US3711968A - Dredge cutter head with counterbalancing vibrating system - Google Patents

Dredge cutter head with counterbalancing vibrating system Download PDF

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Publication number
US3711968A
US3711968A US00093011A US3711968DA US3711968A US 3711968 A US3711968 A US 3711968A US 00093011 A US00093011 A US 00093011A US 3711968D A US3711968D A US 3711968DA US 3711968 A US3711968 A US 3711968A
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US
United States
Prior art keywords
cutter
shaft
pump
hydraulic
vibrating
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
US00093011A
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English (en)
Inventor
Heijst W Van
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.)
IHC Holland NV
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IHC Holland NV
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Filing date
Publication date
Application filed by IHC Holland NV filed Critical IHC Holland NV
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Publication of US3711968A publication Critical patent/US3711968A/en
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    • 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
    • F16H—GEARING
    • F16H39/00—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution
    • F16H39/02—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution with liquid motors at a distance from liquid pumps
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
    • E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
    • E02F3/92—Digging elements, e.g. suction heads
    • E02F3/9212—Mechanical digging means, e.g. suction wheels, i.e. wheel with a suction inlet attached behind the wheel
    • E02F3/9225—Mechanical digging means, e.g. suction wheels, i.e. wheel with a suction inlet attached behind the wheel with rotating cutting elements
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
    • E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
    • E02F3/92—Digging elements, e.g. suction heads
    • E02F3/9287—Vibrating suction heads
    • 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
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • 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
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/32—Correcting- or balancing-weights or equivalent means for balancing rotating bodies, e.g. vehicle wheels
    • F16F15/322—Correcting- or balancing-weights or equivalent means for balancing rotating bodies, e.g. vehicle wheels the rotating body being a shaft

Definitions

  • ABSTRACT A cutter dredger with a rotary cutter adjacent the mouth of a suction pipe, in which a second vibratory system balances the first vibratory system comprised by the rotating cutter and its shaft when they encounter resistance during dredging.
  • the drive is applied to the two vibratory systems at their point of interconnection, to reduce the strain on the drive train.
  • the drive may be mechanical, intermediate the length of a torsion shaft, or hydraulic. 1f hydraulic, a common pump drives motors individual to the two vibratory systems and accumulators are disposed between each pair of the pump and motors. in a compact hydraulic embodiment, the drive and the two driven systems are concentrically interconnected.
  • the present invention relates to cutter dredgers of the type in which a rotary cutting device, mounted on the end of a rotary drive shaft, is disposed adjacent the mouth of a suction pipe. During operation of such a device, vibrations will be induced in the bottom of the body of water in which the dredging takes place, and the cutting device will correspondingly vibrate either at the same frequency or at a harmonic of that frequency.
  • the present invention may be mechanically operated or hydraulically operated. If mechanically operated, a twistable shaft may interconnect the two vibrating systems with the drive applied to the shaft intermediate the loads. If hydraulically operated, the cutting device is connected to a hydraulic motor and the second system or counterbalancing mass is connected to a second motor, the two motors being driven by a common pump in a closed hydraulic circuit, with accumulators between the pump and each motor and also between the two motors.
  • the drive and the cutter and the second system or counterbalancing mass may be related to each other as concentric sleeves carrying radially outwardly and/or inwardly directed ribs that oppose each other peripherally to define hydraulically and/or mechanically pressurized chambers between the ribs.
  • the cutter may be connected to the innermost member, the drive to the next outer member, and the second or counterbalancing vibrating system may comprise the outermost member.
  • the interfingering ribs of the concentric members may be urged apart by fluid pressure, e.g., hydraulically, or by mechanical pressure, as by rubber members or springs.
  • the system may be 1 tuned by adjustment of the pressure in the accumulators.
  • FIG. I is a somewhat schematic view of mechanically driven apparatus according to the present invention.
  • FIG. 2 is a schematic view but showing a second embodiment of the invention in which the drive is hydraulic;
  • FIG. 3 is a view of a third embodiment in which the drive and driven members are concentric.
  • FIG. 4 is a side view of the general lay out of a cutter dredger.
  • the cutting device 1 and flywheel 3 are driven in the same direction at the same rotary velocity and may be said to be rotating in phase with each other.
  • the shaft 2 will twist and the cutting device 1 and flywheel 3 will shift out of phase to each other, with the flywheel 3 leading.
  • the cutting device and the flywheel mass will then vibrate in opposed phases, whereupon the shaft 2 has a torsional node at the point of application of drive train 4. Accordingly, the increased torque of portions of the system will not apply itself to the drive train 4.
  • FIG. 3 An advantageous device for embodying the present invention in a simple form is shown in FIG. 3, in which the shaft of the cutting device or of a member connected thereto is shown at 15 and has radially outwardly extending ribs 16 thereon.
  • the ribs 21 and 19 interfinger with wide clearance, as do the ribs 16 and 18, the latter defining chambers 22 and 23 therebetween and the former defining chambers 24 and 25 therebetween.
  • these chambers may be provided with resilient means such as rubber members or springs.
  • the ring 17 functions like the pump 7 in FIG. 2 while the member 15 functions like the motor 8, and the ring 20 functions like the motor 9 and flywheel 11.
  • the chambers 22-25 are connected to accumulators and the ribs that define these chambers form fluidtight partitions.
  • the ring 20 of course is free to vibrate with a higher angular speed than the shaft 15 and hence may be of a mass correspondingly reduced relative to the mass of the cutter.
  • FIG. 4 shows a ship 25, a suction tube 26, a cutter 27, a drive shaft 28 and an electro-motor 29.
  • a cutter dredger having a suction pipe and a rotating cutter adjacent the mouth of the pipe, the cutter being connected to a shaft having drive means for rotating the shaft, whereby the cutter and shaft together constitute a first vibrating system set into vibration during dredging; the improvement comprising a second vibrating system, means interconnecting said first and second vibrating systems, said first and second vibrating systems being tuned to each other to vibrate relative to each other in opposed phase with a point of vibration reversal on said interconnecting means, said drive means driving said first and second vibrating systems simultaneously from said point of vibration reversal.
  • said drive means comprising a hydraulic pump, a first hydraulic displacement motor driven by said pump to rotate said cutter, a second hydraulic displacement motor driven by said pump to rotate a mass in said second vibrating system, said pump and first and second motors being interconnected by a closed hydraulic circuit, and accumulators in said circuit between said pump and said first motor, between said pump and said second motor, and between said motors.
  • said yieldable means comprising hydraulic means including fluid pressure accumulators.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
US00093011A 1969-11-28 1970-11-27 Dredge cutter head with counterbalancing vibrating system Expired - Lifetime US3711968A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6917936A NL6917936A (enrdf_load_stackoverflow) 1969-11-28 1969-11-28

Publications (1)

Publication Number Publication Date
US3711968A true US3711968A (en) 1973-01-23

Family

ID=19808506

Family Applications (1)

Application Number Title Priority Date Filing Date
US00093011A Expired - Lifetime US3711968A (en) 1969-11-28 1970-11-27 Dredge cutter head with counterbalancing vibrating system

Country Status (6)

Country Link
US (1) US3711968A (enrdf_load_stackoverflow)
JP (1) JPS498535B1 (enrdf_load_stackoverflow)
BE (1) BE759516A (enrdf_load_stackoverflow)
DE (1) DE2059323C3 (enrdf_load_stackoverflow)
FR (1) FR2072538A5 (enrdf_load_stackoverflow)
NL (1) NL6917936A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4208928A (en) * 1977-03-30 1980-06-24 Carl Hasse & Wrede Gmbh Torsional balancer device having viscous damping agent
CN112095704A (zh) * 2020-09-09 2020-12-18 施红 一种挖方用滚刀驱动调节及过载保护系统

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US703817A (en) * 1900-11-06 1902-07-01 Atlantic Gulf And Pacific Company Dredger.
US1465024A (en) * 1921-02-14 1923-08-14 Fried Krupp Germaniawerft Ag Driving mechanism for marine propellers
DE473767C (de) * 1929-03-22 Luebecker Maschb Ges Saugkopf fuer Schwimmbagger mit vor der Saugoeffnung arbeitenden Grabwerkzeugen
US2632318A (en) * 1946-11-26 1953-03-24 Schweizerische Lokomotiv Universally movable coupling having a floating intermediate ring
US2955472A (en) * 1959-08-13 1960-10-11 Gen Precision Inc Damping control mechanism for fluid damped gyros
US2963801A (en) * 1956-12-03 1960-12-13 Ellicott Machine Corp Dredge ladder
US3263450A (en) * 1964-02-13 1966-08-02 Twin Disc Clutch Co Damping connector for a power train
GB1120538A (en) * 1965-10-01 1968-07-17 Baggermij Bos & Kalis Nv Improvements in or relating to suction dredgers

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE473767C (de) * 1929-03-22 Luebecker Maschb Ges Saugkopf fuer Schwimmbagger mit vor der Saugoeffnung arbeitenden Grabwerkzeugen
US703817A (en) * 1900-11-06 1902-07-01 Atlantic Gulf And Pacific Company Dredger.
US1465024A (en) * 1921-02-14 1923-08-14 Fried Krupp Germaniawerft Ag Driving mechanism for marine propellers
US2632318A (en) * 1946-11-26 1953-03-24 Schweizerische Lokomotiv Universally movable coupling having a floating intermediate ring
US2963801A (en) * 1956-12-03 1960-12-13 Ellicott Machine Corp Dredge ladder
US2955472A (en) * 1959-08-13 1960-10-11 Gen Precision Inc Damping control mechanism for fluid damped gyros
US3263450A (en) * 1964-02-13 1966-08-02 Twin Disc Clutch Co Damping connector for a power train
GB1120538A (en) * 1965-10-01 1968-07-17 Baggermij Bos & Kalis Nv Improvements in or relating to suction dredgers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4208928A (en) * 1977-03-30 1980-06-24 Carl Hasse & Wrede Gmbh Torsional balancer device having viscous damping agent
CN112095704A (zh) * 2020-09-09 2020-12-18 施红 一种挖方用滚刀驱动调节及过载保护系统

Also Published As

Publication number Publication date
FR2072538A5 (enrdf_load_stackoverflow) 1971-09-24
JPS498535B1 (enrdf_load_stackoverflow) 1974-02-27
BE759516A (fr) 1971-04-30
NL6917936A (enrdf_load_stackoverflow) 1971-06-02
DE2059323B2 (de) 1977-10-20
DE2059323C3 (de) 1978-06-08
DE2059323A1 (de) 1971-06-03

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