DE931270C - Protection device for laterally lying propellers - Google Patents
Protection device for laterally lying propellersInfo
- Publication number
- DE931270C DE931270C DEW14139A DEW0014139A DE931270C DE 931270 C DE931270 C DE 931270C DE W14139 A DEW14139 A DE W14139A DE W0014139 A DEW0014139 A DE W0014139A DE 931270 C DE931270 C DE 931270C
- Authority
- DE
- Germany
- Prior art keywords
- propellers
- protection device
- laterally lying
- protective device
- lying
- 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
Links
Classifications
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Prevention Of Electric Corrosion (AREA)
Description
Die Erfindung betrifft eine Schutzvorrichtung für seitlich liegende Schiffsschrauben gegen Grundberührung. Es ist bereits bekannt, die seitlich liegenden Schiffsschrauben mit einer vollständigen Ummantelung (Düse) zu versehen. Diese vollständigen Ummantelungen der Schiffsschrauben haben jedoch die Nachteile eines zu großen Wasserwiderstandes bei stillstehenden seitlichen Schiffsschrauben und einer zu großen Sogwirkung bei flachem Fahrwasser; weiterhin können sie bei eng zusammenliegenden Schiffsschrauben wegen zu großen Platzbedarfs nicht untergebracht werden.The invention relates to a protective device for lying on the side Ship propellers against grounding. It is already known the laterally lying To provide ship propellers with a complete coating (nozzle). This complete However, jackets for the propellers have the disadvantages of too great a water resistance when the lateral propellers are stationary and the suction effect is too great shallow fairway; they can continue to be used when the propellers are close together cannot be accommodated because of too large a space requirement.
Diese Übelstände werden durch die Erfindung beseitigt; sie besteht darin, daß die Schutzvorrichtung als ein nur den äußeren Teil des Schraubenkreises schalenartig umhüllendes Segment ausgebildet ist. Nunmehr können die vorstehend geschilderten Übelstände nicht mehr auftreten, während gleichzeitig eine Steigerung der Schubleistung der Schiffsschraube bei größeren Schraubenbelastungen erzielt wird.These drawbacks are eliminated by the invention; she consists in that the protective device as a only the outer part of the screw circle Shell-like enveloping segment is formed. Now the above The evils described no longer occur, while at the same time an increase the thrust of the propeller achieved with larger screw loads will.
In der Zeichnung ist ein Ausführungsbeispiel .der Erfindung dargestellt. Es zeigt in schematischer Darstellung Fig. i ein nach der Erfindung ausgerüstetes Schiff in Seitenansicht, Fig. 2 in Rückansicht, Fig. 3 in Draufsicht mit geschnittenen Schutzsegmenten. Nach der Erfindung besteht die Schutzvorrichtung für die beiden seitlichen Schiffsschrauben b aus einem Segment a, das die seitlichen Schiffsschrauben nur auf der Außenseite schalenförmig umfaßt (s. Fig. 2). Diese Abweiser in Segmentform a besitzen erfindungsgemäß zur Verbesserung der Schubleistung der Schiffsschraube im Querschnitt eine Tragflügelprofilform c (Fig.3). Die Innenseite des Profils hat dabei vorn einen größeren Abstand von Mitte Schraubenwelle d als an der Hinterkante. Durch das fehlende Gegenstück vermindert sich der Widerstand der neuen Schutzvorrichtung bei stehenden seitlichen Propellern erheblich gegenüber den ganz ummantelten Schiffsschrauben.The drawing shows an exemplary embodiment of the invention. It shows in a schematic representation Fig. I an equipped according to the invention Ship in side view, Fig. 2 in rear view, Fig. 3 in plan view with sections Protection segments. According to the invention, there is a protective device for the two lateral propellers b from a segment a, which is the lateral propellers encompassed cup-shaped only on the outside (see Fig. 2). These deflectors in segment form a possess according to the invention to improve the thrust performance of the propeller in cross section an airfoil profile shape c (Fig. 3). The inside of the profile has at the front a greater distance from the center of the propeller shaft d than at the rear edge. The lack of a counterpart reduces the resistance of the new protective device with standing side propellers considerably compared to the completely sheathed propellers.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEW14139A DE931270C (en) | 1954-06-05 | 1954-06-05 | Protection device for laterally lying propellers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEW14139A DE931270C (en) | 1954-06-05 | 1954-06-05 | Protection device for laterally lying propellers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE931270C true DE931270C (en) | 1955-08-04 |
Family
ID=7595216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEW14139A Expired DE931270C (en) | 1954-06-05 | 1954-06-05 | Protection device for laterally lying propellers |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE931270C (en) |
-
1954
- 1954-06-05 DE DEW14139A patent/DE931270C/en not_active Expired
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