A torsion spring string bionic fishtail rotor suitable for boats

Abstract

The invention relates to a torsion spring string bionic fish tail paddle suitable for a ship. The torsion spring string bionic fish tail paddle can realistically simulate the swimming mode of marine animals and fishes, transmission efficiency is improved, and noise is reduced; the number of torsion spring string degree-of-freedom nodes can be arbitrarily designed, the swimming mechanism of a mode of carangidae such as a tuna can be simulated, and the swimming mechanism of a mode of anguillidae such as an anguilla can further be simulated; and the torsion spring string structure is very simple and easy to machine and manufacture. The torsion spring string bionic fish tail paddle comprises a mounting plate, a torsion spring string, a tail body and a tail fin; one end of the torsion spring string is fixedly connected to one end of the mounting plate in the modes of welding or bolt connection or the like, and the other end of the torsion spring string is fixedly connected with the tail fin in the modes of welding or bolt connection or the like; and the torsion spring string covers the tail body. The tail body is made of a flexible material and can be bent, and the area of the tail body can affect the magnitude of thrust.

Description

Technical field [0001] The invention relates to a tail rotor, more specifically a torsion spring string bionic fish tail rotor suitable for boats. Background technique [0002] At present, surface and underwater vehicles basically adopt a propeller structure, and the curvature of the blade is fixed, which is the main reason for the low efficiency, which will produce larger noise and wake vortex. The swimming mode of fish and cetacean marine animals is the crystallization of biological evolutionary history, which has the advantages of high efficiency, high speed, high flexibility and low noise. If the surface vehicle and underwater submarine adopt the bionic fishtail underwater propulsion technology, they can achieve high-efficiency, flexible and low-noise effects. [0003] At present, there are many ways of propelling fish tails. For example, the flexible propulsion mechanism named as bionic robotic fish, application number 2004100536602, uses two motors to tighten and loosen the ...

AI Technical Summary

Problems solved by technology

The disadvantage of this structure is that there are only 2 swing nodes, and the rigid action is single and stiff

[0006] The name of the invention is electromagnetic drive multi-joint bionic fishtail propulsion device (Application No. 2007100726206). This patent uses longitudinal and transverse members, which are divided into multiple sections and connected by connecting shafts. The disadvantage of this structure is that it is more flexible and less rigid. It is difficult to be used in practical applications; there is also a dynamic multi-node structure, each degree of freedom node is equipped with a steering gear, generally more than 3 degrees of freedom nodes are installed, and 3 steering gears are installed, which will inevitably lead to the disadvantages of complex structure and increased difficulty in action coordination

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