US3171494A - Servo mechanism for controllable pitch propellers - Google Patents

Servo mechanism for controllable pitch propellers Download PDF

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Publication number
US3171494A
US3171494A US233478A US23347862A US3171494A US 3171494 A US3171494 A US 3171494A US 233478 A US233478 A US 233478A US 23347862 A US23347862 A US 23347862A US 3171494 A US3171494 A US 3171494A
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United States
Prior art keywords
hub
crank
piston
discs
cranks
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Expired - Lifetime
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US233478A
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English (en)
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Liaaen Nils Johannes
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Individual
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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
    • B64C11/40—Blade pitch-changing mechanisms fluid, e.g. hydraulic 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
    • 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
    • B63H2003/084—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 with annular cylinder and piston

Definitions

  • Such a control mechanism, with the associated servo motor arranged in the hub has up till now entailed a complicated construction.
  • the rotation of the blades has been effected by means of a pair of servo cylinders arranged in the hub, one in front and one behind the axes of rotation of the blades.
  • Each cylinder had been equipped with a double acting piston.
  • the cylinder spaces to either side of the piston have communicated with a distribution slide in one piston rod through passages in the hub walls.
  • the piston rods are directed against each other and are provided with slide means associated with the cranks of the crank discs, such cranks being diametrically positioned relatively to the disc axis.
  • a servo motor has been positioned in the hub behind the axes of rotation of the propeller blades.
  • the servo motor is provided with a floating cylinder wherein the bottom which faces forwardly is provided with links or slide means associated with one set of cranks on the crank discs.
  • the piston of the servo motor is in turn, through its piston rod and by means of links or slide means associated with the second set of cranks.
  • the distribution slide of the servo motor may be arranged in or outside of the hub, for instance in the vessel.
  • FIGURES 1 and 4 are axial sectional views of the hub of a controllable pitch propeller, in two different embodiments of the invention.
  • FIGURES 2 and 5 are corresponding sectional views 3,171,494 Patented Mar. 2, 19 65 of the two hubs, taken along the lines B-B in FIGURES 1 and 4, respectively.
  • FIGURES 3 and 6 are views of the corresponding mechanisms, taken along the lines CC of FIGURES 2 and 5, respectively.
  • 1 is the propeller shaft, provided with a flange in the aft end, to which flange the hollow hub 2 of the controllable pitch propeller is secured.
  • 3 is one of the three propeller blades, each blade being bolted to a crank disc 4, thereby enclosing between them an annular bearing ring 21 in the wall of the hub 2.
  • a sealing 5 is positioned around the ring 21 for the purpose of preventing water to enter into and oil to leave the hub.
  • Each crank disc 4 is provided with a pair of cranks 6 and 7, respectively, poistioned at 180 to each other relatively to the axis of the disc 4.
  • the blade may be rotated by means of a servo motor situated in the hub and consisting of a cylinder 8 integral with the hub or flanged on to the same.
  • the cylinder 8 is closed at the aft end, i.e. the end remote from the axes of the blades, and is open at the opposite end, facing the space 22 of the hub.
  • a piston 9 is situated, the same being secured to a piston rod 10 carrying at its forward end a slide means 11 comprising guide members 111 and 112, and therebetween a slide block 12 which may slide along the members 111 and 112 and at the same time turn around the axis of the associated crank 6.
  • the cylinder 8 is also provided with a second piston 13, situated in front of the first piston 9.
  • This second piston 13 is, at 14, in sealed, slidable connection with the piston rod 10, and is in front provided with three projections 131, one to each propeller blade.
  • Each projection 131 is provided with a forward face 132 slidably engaging a slide block 15 which is turnably mounted on the second crank 7.
  • a distribution slide 16 which is supplied with pressure medium through a tube 17 arranged in a bore 110'in the shaft 1.
  • the tube 17 may move the slide 16 axially of the hub, in the usual manner, by actuating from inside the vessel.
  • the slide 16 has inlet port 161 and outlet ports 162 and 163.
  • the slide face in the piston rod 10 is provided with ports 162 communicating with the space between the pistons 9 and 13 and ports 103 and 104 communicating with the cylinder space behind the piston 9.
  • a passage i which establishes communication between the outlet port 163 of the slide and the space 22 in the hub.
  • the slide 16 is also provided with passages 164 which, through the bore 101 in the rod 10 establish communication between the outlet port 162 and the space 22 of the hub.
  • the space 22 is, through the bore in the shaft 1, in communication, in the usual manner, with the suction side of the pressure pump of the servo motor, through an overhead tank, not shown, above the water line of the vessel.
  • the arrangement shown in the FIGURES l to 3 functions in the following manner:
  • the slide 16 is shown in its middle position. If moved slightly to the aft, i.e. to the left in the drawing, the pressure medium is flowing through the tube 17, the inlet port 161, port 102 and further on into the space between the pistons 9 and 13, which are moved away from each other, outlet being provided from the aft side of the piston 9, through the ports 103 and 163 to the passage 105 and also through the ports 104 and 162 and passage 164 to the space 22 in the hub 2,.
  • the returnof the distribution slide. is effected, for instance by actuating the front end of thetube 18 in the vessel.
  • Thepistons 9 and 13 which are always moving in mu-.
  • FIGURES 4 to 6 illustrate a modified construction of the servomotor.
  • tribution slide arranged in the hub, as the slide is mounted journals.
  • the first rotation mechanism 6 and 12 includes a double acting slide means, 11 which, in conventional manner,
  • FIGURES 4 to 6 23 is a cylinder mounted in the aft end of the hub 2 and closed at the aft end by a bottom 24.
  • a bell shapedpiston 9 which is secured to the piston rod 10 which, atits forward end carries the slide means 11' with the slidelrnems ber's 111 and 1 12, betweenzwhich the slide block .12 is: 'slideably mounted while being turnably mounted on the crank 6.
  • the bell shaped piston forms a cylinder 91in which 'a second piston 13 is arranged so as to, at 14,:be in sealed I slidable relation to the piston rod 10.
  • the piston rod'10 isprovidedwith ,a bore 101 and a transverse bore 102 between the pistons 9 and. 13. -111 front of the slide means '11, the piston rod is provided with an extension 103 connected to a tube 18 provided in the portion of the" biggest diameter, the crank 7 is subjected to a greater forwardly directedf'force when the pistons are moved away from each other, than the force towhich the crank 6 is subjected, This'force difference will counteract the rotational momentum to the crank discs 4 which is due to the forward pressure (thrust) onlthe.
  • this effect is not obcontrollable pitchpropeller including a hollow hubrgtatable-about a predetermined axis, a'plurality of blades respectivelyjournalled in said hub for'pitch changing adjustment 'about'axes extending generally radially to said rotational axis, a crank disc positioned on the base of 1 each of' said blades and secured thereto at right angles to the pitch changing axis of thesaid'blade and, provided with a pair of cranks'posi tioned diametrically to the said axis,
  • ton rod-10 is provided with an interior tube 104 which is sealed at the outside'in the rod 10 aft of the transverse bore 102,. but forms an' annular space between the bore 101 and the tube 104' in front of the'bore 102.
  • a pressure medium distribution slide situated inside-the vessel and not shown in the each such projection being in operational connectionwith the said 'slidemeansiof one of said cranks on one crank disc, a second piston mounted for slideable movement in the said cylinder member at the side of the first said piston remote from the said crank discs, and a connecting rod extending axially 'ofthe' said hub between the said second. pistonand the said crank, discs and in operational con-' nection with the said slide means of one crank on each of the said discs.
  • a controllable pitch propeller including a hollow hub rotatable about a predetermined axis, a plurality of blades respectively journalled in said hub for pitch changing adjustment about axes extending generally radially to said rotational axis, a crank disc positioned on the base of each of said blades and secured thereto at right angles to the pitch changing axis of the said blade and provided with a pair of cranks positioned diametrically to the said axis, a slide means carried by the said crank disc and rotatably mounted on each of the said cranks, a cylinder member extending axially of the said hub and being closed at the end remote from the said crank discs and open at the end facing the said crank discs, a piston mounted for slidable movement in the said cylinder member and presenting a plurality of projections extending axially of the said hub, each such projection being in operational connection with the said slide means of one of said cranks on *6 one crank disc, 21 second cylinder member extending axially of the said hub and

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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)
  • Transmission Devices (AREA)
US233478A 1961-10-26 1962-10-26 Servo mechanism for controllable pitch propellers Expired - Lifetime US3171494A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO14192661 1961-10-26

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US3171494A true US3171494A (en) 1965-03-02

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US (1) US3171494A (cs)
DK (1) DK111869B (cs)
GB (1) GB984126A (cs)
SE (1) SE219696C1 (cs)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3393749A (en) * 1967-08-25 1968-07-23 Feroy Arne Controllable pitch propellers
US3645644A (en) * 1970-01-22 1972-02-29 Hydro Drive Corp Interlocking variable-pitch propeller assembly
US4142834A (en) * 1977-06-03 1979-03-06 Arne Feroy Adjustment means for achieving equal crankpin loading in a controllable pitch propeller mechanism
US4365937A (en) * 1979-11-26 1982-12-28 Hiebert Harold L Adjustable pitch propeller drive
US5141399A (en) * 1990-10-18 1992-08-25 United Technologies Corporation Pitch change control system
CN108357658A (zh) * 2018-01-30 2018-08-03 苏州船用动力系统股份有限公司 一种螺旋桨调距结构
CN108945364A (zh) * 2018-05-25 2018-12-07 南京高精船用设备有限公司 一种基于分体式导架结构的大型船舶推进器

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108750057B (zh) * 2018-06-28 2024-06-04 中国船舶重工集团公司第七0四研究所 双曲柄传动的调距桨桨毂
CN109733578B (zh) * 2019-03-12 2024-03-22 中国船舶重工集团公司第七0四研究所 大功率、大尺寸调距桨桨毂

Citations (5)

* 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
FR1130474A (fr) * 1954-04-13 1957-02-06 Dispositif de réglage du pas pour hélice à pas variable
US2913057A (en) * 1955-06-20 1959-11-17 Baldwin Lima Hamilton Corp Operating mechanism for adjustable blade propeller
US2925131A (en) * 1958-12-10 1960-02-16 Baldwin Lima Hamilton Corp Controllable pitch propeller
US3051248A (en) * 1957-04-18 1962-08-28 Ernest-Charles Hatcher Propellers or the like having variable-pitch blades

Patent Citations (5)

* 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
FR1130474A (fr) * 1954-04-13 1957-02-06 Dispositif de réglage du pas pour hélice à pas variable
US2913057A (en) * 1955-06-20 1959-11-17 Baldwin Lima Hamilton Corp Operating mechanism for adjustable blade propeller
US3051248A (en) * 1957-04-18 1962-08-28 Ernest-Charles Hatcher Propellers or the like having variable-pitch blades
US2925131A (en) * 1958-12-10 1960-02-16 Baldwin Lima Hamilton Corp Controllable pitch propeller

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3393749A (en) * 1967-08-25 1968-07-23 Feroy Arne Controllable pitch propellers
US3645644A (en) * 1970-01-22 1972-02-29 Hydro Drive Corp Interlocking variable-pitch propeller assembly
US4142834A (en) * 1977-06-03 1979-03-06 Arne Feroy Adjustment means for achieving equal crankpin loading in a controllable pitch propeller mechanism
US4365937A (en) * 1979-11-26 1982-12-28 Hiebert Harold L Adjustable pitch propeller drive
US5141399A (en) * 1990-10-18 1992-08-25 United Technologies Corporation Pitch change control system
EP0559990A1 (en) * 1990-10-18 1993-09-15 United Technologies Corporation Pitch change control system
CN108357658A (zh) * 2018-01-30 2018-08-03 苏州船用动力系统股份有限公司 一种螺旋桨调距结构
CN108945364A (zh) * 2018-05-25 2018-12-07 南京高精船用设备有限公司 一种基于分体式导架结构的大型船舶推进器

Also Published As

Publication number Publication date
DK111869B (da) 1968-10-14
GB984126A (en) 1965-02-24
SE219696C1 (cs) 1968-03-19

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