Water jet propulsion ship with follow-up steering and stabilizing assisting system

Abstract

A water jet propulsion ship with a follow-up steering and stabilizing assisting system comprises a hull platform with a water jet propulsion device, tail fixing appendages, follow-up steering appendages, transmission rods and a synchronous connecting rod. The tail fixing appendages are fixed below the waterline of the tail of a hull, the forms of the broadside faces of the tail fixing appendages are the extension of the molded line of the broadside of the hull platform, and the forms of the ship bottom faces of the tail fixing appendages are the extension of the molded line of the ship bottomface of the hull platform so that the effect of lengthening the waterline plane of the hull can be achieved, wave-making resistance of the ship is reduced advantageously, and the navigation efficiencyis improved; and the follow-up steering appendages connected to the tail fixing appendages keeps synchronous rotation with a water jet in the hull platform, and a rectifying fin is arranged so that aflow field at the tail of the ship can be improved, viscous pressure resistance is reduced, the rudder effect for assisting steering is achieved when the ship makes a turn during navigation, and thewater jet propulsion ship has the characteristic that the steering efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of ships, in particular to a water-jet propulsion boat with a follow-up steering and stability auxiliary system, which can assist in improving the efficiency and stability of the water-jet propulsion boat when sailing and turning, and can also control water jet propulsion. The propulsion unit plays a protective role outside the hull. Background technique [0002] The current water jet propulsion boat has the characteristics of flexible control and high power output efficiency, and is an advanced propulsion system boat. Because the water jet propulsion device is usually installed on the stern plate of the hull, it does not need to be placed below the bottom of the hull, and it also has the advantage of being able to navigate in shallow waters. [0003] In current water-jet propulsion boats, the water-jet propulsion device is usually installed on the stern part of the boat, and the water jet and reversing def...

AI Technical Summary

Problems solved by technology

[0003] In the current water jet propulsion boats, the water jet propulsion device is usually installed on the stern part of the boat, and the water jet and reversing deflector are often damaged by collision with hard objects due to reversing or turning in an obstacle area

The commonly used solution is to install stainless steel protection devices around the part of the water jet propulsion device that protrudes from the hull or add protrusions such as a stern diving platform for protection. The disadvantage is that the overall beauty of the hull is sacrificed and the weight of the tail is increased.

[0004] The steering operation of the current water-jet propulsion boat is realized simply by changing the direction of the jet flow of the water jet. However, due to the relatively low degree of thrust vectorization of the water-jet propulsion, the steering thrust is particularly easy to lose when sailing and turning.

[0005] The thrust of the water jet propulsion boat is generated by the jet after the water jet propulsion device sucks in the water. The weight of the water sucked into the pipeline of the water jet propulsion device will increase the displacement of the stern of the hull (usually accounting for about 5% of the total ship displacement) The stern of the boat sinks, and the increase in the displacement of the stern also increases the wave-making resistance at the stern of the boat, reducing the sailing efficiency and stability of the boat

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