EP0018687B1 - Dredge pump set - Google Patents

Dredge pump set Download PDF

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Publication number
EP0018687B1
EP0018687B1 EP80200375A EP80200375A EP0018687B1 EP 0018687 B1 EP0018687 B1 EP 0018687B1 EP 80200375 A EP80200375 A EP 80200375A EP 80200375 A EP80200375 A EP 80200375A EP 0018687 B1 EP0018687 B1 EP 0018687B1
Authority
EP
European Patent Office
Prior art keywords
pump
shaft
fastened
dredge
motor
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
EP80200375A
Other languages
German (de)
French (fr)
Other versions
EP0018687A1 (en
Inventor
Nicolaas Frans Van Dee
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.)
Bv Beheermaatschappij T Den Breejen Van Den Bout
Original Assignee
Bv Beheermaatschappij T Den Breejen Van Den Bout
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 Bv Beheermaatschappij T Den Breejen Van Den Bout filed Critical Bv Beheermaatschappij T Den Breejen Van Den Bout
Publication of EP0018687A1 publication Critical patent/EP0018687A1/en
Application granted granted Critical
Publication of EP0018687B1 publication Critical patent/EP0018687B1/en
Expired legal-status Critical Current

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Classifications

    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps

Definitions

  • the invention relates to a submersible dredge pump set for a dredge craft, comprising a pump set having a shaft connected to a drive set a tubular carrier for the pump set and the drive set, in which the shaft side of the pump body is fastened to the one end of the tubular carrier in which the pump shaft and the drive set are housed, whereas the other end of the tubular carrier can be fastened to a support structure, which tubular carrier is provided with at least one support element, that extends from the inner wall of the tubular carrier in an inward direction and supports a bearing arrangement for the shaft.
  • Dredge pump sets of this type are described in "Ports and Dredging", nr. 86, 1975, “centrifugal dredge pumps”, nr. 7, pages 8, 9; fig. 13. They are adapted for use in submerged condition, such as part of a trailing suction tube.
  • This combination of a submersible pump and drive set has only one shaft, protruding from the specially built high torque electric water tight sealed motor which has on the pump side one single bearing. This bearing is part of the motor and not of the pump that has no own bearings.
  • the object of the invention is providing an improved dredge pump set of the type described in the preamble, said set having on the one hand such a shaft and bearing construction, that the shaft and bearings are substantially uninfluenced by bending forces on the dredge pump set and originate from the suction tube fastened to the pump inlet and are on the other hand easy replaceable so that the labour and the down time for replacement are substantially reduced.
  • said pump shaft is independent from the motor shaft of the drive set and said shafts are connected by a flexurally elastic coupling and that two or more bearings for the pump shaft are housed in a tubular bearing body of which both ends are sealed, and at least two support elements are fastened to the outside of the tubular bearing body.
  • the pump shaft and the motor shaft need not be exactly aligned, whereas the bending loads on the suction end of the pump body and other bending forces due to hoisting and lowering the suction pipe and to the water currents are not transmitted to the bearings of the pump shaft and the motor shaft, so that the life of these components is substantially enlarged. Furthermore this structure allows an easy and fast replacement of the worn out components.
  • the dredge pump set comprises a dredge pump, which is generally indicated with 1, and a drive set, which is generally indicated with 2.
  • the dredge pump 1 has been provided with a volute body 3, in which a suitable, rotating impeller 12 is arranged.
  • a closing lid 4 is present, with a fastening flange 5, which can be fastened together with the end flange 37 of the tube 38 by means of (non shown) bolts to the edge flange 6 of the volute body 3.
  • the closing lid 4 has also been provided with a tube end 7 having a fastening flange 8 for fastening the suction tube 9 of which only the end is shown.
  • volute body 3 has also been provided with a fastening flange 10, for the edge flange 11 of the pump lid 13 and the end flange 14 of the tubular carrier which supports the pump set and the drive set.
  • This tubular carrier consists of the bearing part 15, that is shown at the left side of the drawing and has a continuous round diameter and the motor part 16 that is shown at the right side of the drawing, that has at its end being connected to the bearing part 15 a round diameter and its right outer end an oblong rounded form.
  • the impeller 12 is fastened on the one end of the pump shaft 17, which shaft 17 extends through the pump lid 13 there having a shaft sealing 18, after which the pump shaft extends through the next shaft sealing 19 into a tubular bearing body 20.
  • this tubular bearing body 20 a number of bearings have been fastened, such as the radial bearings 21 and 22, at both sides of the bearing body 20, and the axial thrust bearing 23.
  • the bearing body 20 has been fastened by means of the diametrally extending supports 24 and 25 in a central position inside the bearing part 15 of the tubular carrier.
  • the shaft 26 is fastened of the rotating hydraulic motor 27.
  • This motor 27 is at its end turned away from the shaft side fastened to a motor support 28, which extends from the right, oblong rounded end flange 29 of the motor part 16 of the tubular carrier to the left side and is reinforced by means of the reinforcement plates 30.
  • the pressure outlet tube 31 of the volute pump body 3 carries a fastening flange 32, on which the pertaining flange 33 is fastened of a bend piece 34 that is bent in two dimensions, whereas the other end flange 35 of this bend piece 34 lies in the same place as, but at the upper side of the end flange 29 of the motor part 16. of the tubular carrier 2.
  • the end flange 29 can be fastened to a carrying piece that is mounted as an extension of a (non shown) pressure tube line, whereas the end flange 35 can be fastened to a (non shown) reducer of this pressure line, of which the axis coincides with that of the motor 27, pump shaft 17 and impeller 12.
  • Oblong rounded means two parallel sides with half circles at the end.
  • a hydraulic motor instead of a hydraulic motor also an electric or an air motor can be used or another prime mover.
  • the dredge pump set according to the invention is in the first palce intended for use in the submerged trailing suction tube of a dredge craft, it can also be applied in the under water suction line of a cutter head-suction dredge craft or on board of other dredge crafts.

Description

  • The invention relates to a submersible dredge pump set for a dredge craft, comprising a pump set having a shaft connected to a drive set a tubular carrier for the pump set and the drive set, in which the shaft side of the pump body is fastened to the one end of the tubular carrier in which the pump shaft and the drive set are housed, whereas the other end of the tubular carrier can be fastened to a support structure, which tubular carrier is provided with at least one support element, that extends from the inner wall of the tubular carrier in an inward direction and supports a bearing arrangement for the shaft.
  • Dredge pump sets of this type are described in "Ports and Dredging", nr. 86, 1975, "centrifugal dredge pumps", nr. 7, pages 8, 9; fig. 13. They are adapted for use in submerged condition, such as part of a trailing suction tube. This combination of a submersible pump and drive set has only one shaft, protruding from the specially built high torque electric water tight sealed motor which has on the pump side one single bearing. This bearing is part of the motor and not of the pump that has no own bearings. Thus the pump impeller is supported cantilevered on a longer protruding shaft so that during the operation caused by the suction pipe fastened to the other side of the pump deflections occur which lead to a fast wear of this one single bearing. When this one single bearing is worn the complete electric motor must be replaced which is a costly operation: For this reasons this type of submerged dredge pump set has up to now only been applied on a heavy foundation that precludes deflections that might damage the one single bearing of the protruding motor shaft. This bearing has to be repaired by the manufacturer of the electric motor ashore, as this repair can not be made on board the dredging vessel.
  • The object of the invention is providing an improved dredge pump set of the type described in the preamble, said set having on the one hand such a shaft and bearing construction, that the shaft and bearings are substantially uninfluenced by bending forces on the dredge pump set and originate from the suction tube fastened to the pump inlet and are on the other hand easy replaceable so that the labour and the down time for replacement are substantially reduced.
  • This object is reached according to the invention, in that said pump shaft is independent from the motor shaft of the drive set and said shafts are connected by a flexurally elastic coupling and that two or more bearings for the pump shaft are housed in a tubular bearing body of which both ends are sealed, and at least two support elements are fastened to the outside of the tubular bearing body.
  • By application of the invention there is reached, that the pump shaft and the motor shaft need not be exactly aligned, whereas the bending loads on the suction end of the pump body and other bending forces due to hoisting and lowering the suction pipe and to the water currents are not transmitted to the bearings of the pump shaft and the motor shaft, so that the life of these components is substantially enlarged. Furthermore this structure allows an easy and fast replacement of the worn out components.
  • The invention will now be further elucidated referring to the accompanying drawing of an embodiment.
    • Fig. 1 shows a longitudinal cross section of the dredge pump set according to the invention.
    • Fig. 2 shows a plane view of the dredge pump set according to fig. 1.
  • According to the drawing the dredge pump set comprises a dredge pump, which is generally indicated with 1, and a drive set, which is generally indicated with 2. The dredge pump 1 has been provided with a volute body 3, in which a suitable, rotating impeller 12 is arranged. At the inlet side a closing lid 4 is present, with a fastening flange 5, which can be fastened together with the end flange 37 of the tube 38 by means of (non shown) bolts to the edge flange 6 of the volute body 3. The closing lid 4 has also been provided with a tube end 7 having a fastening flange 8 for fastening the suction tube 9 of which only the end is shown. At the shaft side the volute body 3 has also been provided with a fastening flange 10, for the edge flange 11 of the pump lid 13 and the end flange 14 of the tubular carrier which supports the pump set and the drive set. This tubular carrier consists of the bearing part 15, that is shown at the left side of the drawing and has a continuous round diameter and the motor part 16 that is shown at the right side of the drawing, that has at its end being connected to the bearing part 15 a round diameter and its right outer end an oblong rounded form. The impeller 12 is fastened on the one end of the pump shaft 17, which shaft 17 extends through the pump lid 13 there having a shaft sealing 18, after which the pump shaft extends through the next shaft sealing 19 into a tubular bearing body 20. In this tubular bearing body 20 a number of bearings have been fastened, such as the radial bearings 21 and 22, at both sides of the bearing body 20, and the axial thrust bearing 23. The bearing body 20 has been fastened by means of the diametrally extending supports 24 and 25 in a central position inside the bearing part 15 of the tubular carrier.
  • At the other end of the pump shaft 17 via the flexurally elastic coupling 36 the shaft 26 is fastened of the rotating hydraulic motor 27. This motor 27 is at its end turned away from the shaft side fastened to a motor support 28, which extends from the right, oblong rounded end flange 29 of the motor part 16 of the tubular carrier to the left side and is reinforced by means of the reinforcement plates 30.
  • The pressure outlet tube 31 of the volute pump body 3 carries a fastening flange 32, on which the pertaining flange 33 is fastened of a bend piece 34 that is bent in two dimensions, whereas the other end flange 35 of this bend piece 34 lies in the same place as, but at the upper side of the end flange 29 of the motor part 16. of the tubular carrier 2. The end flange 29 can be fastened to a carrying piece that is mounted as an extension of a (non shown) pressure tube line, whereas the end flange 35 can be fastened to a (non shown) reducer of this pressure line, of which the axis coincides with that of the motor 27, pump shaft 17 and impeller 12. Oblong rounded means two parallel sides with half circles at the end.
  • Instead of a hydraulic motor also an electric or an air motor can be used or another prime mover. Although the dredge pump set according to the invention is in the first palce intended for use in the submerged trailing suction tube of a dredge craft, it can also be applied in the under water suction line of a cutter head-suction dredge craft or on board of other dredge crafts.

Claims (5)

1. Submersible dredge pump set for a dredge craft, comprising a pump set having a shaft (17) connected to a drive set, a tubular carrier (15, 16) for the pump set (1) and the drive set (2), in which the shaft side of the pump body is fastened to the one end of the tubular carrier in which the pump shaft and the drive set are housed, whereas the other end of the tubular carrier can be fastened to a support structure, which tubular carrier is provided with at least one support element (24, 25), that extends from the inner wall of the tubular carrier in an inward direction and supports a bearing arrangement for the shaft characterized in that said pump shaft (17) is independent from the motor shaft (26) of the drive set and said shafts (17, 26) are connected by a flexurally elastic coupling (36) and that two or more bearings (21, 22, 23) for the pump shaft (17), are housed in a tubular bearing body (20) of which both ends are sealed, and at least two support elements (24, 25) are fastened to the outside of the tubular bearing body (20).
2. The dredge pump set according to claim 1 characterized in that, the motor (27) of the drive set is fastened to a motor support (28, 30), that is mounted at the end of the tubular carrier (16) remote from the pump body (3).
3. The dredge pump set according to claims 1-2, characterized in that a closing flange (11) at the shaft side of the pump body (3) is fastened to a pertaining end flange (14) of the tubular carrier (15).
4. The dredge pump set according to claims 1-3, characterized in that, the drive set comprises a hydraulic motor (27).
5. The dredge pump set according to claims 1-3, characterized in that, the drive set comprises an air motor (27).
EP80200375A 1979-04-25 1980-04-24 Dredge pump set Expired EP0018687B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL7903272 1979-04-25
NL7903272A NL7903272A (en) 1979-04-25 1979-04-25 DREDGE PUMP AGGREGATE.

Publications (2)

Publication Number Publication Date
EP0018687A1 EP0018687A1 (en) 1980-11-12
EP0018687B1 true EP0018687B1 (en) 1984-01-18

Family

ID=19833053

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80200375A Expired EP0018687B1 (en) 1979-04-25 1980-04-24 Dredge pump set

Country Status (3)

Country Link
EP (1) EP0018687B1 (en)
DE (1) DE3066132D1 (en)
NL (1) NL7903272A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106120923B (en) * 2016-08-24 2018-07-20 浙江义海航道工程有限公司 It is a kind of large-scale from boat hydraulic suction dredge

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7900925A (en) * 1979-02-06 1980-08-08 Breejen Beheer VACUUM DREDGING VESSEL.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1638387A (en) * 1921-01-07 1927-08-09 Baldwin James Edward Submersible pump
GB556853A (en) * 1942-11-11 1943-10-25 William Ernest Wyatt Millingto Improvements in and relating to centrifugal pumps
NL6813407A (en) * 1968-09-19 1970-03-23
US3639019A (en) * 1969-07-01 1972-02-01 Schaeffler Ohg Industriewerk Radial ball bearings
BE756152A (en) * 1969-09-16 1971-02-15 Wernert & Cy K G H CENTRIFUGAL PUMP
GB1395157A (en) * 1971-08-05 1975-05-21 Ransome Hoffmann Pollard Integral shaft bearing and seal assembly

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7900925A (en) * 1979-02-06 1980-08-08 Breejen Beheer VACUUM DREDGING VESSEL.

Also Published As

Publication number Publication date
DE3066132D1 (en) 1984-02-23
NL7903272A (en) 1980-10-28
EP0018687A1 (en) 1980-11-12

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