GB756797A - Improvements in and relating to aerofoils and methods of manufacturing same - Google Patents

Improvements in and relating to aerofoils and methods of manufacturing same

Info

Publication number
GB756797A
GB756797A GB17855/54A GB1785554A GB756797A GB 756797 A GB756797 A GB 756797A GB 17855/54 A GB17855/54 A GB 17855/54A GB 1785554 A GB1785554 A GB 1785554A GB 756797 A GB756797 A GB 756797A
Authority
GB
United Kingdom
Prior art keywords
members
moulded
aerofoils
sleeves
blade
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
GB17855/54A
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.)
Societe Nationale des Constructions Aeronautiques du Sud Est SNCASE
Original Assignee
Societe Nationale des Constructions Aeronautiques du Sud Est SNCASE
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 Societe Nationale des Constructions Aeronautiques du Sud Est SNCASE filed Critical Societe Nationale des Constructions Aeronautiques du Sud Est SNCASE
Publication of GB756797A publication Critical patent/GB756797A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D99/00—Subject matter not provided for in other groups of this subclass
    • B29D99/0025—Producing blades or the like, e.g. blades for turbines, propellers, or wings
    • B29D99/0028—Producing blades or the like, e.g. blades for turbines, propellers, or wings hollow blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
    • B29C70/446—Moulding structures having an axis of symmetry or at least one channel, e.g. tubular structures, frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/86—Incorporated in coherent impregnated reinforcing layers, e.g. by winding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C27/00—Rotorcraft; Rotors peculiar thereto
    • B64C27/32—Rotors
    • B64C27/46—Blades
    • B64C27/473—Constructional features
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/10—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies
    • B29C43/12—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies using bags surrounding the moulding material or using membranes contacting the moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/08—Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
    • B29L2031/082—Blades, e.g. for helicopters

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

756,797. Aircraft rotor blades and aerofoils. SOC. NATIONALE DE CONSTRUCTIONS AERONAUTIQUES DU SUD-EST. June 17, 1954 [June 19, 1953], No. 17855/54. Class 4. [Also in Group VIII] A rotor blade for a rotary wing aircraft comprises a tubular spar 1 having a root portion 4 of substantially cylindrical shape embedded within and soldered to a root attachment sleeve 19 to which it is secured also by a nut 21, the portion 4 extending into a tapered section 5 and an extended length 6 of substantially constant ovoid section which may be twisted throughout its length. Sleeves 24, formed by wrapping plastic material reinforced by layers of glass fabric and provided with embedded lightening cores such as 25, 26 of balsa wood are moulded on to the spar length 6. The sleeves which may be moulded with an excessive thickness of material subsequently removed by profiling or moulded initially to the finished profile, are divided spanwise in abutting relationship and they are secured by bonding to trailing edge box members 2 which carry attachment flanges 32, 51b. The members 2 also have lightening cores 49 and they are provided with integrally moulded spanwise webs 7, 8 and dished end closure panels 13. The gap 50 between adjoining edges of the members 2 and the corresponding cavities formed between the dished panels are filled with sponge rubber or cast cellular material which completes the aerofoil profile and permits relative movement between adjoining members 2 resulting from drag distortion of the blade. The leading edge of the blade is protected by sheet metal panels 3 overlapping the transverse edges of the members 2 and the tip end of the spar carries a fish-plate 15 for the attachment of balance weights 17. In a further embodiment, (Fig. 6, not shown), the sleeves 24 and box members 2 are moulded integrally. The invention is applicable to aerofoils other than rotor blades.
GB17855/54A 1953-06-19 1954-06-17 Improvements in and relating to aerofoils and methods of manufacturing same Expired GB756797A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR756797X 1953-06-19

Publications (1)

Publication Number Publication Date
GB756797A true GB756797A (en) 1956-09-12

Family

ID=9165782

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17855/54A Expired GB756797A (en) 1953-06-19 1954-06-17 Improvements in and relating to aerofoils and methods of manufacturing same

Country Status (1)

Country Link
GB (1) GB756797A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108357662A (en) * 2017-01-26 2018-08-03 空中客车运营有限公司 Deformable shim and installation arrange
CN111231369A (en) * 2020-02-18 2020-06-05 中材科技风电叶片股份有限公司 Protective shell, preparation method thereof and manufacturing method of wind power blade
CN111246992A (en) * 2017-10-18 2020-06-05 Lm风力发电国际技术有限公司 Wind turbine blade comprising an adaptively positioned root end structure with pultruded elements

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108357662A (en) * 2017-01-26 2018-08-03 空中客车运营有限公司 Deformable shim and installation arrange
CN108357662B (en) * 2017-01-26 2023-03-14 空中客车运营有限公司 Deformable shim and mounting arrangement
CN111246992A (en) * 2017-10-18 2020-06-05 Lm风力发电国际技术有限公司 Wind turbine blade comprising an adaptively positioned root end structure with pultruded elements
CN111231369A (en) * 2020-02-18 2020-06-05 中材科技风电叶片股份有限公司 Protective shell, preparation method thereof and manufacturing method of wind power blade

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