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GB1243821A - Improvements in rotors for rotary wing aircraft - Google Patents

Improvements in rotors for rotary wing aircraft

Info

Publication number
GB1243821A
GB1243821A GB47216/68A GB4721668A GB1243821A GB 1243821 A GB1243821 A GB 1243821A GB 47216/68 A GB47216/68 A GB 47216/68A GB 4721668 A GB4721668 A GB 4721668A GB 1243821 A GB1243821 A GB 1243821A
Authority
GB
United Kingdom
Prior art keywords
bearing
stirrup
blade
bearings
laminated
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
Application number
GB47216/68A
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.)
Airbus Defence and Space GmbH
Original Assignee
Messerschmitt Bolkow Blohm AG
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
Priority claimed from DE19671531376 external-priority patent/DE1531376A1/en
Application filed by Messerschmitt Bolkow Blohm AG filed Critical Messerschmitt Bolkow Blohm AG
Publication of GB1243821A publication Critical patent/GB1243821A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C27/00—Rotorcraft; Rotors peculiar thereto
    • B64C27/32—Rotors
    • B64C27/35—Rotors having elastomeric joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C27/00—Rotorcraft; Rotors peculiar thereto
    • B64C27/32—Rotors

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

1,243,821. Helicopter rotor bearings. MESSERSCHMITT-BOLKOW-BLOHM G.m.b.H. 4 Oct., 1968 [4 Oct., 1967], No. 47216/68. Heading B7W. [Also in Division F2] A helicopter rotor comprises a hub 1 connected to blade roots such as 8 by laminated elastomer/metal bearings so that the forces acting on each bearing are substantially normal to the laminations of that bearing. Blade root 8 is connected to the arms 6 of stirrup 5 by pin 7, and stirrup 5 is linked through a stirrup 4 and separated therefrom by laminated bearing 9. The arms of stirrup 4 are connected to mountings 2 on hub 1 by pins 3. Stirrup 5 has an extension 12 housed in laminated bearing 13, while stirrup 4 has an extension 10 housed in laminated bearing 11; a threaded part 14 of extension 10 has a nut 16 which, with laminated bearing 15, may be used to pull extension 10, and hence to stress bearing 9. In operation, flexible blades are used to provide flapping and blade lead-lag; bearings 11, 13 have laminations parallel to the blade axis and absorb the forces transverse to the blade, while bearing 9 has transverse laminations and absorbs radial forces. The bearings are easily deformable in shear to allow variations of blade angle. Pre-stressing bearing 9 with nut 16 prevents looseness in the bearing when the rotor is stationary. An embodiment using two conical bearings is described, Fig. 3 (not shown).
GB47216/68A 1967-10-04 1968-10-04 Improvements in rotors for rotary wing aircraft Expired GB1243821A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19671531376 DE1531376A1 (en) 1967-10-04 1967-10-04 Flap-free and pivot-free rotor

Publications (1)

Publication Number Publication Date
GB1243821A true GB1243821A (en) 1971-08-25

Family

ID=5675486

Family Applications (1)

Application Number Title Priority Date Filing Date
GB47216/68A Expired GB1243821A (en) 1967-10-04 1968-10-04 Improvements in rotors for rotary wing aircraft

Country Status (2)

Country Link
FR (1) FR1585533A (en)
GB (1) GB1243821A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2754379A1 (en) * 1976-12-08 1978-07-13 Westland Aircraft Ltd HELICOPTER ROTOR
US4232563A (en) 1978-03-16 1980-11-11 Barry Wright Corporation Laminated elastomeric end bearings for articulating links
CN116834953A (en) * 2022-03-25 2023-10-03 北京中航智科技有限公司 Pitch hub and helicopter based on elastic bearing

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3652185A (en) * 1970-03-13 1972-03-28 Textron Inc Elastomeric rotor blade mount
US3700352A (en) * 1971-03-05 1972-10-24 Lord Corp Rotor system
GB1530366A (en) * 1975-07-18 1978-10-25 Lord Corp Rotary blade retention system
US4028002A (en) * 1976-03-01 1977-06-07 Lord Corporation Rotor blade retention system
GB2059897A (en) * 1979-10-02 1981-04-29 Messerschmitt Boelkow Blohm Helicopter rotor blade-to-hub connections
US4341499A (en) * 1980-03-24 1982-07-27 Barry Wright Corporation Blade retention system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2754379A1 (en) * 1976-12-08 1978-07-13 Westland Aircraft Ltd HELICOPTER ROTOR
US4232563A (en) 1978-03-16 1980-11-11 Barry Wright Corporation Laminated elastomeric end bearings for articulating links
CN116834953A (en) * 2022-03-25 2023-10-03 北京中航智科技有限公司 Pitch hub and helicopter based on elastic bearing

Also Published As

Publication number Publication date
FR1585533A (en) 1970-01-23

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