DEV0004858MA - - Google Patents

Description

Sponsors τ ansp ρ, ü c η ε _:

ι. Ship shape with on the ship's bottom in the area of the propulsion organ, z. B. a propeller, an impeller propeller or the like, arranged, downwardly protruding protective attachment, to keep floating bodies away from the propulsion system, characterized in that, that the protective attachment (2) both front and rear as well as to the side of perpendicular or approximately perpendicular side walls is limited, which converge in a wedge shape at the front and rear.

2. Ship shape according to claim 1, characterized in that that the wedge-shaped converging side walls of the protective attachment (2) merge at the front into the beam keel (4).

3. Ship shape according to claim 1 or 2, characterized in that the protective attachment (2) has a smooth bottom (5) on which the propulsion element (6) is arranged (Fig. 1 to 3).

4. Ship shape according to claim 1 or 2, characterized in that the bottom (5) of the Protective attachment (2) has the shape of a tunnel (7) into which the propulsion device (8) is partially or protrudes completely (Fig. 4 to 6).

1 sheet of drawings

© 509 659/451 2.56

Claims (1)

V4858XIl65a ⁱ To the propulsion organ of ships (ship propeller, impeller propeller or the like.) Before. contact Protecting with floating bodies, especially ice, is already known on the ship's bottom to arrange a downwardly protruding protective structure in the area of 'the jacking organ'. The to The protective ship propeller then sits on the mostly flat floor of this protective structure. The approximately vertical side walls of the extension converge in a wedge shape towards the rear, so that these wedge surfaces the one from behind - i.e. when reversing - Reject floating bodies and guide them to the side of the propeller. Since the protective cultivation according to the front gradually merges into the ship's bottom, there is a risk when driving forward that under the Ship bottom ice or the like that swims into the propeller jet. It was already proposed to arrange the wedge surfaces of the protective attachment in the forward direction. Step here but the aforementioned shortcomings are more pronounced when reversing. It is now proposed that the arranged on the ship's floor in the area of the propulsion member and down .ragende Sdhutzanbau according to the invention both forwards and backwards as well is bounded laterally by perpendicular or approximately perpendicular side walls, the front and rear converge in a wedge shape. This double wedge shape means that floating bodies are both at Forward and backward travel with certainty laterally rejected and on the ship's propeller safely passed. When using the protective attachment according to the invention for bow propellers, one also achieves this at the same time an improvement in the propulsion effect compared to the previously known protective structures, which for a repellent effect are provided for only a single direction of travel. It has been shown that that at the lower edges of the proposed in each case in the rear in the direction of travel Schutzanbaües a detachment of the propeller jet from the hull occurs and that thereby insert a vortex zone as a protective layer between the ship's bottom and the propeller jet; the the resulting reduction in the frictional suction then causes the aforementioned improvement in the Propulsion effect. This improvement can be so significant that the one brought about by the protective cultivation Increase in the ship's resistance partially or under certain circumstances completely compensated for will. The latter is particularly the case when the protective attachment, such as in the drawing shown, is kept slim and has a large ratio of its length to its width and has only a low intrinsic resistance. On ships with several propulsion organs, it goes without saying that in the area of each propulsion organ such a protective structure may be provided. But it is also possible for several adjacent propulsion organs to arrange a common protective structure. If the keel on the ship's floor extends to the protective structure, it is advantageous to use the wedge-shaped converging side walls of the protective structure merge into the beam keel. The protective cultivation can have a smooth bottom, on which the Yortnebsorgan - in in this case in particular an impeller propeller - is arranged. In the case of screw ships, however, it is It is expedient to design the floor of the protective structure as a tunnel into which the propulsion system is partially or protrudes completely. In FIGS. 1 to 6 of the drawing, the invention is explained in more detail using two exemplary embodiments. Fig. Ι to 3 show a side view or from behind and from below with the stern of a ship Impeller propeller drive and a protective attachment according to the invention. On the ship's bottom 1 is the downwardly protruding protective attachment 2 is arranged. Its side walls are approximately perpendicular. They converge towards the rear (at 3) and towards the front in a wedge shape and in this way form deflection surfaces for bodies floating in the direction of the ship's propeller. That goes forward Protective cultivation gradually over into beam keel 4. On the flat bottom 5 of the protective structure is a Impeller propeller 6 attached as a propulsion element. . Fig. 4 to 6 show, again in view and from behind and below, a ship stern with a protective attachment very similar to the first embodiment example. Here, the floor 5 of the protective extension 2 is not smooth, but in the form of a tunnel 7, into which the propeller 8 partially protrudes.