Split type booster efficient rudder

Abstract

The invention relates to a split type booster efficient rudder, which divides a rudder blade into an upper part and a lower part by taking the propeller axis as a boundary, wherein the two parts are independent from each other and are in steering control respectively; the shapes and the sizes of the upper rudder blade and the lower blade can be different; the cross sections of the upper rudder blade and the lower blade can be asymmetrical wing sections with cambers; the balance position (maintaining direct route of a ship at the moment of out of steering or being called as amidship) of the upper rudder blade and the lower rudder blade is arranged by deflecting a certain degree toward the rotation direction in a staggered manner to form an X-shaped structure in a horizontal plane according to the rotation direction of a propeller; the upper rudder blade and the lower rudder blade are respectively provided with an upper rudder blade tiller and a lower rudder blade tiller; and the upper rudder blade tiller of the upper rudder blade is a hollow shaft, the lower rudder blade tiller of the lower rudder blade is a solid shaft, and the upper rudder blade tiller is sheathed on the lower rudder blade tiller to form a coaxial mode. When at the balance position, the biggest fluid power can be obtained, and manipulation can be completed by breaking the balance of side force. The invention has the advantages of improving steerability by making full use of the wake flow characteristics of the propeller and having the capability of self boosting, thus being suitable for manipulation of various ships.

Description

Technical field [0001] The invention relates to a ship device, in particular to a rudder device installed behind a ship propeller and used to control the motion of the ship. Background technique [0002] The maneuvering or maneuvering of a ship when navigating in water, such as collision avoidance and turning, basically rely on the rudder device, so the rudder is an important device to ensure the safety of the ship. The basic working principle of the rudder is to use the hydrodynamic force acting on the rudder to generate a deflection moment to force the ship to turn. The ideal rudder device should firstly have high rudder efficiency, that is, the lateral force generated under the same conditions should be as large as possible; second, it should have a positive effect on the propeller, that is, help to improve the propulsion efficiency of the propeller; third, the rudder itself should not form resistance and provide thrust. Generally speaking, the rudder is installed behin...

AI Technical Summary

Problems solved by technology

Its advantage is that the rudder can be steered by a single rudder stock, but the disadvantage is that it does not make full use of the flow conditions to maximize the hydrodynamic performance to boost and improve the rudder efficiency

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