Propulsion unit of contra-rotating propellers of electric ship

Abstract

The invention relates to a propulsion unit of contra-rotating propellers of an electric ship, which is a world most advanced ship power propulsion unit which takes an electromotor (direct current or alternating current) as a main engine to directly drive a gear case the transmission ratio of which is 3:1-40:1, can realize carbon-free zero emission (or reduce carbon emission), complies with the state energy and environmental protection policy and is suitable for various types and power, wherein the gear case is jointly combined with high-efficiency energy-saving contra-rotating propellers. Since the electromotor per se has the aheading function, the backing-up function and the frequency-change speed regulation function, the gear case only has the speed reducing function and the power distributary function, and even the electromotor directly drives two pairs of rotating propellers only by a power distributary mechanism without speed reduction. Moreover, all pieces in the case are symmetrically arranged, and the electromotor transfers the power to the two pairs of rotating propellers by means of a straight line via the gear case, and therefore, the propulsion unit has simpler and more compact structure, stable operation and low noise, automatic-regulation adaptation capability and overload protection capability. The energy saving value of the whole propulsion unit of the contra-rotating propellers can reach 12-15 percent, and the navigational speed and the propulsion efficiency are increased by 10-12 percent. The invention is the most ideal environmental-protection scheme for the propulsion upgrading and updating of modern ships.

Description

technical field [0001] The present invention relates to a motorized ship power device, which uses a motor (DC or AC) as the main engine to directly drive a gear box with a transmission ratio of 3:1 to 40:1 on the basis of applying for the invention patent "ship contra-rotating propulsion device" and then combines it with high-efficiency, The combination of energy-saving counter-rotating propellers can realize carbon-free and zero-emission (or reduce carbon emission), comply with national energy and environmental protection policies, and apply to the world's most advanced ship power propulsion device of various types and powers. [0002] The counter-rotating propeller technology of the present invention is an innovation and development combined with the current situation of Chinese ships. It uses a counter-rotating propeller to recover the rotational energy lost by a propeller. After years of installation of traditional propulsion devices and The contra-rotating propulsion devi...

AI Technical Summary

Problems solved by technology

[0007] The traditional propulsion device is connected by the engine in the nacelle to the gearbox with forward, reverse and speed change functions, and drives the single propeller through the intermediate shaft and the stern shaft, which has no energy-saving effect. In addition, the gearbox has large noise and vibration, and the transmission power loss of the gear is large. The bearing load is large, the structure is complex, the manufacturing cost is high, and it does not have the ability of automatic adaptation, etc.

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