DE1292029B - Device for reducing the frictional resistance of ships - Google Patents

Device for reducing the frictional resistance of ships

Info

Publication number
DE1292029B
DE1292029B DEB86041A DEB0086041A DE1292029B DE 1292029 B DE1292029 B DE 1292029B DE B86041 A DEB86041 A DE B86041A DE B0086041 A DEB0086041 A DE B0086041A DE 1292029 B DE1292029 B DE 1292029B
Authority
DE
Germany
Prior art keywords
ship
collecting vessel
compressor
reducing
ships
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.)
Pending
Application number
DEB86041A
Other languages
German (de)
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.)
BECHE
HANS DIPL ING
Original Assignee
BECHE
HANS DIPL ING
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 BECHE, HANS DIPL ING filed Critical BECHE
Priority to DEB86041A priority Critical patent/DE1292029B/en
Publication of DE1292029B publication Critical patent/DE1292029B/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/32—Other means for varying the inherent hydrodynamic characteristics of hulls
    • B63B1/34—Other means for varying the inherent hydrodynamic characteristics of hulls by reducing surface friction
    • B63B1/38—Other means for varying the inherent hydrodynamic characteristics of hulls by reducing surface friction using air bubbles or air layers gas filled volumes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T70/00—Maritime or waterways transport
    • Y02T70/10—Measures concerning design or construction of watercraft hulls

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

Die Erfindung betrifft eine Einrichtung zur Herabsetzung des Reibungswiderstandes von Schiffen, bei welchen eine Luftschicht unter dem Schiffsboden entlangläuft, die von einem Verdichter durch Auslaßöffnungen am Bug unter den Schiffsboden gedrückt wird und am Heck durch Lochbleche wieder in das Leitungssystem im Schiff eintritt.The invention relates to a device for reducing frictional resistance of ships with a layer of air running under the bottom of the ship, pressed by a compressor through outlet openings in the bow under the ship's bottom and re-enters the ship's piping system through perforated sheets at the stern.

Das Umlaufen einer Luftschicht unter dem Boden eines Schiffes zum Zweck der Herabsetzung des Reibungswiderstandes im Wasser, wobei diese Luftschicht am Bug des Schiffes austritt, am Heck des Schiffes wieder aufgefangen und von einem Verdichter wieder zum Bug des Schiffes gedrückt wird, ist bekannt.Circulating a layer of air under the bottom of a ship for Purpose of reducing the frictional resistance in the water, this layer of air escapes at the bow of the ship, caught again at the stern of the ship and by one Compressor is pushed back to the bow of the ship is known.

Ein Nachteil dieser bekannten Anordnung ist, daß eine saubere Trennung der unter dem Schiff herlaufenden Luft beim Wiedereintritt im Heck in das Umlaufsystem von mitgerissenen Wasserteilen nicht erfolgt und daß keine Gewähr dafür gegeben ist, daß außerdem Wasser in der Ansaugleitung der Luft im Heck hochsteigt und zur- Zerstörung des Umlaufverdichters führt.A disadvantage of this known arrangement is that a clean separation the air flowing under the ship when it re-enters the circulation system in the stern of entrained water does not take place and that no guarantee is given is that water also rises in the air intake line in the stern and returns Destruction of the rotary compressor leads.

Durch die Erfindung soll daher die Aufgabe gelöst werden, aus der wiederaufgefangenen Luft das mitgerissene Wasser abzuscheiden und zu verhindern, daß Wasser in den Ansaugstutzen des Verdichters übertreten kann.The invention is therefore intended to solve the problem from which recaptured air to separate the entrained water and prevent it, that water can enter the intake port of the compressor.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß zwischen den Eintrittsöffnungen und dem Umlaufverdichter ein bekanntes Sammelgefäß angeordnet ist, in welchem ein Betriebswiderstand herrscht, der vom Boden des Schifes gerechnet nur einem Bruchteil des Tiefgangs des Schiffes entspricht, und in der Verbindungsleitung zwischen Sammelgefäß und Umlaufverdichter eine Drosselklappe vorgesehen ist, die von einem auf dem Wasserspiegel des Sammelgefäßes liegenden Schwimmer betätigt wird.This object is achieved in that between the Inlet openings and the rotary compressor arranged a known collecting vessel is in which there is an operating resistance calculated from the bottom of the ship corresponds to only a fraction of the draft of the ship, and in the connecting line A throttle valve is provided between the collecting vessel and the circulation compressor, which is operated by a float lying on the water level of the collecting vessel.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung schematisch dargestellt.An embodiment of the invention is shown schematically in the drawing shown.

Im Heck des Schiffes ist ein Sammelgefäß b vorgesehen, in das die unter dem Schiffsboden herlaufende Luft durch Schlitze g hochsteigt.In the stern of the ship, a collecting vessel b is provided in which the Air running under the ship's bottom rises through slits g.

In diesem Sammelgefäß steht das Wasser im Normalbetriebszustand etwa bis zur Linie z -z. Die Trennung von Wasser und Lust tritt hier ein.In this collecting vessel, the water is approximately in the normal operating state to the line z -z. The separation of water and pleasure occurs here.

Die Inbetriebnahme der Anordnung geschieht wie folgt: Das Schiff hat Fahrt angenommen. Der Zusatzverdichter a wird angestellt, er drückt das bis zur Linie y-y stehende Wasser aus den Schlitzen f, g hinaus, ebenso aus dem Sammelgefäß b, da die Drosselklappe d nicht völlig dicht schließt. Der Schwimmer c fällt bis zur Linie z-z. Der Umlaufverdichter h wird angestellt, er saugt Luft aus dem Sammelgefäß und sorgt für eine genügend starke Luftschicht unter dem Schiffsboden. Bis diese erreicht ist, sorgt der Schwimmer c im Sammelgefäß b für ein relativ geringes Schwanken (Steigen) des Wasserstandes über die Linie z-z hinaus, indem er durch teilweises Schließen der Drosselklappe d die Ansaugmenge des Umlaufverdichters h verringert.The commissioning of the arrangement takes place as follows: The ship has Journey accepted. The additional compressor a is turned on, it pushes it up to Line y-y standing water out of the slots f, g, also out of the collecting vessel b, because the throttle valve d does not close completely tight. The float c falls up to line z-z. The circulation compressor h is switched on, it sucks air from the collecting vessel and ensures a sufficiently strong layer of air under the ship's bottom. Until this one is reached, the float c in the collecting vessel b ensures a relatively small fluctuation (Rising) the water level above the line z-z by passing through partial Closing the throttle valve d reduces the intake volume of the rotary compressor h.

Im normalen Betriebszustand laufen beide Verdichter h, a. Zuviel unter den Schiffsboden geförderte Luft tritt bei den Lochreihen i, i der äußeren Stegbleche k, k aus.In the normal operating state, both compressors h, a run. Too much air conveyed under the ship's bottom escapes from the rows of holes i, i in the outer web plates k, k .

In bekannter Weise sind durchlaufende Mittel-Stegbleche in geeigneten Abständen unter dem Schiffsboden vorgesehen.In a known manner, continuous central web plates are suitable Clearances provided under the ship's bottom.

Tritt stärkerer Luftverlust etwa durch starke Rollbewegungen des Schiffes auf, so sorgt der Schwimmer c für relativ geringes Schwanken (Steigen) des Wasserstandes im Sammelgefäß b, indem er durch mehr oder weniger starkes Schließen der Drosselklappe d die Ansaugmenge des Umlaufverdichters h verringert. Ein unzulässiges Steigen des Wassers im Sammelgefäß ist nicht möglich.If there is a greater loss of air, for example due to strong rolling movements of the ship, the float c ensures a relatively small fluctuation (rise) of the water level in the collecting vessel b by reducing the suction volume of the circulation compressor h by closing the throttle valve d to a greater or lesser extent. An impermissible rise of the water in the collecting vessel is not possible.

Claims (1)

Patentanspruch: Einrichtung zur Herabsetzung des Reibungswiderstandes von Schiffen, bei welchen eine Luftschicht unter dem Schiffsboden entlangläuft, die von einem Verdichter durch Auslaßöffnungen am Bug unter den Schiffsboden gedrückt wird und am Heck durch Lochbleche wieder in das Leitungssystem im Schiff eintritt, dadurch gekennzeichnet, daß zwischen den Eintrittsöffnungen(g) und dem Umlaufverdichter (h) ein bekanntes Sammelgefäß (b) angeordnet ist, in welchem ein Betriebswiderstand herrscht, der vom Boden des Schiffes gerechnet nur einen Bruchteil des Tiefgangs des Schiffes beträgt, und in der Verbindungsleitung (4 zwischen Sammelgefäß (b) und Umlaufverdichter (h) eine Drosselklappe (d) vorgesehen ist, die von einem auf dem Wasserspiegel des Sammelgefäßes (b) liegenden Schwimmer (c) betätigt wird.Claim: Device for reducing the frictional resistance of ships, in which a layer of air runs under the ship's bottom, which is pressed under the ship's bottom by a compressor through outlet openings on the bow and re-enters the pipe system in the ship at the stern through perforated sheets, characterized in that between A known collecting vessel (b) is arranged in the inlet openings (g) and the circulation compressor (h), in which there is an operating resistance which, calculated from the bottom of the ship, is only a fraction of the draft of the ship, and in the connecting line (4 between the collecting vessel ( b) and circulation compressor (h) a throttle valve (d) is provided, which is actuated by a float (c) lying on the water level of the collecting vessel (b).
DEB86041A 1966-03-02 1966-03-02 Device for reducing the frictional resistance of ships Pending DE1292029B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB86041A DE1292029B (en) 1966-03-02 1966-03-02 Device for reducing the frictional resistance of ships

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB86041A DE1292029B (en) 1966-03-02 1966-03-02 Device for reducing the frictional resistance of ships

Publications (1)

Publication Number Publication Date
DE1292029B true DE1292029B (en) 1969-04-03

Family

ID=6983197

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB86041A Pending DE1292029B (en) 1966-03-02 1966-03-02 Device for reducing the frictional resistance of ships

Country Status (1)

Country Link
DE (1) DE1292029B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10307795B4 (en) * 2003-02-24 2005-10-06 New-Logistics Gmbh Displacement body, in particular watercraft or ship, and method for reducing friction in displacement bodies

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT24010B (en) * 1904-10-20 1906-04-25 Gustave Quanonne Procedure for avoiding disruptions in ships whose locomotion is facilitated by blowing air into the water which may arise in the operation of locomotion, steering and other devices through contact with air.
FR395326A (en) * 1907-12-23 1909-02-20 Philippe Bunau Varilla Improvement in ship construction to reduce water resistance to progression
GB810769A (en) * 1956-12-27 1959-03-25 Knud Fini Gram Improvements in or relating to ships having the means for forming air cushions beneath the bottoms thereof
US3016865A (en) * 1959-05-21 1962-01-16 Thompson Ramo Wooldridge Inc Method and apparatus for reducing drag on submerged vehicles

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT24010B (en) * 1904-10-20 1906-04-25 Gustave Quanonne Procedure for avoiding disruptions in ships whose locomotion is facilitated by blowing air into the water which may arise in the operation of locomotion, steering and other devices through contact with air.
FR395326A (en) * 1907-12-23 1909-02-20 Philippe Bunau Varilla Improvement in ship construction to reduce water resistance to progression
GB810769A (en) * 1956-12-27 1959-03-25 Knud Fini Gram Improvements in or relating to ships having the means for forming air cushions beneath the bottoms thereof
US3016865A (en) * 1959-05-21 1962-01-16 Thompson Ramo Wooldridge Inc Method and apparatus for reducing drag on submerged vehicles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10307795B4 (en) * 2003-02-24 2005-10-06 New-Logistics Gmbh Displacement body, in particular watercraft or ship, and method for reducing friction in displacement bodies

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