Side-pushable towboat having two right-angle drive propulsion system equipped on bow and stern

Abstract

The pored hinge-type flapping wing for ornithopter includes frame with air ports and movable leaves on the air ports. When the flapping wing raises, the opened air ports make airflow to pass to reduce resistance on the flapping wing; and when the flapping wing swings downwards, the leaves closed air ports increase resistance on the flapping wing and the counterforce makes the fuselage raise. The present invention can rotate the wings in certain angle and / or alter the wing swing direction to make the ornithopter obtain forward or backward driving force while producing lift force, and can turn via regulating the frequency and amplitude of the two swinging wings.

Description

technical field [0001] The invention relates to a side-thrusting tugboat, in particular to a side-throwing tugboat equipped with right-angle drive propulsion devices at the bow and stern, and belongs to the technical field of ship engineering. Background technique [0002] Currently known various tugboats, including ocean-going tugboats, coastal tugboats, inland river tugboats and port tugboats, only have two kinds of operation modes of towing and pushing. When other ships require to leave the shore, because the gap between the bow and the shoreline is narrow, the length of the tugboat cannot be accommodated, so the tugboat cannot carry out the pushing operation. The only way of operation is to transfer to the outside of the ship and pull the bow of the ship with a steel cable. When the object to be towed is too tall, or the water surface of the towing operation is narrow, the operation of receiving the throwing steel cable is very complicated, and the towing operation is d...

AI Technical Summary

Problems solved by technology

In the prior art, the patent No. 96198742.1 of the "tugboat with horizontal propulsion device" patent is equipped with two propulsion devices at the stern of the tugboat and one propulsion device at the bow, but the propulsion device at the bow does not propel laterally function, the tugboat only has the advantages of flexible operation and fuel saving, and does not have the ability to push sideways

The patent application number is 03151297.6 for the patent of "side-throwable tugboat with elevating lateral propulsion device at the bow". The bow part enables the tugboat to have the ability to push sideways, and can work on a towed ship of general tonnage. During the sideway operation, the two general-purpose propulsion devices at the stern do not participate in the work at all, resulting in limited sideway thrust power, which is not suitable for the ship to be towed. Overweight side thrusting tasks

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