FR2959790A1 - VISCOELASTIC CYLINDRICAL SHOCK ABSORBER. - Google Patents

VISCOELASTIC CYLINDRICAL SHOCK ABSORBER. Download PDF

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Publication number
FR2959790A1
FR2959790A1 FR1001959A FR1001959A FR2959790A1 FR 2959790 A1 FR2959790 A1 FR 2959790A1 FR 1001959 A FR1001959 A FR 1001959A FR 1001959 A FR1001959 A FR 1001959A FR 2959790 A1 FR2959790 A1 FR 2959790A1
Authority
FR
France
Prior art keywords
cylindrical
viscoelastic
axis
conical
damper
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.)
Granted
Application number
FR1001959A
Other languages
French (fr)
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FR2959790B1 (en
Inventor
Eduardo Beltran
Antonio Richard De
Thibaut Buffin
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.)
Hutchinson SA
Original Assignee
Hutchinson SA
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 Hutchinson SA filed Critical Hutchinson SA
Priority to FR1001959A priority Critical patent/FR2959790B1/en
Priority to PCT/IB2011/051971 priority patent/WO2011138745A1/en
Publication of FR2959790A1 publication Critical patent/FR2959790A1/en
Application granted granted Critical
Publication of FR2959790B1 publication Critical patent/FR2959790B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • F16F1/38—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type
    • F16F1/393—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type with spherical or conical sleeves
    • F16F1/3935—Conical sleeves

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

L'Invention est relative à un amortisseur cylindrique rotatif viscoélastique comportant une pièce cylindrique interne ayant un contour externe cylindrique ou conique et une pièce cylindrique externe ayant un contour interne cylindrique ou conique, ces deux pièces cylindriques ayant un même axe UZ, la pièce cylindrique externe comportant une bride d'entraînement destinée à la fixation d'une bielle générant des mouvements de torsion autour dudit axe UZ, caractérisé en ce qu'il comporte au moins un élément viscoélastique comprenant au moins une couche (3) de matériau viscoélastique cylindrique ou faiblement conique coaxiale auxdites pièces cylindriques (1, 2) et inclinés par rapport à l'axe UZ d'un angle α compris en valeur absolue entre 0° et 45°, et de préférence entre 0° et 30°, le matériau viscoélastique ayant un coefficient d'amortissement tgδ ≥ 0,2 et de préférence compris entre 0.3 et 1. De la sorte, il assure simultanément les fonctions de raideur, d'amortisseur et de palier.The invention relates to a viscoelastic rotary cylindrical damper comprising an internal cylindrical piece having a cylindrical or conical outer contour and an outer cylindrical piece having a cylindrical or conical inner contour, these two cylindrical pieces having the same axis UZ, the outer cylindrical piece. comprising a drive flange for fastening a connecting rod generating torsional movements about said UZ axis, characterized in that it comprises at least one viscoelastic element comprising at least one layer (3) of cylindrical viscoelastic material or weakly conical coaxial with said cylindrical pieces (1, 2) and inclined with respect to the axis UZ by an angle α included in absolute value between 0 ° and 45 °, and preferably between 0 ° and 30 °, the viscoelastic material having a damping coefficient tgδ ≥ 0.2 and preferably between 0.3 and 1. In this way, it simultaneously performs the functions of raid eur, damper and bearing.

FR1001959A 2010-05-06 2010-05-06 VISCOELASTIC CYLINDRICAL SHOCK ABSORBER. Expired - Fee Related FR2959790B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR1001959A FR2959790B1 (en) 2010-05-06 2010-05-06 VISCOELASTIC CYLINDRICAL SHOCK ABSORBER.
PCT/IB2011/051971 WO2011138745A1 (en) 2010-05-06 2011-05-04 Viscoelastic cylindrical shock absorber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1001959A FR2959790B1 (en) 2010-05-06 2010-05-06 VISCOELASTIC CYLINDRICAL SHOCK ABSORBER.

Publications (2)

Publication Number Publication Date
FR2959790A1 true FR2959790A1 (en) 2011-11-11
FR2959790B1 FR2959790B1 (en) 2013-04-26

Family

ID=43413624

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1001959A Expired - Fee Related FR2959790B1 (en) 2010-05-06 2010-05-06 VISCOELASTIC CYLINDRICAL SHOCK ABSORBER.

Country Status (2)

Country Link
FR (1) FR2959790B1 (en)
WO (1) WO2011138745A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2050235A1 (en) * 1969-07-04 1971-04-02 Sud Aviation Expanded polystyrene shock absorbant - instrument mounting for space craft
FR2818717A1 (en) * 2000-12-26 2002-06-28 Eurocopter France Elastic shock absorbing coupling e.g. for helicopter rotor blades has viscoelastic sleeves between inner, outer and intermediate rigid cylinders

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2197741B1 (en) 2007-09-04 2015-03-04 Lord Corporation Helicopter aircraft vehicle rotor damper

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2050235A1 (en) * 1969-07-04 1971-04-02 Sud Aviation Expanded polystyrene shock absorbant - instrument mounting for space craft
FR2818717A1 (en) * 2000-12-26 2002-06-28 Eurocopter France Elastic shock absorbing coupling e.g. for helicopter rotor blades has viscoelastic sleeves between inner, outer and intermediate rigid cylinders

Also Published As

Publication number Publication date
FR2959790B1 (en) 2013-04-26
WO2011138745A1 (en) 2011-11-10

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