Cross anti-pitch rudder

Abstract

The invention relates to a crossed anti-vertical rocking rudder, belonging to ship and ocean engineering technical field, composed of a vertical response rudder blade, a horizontal response rudder blade and intersection streamline rudder ball and installed at back of tail screw propeller of a ship and adjacent to the tail screw propeller. The invention effectively reduces vertical shaking motion of the ship body in waves, especially by a large margin reducing vertical shaking amplitude of the ship body approaching to resonance state, and completely improving wave resisting performance of a large-scale water surface ship. It can hang, semi-hang and support a rudder, applied to a single- paddle single-rudder ship, a double-paddle double-rudder ship and a multi-paddle multi-rudder ship. It can be used in designing a new ship and reconstructing and improving the wave resisting performance for the active water surface ships on condition of not changing the structures of the main ship bodies, thus having a completely wide spreading and applying prospect.

Description

technical field

[0001] The invention relates to a device in the technical field of ships, in particular to a cross-shaped anti-pitch rudder. Background technique

[0002] In order to reduce the swaying motion of the ship and improve the seakeeping performance of the ship, most ships have bilge keels arranged along the length of the underwater hull bilge, and some ships are equipped with anti-rolling tanks or fins. The bilge keel has a simple structure and low cost, but the anti-rolling effect is not ideal at low speeds, which increases the navigation resistance; the anti-rolling water tank not only needs to occupy the effective volume of the cabin, which increases the operating cost, but also has poor roll attenuation effect; the anti-rolling fin is An active anti-rolling device has a good anti-rolling effect when sailing at high speed, but basically cannot achieve the effect of anti-rolling when sailing at low speed or no speed, and the structure is complex and expensive, a...

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