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GB2003251A - Reducing compression- induced shear strain in elastomeric stacks - Google Patents

Reducing compression- induced shear strain in elastomeric stacks

Info

Publication number
GB2003251A
GB2003251A GB7831716A GB7831716A GB2003251A GB 2003251 A GB2003251 A GB 2003251A GB 7831716 A GB7831716 A GB 7831716A GB 7831716 A GB7831716 A GB 7831716A GB 2003251 A GB2003251 A GB 2003251A
Authority
GB
United Kingdom
Prior art keywords
layer
elastomeric
shear strain
elasticity
adjacent
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.)
Granted
Application number
GB7831716A
Other versions
GB2003251B (en
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.)
Lord Corp
Original Assignee
Lord 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
Priority claimed from US05/821,003 external-priority patent/US4105266A/en
Application filed by Lord Corp filed Critical Lord Corp
Publication of GB2003251A publication Critical patent/GB2003251A/en
Application granted granted Critical
Publication of GB2003251B publication Critical patent/GB2003251B/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
    • 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
    • F16F1/00—Springs
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • F16F1/40—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers consisting of a stack of similar elements separated by non-elastic intermediate layers
    • F16F1/403—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers consisting of a stack of similar elements separated by non-elastic intermediate layers characterised by the shape of the non-elastic interengaging parts between the elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10—Type of spring
    • B60G2202/14—Plastic spring, e.g. rubber
    • B60G2202/143—Plastic spring, e.g. rubber subjected to compression
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/12—Mounting of springs or dampers
    • B60G2204/125—Mounting of rubber type springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/45—Stops limiting travel
    • B60G2204/4504—Stops limiting travel using cable or band to prevent extension

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Architecture (AREA)
  • Springs (AREA)
  • Support Of The Bearing (AREA)
  • Vibration Prevention Devices (AREA)
  • Sliding-Contact Bearings (AREA)

Abstract

A laminated resilient element comprising a plurality of annular layers of elastomeric material (96b) and non-extensible material (98b) which alternate with each other and which are bonded together. The layers alternate along a common axis (92) extending lengthwise of the bearing so that the bearing can support substantial compressive loads applied generally normal to the layers. The layers include at least one elastomeric layer (Fig. 6A) which, if it were formed to have a constant modulus of elasticity throughout and were subjected to a compressive load, would experience a shear strain adjacent one of its inner and outer circumferences greater than the shear strain adjacent the other circumference. Such a difference in compression-induced shear strains would tend to cause uneven wearing of and a reduced service life for the elastomeric layer in question and for the element as a whole. To avoid or minimize uneven wear, the elastomeric layer is formed to have at least two different moduli of elasticity. The modulus of the layer is made higher or highest adjacent the circumference of the layer which tends to experience the higher compression-induced shear strain. As a result, the ratio between the shear strains adjacent the two circumferences of the layer is less than it would be if the layer had a constant modulus of elasticity throughout. The modulus of elasticity is varied by using elastomeric rings 118, 120, 122 of decreasing hardness. <IMAGE>
GB7831716A 1977-08-01 1978-07-31 Laminated bearing with plural modulus layer Expired GB2003251B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/821,003 US4105266A (en) 1975-11-17 1977-08-01 Laminated bearing with plural modulus layer

Publications (2)

Publication Number Publication Date
GB2003251A true GB2003251A (en) 1979-03-07
GB2003251B GB2003251B (en) 1982-08-25

Family

ID=25232250

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7831716A Expired GB2003251B (en) 1977-08-01 1978-07-31 Laminated bearing with plural modulus layer

Country Status (5)

Country Link
DE (1) DE2833747A1 (en)
FR (1) FR2399570A2 (en)
GB (1) GB2003251B (en)
IT (1) IT1110194B (en)
SE (1) SE437411B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2126916C1 (en) * 1996-05-31 1999-02-27 Брянская государственная сельскохозяйственная академия Method of damping vibrations
EP2032427A4 (en) * 2006-06-20 2014-01-01 Bell Helicopter Textron Inc CENTRIFUGAL FORCE BEARING WITH STABLE TANGING MOMENT
WO2024110130A1 (en) * 2022-11-25 2024-05-30 Robert Bosch Gmbh Tank system for a hydrogen-powered vehicle, fuel cell assembly, hydrogen internal combustion engine system, fuel cell-powered vehicle, hydrogen-powered vehicle

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4291925A (en) * 1979-07-26 1981-09-29 Barry Wright Corporation Laminated bearings with dual stock layers
US4286827A (en) * 1979-10-11 1981-09-01 Barry Wright Corporation Cylindrical elastomeric bearing
CA2055202C (en) * 1990-12-17 1992-06-18 Francis E. Byrnes Snubber-bearing with combined elastomer laminates
US5188513A (en) * 1990-12-17 1993-02-23 United Technologies Corporation Snubber-bearing with combined elastomer laminates
DE102005003986A1 (en) * 2005-01-28 2006-08-03 Schaeffler Kg camp

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE516580C (en) * 1928-10-10 1931-01-24 Emil Zorn Akt Ges Spacer plate made of flexible building materials between pressure-generating and pressure-absorbing components
US2560627A (en) * 1946-01-17 1951-07-17 Gomma Antivibranti Applic Combination metal and rubber structure
US3083065A (en) * 1959-08-10 1963-03-26 William L Hinks Static load bearing having preformed lateral support features
US3071422A (en) * 1959-08-10 1963-01-01 William L Hinks Continuous strip type of static load bearing
US3179400A (en) * 1963-06-11 1965-04-20 Lord Mfg Co Torsion spring
GB1095598A (en) * 1964-12-01 1967-12-20 William Lloyd Hinks A Laminated Support Fixture for Carrying a Load Subject to Dynamic Movement.
US3292711A (en) * 1965-03-30 1966-12-20 Lord Corp Blade pitch change bearing
US3606295A (en) * 1968-11-12 1971-09-20 Unilan Ag Shock absorber
DE1959298A1 (en) * 1969-11-26 1971-06-16 Joern Raoul Dipl Ing Layered spring made of several pressure-loaded rubber-metal spring washers connected in series
US3679197A (en) * 1971-05-27 1972-07-25 Lord Corp Compressive load carrying bearings
US3807896A (en) * 1972-10-10 1974-04-30 Textron Inc Concentric tube spring rotor mount
US3829239A (en) * 1973-02-21 1974-08-13 United Aircraft Corp Multiple element journal bearing
US3941433A (en) * 1975-05-05 1976-03-02 Thiokol Corporation Flexible bearing having low torque resistance
US4040690A (en) * 1975-11-17 1977-08-09 Lord Corporation Laminated bearing
CA1095573A (en) * 1977-06-15 1981-02-10 Robert R. Peterson Laminated bearing structures

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2126916C1 (en) * 1996-05-31 1999-02-27 Брянская государственная сельскохозяйственная академия Method of damping vibrations
EP2032427A4 (en) * 2006-06-20 2014-01-01 Bell Helicopter Textron Inc CENTRIFUGAL FORCE BEARING WITH STABLE TANGING MOMENT
WO2024110130A1 (en) * 2022-11-25 2024-05-30 Robert Bosch Gmbh Tank system for a hydrogen-powered vehicle, fuel cell assembly, hydrogen internal combustion engine system, fuel cell-powered vehicle, hydrogen-powered vehicle

Also Published As

Publication number Publication date
FR2399570A2 (en) 1979-03-02
SE7808265L (en) 1979-03-23
IT1110194B (en) 1985-12-23
DE2833747C2 (en) 1988-06-01
IT7826372A0 (en) 1978-08-01
DE2833747A1 (en) 1979-03-08
FR2399570B2 (en) 1984-12-21
GB2003251B (en) 1982-08-25
SE437411B (en) 1985-02-25

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Effective date: 19980730