Wave-direction-adaptive wave focusing type wave energy convertor with multiple water channels

Patent metadata

Field	Value
Publication number	US-11353000-B2
Application number	US-201916980737-A
Country	US
Kind code	B2
Filing date	Oct 11, 2019
Priority date	Oct 11, 2019
Publication date	Jun 7, 2022
Grant date	Jun 7, 2022

Abstract

A wave-direction-adaptive wave focusing type wave energy convertor with multiple water channels, comprising an energy acquisition system, an energy conversion system and a support system. Wave focusing is carried out through double water channels, so that the movement amplitude of water particles behind a box is doubled. A device is connected with a fixed pile through universal bearings, so that an opening of the device is always faced to a wave flow direction, which adapts to different seasons and water conditions, has low environmental requirements, and can be used in a wide sea area. Several coils of pretension spring compression are arranged in a winding barrel, so that a nylon rope connected to a buoy is ensured to be always in a straightened state and not derail from pulley blocks to work abnormally due to looseness whether the buoy is at a wave crest or a wave trough.

First claim

The invention claimed is:

1. A wave-direction-adaptive wave focusing type wave energy convertor with multiple water channels, comprising an energy acquisition system, an energy conversion system and a support system;
the energy acquisition system comprises an external water baffle ( 1 ), a streamlined flow-guiding box ( 2 ), a buoy ( 3 ), a slide rail ( 4 ), fixed rods ( 5 ), a location hole for a pile ( 6 ), a high strength nylon rope ( 7 ) and water channels ( 29 ); said water channels include left and right symmetrical channels;
the external water baffle ( 1 ) is in a shape of semi-open dust-pan in a top view, and when working, a wave enters through an opening, and the external water baffle ( 1 ) passes through a free water surface vertically; the external water baffle ( 1 ) is sleeved on the periphery of the streamlined flow-guiding box ( 2 ), and the water channels ( 29 ) area is formed between the external water baffle ( 1 ) and the streamlined flow-guiding box ( 2 ); when entering through the opening, the wave is divided into the left and a right symmetrical water channels ( 29 ) by the streamlined flow-guiding box ( 2 ); the wave propagation direction is gradually changed by the left and a right water channels ( 29 ), and when the left and a right water channels reach an intersection of water channels ( 30 ), the directions of the left and a right water channels become collinear, so that the waves in the left and a right water channels can collide head-on; nine high strength steel pipes coated with a corrosion-resistant material on the surface are used as the fixed rods ( 5 ) for connection, and are respectively connected between the external water baffle ( 1 ) and the upper and lower ends of the streamlined flow-guiding box ( 2 ), so that the external water baffle ( 1 ) and the streamlined flow-guiding box ( 2 ) can rotate together as a whole; the height of the external water baffle ( 1 ) and the streamlined flow-guiding box ( 2 ) shows a parabolic increasing law from a head wave side to a back wave side; the distance between the external water baffle ( 1 ) and the streamlined flow-guiding box ( 2 ) shows a decreasing law in the first half, and keeps unchanged in the second half; a cylindrical concave groove is the location hole for the pile ( 6 ) and is formed in the center of the bottom surface of the streamlined flow-guiding box ( 2 ), and the location hole for the pile ( 6 ) is matched with the upper end of the pile ( 15 ) through ball bearings ( 13 ); the vertical slide rail ( 4 ) is fixed at the intersection of water channels ( 30 ) near the outer wall of the streamlined flow-guiding box ( 2 ), the cylindrical buoy ( 3 ) is connected to the slide rail ( 4 ), and the high strength nylon rope ( 7 ) is connected to the center point of the bottom surface of the buoy ( 3 ); when working, the wave enters the energy acquisition system through the opening of the external water baffle ( 1 ) and is divided into two parts to enter the left and right water channels due to the hindering effect of the streamlined flow-guiding box ( 2 ); due to the gradual narrowing and direction change of the water channels, the water level is gradually raised, and the wave movement is changed from an initial parallel movement to a final collinear face-to-face movement; at the ends of the water channels, the two parts of wave collide and the amplitudes of movement are superimposed, driving the buoy ( 3 ); while the buoy ( 3 ) moves up and down with the wave, the kinetic energy of the buoy ( 3 ) is collected and transferred to the energy conversion system by the high strength nylon rope ( 7 ) connected to the bottom of the buoy ( 3 );
the energy conversion system comprises the high strength nylon rope ( 7 ), fixed pulley blocks ( 8 ), a power generator room ( 9 ), a current rectifier ( 11 ), a storage battery ( 12 ), the ball bearings ( 13 ) and accesses for maintenance ( 14 ), wherein the power generator room ( 9 ) comprises cables ( 10 ), a flywheel rotor ( 17 ), cooling plates ( 18 ), an electric generator ( 19 ), an electric generator room ( 20 ), a waterproof shell ( 21 ), a gear set ( 23 ), a shaft ( 24 ) and a cable channel ( 25 ), and the gear set ( 23 ) comprises a nylon rope winding barrel ( 22 ), a pretension spring compression ( 16 ), a fixed gear ( 28 ), a ratchet ( 26 ) and a pawl ( 27 ); the high strength nylon rope ( 7 ) passes through the fixed pulley blocks ( 8 ) fixed on the external water baffle ( 1 ) and the streamlined flow-guiding box ( 2 ), and is finally connected to the nylon rope winding barrel ( 22 ) in the gear set ( 23 ); in the gear set ( 23 ), the nylon rope winding barrel ( 22 ) and the fixed gear ( 28 ) are coaxially fixed together, and a section of pretension spring compression ( 16 ) is placed around the central axis in the nylon rope winding barrel ( 22 ); the pawl ( 27 ) is fixed on the fixed gear ( 28 ) and pushed by a spring attached thereon to always rotate towards the central axis side, and the front section of the pawl is provided with a cantilever protruding forward, so that the fixed gear ( 28 ) can drive the pawl ( 27 ) to push the ratchet ( 26 ) to rotate together only when the fixed gear rotates in one direction, and when the fixed gear rotates in the other direction, the pawl ( 27 ) will only skim over a gear of the ratchet ( 26 ), but will not drive the gear to rotate together; the ratchet ( 26 ) and the fixed gear ( 28 ) are not fixed together, and a layer of ball bearings are arranged between the central axes of the two, so that the two are coaxial but can rotate relative to each other; in the power generator room ( 9 ), the ratchet ( 26 ) and the flywheel rotor ( 17 ) are simultaneously fixed on the same shaft ( 24 ), and the ball bearings ( 13 ) are simultaneously arranged on the upper and lower sides of the ratchet ( 26 ) and the flywheel rotor ( 17 ); a plurality of cooling plates ( 18 ) are evenly arranged on the outer side of a flywheel room so as to transfer the internal energy generated when a flywheel rotates; the lower side of the flywheel rotor ( 17 ) is connected with the electric generator room ( 20 ) to convert the kinetic energy generated by the flywheel rotor ( 17 ) into electric energy; finally, the waterproof shell ( 21 ) is sleeved on the outer side of the power generator room ( 9 ) to prevent seawater from seeping into the electric generator and the gear; the cables ( 10 ) led out from the electric generator room ( 20 ) pass through the cable channel ( 25 ), electric energy is transferred first to the current rectifier ( 11 ) and then to the storage battery ( 12 ) after rectification, and two cables ( 10 ) are externally connected to the storage battery to export electric energy; the accesses for maintenance ( 14 ) are reserved on the outer side of the current rectifier ( 11 ) and the storage battery ( 12 ) for the convenience of maintenance; when working, the high strength nylon rope ( 7 ) passes through the fixed pulley blocks and is wound on the nylon rope winding barrel ( 22 ); the high strength nylon rope ( 7 ) moves to drive the rotation of the nylon rope winding barrel ( 22 ), which in turn drives the rotation of the fixed gear ( 28 ) fixed with the nylon rope winding barrel ( 22 ); with the existence of the pawl ( 27 ), the fixed gear ( 28 ) can drive the ratchet ( 26 ) to rotate together only when the fixed gear ( 28 ) rotates in one direction; the ratchet ( 26 ) rotates to drive the flywheel rotor ( 17 ) coaxial with the ratchet ( 26 ) to rotate together, and the flywheel rotor ( 17 ) rotates normally and generates electricity in the power generator room ( 9 ) below; the electric energy generated is transferred by the power generator room ( 9 ) to the current rectifier ( 11 ), and a current is stabilized by the current rectifier ( 11 ) before being transferred to the storage battery ( 12 ); and
the support system comprises the ball bearings ( 13 ) and the pile ( 1

Assignees

• Univ Dalian Tech

Inventors

• Zhang Chongwei
• Ding Zhenyu
• Ning Dezhi

Classifications

• H02K11/05

  Rectifiers associated with casings, enclosures or brackets · CPC title

• Y02E10/30

  Energy from the sea, e.g. using wave energy or salinity gradient · CPC title

• H02K11/0094

  Structural association with other electrical or electronic devices · CPC title

• F05B2250/72

  symmetric · CPC title

• H02K7/1823 Primary

  structurally associated with turbines or similar engines · CPC title