IT1029612B - Perfezionamento nelle disposizioni di riduzione delle vibrazioni in rotori di aeromobili ad ala rotante - Google Patents

Perfezionamento nelle disposizioni di riduzione delle vibrazioni in rotori di aeromobili ad ala rotante

Info

Publication number
IT1029612B
IT1029612B IT7453396A IT5339674A IT1029612B IT 1029612 B IT1029612 B IT 1029612B IT 7453396 A IT7453396 A IT 7453396A IT 5339674 A IT5339674 A IT 5339674A IT 1029612 B IT1029612 B IT 1029612B
Authority
IT
Italy
Prior art keywords
rotors
improvement
vibration reduction
wing aircraft
rotary wing
Prior art date
Application number
IT7453396A
Other languages
English (en)
Original Assignee
Westland Aircraft 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 Westland Aircraft Ltd filed Critical Westland Aircraft Ltd
Application granted granted Critical
Publication of IT1029612B publication Critical patent/IT1029612B/it

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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • F16F15/14—Suppression of vibrations in rotating systems by making use of members moving with the system using masses freely rotating with the system, i.e. uninvolved in transmitting driveline torque, e.g. rotative dynamic dampers
    • F16F15/1407—Suppression of vibrations in rotating systems by making use of members moving with the system using masses freely rotating with the system, i.e. uninvolved in transmitting driveline torque, e.g. rotative dynamic dampers the rotation being limited with respect to the driving means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C27/00—Rotorcraft; Rotors peculiar thereto
    • B64C27/001—Vibration damping devices
    • 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
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S416/00—Fluid reaction surfaces, i.e. impellers
    • Y10S416/50—Vibration damping features

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Vibration Dampers (AREA)
  • Vibration Prevention Devices (AREA)
IT7453396A 1973-10-09 1974-10-07 Perfezionamento nelle disposizioni di riduzione delle vibrazioni in rotori di aeromobili ad ala rotante IT1029612B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4716473A GB1468359A (en) 1973-10-09 1973-10-09 Bifilar vibration dampers

Publications (1)

Publication Number Publication Date
IT1029612B true IT1029612B (it) 1979-03-20

Family

ID=10443978

Family Applications (1)

Application Number Title Priority Date Filing Date
IT7453396A IT1029612B (it) 1973-10-09 1974-10-07 Perfezionamento nelle disposizioni di riduzione delle vibrazioni in rotori di aeromobili ad ala rotante

Country Status (6)

Country Link
US (1) US3932060A (it)
JP (1) JPS5078100A (it)
DE (1) DE2447454A1 (it)
FR (1) FR2307190A1 (it)
GB (1) GB1468359A (it)
IT (1) IT1029612B (it)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3988074A (en) * 1975-11-13 1976-10-26 United Technologies Corporation Anhedral bifilar
US4057363A (en) * 1975-11-20 1977-11-08 United Technologies Corporation Extended arm bifilar and method to eliminate second order vibration excitation
US4111386A (en) * 1976-12-09 1978-09-05 United Technologies Corporation Helicopter rotor and transmission mounting and vibration isolation system
US4550812A (en) * 1978-08-04 1985-11-05 United Technologies Corporation Fixed position, fixed frequency pendular-type vibration absorber with frequency linearization
US4218187A (en) * 1978-08-04 1980-08-19 United Technologies Corporation Constant frequency bifilar vibration absorber
US4239455A (en) * 1978-09-11 1980-12-16 Textron, Inc. Blade-mounted centrifugal pendulum
US4739679A (en) * 1986-01-23 1988-04-26 Ford Motor Company Bifilar pendulum vibration damper for automotive installation
US5495924A (en) * 1994-07-13 1996-03-05 Quiescence Engineering Corp. Half-order centrifugal pendulum vibration absorber system
FR2733483B1 (fr) * 1995-04-27 1997-07-04 Eurocopter France Dispositif d'attenuation de vibrations pour rotor d'helicoptere
DE19831156A1 (de) * 1998-07-11 2000-01-13 Freudenberg Carl Fa Drehzahladaptiver Schwingungstilger
MXPA04006381A (es) * 2004-06-28 2006-01-11 Fernando Manuel Gil Aldrete Multiplicador de torque.
US8931607B2 (en) * 2010-01-29 2015-01-13 Gm Global Technology Operations, Llc Centrifugal pendulum vibration absorber
US8813604B2 (en) * 2011-10-20 2014-08-26 Chrysler Group Llc Pendulum vibration absorber on a crankshaft
FR3010467B1 (fr) * 2013-09-10 2016-12-09 Valeo Embrayages Dispositif d'absorption de vibrations
FR3021080B1 (fr) * 2014-05-16 2020-02-21 Valeo Embrayages Dispositif d'amortissement d'oscillations de torsion
FR3021082B1 (fr) 2014-05-16 2016-05-13 Valeo Embrayages Dispositif d'amortissement d'oscillations de torsion
FR3021081A1 (fr) * 2014-05-16 2015-11-20 Valeo Embrayages Dispositif d'amortissement d'oscillations de torsion
US10577089B2 (en) 2017-05-03 2020-03-03 Sikorsky Aircraft Corporation Integrated bifilar system that absorbs vibrations in both vertical and in-plane directions
CN110939673B (zh) * 2019-12-04 2021-10-08 上海大学 一种耦合分段刚度的非线性减振装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3540809A (en) * 1968-09-20 1970-11-17 United Aircraft Corp Vibration damped helicopter rotor
GB1443148A (en) * 1972-10-19 1976-07-21 Westland Aircraft Ltd Bifilar vibration dampers

Also Published As

Publication number Publication date
US3932060A (en) 1976-01-13
DE2447454A1 (de) 1975-04-17
FR2307190A1 (fr) 1976-11-05
FR2307190B1 (it) 1981-02-06
JPS5078100A (it) 1975-06-25
GB1468359A (en) 1977-03-23

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