CN220581173U - Device for generating power by utilizing ocean waves - Google Patents

Abstract

The utility model discloses a device for generating power by utilizing ocean waves in the ocean, which comprises a traction rope, a driving unit A, a driving unit B, a gear box, a planetary transmission and a generator, wherein the traction rope is arranged on the side of the traction rope; the two ends of the driving unit A and the driving unit B are respectively connected with a planetary transmission through a gear box in a driving way, the other end of the planetary transmission is connected with a generator in a driving way, the gear boxes on the same side, the planetary transmission and the generator are fixedly installed together, the same gear box is connected with the same side end of the driving unit A and the same side end of the driving unit B, and a traction rope bypasses the driving unit A and the driving unit B simultaneously; the alternating rotational input of the drive unit a and the drive unit B to the gearbox is converted via the gearbox into a fixed rotational output to the planetary transmission. Compared with the prior art, the method has the advantages that: this novel energy conversion rate is higher, and can be applicable to multiple sea areas, and the practicality is stronger.

Description

Device for generating power by utilizing ocean waves

Technical Field

The utility model relates to the technical field of ocean wave power generation, in particular to a device for generating power by utilizing ocean waves.

Background

In the large background of the development of new energy in various countries in the world in recent years, the wave energy has huge reserves, high energy flow density and environmental protection and cleanliness, and is one of important choices for coping with the shortage of fossil energy and global warming. According to statistics, more than 200 wave power generation devices are being developed worldwide in 2017, the technology maturity is different, the technology types of the wave power generation devices are not converged, and all the types of devices have a certain development prospect.

However, further commercial applications of wave energy devices still face 3 major problems: (1) From the energy conversion rate, the technological development of wave energy conversion is still in an immature stage; (2) Uncertainty of energy development caused by environmental conditions of wave-captured sea areas; (3) Wave energy development has economic problems at the current stage.

Today, wave energy utilization is in a key turning period, and research and development breakthrough of scientific research institutions and new energy enterprises in various countries are turned from mechanism technology research into how to reduce energy cost of wave energy development so as to obtain opportunities of market competition with other various new energy.

In order to solve the problem of high cost, first, the mechanism of various main stream wave energy power generation devices needs to be continuously and deeply researched, a control strategy is optimized, and the energy capturing efficiency is improved; and secondly, diversification and comprehensive utilization are new directions of wave energy development, and the wave energy power generation device can be coupled with other offshore structures for development and comprehensive utilization.

The following is the mechanism of the existing mainstream wave energy power generation device:

1: "AquaBuoy" system (Point suction wave energy converter)

The point suction type wave energy converter mainly comprises a buoy and an accelerating tube; the buoy has a turbine therein, which is driven by a water pump. The system compresses seawater by utilizing waves, and the seawater pushes blades in the turbine to rotate so as to drive the generator to generate electricity.

The system can effectively work in a marine environment with rough sea. In the case of small ocean waves, however, the loading of the pump and turbine can produce significant energy losses that are significant and do not produce efficient energy.

2: pelamis system (sea snake wave power generation)

The sea snake wave power generation device consists of a pontoon, a connecting unit and a hydraulic piston. In order to collect unstable wave energy, it is required that the wave energy generating apparatus converts mechanical energy in the wave energy into electric energy through two-pole energy conversion. The sea snake system is a high-power wave power generation device which is emerging in recent years, the power generation power can reach 750kW, and the sea snake system is installed in a sea area which is 2-10 km away from the coast and has a water depth of more than 50 m. The sea snake type wave power generation device has different energy absorption and conversion effects on waves with different wavelengths, namely, the pitch of the sea snake is optimally matched with the wave wavelength, and the energy harvesting is maximum when the wave wavelength is matched with the pitch of the sea snake; when the wave wavelength is doubled with the sea snake pitch, the energy harvesting is only 1/3 of the maximum; when the wave wavelength is less than the sea snake pitch, the energy harvest is 0. Since the sea snake pitch is fixed, the maximum energy can not be always captured after the sea condition changes, which is a limitation of the sea snake type wave power generation device.

3: "Manchester Bobber" System

The system is comparable in size to an offshore drilling platform. A relatively large float is connected to the system and is secured to the support structure with a strong wire rope. One end of the conveying belt is fixedly connected with the floater, and the other end of the conveying belt is connected with the floater. And then is meshed with a gear combined with the shaft. By the float floating, the conveyor belt is caused to slide alternately, thereby causing rotation of the shaft. This system allows it to move in only one direction by means of a flywheel. However, this system may produce 50% energy loss and is used to reload the system as the wave rises, accelerating the generator, which would otherwise slow down. Multiple floats can compensate for inactive phases between them, but a single generator is connected to a single float, the rising phase of which is charged by the float, enabling the system to maintain adequate rotation. As the wave descends, the weight of the float resumes rotation of the generator. The system needs to be connected with a marine fixing mechanism and has great limitation in installation.

4: "OSU" system

The system uses a high-efficiency neodymium permanent magnet, rare earth and other materials. However, in this system, moderate motion limits the ability of the system, in fact, the very low linear velocity produced by the waves, results in very low energy conversion.

5: "OPT" system

The system is designed to operate in a vertical motion. In this case, the stroke of the piston may become an important factor limiting its performance. When the wave length is greater than the length of the piston rod, the wave energy cannot be fully utilized. In addition, the delay created by hydraulic pushing and mechanical friction also creates a significant loss of efficiency.

The development of sea wave power generation in China is also rapid, and the following are listed as practical application technologies in China:

1: duck type buoy wave power generation system

The Guangzhou energy source begins to develop a duck buoy wave power generation system in 2007. After 2009, a plurality of offshore tests were performed on this 10KW wave energy device. The power generation device has an air pipe, the water surface (corresponding to a piston) in the pipe is relatively static, and the water surface can move up and down. Because the wave fluctuation makes the buoy move up and down, the air in the sampling tube is compressed and expanded by the piston on the water surface, so that the air is flushed out of the air piston chamber, and the air wheel generator set is driven to generate electricity. "the efficiency of the system is greatly reduced during compression and release of the piston.

The national ocean technology center mainly researches and develops a pendulum wave energy power generation system. In 2012, a 100KW bottom hinge pendulum device is developed under the support of national science and technology plan, and sea test is carried out in the sea area of the Qingdao, i.e. the ink Daguan island, in Shandong.

The main function of the energy absorbing part of the device is to capture wave energy, which belongs to the part directly acted by waves, and the device is required to be reliable, efficient, firm and stable. In combination with the requirements of the overall structural design, a pendulum is selected as the wave energy absorbing component of the device. The whole device is packed to the box, plays the effect of isolated sea water. The pendulum bob is used for absorbing wave energy and converting the wave energy into mechanical energy of the pendulum bob, and is a main working part of the device.

The pendulum is a main component of the energy absorbing portion, and factors influencing the generated power are the mass and the radius of rotation of the pendulum. The influence of the mass of the pendulum on the generated power is mainly discussed here. In the actual working process, the pendulum weight is too light and can not twist the spring, and the spring can not rotate when the wave is gentle, so that the generated power is too low, the load of manufacturing, transportation and arrangement can be increased when the weight is too heavy, the inertia is too large and can not rotate when the sea condition level is low, and even the whole weight of the device is too large and sinks into the sea bottom.

Sea state grade is a decisive condition affecting the power generation performance of the device and is also the most considered factor in the development of wave energy. Only enough sea waves can bring rich wave energy, the sea waves are too small, the pendulum bob cannot swing sufficiently, satisfactory power generation is not obtained naturally, and economic benefits are not from talking; the ocean wave is overlarge, and the power generation power is increased, but the device is also greatly impacted by the ocean wave, so that the device is in danger of being knocked over or even destroyed.

2: oscillating float type wave energy power generation system

In 2012, 120KW double stators developed by Shandong university, an oscillating buoy type wave power generation device with a double-voltage structure is turned into a Shandong sea island and sea test is carried out.

In 2014, a 10KW combined type oscillating floater wave energy generating device 'Hailingno' is developed by China ocean university, and is successfully put in a sea area of a Zhai Tang island, the device converts wave energy into electric energy by using a combined type gyro oscillating floater and a double-way hydraulic system, and the device is installed and positioned on the sea by using a submerged floater and a tension anchor.

The wave energy conversion device is mainly designed in a wave energy-mechanical energy-electric energy conversion mode. Firstly, a floating body in direct contact with seawater moves along with waves in a fluctuating way, and wave energy is converted into mechanical energy held by the floating body; secondly, the motion of the floating body drives the middle mechanical transmission device to move, and the mechanical transmission device plays an important role in accelerating and transmitting energy, namely, the reciprocating motion of the floating body is converted into unidirectional rotary motion; finally, the mechanical energy transferred by the mechanical transmission device is converted into electric energy through the generator.

The transmission mode adopted by the system is closed gear transmission, and the system consists of gear and rack transmission and a primary cylindrical spur gear speed increaser. The transmission device can cope with the severe working environment of the wave power generation device on one hand and can meet the lubrication requirement of parts on the other hand. The speed increaser can be used for reducing torque and increasing rotating speed to meet the requirement of the generator on rotating speed, and has other important functions such as changing the form of movement, changing the direction of movement, transmitting power and movement, distributing power and the like.

The float support limits the superiority of the system to some extent. And the system has low capability of resisting strong wind and waves.

4: floating wave energy power generation system-sea dragon

In 2012, under the support of ocean energy special funds, the national institute of advanced marine craft 710 has conducted research and construction of an exemplary project of a large Mo Shanhai island wave energy autonomous power generation system. 300 kW's showy wave energy power generation facility "sea dragon, the device is connected by 4 floats and is constituteed, total length 86M, quality 400T. "

Sea dragon and sea snake mentioned above are the same working principle;

the sea snake type wave power generation device has different energy absorption and conversion effects on waves with different wavelengths, namely, the pitch of the sea snake is optimally matched with the wave wavelength, the wave wavelength is different from the sea snake pitch, the energy harvesting is different, and the energy harvesting is maximum when the wave wavelength is matched with the sea snake pitch; when the wave wavelength is doubled with the sea snake pitch, the energy harvesting is only 1/3 of the maximum; when the wave wavelength is less than the sea snake pitch, the energy harvest is 0. Since the sea snake pitch is fixed, the maximum energy can not be always captured after the sea condition changes, which is a limitation of the sea snake type wave power generation device.

5: 10KW floating pendulum type wave power generation device developed in 2011 by university of beauty

The large-size 1-collection device in Fujian Xiamen sea area takes a ship-shaped carrier as a platform, integrates wave energy and wind energy power generation devices, and comprises 10 oscillating floats, 2 floats and a vertical-axis fan. Sea test is carried out in the sea area of Fujian Xiamen in 2014, the actual power reaches 3.6KW, and the conversion efficiency of wave energy and wind energy reaches 15%.

Disclosure of Invention

The utility model aims to solve the technical problems and provide a device for generating power by utilizing ocean waves, which provides a device for converting the reciprocating motion of the ocean waves into electric energy or mechanical energy, and can avoid the known technical defects and be conveniently installed in water in a semi-submersible or immersed mode; the other purpose is to create conditions, fully utilize all energy of the wave when the wave rises and falls, more effectively convert the wave into electric energy or mechanical energy, greatly improve the efficiency and be applicable to all sea areas.

In order to solve the technical problems, the technical scheme provided by the utility model is as follows:

the device for generating power by utilizing ocean waves comprises a traction rope, a driving unit A, a driving unit B, a gear box, a planetary transmission and a generator; the two ends of the driving unit A and the driving unit B are respectively connected with a planetary transmission through a gear box in a driving way, the other end of the planetary transmission is connected with a generator in a driving way, the gear boxes on the same side, the planetary transmission and the generator are fixedly installed together, the same gear box is connected with the same side end of the driving unit A and the same side end of the driving unit B, and a traction rope bypasses the driving unit A and the driving unit B simultaneously; the alternating rotational input of the drive unit a and the drive unit B to the gearbox is converted via the gearbox into a fixed rotational output to the planetary transmission.

As an improvement, the driving unit a comprises a main shaft, a supporting bearing a, a supporting bearing B, a one-way bearing a and a one-way bearing B;

the gear box comprises a box shell, a transmission gear A, a transmission gear B, a slewing bearing A and a slewing bearing B;

the two ends of the main shaft extend into the two box shells; the left end part and the left box shell are in rotary connection through a support bearing A, the left end part and the transmission gear A are in rotary sleeving through a one-way bearing A, the transmission gear A and the left box shell are in rotary connection through a rotary bearing A, and the transmission gear A is connected with the planetary transmission on the left side; the right end part and the right side box shell are rotationally connected through a support bearing B, the right end part and the transmission gear B are rotationally sleeved through a one-way bearing B, the transmission gear B and the right side box shell are rotationally connected through a rotary bearing B, and the transmission gear B is connected with the right side planetary transmission;

and separation check rings sleeved on the main shaft are respectively arranged between the support bearing A and the one-way bearing A and between the support bearing B and the one-way bearing B.

As an improvement, the connection structure of the driving unit B and the two gearboxes and the connection structure of the driving unit A and the two gearboxes are bilaterally symmetrical.

Compared with the prior art, the utility model has the advantages that:

1. this novel energy conversion rate is higher, and can be applicable to multiple sea areas, and the practicality is stronger.

2. The utility model has the advantages of ductility and multiple purposes, and can generate renewable energy sources from natural wave motion or unnatural wave motion in the ocean, thereby obtaining the energy sources with high efficiency, low investment and limited maintenance.

Drawings

Fig. 1 is a schematic view of a part of the structure of the present utility model.

Fig. 2 is a schematic diagram of a portion of the structure of the present utility model.

Fig. 3 is a schematic view of a portion of the structure of the present utility model.

Fig. 4 is a schematic view of a portion of the structure of the present utility model.

Fig. 5 is a schematic structural view of the present utility model.

Fig. 6 is a schematic structural view of embodiment 1 of the present utility model.

Fig. 7 is a schematic structural view of embodiment 2 of the present utility model.

As shown in the figure: 1. a main shaft; 2. a one-way bearing A; 3. a separation baffle ring; 4. a support bearing A; 5. a transmission gear A; 6. a slewing bearing A; 7. a one-way bearing B; 8. a case housing; 9. a support bearing B; 10. a transmission gear B; 11. a slewing bearing B; 12. a planetary transmission; 13. a generator; 14. a traction rope; 15. an anchor cable; 16. a fixture; 17. a buoy; 18. a pontoon; 19. and (5) a counterweight.

Detailed Description

In the description of the present utility model, it should be understood that the terms "center," "lateral," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more. In addition, the term "include" and any variations thereof are intended to cover a non-exclusive inclusion.

The present utility model will be described in further detail with reference to the accompanying drawings.

An apparatus for generating electricity by ocean waves comprises a traction rope 14, a driving unit A, a driving unit B, a gear box, a planetary transmission 12 and a generator 13; the two ends of the driving unit A and the driving unit B are respectively connected with a planetary transmission 12 through a gear box in a driving way, the other end of the planetary transmission 12 is connected with a generator 13 in a driving way, the gear boxes on the same side, the planetary transmission 12 and the generator 13 are fixedly arranged together, the same gear box is connected with the same side end of the driving unit A and the same side end of the driving unit B, and a traction rope 14 bypasses the driving unit A and the driving unit B simultaneously; the alternating rotational input of drive unit a and drive unit B to the gearbox is converted via the gearbox to a fixed rotational output to the planetary transmission 12.

As a preferred embodiment: the driving unit A comprises a main shaft 1, a supporting bearing A4, a supporting bearing B9, a one-way bearing A2 and a one-way bearing B7;

the gear box comprises a box shell 8, a transmission gear A5, a transmission gear B10, a slewing bearing A6 and a slewing bearing B11;

the two ends of the main shaft 1 extend into the two box shells 8; the left end part and the left box shell 8 are in rotary connection through a supporting bearing A4, the left end part and the transmission gear A5 are in rotary sleeving connection through a one-way bearing A2, the transmission gear A5 and the left box shell 8 are in rotary connection through a rotary bearing A6, and the transmission gear A5 is connected with the planetary transmission 12 on the left side; the right end part and the right box shell 8 are in rotary connection through a support bearing B9, the right end part and a transmission gear B10 are in rotary sleeving connection through a one-way bearing B7, the transmission gear B10 and the right box shell 8 are in rotary connection through a rotary bearing B11, and the transmission gear B10 is connected with a planetary transmission 12 on the right side;

and a separation check ring 3 sleeved on the main shaft 1 is respectively arranged between the support bearing A4 and the one-way bearing A2 and between the support bearing B9 and the one-way bearing B7.

The connection structure of the driving unit B and the two gear boxes and the connection structure of the driving unit A and the two gear boxes are bilaterally symmetrical.

This novel when the implementation: the drive units a and B are designed in parallel side by side, converting the water surface movements of the ocean, sea and lake into an alternating linear movement, generating electrical energy output by means of one or more generators 13.

The main shafts 1 are power input parts of the driving units A and B, the two main shafts 1 are parallel and respectively supported on the box shell 8 to rotate through the supporting bearing A4 and the supporting bearing B9, power is transmitted to the transmission gear A5 and the transmission gear B10 through the unidirectional bearing A2 and the unidirectional bearing B7, then the power is output to the planetary transmission 12, and the power is output to the generator 13 after being changed in speed through the planetary transmission 12 for producing electric energy for a storage battery or other uses.

When the main shaft 1 on the driving unit A and the driving unit B are simultaneously driven to rotate clockwise by the traction rope 14: the unidirectional bearing A2 can output power to the transmission gear A5, and the power is output outwards and clockwise through the transmission gear A5; the one-way bearing A7 cannot transmit power, and thus cannot output power to the outside through the transmission gear B10.

When the main shaft 1 on the driving unit A and the driving unit B are simultaneously driven to rotate anticlockwise by the traction rope 14: the unidirectional bearing B7 can output power to the transmission gear B10, and the power is output anticlockwise outwards through the transmission gear B10; the one-way bearing A2 cannot transmit power, and thus cannot output power to the outside through the transmission gear A5.

That is, no matter the clockwise or anticlockwise rotation input of the two spindles 1, the rotation direction of the output end of the system is kept unchanged, and the conversion from the alternating rotation input of the spindles 1 to the fixed rotation output is realized.

It should be noted that the main shaft 1 obtains the power provided by the outside through the traction rope 14, if the main shaft 1 is in the form of a rack and pinion, the traction rope 14 may be changed to a rack or a chain, and if the main shaft 1 is in the form of a pulley, the traction rope 14 may be changed to a V-belt, a cable or a rope. A tensioning wheel can be added between the main shafts 1 to increase the wrap angle of the traction rope 14 on the main shafts 1 so as to increase transmission efficiency.

It will be readily appreciated that the low speed power output by drive units a and B via transfer gears A5 and B10 is transferred to the respective planetary transmission 12, which planetary transmission 12 increases the lower speed to the higher speed, while the torque is correspondingly reduced to meet the demands of the generator 13. The planetary transmission 12 may be designed as a fixed gear stage, as a multi-stage variable gearbox (like a T-gearbox), or without a transmission, the drive units a and B directly driving the generator 13.

The novel joints are sealed well, and according to the water conditions, the novel joint can have different installation modes. The following are examples of the present utility model when applicable:

example 1

As shown in fig. 6, the utility model is connected with a fixed object 16 on the sea bottom through an anchor rope 15, the hoisting rope 14 passes through the space between the driving unit a and the driving unit B, the upper end of the hoisting rope is connected with a buoy 17 floating on the sea surface, and the lower end of the hoisting rope is connected with a counterweight 19. The buoy 17 moves up and down along with sea waves to drive the driving unit A and the driving unit B to rotate, so that power generation is realized.

Example 2

As shown in fig. 7, the present utility model is directly fixed on a fixed object 16 on the sea bottom, and after the hoisting rope 14 bypasses the driving unit a and the driving unit B, one end of the hoisting rope is connected with a buoy 17 floating on the sea surface, and the other end is connected with a buoy 18 floating in the sea water. The buoy 17 moves up and down along with sea waves to drive the driving unit A and the driving unit B to rotate, so that power generation is realized.

The utility model can also have different vibration and size according to the wave fluctuation characteristics and the amount of the generated energy. The utility model can also be equipped with a global positioning system or a sonar annunciator, and can also be detected or recovered at sea when the annunciator is disconnected with a reservation system.

The utility model and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the utility model as shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present utility model.

Claims (4)

1. The utility model provides a device that utilizes ocean wave to carry out electricity generation which characterized in that: comprises a traction rope (14), a driving unit A, a driving unit B, a gear box, a planetary transmission (12) and a generator (13); the two ends of the driving unit A and the driving unit B are respectively connected with a planetary transmission (12) through a gear box in a driving way, the other end of the planetary transmission (12) is connected with a generator (13) in a driving way, the gear boxes on the same side, the planetary transmission (12) and the generator (13) are fixedly arranged together, the same gear box is connected with the same side end of the driving unit A and the same side end of the driving unit B, and a traction rope (14) bypasses the driving unit A and the driving unit B simultaneously; the alternating rotational input of the drive unit A and the drive unit B to the gearbox is converted via the gearbox into a fixed rotational output to the planetary transmission (12).

2. An apparatus for generating electricity from ocean waves as defined in claim 1, wherein: the driving unit A comprises a main shaft (1), a supporting bearing A (4), a supporting bearing B (9), a one-way bearing A (2) and a one-way bearing B (7);

the gearbox comprises a box shell (8), a transmission gear A (5), a transmission gear B (10), a slewing bearing A (6) and a slewing bearing B (11);

two ends of the main shaft (1) extend into the two box shells (8); the left end part and the left box shell (8) are rotationally connected through a support bearing A (4), the left end part and the transmission gear A (5) are rotationally sleeved through a one-way bearing A (2), the transmission gear A (5) and the left box shell (8) are rotationally connected through a slewing bearing A (6), and the transmission gear A (5) is connected with a planetary transmission (12) on the left side; the right end part and the right side box shell (8) are rotationally connected through a support bearing B (9), the right end part and a transmission gear B (10) are rotationally sleeved through a one-way bearing B (7), the transmission gear B (10) and the right side box shell (8) are rotationally connected through a slewing bearing B (11), and the transmission gear B (10) is connected with a planetary transmission (12) on the right side.

3. An apparatus for generating electricity from ocean waves as defined in claim 2, wherein: and separation check rings (3) sleeved on the main shaft (1) are respectively arranged between the support bearing A (4) and the one-way bearing A (2) and between the support bearing B (9) and the one-way bearing B (7).

4. A device for generating electricity from ocean waves as defined in claim 3, wherein: the connection structure of the driving unit B and the two gear boxes and the connection structure of the driving unit A and the two gear boxes are bilaterally symmetrical.