Ship propulsion appliance

Abstract

The invention discloses a ship propulsion appliance which comprises a propulsion mechanism, a telescoping mechanism, a rotation mechanism and an underwater gear box. A propeller can rotate to propel aship by the aid of the propulsion mechanism, can be driven by the telescoping mechanism to telescope in the up-down directions and can be driven by the rotation mechanism to rotate by full circles, cylinders are connected with a telescoping barrel shaft, a rotation barrel shaft is nested in the telescoping barrel shaft and is connected with the upper end of the underwater gear box, one end of a worm gear and worm pair is connected with a rotation motor, the other end of the worm gear and worm pair is connected with the rotation barrel shaft, the rotation barrel shaft is connected with the upper end of the underwater gear box, a propulsion motor is connected with a spline shaft by a linkage appliance, the other end of the spline shaft is connected with a hollow rotary shaft, the hollow rotary shaft is connected with the upper end of the underwater gear box, and the propeller is mounted on a side of the underwater gear box. The ship propulsion appliance has the advantages that the propeller can have transmission and up-down telescoping functions, so that the ship propulsion appliance can adapt to navigation zones with great change in draft; the propeller of the ship propulsion appliance can be driven by the cylinders to rotate by the full circles at 360-degree angles, and accordingly the ship propulsion appliance is high in steering efficiency, simple in structure and easy and convenient to operate.

Description

technical field [0001] The invention relates to a propeller, in particular to a ship propeller. Background technique [0002] The driving device of the existing ship mainly includes two parts, the propeller and the rudder plate. When the propeller rotates forward, the ship is pushed forward, and the rudder plate is used to control the driving direction of the ship. Existing marine propellers cannot be stretched up and down, cannot effectively adapt to complex terrain, and cannot be applied to navigation areas with large draft changes. When the draft of the hull is relatively deep and the propeller sinks into the water, the thrust obtained by the propeller will be reduced and the main engine will be "lightly loaded" because the flow velocity on the water surface is greater than that under the water. Some propellers use oil cylinders to drive the propellers up and down to adapt to draft changes, but the installation and maintenance costs of oil cylinders are high, and the hyd...

AI Technical Summary

Problems solved by technology

Some propellers use oil cylinders to drive up and down the propellers to adapt to changes in draft, but the installation and maintenance costs of oil cylinders are high, and the hydraulic oil also has the problem of polluting river water, which does not meet the requirements of today's society for environmental protection.

[0003] When the ship needs to go back, the propeller must first stop rotating, and then reversed to make the ship go back. This step takes a long time. During this period of time, the ship will continue to move forward for a certain distance due to inertia. In emergency situations such as dangerous objects, ships are prone to accidents such as collisions

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