CN110469447B - Moon pool array floater wave energy conversion device adaptive to sea conditions - Google Patents
Moon pool array floater wave energy conversion device adaptive to sea conditions Download PDFInfo
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- CN110469447B CN110469447B CN201910610291.9A CN201910610291A CN110469447B CN 110469447 B CN110469447 B CN 110469447B CN 201910610291 A CN201910610291 A CN 201910610291A CN 110469447 B CN110469447 B CN 110469447B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
- F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
- F03B13/14—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy
- F03B13/16—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem"
- F03B13/18—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore
- F03B13/1845—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom slides relative to the rem
- F03B13/1875—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom slides relative to the rem and the wom is the piston or the cylinder in a pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B15/00—Controlling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
The invention belongs to the technical field of ocean wave energy power generation, and particularly relates to a moon pool array floater wave energy conversion device adaptive to sea conditions. Compared with the traditional application, the automatic replacing method of the floater achieves automatic replacing of the floater, shortens replacing period, and solves the problem that the floater is difficult to replace underwater. According to the invention, the moon pool array floater is better coupled with sea conditions by changing the working mode of the hydraulic cylinder floater, so that the wave energy conversion power is improved, and meanwhile, the accuracy and the integrity of application data are better ensured. The invention realizes the automatic replacement function of the hydraulic cylinder floater through the hydraulic drive control module, realizes the parameter comparison among experimental variables, can effectively save the replacement period which can avoid waste in the actual work, can also obtain accurate test information record through the GPS positioning module, and provides double guarantee for the precision of the moon pool in the actual application.
Description
Technical Field
The invention belongs to the technical field of ocean wave energy power generation, and particularly relates to a moon pool array floater wave energy conversion device adaptive to sea conditions.
Background
Since the ocean area on the earth accounts for about 71.8% of the earth surface, scientific exploration is not limited to the land surface on which people live, besides, with the improvement of science and technology, the energy consumption per capita is continuously increased, the exploration of ocean resources is also a research with profound significance, and the supply and consumption of ocean energy sources, namely, generators in ocean exploration, are problems to be solved urgently, in the past, the traditional offshore self-generating device has the advantages of low power generation, less voltage storage, large volume, difficult part replacement and limited structure installation to a certain extent, and the application of the offshore device for self-sufficiency cannot be guaranteed to provide a series of guarantees.
At present, the most effective and simple way for supplying offshore energy is conversion of wave energy, the wave energy is mainly derived from wind energy above the sea surface, and the transfer rate of the wave energy depends on the magnitude of wind speed and the acting force and the acting area of wind and seawater. When the water mass of the sea surface wave moves from the original position to other positions, potential energy is generated under the action of gravity. Furthermore, the water particles are in motion, i.e. there is kinetic energy. The energy that the waves have is the sum of potential energy and kinetic energy.
According to data of a coastal marine observation station in China, the theoretical average power of wave energy can be obtained in coastal areas, so that the wave energy has very high kinetic energy and potential energy, and how to effectively improve the energy conversion form is also a main research hotspot, and has important reference significance for the research of offshore energy devices.
Theoretical research of wave energy conversion at the present stage has been substantially developed, but the wave energy conversion cannot be timely complemented with theories in practical application, and a fundamental solution of the wave energy problem is a nonlinear problem caused by hydrodynamic coefficients generated by depending on changeable sea condition environments. According to the working principle that wave energy is captured by a wave energy device, the existing wave energy device can be divided into an oscillating water column type, a wave-crossing type and a wave-excited floating body type. The moon pool array floater belongs to a working mode of an oscillating water column type, and is convenient to install and detect and also convenient to transmit electric energy.
The patent with the application number of 201610293268.8 discloses a wave energy power generation device with a funnel-shaped moon pool structure, which comprises a moon pool device, a floating body device and a power generation device, wherein the floating body device arranged in the moon pool generates heaving motion to drive the power generation device to generate power. However, in practice, due to the influence of multiple environmental factors such as weather, seasons, wind waves and the like, the coupling power difference between different floater structures and wave energy is large, so that the wave energy conversion device is required to be used in accordance with variable sea condition environments, and therefore, the improvement of the coupling between the moon pool array floater and the sea condition information is an important problem to be solved urgently for improving energy conversion.
Meanwhile, when the large-size moon pool array floater is replaced when necessary, the underwater construction difficulty is high, the onshore disassembly period is long, and the tightness of the large-size moon pool array floater is required to be detected again no matter the floater is replaced underwater on water. Such problems are therefore critical to hinder the generation of electricity from wave energy.
In addition, in the past practical application, under various condition factors such as the disassembly of the device, the climate, the environment, the wind wave and the like, the traditional wave energy device can not record accurate specific position and sea condition information, and the frequency of artificial measurement is frequent, the measurement is unstable, the artificial error is large, and the accuracy of the precision can not be guaranteed, so that an effective solution capable of being well linked with actual data is needed.
Disclosure of Invention
The invention aims to provide a moon pool array floater wave energy conversion device capable of realizing automatic floater replacement and changing the working mode of a hydraulic cylinder floater according to sea conditions.
The purpose of the invention is realized by the following technical scheme: the device comprises a motion actuating mechanism and a floating body device which are arranged in a moon pool, and also comprises a hydraulic pump and a hydraulic pipeline container; the hydraulic pump is arranged above the moon pool and is connected to the hydraulic pipeline container through two hydraulic oil conveying oil pipes; the hydraulic pipeline container is arranged between the bottom of the motion actuating mechanism and the floating body device; the interior of the floating body device contains a plurality of hydraulic cylinder floaters, and the hydraulic cylinder floaters are in watertight connection with the bottom surface of the floating body device; the hydraulic cylinder floater is internally provided with a hydraulic piston for dividing the inner space of the hydraulic cylinder floater, the hydraulic piston is fixed with the top surface of the floater accommodating device through a guide rod, and two parts of spaces divided by the hydraulic piston are respectively connected to a hydraulic pipeline container through pipelines.
The present invention may further comprise:
the remote control center is also included; and all pipelines of the hydraulic cylinder floater connected to the hydraulic pipeline container are provided with limit switch control valves controlled by a remote control center.
And a GPS receiver capable of transmitting data to a remote control center is arranged above the moon pool.
The moon pool is of a double-layer thin-wall structure.
The motion actuating mechanism comprises a first sleeve, a second sleeve and a third sleeve, the first sleeve, the second sleeve and the third sleeve are sequentially connected, wherein the radius of the first sleeve is smaller than that of the second sleeve, and the radius of the second sleeve is smaller than that of the third sleeve.
The invention has the beneficial effects that:
compared with the traditional application, the automatic replacing method of the floater achieves automatic replacing of the floater, shortens replacing period, and solves the problem that the floater is difficult to replace underwater. According to the invention, the moon pool array floater is better coupled with sea conditions by changing the working mode of the hydraulic cylinder floater, so that the wave energy conversion power is improved, and meanwhile, the accuracy and the integrity of application data are better ensured. The invention realizes the automatic replacement function of the hydraulic cylinder floater through the hydraulic drive control module, realizes the parameter comparison among experimental variables, can effectively save the replacement period which can avoid waste in the actual work, can also obtain accurate test information record through the GPS positioning module, and provides double guarantee for the precision of the moon pool in the actual application.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a data transmission flow diagram of the present invention.
Fig. 3 is a schematic view of the float structure of the hydraulic cylinder of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, a moon pool array float wave energy conversion device adaptive to sea conditions, which is one of oscillating water column type wave energy conversion devices, can realize the advantages of theoretical foundation replacement and automation of replacement of floats, and comprises a GPS receiver 3, a float device 10 serving as a float storage module, a motion actuator 6, a hydraulic drive control module, a moon pool and a remote control center.
The operating principle of the moon pool array device is that when incident waves fluctuate in height, the gas in the cavity is subjected to continuous compression and release cyclic action, and then a hydraulic cylinder floater in the moon pool cavity can fluctuate along with a wave surface, so that the floater pushes an actuating mechanism to generate heave motion, and the conversion process of the wave energy power generation device is realized. After the working mode is selected, the double-layer thin wall 7 of the moon pool can form wave vortex in a limited space, and collect more wave energy to realize wave convergence. Wave energy does work on a hydraulic cylinder floater in a working mode, and wave force pushes the floating body device 10 to be transmitted to the motion executing mechanism through the hydraulic guide rod. The movement executing mechanism 6 comprises a first sleeve, a second sleeve and a third sleeve, wherein the radius of the first sleeve is smaller than that of the second sleeve, the radius of the second sleeve is smaller than that of the third sleeve, the sleeves are connected through a circular ring, and the relative movement between the sleeves generates wave energy to generate electricity. The actuating mechanism contains two rubber hydraulic oil conveying oil pipes.
The remote control center is used for receiving corresponding working states and issuing instructions, and can observe the working mode of the moon pool, power generation information, sea condition information and GPS related information; and when the environment coupling is required to be switched, issuing a corresponding control instruction. The remote control center improves the remote control capability, realizes semi-automatic operation, and saves manpower and material resource arrangement.
The moon pool is of a double-layer thin-wall structure, and aims to collect waves and avoid energy dissipation in a closed environment and improve internal and external pressure difference generated in a working environment. The double-layer thin wall 7 of the moon pool is made of stainless steel, and the stainless steel is adopted because light reflection is formed between the movement of seawater and the thin wall, so that collision of underwater organisms is avoided, and the reliability of the device is guaranteed.
The hydraulic drive control module comprises a hydraulic control box 1, a hydraulic pump 2, a rubber hydraulic pipeline and a data transmission station. The hydraulic pump 2 is fixed in the hydraulic control box 1, and the hydraulic control box 1 is connected with the moon pool upper cover 4. The hydraulic drive control module is used as a power source to convey hydraulic oil, corresponding tasks are distributed after the hydraulic drive control module receives a command of the remote control center through the data transmission station, and a hydraulic floater pipeline is opened and closed. The hydraulic drive control module and the GPS receiver can transmit data through a data transmission radio station, the hydraulic drive control module can open and close two oil pipe channels of a hydraulic cylinder floater, and a hydraulic pump starts to be started to be used as a power source to convey hydraulic oil and simultaneously distribute corresponding hydraulic oil transmission tasks to report the tasks after the transmission of the tasks is finished.
The hydraulic cylinder floater changes the working mode through the change of hydraulic oil in the cylinder, wherein the hydraulic cylinder floater comprises a limit switch control valve at the joint of an oil pipe, and the limit switch control valve is controlled by a data transmission radio of a hydraulic drive control module, so that the hydraulic cylinder floater overcomes the sea condition difference caused by various conditions, is better coupled with a hydrodynamic coefficient, and improves the power generation conversion power, wherein the number of the hydraulic cylinder floaters is at least 2-3, and preferably 8.
The floater device 10 is internally accommodated with a plurality of hydraulic cylinder floater structures, and has the advantages of forming a good sealing space, ensuring the sealing performance of the structure, and simultaneously accommodating the structure with the polygonal bodies 9 for supporting two hydraulic oil pipelines of each floater, thereby providing guarantee for the sealing and the storage of hydraulic oil. The hydraulic guide rod 12 in each hydraulic cylinder float is fixed on the top surface of the floating body device. The hydraulic cylinder floater which does not work is arranged in the floating body device and is flush with the bottom of the floating body device, and the hydraulic cylinder floater is in watertight connection with the bottom surface of the floating body device. In the working mode, the floater of the hydraulic cylinder extends out of the bottom surface of the floating body device and is in contact with the sea waves below.
Each hydraulic cylinder floater comprises two hydraulic channels, namely a floater ascending channel 14 and a floater descending channel 15, an oil hole in the outer wall of the hydraulic cylinder floater is connected with the floater ascending channel 14, and a hydraulic piston 16 in the hydraulic cylinder is connected with the floater descending channel 15. The oil delivery pipelines connected with the two hydraulic channels of the hydraulic cylinder floats are connected to a hydraulic pipeline container 17, and the pipelines of all the hydraulic cylinder floats are integrated in the hydraulic pipeline container and then are connected with the two oil pipes in the motion executing mechanism.
The GPS receiver is magnetically connected with the upper end of the moon pool upper cover 4; the motion executing mechanism 6 is welded with the lower end of the upper cover of the moon pool; the hydraulic control box 1 is connected with the upper end of the moon pool upper cover through a hinged hole bolt; the two cuboid moon pool carrying platforms 5 are connected with the upper end of the moon pool upper cover through a hinged hole bolt.
The GPS receiver collects and reports actual working geographic position information, records relevant experimental information time, and can obtain accurate current-day sea state information through online inquiry, so that the accuracy of application information is guaranteed, wherein the data transmission radio station reports and receives the recorded information (position information, time information and working state information) content of the remote control center, and the integrity and the accuracy of information transmission are guaranteed through accurate data collection and perfect data transmission.
As shown in fig. 2, the remote control center issues a control command to the hydraulic drive control module through the data transmission radio station, the hydraulic drive control module changes the working state of the hydraulic cylinder floater after receiving the command, the limit switch control valve of the hydraulic cylinder floater returns to the information state, and the control command is returned to the remote control center through the data transmission radio station of the hydraulic drive control module after the hydraulic cylinder completes the command action. And when the hydraulic cylinder floater finishes the instruction action, the hydraulic cylinder floater enters a working mode, the hydraulic cylinder floater transmits the hydraulic cylinder floater to the motion executing mechanism through the action of wave energy, the work related parameters are reported to the remote control center, and meanwhile, the GPS receiver returns corresponding data to the remote control center in real time.
The specific implementation process is as follows.
In the first stage, a remote control center is started and issues an initialization working mode, namely all hydraulic cylinder floats of the moon pool array float wave energy conversion device adaptive to sea conditions are set to be in a rising state, a GPS receiver starts to work and sends received information, and the remote control center combines received GPS position information, time information and float working state information with predicted sea condition information of a China meteorological network to determine and select an optimal working mode.
The remote control center issues a selected working mode, the hydraulic drive control module starts a limit switch control valve needing to replace the floater state of the hydraulic cylinder after receiving corresponding instruction information, the hydraulic pump is driven to work by voltage converted by original wave energy, the hydraulic pump changes the working state of the floater of the hydraulic cylinder through an oil pipe, and as the oil port sensor of each hydraulic cylinder floater prompts information to finish switching action, the limit switch control valve of the corresponding hydraulic cylinder floater is closed after the hydraulic pump finishes action, and action finishing information and the working state are reported.
Two hydraulic oil pipes corresponding to each hydraulic cylinder floater are installed in two modes, the first mode can penetrate through the polygonal body through the hole of the movement executing mechanism, and the second mode is that the corresponding hydraulic oil pipes are laid inside the polygonal body and directly connected with a hydraulic pump at the bottom of the executing mechanism. The oil pipe channels of other hydraulic cylinders can be arranged randomly according to the two installation modes.
As shown in fig. 1 and 3, the hydraulic cylinder guide rod 12 and the hydraulic piston 16 are provided with a hydraulic oil pipe passage, which is a float descending passage 15, on the hydraulic piston 16, and a nut oil pipe passage, which is a float ascending passage 14, on the right side of the upper portion of the hydraulic cylinder 13. Because the hydraulic pump is connected with each hydraulic cylinder floater through two channels, when the first channel 8 conveys hydraulic oil to work, the second channel 11 is in a hydraulic oil recovery working state, at the moment, the floater ascending channel 14 starts to inject the hydraulic oil, the hydraulic oil in the floater descending channel 15 returns to the hydraulic pump through the second channel 11, when the second channel 11 is in a conveying mode, the first channel 8 is in a recovery mode, at the moment, the hydraulic cylinder floaters are in a descending mode, when a plurality of floaters need to be replaced, corresponding pipeline interfaces are sequentially opened, the working states of the first channel 8 and the second channel 11 are coordinated, and after the replacement action is finished, relevant data are reported, recorded and collected.
According to sea condition information fed back by a GPS receiver to a remote control center, when the number of floats of a working hydraulic cylinder is optimally calculated to be 3 through analysis, the remote control center sends a working mode that the descending working number of the hydraulic cylinder is 3, a hydraulic channel opposite to the floats of the hydraulic cylinder is opened by a hydraulic pump 2 of a hydraulic drive control system, a first channel 8 is set to be a conveying working mode, a second channel 11 is a recovery working mode, hydraulic oil is injected into an ascending channel of the hydraulic cylinder at the moment, the hydraulic oil is returned to the hydraulic pump through the second channel 11 by the descending channel, when a hydraulic valve of the floats of the hydraulic cylinders receives an alarm system, the corresponding ascending or descending channel is closed, after the working is finished, a PC is reported, the floats of the hydraulic cylinders are replaced, and the first channel 8, the second channel 11 and the.
After the first switching mode is finished, the remote control center displays the working state (the motion executing mechanism, the hydraulic drive control module and the GPS positioning module) and the power generation information among the modules, the real-time monitoring function is achieved by reporting the information among the modules, and meanwhile, the received information is fitted with the moon pool array floater in real time, so that the continuous and efficient power generation state of the device is guaranteed.
Compared with the prior art, the invention has the following effects that in practical application, due to the change of hydrodynamic coefficients caused by a series of environmental changes such as geographical position, ocean monsoon environment, morning and evening difference, seasonal difference and the like, the moon pool array floater is better coupled with the sea state by changing the working mode of the hydraulic cylinder floater, and the power generation power of the wave energy conversion device is improved. Meanwhile, the hydraulic control device can realize the automatic replacement function of the cylindrical floater, realize parameter comparison among experimental variables, effectively save the replacement period which can avoid waste in actual work, and obtain accurate test information records through the GPS positioning module, thereby providing double guarantee for the precision of the moon pool in actual application. The mechanism device has the connection modes of fixed welding, reamed hole bolt connection and a corresponding support structure, can work in multi-stage sea area stormy waves, and has the advantages of high support strength, convenience in mounting and dismounting, strong automation capability, accurate information recording and complete logic execution framework.
Compared with the traditional application, the invention realizes the automatic replacement of the floater, shortens the replacement period, overcomes the difficulty of replacing the floater underwater, better couples the information of the sea condition by inquiring and recording the sea condition after receiving the GPS positioning information, realizes the self-adaptive moon pool array floater device, improves the wave energy conversion power, and better ensures the accuracy and the integrity of the application data.
The invention solves the problems that the wave energy power generation device in the prior art is low in power generation power due to various factors such as seasons, climate, wind waves and the like, and cannot provide an optimal solution according to environmental changes, and also solves the problems that the floater is difficult to replace, the replacement period is long and the like under different sea conditions in practical application.
The wave energy device with the array floats in the moon pool is influenced by sea condition environments, geographical positions and seasonal factors in practical application, so that the difference of relevant hydrodynamic coefficients of the wave energy is obvious, and meanwhile, under severe sea conditions, the floats are designed in advance to bear high-pressure wave energy to do work, so that float parts are invalid, the design of the array floats enables the average wave force borne by each float under severe deep sea and extreme weather to be reduced, the work of the moon pool is guaranteed, and meanwhile, the work power of wave energy conversion is improved under the high-grade marine environment.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. A moon pool array floater wave energy conversion device adaptive to sea conditions comprises a motion actuating mechanism and a floating body device which are arranged in a moon pool, and is characterized in that: the hydraulic pump and the hydraulic pipeline container are also included; the hydraulic pump is arranged above the moon pool and is connected to the hydraulic pipeline container through two hydraulic oil conveying oil pipes; the hydraulic pipeline container is arranged between the bottom of the motion actuating mechanism and the floating body device; the interior of the floating body device contains a plurality of hydraulic cylinder floaters, and the hydraulic cylinder floaters are in watertight connection with the bottom surface of the floating body device; the hydraulic cylinder floater is internally provided with a hydraulic piston for dividing the internal space of the hydraulic cylinder floater, the hydraulic piston is fixed with the top surface of the floater accommodating device through a guide rod, and two parts of spaces divided by the hydraulic piston are respectively connected to a hydraulic pipeline container through pipelines; the remote control center is also included; the hydraulic cylinder floater is connected to all pipelines of the hydraulic pipeline container and is provided with a limit switch control valve controlled by a remote control center; a GPS receiver capable of transmitting data to a remote control center is arranged above the moon pool; the moon pool is of a double-layer thin-wall structure; the motion actuating mechanism comprises a first sleeve, a second sleeve and a third sleeve, the first sleeve, the second sleeve and the third sleeve are sequentially connected, wherein the radius of the first sleeve is smaller than that of the second sleeve, and the radius of the second sleeve is smaller than that of the third sleeve.
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| CN109882343A (en) * | 2019-04-23 | 2019-06-14 | 哈尔滨工程大学 | A kind of moon pool oscillating water column Wave energy electric generator based on floating breakwater |
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