CN103061962A - Hydraulic combined oscillating floater wave energy generation device - Google Patents

Abstract

The invention relates to a hydraulic combined type oscillating float wave energy generating device. It includes power generation systems and stationary systems. The fixed system includes a floating tank and a fixed frame. The fixed frame is a cube structure, which is fixedly connected to the top of the floating tank. A crossbeam is arranged on the top of the fixed frame, and columns are respectively arranged at the four corners of the side of the fixed frame. The power generation system includes floats, energy conversion devices and energy output devices. The float is set on the column of the fixed frame. The top and the bottom of the float are respectively provided with four identical guiding devices for limiting the movement of the float in the horizontal direction. The energy conversion device includes a mixing tank, a hydraulic motor and four sets of identical hydraulic transmission mechanisms respectively arranged on the four-corner columns on the sides of the fixed frame. The mixing tank and the hydraulic motor are arranged on the beam of the fixed frame. The hydraulic transmission mechanism includes a hydraulic cylinder, a water inlet pipe, a water delivery pipe A and a water delivery pipe B. The invention has high energy conversion rate, good reliability, low construction cost, stable output electric energy and wide application.

Description

Hydraulic Combined Oscillating Float Wave Power Generation Device

technical field

The invention belongs to the technical field of wave energy power generation, in particular to a hydraulic combined type oscillating float wave energy power generation device.

Background technique

When a wave energy generating device performs wave energy power generation, it usually includes two energy conversion processes: first, the wave energy is converted into a form of mechanical energy that can be used by the generator, that is, a conversion process of energy; secondly, the mechanical energy is converted by the generator Output for electrical energy, that is, the secondary conversion process of energy. The core problem of the wave energy conversion device is the primary conversion process of energy. The form of mechanical energy generated by wave energy in the first conversion process is directly converted into mechanical motion by using the up and down movement of waves; some uses the up and down movement of waves to generate airflow or water flow to drive turbines to generate electricity; and some use the swing or rotation of wave devices Generate airflow or water flow to drive turbines to generate electricity; or turn low-pressure large waves into small-volume high-pressure water, and then introduce high-level water pools to generate water heads to drive turbines to generate electricity.

There are mainly two types of wave energy generation devices commonly used at present:

The oscillating water column wave energy generation device has high safety and reliability but the wave energy conversion rate is low. The existing oscillating water column wave energy generation The power generation device has higher requirements on the coastal terrain.

The over-wave type wave energy generation device has a simple structure and a high wave energy conversion rate, but due to high requirements on materials, it is easy to be damaged under the action of waves, lose working ability, and have high maintenance and protection costs.

Compared with the coastal waters of European and American countries with large wave height and high energy flow density, the wave energy cycle in my country's coastal waters is short, the wave height is small, and the utilization rate is low, which is not suitable for the above two methods.

Contents of the invention

In order to solve the above technical problems, the present invention proposes a hydraulic combined oscillating float wave energy generator with high energy conversion efficiency, which can work under different water depth conditions, relatively low construction cost, relatively stable output power, and wide application device.

The technical solution of the present invention is: a hydraulic combined type oscillating float wave energy generating device, which includes a generating system and a fixing system. Wherein, the fixed system includes a floating tank and a fixed frame. The fixed frame is a cube structure, which is fixedly connected to the top of the floating tank. A crossbeam is arranged on the top of the fixed frame, and columns are respectively arranged at four corners of the side of the fixed frame. The power generation system includes floats, energy conversion devices and energy output devices. The float is set on the column of the fixed frame and moves up and down along the column. The top and the bottom of the float are respectively provided with four identical guiding devices for limiting the movement of the float in the horizontal direction. The guiding device can eliminate the influence of waves on the horizontal overturning oscillation of the buoy, which is beneficial to the collection and conversion of wave energy. The energy conversion device includes a mixing tank, a hydraulic motor and four sets of identical hydraulic transmission mechanisms respectively arranged on the four-corner columns on the sides of the fixed frame. The mixing tank and the hydraulic motor are arranged on the beam of the fixed frame. The hydraulic transmission mechanism includes a hydraulic cylinder, a water inlet pipe, a water delivery pipe A and a water delivery pipe B. The four sides of each column are respectively provided with a hydraulic cylinder. The hydraulic cylinder is located above the float, and its sleeve end is fixedly connected to the column, and its piston rod is fixedly connected to the float through the support frame of the guide device; one end of the water inlet pipe extends into the seawater, and the other end is connected to the water inlet of the hydraulic cylinder sleeve; One end of the water pipe A is connected to the water outlet of the hydraulic cylinder sleeve, and the other end is connected to the water delivery pipe B. One end of the water delivery pipe B is connected to the outlet of the water delivery pipe A, and the other end is connected to the water inlet of the mixing tank. The water outlet of the mixing tank communicates with the water inlet of the hydraulic motor, and a drain pipe is arranged at the water outlet of the hydraulic motor to discharge excess water. The water inlet pipe, the water delivery pipe A, the water delivery pipe B and the discharge pipe are all provided with check valves. The energy output device is arranged on the beam of the fixed frame, and its input end is connected with the output end of the hydraulic motor.

The energy output device is a generator.

The guiding device includes guiding wheels and a supporting frame. The support frame is fixed on the float, the wheel shaft of the guide wheel is fixed on the support frame, and the guide wheel is in contact with the side of the column of the fixed frame.

The buoyant tank is a hollow structure, and the inside can be filled with appropriate amount of seawater or sand for counterweight according to the sea conditions, so that the entire power generation device can sink to a certain depth below the water surface, and the float can vibrate up and down at a suitable position, while ensuring The stability of the power generation plant as a whole during operation. The fixing system has a simple structure and flexible counterweight, which improves the stability and reliability of the entire power generation device, is convenient for processing and implementation, and has good economic efficiency.

The float is a hollow cylinder with an inverted conical bottom. This structure is conducive to collecting more wave energy, and its inner hollow can be loaded with counterweight according to sea conditions. The surface of the float is coated with anti-corrosion paint to prevent corrosion by seawater.

The beneficial effects of the present invention are:

1. It is a floating wave energy generating device with high utilization rate of wave energy. It is suitable for different sea conditions and is not affected by tidal range. At the same time, it is not limited by water depth conditions, especially in deep water areas exceeding 40m. It can also work normally.

2. In direct contact with waves, the number of energy conversions is small, which improves the energy conversion rate.

3. Combining individual floats further improves the utilization rate of wave energy and the reliability of the device.

4. Simple structure, less moving parts, high overall stability, good reliability, and can take into account the reliability of the structure and the wave energy conversion rate.

5. Excellent follow-up to waves, high reliability, long service life, low efficiency, easy disassembly and assembly, and easy installation and maintenance.

6. The construction cost is low, the output power is stable, and it can be used in areas where the protection requirements for the device are not too high and the wave energy density is low.

Description of drawings

Fig. 1 is the overall structural representation of the present invention;

Fig. 2 is the structural representation of single group hydraulic transmission mechanism in the present invention;

Fig. 3 is the structural representation of guiding device among the present invention;

Fig. 4 is the partially enlarged view that hydraulic cylinder is connected with float among the present invention;

Fig. 5 is a schematic diagram of the structure of the float in the present invention.

In the figure: Ⅰ, fixing system, Ⅱ, power generation system, 101, fixing frame, 102, column, 103, floating tank, 104, beam, 201, float, 202, guiding device, 203, water inlet pipe, 204, hydraulic cylinder, 205, generator, 206, hydraulic motor, 207, mixing tank, 208, drain pipe, 209, water pipe B, 210, water pipe A, 211, wheel axle, 212, guide wheel, 213, support frame, 214, piston rod .

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

Example 1

As shown in Figures 1-4: the present invention includes power generation system II and fixed system I.

Among them, the fixed system I includes a floating tank 103 and a fixed frame 101. The fixed frame 101 is a cube structure, which is fixedly connected to the top of the floating tank 103. The top of the fixed frame 101 is provided with a beam 104. The four corners of the fixed frame 101 are respectively provided with columns 102 and 102 It is a quadrangular prism structure.

The power generation system II includes a float 201, an energy conversion device and an energy output device. The four columns 102 are respectively fitted with floats 201 , and the floats 201 move up and down along the columns 102 . The top and bottom of each float 201 are provided with four identical guiding devices 202 for limiting the movement of the float 201 in the horizontal direction. The guiding device 202 can eliminate the influence of waves on the horizontal overturning and oscillation of the buoy 201, which is beneficial to the collection and conversion of wave energy. The guide device 202 includes a guide wheel 212 and a support frame 213 . The support frame 213 is fixed on the float 201 , the axle 211 of the guide wheel 212 is fixed on the support frame 213 , and the guide wheel 212 is in contact with the side of the column 102 of the fixed frame 101 .

The energy conversion device includes a mixing tank 207 , a hydraulic motor 206 and four sets of identical hydraulic transmission mechanisms respectively arranged on the four corner columns 102 on the sides of the fixed frame 101 . The mixing tank 207 and the hydraulic motor 206 are arranged on the beam 104 of the fixed frame 101 . The hydraulic transmission mechanism includes a hydraulic cylinder 204, a water inlet pipe 203, a water delivery pipe A210 and a water delivery pipe B209. Four sides of each column 102 are respectively provided with a hydraulic cylinder 204 . Each group of hydraulic transmission mechanisms includes four hydraulic cylinders 204, four water inlet pipes 203, four water delivery pipes A210 and one water delivery pipe B209. The hydraulic cylinder 204 is located above the float 201, its sleeve end is fixedly connected to the column 102, and its piston rod 214 is fixedly connected to the float 201 through the support frame 213 of the guide device 202; one end of the water inlet pipe 203 extends into the seawater, and the other end communicates with the hydraulic pressure The water inlet of the cylinder 204 sleeve; one end of the water delivery pipe A210 is connected to the water outlet of the hydraulic cylinder 204 sleeve, and the other end is connected to the water delivery pipe B209, and the outlets of the four water delivery pipes A210 are all connected to the water inlet of the water delivery pipe B209. The B209 water outlet is communicated with the water inlet of the mixing tank 207. The water outlet of the mixing tank 207 communicates with the water inlet of the hydraulic motor 206, and a drain pipe 208 is arranged at the water outlet of the hydraulic motor 206 to discharge excess water. All water inlet pipes 203, water pipes A210, water pipes B209 and discharge pipes are provided with one-way valves.

The energy output device is a generator 205, which is arranged on the beam 104 of the fixed frame 101, and the input shaft of the generator 205 is connected with the output shaft of the hydraulic motor 206 through a coupling.

The working process is as follows: waves of different directions and frequencies hit the buoy 201, and the buoy 201 absorbs the wave energy. The float 201 drives the piston rod 214 of the hydraulic cylinder 204 to move upwards, and a check valve is set on the water inlet pipe 203. Seawater can only enter the hydraulic cylinder 204 from the water inlet pipe 203, and the seawater in the hydraulic cylinder 204 passes through under the action of the piston rod 214. Water delivery pipe A210 and water delivery pipe B209 enter into mixing tank 207 . When the seawater stock in the mixing tank 207 reaches a certain level, the impact hydraulic motor 206 is discharged through the water outlet of the mixing tank 207, thereby driving the generator 205 to generate electricity. The hydraulic motor 206 directly discharges the seawater through the discharge pipe. When the float 201 descends, the piston rod 214 of the hydraulic cylinder 204 moves downward accordingly, and check valves are set on the water delivery pipe A210 and the water delivery pipe B209, and the seawater can only flow from the hydraulic cylinder 204 to the mixing tank 207, but not in the opposite direction. flow, the piston rod 214 moves downward, the pressure in the hydraulic cylinder 204 decreases, and seawater is poured into the hydraulic cylinder 204 from the water inlet pipe 203 .

Main technical indicators: The installed capacity of the invention is 10kW, and the power generation capacity reaches 5kW level, the wave energy conversion rate is higher than 15%, and the total power generation reaches 200kW·h after continuous operation for 10 hours.

Example 2

Except following difference, other is with embodiment 1.

The buoyancy tank 103 is a hollow structure, which can be filled with appropriate amount of seawater or sand for counterweight according to the sea conditions, so as to make the entire power generation device sink to a certain depth below the water surface, and the float 201 can vibrate up and down at a suitable position, and at the same time can ensure The stability of the power generation plant as a whole during operation. The fixed system I has a simple structure and flexible counterweight, which improves the stability and reliability of the entire power generation device, facilitates processing and implementation, and is economical.

The buoyancy tank 103 provides a downward pulling force through its own weight and the counterweight of the sand in the tank, so that the entire power generation device can be immersed in a certain depth of the seabed, so that the float 201 moves up and down along the vertical column 102, and the water inlet pipe 203 is inserted below the water surface . At the same time, the buoyancy tank 103 also provides a certain buoyancy. When the wave height is small, the relative movement between the buoy 201 and the column 102 can also be performed, that is to ensure that the buoy 201 is always in a working state.

Example 3

Except following difference, other is with embodiment 1.

As shown in FIG. 5 , the float 201 is a hollow cylinder with an inverted conical bottom. The structure of the buoy 201 is conducive to collecting more wave energy, and its inner hollow can be loaded with counterweight according to sea conditions. The surface layer of the float 201 is coated with anti-corrosion paint to prevent corrosion by seawater.

Claims (5)

1. the combined oscillating floater Wave energy electric generator of hydraulic type comprises power generation system and fixed system, it is characterized in that,

Described fixed system comprises buoyancy tank and fixing frame, and fixing frame is cube structure, and it is fixedly connected on the buoyancy tank top, and the fixing frame top arranges crossbeam, and four jiaos of fixing frame sides arrange respectively column, and column is the quadrangular structure;

Described power generation system comprises float, energy conversion device and energy output device, float is set on the column of fixing frame side, move up and down along column, float top and bottom be respectively equipped with four identical in order to limit the guiding device of float horizontal motion, described energy conversion device comprises mixing tank, oil hydraulic motor is with four groups identical, be arranged at respectively the fluid drive mechanism on four corner posts of fixing frame side, mixing tank and oil hydraulic motor are arranged on the crossbeam of fixing frame, fluid drive mechanism comprises oil hydraulic cylinder, intake pipe, conduit pipe A and conduit pipe B, four sides of every root post are respectively equipped with an oil hydraulic cylinder, oil hydraulic cylinder is positioned at the float top, its socket end is fixedly connected with column, and its piston rod is fixedly connected with float by the supporting frame of guiding device; Intake pipe one end stretches in the seawater, and the other end is communicated in the water intake of oil hydraulic cylinder sleeve; Conduit pipe A one end is communicated in the water outlet of oil hydraulic cylinder sleeve, and the other end is communicated in conduit pipe B, and conduit pipe B one end is communicated in the outlet of conduit pipe A, and the other end is communicated in the water inlet of mixing tank.The water outlet of mixing tank is communicated with the water intake of oil hydraulic motor, and the water outlet of oil hydraulic motor arranges waste pipe, is equipped with one-way valve on described intake pipe, conduit pipe A, conduit pipe B and the discharge tube; Described energy output device is arranged on the crossbeam of fixing frame, and its input end is connected with the output terminal of oil hydraulic motor.

2. Wave energy electric generator according to claim 1 is characterized in that, described guiding device comprises upper saw pulley and supporting frame; Supporting frame is fixed on the float, and the wheel shaft of upper saw pulley is fixed on the supporting frame, the column contacts side surfaces of upper saw pulley and described fixing frame.

3. Wave energy electric generator according to claim 1 is characterized in that, described energy output device is generator.

4. Wave energy electric generator according to claim 1 is characterized in that, described buoyancy tank is hollow-core construction.

5. Wave energy electric generator according to claim 1 is characterized in that, described float is the hollow cylinder that the bottom is inverted cone.

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