CN104005904B - Shore-based energy collecting type wave energy power generation device - Google Patents

Abstract

The invention belongs to the field of renewable energy resources and relates to a novel wave energy power generation device which can collect wave energy and convert the wave energy into ocean currents in a pipeline so as to generate power by driving a turbine through the ocean currents. The turbine is directly placed in a water channel, and blades are driven to rotate through kinetic energy of sea water. The pitch angle can be automatically changed by the blades of the turbine so as to adapt to changes of the direction of the ocean currents in the pipeline, and therefore the starting performance of the turbine is improved, and the rotating direction of the turbine is not changed. The device is easy to construct, a power generator does not make contact with sea water, and the reliability is high; the shrinking water channel is used for collecting the wave energy and converting the wave energy into reciprocating ocean current energy in the vertical water channel; the power generator is directly driven through the passive self-pitch-changing turbine; the reliability and the converting efficiency are effectively improved; due to the fact that the power generator is placed on the shore and does not make contact with sea water, the power generator is convenient to maintain, and operating cost is reduced.

Description

Shore-based energy-concentrating wave energy generation device

technical field

The invention belongs to the field of renewable energy, and relates to a novel wave energy generating device capable of gathering wave energy, converting the wave into ocean current in a pipeline, and using the ocean current to drive a turbine to generate electricity.

Background technique

Energy is a necessary condition for the survival and development of human beings. The exploitable amount of fossil energy is gradually decreasing, and human beings can only look for alternative energy sources. Among them, the wave energy reserves are huge and have considerable development prospects, but the development of wave energy is still in the research stage and cannot meet the requirements of commercialization. Although wave energy technology demonstration projects have been implemented in recent years, the technology is immature and cannot be widely promoted. Oscillating water column wave energy conversion technology is an important wave energy development method. It converts the reciprocating motion of waves into reciprocating motion of air, and drives the impeller to rotate through compressed air flow. Most of this technology uses an air Wells turbine as a wave energy converter. This turbine is a pneumatic turbine. The energy needs to be converted twice before it can be used by the turbine, and the conversion efficiency is low. The invention aims to propose a brand-new wave energy power generation method.

Contents of the invention

The purpose of the present invention is to develop a new type of wave energy generating device that can gather wave energy and convert the wave into ocean current in the pipeline, and utilize the ocean current to drive a turbine to generate electricity.

Technical scheme of the present invention:

The generator is installed on the shore without contact with seawater, avoiding the corrosion of seawater. The turbine is directly placed in the water channel, and the kinetic energy of seawater is used to drive the blades to rotate. The turbine blades can automatically change the pitch angle to adapt to the change of the direction of the sea current in the pipeline, which improves the start-up performance of the turbine and keeps the rotation direction unchanged.

Shore contraction water channel is trumpet-shaped, the opening is elliptical and the turbine is circular, the two have a large area ratio, and the water velocity at the turbine is several times that of the opening. Waves pour into the water channel from the opening, and after shrinking the channel, they are converted into reciprocating ocean currents in the vertical channel. In order to prevent large rocks from being washed into the waterway in extreme weather, a certain distance is kept from the opening of the waterway to the seabed and the section is vertical. The bottom of the constricted channel is sloped downwards, which reduces the chance of sediment adhering to the channel.

The turbine is placed in the middle of the water level difference in the vertical water channel, and is connected with the generator rotor through the main shaft. The top of the vertical water channel is rounded, which can ensure smooth air exchange and reduce the noise of air exchange. The air exchange channel can ensure that the vertical waterway is connected with the external atmosphere, and avoid affecting the highest water level of the vertical waterway due to air compression when waves rush into the vertical waterway. The generator is fixed on the shore, and the gantry crane is used to lift it together with the turbine when maintenance is required. Maintenance is carried out on the shore without contact with seawater, which reduces the cost and difficulty of maintenance.

Invention effect

The invention is simple in construction, does not contact the generator with seawater, and has high reliability; the shrinking channel is used to gather wave energy and convert it into reciprocating ocean current energy in the vertical channel; the generator is directly driven by the passive variable-pitch turbine; effectively improving the Reliability and conversion efficiency; Since the generator is placed on the shore and does not touch seawater, it is convenient for maintenance and reduces operating costs.

Description of drawings

Accompanying drawing 1 is a schematic side view of the present invention.

Accompanying drawing 2 is the schematic front view of the present invention.

Among them: A: Broken face, B: Bottom of shrinking channel, 1: Gantry crane, 2: Generator, 3: Side arm, 4: Main shaft, 5: Bearing, 6: Turbine, 7: Blade, 8: Shrinking channel, 9 : vertical water channel, 10: air exchange channel, 11: highest position on the water surface, 12: large mouth (shrinking water channel inlet).

detailed description

The shore generator 2 is connected to the gantry crane 1 through the side arm 3 . The motor 2 is fixed on the shore, and when maintenance is required, the motor 2 can be lifted by the gantry crane 1 to lift the turbine 6 out of the water. The motor 2 and the turbine 6 are connected through the main shaft 4, and the main shaft is limited by the side arm and the bearing 5 in the water channel. Waves pour into the shrinking waterway 8 through the large mouth 12 of the bell mouth shape, and the highest position of the water surface in the vertical waterway 9 is at 11. Large mouth 12 is oval, and small mouth is circular. Below the outside of the large mouth 12 is a broken straight face A, which can prevent large stones from being washed into the shrinking channel 8. The bottom B of the shrinking waterway 8 is inclined downward, so that the silt entering the shrinking waterway 8 can flow back slowly to prevent the silt from adhering in the shrinking waterway 8 . After the water flow enters the vertical channel 9, the blade 7 automatically adjusts the pitch angle and starts to rotate. After starting, the turbine rotates at high speed, which has high energy conversion efficiency. When the water level in the water channel drops, the blade 7 adjusts the angle in reverse, and the direction of rotation is consistent with when the water flow enters the water channel. The water channel is not sealed, and the air is exchanged with the outside world through the air exchange channel 10 .

Claims (1)

1. The shore-based energy-concentrating wave energy generation device is characterized in that: the generator (2) is connected to the gantry crane (1) through the side arm (3), the motor (2) is fixed on the shore, and the motor (2) is connected to the turbine (6) Connected by the main shaft (4), the main shaft is limited by the side arm and the bearing (5) in the water channel, and the waves pour into the shrinking water channel (8) through the bell-shaped mouth (12), and the highest vertical water channel (9) The water surface is at the highest position (11) on the water surface, the big mouth (12) is oval, the small mouth is circular, the outer side of the big mouth (12) is a broken straight surface A, and the bottom B of the shrinking channel (8) is inclined downward. After the water flow enters the vertical waterway (9), the blades (7) automatically adjust the pitch angle and start to rotate. After starting, the turbine rotates at a high speed. When the water level in the waterway drops, the blades (7) can reversely adjust the angle, rotation direction and water flow Consistent when entering the water channel, the water channel is not sealed, and communicates with the outside world through the air exchange channel (10).