CN110344995A - A kind of novel float type wave power generation device - Google Patents
A kind of novel float type wave power generation device Download PDFInfo
- Publication number
- CN110344995A CN110344995A CN201910730761.5A CN201910730761A CN110344995A CN 110344995 A CN110344995 A CN 110344995A CN 201910730761 A CN201910730761 A CN 201910730761A CN 110344995 A CN110344995 A CN 110344995A
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- power generation
- watertight case
- connecting rod
- generator
- float
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- 238000010248 power generation Methods 0.000 title claims abstract description 47
- 230000007246 mechanism Effects 0.000 claims abstract description 42
- 230000005540 biological transmission Effects 0.000 claims abstract description 21
- 230000005611 electricity Effects 0.000 claims abstract description 6
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 15
- 241001481828 Glyptocephalus cynoglossus Species 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 2
- 230000033001 locomotion Effects 0.000 description 13
- 238000010586 diagram Methods 0.000 description 4
- 235000014676 Phragmites communis Nutrition 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
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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
- F03B13/14—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 wave energy
- F03B13/16—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 wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem"
- F03B13/18—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 wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore
- F03B13/1845—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 wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom slides relative to the rem
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/32—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from a charging set comprising a non-electric prime mover rotating at constant speed
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
The invention discloses a kind of novel float type wave power generation devices, including float, connecting rod, upper watertight case, lower watertight case, transmission mechanism and power generation mechanism, the upper watertight case is fixedly connected with lower watertight case, the small end is connect with float, lower end is rotatably deep into space in lower watertight case from upper watertight box top middle position, transmission mechanism and power generation mechanism are set in the lower watertight case, the connecting rod is connect by transmission mechanism with power generation mechanism, connecting rod is driven by float, connecting rod drives power generation mechanism to generate electricity by transmission mechanism.The present invention alternates the form of power generation by using two generators of rack drives, to achieve the purpose that maximally utilise wave energy, greatly increases the efficiency of power generation, and provide selectable diversity for the development and utilization of wave energy.
Description
Technical field
The present invention relates to wave-activated power generation technical field, specially a kind of novel float type wave power generation device.
Background technique
Ocean occupies the 71% of earth surface product, contains the huge renewable energy of reserves, wave energy is as sustainable
The green energy resource utilized, and energy density with higher.As the non-renewable energy resources such as fossil energy increasingly fall sharply, wave energy
Development and utilization have become the hot spot that new energy development utilizes.Although there are many successful wave energy generating sets in market instantly
Example, but the still generally existing shortcoming of device, if generation mode is more single, generating efficiency is generally more low, so that wave
The utilization rate of unrestrained energy is lower.
So can be good at solving problem above we have proposed a kind of novel float type wave power generation device.
Summary of the invention
The invention reside in a kind of novel float type wave power generation device is provided, by using two generator phases of rack drives
Mutually alternately the form of power generation greatly increases the efficiency of power generation to achieve the purpose that maximally utilise wave energy, and is
The development and utilization of wave energy provide selectable diversity.
To achieve the above object, present invention employs following technical solutions:
A kind of novel float type wave power generation device, including float, connecting rod, upper watertight case, lower watertight case, transmission mechanism and
Power generation mechanism, the upper watertight case are fixedly connected with lower watertight case, and the small end is connect with float, and lower end is from Shang Shui
Close box top middle position is rotatably deep into space in lower watertight case, sets transmission mechanism and power generation in the lower watertight case
Mechanism, the connecting rod are connect by transmission mechanism with power generation mechanism, drive connecting rod by float, connecting rod is driven by transmission mechanism
Power generation mechanism power generation.
The transmission mechanism, including rack gear, the first single speed flywheel and the second single speed flywheel, the rack gear are vertically affixed
In the lower end of connecting rod, the two sides of rack gear are evenly equipped with straight-tooth respectively, on the straight-tooth of rack gear two sides respectively with the first single speed flywheel and
Straight-tooth on second single speed flywheel is meshed.
The power generation mechanism, including the first gearbox, the second gearbox, the first power input axis, the second power input
Axis, the first generator, the second generator, the first battery, the second battery, the first current output line and the output of the second electric current
Line, first gearbox are connected by the first power input axis with the first single speed flywheel, first gearbox
It crosses motor input shaft to be connected with the first generator, the first generator is connected by electric wire with the first battery, the first electric power storage
Pond is connected with the first current output line, second gearbox, the second power input axis, the second generator, the second electric power storage
The composed structure and catenation principle of pond and the second current output line generate electricity with the first gearbox, the first power input axis, first
Machine, the composed structure of the first battery and the first current output line and catenation principle are identical.
The inside of the first single speed flywheel and the second single speed flywheel is using ratchet mechanism.
First gearbox, the first generator and first battery is installed on the first pedestal, and the first pedestal is logical
The inner bottom wall for crossing the first pillar and lower watertight case is affixed, and second gearbox, the second generator and the second battery are pacified
On the second pedestal, the second pedestal is affixed by the inner bottom wall of the second pillar and lower watertight case.
The outer bottom side of the lower watertight case is connected with foundation.
The upper watertight case and lower watertight case are cylindric body structure, the upper watertight box top middle position
Equipped with upper waterproof axle sleeve, bottom middle position is equipped with lower waterproof axle sleeve, and the movable property of connecting rod is threaded through waterproof axle sleeve and lower anti-
In water axle sleeve.
The float is hollow round-like structure, and the top side middle position of the float is embedded with witch ball, edge
The periphery of float is equipped with circular taperedchromeplatedbezel.
The connecting rod is equipped with upper limit ring and lower limit ring, and upper limit ring is located inside upper watertight case, lower limit ring
Inside lower watertight case.
The beneficial effects of the present invention are:
(1) structure novel, it is easy to assembly, it being capable of hanging down above and below a variety of waters are done using powered by wave energy connecting rod and rack gear
Swing movement, drive single speed flywheel single direction rotation and then promote electrical power generators, be conducive to improve the development and utilization to wave energy with
And reinforcement is to the structural defence of the present apparatus.
(2) energy transmission class is few, and transmission efficiency is high, and alternates power generation by two motors, can reach most
Wave energy is utilized to big degree, generated energy is increased, improves generating efficiency.
Detailed description of the invention
Fig. 1 is diagrammatic cross-section of the invention；
Fig. 2 is operation schematic diagram of the invention；
Fig. 3 is power generation mechanism structural schematic diagram of the invention；
Fig. 4 is the combining structure schematic diagram of the first single speed flywheel of the invention, the winged wheel and rack of the second single speed；
Fig. 5 is schematic view of the front view of the invention；
Fig. 6 is Floater Structure schematic diagram of the invention.
In figure: 1 float, 2 connecting rods, watertight case, 4 lower watertight casees, 5 rack gears, 6 first single speed flywheels, 7 second single speeds fly on 3
Wheel, 8 first gearboxes, 9 second gearboxes, 10 first power input axis, 11 second power input axis, 12 first generators, 13
Second generator, 14 first batteries, 15 second batteries, 16 first current output lines, 17 second current output lines, 18 first
It is pedestal, 19 second pedestals, 20 first pillars, 21 second pillars, 22 upper limit rings, 23 lower limit rings, 24 witch balls, 25 reflective
It encloses, waterproof axle sleeve, 27 lower waterproof axle sleeves, 28 foundation on 26.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1-6 is please referred to, the present invention provides a kind of technical solution: a kind of novel float type wave power generation device, including it is floating
Son 1, connecting rod 2, upper watertight case 3, lower watertight case 4, transmission mechanism and power generation mechanism, the upper watertight case 3 and lower watertight case 4 are solid
Fixed connection, 2 upper end of connecting rod are connect with float 1, and lower end is rotatably deep into down from upper 3 top center position of watertight case
Space in watertight case 4, sets transmission mechanism and power generation mechanism in the lower watertight case 4, the connecting rod 2 by transmission mechanism with
Power generation mechanism connection drives connecting rod 2 by float 1, and connecting rod 2 drives power generation mechanism to generate electricity by transmission mechanism.
The transmission mechanism, including rack gear 5, the first single speed flywheel 6 and the second single speed flywheel 7, the rack gear 5 are vertical
It is fixed in the lower end of connecting rod 2, the two sides of rack gear 5 are evenly equipped with straight-tooth respectively, single with first respectively on the straight-tooth of 5 two sides of rack gear
Straight-tooth on fast flywheel 6 and the second single speed flywheel 7 is meshed.
The power generation mechanism, including the first gearbox 8, the second gearbox 9, the first power input axis 10, the second power
Input shaft 11, the first generator 12, the second generator 13, the first battery 14, the second battery 15, the first current output line 16
And second current output line 17, first gearbox 8 are connected by the first power input axis 10 with the first single speed flywheel 6
Connect, first gearbox 8 is connected by motor input shaft with the first generator 12, the first generator 12 by electric wire and
First battery 14 is connected, and the first battery 14 is connected with the first current output line 16, second gearbox 9,
The composed structure and connection of second power input axis 11, the second generator 13, the second battery 15 and the second current output line 17
Principle is exported with the first gearbox 8, the first power input axis 10, the first generator 12, the first battery 14 and the first electric current
The composed structure and catenation principle of line 16 are identical.
The inside of the first single speed flywheel 6 and the second single speed flywheel 7 is using ratchet mechanism, which is
The common knowledge of this field, principle are identical as the principle of sprocket wheel on the hind axle of automatic vehicle；First single speed of the invention flies
The inside of wheel 6, which can be, controls reed equipped with an one-directional rotation, and when the first single speed flywheel 6 is rotated to a direction, reed is made
Bounce motion, the first power input axis 10 are separated with the first single speed flywheel 6, and the first single speed flywheel 6 can rotate, and the first power
Input shaft 10 does not rotate；When the first single speed flywheel 6 rotates round about, reed does not make bounce motion, the first power input
Axis 10 closes up with single speed flywheel, and the first power input axis 10 rotates with it, and that is to say that the first power input axis 10 can only be to phase
Anti- direction rotation, the structural principle of the second single speed flywheel 7 are identical as the structural principle of the first single speed flywheel 6.
First gearbox 8, the first generator 12 and first battery 14 is installed on the first pedestal 18, the
One pedestal 18 is affixed by the inner bottom wall of the first pillar 20 and lower watertight case 4, second gearbox 9, the second generator 13
And second battery 15 be installed on the second pedestal 19, the interior bottom that the second pedestal 19 passes through the second pillar 21 and lower watertight case 4
Wall is affixed.
The outer bottom side of the lower watertight case 4 is connected with foundation 28, is fixed for squeezing into sea bed.
The upper watertight case 3 and lower watertight case 4 are cylindric body structure, upper 3 top center of watertight case
Position is equipped with upper waterproof axle sleeve 26, and bottom middle position is equipped with lower waterproof axle sleeve 27, and the movable property of connecting rod 2 is threaded through waterproof
In axle sleeve 26 and lower waterproof axle sleeve 27, pass through the upper waterproof axle sleeve 26 and lower waterproof in connecting rod 2 and the setting of upper 3 joint of watertight case
Axle sleeve 27 can play dual waterproof action, it is entirely avoided water enters in lower watertight case 4 from 2 position of connecting rod, sufficiently protects
The normal operation of transmission mechanism and power generation mechanism is demonstrate,proved.
The float 1 is hollow round-like structure, and the top side middle position of the float 1 is embedded with witch ball
24, it is equipped with circular taperedchromeplatedbezel 25 along the periphery of float 1, witch ball 24 and taperedchromeplatedbezel 25 constitute caution notice, anti-from night
Light action can play a warning role for passing vessel etc..
The connecting rod 2 is equipped with upper limit ring 22 and lower limit ring 23, and upper limit ring 22 is located inside upper watertight case 3,
Lower limit ring 23 is located inside lower watertight case 4, and the upper limit ring 22 and lower limit ring 23 are for limiting the drive connecting rod of float 1
2 with wave heaving when shift motion.
Working principle: the present invention is in use, in the working region on sea, first by the foundation 28 of lower 4 bottom of watertight case
It throws sea bed into fix, is immersed in watertight case 3, lower watertight case 4 and foundation 28 in seawater, upper watertight case 3 passes through connecting rod 2
Float 1 is set to float on the water surface, when float 1 does heaving up and down with wave, the movement straight of float 1 has driven 2 He of connecting rod
The vertical movement of rack gear 5, the vertical movement of rack gear 5 have driven the orientation of the first single speed flywheel 6 and the second single speed flywheel 7 to revolve respectively
Transhipment is dynamic；When rack gear 5 moves upwards, the first single speed flywheel 6 on the left side does directional-rotation movement counterclockwise, and the first single speed flies
The the first power input axis 10 for driving the first gearbox 8 is done synchronized rotary motion in the same direction by wheel 6, through mentioning for the first gearbox 8
The power generation of the first generator 12 is passed to after speed, and the second single speed flywheel 7 on the right then does clockwise directional-rotation movement, without
Dynamic second generator 13 power generation；When rack gear 5 moves downward, the second single speed flywheel 7 does directional-rotation movement counterclockwise, the
The the second power input axis 11 for driving the second gearbox 9 is done synchronized rotary motion in the same direction by two single speed flywheels 7, through the second speed change
The power generation of the second generator 13 is passed to after the speed-raising of case 9, and the first single speed flywheel 6 then does clockwise directional-rotation movement, no
The first generator 12 is driven to generate electricity；The electricity that first generator 12 and the second generator 13 alternates sending stores respectively
In the first battery 14 and the second battery 15, finally divide respectively through the first current output line 16 and the second current output line 17
It is not output to extraneous use.
First battery 14 and the second battery 15 is with biggish voltage output, the direct current warp of output
Inverter is converted to alternating current, and alternating current is converted into voltage rating through transformer again and uses.
The content being not described in detail in this specification belongs to that well known to a person skilled in the art the prior arts.
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art,
It is still possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is carried out etc.
With replacement, all within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in this
Within the protection scope of invention.
Claims (9)
1. a kind of novel float type wave power generation device, it is characterised in that: including float (1), connecting rod (2), upper watertight case (3),
Lower watertight case (4), transmission mechanism and power generation mechanism, the upper watertight case (3) is fixedly connected with lower watertight case (4), described
Connecting rod (2) upper end is connect with float (1), and lower end is rotatably deep into lower watertight case from upper watertight case (3) top center position
(4) interior space, sets transmission mechanism and power generation mechanism in the lower watertight case (4), the connecting rod (2) by transmission mechanism with
Power generation mechanism connection drives connecting rod (2) by float (1), and connecting rod (2) drives power generation mechanism to generate electricity by transmission mechanism.
2. a kind of novel float type wave power generation device according to claim 1, it is characterised in that: the driver
Structure, including rack gear (5), the first single speed flywheel (6) and the second single speed flywheel (7), the rack gear (5) are vertically fixed in connecting rod
(2) lower end, the two sides of rack gear (5) are evenly equipped with straight-tooth respectively, on the straight-tooth of rack gear (5) two sides respectively with the first single speed flywheel
(6) and the straight-tooth on the second single speed flywheel (7) is meshed.
3. a kind of novel float type wave power generation device according to claim 1, it is characterised in that: the generator
Structure, including the first gearbox (8), the second gearbox (9), the first power input axis (10), the second power input axis (11), first
Generator (12), the second generator (13), the first battery (14), the second battery (15), the first current output line (16) and
Second current output line (17), first gearbox (8) pass through the first power input axis (10) and the first single speed flywheel (6)
It is connected, first gearbox (8) is connected by motor input shaft with the first generator (12), the first generator (12)
It is connected by electric wire with the first battery (14), the first battery (14) is connected with the first current output line (16), described
The second gearbox (9), the second power input axis (11), the second generator (13), the second battery (15) and the second electric current it is defeated
The composed structure and catenation principle of outlet (17) with the first gearbox (8), the first power input axis (10), the first generator
(12), the composed structure and catenation principle of the first battery (14) and the first current output line (16) are identical.
4. a kind of novel float type wave power generation device according to claim 2, it is characterised in that: first single speed
The inside of flywheel (6) and the second single speed flywheel (7) is using ratchet mechanism.
5. a kind of novel float type wave power generation device according to claim 3, it is characterised in that: first speed change
Case (8), the first generator (12) and the first battery (14) are installed on the first pedestal (18), and the first pedestal (18) passes through the
One pillar (20) and the inner bottom wall of lower watertight case (4) are affixed, second gearbox (9), the second generator (13) and second
Battery (15) is installed on the second pedestal (19), and the second pedestal (19) passes through the second pillar (21) and lower watertight case (4)
Inner bottom wall is affixed.
6. a kind of novel float type wave power generation device according to claim 1, it is characterised in that: the lower watertight case
(4) outer bottom side is connected with foundation (28).
7. a kind of novel float type wave power generation device according to claim 1, it is characterised in that: the upper watertight case
It (3) is cylindric body structure with lower watertight case (4), upper watertight case (3) the top center position is equipped with upper waterproof axis
Cover (26), bottom middle position be equipped with lower waterproof axle sleeve (27), the movable property of connecting rod (2) be threaded through waterproof axle sleeve (26) and under
In waterproof axle sleeve (27).
8. a kind of novel float type wave power generation device according to claim 1, it is characterised in that: the float (1)
For hollow round-like structure, the top side middle position of the float (1) is embedded with witch ball (24), the week along float (1)
Edge is equipped with circular taperedchromeplatedbezel (25).
9. a kind of novel float type wave power generation device according to claim 1, it is characterised in that: the connecting rod (2)
It is equipped with upper limit ring (22) and lower limit ring (23), upper limit ring (22) is located at upper watertight case (3) inside, lower limit ring (23)
It is internal positioned at lower watertight case (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910730761.5A CN110344995A (en) | 2019-08-08 | 2019-08-08 | A kind of novel float type wave power generation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910730761.5A CN110344995A (en) | 2019-08-08 | 2019-08-08 | A kind of novel float type wave power generation device |
Publications (1)
| Publication Number | Publication Date |
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| CN110344995A true CN110344995A (en) | 2019-10-18 |
Family
ID=68184380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910730761.5A Pending CN110344995A (en) | 2019-08-08 | 2019-08-08 | A kind of novel float type wave power generation device |
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| CN (1) | CN110344995A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110778445A (en) * | 2019-11-07 | 2020-02-11 | 杭州隽珀科技有限公司 | Oscillating floater transmission equipment for realizing double-stroke power generation |
| CN114412689A (en) * | 2021-12-28 | 2022-04-29 | 庄文骏 | Long-rotating-shaft hydroelectric generation system |
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|---|---|---|---|---|
| CN110778445A (en) * | 2019-11-07 | 2020-02-11 | 杭州隽珀科技有限公司 | Oscillating floater transmission equipment for realizing double-stroke power generation |
| CN110778445B (en) * | 2019-11-07 | 2020-11-20 | 温岭市维尔峰机电有限公司 | Oscillating floater transmission equipment for realizing double-stroke power generation |
| CN114412689A (en) * | 2021-12-28 | 2022-04-29 | 庄文骏 | Long-rotating-shaft hydroelectric generation system |
| CN114412689B (en) * | 2021-12-28 | 2024-05-24 | 庄文骏 | Long-rotating-shaft hydroelectric generation system |
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