Fish-like flap rudder

Abstract

The invention aims to provide a fish-like wing-flap-type rudder device. The fish-like wing-flap-type rudder device comprises a fish-like primary rudder and a fishtail-type secondary rudder. A rudder front body of the fish-like primary rudder is in a streamline symmetrical wing shape. A rudder middle body of the fish-like primary rudder is a flat-plate waist section. A rudder back body of the fish-type primary rudder is in a fan shape, the rudder back body of the fish-type primary rudder is hinged to the fishtail-type secondary rudder, and the fishtail-type secondary rudder rotates relatively along with the rotation of the fish-like primary rudder. The fish-like wing-flap-type helm device has good rudder effects under the condition of small rudder angles, can guarantee the heading stability of ships, and is suitable for inland river transport ships, port operation ships and ocean engineering vessels with specific requirements for ship maneuverability, and further applicable to original sample conveying transport ships with high requirements for head stability.

Description

technical field [0001] The invention relates to a ship rudder device. Background technique [0002] At present, most of the rudder devices used to control the course are integral structures, and the surface thereof is a streamlined section. Since this rudder is an integral structure, the turning radius of the ship installed with this rudder is relatively large. With the further development of the inland shipping industry and the implementation of the 12th Five-Year Ocean Power Strategy, there are more and more inland and ocean-going transport ships, port operation ships and ocean engineering ships. In the past, the traditional streamlined integral rudder is difficult to meet these ships with high maneuverability requirements. . In addition, with the soaring international oil prices and energy shortages, the EEDI calculation formula was released at the 58th meeting of the MEPC, and at the 62nd meeting of the MEPC in July 2011, the Amendment to Annex VI of the "MARPOL73 / 78 C...

AI Technical Summary

Problems solved by technology

The two guidelines have come into effect on January 1, 2013, and will be enforced in 2015. Newly designed ships with EEDI index exceeding the standard will not be able to pass the audit of classification societies or IMO, and operating ships with EEDI index exceeding the standard may be forced to be scrapped or unable to enter International shipping market

The course stability of the ship in operation plays an important role in the energy consumption of the ship in operation. The control of the rudder device needs to consume the ship’s energy. The pressure center of the traditional streamlined integral rudder changes greatly with the change of the rudder angle. The torque of the rudder shaft The change is also large, the required steering gear power is increased, the operating cost is higher, and the energy consumption of the ship is higher

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