A ship auxiliary power device based on tidal energy

Abstract

The present invention provides a tidal energy-based ship driving auxiliary power device, which mainly includes a tidal energy conversion system, an energy storage system and an auxiliary power drive system. Among them, the tidal energy conversion system is used to convert tidal energy into electrical energy and transmit the electrical energy to the energy storage system; the energy storage system is used to store electrical energy on the one hand, and to provide electrical energy to the auxiliary power drive system when needed on the other hand; the auxiliary power drive system is used to provide auxiliary (alternative) power for ship driving; this device is used as an auxiliary power for heavy oil, diesel and other fossil fuels, and can be used as a substitute (cooperation) to reduce the carbon emissions of heavy oil, diesel and other fossil fuels with high pollution, and has clean and environmentally friendly properties. The device has a simple principle and can be used for a long time and unlimited times, while reducing the purchase of diesel or coal-fired power raw materials and saving costs.

Description

Technical Field

[0001] The invention belongs to the field of renewable energy, especially tidal energy application, and particularly relates to a ship driving auxiliary power device based on tidal energy. Background Art

[0002] With the development of the economy, my country's waterborne cargo transportation volume and port throughput have ranked first in the world for many years. Seven of the world's ten busiest ports are in China, accounting for more than a quarter of the global cargo throughput. Busy water and sea transportation has brought air pollution. Since the fuel used by ships is mainly residual oil or heavy oil, both belong to the category of diesel, its sulfur content is 100 to 3,500 times that of motor oil, and it also contains heavy metals such as cadmium, vanadium, and lead. In the Beijing-Tianjin-Hebei, Yangtze River Delta, Pearl River Delta and coastal and riverside areas, ship and port emissions have become one of the important sources of air pollution.

[0003] Tidal currents are mainly caused by tides. my country has extremely rich tidal energy resources. The theoretical average power of 130 coastal waterways is about 1.4×10 4 MW. Zhejiang, Fujian, Shandong and the Taiwan Strait are among the regions with the richest tidal energy resources in the world. As a green and renewable energy, tidal energy has the characteristics of high energy density, strong predictability and rich reserves, and is increasingly valued by countries around the world. Summary of the invention

[0004] The purpose of the present invention is to provide a ship driving auxiliary power device based on tidal energy, which solves the environmental pollution problem caused by the existing ship driving power energy.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] The present invention provides a tidal energy-based ship driving auxiliary power device, comprising a tidal energy conversion system, a lifting system, an energy storage system, an auxiliary power drive system and a control system. The tidal energy conversion system is used to convert tidal energy into electrical energy and transmit the electrical energy to the energy storage system; the lifting system is used to place the tidal energy conversion system in the seawater or lift it to the cabin; the energy storage system is used to store electrical energy and provide electrical energy to the auxiliary power drive system; the auxiliary power drive system is used to provide auxiliary power for ship driving; and the control system is used to control the normal operation of the device.

[0007] Preferably, the tidal energy conversion system comprises a box, an impeller, a vertical rotating shaft, a speed increasing box and a generator. The box is designed with bell-shaped openings at both ends, and the bell-shaped openings are in a horizontal state; one end of the vertical rotating shaft is connected to the box, and four impellers are evenly distributed along the circumference of the end, and the impellers are placed in the inner cavity of the box; the other end of the vertical rotating shaft is connected to the generator through the speed increasing box; and the generator is connected to the energy storage system.

[0008] Preferably, the vertical rotating shaft is a two-section structure, namely an upper section and a lower section, and the two are connected by a flange; the impeller is arranged in the lower section, and the lower section is connected to the lower guide plate of the box body; the upper section is a nested multi-layer telescopic structure.

[0009] Preferably, a direction sensor and a yaw device are installed on the casing of the tidal energy conversion system; the direction sensor and the yaw device are both connected to the control system.

[0010] Preferably, the energy storage system comprises a battery pack, the input end of the battery pack is connected to the generator end of the tidal energy conversion system; the output end of the battery pack is connected to the auxiliary power drive system.

[0011] Preferably, the input end of the battery pack is connected to the generator output port of the tidal energy conversion system through a rectifier.

[0012] Preferably, the auxiliary power drive system comprises a travel motor, a transmission shaft and a propeller, wherein one end of the transmission shaft is connected to the propeller, and the other end is connected to the output shaft of the travel motor; and the travel motor is connected to the energy storage system.

[0013] Preferably, the control system includes a controller, which is provided with an input port and an output port; the output port is connected to the energy storage system and the yaw device installed on the tidal energy conversion system; the input port is connected to the direction sensor installed on the tidal energy conversion system.

[0014] Preferably, the lifting system comprises a lifting motor; the output shaft of the lifting motor is connected to two steel cables; the steel cables are connected to the tidal energy conversion system box through locks; and the lifting motor is connected to the control system.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention provides a tidal energy-based ship driving auxiliary power device, which utilizes the favorable conditions of high tidal velocity and obvious shore current collection at the port where the ship is docked, to convert the energy of clean renewable energy tidal energy into electrical energy for storage. When the device is required to work, the energy storage system outputs electrical energy to the power drive system, so that the motor works to drive the propeller to rotate, thereby driving the ship. As an auxiliary power for fossil fuels such as heavy oil and diesel, it can be used as a substitute (cooperation) to reduce the carbon emissions of fossil fuels such as heavy oil and diesel with high pollution, and has clean and environmentally friendly properties; the device has a simple principle and can be used for a long time and unlimited times, without the need to repeatedly (or in small quantities) purchase diesel or coal-fired power raw materials, saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the auxiliary power unit for ship travel;

[0018] Figure 2 It is the control system connection diagram. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0020] like Figure 1 As shown, the auxiliary power device for ship driving based on tidal energy provided by the present invention includes five parts: tidal energy conversion system 1, lifting system 2, energy storage system 3, auxiliary power drive system 4 and control system 5. Among them, the tidal energy conversion system 1 is used to convert tidal energy into electrical energy; the lifting system 2 is used to place the tidal energy conversion system in the sea water or lift it to the cabin; the energy storage system 3 is used to uniformly store and output the power source electrical energy generated by the tidal energy conversion system; the auxiliary power drive system 4 is used to provide auxiliary (alternative) power and drive for ship driving; the control system 5 is used to control the normal operation of the device.

[0021] Specifically, the tidal energy conversion system includes a housing 1-1, an impeller 1-2, a vertical shaft 1-3, a speed increaser 1-4, a generator 1-5 and a foundation 1-6. The housing 1-1 is composed of four guide plates, upper, lower, front and rear; the lower guide plate is connected to the foundation 1-6; the four guide plates are combined into a trumpet design for the left and right ends through which seawater can flow, and the trumpet is in a horizontal state. This design can increase the amount of tidal energy entering, speed up the speed of tidal energy passing through the impeller, and ensure that the tidal energy in the horizontal axis direction passes quickly through the impeller 1-2.

[0022] The impeller 1-2 is placed in the inner cavity of the box 1-1, and four impellers are evenly arranged. The impeller 1-2 is connected to the vertical shaft 1-3 through a support arm. In this way, the current flows through the impeller, and the rotation of the impeller 1-2 drives the vertical shaft 1-3 to rotate synchronously.

[0023] The vertical shaft 1-3 is divided into two sections, the upper section is above the box, and the lower section is below, and the upper and lower sections are connected by flanges; the lower section is a fixed length, and the bottom is installed on the lower guide plate. The upper section adopts a nested multi-layer telescopic structure, and each layer of the shaft inner wall has a locking structure at both ends to ensure that each layer can be stretched to a certain range and fixed without detaching.

[0024] The axial direction of the vertical rotating shaft 3 is perpendicular to the bell mouth direction of the box body 1 - 1 .

[0025] The innermost layer of the multi-layer nesting of the vertical rotating shaft 1-3 is connected to the speed increaser 1-4; the output end of the speed increaser 1-4 is connected to the input end of the generator 1-5, and the speed increaser 1-4 and the generator 1-5 are fixedly placed in the shipboard and do not contact the seawater. The end of the generator 1-5 is a cable 1-7 that transmits the generated electrical energy to the energy storage system 3.

[0026] Direction sensors 1-8 are provided on the upper guide plate of the tidal energy conversion system box to receive tidal energy flow direction information and connect with the control system.

[0027] A yaw device 1-9 for changing the direction of the box body is arranged in the box body 1-1. The yaw device 1-9 is connected to the control system and is controlled by the control system.

[0028] The lifting system includes a lifting motor 2-1, an output shaft 2-2 and a steel cable 2-3. The steel cables 2-3 are arranged symmetrically. One end of each steel cable is fixed to the output shaft 2-2, and the other end passes through the shipboard and is connected to the upper guide plate of the tidal energy conversion system box 1-1 through a lock. In this way, the tidal energy conversion system box 1-1 is driven to rise and fall by the forward and reverse rotation of the lifting motor 2-1.

[0029] When not working, the box body 1-1 and the impeller 1-2 are placed integrally inside the cabin; when working, the hatch is opened, and the lifting system lowers the box body 1-1 into the sea water, and the layers embedded in the vertical shaft 1-3 are synchronously and passively stretched until the foundation 1-6 is located on the seabed.

[0030] The energy storage system 3 is composed of a battery group 3-1, and the material used is the most common lead-acid battery on the market.

[0031] Both ends of the battery pack 3-1 casing are input and output ports of various common specifications. The input end of the battery pack 3-1 is connected to the electric energy generated by the tidal energy conversion system; the output end of the battery pack 3-1 is connected to the driving motor 4-1 of the auxiliary power drive system 4; at the same time, the battery pack 3-1 is also connected to the control system to receive charging and discharging commands from the control system.

[0032] The input end of the battery pack 3-1 is connected to the cable 1-7 of the output port of the generator 1-5 through the rectifier 3-2; the function of the rectifier 3-2 is to convert the alternating current generated by the generator into direct current that can be received by the input end of the battery.

[0033] The auxiliary power drive system 4 includes a travel motor 4-1, a transmission shaft 4-2 and a propeller 4-3, wherein the travel motor 4-1 is a DC motor, one end of the transmission shaft 4-2 is connected to the propeller 4-3, and the other end is connected to the output shaft of the travel motor 4-1. In this way, the electricity released by the energy storage system can be finally converted into the rotation driving force of the propeller.

[0034] like Figure 2 As shown, the control system includes a controller 5-1, and the controller 5-1 is provided with an input port 5-2-1 and an output port 5-2-2; the output port 5-2-2 is respectively connected to the yaw device 1-9, the lifting motor 2-1 and the battery pack 3-1.

[0035] The input port 5-2-1 is connected to the direction sensor 1-8 through a control line; the direction sensor 1-8 transmits the collected data to the controller 5-1, and the controller 5-1 determines whether the opening direction of the box is consistent with the tidal direction through an internal algorithm. If there is a deviation, a start signal is output through the output port 5-2-2 to control the yaw device 1-9 to rotate it to align with the tidal direction.

[0036] The output port 5-2-2 is connected to the lifting motor 2-1. When the box 1-1 needs to be lifted or lowered, the person gives a forward (reverse) signal instruction on the computer operating terminal according to actual needs, so that the lifting motor 2-1 works and the output shaft 2-2 rotates forward (reverse), driving the box 1-1 of the tidal energy conversion system to be pulled up to the cabin or sink to the bottom of the sea.

[0037] The present invention is divided into the parking charging and discharging driving stages, and the specific process is as follows:

[0038] Docking and charging stage: When the ship is docked at the port, the tidal speed of the port and the shore is very high, and the current collection effect of the coast can make the tidal current more abundant. During this period, the good tidal energy is fully utilized to achieve the purpose of storing more clean energy for the ship. First, open the hatch, the control system sends a start signal to the lifting motor 2-1, the motor working output shaft 2-2 rotates, and the steel cable 2-3 drives the box 1-1 and the impeller 1-2 in the tidal energy conversion system to dive into the sea (the upper part of the vertical shaft 1-3 is embedded with multiple layers of shafts and also passively follows the stretching synchronously) until the foundation 1-6 is temporarily located on the seabed. The seawater flows through the impeller 1-2 of the tidal energy conversion system to rotate, and then drives the vertical shaft 1-3 to rotate, dragging the speed increaser 1-4 and the generator 1-5 to work and generate electricity; the cable 1-7 at the output end of the generator is connected to the rectifier 3-2 of the energy storage system, and the AC power generated by its generator is converted into DC power and transmitted to the battery pack 3-1 for storage, completing the charging work.

[0039] Auxiliary driving discharge stage: When the ship is ready to depart after docking at the port, the control system first sends a retracting signal to the lifting motor 2-1, and the working output shaft 2-2 of the lifting motor 2-1 rotates in the opposite direction (the multi-layer shafts nested in the upper section of the vertical shaft 1-3 synchronously and passively follow the contraction), and finally the box 1-1 of the tidal energy conversion system is retracted into the cabin, and the hatch cover is closed, so that the tidal energy conversion system does not constitute resistance to the ship's driving during the ship's driving.

[0040] When the device is needed to assist (replace) the original power system of the ship during its travel, the control system sends a discharge signal to the energy storage system 3, and the battery pack 3-1 generates direct current to drive the driving DC motor 4-1, which then rotates through the transmission shaft 4-2 and the propeller 4-3, and finally converts the electrical energy into rotational mechanical energy, providing the ship with thrust auxiliary power to enable it to travel.

Claims

1. A ship auxiliary power device based on tidal energy, characterized in that: The invention comprises a tidal energy conversion system (1), a lifting system (2), an energy storage system (3), an auxiliary power drive system (4) and a control system (5), wherein the tidal energy conversion system (1) is used to convert tidal energy into electrical energy and transmit the electrical energy to the energy storage system (3); the lifting system (2) is used to place the tidal energy conversion system in seawater or lift it into a cabin; the energy storage system (3) is used to store electrical energy and provide electrical energy to the auxiliary power drive system (4); the auxiliary power drive system (4) is used to provide auxiliary power for the ship to travel; and the control system (5) is used to control the normal operation of the device; The tidal energy conversion system comprises a housing (1-1), an impeller (1-2), a vertical rotating shaft (1-3), a speed increasing box (1-4) and a generator (1-5); wherein the housing (1-1) is a housing designed with bell-mouth openings at both ends; one end of the vertical rotating shaft (1-3) is connected to the housing (1-1), and four impellers (1-2) are evenly distributed along the circumference of the end, and the impellers (1-2) are placed in the inner cavity of the housing (1-1); the other end of the vertical rotating shaft (1-3) is connected to the generator (1-5) through the speed increasing box (1-4); the generator (1-5) is connected to the energy storage system (3); The vertical rotating shaft (1-3) is a two-section structure, comprising an upper section and a lower section, and the two sections are connected via a flange; the impeller (1-2) is arranged in the lower section, and the lower section is connected to the lower guide plate of the box body (1-1); the upper section is a nested multi-layer telescopic structure; A direction sensor (1-8) and a yaw device (1-9) are installed on the box of the tidal energy conversion system; the direction sensor (1-8) and the yaw device (1-9) are both connected to the control system; The auxiliary power drive system (4) comprises a travel motor (4-1), a transmission shaft (4-2) and a propeller (4-3), wherein one end of the transmission shaft (4-2) is connected to the propeller (4-3), and the other end is connected to the output shaft of the travel motor (4-1); the travel motor (4-1) is connected to the energy storage system (3); The lifting system comprises a lifting motor (2-1); the output shaft (2-2) of the lifting motor is connected to two steel cables (2-3); the steel cables (2-3) are connected to a tidal energy conversion system box (1-1) via a lock; and the lifting motor (2-1) is connected to a control system.

2. A tidal current energy-based ship driving auxiliary power device according to claim 1, characterized in that: The energy storage system (3) comprises a battery pack (3-1), wherein an input end of the battery pack (3-1) is connected to a generator end of a tidal energy conversion system (1); and an output end of the battery pack (3-1) is connected to an auxiliary power drive system (4).

3. A ship driving auxiliary power device based on tidal energy according to claim 2, characterized in that: The input end of the storage battery group (3-1) is connected to the output port of the generator (1-5) of the tidal energy conversion system through the rectifier (3-2).

4. The auxiliary power device for ship travel based on tidal energy according to claim 1, characterized in that: The control system (5) comprises a controller (5-1), the controller (5-1) being provided with an input port (5-2-1) and an output port (5-2-2); the output port (5-2-2) being connected to an energy storage system (3) and a yaw device (1-9) installed on a tidal energy conversion system; and the input port (5-2-1) being connected to a direction sensor (1-8) installed on the tidal energy conversion system.

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