Submersible DC motor wave energy power generation device

Abstract

A submersible DC motor wave energy power generation device includes a submersible and a vertical DC motor, a horizontal DC motor, a lead ball, a straight rod, a counterweight, and a motor fixing rod located inside the submersible; the vertical DC motor converts the vertical component of the motion of water particles in sea surface waves into electrical energy, and the horizontal DC motor converts the horizontal component of the motion of water particles in sea surface waves into electrical energy; one end of the motor fixing rod is fixed to the inner wall of the submersible, and the other end is connected to the stator of the DC motor; the mover and the straight rod are screwed together, and the mover can rotate around the bolt; the lead ball is connected to the straight rod, and when the lead ball performs inertial motion, it transfers inertia to the mover by pushing the straight rod. When the submersible performs elliptical motion with the waves, the lead ball, the submersible and the stator generate relative motion, thereby causing the stator and the mover to generate relative motion, generating current, which is then output to the inner wall of the submersible through the wires inside the motor fixing rod, and the wires of the two motors transmit the current to the outside through the sealed holes in the submersible.

Description

Technical Field

[0001] The present invention relates to the field of wave energy power generation, in particular to a submersible DC motor wave energy power generation device. Background Art

[0002] The current development and utilization of wave energy presents significant technical challenges, primarily due to its low energy density. Waves are a reciprocating motion with slow speed and unstable energy. Furthermore, wave power generation devices require poor operating environments and large initial investments. However, countries with advanced wave energy research are already achieving wave power generation capacities in the MW range and are gradually achieving commercialization.

[0003] The conversion process of wave energy into electrical energy can generally be divided into three steps: the first step is wave energy aggregation, which needs to be designed in combination with the characteristics of wave movement and the working environment of the sea area, and is most important for wave energy extraction efficiency and equipment safety; the second step is energy transfer, which converts low-speed and low-pressure wave energy into high-speed and high-pressure mechanical energy; the third step is generator power generation, which mainly involves appropriate modification of existing generators.

[0004] The main development and utilization principles of wave energy aggregation are as follows[1]:

[0005] (1) Using vertical wave motion, such as the nodding duck type and the wave raft type;

[0006] (2) Using the change of wave static pressure, such as Russell rectifier, air bag type, etc.

[0007] (3) Using the movement of water particles, such as water wheels;

[0008] (4) Utilize the dynamic pressure changes caused by the horizontal motion of waves, such as the horizontal reciprocating type in the wave-breaking zone.

[0009] In the mid-1960s, Yoshio Masuda of Japan[2] first successfully developed a micro wave power generation device for navigation lights and put it into commercial production. In the 1980s, more than 20 wave energy conversion devices or power stations were built in various countries. More than 20 countries have carried out research on wave energy utilization. The most active research on wave energy is carried out in countries such as the United Kingdom, Japan, and Norway, with the rated power mainly in the hundreds of kilowatts.

[0010] At present, Japan has built more than 1,500 wave power generation devices. Since the mid-1980s, four shore-based fixed and breakwater-type wave power stations have been built, with a single unit capacity of 40 to 125 kW. Among them, the "Hai Ming" wave power generation ship built in the early 1980s is the most famous. In 1987, the Japan Center for Marine Science and Technology organized the development of a wave power generation device called "Mighty Whale" [3]. The device was launched in the offshore waters of Gosho Bay, Mie Prefecture at the end of 1997 and put into commercial operation in 1998. The device can not only absorb wave energy to generate electricity, but also has the function of an independent energy platform and can play a role in stabilizing waves. The fixed breakwater-type 130 kW wave power device put into operation in September 1996 is the largest capacity device in Japan. It was installed by Tohoku Electric Power Company on the southern breakwater of Haramachi Thermal Power Plant.

[0011] Since the 1970s, the UK has prioritized wave power research within its renewable energy development efforts. By the 1980s, the UK had become a global center for wave energy research. The renowned Pelamis wave power generator was invented by British scientists Francis Farley and Rod Rennie. Resembling a water snake, the Pelamis is a unique device that harnesses the relative motion of floating bodies generated by the undulations of the ocean water to generate electricity. Resembling a marine organism, it utilizes a raft-type hydraulic system and boasts an installed capacity of 700 kW. Its advantages lie in its use of accumulators, resulting in stable output and strong resistance to wind and wave shocks. Currently, this device is in commercial operation. In the early 1990s, the UK built 75 kW and 20 MW oscillating water column and shore-based fixed wave power stations on Islay and Ospreay, Scotland. The world's first commercial wave generator began generating electricity in August 1995 in the Firth of Clyde, UK, with an installed capacity of 2,000 kW. In November 2000, the British company Wavegen built a wave energy power station near the Scottish Islay Island using the shore-mounted wave energy device LIMPET[5] (Land-Installed-Marine-Powered Energy Transformer). The power generation capacity is 500KW, which can provide lighting electricity for 400 households. The wave energy power density at the power station is 25KW / m. The wave power generation project "Wave Hub" located in Cornwall on the west coast of the United Kingdom completed comprehensive testing at the end of 2010 and is ready for formal operation. "Wave Hub" cost 42 million pounds and is a giant wave energy converter similar to a four-pin socket. In order to better capture the energy of Atlantic waves, the device was installed 50 meters below the seabed 16 kilometers offshore. The device created the "world's largest" wave energy technology pilot. The electricity generated by the Wave Hub is transmitted to the shore via a 33 kV transmission cable and then connected to the power grid through a newly built substation.

[0012] Norway has made significant contributions to the theoretical design of wave power generation devices, proposing phase control principles and bell-shaped, contracting channel wave energy devices [6-8]. Norway invested 100 million kroner in theoretical research and experiments on wave power generation, and in 1985, it built an oscillating water column wave power station with an installed capacity of 500 kW and a concentrated wave reservoir wave power station with an installed capacity of 350 kW, respectively, on the island of Toftestallen. Norway is currently collaborating with Indonesia to build a contracting channel wave power station on the island of Java.

[0013] Portugal's wave power research started relatively late, with technology primarily imported. However, Portugal boasts excellent natural conditions for wave energy, and the government and research institutions are increasingly focusing on wave energy resources. The world's first commercial wave power plant, "Oceanus," is located on Portugal's northern coast. It began operation in 2008 and was built by Portuguese renewable energy company Enersis approximately 4.8 km from the coast. The plant consists of three "Oceanus" generator sets, designed and built by a Scottish wave energy company, with a designed generating capacity of 750 kW.

[0014] Other countries have also conducted some research on wave power. For example, in 2000, Germany's Siemens Vioth Water Electronics was the first to connect wave power to the grid. The United States will operate five commercial wave power plants in Humboldt Bay, California, in 2011, each with a power generation capacity of up to 1,000 kW. Australia, the Netherlands, Denmark, Israel, Canada, Indonesia, and other countries have also conducted some research and development on wave power, but this research primarily focuses on wave power devices and principles, with limited commercial applications.

[0015] my country's wave power research began in the 1970s. In 1975, my country manufactured a 1KW wave power buoy and tested it on Shengshan Island in Zhejiang Province. Since 1985, my country has developed a variety of small products, of which more than 600 are used as navigation lights and exported to Japan and other countries [9]. In 1990, a 3KW shore-based oscillating water column wave power station was successfully built on Dawanshan Island in Guangdong. The Guangzhou Energy Research Institute later converted it into a 20KW wave power station and successfully conducted a trial power generation in February 1996. After gradual improvement, it will provide supplementary power to the island. In early 2005, the 100KW shore-based oscillating water column wave power station on the Zhalang Peninsula in Shanwei City, built by the Guangzhou Energy Research Institute, successfully completed its first real sea condition test of the wave energy independent stable power generation system, moving from the 10KW level to the 100KW level. A 100kW pendulum wave power station developed by the Tianjin State Oceanic Administration's Marine Technology Institute successfully entered trial operation on Daguan Island in Jimo, Qingdao, in September 1999. Tsinghua University and other institutions have also conducted design and research on floating wave power generation devices.

[0016] Currently, the main wave power generators can be divided into two categories: rotary motors and linear motors. The second stage of wave power generation, energy transfer, is closely related to the type and model of generator. If only the energy from the linear motion of waves is captured and a linear motor is used for power generation, this second stage can be omitted. Wave power generation systems using rotary motors include the famous Pelamis device. The Pelamis device consists of five cylindrical components connected by hinges. Waves drive the relative motion between the components, compressing the fluid through the lever principle, thereby driving a hydroelectric generator. Static wave power generation systems using rotary motors include the Wave Dragon. The Wave Dragon's power generation principle is that when waves arrive, seawater flows into a reservoir, which then drives a low-head hydroelectric generator installed in the center of the reservoir to rotate and generate electricity. Limpet is a wave power generation device developed by Wavegen Ltd. in Ireland. Installed on the coast, the Limpet operates on an oscillating air column, which in turn generates electricity through an air-driven turbine. During the 15th Five-Year Plan period, the Guangzhou Energy Research Institute launched a project to develop oscillating float wave power generation. The power generation principle is that the float moving up and down in the waves drives the hydraulic system to lift water to a high-level water reservoir, and then uses the water flowing out of the high-level water reservoir to drive the turbine to generate electricity.

[0017] The Archimedes Wave Swing (AWS) is the world's first directly driven wave power generation device developed by Teamwork Technology

[10] . Its working principle is to use the weight difference of the water body at the wave peak and trough above a fixed point to drive a linear motor. When the wave peak reaches the upper part of the device, the gravity of the water presses the lid of the cavity downward, and the air pressure in the cavity increases; when the wave trough reaches the upper part of the device, the air pressure in the cavity pushes the lid upward, so that the lid moves up and down. At the same time, the lid is directly connected to the translator of the linear motor, forming a relative motion between the stator and the mover of the linear motor, converting wave energy into electrical energy.

[0018] Wave Energy Conversion (WEC) is a direct-drive wave power generation system developed by Uppsala University

[11] . Its working principle is as follows: it consists of a float and a linear motor generator fixed to the seabed. The float and the generator are connected by a steel cable. When the wave crest comes, due to the buoyancy of the water, the float moves upward, and at the same time drives the mover of the linear motor to move upward, tightening the spring. When the wave trough comes, the float moves downward, and the spring also pulls the mover of the linear motor downward, forming a relative motion between the mover and stator of the linear motor, converting wave energy into electrical energy.

[0019] The main defects of wave energy power generation devices in existing technologies are: the wave energy capture rate is not high; the electricity conversion rate is also low; there are too many moving parts exposed to seawater, which are prone to corrosion and adhesion, and the equipment durability is poor; it is greatly affected by the rise and fall of tides; and the scale of the power station is not easy to expand.

[0020] References

[0021] [1] Chen Xuelei, ed. Marine Resources Development and Management. Beijing, Science Press, 2000.

[0022] [2] Takehiro Miyazaki, Yoshio Masuda. Research And Development Of Wave PowerElectricity Generation System [J]. Ocean Management Special Issue, 1978

[0023] [3]Research And Development Of Wave Energy Utilization Technology-Development Of Offshore Floating Type Wave Energy Converter / Mighty Whale / ,Jamstec(In Japanese),Japan(2004).

[0024] [4] Brochure Of Pelamis P-750Wave Energy Converter, Pelamis Wave Power Ltd. (2008).

[0025] [5]Young-Do Choi, Chang-Goo Kim, You-Taek Kim, Etc.A Performance StudyOn A Direct Drive Hydro Turbine For Wave Energy Converter.Journal OfMechanical Science And Technology 24(11)(2010):2197~2206.

[0026] [6] Budal K, Falnes J.Energy Potential In Ocean Waves-Conversion OfWave Energy Into Useful Forms. Physica Norvegica, 1976(3):175-175.

[0027] [7] Budal K, Falnes J. Optimum Operation Of Improved Wave-PowerConverter. Marine Science Communications, 1977(2):133-150.

[0028] [8]Johannes Falnes.AReview Of Wave-Energy Extraction.MarineStructures, 2007(20):185-201.

[0029] [9] Li Chengkui, Liao Wenjun, Wang Yuxin. Research progress of ocean wave energy generation technology in the world. Equipment Machinery, 2010(2):68-73.

[0030]

[10] H. Bolind; Ma Yuanting. Design of a new wave energy generator system. Water Resources and Hydropower Express, 2005(7).

[0031]

[11] J. Tedd, JPKofoed, M. Jasinski, Etc. Advanced Control Techniques ForWEC Wave Dragon, Proc. The 7th European Wave And Tidal Energy Conference, Porto, Portugal (2007). Summary of the Invention

[0032] The purpose of the present invention is to solve the above-mentioned problems in the prior art and provide a submersible DC motor wave energy power generation device with higher wave energy capture rate and electric energy conversion rate.

[0033] In order to achieve the above object, the present invention adopts the following technical solutions:

[0034] A submerged tube DC motor wave energy power generation device, comprising a submerged tube and a vertical DC motor, a horizontal DC motor, a lead ball, a straight rod, a counterweight, and a motor fixing rod located inside the submerged tube;

[0035] The submersible is located near the sea surface and is used to provide buoyancy for the power generation device; the counterweight is located at the bottom of the submersible and is used to adjust the total weight of the submersible so that the total buoyancy of the submersible is only slightly greater than the total weight; the vertical DC motor is used to convert the vertical component of the motion of the water particles in the sea surface waves into electrical energy, and the horizontal DC motor is used to convert the horizontal component of the motion of the water particles in the sea surface waves into electrical energy; the motor fixing rod is provided with two groups of motor fixing rods in the horizontal and vertical directions, one end of the motor fixing rod is fixed to the inner wall of the submersible, and the other end of the motor fixing rod is fixedly connected to the stator of the vertical DC motor or the stator of the horizontal DC motor; the mover of the vertical DC motor is connected to the mover and the straight rod of the horizontal DC motor by bolts and nuts, and the mover can rotate around the bolt, and the relative position of the mover on the straight rod is adjusted according to the long and short axis parameters of the elliptical motion trajectory of the sea surface water particles;

[0036] The lead ball is fixedly connected to one end of the straight rod and is suspended in the air. When the lead ball performs inertial motion, it transfers inertia to the mover by pushing the straight rod. When the submersible performs elliptical motion with the waves, the lead ball, the submersible cylinder and the stator generate relative motion, thereby causing the stator and the mover to generate relative motion, generating current. The current generated by the vertical DC motor and the horizontal DC motor is output to the inner wall of the submersible cylinder through the wires inside the motor fixing rod, and the wires of the two motors transmit the current to the outside through the sealed holes of the submersible cylinder.

[0037] The submerged tube is fixed by a cable or an anchor chain.

[0038] In the present invention, multiple submersible tubes can be connected in series and fixed to the seabed or other fixed points through cables or anchor chains.

[0039] The electric current output by the submersible is transmitted to the land through electric wires along cables or anchor chains.

[0040] The submerged tube is made of high-strength non-metallic material.

[0041] The material of the submerged tube is plastic or PVC.

[0042] The straight rod is a rigid body made of metal material.

[0043] The motor fixing rod is a rigid body made of metal material.

[0044] The motor fixing rod is a rod formed by integrally casting the same material as the submerged cylinder wall.

[0045] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0046] 1. The present invention combines the characteristics of wave motion. Unlike the existing technology that only focuses on wave height, the present invention captures the maximum elliptical motion energy of water particles near the water surface line based on the characteristics of water particles making elliptical motion. The wave height is only the length of its elliptical minor axis, which can capture more water particle energy.

[0047] 2. The present invention reduces the energy transmission link of wave energy generation, directly decomposes the elliptical motion of water particles into two linear motions, drives two DC motors to generate electricity, and has higher energy conversion efficiency.

[0048] 3. The present invention has a higher wave energy capture rate: under limited water depth conditions, it can capture wave energy in both vertical and horizontal directions.

[0049] 4. The present invention has a higher electric energy conversion rate: it uses a DC motor, can set the long and short axes according to the water depth and wave height, and localizes the parameters to improve the conversion rate.

[0050] 5. The device of the present invention has few external moving parts, is corrosion-resistant and anti-adhesive, and is not easily damaged in high sea conditions.

[0051] 6. The mooring structure of the present invention has an anchor chain form, which is less affected by tidal fluctuations and has good conversion prospects.

[0052] 7. The present invention can facilitate the expansion of the power station scale. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 This is a structural diagram of the vertical position of the submerged tube.

[0054] Figure 2 Schematic side view of the internal structure of the submersible tube.

[0055] Figure 3 Schematic diagram of the front view of the internal structure of the submersible.

[0056] Figure 4 This is a schematic diagram of the exploded structure of the submersible DC motor wave energy power generation device.

[0057] Figure numerals: submersible tube 1, vertical DC motor 2, horizontal DC motor 3, shot put 4, straight rod 5, counterweight 6, motor fixing rod 7, stator 21 of vertical DC motor, mover 22 of vertical DC motor, stator 31 of horizontal DC motor, mover 32 of horizontal DC motor. DETAILED DESCRIPTION

[0058] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0059] like Figures 1 to 4 As shown, Figure 1 It shows the water surface position, movement direction and anchoring position of the submersible when working. Figure 2 and Figure 3 The internal structure of the submersible is shown;

[0060] The submersible DC motor wave energy power generation device of this embodiment includes a submersible 1 and a vertical DC motor 2, a horizontal DC motor 3, a lead ball 4, a straight rod 5, a counterweight 6, and a motor fixing rod 7 located inside the submersible 1.

[0061] The submersible 1 is made of high-strength non-metallic materials such as plastic or PVC and is shaped like an oil drum or a wine barrel. The submersible 1 is used to provide buoyancy to the power generation device; transfer wave energy to the internal power generation device; protect the internal device from being soaked and corroded by seawater; protect the internal device from being damaged by wave energy, and provide a mooring connection for the entire system. The submersible 1 is located near the sea surface and is fixed to the seabed or other fixed points by cables or anchor chains. Multiple submersibles 1 can be connected in series and fixed to the seabed or other fixed points by cables or anchor chains. The current output by the submersible 1 is transmitted to land through electric wires along the cables or anchor chains.

[0062] The counterweight 6 is made of metal or other materials with high density. It is located at the bottom of the submersible tube 1 and fixed to the inner wall of the submersible tube 1. It is used to adjust the total weight of the submersible tube 1 so that the total buoyancy of the submersible tube 1 is only slightly greater than the total weight; maintain the vertical balance of the submersible tube 1 and increase the restoring force.

[0063] The vertical DC motor 2 is used to convert the vertical component of the motion of the sea surface wave water particles into electrical energy, and the horizontal DC motor 3 is used to convert the horizontal component of the motion of the sea surface wave water particles into electrical energy.

[0064] The motor fixing rod 7 is provided with two groups of motor fixing rods in the horizontal and vertical directions. One end of the motor fixing rod 7 is fixed to the inner wall of the submersible tube 1, and the other end of the motor fixing rod 7 is fixedly connected to the stator 21 of the vertical DC motor or the stator 31 of the horizontal DC motor; the mover 22 of the vertical DC motor is connected to the mover 32 of the horizontal DC motor and the straight rod 5 by bolts and nuts. The mover can rotate around the bolt to ensure that the mover performs smooth linear motion on the motor stator track. The mover of the DC motor needs to adjust the relative position of the mover on the straight rod according to the long and short axis parameters of the elliptical motion trajectory of the sea surface water particle.

[0065] The lead ball 4 is made of high-density metal or other materials and is fixedly connected to one end of the straight rod 5, with the lead ball 4 suspended in the air. Utilizing the principle of inertia, which states that objects with greater mass have greater inertia, the lead ball 4, when inertially moving, pushes on the straight rod 5, transferring this inertia to the mover. As the submerged tube 1 makes elliptical motion with the waves, the lead ball 4, the submerged tube 1, and the stator generate relative motion, which in turn generates relative motion between the stator and the mover, generating current. The current generated by the vertical DC motor 2 and the horizontal DC motor 3 is output to the inner wall of the submerged tube 1 via wires inside the motor fixing rod 7. The wires from the two DC motors then transmit the current to the outside through a sealed aperture in the submerged tube 1.

[0066] The straight rod 5 and motor fixing rod 7 are rigid bodies made of metal materials, requiring a low deformation coefficient. The motor fixing rod 7 can also be a rod integrally cast from the same material as the wall of the submerged tube 1. The motor fixing rod 7 contains wires that output the current generated by the motor to the outside of the submerged tube 1.

[0067] The working mode of the present invention is as follows:

[0068] 1. Collect or observe wave, tide level and water depth data at the project site to understand the wave characteristics at the project site;

[0069] 2. Determine the power of the DC motor and the number of submersible tubes based on wave characteristics and installed capacity plan;

[0070] 3. Install the DC motor on land, seal and lock the submersible tube, and use a boat to tow it to the project site for deployment;

[0071] 4. A single submersible can be fixed with sinkers on the seabed; if there are multiple submersibles, consider building fixed cement piles on the seabed to fix the submersibles.

[0072] The principles of the present invention are as follows:

[0073] In the case of limited water depth, under the action of waves, water particles do not move back and forth in a straight line from wave crest to wave trough, but make elliptical motion. The major and minor semi-axes of the elliptical motion of water particles near the water surface line are the longest, that is, the wave height is the length of its minor axis. The energy in the major axis direction is ignored by most inventions. The present invention controls the submersible tube to make elliptical motion near the water surface line by mooring with cables and counterweights. Figure 1 The vertical position diagram of the submerged tube captures wave energy in both vertical and horizontal directions.

[0074] Inside the submersible, the elliptical motion of the water particles is decomposed into two directions, vertical and horizontal, and mechanical energy is fully converted through two DC motors. The motor stator is fixed to the submersible 1 in the vertical and horizontal directions via motor fixing rods 7, while the lead ball 4 is suspended in the air and connected to the motor mover via a straight rod 5. The motor mover is mounted on the straight rod 5 and can rotate around the normal of the motion plane of the straight rod 5. When the submersible 1 performs elliptical motion with the waves, the lead ball 4 remains in place due to inertia, thereby driving the relative motion of the mover and stator of the DC motor, generating electricity. If the observation point is placed outside the submersible 1 (a fixed point at sea or on a ship), the submersible 1 will perform elliptical motion with the waves, carrying the motor stator in elliptical motion around the lead ball 4; if the observation point is placed inside the submersible 1, the lead ball 4 will perform elliptical motion around the center of the circle, driving the motor mover to generate electricity.

[0075] The invention can set the long and short axes based on water depth, wave height, and wave period, localizing parameters to improve conversion efficiency. The submersible's interior is connected to the outside world via a single cable, leaving few moving parts exposed to seawater and unaffected by problems such as seawater corrosion and biofouling. In catastrophic weather, since the submersible is largely submerged, the motors and other equipment inside are less susceptible to damage from high waves.

Claims

1. Submersible DC motor wave energy power generation device, characterized by: It includes a submersible tube and a vertical DC motor, a horizontal DC motor, a lead ball, a straight rod, a counterweight, and a motor fixing rod located inside the submersible tube; The submerged tube is located near the sea surface and is used to provide buoyancy for the power generation device; the counterweight is located at the bottom of the submerged tube and is used to adjust the total weight of the submerged tube so that the total buoyancy of the submerged tube is only slightly greater than the total weight; the submerged tube is made of high-strength non-metallic material; The vertical DC motor is used to convert the vertical component of the motion of the sea surface wave water particle into electrical energy, and the horizontal DC motor is used to convert the horizontal component of the motion of the sea surface wave water particle into electrical energy; the motor fixing rod is provided with two sets of motor fixing rods in the horizontal and vertical directions, one end of the motor fixing rod is fixed to the inner wall of the submerged tube, and the other end of the motor fixing rod is fixedly connected to the stator of the vertical DC motor or the stator of the horizontal DC motor; the mover of the vertical DC motor is connected to the mover of the horizontal DC motor and the straight rod by bolts and nuts, the mover can rotate around the bolt, and the relative position of the mover on the straight rod is adjusted according to the major and minor axis parameters of the elliptical motion trajectory of the sea surface water particle; The lead ball is fixedly connected to one end of the straight rod and is suspended in the air. When the lead ball performs inertial motion, it pushes the straight rod to transfer inertia to the mover. When the submerged tube performs elliptical motion with the waves, the lead ball, the submerged tube and the stator generate relative motion, thereby causing the stator and the mover to generate relative motion, generating current. The current generated by the vertical DC motor and the horizontal DC motor is output to the inner wall of the submersible barrel through the wires inside the motor fixing rod. The wires of the two motors transmit the current to the outside through the sealed holes of the submersible barrel. The straight rod is a rigid body made of metal material.

2. The submersible DC motor wave energy power generation device according to claim 1, characterized in that: The submerged tube is fixed by a cable or an anchor chain.

3. The submersible DC motor wave energy power generation device according to claim 1, characterized in that: Multiple submersible tubes are connected in series and fixed by cables or anchor chains.

4. The submersible DC motor wave energy power generation device according to claim 2 or 3, characterized in that: The electric current output by the submersible is transmitted to the land through electric wires along cables or anchor chains.

5. The submersible DC motor wave energy power generation device according to claim 1, characterized in that: The material of the submerged tube is plastic or PVC.

6. The submersible DC motor wave energy power generation device according to claim 1, characterized in that: The motor fixing rod is a rigid body made of metal material.

7. The submersible DC motor wave energy power generation device according to claim 1, characterized in that: The motor fixing rod is a rod formed by integrally casting the same material as the submerged cylinder wall.

Images