspective view of the belleville spring
  • Fig. 3 is a schematic fragmentary view of the coated belleville spring in position between a sleeve and a housing both of which form part of the mechanical seal, the arrangement being shown prior to loading of the spring;
  • Fig. 4 is a view similar to Fig. 3 with the exception that the arrangement is shown in the condition where the spring is loaded such that the elastomeric material is distorted;
  • Fig. 5 is a schematic fragmentary view of a belleville spring according to a second embodiment
  • Fig. 6 is an elevational view of a mechanical seal according to a third embodiment
  • Fig. 7 is a cross-sectional view of the belleville spring of Fig. 6;
  • Fig. 8 is an elevational view of a belleville spring according to a fourth embodiment
  • Fig. 9 is a cross-sectional view of the spring of Fig. 8;
  • Fig. 10 is an elevational view of a sleeve forming part of a mechanical seal according to a fifth embodiment
  • Fig. 11 is an elevational view of a sleeve forming part of a mechanical seal according to a sixth embodiment.
  • a mechanical seal 11 comprising a sleeve 13 adapted to be mounted onto a shaft (not shown) of a pump and to be secured thereon.
  • a housing 15 is located about the sleeve. While not shown in the drawings, the housing 15 is connected to the sleeve 13 10 so as to undergo rotation with the sleeve and to also be capable of limited axial movement relative to the sleeve.
  • the housing supports a sealing element 17.
  • a biasing means in the form of a coated belleville spring 21 operates between the housing 15 and the sleeve 13.
  • the spring 21 serves to bias the housing 15 15 in a direction which maintains the sealing element 17 in sealing engagement with a further sealing element (not shown).
  • the belleville spring 21 is of annular configuration and comprises a barespring 23 configured as a dished washer so as to be of conventional form.
  • the 20 barespring 23 is encapsulated in a coating 25 of elastomeric material such as Neoprene or Viton.
  • the coating is provided with a thickened face section 26.
  • the belleville spring 21 has a radially inner end 27 which is received in an outwardly facing circumferential recess 29 in the sleeve 13.
  • the radially outer 25 end 31 of the belleville spring 21 is received within an inwardly facing circumferential recess 33 formed in the housing 15.
  • a cavity 35 in the form of a circumferential groove is provided within the circumferential recess 29.
  • groove is provided within the circumferential recess 33.
  • the grooves 35 and 37 respectively are arranged to accommodate distortion of the elastomeric material as it squeezed when the belleville spring is under load.
  • the grooves provide space into which part of the elastomeric material can move when distorting under load. This reduces the amount of stress induced in the elastomeric
  • Figs. 3 and 4 of the drawings illustrates part of the elastomeric coating 25 occupying spaces provided by the grooves 35, 37.
  • Figs. 5 of the drawings where the belleville spring 21 is provided with a circumferential groove 41 on the radially outer periphery thereof and a circumferential groove 42 on the radially inner periphery thereof.
  • the grooves 41 and 42 provides a space which accepts distorting elastomeric material when under load thereby reducing stresses induced in the elastomeric material.
  • Figs. 6 and 7 of the drawings illustrates an arrangement where the radially inner periphery of the belleville seal is provided with cavities in the form of a plurality of circumferentially spaced recesses 43 which provide space for accommodating distortion.of the elastomeric material.
  • FIGs. 8 and 9 of the drawings illustrate a further embodiment, which is somewhat similar to the embodiment shown in Figs. 6 and 7, except for the configuration of the recesses 43.
  • the cavity 35 in the sleeve 13 for accommodating distorting elastomeric material is provided by the circumferential groove.
  • Fig. 10 illustrates an alternative embodiment in which such cavities are provided by a plurality of circumferentially spaced depressions 45 provided in the recess.
  • Fig. 11 illustrates an embodiment similar to Fig. 10 with the exception that the depressions 45 are of a different configuration.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Springs (AREA)

Abstract

L'invention concerne un assemblage d'éléments mécaniques (11), tel qu'une garniture mécanique d'étanchéité, comprenant un ressort Belleville revêtu (21) pourvu d'un ressort nu (23) enveloppé dans un revêtement en élastomère (25). L'assemblage comprend en outre un élément (13, 15) doté d'un creux (29, 33) permettant de loger le ressort Belleville revêtu. Des cavités (35, 37) sont également prévues pour compenser les déformations du revêtement en élastomère enveloppant le ressort Belleville lorsque celui-ci est en état de contrainte. En compensant les déformations, on diminue ainsi les tensions exercées sur le revêtement (25).
PCT/AU1995/000783 1994-11-24 1995-11-24 Ressort belleville WO1996016277A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU38987/95A AU694279B2 (en) 1994-11-24 1995-11-24 Belleville spring

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPM9647A AUPM964794A0 (en) 1994-11-24 1994-11-24 Belleville spring
AUPM9647 1994-11-24

Publications (1)

Publication Number Publication Date
WO1996016277A1 true WO1996016277A1 (fr) 1996-05-30

Family

ID=3784156

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1995/000783 WO1996016277A1 (fr) 1994-11-24 1995-11-24 Ressort belleville

Country Status (2)

Country Link
AU (1) AUPM964794A0 (fr)
WO (1) WO1996016277A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2187083A1 (fr) * 2008-11-18 2010-05-19 Carl Freudenberg KG Rondelle conique
DE102012107380A1 (de) * 2012-08-10 2014-05-22 Dionex Softron Gmbh Schaltventil, insbesondere Hochdruck-Schaltventil für die Hochleistungsflüssigkeitschromatographie
US9063114B2 (en) 2012-08-10 2015-06-23 Dionex Softron Gmbh Switching valve for liquid chromatography
CN104832452A (zh) * 2015-05-05 2015-08-12 四川大禹机械密封件制造有限公司 机械密封装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB757225A (en) * 1953-11-13 1956-09-19 British Messier Ltd Improvements in or relating to fluid pressure seals for pistons, stuffing boxes and the like
DE1945234A1 (de) * 1969-09-06 1971-03-11 Luk Lamellen & Kupplungsbau Tellerfeder
GB1226650A (fr) * 1968-10-17 1971-03-31
US4306727A (en) * 1980-07-24 1981-12-22 Reed Rock Bit Company Dynamic seal for rolling cutter drill bit
AU5391486A (en) * 1985-02-01 1986-08-26 J.C. Ludowici & Son Limited Mechanical seal

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB757225A (en) * 1953-11-13 1956-09-19 British Messier Ltd Improvements in or relating to fluid pressure seals for pistons, stuffing boxes and the like
GB1226650A (fr) * 1968-10-17 1971-03-31
DE1945234A1 (de) * 1969-09-06 1971-03-11 Luk Lamellen & Kupplungsbau Tellerfeder
US4306727A (en) * 1980-07-24 1981-12-22 Reed Rock Bit Company Dynamic seal for rolling cutter drill bit
AU5391486A (en) * 1985-02-01 1986-08-26 J.C. Ludowici & Son Limited Mechanical seal

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2187083A1 (fr) * 2008-11-18 2010-05-19 Carl Freudenberg KG Rondelle conique
DE102008058089B4 (de) * 2008-11-18 2015-03-19 Carl Freudenberg Kg Tellerfeder
DE102012107380A1 (de) * 2012-08-10 2014-05-22 Dionex Softron Gmbh Schaltventil, insbesondere Hochdruck-Schaltventil für die Hochleistungsflüssigkeitschromatographie
US9063114B2 (en) 2012-08-10 2015-06-23 Dionex Softron Gmbh Switching valve for liquid chromatography
US9297790B2 (en) 2012-08-10 2016-03-29 Dionex Softron Gmbh Switching valve for liquid chromatography
US9329157B2 (en) 2012-08-10 2016-05-03 Dionex Softron Gmbh Switching valve for liquid chromatography
US9400265B2 (en) 2012-08-10 2016-07-26 Dionex Softron Gmbh Switching valve for high-performance liquid chromatography
DE102012107380B4 (de) * 2012-08-10 2017-03-09 Dionex Softron Gmbh Schaltventil, insbesondere Hochdruck-Schaltventil für die Hochleistungsflüssigkeitschromatographie
CN104832452A (zh) * 2015-05-05 2015-08-12 四川大禹机械密封件制造有限公司 机械密封装置

Also Published As

Publication number Publication date
AUPM964794A0 (en) 1994-12-15

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