IL57942A - Constant natural frequency bifilar vibration absorber for helicopters - Google Patents
Constant natural frequency bifilar vibration absorber for helicoptersInfo
- Publication number
- IL57942A IL57942A IL57942A IL5794279A IL57942A IL 57942 A IL57942 A IL 57942A IL 57942 A IL57942 A IL 57942A IL 5794279 A IL5794279 A IL 5794279A IL 57942 A IL57942 A IL 57942A
- Authority
- IL
- Israel
- Prior art keywords
- helicopters
- natural frequency
- vibration absorber
- constant natural
- bifilar vibration
- Prior art date
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
- F16F15/145—Masses mounted with play with respect to driving means thus enabling free movement over a limited range
-
- 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)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Vibration Prevention Devices (AREA)
- Catching Or Destruction (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Toys (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/931,034 US4218187A (en) | 1978-08-04 | 1978-08-04 | Constant frequency bifilar vibration absorber |
Publications (1)
Publication Number | Publication Date |
---|---|
IL57942A true IL57942A (en) | 1982-07-30 |
Family
ID=25460125
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IL57942A IL57942A (en) | 1978-08-04 | 1979-07-31 | Constant natural frequency bifilar vibration absorber for helicopters |
Country Status (8)
Country | Link |
---|---|
US (1) | US4218187A (ja) |
EP (1) | EP0008303A1 (ja) |
JP (1) | JPS5525692A (ja) |
AU (1) | AU523834B2 (ja) |
BR (1) | BR7904971A (ja) |
CA (1) | CA1111400A (ja) |
IL (1) | IL57942A (ja) |
NO (1) | NO146460C (ja) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2181513B (en) * | 1985-10-03 | 1989-09-13 | Ford Motor Co | Automotive crankshaft bifilar pendulum vibration damper |
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 |
DE19604160C1 (de) * | 1996-02-06 | 1997-05-28 | Freudenberg Carl Fa | Drehzahladaptiver Tilger |
DE19831160A1 (de) * | 1998-07-11 | 2000-01-13 | Freudenberg Carl Fa | Drehzahladaptiver Schwingungstilger |
FR2808256B1 (fr) | 2000-04-27 | 2002-08-30 | Eurocopter France | Rotor avec antivibreur de tete a pendules verticaux |
US6746005B1 (en) | 2001-10-04 | 2004-06-08 | The United States Of America As Represented By The Secretary Of The Navy | Constant natural frequency passive-active mount |
US8162606B2 (en) | 2004-08-30 | 2012-04-24 | Lord Corporation | Helicopter hub mounted vibration control and circular force generation systems for canceling vibrations |
US8267652B2 (en) * | 2004-08-30 | 2012-09-18 | Lord Corporation | Helicopter hub mounted vibration control and circular force generation systems for canceling vibrations |
WO2006135405A2 (en) | 2004-08-30 | 2006-12-21 | Lord Corporation | Helicopter vibration control system and rotary force generator for canceling vibrations |
US7722322B2 (en) * | 2004-08-30 | 2010-05-25 | Lord Corporation | Computer system and program product for controlling vibrations |
US8435002B2 (en) * | 2004-08-30 | 2013-05-07 | Lord Corporation | Helicopter vibration control system and rotating assembly rotary forces generators for canceling vibrations |
WO2009055007A2 (en) * | 2007-10-25 | 2009-04-30 | Lord Corporation | Distributed active vibration control systems and rotary wing aircraft with suppressed vibrations |
US8403643B2 (en) * | 2008-03-20 | 2013-03-26 | Sikorsky Aircraft Corporation | Dual frequency hub mounted vibration suppressor system |
DE102008051607A1 (de) | 2008-10-14 | 2010-04-15 | Daimler Ag | Drehschwingungstilger |
FR2959484B1 (fr) * | 2010-04-30 | 2012-11-09 | Eurocopter France | Dispositif pour reduire les vibrations engendrees par un rotor de sustentation d'un giravion, et moyeu d'un rotor muni d'un tel dispositif. |
US8813604B2 (en) * | 2011-10-20 | 2014-08-26 | Chrysler Group Llc | Pendulum vibration absorber on a crankshaft |
CN106233033B (zh) * | 2014-04-17 | 2019-05-28 | 舍弗勒技术股份两合公司 | 离心力摆 |
US10295014B2 (en) * | 2015-11-24 | 2019-05-21 | Ford Global Technologies, Llc | Robust pendulum crank bumper |
WO2017159831A1 (ja) * | 2016-03-16 | 2017-09-21 | アイシン・エィ・ダブリュ株式会社 | 振動減衰装置 |
US10577089B2 (en) | 2017-05-03 | 2020-03-03 | Sikorsky Aircraft Corporation | Integrated bifilar system that absorbs vibrations in both vertical and in-plane directions |
FR3069604B1 (fr) * | 2017-07-26 | 2019-08-23 | Valeo Embrayages | Dispositif d’amortissement pendulaire assoupli |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE407592A (ja) * | 1932-04-07 | |||
CH175420A (de) * | 1935-01-07 | 1935-02-28 | Raymond Sarazin Raoul Roland | Einrichtung zur Dämpfung von Schwingungen. |
US2306959A (en) * | 1939-10-19 | 1942-12-29 | Continental Aviat & Eng Corp | Crankshaft dynamic balancing means |
US2353681A (en) * | 1939-11-03 | 1944-07-18 | United Aircraft Corp | Propeller hub damper |
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 |
GB1468359A (en) * | 1973-10-09 | 1977-03-23 | Westland Aircraft Ltd | Bifilar vibration dampers |
-
1978
- 1978-08-04 US US05/931,034 patent/US4218187A/en not_active Expired - Lifetime
-
1979
- 1979-07-12 CA CA000331688A patent/CA1111400A/en not_active Expired
- 1979-07-31 IL IL57942A patent/IL57942A/xx not_active IP Right Cessation
- 1979-08-02 AU AU49509/79A patent/AU523834B2/en not_active Ceased
- 1979-08-02 EP EP79930015A patent/EP0008303A1/en not_active Withdrawn
- 1979-08-02 BR BR7904971A patent/BR7904971A/pt not_active IP Right Cessation
- 1979-08-02 NO NO792534A patent/NO146460C/no unknown
- 1979-08-03 JP JP9980579A patent/JPS5525692A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
EP0008303A1 (en) | 1980-02-20 |
BR7904971A (pt) | 1980-05-06 |
JPS6238200B2 (ja) | 1987-08-17 |
AU523834B2 (en) | 1982-08-19 |
CA1111400A (en) | 1981-10-27 |
AU4950979A (en) | 1980-02-07 |
JPS5525692A (en) | 1980-02-23 |
NO146460C (no) | 1982-10-06 |
NO792534L (no) | 1980-02-05 |
US4218187A (en) | 1980-08-19 |
NO146460B (no) | 1982-06-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
RH | Patent void |