Shore-approaching type multi-stage wave energy power generation device

Abstract

The utility model discloses an in-shore type multi-stage wave energy power generation device which comprises a compressed air chamber power generation system and a floating body power generation system. The compressed air chamber power generation system comprises a cavity with openings in the bottom and one side; a movable baffle capable of moving relative to the other side of the opening is arranged at the opening in one side of the cavity; the bottom opening of the cavity is used for extending into the water body to form liquid seal, so that the space above the liquid seal forms a compressed air chamber; the movable baffle is used for transversely moving under the action of wave thrust so as to convert kinetic energy of waves into energy of gas in the compressed gas chamber; a ventilation opening is formed in the top of the cavity, and an air turbine generator is arranged at the ventilation opening. The floating body power generation system comprises a floating body which is arranged on the movable baffle and can move up and down along with waves impacted on the movable baffle; and the floating body is connected with a hydraulic turbine generator capable of generating power along with the up-and-down movement of the floating body. When the device is impacted by waves, the device can simultaneously drive the air turbine and the hydraulic turbine generator to rotate and generate power from three directions, so that the power generation efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to a wave energy power generation device, in particular to a shore-based multi-stage wave energy power generation device. Background Art

[0002] Wave energy is a clean and renewable energy source with extremely rich reserves. In the nearly 100 years of exploration, the oscillating water column wave energy power generation technology has stood out due to its relatively stable and reliable operation and high power generation efficiency. Its principle is to rely on the oscillation of the wave water column in a closed air chamber (except for the specially set air outlet) to squeeze the air in the air chamber out and inhale the air chamber. The reciprocating movement of the air drives the wind turbine installed on the air outlet to rotate at high speed to generate electricity.

[0003] As for the traditional oscillating water column wave energy power generation technology, it only uses the potential energy change caused by the increase of water level in the air chamber to drive the air in and out of the air chamber, and the energy utilization efficiency needs to be further improved. Utility Model Content

[0004] Purpose of the utility model: The purpose of the utility model is to provide a shore-based multi-stage wave energy power generation device that can collect wave energy from multiple directions to improve power generation efficiency.

[0005] Technical solution: The shore-based multi-stage wave energy power generation device described in the utility model includes a compressed air chamber power generation system and a floating body power generation system; the compressed air chamber power generation system includes a chamber with a bottom and an opening on one side; a movable baffle that can move relative to the other side of the opening is provided at the opening on one side of the chamber; the opening at the bottom of the chamber is used to extend into the water body to form a liquid seal so that the space above the liquid seal forms a compressed air chamber; the movable baffle is used to move laterally under the action of wave thrust so as to convert the kinetic energy of the wave impacting the baffle into the energy of the gas in the compressed air chamber; a vent is provided at the top of the chamber, and an air turbine generator for generating electricity under the pressure of the gas in the compressed air chamber is provided at the vent; the floating body power generation system includes a floating body arranged on the movable baffle and can move up and down with the waves impacting the movable baffle; the floating body is connected to a hydraulic turbine generator that can generate electricity as the floating body moves up and down.

[0006] Among them, the air turbine generator is a bidirectional impulse air turbine generator, including a rotating shaft fixed between an upper base and a lower base and connected to a first generator extension shaft, the rotating shaft is provided with a runner blade that can drive the rotating shaft to rotate; a ventilation pipe is provided on the outer side of the runner blade.

[0007] The runner blades are symmetrical airfoils, which are used to keep the rotation direction of the runner blades unchanged when the air flow direction changes.

[0008] Among them, the hydraulic turbine generator includes a transmission shaft connected to the extended shaft of the second generator, and turbine blades are fixed on the transmission shaft; a sleeve is provided on the outer side of the turbine blade; the sleeve can produce relative movement with the water body as the floating body oscillates in the vertical direction, thereby driving the turbine blades to rotate; the generator is arranged in the floating body; the second generator includes a generator body, bolts fixed on the generator body for connecting to the floating body, and an extended shaft connected to the transmission shaft, and a wiring port for electrical connection with the outside world.

[0009] Among them, the side wall of the chamber is provided with a transverse sliding track for facilitating the transverse sliding of the movable baffle; there are two transverse sliding tracks; the transverse sliding track is a cross bar fixed on the side wall of the chamber, and the cross bar passes through the movable baffle to enable the movable baffle to slide along the cross bar.

[0010] Wherein, the surface of the movable baffle is provided with a vertical sliding track for facilitating the floating body to slide up and down; two vertical sliding tracks are provided; and the floating body is clamped on the vertical sliding tracks.

[0011] Beneficial effects: Compared with the prior art, the present invention has the following significant effects: (1) The present invention makes full use of the three parts of energy that waves have when they impact the bank slope. The first part is the kinetic energy of the gas generated by the air in the air chamber being pushed out and brought into the vent due to the wave impacting the bank slope itself, which causes the air in the air chamber to be raised and lowered; the second part is the energy of the air in the compressed air chamber generated by the wave impacting the movable baffle; and the third part is the energy of the wave in front of the movable baffle, which can be converted by the vibration of the floating body. According to experimental tests, the three parts work together to improve the power generation efficiency of the traditional oscillating water column power generation device by 3 to 4 times. (2) In the present invention, the air turbine generator is a bidirectional impulse turbine, and the runner blades adopt a symmetrical airfoil design, so that the inflow or outflow of airflow can drive the turbine to rotate in a single direction, preventing the reversal or stop of the generator caused by the reciprocating process of the airflow in and out, which causes the current direction to change or fluctuate violently, and solves the defect of the turbine stopping or reversing due to the change of airflow direction. The blades can be 3D printed according to the design form of the attached figure, and the feasibility of operation has been fully demonstrated by experiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is a schematic diagram of the structure of a bidirectional impulse air turbine generator;

[0014] Figure 3 It is a detailed schematic diagram of a symmetrical airfoil turbine;

[0015] Figure 4 It is a schematic diagram of a water turbine generator;

[0016] Figure 5 This is a schematic diagram of the generator inside the floating body;

[0017] Figure 6 This is a schematic diagram of the working process of a shore-based multi-stage wave energy power generation device. DETAILED DESCRIPTION

[0018] The technical solution of the utility model is further described below in conjunction with the accompanying drawings of the specification.

[0019] like Figure 1 As shown, the utility model provides a shore-based multi-stage wave energy power generation device, including a compressed air chamber power generation system and a floating body power generation system. The compressed air chamber power generation system includes a chamber with a bottom and an opening on one side; a movable baffle 105 that can move relative to the other side of the opening is provided at the opening on one side of the chamber; the chamber specifically includes a top plate 102, two side wing walls 103, a transverse sliding shaft 104 fixed on the two side wing walls, and a movable baffle 105 that passes through the transverse sliding shaft 104 and can slide horizontally radially along the sliding shaft; the bottom opening of the chamber is used to extend into the water body to form a liquid seal so that the space above the liquid seal forms a compressed air chamber; the air turbine generator 101 is placed at the vent of the top plate of the air chamber, which is the only channel for the closed air chamber to exchange with the outside air. The movable baffle 105 is used to move laterally under the action of wave thrust, so as to convert the kinetic energy of the wave impacting the baffle into the energy of the gas in the compressed air chamber. The floating power generation system includes two vertical sliding rails 108 fixed to the outer surface of the movable baffle 105, and a floating body 106 arranged on the two vertical sliding rails 108 and capable of moving up and down with the waves impacting the movable baffle 105; the floating body 106 is a cavity floating body; the floating body 106 is connected to a hydraulic turbine generator 107 that can generate electricity as the floating body 106 moves up and down.

[0020] like Figure 2 As shown, the air turbine generator 101 is a bidirectional impulse air turbine generator, including a rotating shaft 201, an upper base 202, runner blades 203, a ventilation pipe 204, a lower base 205, and a first generator. The rotating shaft 201 is fixed between the upper base and the lower base, the inner wall of the rotating shaft 201 is provided with an internal thread, the outer wall of the extended shaft of the first generator is provided with an external thread matching the internal thread, and the rotating shaft 201 and the first generator are connected through the internal thread and the external thread; the runner blades are fixed on the rotating shaft and can drive the rotating shaft to rotate; the ventilation pipe is sleeved on the outer side of the runner blades. The runner blades 203 are symmetrical airfoils, such as Figure 3 As shown, the blades are symmetrically designed so that the inflow or outflow of air can drive the turbine to rotate in a single direction, preventing the reversal or stop of the generator caused by the reciprocating process of airflow in and out, which may cause the current direction to change or fluctuate violently. Figure 3 The design form was 3D printed and the feasibility of operation was fully demonstrated through experiments.

[0021] like Figure 4 As shown, a hydro turbine generator 107 includes a transmission shaft 301, turbine blades 302, a sleeve 303, a balancing blade 304, and a second generator. The turbine blades 302 are fixed on the transmission shaft 301, and the sleeve 303 is sleeved on the outside of the turbine blades 302; the inner wall of the transmission shaft 301 is provided with an internal thread, and the outer wall of the extended shaft 403 of the second generator is provided with an external thread matching the internal thread, and the transmission shaft 301 and the second generator are connected through the internal thread and the external thread; the second generator in the hydro turbine generator 107 is arranged in the floating body 106. When the waves oscillate, the sleeve 303 can produce relative motion with the water body in the vertical direction, driving the turbine blades 302 to rotate at high speed, and the turbine blades 302 drive the transmission shaft 301 to rotate at high speed, thereby enabling the second generator connected to the transmission shaft 301 to generate electricity.

[0022] like Figure 5 As shown, the second generator placed in the buoy and connected to the transmission shaft 301 includes a generator body 401, four fixing bolts 402 fixed to the generator body, and an extension shaft 403 connected to the transmission shaft 301, and a connection port 404 for electrical connection with the outside world. During installation, the transmission shaft 301 of the hydro turbine generator is connected to the extension shaft 403 by threading. The generator body 401 is fixed to the inner wall of the buoy by four fixing bolts 402. When the second generator is working, the current is transmitted to the outside world through the wires of the connection port.

[0023] The first generator in the air turbine generator 101 of this embodiment has the same structure as the second generator in the water turbine generator 107 , and both are generators that generate electricity based on the principle of electromagnetic induction.

[0024] like Figure 6 The figure shows the working process of the shore-based multi-stage wave energy power generation device of the utility model under the action of waves. Figure 6The solid line in the middle is the initial state, i.e., the state with a lower water level when the waves recede (hereinafter referred to as state one), and the dotted line is the state with the highest water level when the waves are blocked and the slope is raised (hereinafter referred to as state two). In one of the reciprocating processes of the waves hitting the slope, the shore-based multi-stage wave energy power generation device is first in state one. When the waves move toward the slope, the movable baffle 105 moves in the same direction under the thrust of the waves, and at the same time the water level in the air chamber rises. The two together compress the air in the air chamber and discharge it, driving the runner blades 203 in the bidirectional impulse air turbine generator 101 to rotate at high speed. The runner blades 203 drive the rotating shaft 201 to rotate at high speed, thereby driving the rotating shaft of the first generator connected to the rotating shaft 201 to rotate at high speed, thereby generating electricity. When the waves recede, the shore-based multi-stage wave energy power generation device turns from state two to state one. The water level inside the air chamber is higher than that outside. Under the thrust of the water, the movable baffle 105 It moves away from the bank slope and the water level drops. Under the combined effect of the two, the space in the air chamber is released, and air is sucked back into the air chamber, driving the bidirectional impulse air turbine generator 101 to rotate at high speed to generate electricity. At the same time, when the state one and the state two act back and forth, the float 106 on the movable baffle 105 makes a vertical reciprocating motion as the water level in front of the movable baffle 105 rises and falls, so that the sleeve 303 in the hydraulic turbine generator 107 oscillates in the vertical direction and produces relative motion with the water body, thereby driving the turbine blades 302 to rotate, and then driving the transmission shaft 301 to rotate, so that the transmission shaft connection 403 of the second generator arranged in the float 106 rotates, thereby generating electricity.

[0025] The shore-based multi-stage wave energy power generation device can be installed on a shallow beach with a certain water depth or a steep coastal slope facing the air surface. The devices can be arranged in groups with the wing walls on both sides as barriers to form a large-scale power generation unit.

Claims

1. A shore-based multi-stage wave energy power generation device, characterized in that: The invention comprises a compressed air chamber power generation system and a floating body (106) power generation system; the compressed air chamber power generation system comprises a chamber with a bottom and an opening on one side; a movable baffle (105) movable relative to the other side of the opening is provided at the opening on one side of the chamber; the opening at the bottom of the chamber is used to extend into the water body to form a liquid seal so that the space above the liquid seal forms a compressed air chamber; the movable baffle (105) is used to move laterally under the action of wave thrust so as to convert the kinetic energy of the wave impacting on the baffle into the energy of the gas in the compressed air chamber; a vent is provided at the top of the chamber, and an air turbine generator (101) for generating electricity under the pressure of the gas in the compressed air chamber is provided at the vent; the floating body (106) power generation system comprises a floating body (106) arranged on the movable baffle (105) and capable of moving up and down with the waves impacting the movable baffle (105); the floating body (106) is connected to a hydraulic turbine generator (107) capable of generating electricity with the movement of the floating body (106) up and down.

2. The shore-based multi-stage wave energy power generation device according to claim 1, characterized in that: The air turbine generator (101) comprises a rotating shaft (201) fixed between an upper base (202) and a lower base (205) and connected to a first generator extension shaft; the rotating shaft (201) is provided with a runner blade (203) capable of driving the rotating shaft (201) to rotate; and a ventilation pipe (204) is sleeved on the outer side of the runner blade (203).

3. The shore-based multi-stage wave energy power generation device according to claim 2, characterized in that: The runner blades (203) are symmetrical airfoils, and are used to keep the rotation direction of the runner blades unchanged when the air flow direction changes.

4. The shore-based multi-stage wave energy power generation device according to claim 1, characterized in that: The water turbine generator (107) comprises a transmission shaft (301) connected to the second generator extension shaft, and a turbine blade (302) is fixed on the transmission shaft (301); a sleeve (303) is sleeved on the outer side of the turbine blade (302); the sleeve (303) can oscillate along the vertical direction of the floating body (106) to generate relative movement with the water body, thereby driving the turbine blade (302) to rotate.

5. The shore-based multi-stage wave energy power generation device according to claim 4, characterized in that: The second generator comprises a generator body (401), bolts (402) fixed on the generator body for connecting to a floating body, a protruding shaft (403) connected to a transmission shaft (301), and a connection port (404) for electrical connection to the outside world.

6. The shore-based multi-stage wave energy power generation device according to claim 1, characterized in that: The side wall of the chamber is provided with a transverse sliding track (104) for facilitating the transverse sliding of the movable baffle (105).

7. The shore-based multi-stage wave energy power generation device according to claim 6, characterized in that: The transverse sliding track (104) is a crossbar fixed on the side wall of the chamber, and the crossbar passes through the movable baffle to enable the movable baffle to slide along the crossbar.

8. The shore-based multi-stage wave energy power generation device according to claim 1, characterized in that: The surface of the movable baffle is provided with a vertical sliding track (108) for facilitating the floating body to slide up and down.

9. The shore-based multi-stage wave energy power generation device according to claim 8, characterized in that: The floating body (106) is clamped on the vertical sliding track (108).

10. The shore-based multi-stage wave energy power generation device according to claim 4, characterized in that: The outer surface of the sleeve (303) is provided with balancing blades (304) for balancing.

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