EP0911256B1 - Guard for a cycloidal propeller - Google Patents
Guard for a cycloidal propeller Download PDFInfo
- Publication number
- EP0911256B1 EP0911256B1 EP98117629A EP98117629A EP0911256B1 EP 0911256 B1 EP0911256 B1 EP 0911256B1 EP 98117629 A EP98117629 A EP 98117629A EP 98117629 A EP98117629 A EP 98117629A EP 0911256 B1 EP0911256 B1 EP 0911256B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- profiling
- guard plate
- region
- travel
- cycloidal propeller
- 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
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Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
- B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
- B63H5/16—Arrangements on vessels of propulsion elements directly acting on water of propellers characterised by being mounted in recesses; with stationary water-guiding elements; Means to prevent fouling of the propeller, e.g. guards, cages or screens
- B63H5/165—Propeller guards, line cutters or other means for protecting propellers or rudders
Definitions
- the invention relates to a cycloidal propeller with a rotor, the Propeller blades of the rotor are cyclically pivoted, which Rotor axis of rotation and the wing swivel axes in operation parallel to each other and run vertically and at the free end of the propeller blades Protection plate is provided, which is strongly profiled in the direction of travel at the front.
- a water stretcher is required today that in both directions - So for driving ahead and driving back - the same cable train was reached becomes.
- the highest are on their profile Thrust generated in the area of the control point.
- the propellers are arranged side by side, the control points are located of the propeller on the outside with the thrust direction ahead. In the backward direction however, they are inside.
- the profiling of the protective plate as it emerges from the State of the art above can meet these requirements do not match.
- the invention has for its object the protective plate in terms of strong suction forces and one corresponding to the required Cable trains for forward and backward travel in accordance with good quality to design.
- the protective plate profile is designed so that in advance a strong profile in the front, in the direction of thrust in front of the propeller in the area of the control point for advance and in the backward direction behind the Propeller in the area of the control point for reverse travel.
- Fig. 1 12 is the bow of a ship, for example a water stretcher, and 13 is the ship's floor, to which the protective plate 2 is fastened by means of struts 9.
- the protective plate 2 is shown again in FIG. 2, the wing circle 8 or 8 ′ of the propeller wing being drawn in here, which belongs to each of the two propellers arranged next to one another here, based on the direction of travel.
- the extreme positions of the control points for forward travel S and reverse travel S 'and the associated eccentricities e v (for forward travel) and e r (for reverse travel) are also given.
- the flow profiles for forward and backward travel are also indicated by the arrows.
- Fig. 3 From Fig. 3 can be seen by the individual sections a and c specified forms of the protective plate whose profiling. You can see that Parabolic profiling mainly in the area between the corresponding edge and the wing circle. In the middle between the Section planes through the extreme positions of the control point (section b) are recognized one the transition area of the protective plate, in which no profiling is available.
- the protective plate tapers towards the opposite edge.
- the Edges of the protective plate where there is no profiling, are also at least slightly rounded.
- the degree of tapering of the protective plate is approximately between 40 and 60% of the maximum thickness thereof, the maximum thickness of the protective plate about 15% of the diameter of the Wing circle can be. It should also be noted that the profiling of course does not have to run exactly according to a parabola.
- This design of the protective plate is a good adaptation of the Plate with regard to the degree of quality to the flow conditions with forward or Reverse drive achieved
- the quality grade improvement is about 10% compared to a normal plate.
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- 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)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Soil Working Implements (AREA)
- Harvester Elements (AREA)
- Wind Motors (AREA)
Description
Die Erfindung betrifft einen Zykloidalpropeller mit einem Rotor, wobei die Propellerflügel des Rotors zyklisch schwenkbar gelagert sind, die Rotordrehachse und die Flügelschwenkachsen im Betrieb parallel zueinander und senkrecht verlaufen und am freien Ende der Propellerflügel eine Schutzplatte vorgesehen ist, die in Fahrtrichtung vorne stark profiliert ist.The invention relates to a cycloidal propeller with a rotor, the Propeller blades of the rotor are cyclically pivoted, which Rotor axis of rotation and the wing swivel axes in operation parallel to each other and run vertically and at the free end of the propeller blades Protection plate is provided, which is strongly profiled in the direction of travel at the front.
Eine Beschreibung eines solchen Propellers findet sich in Sonderdruck aus HANSA Nr. 16/1965, S. 1543 - 1548 sowie der Druckschrift der Firma Voith: Voith-Schneider-Propeller, 2500 B65, S, 15. In diesen Druckschriften ist jeweil ein Zykloidalpropeller dargestellt, der für Wassertrecker benutzt wird und mit einer in Fahrtrichtung vorne profilierten Schutzplatte für die Propellerflügel aufweist.A description of such a propeller can be found in a special edition HANSA No. 16/1965, pp. 1543 - 1548 as well as the Voith publication: Voith-Schneider-Propeller, 2500 B65, S, 15. In each of these documents a cycloidal propeller shown that is used for water tractors and with a protective plate profiled in the direction of travel for the propeller blades having.
Von einem Wassertrecker wird heute gefordert, daß in beiden Fahrtrichtungen - also für Fahrt voraus und Fahrt zurück - ein gleicher Trossenzug erreicht wird. Während des Umlaufs der Flügel werden an deren Profil die höchsten Schubkräfte im Bereich des Steuerpunktes erzeugt. Demgemäß entwickeln sich auch die höchsten Sogkräfte und Austrittsgeschwindigkeiten in diesem Bereich. Bei Nebeneinanderanordnung der Propeller liegen die Steuerpunkte des Propellers jeweils bei Schubrichtung voraus außen. In Rückwärtsrichtung liegen sie dagegen innen. Die Profilerung der Schutzplatte, wie sie aus dem oben genannten Stand der Technik hervorgeht, kann diesen Anforderungen nicht entsprechen.A water stretcher is required today that in both directions - So for driving ahead and driving back - the same cable train was reached becomes. During the rotation of the wings, the highest are on their profile Thrust generated in the area of the control point. Develop accordingly also the highest suction forces and exit speeds in this Area. If the propellers are arranged side by side, the control points are located of the propeller on the outside with the thrust direction ahead. In the backward direction however, they are inside. The profiling of the protective plate as it emerges from the State of the art above can meet these requirements do not match.
Der Erfindung liegt die Aufgabe zugrunde, die Schutzplatte hinsichtlich der auftretenden starken Sogkräfte und eines entsprechend den geforderten Trossenzügen für Vorwärts- und Rückwärtsfahrt entsprechend guten Gütegrad zu gestalten. The invention has for its object the protective plate in terms of strong suction forces and one corresponding to the required Cable trains for forward and backward travel in accordance with good quality to design.
Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruchs 1 gelöstThis object is achieved by the characterizing features of claim 1 solved
Demgemäß wird das Schutzplattenprofil so gestaltet, daß in Vorausrichtung eine starke Profilierung vorne, in Schubrichtung vor dem Propeller im Bereich des Steuerpunktes für Voraus liegt und in Rückwärtsrichtung hinter dem Propeller im Bereich des Steuerpunktes für Rückwärtsfahrt.Accordingly, the protective plate profile is designed so that in advance a strong profile in the front, in the direction of thrust in front of the propeller in the area of the control point for advance and in the backward direction behind the Propeller in the area of the control point for reverse travel.
Nachfolgend wird die Erfindung anhand den Figuren der Zeichnung erläutert.The invention is explained below with reference to the figures of the drawing.
Dabei stellen im einzelnen dar:
In Fig. 1 ist 12 der Bug eines Schiffes, z.B. eines Wassertreckers, und 13 der
Schiffsboden, an welchem mittels Streben 9 die Schutzplatte 2 befestigt ist
Sie schirmt damit die einzelnen Propellerflügel 1,1' gegen z.B.
Bodenberührung oder Berührung durch andere Fremdkörper ab. Die
Schutzplatte 2 ist in Fig. 2 noch einmal dargestellt, wobei hier der Flügelkreis
8 bzw. 8' der Propellerflügel eingezeichnet ist, der zu jedem der hier
nebeneinander - bezogen auf die Fahrtrichtung - angeordneten beiden
Propeller gehört. Die Extremlagen der Steuerpunkte für Vorausfahrt S und
Rückwärtsfahrt S' und die zugehörigen Exzentrizitäten ev (für Vorwärtsfahrt)
und er (für Rückwärtsfahrt) sind auch angegeben. Ferner sind auch die
Strömungsprofile für Voraus- und Rückwärtsfahrt durch die Pfeile angedeutet. In Fig. 1, 12 is the bow of a ship, for example a water stretcher, and 13 is the ship's floor, to which the
Aus Fig. 3 erkennt man durch die zu den einzelnen Schnitten a und c angegebenen Formen der Schutzplatte deren Profilierung. Man erkennt die parabelförmige Profilierung jeweils hauptsächlich im Bereich zwischen der entsprechenden Kante und dem Flügelkreis. Im Mittelbereich zwischen den Schnittebenen durch die Extremlagen des Steuerpunktes (Schnitt b) erkennt man den Übergangsbereich der Schutzplatte, in welchem keine Profilierung vorhanden ist.From Fig. 3 can be seen by the individual sections a and c specified forms of the protective plate whose profiling. You can see that Parabolic profiling mainly in the area between the corresponding edge and the wing circle. In the middle between the Section planes through the extreme positions of the control point (section b) are recognized one the transition area of the protective plate, in which no profiling is available.
Man erkennt ferner, daß im an sich profilierten Bereich der Schutzplatte jeweils hin zur gegenüberliegenden Kante sich die Schutzplatte verjüngt. Die Kanten der Schutzplatte, wo keine Profilierung vorhanden ist, sind auch zumindest leicht abgerundet. Der Verjüngungsgrad der Schutzplatte beträgt etwa zwischen 40 und 60 % der maximalen Dicke derselben, wobei die maximale Dicke der Schutzplatte etwa 15% des Durchmessers des Flügelkreises betragen kann. Es ist noch anzumerken, daß die Profilierung natürlich nicht genau nach einer Parabel verlaufen muß.It can also be seen that in the profiled area of the protective plate the protective plate tapers towards the opposite edge. The Edges of the protective plate, where there is no profiling, are also at least slightly rounded. The degree of tapering of the protective plate is approximately between 40 and 60% of the maximum thickness thereof, the maximum thickness of the protective plate about 15% of the diameter of the Wing circle can be. It should also be noted that the profiling of course does not have to run exactly according to a parabola.
Es ist natürlich klar und muß nicht extra erwähnt werden, daß die Profilierung in dem Bereich der Platte erfolgt bzw. auf der Seite derselben, die den Flügeln zugewandt ist. In Fig. 3 sind diese Abrundungsbereiche in Parabelform mit 5 - für Vorwärtsfahrt - bzw. 6 - für Rückwärtsfahrt - bezeichnet. Der mittlere Bereich bzw. Übergangsbereich mit wenig Profilierung entspricht dem Schnitt b.It is, of course, clear and need not be mentioned that profiling in the area of the plate or on the side of the plate that the Wings is facing. 3, these rounding areas are in Parabolic shape with 5 - for forward travel - or 6 - for reverse travel - designated. The middle area or transition area with little Profiling corresponds to section b.
Durch diese Ausführungsart der Schutzplatte wird eine gute Anpassung der Platte hinsichtlich Gütegrad an die Strömungsbedingungen bei Vorwärts- bzw. Rückwärtsfahrt erzielt Die Verbesserung des Gütegrades beträgt etwa 10 % gegenüber einer normal ausgeführten Platte.This design of the protective plate is a good adaptation of the Plate with regard to the degree of quality to the flow conditions with forward or Reverse drive achieved The quality grade improvement is about 10% compared to a normal plate.
Claims (6)
- Cycloidal propeller comprising a rotor; the propeller blades of the rotor are mounted so as to be cyclically pivotal; the axis of rotation of the rotor and the pivot axes of the blades extend parallel to one another and perpendicularly during operation; a guard plate (2) is provided at the free end of the propeller blade (1); the guard plate (2) has pronounced profiling at the front - in sections perpendicular to the axis between the extreme positions of the control point (S, S') - in the region about the cutting plane through the extreme position (ev) of the control point for forwards travel in the direction of travel; the guard plate (2) has pronounced profiling at the front of approximately equal size in the region about the cutting plane through the extreme position (er) of the control point for reverse travel in the reverse direction of travel.
- Cycloidal propeller according to claim 1, characterised in that the guard plate (2) is only slightly profiled in the centre between the planes through the end positions of the control points.
- Cycloidal propeller according to claim 1 or 2, characterised in that, in the region between the planes through the extreme positions of the control point, the profiling of the corresponding edge of the guard plate (2) is carried out approximately up to the blade circle (8) at most in each case and in the further region of the guard plate, i.e. toward its lateral edges, based on the longitudinal axis of the ship, at most approximately only the maximum profiling accordingly resulting in the other region is provided.
- Cycloidal propeller according to any of claims 1 to 3, characterised in that the profiling extends parabolically.
- Cycloidal propeller according to any of claims 1 to 4, characterised in that in the region where there is no profiling, the guard plate tapers in its cross-section in the direction of its edge from which the profiling takes its starting point, up to its opposing edge.
- Cycloidal propeller according to claim 5, characterised in that the degree of tapering is between 40° and 60°.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19746977A DE19746977C1 (en) | 1997-10-24 | 1997-10-24 | Cycloidal propeller for hydrofoil |
| DE19746977 | 1997-10-24 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0911256A2 EP0911256A2 (en) | 1999-04-28 |
| EP0911256A3 EP0911256A3 (en) | 2001-08-01 |
| EP0911256B1 true EP0911256B1 (en) | 2003-05-02 |
Family
ID=7846475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98117629A Expired - Lifetime EP0911256B1 (en) | 1997-10-24 | 1998-09-17 | Guard for a cycloidal propeller |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0911256B1 (en) |
| DE (2) | DE19746977C1 (en) |
| ES (1) | ES2197404T3 (en) |
| NO (1) | NO312623B1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004020522B4 (en) * | 2004-04-26 | 2006-04-27 | Voith Turbo Marine Gmbh & Co. Kg | cycloidal |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB707670A (en) * | 1950-12-13 | 1954-04-21 | Voith Gmbh J M | Improvements in water craft with drive by vane wheel propeller |
| NO129784B (en) * | 1972-07-12 | 1974-05-27 | Liaaen As A M |
-
1997
- 1997-10-24 DE DE19746977A patent/DE19746977C1/en not_active Expired - Fee Related
-
1998
- 1998-09-17 DE DE59808145T patent/DE59808145D1/en not_active Expired - Lifetime
- 1998-09-17 ES ES98117629T patent/ES2197404T3/en not_active Expired - Lifetime
- 1998-09-17 EP EP98117629A patent/EP0911256B1/en not_active Expired - Lifetime
- 1998-10-16 NO NO19984847A patent/NO312623B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE19746977C1 (en) | 1999-02-25 |
| NO312623B1 (en) | 2002-06-10 |
| EP0911256A2 (en) | 1999-04-28 |
| EP0911256A3 (en) | 2001-08-01 |
| DE59808145D1 (en) | 2003-06-05 |
| ES2197404T3 (en) | 2004-01-01 |
| NO984847L (en) | 1999-04-26 |
| NO984847D0 (en) | 1998-10-16 |
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