EP0775066A1 - Propulsion a jet d'eau - Google Patents

Propulsion a jet d'eau

Info

Publication number
EP0775066A1
EP0775066A1 EP95929861A EP95929861A EP0775066A1 EP 0775066 A1 EP0775066 A1 EP 0775066A1 EP 95929861 A EP95929861 A EP 95929861A EP 95929861 A EP95929861 A EP 95929861A EP 0775066 A1 EP0775066 A1 EP 0775066A1
Authority
EP
European Patent Office
Prior art keywords
water
impeller
water jet
ship
outlet
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.)
Withdrawn
Application number
EP95929861A
Other languages
German (de)
English (en)
Inventor
Uwe GRÄGEN
Reinhold Reuter
Stefan Kaul
Stefan Huth
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.)
Schottel GmbH and Co KG
Original Assignee
Schottel GmbH and Co KG
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 Schottel GmbH and Co KG filed Critical Schottel GmbH and Co KG
Publication of EP0775066A1 publication Critical patent/EP0775066A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H11/00—Marine propulsion by water jets
    • B63H11/02—Marine propulsion by water jets the propulsive medium being ambient water
    • B63H11/10—Marine propulsion by water jets the propulsive medium being ambient water having means for deflecting jet or influencing cross-section thereof
    • B63H11/101—Marine propulsion by water jets the propulsive medium being ambient water having means for deflecting jet or influencing cross-section thereof having means for deflecting jet into a propulsive direction substantially parallel to the plane of the pump outlet opening
    • B63H11/102—Marine propulsion by water jets the propulsive medium being ambient water having means for deflecting jet or influencing cross-section thereof having means for deflecting jet into a propulsive direction substantially parallel to the plane of the pump outlet opening the inlet opening and the outlet opening of the pump being substantially coplanar
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H11/00—Marine propulsion by water jets
    • B63H11/02—Marine propulsion by water jets the propulsive medium being ambient water
    • B63H11/04—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps
    • B63H11/08—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps of rotary type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/04—Helico-centrifugal 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/406—Casings; Connections of working fluid especially adapted for liquid 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps

Definitions

  • the invention relates to a so-called pot pump, i.e. a water jet drive with the following features.
  • a semi-axially inspected pump or impeller is rotatably arranged with a vertical axis of rotation in a well-shaped pump housing.
  • the drive for the impeller is inserted into the pump housing from above through a screw plate.
  • the housing is closed by a base plate, which has a water inlet arranged in the middle for the axial flow against the impeller and at least one gently sloping water outlet.
  • Exit end of the delivery channels of the impeller and the at least one water outlet is arranged a diffuser.
  • This diffuser is generally a bladed annular channel arranged between the pump housing and the impeller housing, concentric to the impeller axis, in which the flow from the semi-axial direction
  • the cross-sectional profile of the ring channel can in principle be constant or decrease in the direction of flow or increase in the direction of flow depending on the result that is expected from one or the other measure.
  • the entire pump can be pivoted through 360 ° about the longitudinal and rotational axis of the impeller.
  • the outlet direction of the nozzle changes, the water jet emerging from it changes its outlet or.
  • Direction of flow and the watercraft changes its direction of travel.
  • a disadvantage of this solution is that the entire pump has to be swiveled and therefore a relatively large mass has to be moved if the direction of travel of the ship is to be changed. This requires a high expenditure of energy and places high demands on the swivel mechanism if great precision is required during the adjustment process, which is necessary for exact ship guidance.
  • the aforementioned pot pump was therefore further developed in such a way that the actual pump housing with a cylindrical housing part and cover as load-bearing elements in the construction of the watercraft is included and only the base plate with water inlet and water outlet can be pivoted through 360 ° about the axis of rotation of the pump (EP0464739A1).
  • the implementation of this solution in practice presupposes the solution of the problem of the seal between the actual pump housing integrated in the watercraft as a load-bearing element and the pivotable base plate.
  • this solution has the advantage over the first-mentioned embodiment of the pot pump that substantially smaller masses have to be moved to maneuver the watercraft, namely only the base plate, where in the first case the entire housing including the base plate has to be pivoted.
  • the present invention is now intended to improve this prior art in such a way that the drive or the pot pump itself is as light as possible and the mass to be pivoted for maneuvering the watercraft is also further reduced.
  • the present The object on which the invention is based can therefore be defined in such a way that a pot pump of the type under discussion itself should have the lowest possible weight and that the smallest possible masses must be moved if the pot pump is to be used not only to propel a watercraft, but this watercraft should also be controlled with regard to its direction of travel.
  • the use according to the invention of an unspeaked diffuser between the pump outlet and the pressure pot serves.
  • the guide apparatus In order to be able to represent the desired flow conditions between the impeller and pressure pot, the guide apparatus must provide a relatively larger flow path and this is the case if it deflects the delivery quantities leaving the impeller in a semi-axial direction to such an extent that they flow between the suction direction of the
  • Geometry of the inner and outer wall of the diffuser makes it possible to reduce the flow energy that is inherent in the water when leaving the impeller so much that the pumped water just flows, but it also has a high pressure energy, so that the pressure pot has a high pressure Ultimate pressure at the nozzle outlet the desired high pressure can be built up.
  • the flow channel cross-section in the flow direction can basically also remain the same, increase or decrease, depending on the employment relationships to be created, even with the unspeared diffuser. If it is The aim is to build up the desired high pressure in the pressure pot in an optimal manner, a guide device with a channel cross-section widening in the flow direction, which is therefore a diffuser, is to be preferred, whereby
  • the initial cross-section results from the conditions at the end of the impeller, the final cross-section from the condition that the flow conditions just cause the conveyed water to enter the pressure pot, otherwise the pressure energy should be high and finally
  • the cross sections between the end cross sections are dimensioned such that the conversion of flow energy into pressure energy takes place continuously without separation of the flow from the flow channel wall, because such separation would result in the formation of eddies and thus loss of energy. How these conditions can be met is known to the person skilled in the art, it can be done empirically or with the aid of calculation methods known to the person skilled in the art.
  • the paddle-less guide with a flow channel widening in the direction of flow to an impeller in which there is already an extensive conversion of flow energy into pressure energy.
  • the flow channels between a pair of blades and the two cover plates of the impeller should have smaller cross-sections at the beginning than at the end, the flow channels should continue in the direction of flow
  • the feature of the invention is proposed from the point of view of structural simplicity and the lowest possible weight that in the rest of the stationary drive, i.e. neither the entire housing nor the base plate alone should be pivotable about the axis of rotation of the impeller, only the at least one nozzle should be pivotable relative to the housing.
  • the watercraft is therefore controlled with the smallest possible adjustable masses.
  • FIG. 1A shows a corresponding longitudinal section through a slightly modified embodiment, the sectional plane including the sectional plane of FIG. 1 including an angle of 90 °;
  • FIG. 1B shows a part of one of the outlet nozzles of the pressure pot as a section
  • Fig. 2,3 installation examples as a schematic side view
  • water jet propulsion includes the use of a pot pump as a means for propelling a watercraft, ie a ship;
  • FIG. 4 shows a schematic representation of a nozzle that is pivotally installed in its entirety as a side view
  • Fig. 5 in a representation corresponding to Fig. 4 a fixed nozzle with control flap.
  • FIG. 6 shows a nozzle according to the invention in a representation corresponding to FIG. 1 with the possibility of deflecting the thrust jet by up to 180 °;
  • Fig. 7 shows the design of FIG. 6 as a top view.
  • Water jet drive are the pot-shaped pump housing 1, the semi-axially extending blade or flow channels between its blades 2 and the two cover plates 3a, 3b forming pump impeller 3, the drive 4 of the impeller, the guide device 5 and a lower cover plate 6, in which in the Middle of the water jet inlet 7 is integrated.
  • An inlet grille 11 can be provided in the inlet 7 in order to prevent the suction of objects which could damage the impeller 3, a danger to which the drive is particularly exposed due to the use of the watercraft in shallow waters (FIG. 1). If necessary, however, an entry grille can also be dispensed with.
  • “Semi-axially bladed” means that the impeller 3 is flowed essentially axially (arrows 100) and the water provided with flow energy that Leaves the impeller 3 and enters the diffuser 5 at an angle ⁇ which is less than 90 ° with respect to the impeller axis of rotation (arrows 200).
  • the drive 4 can be conventional, so that its description can be omitted.
  • the drive is shown schematically as a section, in Figure 1A only the drive shaft 4a leading to the impeller 3 is shown of the drive.
  • the drive is placed on an upper cover 21 of the pump house 1 and projects into the pump housing in order to be non-rotatably connected to the impeller 3 there. It can, for example, be the same as the drive provided in DE-A 40 21 340.
  • the relatively wide-meshed inlet grille 11 can be arranged, which can be relatively wide-meshed because the drive is less sensitive to foreign particles carried in the water due to the lack of a bladed guide apparatus than a drive with a bladed guide apparatus (in particular Fig. 1A).
  • the diffuser is a non-bladed ring diffuser with an exit angle ⁇ to the impeller axis 22, the one
  • the ring channel or diffuser 5 is formed directly on the outside by the housing outer wall 12 and on the inside by the impeller housing 13. It is rotationally symmetrical and has no internals. It ensures a long lead to
  • the cross-sectional profile of the guide apparatus can be constant, decreasing or, preferably, increasing, when it comes to the flow energy prevailing at the end of the impeller 3 as much as possible
  • Is ring diffuser The flow generated in the pump emerges from the housing 1 or the pressure pot 23 from at least one nozzle 8 arranged in the rear housing wall.
  • the nozzle 8 The nozzle
  • the nozzle 8 is permanently installed in the pump housing
  • this nozzle in the modified form marked 10, a
  • Nozzle 10 can be assigned or this nozzle can be in its
  • the beam deflection valve is characterized by broken lines in its non-functional setting, and by solid lines in its position causing the beam deflection.
  • the deflection flap 17 is held in a frame 18 which is pivotally mounted on the housing 1 on lateral pins 19 and the pivotability is in turn effected by an adjusting device 20.
  • the water jet drive designed according to the invention thus represents a thrust-improved version.
  • a rigid, rearward-directed nozzle 8 is to be assigned to the pump housing 1 in the case of a medium drive B.
  • the longitudinal axis of the nozzle coincides with the longitudinal axis of the ship in plan view.
  • the middle drive B is a non-controllable "booster", which is used exclusively for propulsion of the ship, the longitudinal axis of the
  • nozzle does not coincide with the longitudinal axis of the ship, it should be arranged at least parallel to the longitudinal axis of the ship.
  • Two lateral, controllable drives SA1 and SA2 arranged symmetrically to the ship's longitudinal axis are basically the same as the middle drive B, but their outlet nozzles 10a, 10b are designed such that their outlet direction can be adjusted in order to be able to steer the ship. This can be achieved in that the
  • Nozzle 10a or 10b in its entirety is arranged pivotably in the respective pump housing 1 (FIG. 4).
  • An alternative is an outlet nozzle (10a, 10b) which is rigidly arranged in the pump housing 1, but which has at least one rotatable or pivotable deflection plate 16 within the fixed one
  • the middle booster B can, for example, also correspond to the side drives SA1 and SA2 in order to obtain a better control effect, ie all three drives can be designed according to one of FIGS. 4, 5, 6 and 7. In order to meet other operating requirements, the booster can also be designed according to FIG. 4 or FIG. 5 and the lateral drives SA1, SA2 may be designed according to FIGS.
  • the central drive B can also be designed according to one of FIGS. 4 and 6 or 7 and the lateral drives SA1 and SA2 can be designed to be controllable all round.
  • the drive according to the invention is independent of it
  • the complex control for all-round controllability is eliminated and is replaced by simple hydraulic or mechanical slides or the like (20).
  • the base plate is designed as a simple, closed container base, which only surrounds the central suction opening.
  • the drive according to the invention develops a good thrust due to the simple flow guidance and the relatively high efficiency of the rear nozzle.
  • the drive according to the invention is designed in particular for use in conjunction with control drives with high maneuverability, the drive at hand being limited by the good thrust values at the same time
  • the end edges of the flow channels of the impeller 3 are characterized by the trailing edges 24 of the impeller blades 2. This simultaneously marks the entry into the diffuser 5, the end of which is marked 25, which in turn also marks the entry of the water conveyed by the impeller 3 and directed in the diffuser 5 into the pressure pot 23.
  • the central nozzle 8 is connected to the pressure pot 23
  • Flow channels in the impeller is such that the water sucked in the impeller experiences an acceleration and a pressure increase, so that it has a high energy content at the outlet from the impeller, consisting of a larger proportion of pressure energy and a smaller proportion of kinetic energy, which in the outlet from the
  • the diffuser is also largely converted into pressure energy, whereby during the flow from the entry into the flow channels of the impeller (edges 24a) to the exit from the diffuser (end of the diffuser
  • FIG. 1B shows a nozzle representation, as is also shown in FIG. 13. Basically, it can be both a rigid central nozzle used as a booster and one of the side control nozzles.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Hydraulic Turbines (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

Une propulsion à jet d'eau pour bateaux destinés à naviguer même en eaux peu profondes comprend une roue de pompage (3) qui aspire l'eau dans le sens vertical et est pourvue d'aubes qui laissent s'écouler l'eau dans une certaine direction, entre la verticale et l'horizontale. L'eau qui sort par le canal d'écoulement de la roue de pompage parvient à un diffuseur annulaire (5) dépourvu d'aubes qui fait pénétrer l'eau refoulée par la roue de pompage dans une chambre de compression (23), après l'avoir déviée de 160° à 200° (de préférence 180°) par rapport à la direction d'aspiration. L'eau ne présente encore qu'une faible énergie d'écoulement et sort finalement de la chambre de compression par des tuyères (8) dont la direction de décharge est fixe ou variable.
EP95929861A 1994-08-13 1995-08-13 Propulsion a jet d'eau Withdrawn EP0775066A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4428748 1994-08-13
DE19944428748 DE4428748A1 (de) 1993-02-20 1994-08-13 Wasserstrahlantrieb
PCT/EP1995/003209 WO1996005098A1 (fr) 1994-08-13 1995-08-13 Propulsion a jet d'eau

Publications (1)

Publication Number Publication Date
EP0775066A1 true EP0775066A1 (fr) 1997-05-28

Family

ID=6525635

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95929861A Withdrawn EP0775066A1 (fr) 1994-08-13 1995-08-13 Propulsion a jet d'eau

Country Status (7)

Country Link
EP (1) EP0775066A1 (fr)
JP (1) JPH10504779A (fr)
CN (1) CN1157600A (fr)
DE (1) DE4428748A1 (fr)
FI (1) FI970597A (fr)
NO (1) NO970644D0 (fr)
WO (1) WO1996005098A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19905141B4 (de) * 1998-02-10 2004-08-12 Kawasaki Jukogyo K.K., Kobe Vertikale Wasserstrahlantriebsvorrichtung
NL1013192C2 (nl) * 1999-10-01 2001-04-03 Holland Roerpropeller B V Waterstraalvoortstuwingsinstallatie.
CN105782110B (zh) 2007-05-21 2018-07-17 伟尔矿物澳大利亚私人有限公司 泵的改进和与泵有关的改进
JP5634873B2 (ja) * 2007-12-05 2014-12-03 ショッテル ゲゼルシャフトミットベシュレンクターハフトゥング ポンプジェットを有する船推進システム
EP2194231A1 (fr) * 2008-12-05 2010-06-09 Siemens Aktiengesellschaft Diffuseur annulaire pour une turbomachine axiale
CN103085957A (zh) * 2009-09-11 2013-05-08 赵明 卧式双圆弧齿轮轮泵用于高速船
CN106984211B (zh) * 2017-06-08 2022-10-21 湖北华凯能源股份有限公司 潜水式污泥搅拌器
CN110844035B (zh) * 2019-11-21 2024-07-23 福安阿米山科技有限公司 一种阻力回收节能船
ES1286659Y (es) * 2021-10-25 2022-05-09 Sedeno Jordi Monfort Dispositivo propulsor
CN115924047A (zh) * 2022-11-28 2023-04-07 中国船舶集团有限公司第七○八研究所 一种上装式全回转喷水推进器水动力结构

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB140985A (en) * 1919-11-04 1920-04-08 James Herbert Wainwright Gill Improvements in or relating to the propulsion and manoeuvring of vessels
GB210930A (en) * 1922-12-14 1924-02-14 James Herbert Wainwright Gill Improvements in or relating to the manoeuvring or steering of ships and other vessels
DE1150003B (de) * 1959-03-26 1963-06-06 Dowty Technical Dev Ltd Boot mit Aussenbordantriebsvorrichtung
DE7009393U (de) * 1969-03-17 1970-09-03 Whiteman James Leighton Dennet Antriebsvorrichtung fuer boote.
US3943876A (en) * 1973-12-06 1976-03-16 Kiekhaefer Aeromarine Motors, Inc. Water jet boat drive
DE3334254A1 (de) * 1983-09-22 1985-04-18 Kresimir Dipl.-Ing. 2850 Bremerhaven Kusan Bugstrahler zum steuern, bremsen und antreiben eines schiffes
DE3735699C2 (de) * 1987-10-22 1999-08-26 Schottel Werft Wasserstrahlantrieb für Wasserfahrzeuge
DE4021340A1 (de) * 1990-07-04 1992-01-09 Schottel Werft Wasserstrahlantrieb fuer schiffe, die zum einsatz in flachen gewaessern bestimmt sind
DE4305267A1 (de) * 1993-02-20 1994-08-25 Schottel Werft Wasserstrahlantrieb

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9605098A1 *

Also Published As

Publication number Publication date
NO970644L (no) 1997-02-12
CN1157600A (zh) 1997-08-20
JPH10504779A (ja) 1998-05-12
FI970597A (fi) 1997-04-09
WO1996005098A1 (fr) 1996-02-22
DE4428748A1 (de) 1996-02-15
FI970597A0 (fi) 1997-02-12
NO970644D0 (no) 1997-02-12

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