GB599368A - Improvements in or relating to propeller blade vibration suppressors - Google Patents

Improvements in or relating to propeller blade vibration suppressors

Info

Publication number
GB599368A
GB599368A GB3688/43A GB368843A GB599368A GB 599368 A GB599368 A GB 599368A GB 3688/43 A GB3688/43 A GB 3688/43A GB 368843 A GB368843 A GB 368843A GB 599368 A GB599368 A GB 599368A
Authority
GB
United Kingdom
Prior art keywords
blade
vibration
cavity
damper
cage
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
GB3688/43A
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.)
Raytheon Technologies Corp
Original Assignee
United Aircraft Corp
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 United Aircraft Corp filed Critical United Aircraft Corp
Publication of GB599368A publication Critical patent/GB599368A/en
Expired legal-status Critical Current

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
    • B64C11/008—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft characterised by vibration absorbing or balancing means

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

599,368. Vibration-dampers. UNITED AIRCRAFT CORPORATION. March 6, 1943, No. 3688. Convention date, Nov. 16, 1939. [Class 108 (iii)] [Also in Group XXXIII] A vibration-damper is arranged in a cavity in a propeller blade and includes a member 50 loose in the cavity. The member 50 retained against the action of centrifugal force by rollers 62 disposed between arcuate tracks 54, 58 in the member 50 and a seat 56 supported by the blade; the dimensions of the parts being chosen to give the members a preselected rate of vibration at a selected speed. Lateral blade vibrations cause the loose member to move laterally over the rollers and hence axially against the action of centrifugal force. Member 50 comprises portions 48 and 52 of rectangular and hexagonal sections respectively, the former being supported in a cage 42 comprising cylindrical end portions connected by strips and secured against rotation by pins 46. Perforations may be provided in member 50 and the blade cavity may be filled with liquid to damp movement of the member. Balance weights 72 may be secured to the cage 42 by a bolt 70 which may be screwed inward to abut member 50 and prevent movement thereof. The damper may be applied to a variable-pitch propeller as described in Specification 416,255, [Group XXXIII]
GB3688/43A 1939-11-16 1943-03-06 Improvements in or relating to propeller blade vibration suppressors Expired GB599368A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US599368XA 1939-11-16 1939-11-16

Publications (1)

Publication Number Publication Date
GB599368A true GB599368A (en) 1948-03-11

Family

ID=22026259

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3688/43A Expired GB599368A (en) 1939-11-16 1943-03-06 Improvements in or relating to propeller blade vibration suppressors

Country Status (1)

Country Link
GB (1) GB599368A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2557032A3 (en) * 2011-08-12 2013-10-23 Hamilton Sundstrand Corporation Aircraft propellers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2557032A3 (en) * 2011-08-12 2013-10-23 Hamilton Sundstrand Corporation Aircraft propellers
US8882464B2 (en) 2011-08-12 2014-11-11 Hamilton Sundstrand Corporation Aircraft propellers

Similar Documents

Publication Publication Date Title
GB567814A (en) Improvements relating to screw and nut fastenings
GB519866A (en) Improvements in or relating to damping of vibrations in air-screws
GB558000A (en) Resilient mountings
GB489648A (en) Improvements in or relating to aeronautical propellers
GB599368A (en) Improvements in or relating to propeller blade vibration suppressors
GB1425691A (en) Mounting for a rotor
GB436981A (en) Improvements relating to devices for damping the oscillation of the revolving wings or blades of aircraft
GB909004A (en) Improvements in or relating to propeller blades
DE733669C (en) Spin dryer
AT156312B (en) Vibration exciter for vibrating systems of all kinds.
DE671981C (en) Crushing device with loose grinding bodies
Johnson Behavioral inaction under stress conditions similar to the survivable aircraft accident(Behavioral inaction under stress conditions similar to survivable aircraft accident, tabulating hesitation statistics)
GB521708A (en) Improvement in suspension devices
GB488477A (en) Improvements in or relating to variable-pitch propellers
FR1187201A (en) Improvements to aerodynes with lift rotor integrated in the wing, in particular those with vertical takeoff
USD136677S (en) Tsongas airplane
USD152063S (en) Design for an airplane
USD135646S (en) Design for ax embroidered lace
USD157835S (en) Ladder
Ali English Relations With Haidar Ali 1760-1782
BE592723A (en) Device for damping vibrations of the blades of the upper rotor in helicopters with coaxial rotors.
DE1957226A1 (en) Openwork circular saw blade
GB581691A (en) Improvements in flying training devices
NAGARAJA Analytical and experimental aeroelastic studies of a helicopter rotor in vertical flight[Ph. D. Thesis]
AUFFRET et al. Measurement of low-frequency vibrations in big helicopters and their transmission to the pilot(Helicopter low frequency vibration measurements, and pilot reaction to vibrational transmission)