Stern transom plate-free ship line and balanced rudder blade

Abstract

The invention discloses a stern transom plate-free ship line and a balanced rudder blade. A ship bottom at the installation position of a ship body rubber blade is a combined ship body cyclogenesis surface; the combined ship body cyclogenesis surface is formed by combining a ship body cyclogenesis curved surface, a ship body cyclogenesis horizontal sector, a ship body cyclogenesis cylindrical surface, and a ship body cyclogenesis cylindrical surface lower end face; for a streamline rudder blade, the upper end face of the rudder blade is a curved surface which is parallel to the ship body cyclogenesis curved surface; and for a flat plate rudder blade, the upper end line of the rudder blade is a curved line which is parallel to the ship body cyclogenesis curved surface. According to the stern transom plate-free ship line, the upper edge shape of the rudder blade is always kept in parallel with a ship bottom plate shape while a gap between the upper edge of the rudder blade and a ship bottom plate can be minimized in all corner ranges of the rudder blade, and optimal spatial fitting is always kept, so that the steerage is increased effectively, the maneuverability of the ship is improved, and energy is saved.

Description

Technical field [0001] The invention relates to a hull and rudder blades, in particular to a hull without a stern sealing plate and a balanced rudder rudder blade, which is suitable for various types of single-rudder ships and multi-rudder ships without stern sealing plates with balanced rudder installed, and belongs to the technical field of ships . Background technique [0002] Ship maneuverability plays an important role in the overall performance of the ship and the quality of the navigation performance of the ship, and the rudder has a decisive role in the maneuverability of the ship, so how to improve the rudder efficiency has become one of the important issues for shipbuilders. It has long been realized in theory that under the condition that the rudder area and the rudder section remain unchanged, the aspect ratio plays a decisive role in the rudder effect. A large aspect ratio will result in high rudder efficiency, and a small aspect ratio will result in low rudder effic...

AI Technical Summary

Problems solved by technology

However, this favorable factor can only be better reflected when the hull where the rudder blades are installed is flat. The leaf is a mechanism that can rotate around the center of the rudder stock, so the existing technology can only make the upper edge of the rudder and the bottom plate of the hull have a good coincidence state (that is, the gap is the smallest) at a certain corner of the rudder blade, so that the The rudder blade has a better rudder effect at this turning angle

For example, for a single-stern and single-rudder ship, at a rudder angle of 0°, the shape of the upper edge of the rudder blade can be parallel to the shape of the stern bottom plate and the gap can be minimized, so that the rudder effect is the best at this time, but when the rudder turns At a certain angle, in order to prevent the rudder blade from colliding with the hull or due to the shape of the hull itself, the parallel and close relationship between the shape of the upper edge of the rudder blade and the shape of the bottom plate of the hull must be lost. At this time, the gap becomes a scissors difference. reducing the rudder efficiency

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