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US3241618A - Rotary blade propeller with protection against overload - Google Patents

Rotary blade propeller with protection against overload Download PDF

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Publication number
US3241618A
US3241618A US375177A US37517764A US3241618A US 3241618 A US3241618 A US 3241618A US 375177 A US375177 A US 375177A US 37517764 A US37517764 A US 37517764A US 3241618 A US3241618 A US 3241618A
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US
United States
Prior art keywords
servomotor
propeller
blades
control member
control
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
Application number
US375177A
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English (en)
Inventor
Baer Wolfgang
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.)
JM Voith GmbH
Original Assignee
JM Voith GmbH
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 JM Voith GmbH filed Critical JM Voith GmbH
Application granted granted Critical
Publication of US3241618A publication Critical patent/US3241618A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H1/00—Propulsive elements directly acting on water
    • B63H1/02—Propulsive elements directly acting on water of rotary type
    • B63H1/04—Propulsive elements directly acting on water of rotary type with rotation axis substantially at right angles to propulsive direction
    • B63H1/06—Propulsive elements directly acting on water of rotary type with rotation axis substantially at right angles to propulsive direction with adjustable vanes or blades
    • B63H1/08—Propulsive elements directly acting on water of rotary type with rotation axis substantially at right angles to propulsive direction with adjustable vanes or blades with cyclic adjustment
    • B63H1/10—Propulsive elements directly acting on water of rotary type with rotation axis substantially at right angles to propulsive direction with adjustable vanes or blades with cyclic adjustment of Voith Schneider type, i.e. with blades extending axially from a disc-shaped rotary body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H1/00—Propulsive elements directly acting on water
    • B63H1/02—Propulsive elements directly acting on water of rotary type
    • B63H1/04—Propulsive elements directly acting on water of rotary type with rotation axis substantially at right angles to propulsive direction
    • B63H1/06—Propulsive elements directly acting on water of rotary type with rotation axis substantially at right angles to propulsive direction with adjustable vanes or blades
    • B63H1/08—Propulsive elements directly acting on water of rotary type with rotation axis substantially at right angles to propulsive direction with adjustable vanes or blades with cyclic adjustment
    • B63H1/10—Propulsive elements directly acting on water of rotary type with rotation axis substantially at right angles to propulsive direction with adjustable vanes or blades with cyclic adjustment of Voith Schneider type, i.e. with blades extending axially from a disc-shaped rotary body
    • B63H2001/105—Propulsive elements directly acting on water of rotary type with rotation axis substantially at right angles to propulsive direction with adjustable vanes or blades with cyclic adjustment of Voith Schneider type, i.e. with blades extending axially from a disc-shaped rotary body with non-mechanical control of individual blades, e.g. electric or hydraulic control

Definitions

  • This invention relates to propellers of the Voith- Schneider or cycloidal type and is particularly concerned with a protective arrangement for propellers of this nature.
  • a Voith-Schneider or cycloidal propeller comprises a body rotatable on an axis, usually vertical, and having a plurality of blades depending from beneath the body and rotatable on their axes, so that as the body rotates the blades can supply propulsive effort in one direction to the body which will be transmitted to a ship or the like carrying the propeller.
  • Propellers of this nature have a central control member operatively connected with the blades so that the adjusting of the blades angularly as the propeller body rotates can be determined by adjustment of the control member.
  • the control member is usually operated by one or more fluid servomotors, so that the control member can be positioned in place relative to the body within the limits of movement of the control member and thereby determine the direction of the propulsive effort developed by the propeller.
  • the blades of such propellers not only carry the normal loads imposed thereon by developing the aforementioned propulsive effort, but can also become loaded by objects floating in the water, such as ice or pieces of Wood, or other debris.
  • objects floating in the water such as ice or pieces of Wood, or other debris.
  • Such floating objects not only endanger the rapidly moving propeller blades, but also endanger the linkages inside the propeller body by means of which the angularity of the blades is adjusted.
  • Still another object of the invention is the provision of a device for the protection for protecting the blades and linkages of a cycloidal propeller in which the blades and the linkages pertaining thereto are automatically restored to operative position after disengagement of the blades from the obstruction or floating object which the blade or blades engage.
  • the present invention in brief, is practised by providing pressure limiting means in association with the fluid operated servomotors connected to the adjustable control member by means of which the blade angles are adjusted.
  • the fluid servomotors pertaining to the control member are provided with relief valves that limit the maximum pressure that can be developed therein, such pressure being greater than the normal pressures encountered during operation of the propeller under the usual conditions.
  • the aforementioned relief valves can be arranged to bypass fluid from either end of the servomotors to the other thereof, or can be connected between opposite ends of the servo motor and the fluid supply tank for the servomotors hydraulic system, or the relief valves can be mounted directly in the servomotor pistons.
  • FIGURE 1 is a somewhat diagrammatic view showing the various positions occupied by a propeller blade during one complete rotation of the propeller with the propeller developing thrust in the direction toward the top of the drawing;
  • FIGURE 2 is a somewhat schematic sectional view showing a portion of the propeller body and one propeller blade and the adjusting linkage for the blade;
  • FIGURE 3 is a plan view looking down on the top of the propeller showing the two servomotors pertaining to the control member to be moved thereby and showing relief valves connected between the opposite ends of the servomotor cylinders;
  • FIGURE 4 is a view like FIGURE 3, but shows the relief valves connected between the servomotors and the oil reservoir for the servomotor hydraulic system;
  • FIGURE is a schematic sectional view showing one of the servomotor control valves.
  • FIGURE 6 is a fragmentary Sectional view showing how the relief valves could be built directly into the servomotor pistons.
  • FIGURE 1 the path of movement of the blades is indicated by the dot-dash circle 1.
  • the blades of the propeller are mounted on rotation axes 2 and the blades 3 pivot about their respective axes to vary the angle of attack thereof as the propeller rotates.
  • FIGURE 1 only one blade 3 is illustrated in the several positions which it occupies during one rotation of the propeller in the direction of the arrow 7.
  • the various blade positions indicated by angle phi are at all degrees, 45, 135, 180, 225, and 315.
  • the blades are adjustable by linkages generally indicated at 6, which are under the control of a control member having a control center 5, which is movable in any direction from a center position 4.
  • the propeller will develop thrust in the direction of the arrow 7a in FIGURE 1 as it rotates in the direction of the arrow 7.
  • control center 5 is formed in the center of control member 5a which is movable in the body B, and which control member is operatively connected to the afore-mentioned control linkage 6 in any conventional manner.
  • Lever 8 pivotally mounted in body B is connected by link 12 to rod 13 which extends from servomotor piston 13a that is reciprocable in servomotor cylinder 11.
  • Rod 13 and link 12 are pivotally interconnected by a pin 12a, and which pin also pivotally connects to rod 13 and link 12 a feed back link 12b which influences a servomotor control valve.
  • piston 13a in cylinder 11 divides the cylinder into chambers 16 and 17. These chambers are selectively supplied by conduits 16a and 17a from a servovalve which has a valve member connected by linkage 15b with a control arrangement, not shown, that is under the control of the ships operator.
  • the body of valve 15 is connected by rod means 150 with the aforementioned feed back link 12b, so that upon adjustment of the valve member of valve 15, movement of servomotor piston 13a will be effected, and this movement will feed back through link 12b into the body of valve 15 and restore the initial conditions between the valve body and the valve member therein.
  • a second servomotor generally indicated at 21 is provided and it is provided with a control valve 25, and the construction and arrangement thereof is the same as the servomotor just described, except that the two servomotors are disposed at right angles to each other so that lever 8 can have the upper end 9 thereof adjusted in any direction any amount within the limits of movement of the servomotor from the center point 4.
  • Servomotor 21 has a rod 23 pivotally connected at 23a to link 22 leading to the upper end of lever 8 and at point 23a there is also connected the feed back link 22a which is connected to the body of servovalve 25.
  • Piston 23b of servomotor 21 divides the interior of the cylinder into chambers 26 and 27 which correspond to chambers 16 and 17 of the first mentioned servomotor.
  • each servomotor cylinder has two relief valves A and B pertaining thereto, relief valve A being adapted to open toward the inner end of the respective cylinder, and relief valve B being adapted for opening toward the outer end of the respective cylinder.
  • Conduits 18 and 19 pertaining to cylinder 11 connect the opposite sides of the relief valves to points on the cylinder 11 generally in alignment with the points of connection with the cylinder of conduits 16a and 17a.
  • Conduits 28 and 29 in connection with servomotor 21 similarly connect opposite sides of the aforementioned relief valves with spaced points of the servomotor cylinder.
  • the propeller is provided with a reservoir to which is connected a pump P that supplies pressure fluid to the servomotor valves 15 and 25 and from which valves fluid exhausted from the servomotors is returned.
  • FIGURE 4 shows an arrangement substantially identical to that illustrated in FIGURE 3 except that in FIG- URE 4 all of the relief valves A and B for the two servo motors open toward reservoir 50, and valve A is connected by conduit 31 with a point near one end of one servomotor cylinder, while the adjacent valve B is connected by conduit 32 with a point of the other end of the servomotor cylinder.
  • the same type of relief valves A and B are employed and these are connected in the same manner by conduits 41 and 42 with the pertaining servomotor cylinder.
  • FIGURE 5 A typical servo valve is diagrammatically illustrated in FIGURE 5, valve 15, for example, wherein it will be seen that the rod 150 is connected to the body of the valve so that the body is movable independently of the valve member 15d which, as mentioned before, is under the control of the pilot actuated linkage 15b.
  • FIGURE 3 shows the relief valves connected between spaced points of the servomotor cylinders. These valves could, of course, be connected between the conduits 16a and 17a with the same effect.
  • FIGURE 4 shows the relief valves connected between the servomotor cylinders and the tank 50.
  • FIGURE 6 shows relief valves mounted directly in a servomotor piston.
  • the servomotor piston is indicated at and a first relief valve 61 therein opens from the left side of the piston toward the right side, while a second relief valve 62 therein opens from the right side of the piston toward the left.
  • the FIGURE 6 arrangement functionally thus corresponds to the arrangement of FIGURE 3, because pressures in excess of normal in either end of the srevomotor cylinder 63 will effect communication of that end of the cylinder with the opposite end thereof, thereby permitting movement of the servomotor piston in its cylinder.
  • the protective arrangement of the present invention is fully effective only when the servomotor pistons are not positioned at an extreme end point of their travel. This, however, does not restrict the effectiveness of the system because the ship would not be propelled at full speed in water containing obstructions, such as ice floes. Rather, the ship would be operating at a reduced speed, and the propeller would be at some intermediate pitch position and the servomotor pistons would not be at either extreme end of their travel.
  • a cycloidal propulsion propeller having a body, a plurality of blades pivotally mounted on substantially parallel axes on said body in circumferentially spaced relation thereon, a control member substantially centrally located in said body operatively connected with said blades and movable relative to the body for adjusting the pitch of the blades whereby the propeller will develop propulsive effort, control means connected with said control member for adjusting the position thereof in said body relative to a central neutral position, said control means comprising two angularly related servomotors connected to said control member, each said servomotor comprising a hydraulic system including control valve means having feedback linkage means connected to said control member reversibily controlling the supply of fluid to the respective said servomotor, and relief valve means connected in said hydraulic system operable for exhausting fluid from the pertaining said servomotor whereby deflection of said control member is permitted upon impact to a blade upon development of a pressure therein exceeding the pressures encountered in normal operation of the propeller,
  • a cycloidal propulsion propeller having a body, a plurality of blades pivotally mounted on substantially parallel axes on said body in circumferentially spaced relation thereon, a control member substantially centrally located in said body operatively connected with said blades and movable relative to the body for adjusting the pitch of the blades whereby the propeller will develop propulsive effort, control means connected with said control member for adjusting the position thereof in said body relative to a central neutral position, said control means comprising two angularly related servomotors connected to said control member, each said servomotor comprising a hydraulic system including control valve means having feedback linkage means connected to said control member reversibly controlling the supply of fluid to the respective said servomotor and relief valve means connected in said hydraulic system operable for exhausting fluid from the pertaining said servomotor whereby deflection of said control member is permitted upon impact to a blade upon development of a pressure therein exceeding the pressures encountered in normal operation of the propeller, each said servomotor including a cylinder
  • a cycloidal propulsion propeller having a body, a plurality of blades pivotally mounted on substantially parallel axes on said body in circumferentially spaced relation thereon, a control member substantially centrally located in said body operatively connected with said blades and movable relative to the body for adjusting the pitch of the blades whereby the propeller will develop propulsive effort, control means connected with said control member for adjusting the position thereof in said body relative to a central neutral position, said con trol means comprising two angularly related servomotors connected to said control member, each said servomotor comprising a hydraulic system including control valve means having feedback linkage means connected to said control member reversibly controlling the supply of fluid to the respective said servomotor and relief valve means connected in said hydraulic system operable for exhausting fluid from the pertaining said servomotor whereby deflection of said control member is permitted upon impact to a blade upon development of a pressure therein exceeding the pressures encountered in normal operation of the propeller, each said servomotor including
  • a cycloidal propulsion propeller having a body, a plurality of blades pivotally mounted on substantially parallel axes on said body in circumferentially spaced relation thereon, a control member substantially centrally located in said body operatively connected with said blades and movable relative to the body for adjusting the pitch of the blades whereby the propeller will develop propulsive effort, control means connected with said control member for adjusting the position thereof in said body relative to a central neutral position, said control means comprising two angularly related servomotors connected to said control member, each said servomotor comprising a hydraulic system including control valve means having feedback linkage means connected to said control member reversibly controlling the supply of fluid to the respective said servomotor, and relief valve means connected in said hydraulic system operable for exhausting fluid from the pertaining said servomotor whereby deflection of said control member is permitted upon impact to a blade upon development of a pressure therein exceeding the pressures encountered in normal operation of the propeller, each said servomotor including a
  • said relief valve means comprising first and second relief valves mounted directly in said servomotor piston, each of said relief vIalves controlling separate passageways through said piston, said first relief valve opening from the left side of the piston to the right side thereon and said second relief valve opening from the right side of the piston to the left side thereof.
  • said relief valve means comprising first and second relief valves positioned in separate conduits, each conduit having its opposite ends connected to the said spaced points of the pertaining cylinder and thus being in communication with the inner and outer ends of said servomotor cylinder and in by-passing relation to the piston therein, said first 7 valve opening toward the inner end of the cylinder and said second valve opening toward the outer end of the cylinder.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Hydraulic Turbines (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US375177A 1963-06-28 1964-06-15 Rotary blade propeller with protection against overload Expired - Lifetime US3241618A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEV24240A DE1192945B (de) 1963-06-28 1963-06-28 Fluegelradpropeller

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US3241618A true US3241618A (en) 1966-03-22

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US375177A Expired - Lifetime US3241618A (en) 1963-06-28 1964-06-15 Rotary blade propeller with protection against overload

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DE (1) DE1192945B (de)
GB (1) GB1052763A (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3690787A (en) * 1970-05-16 1972-09-12 Voith Gmbh J M Apparatus for indicating the position of the control center for the blades of a rotating blade propeller
US3700349A (en) * 1970-06-18 1972-10-24 J M Veith Gmbh Control system for a blade-wheel propeller
US3704961A (en) * 1970-06-18 1972-12-05 Siemens Ag Control system for a cycloid propeller for ships
US3902072A (en) * 1974-02-19 1975-08-26 Paul J Quinn Wind turbine
US4225286A (en) * 1977-01-19 1980-09-30 J. M. Voith Gmbh Thrust generating device
US4286923A (en) * 1978-01-04 1981-09-01 J. M. Voith Gmbh Overload protection device for a propeller drive engine
US4380417A (en) * 1979-07-11 1983-04-19 J. M. Voith Gmbh Installation operated with wind or water power
US4465431A (en) * 1981-07-03 1984-08-14 J. M. Voith Gmbh Overload protection apparatus for variable pitch propellers
US20070169482A1 (en) * 2006-01-24 2007-07-26 Weightman Gerald N Aspects derived from a discovery of the inherent properties and traits of planar curves herein classified as Limaconic Motation technology

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19637833C1 (de) 1996-09-17 1998-02-05 Voith Hydro Gmbh Schiffstechni Zykloidalpropeller
NL1005087C2 (nl) * 1997-01-24 1998-07-27 Drietand A V V Voortstuwings-inrichting voor een vaartuig.
DE19718682C1 (de) 1997-05-02 1998-11-26 Voith Hydro Gmbh Zykloidalpropeller

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2015514A (en) * 1934-03-26 1935-09-24 Voith Schneider Propeller Comp Device for the control of motion of movable blades on blade wheels
US2155892A (en) * 1937-01-08 1939-04-25 Askania Werke Ag Stabilizing device
FR864455A (fr) * 1938-08-13 1941-04-28 Messerschmitt Boelkow Blohm Installation servo-motrice alimentée par un liquide sous pression, notamment pour actionner des éléments d'avion
US2864239A (en) * 1956-10-04 1958-12-16 Sperry Rand Corp Electro-hydraulic servo system for steering dirigible craft
US2992632A (en) * 1954-11-03 1961-07-18 Harry J Nichols Hydraulic remote control systems

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2015514A (en) * 1934-03-26 1935-09-24 Voith Schneider Propeller Comp Device for the control of motion of movable blades on blade wheels
US2155892A (en) * 1937-01-08 1939-04-25 Askania Werke Ag Stabilizing device
FR864455A (fr) * 1938-08-13 1941-04-28 Messerschmitt Boelkow Blohm Installation servo-motrice alimentée par un liquide sous pression, notamment pour actionner des éléments d'avion
US2992632A (en) * 1954-11-03 1961-07-18 Harry J Nichols Hydraulic remote control systems
US2864239A (en) * 1956-10-04 1958-12-16 Sperry Rand Corp Electro-hydraulic servo system for steering dirigible craft

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3690787A (en) * 1970-05-16 1972-09-12 Voith Gmbh J M Apparatus for indicating the position of the control center for the blades of a rotating blade propeller
US3700349A (en) * 1970-06-18 1972-10-24 J M Veith Gmbh Control system for a blade-wheel propeller
US3704961A (en) * 1970-06-18 1972-12-05 Siemens Ag Control system for a cycloid propeller for ships
US3902072A (en) * 1974-02-19 1975-08-26 Paul J Quinn Wind turbine
US4225286A (en) * 1977-01-19 1980-09-30 J. M. Voith Gmbh Thrust generating device
US4286923A (en) * 1978-01-04 1981-09-01 J. M. Voith Gmbh Overload protection device for a propeller drive engine
US4380417A (en) * 1979-07-11 1983-04-19 J. M. Voith Gmbh Installation operated with wind or water power
US4465431A (en) * 1981-07-03 1984-08-14 J. M. Voith Gmbh Overload protection apparatus for variable pitch propellers
US20070169482A1 (en) * 2006-01-24 2007-07-26 Weightman Gerald N Aspects derived from a discovery of the inherent properties and traits of planar curves herein classified as Limaconic Motation technology

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Publication number Publication date
DE1192945B (de) 1965-05-13
GB1052763A (en) 1966-12-30

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