CN219119373U - Novel point absorption type ocean wave energy power generation device - Google Patents
Novel point absorption type ocean wave energy power generation device Download PDFInfo
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- CN219119373U CN219119373U CN202223032199.5U CN202223032199U CN219119373U CN 219119373 U CN219119373 U CN 219119373U CN 202223032199 U CN202223032199 U CN 202223032199U CN 219119373 U CN219119373 U CN 219119373U
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- 238000010248 power generation Methods 0.000 title claims abstract description 128
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Abstract
A novel point absorption type ocean wave energy power generation device belongs to the field of wave energy power generation devices. The self-adaptive damping adjusting device comprises a wave absorbing device, a hydraulic transmission device, a friction nano generator, a fixing device and a self-adaptive damping adjusting device; the oscillating floater of the wave absorbing device moves up and down along with the waves; the hydraulic transmission device transmits a hydraulic signal to the hydraulic motor through a hydraulic pipeline and an energy accumulator, and changes the relative reciprocating motion of the wave absorbing device and the fixing device into rotary motion; the main shaft of the friction nano generator is driven by the rotating shaft of the hydraulic motor to rotate, rub and generate electricity; the damping self-adaptive adjusting device comprises various sensors, a decision module device and a control module device. According to the utility model, a friction nano power generation technology is introduced, a self-adaptive damping-variable wave power generation device is designed, interference factors under various wave states are weakened, and the power generation efficiency in a wave power generation working interval and a low-frequency wave state is increased.
Description
Technical Field
The utility model relates to the field of wave energy power generation devices, in particular to a self-adaptive variable damping wave energy power generation device based on a friction nano power generation technology.
Background
As the world's energy demand increases, wave energy becomes an important component of renewable energy. Wave energy has great power generation potential and also faces serious challenges. Thus accelerating the development of ocean wave energy resources with national and social needs.
The power generated by the wave energy power plant is directly related to the frequency of the incident waves and the magnitude of the damping of the system. The best-match damping of the system varies with the frequency of the incident wave. Wave height, wavelength and frequency of waves in the ocean are random, resulting in unstable and discontinuous wave energy. Once the existing wave energy power generation device is manufactured, the damping coefficient of the power generation device is determined, and the damping coefficient and the frequency of incident waves cannot always be kept in an optimal matching state, so that further improvement of the power generation power of the power generation device is affected.
There is currently a large amount of low frequency wave motion in the offshore environment, but current wave energy power generation devices are mostly based on electromagnetic generators. The working state of the generator is fixed, and more low-frequency wave motion is difficult to capture, so that a great deal of ocean wave energy is wasted.
Disclosure of Invention
The utility model aims to solve the technical problems that the system damping and the incident wave frequency of the existing wave energy power generation device cannot always keep the optimal matching state, the low-frequency wave motion capturing difficulty is high, the working state is single and the like, and provides a novel point absorption type ocean wave energy power generation device which adopts a friction nano generator and a hydraulic transmission device, so that the low-frequency capturing property of the wave energy power generation device and the self-adaptive multi-power generation state under different wave states can be enhanced on the basis of ensuring the reliability of the point absorption type wave energy power generation device. The following presents a simplified summary of the utility model in order to provide a basic understanding of some aspects of the utility model. It should be understood that this summary is not an exhaustive overview of the utility model. It is not intended to identify key or critical elements of the utility model or to delineate the scope of the utility model.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
a novel point absorption type ocean wave energy power generation device comprises a wave absorption device, a hydraulic transmission device, a friction nano generator and a fixing device;
the wave absorbing device comprises an oscillating floater and a floating ring, wherein the damping limiting device is positioned on the water surface and fixed on the outer side of the oscillating floater;
the hydraulic transmission device comprises a hydraulic cylinder, an energy accumulator, an oil tank, a hydraulic motor, a valve element group and a hydraulic pipeline which are arranged in the oscillating floater; the valve element group comprises a one-way valve and an overflow valve which are positioned among the hydraulic elements;
the hydraulic cylinder is a unidirectional hydraulic cylinder and is positioned at the joint of the wave absorbing device and the fixing device, a hydraulic rod of the hydraulic cylinder is connected with the upper end of the fixing device, so that the relative motion of the wave energy absorbing device and the fixing device can be converted by the hydraulic cylinder, the energy accumulator and the oil tank are both positioned in the floating device, an inlet and an outlet of the hydraulic motor are connected by a hydraulic pipeline, a rotating shaft of the hydraulic motor is connected with a main shaft of the friction nano generator, and the generated power is used as a power source of the friction nano generator;
the friction nano generator comprises a plurality of power generation units, a main shaft, an electromagnetic clutch and a waterproof shell, wherein the power generation units are disc-shaped and are composed of two adjacent friction nano power generation material discs, the main shaft is positioned at the center of the power generation units, the main shaft connects the power generation units, the electromagnetic clutch is arranged between the two power generation units, the waterproof shell is positioned at the outer side, and the power generation units, the main shaft and the electromagnetic clutch are protected;
the fixing device comprises an anchoring disc, a connecting rod and an anchor chain, wherein the connecting rod is positioned at the upper end of the anchoring disc and connected with the hydraulic transmission device, one end of the anchor chain is positioned at the lower end of the anchoring disc, and the other end of the anchor chain is anchored at the sea bottom.
The hydraulic transmission device comprises a hydraulic cylinder, an oil tank, an energy accumulator and a hydraulic motor; wherein,,
the hydraulic cylinder is a one-way hydraulic cylinder and is positioned at the joint of the lower cavity of the wave absorbing device and the fixing device and used for converting mechanical energy of reciprocating motion into hydraulic energy;
the oil tank is fixed at the lower side of the inner part of the oscillating floater and is used for storing hydraulic oil;
the energy accumulator is positioned at the lower side of the inner part of the oscillating floater and is used for temporarily storing hydraulic oil and maintaining the stability of the system;
the hydraulic motor is positioned in the oscillating floater, and an output shaft of the hydraulic motor is connected with a main shaft of the friction nano generator to convert hydraulic energy into mechanical energy.
According to the scheme, the damping limiting device comprises a fixed disc, a damping spring and a sliding disc, wherein the fixed disc is installed inside a cavity of the oscillating floater, the upper end of the damping spring is connected with the fixed disc, and the sliding disc is installed at the lower end of the damping spring.
According to the scheme, the power generation unit comprises an upper friction medium, a lower friction medium, a main shaft and a power generation unit shell, wherein the upper friction medium and the lower friction medium are assembled coaxially, the upper friction medium is connected with the main shaft and can rotate along with the rotation of the main shaft, and the lower friction medium is fixed in the power generation unit shell and cannot rotate;
the electromagnetic clutch is used for connecting two adjacent power generation units, and controlling the power generation units to be connected with the main shaft for rotation or not by controlling the self-attraction or separation state, so that the work quantity of the power generation units is controlled;
according to different wave conditions, the main working area is divided into a short wave area, a medium wave area and a long wave area, when the wavelength of the incident wave changes, the working number of the power generation units of the generator changes accordingly, and the optimal matching between the system damping and the frequency of the incident wave is always kept.
According to the scheme, the hydraulic transmission device further comprises a valve element group, the valve element group comprises a one-way valve and an overflow valve, the one-way valve is arranged on the hydraulic pipeline and used for controlling the flow direction and the non-return effect, the overflow valve is arranged between the hydraulic pipeline and the oil tank, and the overflow valve is used for stabilizing the pressure of the pipeline and protecting unloading.
According to the scheme, the self-adaptive damping device comprises a plurality of sensors, a decision module device and a control module device, wherein the plurality of sensors are mainly positioned at each part of the device, and the decision module device and the control module device are arranged in the floater;
the various sensors comprise an oil flow sensor, a pipeline pressure sensor, a current sensor, a voltage sensor, a rotating speed sensor and a wave sensor, and are used for acquiring state data of a hydraulic system, a generator and waves; wherein,,
the oil flow sensor is used for collecting flow data of inlet and outlet water flows of the hydraulic cylinder and the hydraulic motor;
the pipeline pressure sensor is used for collecting pressure data of the hydraulic cylinder and the hydraulic motor;
the current sensor is used for collecting current data generated by each generating unit in the generating set;
the voltage sensor is used for collecting the generated voltage data of each power generation unit in the power generation unit;
the rotating speed sensor is used for collecting rotating speed data of a main shaft in the generator set;
the wave sensor is used for collecting wavelength data of incident waves;
the decision module device and the control module device are used for controlling the decision module device; wherein,,
the decision module device is used for analyzing the obtained sensor data, judging the current wave state and the device power generation amount, and carrying out adjustment planning on the power generation working state;
the control module device is used for controlling the working quantity of the power generation units of the friction nano-generator by controlling the switch of the electromagnetic clutch according to the adjustment plan, so as to realize the self-adaptive adjustment of the power of the generator.
According to the scheme, the various sensors comprise oil flow sensors arranged at the inlet end and the outlet end of each hydraulic element and are used for collecting oil flow data.
According to the above scheme, the various sensors comprise pipeline pressure sensors arranged at the inlet end and the outlet end of each hydraulic element and are used for collecting pressure data of the pipeline and the hydraulic element.
According to the scheme, the various sensors comprise current sensors and voltage sensors which are arranged on the power generation units and are used for collecting current and voltage data.
According to the scheme, the various sensors comprise a rotating speed sensor arranged on the main shaft and are used for collecting rotating speed data of the main shaft.
According to the scheme, the wave sensor comprises a wave sensor arranged on the outer side of the wave absorbing device and is used for collecting wavelength data of incident waves.
According to the scheme, the decision module device is used for analyzing the obtained sensor data, judging the current wave state and the power generated by the generator, and carrying out adjustment planning on the working state of the generator according to the wave state;
according to the scheme, the control module device is used for controlling the working quantity of the power generation units of the friction nano-generator by controlling the switch of the electromagnetic clutch according to the adjustment plan.
According to the scheme, the electromagnetic clutch is arranged on the main shaft between the two power generation units and is used for controlling whether the power generation units work or not.
The utility model also provides a working method of the novel point absorption type ocean wave energy power generation device, which comprises the following steps:
s1, first-stage energy conversion: the wave energy is converted into mechanical energy, the wave absorbing device converts the random motion of the waves into the relative reciprocating motion of the wave absorbing device and the fixing device, and the wave energy on the sea surface is converted into the mechanical energy of the device.
S2, second-stage energy conversion: the energy is converted into hydraulic energy by mechanical energy, the hydraulic cylinder converts the reciprocating motion of the hydraulic rod into hydraulic motion in the hydraulic pipeline, and the mechanical energy of the hydraulic cylinder is converted into hydraulic energy in the hydraulic pipeline.
S3, third-stage energy conversion: the energy is converted into electric energy by hydraulic energy, a rotating shaft of the hydraulic motor is directly connected with a main shaft of the friction nano generator, hydraulic motion in the hydraulic transmission device drives the friction nano generator to rotate, and the hydraulic energy of the hydraulic transmission device is converted into the electric energy of the friction nano generator.
S4, after the decision module device collects data of sensors such as the wave sensor, the data information is compared with preset working index information in real time, and the control module device is used for controlling the electromagnetic clutch switch of the friction nano generator, so that the working quantity of the power generation units is controlled, and the adjustment of various power generation powers of the generator is realized.
And S5, after the decision module device collects the sensor data, when the data information accords with the set extreme weather early warning information, the control module device controls the electromagnetic clutch between the friction nano generator and the hydraulic motor to realize motor cutting-out, so that the friction nano generator is prevented from being damaged.
And S6, after the decision module device collects the sensor data, when the data information is consistent with the fault information, the control module device controls the electric appliance clutch before the damaged power generation unit is disconnected, and the electric appliance clutch waits for manual maintenance.
S7, when the friction nano generator is manually maintained, the single damaged friction nano power generation unit is detached from the friction nano generator, the friction nano power generation unit in a good state can be installed immediately, and the damaged friction nano power generation unit is brought back to be maintained in the later period.
The utility model has the beneficial effects that:
1. self-adaptive variable damping: the friction generator set is formed by combining a plurality of power generation units of friction nano generators. According to wave energy conditions under different frequency (wavelength) conditions, the damping of the device can be adaptively changed, the optimal matching between the system damping and the frequency (wavelength) of the incident wave is always kept, and the highest power generated by the wave energy power generation device under various wave conditions is achieved.
2. Enhancing the low frequency capture of the power generation device: the device adopts a hydraulic transmission technology and a friction nano power generation technology, the hydraulic transmission has the characteristics of stable transmission, flexible speed regulation and the like, and the friction nano power generation technology has higher capturing efficiency on low-frequency wave energy. By combining the two, the capturing efficiency of the low-frequency wave energy is enhanced on the basis of ensuring the reliability of the device.
3. Reliability is improved and maintenance is easy: due to the complex environment of the ocean, the ocean power generation device needs to be overhauled and maintained regularly, only a hydraulic cylinder is arranged under water on vulnerable parts (a friction nano power generation unit, a hydraulic motor and the like) of the device, the friction power generation parts are all arranged above the water surface, and the sealing performance is enhanced by the design scheme of the joint absorption device. Because the power generation unit of the friction nano-generator is provided with the replaceable row, maintenance staff can more conveniently carry out maintenance or change parts, and the reliable operation of the device during the design life is ensured.
Drawings
FIG. 1 is an overall elevation view of the present utility model;
FIG. 2 is a cross-sectional view of the present utility model;
FIG. 3 is a schematic structural view of the friction nano-generator of FIG. 1;
FIG. 4 is a schematic view of the shock absorbing stop device of FIG. 2;
FIG. 5 is a schematic illustration of the hydraulic transmission of FIG. 1;
fig. 6 is a schematic diagram of the relationship between the self-adaptive working state and the wave state of the designed wave power generation device.
FIG. 7 is a graph comparing the power generated by a wave power generator with a fixed damping with the power generated by a wave power generator with adaptive damping;
FIG. 8 is a schematic diagram of a triboelectric power generation of a triboelectric nano-generator;
the feature names indicated by the reference numerals in the drawings are as follows:
100-wave absorbing device; 110-oscillating a float; 120-floating ring; 130-a shock absorption limiting device; 131-a fixed disk; 132-a shock-absorbing spring; 133-a sliding disc;
200-hydraulic transmission device; 210-a hydraulic cylinder; 220-accumulator; 230-an oil tank; 240-a hydraulic motor; 250-valve member set; 251-one-way valve; 252-overflow valve; 260 hydraulic lines;
300-friction nano generator; 310-a power generation unit 311-an upper surface friction medium; 312-lower surface friction medium; 313-power generation unit housing; 320-spindle; 330-electromagnetic clutch; 340 a waterproof housing;
400-fixing device; 410-anchoring discs; 420-connecting rod; 430-anchor chain;
500-damping adaptation means; 510-an oil flow sensor; 520-a pipeline pressure sensor; 530-a current sensor; 540-a voltage sensor; 550-a rotation speed sensor; 560 wave sensor; 570 decision module means; 580-control module arrangement.
Detailed Description
The present utility model is further illustrated below in conjunction with specific embodiments, it being understood that these embodiments are meant to be illustrative of the utility model only and not limiting the scope of the utility model, and that modifications of the utility model, which are equivalent to those skilled in the art to which the utility model pertains, will fall within the scope of the utility model as defined in the claims appended hereto.
In this embodiment, a friction nano generator is used, and the friction power generation principle is as shown in fig. 8, where the friction nano generator includes an upper structure and a lower structure, the upper structure includes an electrode plate supporting electrode plate and a friction layer a, the lower structure includes a friction layer B and a second conductive electrode plate, and the friction layer a and the friction layer B generate friction through the rotational movement of the upper structure and the lower structure, and a potential difference is generated by using the friction, so as to further realize power generation.
The embodiment discloses a novel point absorption type ocean wave energy power generation device, which comprises a wave absorption device 100, a hydraulic transmission device 200, a friction nano generator 300 and a fixing device 400;
the wave absorbing device 100 comprises an oscillating buoy 110, a floating ring 120 and a damping limiting device 130, wherein the floating ring 120 is made of light plastic and is fixed on the outer side of the oscillating buoy 110, the size and thickness of the floating ring can be adjusted according to the whole mass of the wave power generating device, and the damping limiting device 130 is arranged inside the lower side of the oscillating buoy 110.
In this embodiment, the oscillating buoy 110 is of a hollow structure, the oscillating buoy 110 is of a rotating body structure, the main body is of a funnel shape with a large upper part and a small lower part, and the main body is made of a light water corrosion resistant alloy, because the power generation device needs to float on the water surface by means of buoyancy in operation, the whole weight needs to be light, meanwhile, the working environment of the oscillating buoy is located near the sea surface, the adopted material needs to be resistant to seawater corrosion, the oscillating buoy 110 is of a rotating body structure, and thus the oscillating buoy floats on the water surface by means of buoyancy.
Preferably, the maximum diameter of the upper end of the oscillating buoy 110 is 7.0m, and the total height is 10m.
The hydraulic transmission 200 is installed in the oscillating buoy 110 and includes a hydraulic cylinder 210, an accumulator 220, a tank 230, a hydraulic motor 240, a valve element group 250, and a hydraulic line 260. The hydraulic cylinder 210 is fixed to the lower portion of the oscillating buoy 110, wherein a hydraulic rod is connected to a fixing device 400, and an accumulator 220, an oil tank 230 and a hydraulic motor 240 are all fixed inside the oscillating buoy, and a valve element group 250 including an overflow valve 252 and a check valve 251 is installed on a hydraulic line 260 between respective hydraulic elements.
In the hydraulic power transmission device 200, the connection relationships of the respective structures are: the upper port of the hydraulic cylinder 210 is connected with a first three-way pipe fitting 211, one end of the first three-way pipe fitting 211 is connected with a first one-way valve 212, when the piston in the hydraulic cylinder 210 moves upwards, hydraulic oil is pressed into a subsequent hydraulic system, and meanwhile, the hydraulic oil is prevented from flowing back to the hydraulic cylinder;
the upper port of the hydraulic cylinder 210 is connected with a first three-way pipe fitting 211, one end of the first three-way pipe fitting 211 is connected with a one-way valve 212, when the piston in the hydraulic cylinder 210 moves downwards, hydraulic oil is sucked from the oil tank 230, and meanwhile, the hydraulic oil is prevented from flowing back to the oil tank;
the lower port of the hydraulic cylinder 210 is connected with a second three-way pipe 213, one end of the second three-way pipe 213 is connected with a one-way valve 251, when the piston in the hydraulic cylinder moves upwards, hydraulic oil is sucked from the oil tank 230, and meanwhile, the hydraulic oil is prevented from flowing back to the oil tank;
the lower port of the hydraulic cylinder 210 is connected with a second three-way pipe fitting 213, one end of the second three-way pipe fitting 213 is connected with a second one-way valve 214, when the piston in the hydraulic cylinder 210 moves downwards, hydraulic oil is pressed into a subsequent hydraulic system, and meanwhile, the hydraulic oil is prevented from flowing back to the hydraulic cylinder;
the first check valve 212 and the second check valve 214 are connected to the rear end sensor (oil flow sensor 510, line pressure sensor 520) through a third three-way pipe 215, and then the accumulator 220 is connected.
A fourth three-way pipe fitting 216 is connected behind the accumulator 220, one end of the three-way pipe fitting of the fourth three-way pipe fitting 216 is connected with an overflow valve 252, the rear end of the overflow valve 252 is connected with an oil tank 230 for protecting a hydraulic circuit, the other end of the fourth three-way pipe fitting 216 is connected with a hydraulic motor 240, a first throttle valve 217 is arranged on a connecting pipeline of the fourth three-way pipe fitting 216 and the hydraulic motor 240, a second throttle valve 218 is connected behind the hydraulic motor 240, and a first oil tank 219 is connected behind the second throttle valve 218.
The friction nano generator comprises a power generation unit 310, a main shaft 320, an electromagnetic clutch 330 and a waterproof housing 340, wherein the power generation unit 310 and the electromagnetic clutch 330 are concentrically and axially assembled on the main shaft 320, the waterproof housing 340 is positioned at the outermost side, and the waterproof housing is mainly used for preventing water from entering the oscillating buoy 110 and damaging internal working parts.
Preferably, the total height of the friction nano generator 300 is 3.0m, the diameter is 2.0m, and the height of the single friction nano generating unit 310 is 0.6m.
The fixture 400 includes a mooring disc 410, a linkage 420, and a chain 430. The upper end of the anchor disc 410 is fixedly connected with a connecting rod 420, and the lower end is fixedly connected with an anchor chain 430. The mooring chain 430 is anchored in the seabed plane and mainly serves to stabilize the fixture 400, and the mooring disc 410 mainly generates a resistance force during the movement by its own shape so that the wave absorbing device 100 and the fixture 400 generate a stable relative movement.
The damping adaptation device 500 comprises various sensors, decision module means 570 and control module means 580, all fixedly mounted inside the oscillating buoy 110. The decision module 570 is an STM32 single-chip microcomputer.
Preferably, chain 430 is formed from a 150mm diameter steel cable.
The damping limiting device 130 comprises a fixed disc 131, a damping spring 132 and a sliding disc 133, wherein the fixed disc 131 is installed inside a cavity of the oscillating buoy 110, the upper end of the damping spring 132 is connected with the fixed disc 131, the sliding disc 133 is installed at the lower end of the damping spring 132, and the impact and vibration of the connecting rod to the hydraulic cylinder are relieved by the spring.
The power generation unit 310 includes an upper friction medium 311, a lower friction medium 312, and a power generation unit housing 313, all of which are coaxially assembled on the spindle 320, the upper friction medium 311 is fixedly connected with the spindle 320, and the lower friction medium 312 is fixed in the power generation unit housing 313.
The oil flow sensor 510 is mounted on the hydraulic line 260 at the inlet and outlet ends of each hydraulic component in the hydraulic transmission 200 for collecting oil flow data.
The line pressure sensors 520 are mounted on the hydraulic lines 260 at the inlet and outlet ends of the various hydraulic components in the hydraulic transmission 200 for collecting line and hydraulic component pressure data.
The current sensor 530 and the voltage sensor 540 are mounted on each power generation unit 310 for collecting current and voltage data.
The rotation speed sensor 550 is mounted on the spindle 330, and is used for collecting rotation speed data of the spindle 320.
The wave sensor 560 is installed outside the wave absorbing device 100 for collecting wavelength data of an incident wave.
The electromagnetic clutch 330 is mounted on the main shaft 320 between the two power generation units 310, for controlling whether the power generation units 310 operate.
The working principle of the embodiment and the wave energy power generation method comprise the following steps:
s1, first-stage energy conversion: the energy is converted from wave energy to mechanical energy, and the wave absorbing device 100 converts the random motion of the waves into the relative reciprocating motion of the wave absorbing device 100 and the fixing device 400, and converts the wave energy of the sea surface into mechanical energy inside the device.
S2, second-stage energy conversion: the energy is converted from mechanical energy to hydraulic energy, and the hydraulic cylinder 210 converts the reciprocating motion of the hydraulic rod into hydraulic motion in the hydraulic line 260, and converts the mechanical energy of the hydraulic cylinder 210 into hydraulic energy in the hydraulic line 260.
S3, third-stage energy conversion: the energy is converted into electric energy by hydraulic energy, the spindle of the hydraulic motor 240 is directly connected with the main shaft 320 of the friction nano generator 300, the hydraulic motion in the hydraulic transmission device 200 drives the friction nano generator 300 to rotate, and the hydraulic energy of the hydraulic transmission device 200 is converted into electric energy of the friction nano generator 300.
S4, after the decision module device 570 collects the sensor data, the data information is compared with the preset working index information in real time, and the electromagnetic clutch 330 of the friction nano-generator 300 is controlled to be switched on or off through the control module device 560, so that the working quantity of the power generation units 310 is controlled, and the self-adaptive damping adjustment of the friction nano-generator 300 is realized.
And S5, after the decision module device 570 collects the sensor data, when the data information accords with the set extreme weather early warning information, the control module device 580 controls the electromagnetic clutch 330 between the friction nano generator 300 and the hydraulic motor 240 to realize motor cutting-out, so that the friction nano generator 300 is prevented from being damaged.
And S6, after the decision module device 570 collects the sensor data, when the data information and the fault information are consistent, the control module device 580 controls the electric clutch 330 in front of the damaged power generation unit 310 to be cut off and waits for manual maintenance.
And S7, when the friction nano generator 300 is manually maintained, the single damaged friction nano generator unit 310 is detached from the friction nano generator 300, the friction nano generator unit 310 in a good state can be installed immediately, and the damaged friction nano generator unit 310 is brought back to be maintained later.
The wave energy power generation device is simple and convenient to work and maintain, has high intelligent degree, and reduces the operation and maintenance difficulty in the later stage of manpower to a great extent.
Preferably, the damping coefficient of the single power generation unit 310 of the friction nano-generator 300 is about 10kN-s/m, and the number of the designed power generation units is 8.
Fig. 6 shows the implementation process of adaptive damping change and safe and stable operation of the wave power generation device from the simulation point of view.
When the incident wavelength L reaches the cut-in wavelength (l=10m), the generator of the device cuts in to start generating electricity; when the incident wavelength L is in a short wave interval (10 m < L <30 m), a generator of the device can work for 2-4 power generation units; when the incident wavelength L is located in a medium wave interval (30 m < L <70 m), the generator of the device can work for 4-8 power generation units; when the incident wavelength L is located in a long-wave interval (70 m < L <90 m), a generator of the device reaches a rated load interval, and 8 power generation units work normally; when the incident wavelength L exceeds the cut-out wavelength (l=90m), the generator of the device cuts out, and the power generation is finished, so that the reliability of the device is improved. The self-adaptive damping-variable operation can enable the system damping to be optimally matched with the frequency of the incident wave, so that the maximum power generation of the wave power generation device under various wave states is achieved.
Fig. 7 shows a graph of the power generated by the designed adaptive damping-variable wave power generation device versus the power generated by the fixed damping wave power generation device from a simulation point of view.
When the damping coefficient of the fixed damping wave power generation device is 40kN-m/s, compared with the designed self-adaptive variable damping wave power generation device, the power generation power under different wavelength states is compared, and the shadow area can better show the power difference between the fixed damping wave power generation device and the self-adaptive variable damping wave power generation device. The self-adaptive variable damping power generation device has the advantage that the power generation power is remarkably improved compared with that of a fixed damping power generation device.
The embodiments of the present utility model have been described above with reference to the accompanying drawings, but the present utility model is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present utility model and the scope of the claims, which are to be protected by the present utility model.
Claims (8)
1. The utility model provides a novel point absorption formula ocean wave energy power generation device which characterized in that: comprises a wave absorbing device (100), a hydraulic transmission device (200), a friction nano-generator (300) and a fixing device (400);
the wave absorbing device (100) comprises an oscillating floater (110), a floating ring (120) and a damping limiting device (130), wherein the floating ring (120) is positioned on the water surface and fixed on the outer side of the oscillating floater (110), a cavity with an opening connected is arranged at the lower part of the oscillating floater (110), a hydraulic cylinder (210) for transmitting motion is fixed in the cavity, and the damping limiting device (130) for reducing impact force is arranged below the hydraulic cylinder (210);
the hydraulic transmission device (200) comprises a hydraulic cylinder (210), an energy accumulator (220), an oil tank (230), a hydraulic motor (240), a valve assembly (250) and a hydraulic pipeline (260), wherein the hydraulic cylinder (210) is a one-way hydraulic cylinder and is positioned at the joint of the wave absorbing device (100) and the fixing device (400), a hydraulic rod of the hydraulic cylinder (210) is connected with the upper end of the fixing device (400), so that the relative movement of the wave absorbing device (100) and the fixing device (400) can be converted by the hydraulic cylinder (210), the energy accumulator (220) and the oil tank (230) are both positioned in the floating device, an inlet and an outlet of the hydraulic motor (240) are connected by the hydraulic pipeline (260), a rotating shaft of the hydraulic motor (240) is connected with a main shaft of the friction nano generator (300), and the generated power is used as a power source of the friction nano generator;
the friction nano generator (300) comprises a plurality of power generation units (310), a main shaft (320), an electromagnetic clutch (330) and a waterproof shell (340), wherein the power generation units (310) are disc-shaped and are formed by two adjacent friction nano power generation material discs, the main shaft (320) is positioned at the center of the power generation units (310), the main shaft (320) connects the power generation units (310), the electromagnetic clutch (330) is arranged between the two power generation units (310), the waterproof shell (340) is positioned at the outer side, and the power generation units (310), the main shaft (320) and the electromagnetic clutch (330) are protected;
the fixing device (400) comprises an anchoring disc (410), a connecting rod (420) and an anchor chain (430), wherein the connecting rod (420) is positioned at the upper end of the anchoring disc (410) and is connected with the hydraulic transmission device (200), one end of the anchor chain (430) is positioned at the lower end of the anchoring disc (410), and the other end of the anchor chain is anchored on the sea bottom.
2. The novel point absorption ocean wave energy power generation device according to claim 1, wherein: the damping limiting device (130) comprises a fixed disc (131), a damping spring (132) and a sliding disc (133), wherein the fixed disc (131) is installed inside a cavity of the wave absorbing device (100), the upper end of the damping spring (132) is connected with the fixed disc (131), and the sliding disc (133) is installed at the lower end of the damping spring (132).
3. The novel point absorption ocean wave energy power generation device according to claim 1, wherein: the hydraulic transmission device (200) comprises a hydraulic cylinder (210), an oil tank (230), an energy accumulator (220) and a hydraulic motor (240); wherein,,
the hydraulic cylinder (210) is a one-way hydraulic cylinder and is positioned at the joint of the lower cavity of the wave absorbing device (100) and the fixing device (400) and is used for converting reciprocating mechanical energy into hydraulic energy;
the oil tank (230) is fixed at the lower side of the inside of the oscillating floater (110) and is used for storing hydraulic oil;
the accumulator (220) is positioned at the lower side in the oscillating floater (110) and is used for temporarily storing hydraulic oil and maintaining the stability of the system;
the hydraulic motor (240) is positioned inside the oscillating buoy (110), and an output shaft of the hydraulic motor (240) is connected with a main shaft (320) of the friction nano generator (300) to convert hydraulic energy into mechanical energy.
4. The novel point absorption ocean wave energy power generation device according to claim 1, wherein: the power generation unit (310) comprises an upper friction medium (311), a lower friction medium (312), a main shaft (320) and a power generation unit shell (313), wherein the upper friction medium (311) and the lower friction medium (312) are coaxially assembled, the upper friction medium (311) is connected with the main shaft (320) and can rotate along with the rotation of the main shaft (320), and the lower friction medium (312) is fixed in the power generation unit shell (313) and cannot rotate;
the electromagnetic clutch (330) is used for connecting two adjacent power generation units (310), and controlling the power generation units (310) to be connected with a main shaft (320) for rotation by controlling the self-attraction or separation state, so as to control the working quantity of the power generation units (310);
according to different wave conditions, the main working area is divided into a short wave area, a medium wave area and a long wave area, when the wavelength of the incident wave changes, the working number of the power generation units (310) of the generator changes accordingly, and the optimal matching between the system damping and the frequency of the incident wave is always kept.
5. The novel point absorption ocean wave energy power generation device according to claim 1, wherein: the hydraulic transmission device (200) further comprises a valve element group (250), the valve element group (250) comprises a one-way valve (251) and an overflow valve (252), the one-way valve (251) is arranged on the hydraulic pipeline (260), the one-way valve (251) is used for controlling the flow direction and the non-return effect, the overflow valve (252) is arranged between the hydraulic pipeline (260) and the oil tank (230), and the overflow valve (252) is used for stabilizing the pipeline and protecting the unloading effect.
6. The novel point absorption ocean wave energy power generation device according to claim 1, wherein: the self-adaptive damping device (500) is further included, the self-adaptive damping device (500) comprises a plurality of sensors, the plurality of sensors are mainly located in all parts of the device, and the decision module device (570) and the control module device (580) are installed inside the floater;
the sensors comprise an oil flow sensor (510), a pipeline pressure sensor (520), a current sensor (530), a voltage sensor (540), a rotating speed sensor (550) and a wave sensor (560) and are used for acquiring state data of a hydraulic system, a generator and waves; wherein,,
the oil flow sensor (510) is used for collecting flow data of inlet and outlet water flows of the hydraulic cylinder (210) and the hydraulic motor (240);
the pipeline pressure sensor (520) is used for collecting pressure data of the hydraulic cylinder (210) and the hydraulic motor (240);
the current sensor (530) is used for collecting current data generated by each generating unit in the generating set;
the voltage sensor (540) is used for collecting the generated voltage data of each power generation unit in the power generation unit;
the rotating speed sensor (550) is used for collecting rotating speed data of a main shaft in the generator set;
the wave sensor (560) is used to collect wavelength data of the incident wave.
7. The novel point absorption ocean wave energy power generation device according to claim 6, wherein: said decision module means (570) and control module means (580); wherein,,
the decision module device (570) is used for judging the current wave state and the device power generation amount according to analysis of the obtained sensor data, and carrying out adjustment planning on the power generation working state;
the control module device (580) is used for controlling the work quantity of the power generation units (310) of the friction nano-generator (300) by controlling the switch of the electromagnetic clutch (330) according to the adjustment plan, so as to realize the self-adaptive adjustment of the power of the generator.
8. The novel point absorption ocean wave energy power generation device according to claim 1, wherein: one section of the anchor chain (430) consists of three small flexible chains and is used for connecting the anchor disc (410), and the other end of the anchor chain (430) consists of one large flexible chain and is fixed on the seabed plane.
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