Telescopic ship propeller wake flow energy recovery power generation device

Abstract

The invention discloses a telescopic ship propeller wake flow energy recovery power generation device which is arranged on a ship with dynamic positioning capacity. A full-revolving propeller and a rotor capable of retracting into the ship are arranged at the tail of the ship, and the rotor is connected with power generation equipment capable of generating power through rotation of the rotor. And the rotor is arranged between the full-revolving propeller and the ship broadside. According to the ship propeller wake flow energy recovery power generation device, the telescopic rotor is arranged around the propeller and used for recovering energy in propeller wake flow during ship operation, mechanical energy is converted into electric energy, and the purposes of energy conservation and emission reduction are achieved. Aiming at the ship in a dynamic positioning state, the propulsion efficiency does not need to be considered. The device is directly used for propeller wake flow energy recovery, and conversion from mechanical energy to electric energy is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of ships, and in particular to a telescopic ship propeller wake energy recovery power generation device. Background Art

[0002] During the dynamic positioning process of an offshore vessel, the wake generated by the rear azimuth thruster contains some energy.

[0003] As the International Maritime Organization's emission standards for existing ship energy efficiency index, ship operation carbon intensity index and other emission standards become increasingly strict, how to improve the energy saving level of ships and reduce energy consumption has become an important research direction that has attracted widespread attention from the shipbuilding industry around the world.

[0004] When operating, offshore vessels usually adopt dynamic positioning to resist environmental loads such as wind, waves and currents, so that they can balance near the predetermined position. Compared with the traditional anchor positioning method, although the dynamic positioning method has the advantages of strong maneuverability, easy operation and fast positioning, the energy in the tail full-rotation propeller wake cannot be recovered, resulting in reduced energy utilization efficiency.

[0005] The patent application with publication number CN116576063A discloses a ship swaying motion energy recovery power generation device. When a ship sails in wind and waves, it moves in six degrees of freedom, causing the position of the power generation device to move vertically. The relative movement between the power generation components converts the swaying energy of the ship into electrical energy, achieving the purpose of ship motion energy recovery.

[0006] On the other hand, marine energy-saving products such as hub cap fins, twisted rudders, and rudder fins are placed behind the propeller to recover the rotational energy loss in the propeller tail vortex, thereby improving propulsion efficiency.

[0007] The prior art has the following defects:

[0008] (1) Using the six-degree-of-freedom motion energy of a ship to generate electricity will affect the power generation efficiency due to the instability of the motion, and will also pose a challenge to the normal operation of the power generation equipment;

[0009] (2) Using the energy of the ship's six degrees of freedom to generate electricity has limitations on the environmental conditions in which the ship operates. When a ship is sailing in calm waters, the amplitude of the movement generated is small and may not be able to meet the energy required for power generation;

[0010] (3) Although devices such as hub cap fins, twisted rudders, and rudder fins can recover propeller wake energy, their efficiency is limited and they cannot be used directly for power generation;

[0011] (4) There are few reports on energy recovery devices for ships in dynamic positioning state. Summary of the invention

[0012] The technical problem to be solved by the present invention is to overcome the above-mentioned defects of the prior art and provide a telescopic ship propeller wake energy recovery power generation device.

[0013] The present invention solves the above technical problems through the following technical solutions:

[0014] A telescopic ship propeller wake energy recovery power generation device is arranged on a ship with dynamic positioning capability; an azimuth propeller and a rotor that can be retracted into the ship are arranged at the stern of the ship, and the rotor is connected to a power generation device that can generate electricity through the rotation of the rotor; the rotor is arranged between the azimuth propeller and the side of the ship.

[0015] Furthermore, the rotation axis centerline of the rotor and the rotation axis centerline of the propeller of the azimuth propeller are at the same height relative to the ship's baseline.

[0016] Furthermore, two azimuth thrusters are provided at the stern of the ship, and the two azimuth thrusters are symmetrically arranged on both sides of the centerline of the ship.

[0017] Furthermore, no rotor is arranged between the two azimuth propellers.

[0018] Furthermore, a plurality of rotors are provided between the azimuth propeller and the side of the vessel.

[0019] Furthermore, the multiple rotors are distributed on a semicircle with the vertical axis of the azimuth propeller as the center, and the radius of the semicircle is 1.2 to 1.6 times the diameter of the propeller of the azimuth propeller.

[0020] Furthermore, on the semicircle, the angle between adjacent rotors is 30° to 50°.

[0021] Furthermore, the semicircle has a radius of 1.5 times the diameter of the propeller of the azimuth propeller, and the angle between adjacent rotors is 45°.

[0022] Furthermore, the power generation equipment is connected to an energy storage device.

[0023] Furthermore, the power generation equipment and the energy storage equipment are both installed in the ship.

[0024] The beneficial effects of the present invention are as follows: the ship propeller wake energy recovery power generation device of the present invention arranges a retractable rotor around the propeller to recover the energy in the propeller wake when the ship is operating, converting mechanical energy into electrical energy, thereby achieving the purpose of energy conservation and emission reduction. The present invention is aimed at ships in a dynamic positioning state, and does not need to take into account propulsion efficiency. When the ship is operating, the propeller continues to output, and the device of the present invention can ensure the stability of the power generation process. The present invention arranges multiple rotors around the propeller to recover the energy of wakes in different directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a side view of a preferred embodiment of the present invention.

[0026] Figure 2 It is a bottom view of a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0027] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0028] like Figure 1 and Figure 2 As shown, a telescopic ship propeller wake energy recovery power generation device is installed on a ship with dynamic positioning capability.

[0029] The stern of the ship is provided with an azimuth propeller 10 and a rotor 20 which can be retracted into the ship. The rotor 20 is connected to a power generation device 21 which can generate electricity through the rotation of the rotor. The rotor 20 is arranged between the azimuth propeller 10 and the side 11 of the ship.

[0030] The rotation axis of the rotor 20 and the rotation axis of the propeller of the azimuth propeller 10 are at the same height relative to the ship's baseline. That is, the height of the rotation axis of the rotor relative to the ship's baseline is H1, and the height of the rotation axis of the propeller of the azimuth propeller relative to the ship's baseline is H2, where H1=H2.

[0031] Two azimuth thrusters 10 are provided at the stern of the ship, and the two azimuth thrusters 10 are symmetrically arranged on both sides of the centerline 12 of the ship.

[0032] No rotor is arranged between the two azimuth propellers.

[0033] A plurality of rotors 20 are provided between the azimuth propeller 10 and the ship side 11 .

[0034] The plurality of rotors 20 are distributed on a semicircle with the vertical axis of the azimuth propeller as the center, and the radius of the semicircle is 1.2 to 1.6 times the diameter of the propeller of the azimuth propeller.

[0035] On the semicircle, the angle between adjacent rotors is 30° to 50°.

[0036] Preferred solutions, such as Figure 2 As shown, the radius of the semicircle is 1.5 times the propeller diameter D of the full-rotation propeller, and the angle between adjacent rotors is 45°; the number of rotors within the semicircle is 5.

[0037] The power generation device 21 is connected to the energy storage device 22. The power generation device 21 and the energy storage device 22 are both arranged in the ship.

[0038] The ship propeller wake energy recovery power generation device of the present invention has a rotor device extending out of the ship when the ship is in a dynamic positioning state, and ensures that the rotation axis centerline of the rotor and the rotation axis centerline of the propeller of the azimuth propeller are at the same height relative to the ship's baseline. The propeller of the azimuth propeller generates a wake when working, and the energy in the wake drives the rotor to rotate. The generated mechanical energy is converted into electrical energy by the power generation equipment and stored. When the ship is in a sailing state, the rotor retracts into the stern cabin to avoid interfering with the flow field and reducing the propulsion efficiency.

[0039] The ship propeller wake energy recovery power generation device of the present invention is suitable for ships with dynamic positioning capabilities. The present invention arranges a retractable rotor around the propeller to recover the energy in the propeller wake during ship operation, converting mechanical energy into electrical energy to achieve the purpose of energy saving and emission reduction.

[0040] The advantages of the present invention are:

[0041] (1) The present invention is aimed at ships in a dynamic positioning state, and does not need to take into account propulsion efficiency;

[0042] (2) It can be directly used for propeller wake energy recovery to achieve the conversion of mechanical energy into electrical energy;

[0043] (3) The continuous output of the propeller during ship operation can ensure the stability of the power generation process;

[0044] (4) Arranging multiple rotors around the propeller can recover the energy of wakes in different directions.

[0045] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A retractable ship propeller wake energy recovery power generation device, which is installed on a ship with dynamic positioning capability; characterized in that: The stern of the ship is provided with an azimuth propeller and a rotor that can be retracted into the ship, the rotor is connected to a power generation device that can generate electricity through the rotation of the rotor; the rotor is arranged between the azimuth propeller and the side of the ship.

2. The telescopic ship propeller wake energy recovery power generation device according to claim 1, characterized in that: The rotation axis of the rotor and the rotation axis of the propeller of the azimuth thruster are at the same height relative to the ship's baseline.

3. The telescopic ship propeller wake energy recovery power generation device according to claim 2, characterized in that: The stern of the ship is equipped with two azimuth thrusters, which are symmetrically arranged on both sides of the centerline of the ship.

4. The telescopic ship propeller wake energy recovery power generation device according to claim 3, characterized in that: No rotor is arranged between the two azimuth propellers.

5. The telescopic ship propeller wake energy recovery power generation device according to claim 4, characterized in that: Multiple rotors are provided between the azimuth thruster and the side of the vessel.

6. The telescopic ship propeller wake energy recovery power generation device according to claim 5, characterized in that: The multiple rotors are distributed on a semicircle with the vertical axis of the azimuth propeller as the center, and the radius of the semicircle is 1.2 to 1.6 times the diameter of the propeller of the azimuth propeller.

7. The telescopic ship propeller wake energy recovery power generation device according to claim 6, characterized in that: On the semicircle, the angle between adjacent rotors is 30° to 50°.

8. The telescopic ship propeller wake energy recovery power generation device according to claim 7, characterized in that: The radius of the semicircle is 1.5 times the diameter of the propeller of the azimuth propeller, and the angle between adjacent rotors is 45°.

9. The telescopic ship propeller wake energy recovery power generation device according to claim 1, characterized in that: The power generation equipment is connected to an energy storage device.

10. The telescopic ship propeller wake energy recovery power generation device according to claim 9, characterized in that: Both the power generation equipment and the energy storage equipment are installed inside the ship.

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