Electric full-circle rotation inboard and outboard (double-motor) contra-rotating propeller propulsion unit

Abstract

An electric full-circle rotation inboard and outboard (double-motor) contra-rotating propeller propulsion unit is applicable to various small and medium-sized ships and boats, an energy conservation value is increased by 10% to 12%, and navigational speed and propulsion efficiency are improved by about 10%. The electric full-circle rotation inboard and outboard (double-motor) contra-rotating propeller propulsion unit comprises encoders, servo motors, speed reducers and large and small cylindrical gears, a rotary support and a sleeve are connected with a lower box to realize full-circle rotation, a ship can turn around flexibly, the reversing speed of the ship is increased by 1.6 times, and the ship runs safely. Optimal three-dimensional movement efficiency of contra-rotating propellers is realized by the aid of a hydraulic lifting mode or an electric lifting mode. A propulsion unit support is connected with a hull, propulsion force, vibration and impact force are absorbed, and the unit is protected. The front and the back of the lower box are streamline-shaped, the upper section of the lower box is wing-shaped, accordingly resistance is reduced, and the lower box is novel and compact in structure, small in dimension and light in weight. In addition, alternating-current frequency converters or direct-current drivers, a PLC (programmable logic controller) single cable connected with a driving cab liquid crystal display, double-motor double-propeller controllers, full-circle steering wheels and direction indicators are adopted, and double-motor full-circle synchronous electronic omnidistance operation is realized. The electric full-circle rotation inboard and outboard (double-motor) contra-rotating propeller propulsion unit is powered by batteries and emergency generator sets or in a hybrid mode, and zero or low-carbon emission is realized.

Description

Technical field [0001] The invention relates to a power propulsion device for motor ships and boats, in particular to an electric 360° full-slewing inboard and outboard (dual engine) synchronous operation with optimal propulsion and control effects and adopts the world's advanced counter-rotating propeller that can save a lot of power (save fuel consumption) Technical ship propulsion plant. [0002] 1. The fuel-saving principle of the counter-rotating propeller is that the energy lost by the horn-shaped splash of the front propeller is absorbed by the rear propeller and turned into a horizontal straight line to generate greater energy, making the total thrust much higher than that of a single propeller. The invention proves that the energy-saving value is increased by 10-12%, and the speed and propulsion efficiency are increased by about 10% on the basis of the test and sailing practice of installing counter-rotating propellers on a number of different types of ships for ten years...

AI Technical Summary

Problems solved by technology

In terms of cost, traditional propulsion devices have a stern shaft and stern tube system with a length of 1.5-3m or even longer, which is heavy and expensive

In addition, the gearbox has large noise and vibration, large loss of gear transmission power, large bearing load, and complex structure.

More importantly, the gear box of traditional technology is difficult to realize the working mode and technical requirements of counter-rotating propellers

[0012] The invention patent "360° full-turn counter-rotating propulsion device" (patent number: ZL200410052768.X) applied before the present invention is suitable for small and medium-sized merchant ships, passenger ships, engineering ships, and fishing boats in inland rivers. The 360° full-turn mechanism for electric propulsion of this patent It is horizontally arranged, so it is not compact enough to be used on yachts or inland river boats due to the difficulty in positioning. However, the utility model (patent number: ZL201020247439.1) applied for in 2010 changed its 360° full-turn mechanism to a vertical arrangement, which is more compact , but the dimensions of the fixed bracket are still large. When the draft of the ship changes, the overall structure is still unreasonable and compact; no solution or specific method has been proposed for the 360° full-turn synchronization problem of the propulsion device installed with 2 units

In addition, the linearity of the lower box is not good, the steering torque is too large, the resistance is relatively large, and the appearance is not beautiful

In addition, counter-rotating propellers can only perform 360° full-turn two-dimensional motion in the plane, and cannot achieve up-and-down motion, that is, three-dimensional space movement.

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