CN105649850B - Unilateral semi-shielding type bidirectional tidal current energy power generation device - Google Patents
Unilateral semi-shielding type bidirectional tidal current energy power generation device Download PDFInfo
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- CN105649850B CN105649850B CN201510968874.0A CN201510968874A CN105649850B CN 105649850 B CN105649850 B CN 105649850B CN 201510968874 A CN201510968874 A CN 201510968874A CN 105649850 B CN105649850 B CN 105649850B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/16—Stators
- F03B3/18—Stator blades; Guide conduits or vanes, e.g. adjustable
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
- F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
- F03B13/26—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using tide energy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/12—Blades; Blade-carrying rotors
- F03B3/121—Blades, their form or construction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/20—Rotors
- F05B2240/202—Rotors with adjustable area of intercepted fluid
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Oceanography (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
The invention provides a unilateral semi-shielding type bidirectional tidal current energy power generation device which comprises a unilateral semi-shielding device with adjustable weight and a vertical shaft water turbine with a plurality of self-adaptive flat flap type combined blades capable of utilizing bidirectional tidal current speed. Unilateral half shields device includes water conservancy diversion portion and impeller cooperation portion, and half shields the device for inside is the cavity formula body structure of cavity, respectively has two open closed sealed holes about it, can pour into the ballast water or discharge the ballast water through pouring into compressed air and make whole power generation facility dive to the bottom or float to the surface of water and overhaul. The projection of impeller cooperation portion on the horizontal plane is the semicircle of inside concave yield, and the projection of water conservancy diversion portion on the horizontal plane is the curve of inside concave yield, and water conservancy diversion portion symmetry sets up the both sides of impeller cooperation portion and is connected with impeller cooperation portion. The tidal current energy generating set can be determined according to the depth of a water area, so that the tidal current energy generating set can effectively utilize tidal current energy in a large water depth range, and the utilization rate of the tidal current energy is high.
Description
Technical Field
The invention relates to the technical field of tidal current energy power generation devices, in particular to a unilateral semi-shielding device and a tidal current energy power generation device applying the same.
Background
The ocean is considered the last treasury of resources on the earth, also known as the sea of energy. In the 21 st century, the oceans will play an important role in providing living space, food, minerals, energy and water resources for human beings. The ocean energy is used as a clean and renewable energy source, has little influence on the environment, does not occupy land resources, is rich in global ocean renewable energy sources, and has very considerable development prospect.
Tidal current energy resources are important supplements of future energy, and are particularly significant in solving the problem of energy supply of islands. The conventional tidal current energy power generation device has low energy obtaining efficiency, and the vertical shaft power generation device has the advantages that power can be generated when the tidal current directions are opposite, so that certain advantages are achieved. The semi-shielding vertical axis tidal current energy power generation device in the project can effectively improve the efficiency of the tidal current energy power generation device, improve the utilization rate of tidal current energy and promote the development and utilization of new energy of tidal current energy.
Chinese patent document (published: 1/29/2014, patent number ZL201120342709.0) discloses a tidal current energy power generation device, which belongs to the field of renewable resource power generation devices and comprises a base, an adjusting bolt, a flow guide cover and a generator base, the rotating shaft is a steel structure which is sealed all around and has a through center, the guide cover is designed into a flaring structure with two large ends and a small middle part, bases with adjusting bolts are welded at the bottoms of the two ends of the guide cover, the rotating shaft is arranged in the vertical direction in the middle of the guide cover, the speed increaser and the generator are sequentially arranged at the upper end of the rotating shaft, the generator is arranged on a generator base, the blades are arranged in the circumferential direction of the rotating shaft, guide vanes are arranged at the inlet and the outlet of the guide cover, the guide vanes are clamped between an upper plate and a lower plate of the guide cover, the rotating shaft transmits kinetic energy to the generator after passing through the speed increaser.
The technical scheme has the following defects: the device has no structure for providing buoyancy, can not work in a deep water channel, has no energy storage structure, and can not provide stable and continuous electric energy. The device only adopts a common flap type vertical axis water turbine, and has low utilization rate of water flow energy.
Disclosure of Invention
The invention aims to provide a unilateral semi-shielding device and a tidal current energy power generation device using the same, wherein the power generation device can be operated in a deep water channel, provides stable and continuous electric energy and has higher utilization rate of tidal current energy.
The technical problem can be solved by the following technical means: a unilateral semi-shielding device comprises a flow guide part and an impeller matching part, wherein the unilateral semi-shielding device is a cavity type floating body structure with a cavity inside and comprises an upper surface, a lower surface and a side surface which is perpendicular to a horizontal plane, and the upper surface and the lower surface of the unilateral semi-shielding device are both plane structures which are parallel to the horizontal plane; the side of the semi-shielding device is provided with two walls, wherein one wall is a curved wall comprising a flow guide part and an impeller matching part, the projection of the impeller matching part on the horizontal plane is a semicircular arc concave inwards, the projection of the flow guide part on the horizontal plane is a curve concave inwards, the flow guide parts are symmetrically arranged on two sides of the impeller matching part and are connected with the impeller matching part, and one wall opposite to the curved wall is a plane wall which is projected on the horizontal plane as a straight line. The curved wall is directly connected with the planar wall. By adopting the cavity type floating body structure, the deepwater channel operation can be realized, and the tidal current energy of a deepwater area is fully utilized. When the tidal current flow guide device is installed, the plane wall is installed in parallel to the tidal current flow direction, when the tidal current flows through the flow guide part, the tidal current turns under the guide effect of the flow guide part to intensively impact the impeller, so that the impeller rotates, and the utilization efficiency of tidal current energy can be improved. In order to freely adjust the buoyancy of the semi-shielding device so as to be stably installed in any water depth and float out of the water surface when maintenance is needed, two openable and closable water-tight holes are respectively arranged at the upper part and the lower part of the unilateral semi-shielding device, and ballast water and compressed air can be injected to adjust the buoyancy of the device in water.
The tidal current energy power generation device comprises the single-side half shielding device, a base, a flap type vertical axis water turbine installed on the base and a power generation device, wherein the outer diameter of the flap type vertical axis water turbine is smaller than the inner diameter of an impeller matching part on the single-side half shielding device, the single-side half shielding device is installed on the base, the impeller matching part of the single-side half shielding device is coaxially installed with the flap type vertical axis water turbine, a rotating shaft of the flap type vertical axis water turbine is connected with the power generation device, the power generation device is connected with an energy storage device, and the power generation device and the energy storage device are both connected with wires or cables. The energy storage device can store electric energy when the tidal current energy density is sufficient, and supply power when the tidal current energy is insufficient, so that the stability and continuity of power supply are ensured. When the flow direction of the tide of a common vertical axis water turbine is perpendicular to the axial direction of the water turbine, the rotation direction of the blades of the water turbine has half time opposite to the incoming flow direction, and the incoming flow hinders the rotation of the water turbine instead. If the hydraulic turbine design operating mode is clockwise rotation, when the hydraulic turbine blade turned to the left side, the direction of rotation will be in the trend flow direction reversal, hinders the rotation of hydraulic turbine, reduces its capacitation efficiency. Wherein the base is preferably designed into a hollow box structure, and the base is provided with a water injection hole and a locking device for locking the base on the seabed base. The staff can pour into the ballast water into in order to adjust the buoyancy that the base received in aqueous through the water filling hole, and the base can be connected with seabed base through locking device, can open locking device when needs maintenance, removes this connection, pours into compressed air simultaneously and discharges the ballast water to the device floats.
When the device is used, the tide is guided by the semi-shielding device, the flowing direction of the tide is changed, more water flow vertically impacts the blades of the water turbine, and the water flow direction is not opposite to the rotating direction of the blades of the water turbine.
The flap type vertical axis water turbine is fixed on the base, and one side of the water turbine is semi-shielded on the single side. The arrangement can lead the tidal current to be guided to the blades of the water turbine, so that the tidal current energy utilization rate is higher, and a better power generation effect is obtained. The flap type combined blade can effectively improve the energy obtaining efficiency by adjusting the included angle between the flap blade and the main blade, and can fully utilize the tidal current energy with the flow direction opposite to the original flow direction by turning the flap blade to the position symmetrical to the original position. Correspondingly, the power generation device is connected with a rotating shaft of the flap type vertical axis water turbine, and the energy storage device is connected with the power generation device.
The unilateral semi-shielding device is provided with a pair of hooks for hoisting. The hook is convenient to move the power generation device, so that the power generation device is lifted away by using the lifting equipment.
The flap type vertical axis water turbine is composed of a hub and blades arranged at the periphery of the hub at equal intervals, wherein the tips of the blades are provided with flaps, the center of the hub is fixedly provided with a rotating shaft of the flap type vertical axis water turbine, the number of the blades is preferably 3-6, and the highest energy obtaining efficiency can be ensured by a proper number of water turbine blades.
An adjustable included angle is formed between the blade flap and the blade main body, the flap adopts a gear type flap rudder transmission method, and the height of the long side of the blade main body is 4-6 times of that of the short side of the blade main body. Therefore, the impact of water flow on the water turbine can be effectively improved, and the tidal current utilization rate is improved.
The power generation device comprises a gearbox and a generator, wherein an input shaft of the gearbox is connected with a rotating shaft of the flap type vertical axis water turbine through a coupler, and an output shaft of the gearbox is connected with the rotating shaft of the generator; the energy storage device is a storage battery. The gearbox can adopt a gear gearbox and also can adopt a hydraulic gearbox.
In addition, the upper end of the semi-shielding device is provided with a plurality of rust-proof anchor chains, one end of each rust-proof anchor chain is connected with the semi-shielding device through a locking device, and the other end of each rust-proof anchor chain is fixed on the sea bottom, so that the whole device is prevented from being flushed by water flows in different directions. The locking device connecting the anchor chain and the air guide sleeve can be unlocked when needed, so that the device can float to the water surface for maintenance. The number of the rust-preventive anchor chains is preferably 4.
The invention has the advantages that: compared with the prior art, the semi-shielding device adopts a cavity type structure, has buoyancy, can be arranged and operated in a deepwater channel, and the buoyancy can be freely adjusted; in addition, when the device is used, the flow direction of the tide is changed under the action of the semi-shielding device, more water flow vertically impacts the blades of the water turbine, and the direction of the water flow is not opposite to the rotating direction of the blades of the water turbine; the flap type water turbine blade can change an included angle with the main blade along with the reserved direction and flow velocity, so that the energy obtaining efficiency is improved; the device has simple profile, is convenient to manufacture on one hand, and on the other hand, the two opposite half shielding devices can generate mutual beneficial effects to further enhance the energy obtaining efficiency of the water turbine; the energy storage device can store electric energy when the generating capacity is strong, and supplement output electric energy when the generating capacity is weak, so that the electric energy output stability of the whole generator is ensured.
Drawings
FIG. 1 is a perspective view of a single-sided semi-shading arrangement;
FIG. 2 is a top view of a single sided semi-shielding device;
FIG. 3 is a schematic structural diagram of a tidal current energy power generation device of a single-side semi-shielding device;
FIG. 4 is a top view of FIG. 3 (leaving only the half-masking device and impeller);
fig. 5 is a schematic structural view (plan view) of a flap-type vertical axis water turbine.
Detailed Description
The single-side semi-shielding device 1 shown in fig. 1 and 2 comprises a flow guide part 111 and an impeller matching part 112, the single-side semi-shielding device is a hollow cavity floating body structure with a hollow cavity inside, two openings 15 are respectively formed in the upper part and the lower part of the single-side semi-shielding device, ballast water can be filled into the ballast water adjusting device through the openings 15, the single-side semi-shielding device 1 comprises an upper surface, a lower surface and a side surface, the side surface is perpendicular to a horizontal plane, the upper surface and the lower surface of the semi-shielding device 1 are both plane structures parallel to the horizontal plane, and the upper opening 15 and the lower opening 15 are respectively; the side of the semi-shielding device 1 has two walls, one of the walls is a curved wall including a flow guiding portion and an impeller matching portion, the projection of the impeller matching portion 112 on the horizontal plane is a semicircular arc recessed inwards, the projection of the flow guiding portion 111 on the horizontal plane is a curve recessed inwards, the flow guiding portions are symmetrically arranged on two sides of the impeller matching portion and connected with the impeller matching portion, and one wall opposite to the curved wall 11 is a plane wall 12 projected on the horizontal plane as a straight line. The above design can achieve an ideal diversion effect, and experiments prove that the diversion part 11 with any curvature can achieve the purpose of the invention, but if a more diversion effect is desired, the specific curvature of the diversion part 111 can be calculated according to the tidal current density, intensity and flow direction of a work site arranged as required, and workers in the field can calculate according to data collected on site, so that the embodiments are various, and are not described herein again.
The single-side semi-shielding device can be assembled into a tidal current energy power generation device shown in fig. 3 and 4, and the tidal current energy power generation device comprises the single-side semi-shielding device 1, a base 2, a flap-type vertical shaft water turbine 3 arranged on the base 2, a gearbox 4 and a generator 5 serving as power generation devices, and a storage battery 6 serving as an energy storage structure. The outer diameter of the flap type vertical axis water turbine 3 is smaller than the inner diameter of the impeller matching part 112 on the unilateral semi-shielding device 1, as shown in fig. 5, the flap type vertical axis water turbine 3 is composed of a hub 31 and blades 32 arranged at the periphery of the hub at equal intervals, a rotating shaft of the flap type vertical axis water turbine 3 is fixed at the center of the hub 31, the number of the blades 32 is 5, the blades 32 are of a flat plate structure, reinforcing ribs are arranged on the blades, a flap 321 which forms an adjustable angle with a blade main body is arranged at the tip of each blade 32, the flap is driven by adopting the principle similar to a gear type flap rudder, and the height of the long edge of the flap is 6 times of that. Four rust-proof anchor chains 7 are arranged at the upper end of the semi-shielding device, one end of each rust-proof anchor chain is connected with the semi-shielding device through a locking device 8, and the other end of each rust-proof anchor chain is fixed on the seabed.
The axis of the impeller fitting portion 112 of the single-side half-shielding device 1 coincides with the axis of the flap-type vertical axis water turbine 3. The height difference from the lower surface of the single-side semi-shielding device 1 to the lower surface of the flap type vertical axis water turbine 3 is 0.5m, namely the lower surface of the single-side semi-shielding device 1 is 0.5m lower than the lower surface of the flap type vertical axis water turbine.
The generator 5 is connected with the storage battery 6 through a cable, and both the generator 5 and the storage battery 6 are connected with wires or cables for connecting external equipment.
The above embodiments are provided for understanding the present invention, and are not intended to limit the present invention, and those skilled in the relevant art can make various changes or modifications based on the technical solutions described in the claims, for example, the blade of the present invention can be 3, 4 or 6; the flap portion of the blade tip may also be 5 or 4 times as long as the width; the gearbox can adopt a gear gearbox and also can adopt a hydraulic gearbox. And the like, which should be understood to still fall within the scope of the present invention.
Claims (7)
1. The utility model provides a trend can power generation facility, includes the base, installs flap type vertical axis hydraulic turbine, power generation facility and energy memory on the base, and flap type vertical axis hydraulic turbine's pivot is connected with power generation facility, its characterized in that: the tidal current energy power generation device further comprises a unilateral semi-shielding device, wherein the unilateral semi-shielding device is a cavity type floating body structure with a cavity inside and comprises an upper surface, a lower surface and a side surface perpendicular to the horizontal plane, the upper surface and the lower surface of the unilateral semi-shielding device are both planar structures parallel to the horizontal plane and are respectively provided with 2 openable and closable sealing holes, and ballast water and compressed air can be injected to adjust the buoyancy of the device; the unilateral semi-shielding device is characterized in that two walls are arranged on the side surface of the unilateral semi-shielding device, one wall is a curved wall comprising a flow guide part and an impeller matching part, the projection of the impeller matching part on the horizontal plane is an inward concave semi-arc which can cover and shield a semi-lateral impeller of the water turbine from tidal current impact to generate reverse rotating moment, the projection of the flow guide part on the horizontal plane is an inward concave curve, the flow guide parts are symmetrically arranged on two sides of the impeller matching part and are connected with the impeller matching part and can converge the tidal current in two forward and reverse flow directions, one wall opposite to the curved wall is a planar wall which is projected on the horizontal plane as a straight line, and the curved wall is directly connected with the planar wall;
the flap type vertical axis water turbine consists of a hub and blades which are arranged at the periphery of the hub at equal intervals, wherein a rotating shaft of the flap type vertical axis water turbine is fixed at the center of the hub, the blades are of a flat plate structure, reinforcing ribs are arranged on the blades, flaps which form an adjustable angle with a blade main body are arranged at blade tips of the blades, and the flaps are driven by adopting the principle of a gear type flap rudder;
the outer diameter of the flap type vertical axis water turbine is smaller than the inner diameter of an impeller matching part on a single-side semi-shielding device, the single-side semi-shielding device is installed on the base, the impeller matching part of the single-side semi-shielding device is coaxially installed with the flap type vertical axis water turbine, the power generation device and the energy storage device are connected with a rotating shaft of the flap type vertical axis water turbine, the power generation device is connected with the energy storage device, and the power generation device and the energy storage device are both connected with wires or cables.
2. The tidal current energy power generation device according to claim 1, wherein: the base is a hollow box structure, and the base is provided with a water injection hole and a locking device for locking the base on the seabed base.
3. The tidal current energy power generation device according to claim 1, wherein: the number of the paddles is 3 to 6.
4. The tidal current energy power generation device of claim 3, wherein: the height of the long side of the blade body is 4-6 times of the short side of the blade body.
5. The tidal current energy power generation device according to any one of claims 1 to 3, wherein: the power generation device comprises a gearbox and a generator, wherein an input shaft of the gearbox is connected with a rotating shaft of the flap type vertical axis water turbine through a coupler, and an output shaft of the gearbox is connected with the rotating shaft of the generator; the energy storage device is a storage battery.
6. The tidal current energy power generation device of claim 5, wherein: the upper end of the unilateral semi-shielding device is provided with a plurality of antirust anchor chains, one end of each antirust anchor chain is connected with the unilateral semi-shielding device through a locking device, and the other end of each antirust anchor chain is fixed on the sea bottom.
7. The tidal current energy power generation device of claim 6, wherein: the number of the rust-proof anchor chains is 4.
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| CN201510968874.0A CN105649850B (en) | 2015-12-21 | 2015-12-21 | Unilateral semi-shielding type bidirectional tidal current energy power generation device |
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| CN106545454A (en) * | 2016-10-20 | 2017-03-29 | 天津大学 | A kind of portable folding blade tidal current energy generating equipment |
| CN110397544A (en) * | 2018-04-24 | 2019-11-01 | 上海广谋能源技术开发有限公司 | A kind of flowing water power generation device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57137652A (en) * | 1981-02-18 | 1982-08-25 | Kubota Ltd | Hydraulic turbine equipment |
| CN202690315U (en) * | 2012-06-04 | 2013-01-23 | 关涛 | Wave energy conversion device |
| KR101296759B1 (en) * | 2013-01-07 | 2013-08-14 | 정주원 | Generation device using velocity of flow |
| CN103256170A (en) * | 2013-05-09 | 2013-08-21 | 哈尔滨工程大学 | Floating-barrel type tidal current energy generating device |
| CN104477366A (en) * | 2014-12-09 | 2015-04-01 | 黎家齐 | Flexible flapped rudder and transmission mechanism thereof |
| WO2015190916A1 (en) * | 2014-06-10 | 2015-12-17 | Ventus Nautilus Holding B.V. | Device for converting kinetic energy of a flowing medium to electrical energy |
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2015
- 2015-12-21 CN CN201510968874.0A patent/CN105649850B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57137652A (en) * | 1981-02-18 | 1982-08-25 | Kubota Ltd | Hydraulic turbine equipment |
| CN202690315U (en) * | 2012-06-04 | 2013-01-23 | 关涛 | Wave energy conversion device |
| KR101296759B1 (en) * | 2013-01-07 | 2013-08-14 | 정주원 | Generation device using velocity of flow |
| CN103256170A (en) * | 2013-05-09 | 2013-08-21 | 哈尔滨工程大学 | Floating-barrel type tidal current energy generating device |
| WO2015190916A1 (en) * | 2014-06-10 | 2015-12-17 | Ventus Nautilus Holding B.V. | Device for converting kinetic energy of a flowing medium to electrical energy |
| CN104477366A (en) * | 2014-12-09 | 2015-04-01 | 黎家齐 | Flexible flapped rudder and transmission mechanism thereof |
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