Rubber for ships

Abstract

The invention relates to a rudder for ships with propeller drive, in which the propeller is arranged to rotate about a propulsion axis, with a rudder blade (15) and a flow body (20) arranged on the rudder blade (15), whereby the flow body designed in a bulb or zeppelin shape is arranged as an extension of the propulsion axis in the region of the rudder blade and is designed to self-destruct or self-detach in the event of an increase in the effect of force, blow, impact or pressure.

Description

TECHNICAL FIELD[0001]The invention relates to a rudder for ships in accordance with the preamble of Claim 1.PRIOR ART[0002]Rudders of ships with a propeller drive these days often have a so-called Costa bulb. The purpose of the so-called Costa bulb or propulsion bulb is that a bulge, which is designed bulb-shaped or zeppelin-shaped and constitutes a flow body, is configured as an extension of the propulsion axis in the region of the rudder blade. The purpose of this flow body is that the overall profile of the hub is extended to the point where there is only minimal turbulence of the wake.[0003]This type of Costa bulb is known for example from patents DE 198 44 353 A1, DE 84 23 818 U and DE 82 24 238 U.[0004]The effect of the Costa bulb rests on its bead-shaped configuration, by which it is distinguished from the rudder or respectively rudder blade, resulting in favourable flow.[0005]The Costa bulb however thus protrudes laterally relative to the rudder blade and in the event of the...

AI Technical Summary

Benefits of technology

[0007]The task of the invention is to provide a rudder blade for ships, which in spite of favourable flow relative to external effects due to the effect of an impact or a blow or pressure is less susceptible with respect to damage or destruction and the flow body is independently destroyed in the event of pressure or impact.

[0012]In an advantageous embodiment it is effective if the flow body comprises metal or a non-metallic material or a metal-non-metal mixture.

[0014]In a further advantageous embodiment it is effective if the material has embedded carbon fibres, graphite fibres and / or fibreglass.

[0019]The advantage of the inventive configuration of the flow body of a rudder blade of a rudder for ships is that due to the possibility of the flow body being destroyed the rudder is not impaired in the event of pressure, blow or impact effect. There is also the possibility that conventional rudder blades can be retrofitted with the inventive flow body.

Problems solved by technology

The Costa bulb however thus protrudes laterally relative to the rudder blade and in the event of the effect of an impact or a blow or pressure it is in the immediate danger zone, before the actual rudder blade would be jeopardised.

But in the event of the effect of an impact or a blow or pressure on the Costa bulb the rudder blade would also affected, because the Costa bulb transfers the force acting on it to the rudder blade and there is thus the added danger of damage to the rudder blade, before a rudder blade a without Costa bulb would be jeopardised.

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