GB1371775A - Viscoelastic damper - Google Patents
Viscoelastic damperInfo
- Publication number
- GB1371775A GB1371775A GB3776173A GB3776173A GB1371775A GB 1371775 A GB1371775 A GB 1371775A GB 3776173 A GB3776173 A GB 3776173A GB 3776173 A GB3776173 A GB 3776173A GB 1371775 A GB1371775 A GB 1371775A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plates
- plate structure
- plate
- damper
- viscoelastic material
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C27/00—Rotorcraft; Rotors peculiar thereto
- B64C27/51—Damping of blade movements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/10—Constructional features of arms
- B60G2206/11—Constructional features of arms the arm being a radius or track or torque or steering rod or stabiliser end link
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Vibration Prevention Devices (AREA)
- Vibration Dampers (AREA)
- Springs (AREA)
Abstract
1371775 Springs LORD CORP 16 Aug 1971 [26 Oot 1970 13 May 1971] 37761/73 Divided out of 1371774 Heading F2S A damper for resiliently damping relative movement between two relatively movable members comprises a first plate structure having two spaced apart rigidly interconnected outer plates 56, Fig. 4, a second plate structure including at least one inner plate 52 between the plates 56, viscoelastic material 50 in the spaces between the plates 52, 56 and secured thereto, and means 70 interconnecting the outer plates 56 for preloading the material 50 to the extent permitted by spacers 76, the plate structures having respective means 53, 66 for attachment to the said members so that on relative movement thereof the viscoelastic material is deformed predominantly in shear. Alternatively, Fig. 7, the first plate structure includes plates 85, 86 bolted to a central plate 82, while the second plate structure includes plates 83, 84 bolted together. The plates 83, 84 have outwardly facing concave surfaces and the plates 85, 86 complementary convex surfaces for preventing relative transverse movement of the plates. The viscoelastic material is preferably silicone rubber, but other examples are given. The damper is particularly intended for use as a lead-lag damper in a helicopter rotor; a rotor per se is claimed in Specification 1,371,774. (see Division B7). Reference has been directed by the Comptroller to Specification 1,333,246.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US8400370A | 1970-10-26 | 1970-10-26 | |
US14295371A | 1971-05-13 | 1971-05-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1371775A true GB1371775A (en) | 1974-10-23 |
Family
ID=26770155
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3776173A Expired GB1371775A (en) | 1970-10-26 | 1971-08-16 | Viscoelastic damper |
GB3344871A Expired GB1371774A (en) | 1970-10-26 | 1971-08-16 | Rotor system having viscoelastic lead-lag damper |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3344871A Expired GB1371774A (en) | 1970-10-26 | 1971-08-16 | Rotor system having viscoelastic lead-lag damper |
Country Status (5)
Country | Link |
---|---|
CA (1) | CA934732A (en) |
DE (1) | DE2139337A1 (en) |
FR (1) | FR2111845B1 (en) |
GB (2) | GB1371775A (en) |
IT (1) | IT939400B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7607892B2 (en) | 2005-09-21 | 2009-10-27 | Eurocopter | Rotorcraft rotor with blades hinged in flap and in lag |
CN104334914A (en) * | 2012-06-27 | 2015-02-04 | 波音公司 | Damping mechanical linkage |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2127061A5 (en) * | 1971-02-22 | 1972-10-13 | Arfina | |
GB2025338B (en) * | 1978-06-02 | 1982-08-04 | Aerospatiale | Helicopterrotor |
DE3148903C2 (en) * | 1981-12-10 | 1985-05-02 | Messerschmitt-Bölkow-Blohm GmbH, 8000 München | Elastomer damping device for a rotor blade |
FR2528382A1 (en) * | 1982-06-11 | 1983-12-16 | Vibrachoc Sa | VIBRATION DAMPER AND IN PARTICULAR FREQUENCY ADAPTER FOR HELICOPTER BLADE |
FR2703414B1 (en) * | 1993-03-29 | 1995-06-23 | Hutchinson | TORQUE RECOVERY LINK. |
FR2818717B1 (en) | 2000-12-26 | 2003-03-07 | Eurocopter France | DAMPED ELASTIC LINK DEVICE AND MANUFACTURING METHOD THEREOF |
DE10342032B3 (en) | 2003-09-08 | 2005-05-25 | Trelleborg Automotive Technical Centre Gmbh | Stabilizer |
WO2015191858A1 (en) * | 2014-06-11 | 2015-12-17 | Lord Corporation | Lead-lag dampers and assemblies for an articulated rotor and methods for operation |
-
1971
- 1971-07-20 CA CA118684A patent/CA934732A/en not_active Expired
- 1971-08-06 DE DE19712139337 patent/DE2139337A1/en active Pending
- 1971-08-16 GB GB3776173A patent/GB1371775A/en not_active Expired
- 1971-08-16 GB GB3344871A patent/GB1371774A/en not_active Expired
- 1971-09-09 IT IT5278671A patent/IT939400B/en active
- 1971-10-26 FR FR7138485A patent/FR2111845B1/fr not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7607892B2 (en) | 2005-09-21 | 2009-10-27 | Eurocopter | Rotorcraft rotor with blades hinged in flap and in lag |
CN104334914A (en) * | 2012-06-27 | 2015-02-04 | 波音公司 | Damping mechanical linkage |
CN104334914B (en) * | 2012-06-27 | 2016-07-20 | 波音公司 | Damping mechanical linkage which controls |
Also Published As
Publication number | Publication date |
---|---|
FR2111845B1 (en) | 1976-02-13 |
CA934732A (en) | 1973-10-02 |
GB1371774A (en) | 1974-10-23 |
FR2111845A1 (en) | 1972-06-09 |
DE2139337A1 (en) | 1972-10-05 |
IT939400B (en) | 1973-02-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |