CN102168642B - Oscillating tidal current power generation device - Google Patents

Abstract

The invention provides an oscillating tidal current power generation device, which includes a base, a column, a tidal current energy-absorbing plate, a power generation oil cylinder, a hydraulic accumulator, a generator and a power generation hydraulic motor, the column is installed on the base, and at least one swing arm is installed on the column , There is a power generation cylinder connected between the swing arm and the column, and both ends of the swing arm are equipped with tidal current energy absorbing plates. The hydraulic motor is connected, the generating hydraulic motor, the hydraulic accumulator and the generator are all installed on the column, and the generating hydraulic motor is connected with the generator. The present invention utilizes the power flow driven hydraulic device to realize the conversion of mechanical energy into electric energy, the power flow energy absorbing plate oscillates to generate high-pressure hydraulic oil, and the power generation hydraulic motor rotates to drive the generator to generate electricity. The invention has a simple structure, is not only suitable for the strong current area sea area, but also suitable for the slow flow area and shallow sea area with low flow velocity, easy installation and maintenance, high reliability and low failure rate.

Description

Oscillating tidal current power generation device

technical field

The invention relates to a power generation device suitable for ocean tidal current power generation, which belongs to the technical field of power generation.

Background technique

With the rapid development of the economy, the consumption of resources has increased sharply, and the contradiction between energy supply and demand has become increasingly prominent. Fossil fuel resources are limited, and the consumption of more fossil fuels will inevitably cause more serious environmental pollution. The ocean area accounts for 71% of the total area of the earth. Most of the energy from the sun reaching the earth falls on the sky above the ocean and in the seawater. Part of the energy is attached to the seawater in the form of waves, currents, tides, and temperature differences through various physical or chemical processes. The available energy in ocean energy greatly exceeds the sum of the current global energy demand, and it is a clean and renewable energy. The scientific development and utilization of ocean energy is of great significance for adjusting the energy structure, alleviating energy shortage and environmental pollution.

Tides are the periodic rise and fall of seawater formed by the gravitational pull of the moon and the sun. Tidal phenomena are accompanied by two forms of movement: one is the vertical rise and fall of sea water caused by high tide and ebb tide, which is commonly referred to as tide; the other is the horizontal movement of sea water, namely ocean currents. The energy (tidal energy) carried by the former (vertical lift of seawater) is potential energy; while the energy (tidal energy) carried by the latter is kinetic energy. A current generally refers to the regular flow of sea water accompanying the tidal phenomenon, which changes its magnitude and direction twice a day.

Compared with other power generation methods, using tidal current energy to generate electricity has the following characteristics: tidal current energy is a renewable and clean energy; the energy density of tidal current energy is much higher than that of wind energy and solar energy, and the total reserve is huge; Energy that changes in space, but its changes are regular and can be predicted in advance; tidal current power generation does not block the sea and build dams, has little impact on marine life, and will not produce three wastes pollution to the environment.

Currently representative tidal current energy generation technology mainly adopts impeller energy absorption technology, such as a "vertical axis tidal current power generation device" disclosed in Chinese patent document CN101988463A, which includes three modules: an upper platform part, a supporting frame part and an impeller part; the upper platform The part mainly includes generator, gearbox, horizontal connecting shaft, supporting platform, pillars and vertical connecting shaft; the supporting frame part is composed of upper frame plate, lower frame plate, left frame plate and right frame plate; the impeller part includes main shaft, spoke sleeves, spokes, spoke shafts, blades, blade shafts, rims and adaptive angle-of-attack devices. The impeller energy absorption technology is more suitable for sea areas with high tidal current velocity and deep sea water.

In most sea areas of my country, the time of high tidal current velocity is relatively short and the average velocity is relatively low. It is a trend to develop tidal current oscillation power generation technology suitable for low-velocity and shallow waters, but tidal current oscillation power generation technology has not yet achieved actual progress.

Contents of the invention

The invention aims at the deficiencies in the existing tidal current power generation technology, and provides an oscillating tidal current power generation device with good maintainability and low maintenance cost. The power generation device can adapt to the characteristics of high tidal current velocity, short time and low average velocity in most sea areas of our country.

The oscillating tidal current power generation device of the present invention adopts the following technical solutions:

The oscillating tidal current power generation device includes a base, a column, a tidal current energy-absorbing plate, a power generation oil cylinder, a hydraulic accumulator, a generator and a power generation hydraulic motor, the column is installed on the base, and at least one swing arm is installed on the column, and the swing arm and There is a power generation cylinder connected between the columns, and both ends of the swing arm are equipped with energy-absorbing panels. The power generation cylinder is connected to the hydraulic accumulator installed on the column through the oil pipe, and the hydraulic accumulator is connected to the power generation hydraulic motor through the oil pipe. The generating hydraulic motor, the hydraulic accumulator and the generator are all installed on the column, and the generating hydraulic motor is connected with the generator.

At least one vertically placed base adjustment oil cylinder is installed on the base, and the adjustment of the base adjustment oil cylinder ensures that the column stands vertically on the seabed.

The interior of the column is provided with a channel, so that the staff can enter the interior of the column to adjust and maintain the relevant components. An energy-absorbing plate angle adjustment oil cylinder is installed between the trend energy-absorbing plate and the swing arm to adjust the upper and lower limit positions of the trend energy-absorbing plate when it swings.

When there are two or more swing arms installed on the column, each swing arm is connected by a connecting rod, and the connecting rod and each swing arm are hinged.

Both the power generation oil cylinder and the angle adjustment oil cylinder of the energy absorbing plate can adopt a swing oil cylinder.

The above-mentioned device uses the tidal current to realize the conversion of mechanical energy to electrical energy through hydraulic drive. The size of the tidal current energy-absorbing plate is not limited in the horizontal direction, and more than two swing arms can be arranged on the column in the vertical direction, with multiple pairs of tidal current energy-absorbing panels. The angle adjustment of the trend energy-absorbing plate at the upper and lower limit positions can be realized by the action of the energy-absorbing plate angle adjustment oil cylinder. The oscillation range of the energy absorbing plate can be adjusted through the limit working positions of the power generating cylinder 5 and the generating oil cylinder 9, and the maximum oscillation angle of the energy absorbing plate can reach 60°. The trend energy-absorbing board turns automatically. The tidal current energy absorbing plate oscillates up and down, compresses the generator cylinder, and generates high-pressure hydraulic oil. The high-pressure hydraulic oil is stabilized by the hydraulic accumulator and then output to the generator hydraulic motor, which drives the hydraulic motor to rotate and drives the generator to generate electricity.

The invention has a simple structure, is not only suitable for the strong current area sea area, but also is suitable for the slow flow area and shallow sea water area with low flow velocity, and is easier to install and maintain, with high reliability and low failure rate.

Description of drawings

Fig. 1 is a schematic structural diagram of the first embodiment of the present invention.

Fig. 2 is a schematic diagram of the structure and principle of an oscillating tidal current power generation device with two swing arms.

Fig. 3 is a schematic diagram of the structure and principle of an oscillating tidal current power generation device with three swing arms.

Fig. 4 is a schematic diagram of the structure and principle of the second embodiment of the present invention.

Among them: 1. Base adjustment cylinder, 2. Upright column, 3. Swing arm, 4. Trend energy absorbing plate, 5. Power generation cylinder, 6. Top platform, 7. Generator, 8. Power generation hydraulic motor, 9. Power generation cylinder, 10. Energy absorbing plate angle adjustment oil cylinder, 11. Energy absorbing plate angle adjusting oil cylinder, 12. Base, 13. Swing oil cylinder, 14. Swing oil cylinder, 15. Oil pipe, 16. Hydraulic accumulator, 17. Trend energy absorbing plate, 18. Swing oil cylinder.

Detailed ways

Example 1

As shown in Figure 1, the oscillating tidal current power generation device of the present invention includes a base 12, a base adjustment cylinder 1, a column 2, a tidal current energy absorbing plate 4, a hydraulic accumulator 16, a power generation cylinder 5, a generator 7, and a power generation hydraulic motor 8. Power generation oil cylinder 9 and energy absorbing plate angle adjustment oil cylinder 10. Column 2 is installed on the base 12, and the base 12 is equipped with at least one vertically placed base adjustment oil cylinder 1 (four in Fig. 1), and the adjustment of the base adjustment oil cylinder 1 ensures that the column 2 stands vertically on the seabed. At least one swing arm 3 is installed on the column 2, the middle part of the swing arm 3 is hinged with the column 2 through a rotating shaft, and the swing arm 3 can swing around the rotating shaft. When there are two or more swing arms 3, each swing arm 3 is connected by a connecting rod, and the connecting rod and each swing arm 3 are hinged to ensure that each swing arm 3 can swing simultaneously. The oscillating tidal current generating device shown in FIG. 2 has two swing arms 3 , and the oscillating tidal current generating device shown in FIG. 3 has three swinging arms. Power generation oil cylinder 5 and power generation oil cylinder 9 are installed on the column 2, and the piston rods of power generation oil cylinder 5 and power generation oil cylinder 9 are respectively hinged with the rotating shaft both sides of a swing arm (generally the last swing arm) on the column 2. The oil inlets of the power generation oil cylinder 5 and the power generation oil cylinder 9 are connected with an oil tank, and the oil tank can be installed on the column. Both ends of the swing arm 3 are equipped with tidal current energy-absorbing plates, and the tidal current energy-absorbing plates 4 and 17 at the two ends of the swinging arm 3 are respectively installed with an energy-absorbing plate angle adjustment oil cylinder 10 and an energy-absorbing plate Angle adjustment oil cylinder 11. Under the action of the energy-absorbing plate angle adjustment oil cylinder 10 and the energy-absorbing plate angle adjustment oil cylinder 11, the trend energy-absorbing plate 4 at both ends of the swing arm 3 can swing to adjust the angle. The top of the column 2 is provided with a top platform 6 on which a generating hydraulic motor 8 and a generator 7 are installed, and the generating hydraulic motor 8 is connected to the generator 7 . The working environment of power generation cylinder 5, power generation cylinder 9 and base adjustment cylinder 1 is special, and it should ensure good seawater pressure resistance and sealing performance under different water depth conditions, so that the oil pressure generated by it is less affected by seawater pressure . The hydraulic accumulator 16 is installed inside the column 2, the power generation cylinder 5 is connected with the hydraulic accumulator 16 through the oil pipe 15, and the hydraulic accumulator 16 is connected with the power generation hydraulic motor 8 through the oil pipe. A safety fence can be set on the top platform 6. A channel is reserved inside the column 2, so that the staff can enter the inside of the column 2 to adjust and maintain related equipment.

The invention realizes the transformation of mechanical energy into electric energy through hydraulic drive by utilizing the power flow. The angle adjustment of the trend energy absorbing plates 4 and 17 at the upper and lower limit positions can be realized by the energy absorbing plate angle adjustment oil cylinder 10 and the energy absorbing plate angle adjustment oil cylinder 11 . The oscillation range of the energy-absorbing plate can be adjusted through the limit working positions of the power generation cylinder 5 and the power generation cylinder 9 . The energy-absorbing board turns automatically. The energy-absorbing plates 4 and 17 oscillate up and down, compress the power generation cylinder 5 and the power generation cylinder 9, and generate high-pressure hydraulic oil. Generator 7 generates electricity.

A tidal current power station builds a hydraulic drive system with a hydraulic accumulator. The hydraulic drive system has the function of tidal current energy storage, reducing the instability of tidal current power generation. When the tidal current energy is high, the hydraulic accumulator of the hydraulic drive system starts to store the tidal current energy; when the tidal current energy becomes smaller and the energy collected by the power generation system is not enough to maintain the normal power generation of the system, the hydraulic accumulator starts to supplement the power generation system energy and reduce the instability of the power generation system.

Example 2

As shown in Figure 4, in this embodiment, the power generation oil cylinder 5 and the power generation oil cylinder 9 in the embodiment 1 given in Figure 1 are replaced by a swing oil cylinder 14, and the tidal current energy absorbing plate 4 and the tidal current energy absorbing plate at both ends of the swing arm 3 17 is installed on the two ends of swing arm 3 by swing cylinder 13 and swing cylinder 18 respectively.

The tidal current energy-absorbing plate 4 and the tidal current energy-absorbing plate 17 oscillate up and down while compressing the swing oil cylinder 14 to output high-pressure oil. Swing oil cylinder 14 can be sealed in the column 2, is not corroded by sea water.

Compared with the impeller energy-absorbing technology, the size of the energy-absorbing plates 4 and 17 of the oscillating tidal current energy-absorbing device of the present invention is not limited in the horizontal direction; in the vertical direction, as the water depth increases, the tidal current energy-absorbing plates 4 can be arranged at the same time More than two groups. Compared with the axial-flow impeller power generation device, the present invention is expected to obtain at least 4 times more power generation. In near-shore and shallow water areas, the tidal current presents the form of reciprocating flow, that is, the tidal current has only two directions, positive and negative, and the flow velocity is relatively high. The symmetrical arrangement of the tidal current energy-absorbing plate 4 in the present invention is suitable for reciprocating current power generation, not only suitable for strong It is suitable for the slow flow area with low velocity.

Claims (1)

1. oscillating type tidal generating set; Comprise base, column, trend energy-absorbing plate, generating oil cylinder, hydraulic energy storage device, generator and power hydraulic motor; It is characterized in that: column is installed on the base, and a swing arm is installed on the column at least, is connected with the generating oil cylinder between swing arm and the column; The two ends of swing arm all are equipped with the trend energy-absorbing plate; The generating oil cylinder is connected through oil pipe with hydraulic energy storage device on being installed in column, and hydraulic energy storage device passes through oil pipe again and is connected with the power hydraulic motor, and power hydraulic motor, hydraulic energy storage device and generator are installed on the column; The power hydraulic motor is connected with generator, is separately installed with energy-absorbing plate angle adjustment oil cylinder between said trend energy-absorbing plate and the swing arm.

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