US3393749A - Controllable pitch propellers - Google Patents

Controllable pitch propellers Download PDF

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Publication number
US3393749A
US3393749A US663291A US66329167A US3393749A US 3393749 A US3393749 A US 3393749A US 663291 A US663291 A US 663291A US 66329167 A US66329167 A US 66329167A US 3393749 A US3393749 A US 3393749A
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US
United States
Prior art keywords
crankpins
propeller
hub
cylinder
self
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 - Lifetime
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US663291A
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English (en)
Inventor
Feroy Arne
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to US663291A priority Critical patent/US3393749A/en
Application granted granted Critical
Publication of US3393749A publication Critical patent/US3393749A/en
Priority to NO03184/68A priority patent/NO128952B/no
Priority to DE19681781066 priority patent/DE1781066A1/de
Priority to GB39655/68A priority patent/GB1241314A/en
Priority to NL6811863A priority patent/NL6811863A/xx
Priority to FR1602967D priority patent/FR1602967A/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B64C11/30—Blade pitch-changing mechanisms
    • B64C11/38—Blade pitch-changing mechanisms fluid, e.g. hydraulic
    • B64C11/42—Blade pitch-changing mechanisms fluid, e.g. hydraulic non-automatic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H3/00—Propeller-blade pitch changing
    • B63H3/06—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical
    • B63H3/08—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical fluid
    • B63H3/081—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical fluid actuated by control element coaxial with the propeller shaft
    • B63H3/082—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical fluid actuated by control element coaxial with the propeller shaft the control element being axially reciprocatable

Definitions

  • ABSTRACT OF THE DISCLOSURE In a controllable pitch propeller, a double-crank blade-turning mechanism having a self-aligning connection between an axially movable control member and one set of crankpins, to provide equal loadings on all the crankpins.
  • This invention relates to controllable pitch propellers of the class having two crankpins on each blade ange (and to double-crank mechanisms in general).
  • the principal object of the invention is to provide, in a controllable Ipitch propeller, a double-crank blade-turning mechanism having selfaligning connections between an axially movable control member and one set of crankpins, to provide equal loadings on all the crankpins.
  • a blade-turning double-crank mechanism having a plurality of hydraulic cylinders, one attached to each crank, is known, but is very costly and complex. Also since the individual piston areas are limited is size (all cylinders being located within the propeller hub) the oil pressure required to actuate the mechanism must be excessive.
  • An object of the invention is to provide a blade-turning double-crank mechanism for controllable pitch propellers with a plurality of blades, having only one hydraulic cylinder and piston combined with self-aligning connections providing equal loadings on the several crankpins.
  • FIG. l is a longitudinal section of the propeller hub
  • FIG. 2 is a plan View tpartially in section on line 2 2 of FIG. 1;
  • FIG. 3 is a' transverse section on line 3-3 of FIG. 1;
  • FIG. 4 is a transverse section on line 4 4 of FIG. 1;
  • FIGS. 5, 6, and 7 are diagrammatic transverse sectional views showing the self-aligning flexible connections for two-bladed, four-bladed, and five-bladed controllable pitch propellers respectively.
  • propeller hub 10 is bolted to shaft 11 by capscrews 12.
  • Propeller hub 10 is provided with sockets 15 each of which receives flange 14 attached to propeller blade 15.
  • Flange 14 is provided with two crankpins 16.
  • Carrier blocks 17 and 18 are slidable on the inner surface of flange 14 and have slots 19 and 20 respectively.
  • Slots 23 of carrier blocks 18 may interlock with notched flange 24 of hydraulic cylinder 25.
  • Cylinder 25 is provided with piston 26 having cylindrical portion 27 extending out from one end of cylinder 25 and through center block 28.
  • Cylindrical portion 27 of lpiston 26 is provided with convex spherical seat 29 matching concave spherical seat 30 of self-aligning member 31.
  • convex spherical seat 32 4of self-aligning member 31 mates with and slides in concave spherical seat 33 of nut 34, these spherical mating surfaces 29, 30, 32 and 33 being concentric.
  • Slots 35 of carrier blocks 17 may interlock with notched flange 36 of self-aligning member 31.
  • Pin 41 prevents self-aligning member 31 from rotating relative to hub 10, to prevent slots 35 of carrier blocks 17 from unlocking from notched self-aligning member 31.
  • Key 42 prevents cylinder 25 from rotating relative to hub 10, to prevent slots 23 of carrier blocks 18 from unlocking from notched flange 24 of cylinder 25.
  • Propeller hub end cap 37 is fastened to hub 10 and is provided with inner cylindrical surface 52 which serves as a sliding guide for cylinder 25.
  • flanges 14 are inserted through one end of hub 10 and blades 15 are fastened to flanges 14.
  • Carrier blocks 17 are inserted from one end of hub 10 and carrier blocks 18 are inserted from the other end lof hub 10, using the space provided for but not yet occupied by spacers 40.
  • Sliding blocks 21 and 22 are inserted in slots 19 and 20 and are pivoted on crankpins 16. Insertion of spacers 40 and center block 28 hold the previously assembled parts in place.
  • Slots 35 of carrier blocks 17 are positioned to the left of carrier blocks 18, and slots 23 of carrier blocks 18 are located to the right of carrier blocks 17 (FIGS. 1 and 2). Inserting cylinder 25 and piston 26 assembly from the right end of hub 10, notched flange 24 of cylinder 25 may pass between carrier blocks 18; then rotating cylinder 25 causes notched flange 24 to interlock with slots 23 of carrier blocks 18, joining carrier blocks 18 and cylinder 25 in one assembly. Key 42 keeps cylinder 25 from turning out of interlocking position with carrier blocks 18. Self-aligning member 31 is inserted against spherical seat 29 of piston cylindrical stem 27, clearing carrier blocks 18 and spacers 40. Rotating self-aligning member 31 interlocks its notched periphery with slots 35 of carrier blocks 17. Insertion of lock Lpin 41 and nut 34 completes the assembly of the hub structure.
  • Piston 26 is provided with two ports, one leading to each end of cylinder 25.
  • Servo valve 38 is attached to end of control rod 39 which also serves as an oil supply line carrying oil under pressure to move cylinder 25 and piston 26 in opposite directions to control the pitch of the propeller from forward position to neutral and reverse, and return.
  • FIGS. 14 illustrate a three-bladed controllable pitch propeller with three carrier blocks 17 each being connected to self-aligning member 31. Three is the maximum number of connection points any such self-aligning member may have and provide equal loading on all crankpins 16.
  • FIG. 6 shows diagrammatically a fourbladed controllable pitch propeller arrangement in which equal loading is obtained on all crankpins.
  • carrier blocks 17 are interconnected to a common linkage 43 by means of the spherical self-aligning connection hereinbefore described.
  • Triangular connector plate 44 connects linkage 43 with the remaining two carrier blocks 17. By loading the center of connector plate 44 in a self-aligning manner, plate 44 and linkage 43 will pivot slightly to provide equal loading on all carrier blocks 17 and crankpins 16.
  • FIG. 7 shows diagrammatically a similar arrangement for a tive-bladed propeller
  • FIG. 5 shows the arrangement for a two-bladed propeller; these views are self-explanatory.
  • a blade-turning mechanism comprising a ange on each blade and operably seated in said hub, a pair of crankpins on each ange, an axially movable hydraulic cylinder in said hub, operable connections between said cylinder and one set of said crankpins; an axially movable piston in said cylinder; and operable connections between said piston and the other set of said crankpins, one of said operable connections including a self-aligning member constructed and arranged to equalize the loading on the several crankpins, and means for moving said cylinder and piston in opposite directions to control the pitch of said blades from forward position to neu tral and reverse, 'and return.
  • the said means for moving said cylinder and piston in opposite directions comprising means for feeding oil under pressure to Said cylinder on either side of said piston.
  • the lpropeller hub being an integral unit (not split on the plane of the propeller blades), and said operable connections including members notched'to permit interlocking assembly of the various parts in said integral propeller hub.
  • said operable connections each including a block operably pivoted on one of said crankpins, a carrier block slidable on the inner face of each of said blade flanges, a slot in said carrier block and slidable on said crankpin-pivoted block, a transverse slot at one end of each of said carrier blocks, and a notched member rotatable during assembly into interlocking connection with said transverse slots.
  • a blade-turning mechanism comprising a flange on cach blade and operably seated in said hub, a pair of crankpins on each ange, axially movable control means in said hub, operable connections between said control means and one set of said crankpins, operable connections between said control means and the other set of said crankpins and including self-aligning members constructed and arranged to equalize the loading on the several crankpins, and means for moving said control means to control the pitch of said blades from forward position to neutral and reverse, and return.

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Reciprocating Pumps (AREA)
US663291A 1967-08-25 1967-08-25 Controllable pitch propellers Expired - Lifetime US3393749A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US663291A US3393749A (en) 1967-08-25 1967-08-25 Controllable pitch propellers
NO03184/68A NO128952B (pm) 1967-08-25 1968-08-13
DE19681781066 DE1781066A1 (de) 1967-08-25 1968-08-19 Propeller mit verstellbarer Blattsteigung
GB39655/68A GB1241314A (en) 1967-08-25 1968-08-19 Controllable pitch propellers
NL6811863A NL6811863A (pm) 1967-08-25 1968-08-20
FR1602967D FR1602967A (pm) 1967-08-25 1968-08-23

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US663291A US3393749A (en) 1967-08-25 1967-08-25 Controllable pitch propellers

Publications (1)

Publication Number Publication Date
US3393749A true US3393749A (en) 1968-07-23

Family

ID=24661208

Family Applications (1)

Application Number Title Priority Date Filing Date
US663291A Expired - Lifetime US3393749A (en) 1967-08-25 1967-08-25 Controllable pitch propellers

Country Status (6)

Country Link
US (1) US3393749A (pm)
DE (1) DE1781066A1 (pm)
FR (1) FR1602967A (pm)
GB (1) GB1241314A (pm)
NL (1) NL6811863A (pm)
NO (1) NO128952B (pm)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3645644A (en) * 1970-01-22 1972-02-29 Hydro Drive Corp Interlocking variable-pitch propeller assembly
DE2137061A1 (de) * 1970-09-21 1972-03-23 Feroy, Arne, Federal Way, Wash. (V.StA.) Steuerbarer Verstellpropeller
US3792937A (en) * 1970-11-04 1974-02-19 Dowty Rotol Ltd Bladed rotors
US3912417A (en) * 1974-04-15 1975-10-14 William B Herbert Mechanism for controlling the pitch of propeller blades
US4076453A (en) * 1975-06-23 1978-02-28 Arne Feroy Bearing ring for blade of a controllable pitch propeller

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2693243A (en) * 1952-07-23 1954-11-02 John H Strandell Double crank controllable pitch propeller
US2794508A (en) * 1953-10-26 1957-06-04 Karlstad Mekaniska Ab Controllable pitch propeller
US3171494A (en) * 1961-10-26 1965-03-02 Liaaen Nils Johannes Servo mechanism for controllable pitch propellers

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2693243A (en) * 1952-07-23 1954-11-02 John H Strandell Double crank controllable pitch propeller
US2794508A (en) * 1953-10-26 1957-06-04 Karlstad Mekaniska Ab Controllable pitch propeller
US3171494A (en) * 1961-10-26 1965-03-02 Liaaen Nils Johannes Servo mechanism for controllable pitch propellers

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3645644A (en) * 1970-01-22 1972-02-29 Hydro Drive Corp Interlocking variable-pitch propeller assembly
DE2137061A1 (de) * 1970-09-21 1972-03-23 Feroy, Arne, Federal Way, Wash. (V.StA.) Steuerbarer Verstellpropeller
JPS5520916B1 (pm) * 1970-09-21 1980-06-05
US3792937A (en) * 1970-11-04 1974-02-19 Dowty Rotol Ltd Bladed rotors
US3912417A (en) * 1974-04-15 1975-10-14 William B Herbert Mechanism for controlling the pitch of propeller blades
US4076453A (en) * 1975-06-23 1978-02-28 Arne Feroy Bearing ring for blade of a controllable pitch propeller

Also Published As

Publication number Publication date
DE1781066A1 (de) 1970-10-22
NO128952B (pm) 1974-02-04
FR1602967A (pm) 1971-03-01
NL6811863A (pm) 1969-02-27
GB1241314A (en) 1971-08-04

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