CN110514402B - Experimental device for testing performance of wave energy device - Google Patents
Experimental device for testing performance of wave energy device Download PDFInfo
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- CN110514402B CN110514402B CN201910892340.2A CN201910892340A CN110514402B CN 110514402 B CN110514402 B CN 110514402B CN 201910892340 A CN201910892340 A CN 201910892340A CN 110514402 B CN110514402 B CN 110514402B
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- 238000012360 testing method Methods 0.000 title claims abstract description 30
- 239000006247 magnetic powder Substances 0.000 claims abstract description 41
- 238000013016 damping Methods 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 claims description 4
- 238000004088 simulation Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 239000004677 Nylon Substances 0.000 claims description 2
- 230000009471 action Effects 0.000 claims description 2
- 229920001778 nylon Polymers 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- 230000009347 mechanical transmission Effects 0.000 abstract description 2
- 238000010248 power generation Methods 0.000 description 9
- 238000011160 research Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000006249 magnetic particle Substances 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention provides an experimental device for testing performance of a wave energy device, which comprises a floater, a torque power sensor, a magnetic powder brake, a spring and an inertia shaft, wherein the floater is connected with the magnetic powder brake; the invention relates to a magnetic powder hydraulic test device, which comprises a float, a torque power sensor, a magnetic powder brake, a pulley slideway structure, a current controller, a data acquisition device, a mechanical transmission device and a hydraulic system, wherein the float is vertically arranged and is connected with the torque power sensor through a gear-rack structure, one end of the magnetic powder brake is connected with the torque power sensor, the other end of the magnetic powder brake is connected with the inertia shaft, the torque power sensor and the magnetic powder brake are arranged on a horizontal structure of the support, one end of a spring is fixed on the support, the other end of the spring is fixed at the upper end of the float, the pulley slideway structure is further included, the slideway is arranged on the vertical structure of the support, one side of the pulley is tangential to the float, the other side of the pulley is tangential to the slideway, and the current controller is connected with the magnetic powder brake.
Description
Technical Field
The invention relates to an experimental device, in particular to an experimental device for testing performance of a wave energy device, and belongs to a new energy utilization technology.
Background
In recent years, in view of the wide application prospect of the wave energy utilization device, the wave energy utilization device is increasingly focused by students and engineers. For the hydrodynamic characteristics and energy output characteristics of wave energy devices, common research means mainly comprise: theoretical analysis, numerical simulation, experimental study and real sea state testing. The small-scale test research at the laboratory stage is an extremely important early-stage research work, and the test in the wave water tank can intuitively reflect the performance of the wave energy device, provide technical support for further research and development of the wave energy device, and provide verification data for theoretical analysis and numerical simulation.
For wave power plants, hydraulic power generation systems are the most competitive power take-off (PTO) systems. Therefore, the hydraulic power generation system is adopted as an energy output system to conduct research in the physical model test stage, and the method is ideal. For the model test, if each physical parameter (PTO damping force, rigidity, mass, friction, etc.) of the prototype hydraulic power generation system is converted according to the test scale ratio, the parameters of the hydraulic power generation system required for the test can be obtained. In general, the physical parameters of the PTO system required by the laboratory after scaling are small. For a small hydraulic power generation system required by a laboratory, the existing manufacturing process can meet the requirements of PTO damping force, rigidity and quality, but the friction force requirement is difficult to reach, namely, the friction force of the small hydraulic power generation system manufactured by the existing process is obviously larger than an ideal value. Therefore, it is difficult to develop a physical model test using a small-sized hydraulic power generation system under the condition that the reduction ratio is satisfied.
Aiming at physical model tests of an oscillating floating body type wave energy conversion device, a scholars propose a wave energy power testing device which consists of a magnetic powder brake, a torque power sensor, a tension controller, a gear rack, a pulley slideway and other components, so that the influence on energy capture by different environment variables is realized, but for the analysis of the characteristics of a PTO system, the experimental device is difficult to meet the test requirements, and the influence on the energy capture characteristics caused by the quality and rigidity change of a PTO cannot be explored. For experimental studies, to reveal the wave energy capture mechanism of the wave energy power plant and the law of influence of various parameters, it is necessary to study the influence of changes in the damping force, mass and stiffness of the PTO system on the performance of the wave energy power plant. It is therefore important for laboratory studies of wave power plants to build a small energy output system that simulates the damping force, mass and stiffness of a typical hydraulic system PTO and has less frictional resistance.
The damping force of the hydraulic power generation system is characterized by a special nonlinear damping force, namely coulomb damping force. The magnetic powder brake can generate coulomb damping force better, so that the typical coulomb damping force can be generated by the magnetic powder brake. The patent discloses a test device and a test method which have small friction damping force and can adjust the damping force (coulomb damping force), the quality and the rigidity of a PTO system.
Disclosure of Invention
The invention aims to simulate typical nonlinear coulomb damping force, measure the output energy of a PTO system in real time, flexibly adjust the rigidity and the quality of the PTO system according to the requirement, analyze the variation trend of different PTO damping forces and output power, realize the research means of enriching the wave energy device, provide technical support for the research and development of the wave energy device and provide an experimental device for the performance test of the wave energy device.
The purpose of the invention is realized in the following way:
An experimental device for testing performance of a wave energy device comprises a floater, a torque power sensor, a magnetic powder brake, a spring and an inertia shaft; the float is arranged vertically and is connected with the torque power sensor through the gear rack structure, one end of the magnetic powder brake is connected with the torque power sensor, the other end of the magnetic powder brake is connected with the inertia shaft, the torque power sensor and the magnetic powder brake are arranged on a horizontal structure of the support, one end of the spring is fixed on the support, the other end of the spring is fixed at the upper end of the float, the pulley is further provided with a pulley slideway structure, the slideway is arranged on the vertical structure of the support, one side of the pulley is tangent with the float, the other side of the pulley is tangent with the slideway, the pulley further comprises a current controller and a data acquisition device, the current controller is connected with the magnetic powder brake, and the data acquisition device is connected with the torque power sensor.
The invention also includes such features:
1. The gear, the torque power sensor and the magnetic powder brake are connected through a rigid shaft;
2. the slide way is made of nylon, and the inertia shaft is made of lead;
3. the support is fixed at the bottom of the pool.
Compared with the prior art, the invention has the beneficial effects that:
Compared with a hydraulic system, the mechanical transmission device has small friction force, and is suitable for carrying out a small-scale test in a laboratory; a typical nonlinear PTO damping force, i.e., coulomb damping force, can be generated that characterizes the damping force characteristics of the hydraulic power generation system and can measure PTO damping force and output energy in real time; parameters (damping force, mass and stiffness) of the PTO system are conveniently adjusted according to the test requirements to study the mechanism of influence of each parameter on the characteristics of the wave power assembly.
Drawings
FIG. 1 is a cross-sectional view of the structure of the present invention;
fig. 2 is a top view of the structure of the present invention.
Wherein: 1. float, 2, rack, 3, gear, 4, rigid axle, 5, torque power sensor, 6, magnetic powder brake, 7, inertia axle, 8, spring, 9, bracket, 10, slideway, 11, pulley, 12, current controller, 13, data acquisition equipment.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
An experimental device and method for testing the performance of a wave energy device mainly comprises a floater 1, a torque power sensor 5, a magnetic powder brake 6, a spring 8 and an inertia shaft 7. The PTO system consists of a current controller 12, a magnetic particle brake 6, a spring 8 and an inertia shaft 7. The inertia shaft 7 is connected with the magnetic powder brake 6, and the purpose of controlling the mass of the PTO system is achieved by selecting the inertia shafts 7 with different moments of inertia; the upper end of the spring 8 is fixed above the floater 1, the lower end of the spring 8 is fixed on the floater 1, the spring 8 is vertically arranged, and the purpose of adjusting the rigidity of the PTO system is achieved by selecting springs with different rigidities. One end of the current controller 12 is connected with a power supply, and the other end of the current controller is connected with the magnetic powder brake 6, and the output current of the current controller 12 is controlled so as to control the torque output of the torque sensor 5, thereby achieving the purpose of controlling the PTO damping force acting on the float 1; The floater performs heave motion, and a traditional mechanism of a gear 3-rack 2 is adopted to connect the floater 1 with the PTO system, so that the linear motion of the floater can be converted into axial motion, and the PTO system is convenient to test. The torque power sensor 5 is positioned between the gear 3 and the magnetic powder brake 6, the acquisition equipment is connected with the torque power sensor 5 through a transmission line, the data acquisition equipment can directly read data of the torque sensor 5 about torque, power, rotating speed and the like, the torque power sensor 5 and the magnetic powder brake 6 are placed on the bracket 9, and the bracket is fixed above the floater; the inertia shaft 7 is arranged at the outermost side of the PTO system, so that the inertia shaft 7 with characteristic inertia moment can be replaced conveniently, and the purpose of adjusting the mass of the PTO system is achieved; The spring 8 is arranged above the floater 1, the upper end of the spring 8 is fixed, and the lower end of the spring is directly connected with the floater 1, so that the spring can be replaced conveniently, and the purpose of adjusting the rigidity of the PTO system is achieved; the pulley 11-slideway 10 mode is adopted to connect the floater, thereby realizing the vertical pile guiding function, limiting the heave motion of the floater, rolling friction is utilized to replace sliding friction, the pulley 11 with smaller friction coefficient is selected to be fixed on the front side and the rear side of the floater, and the connection mode can enable the floater 1 to vertically move under the action of waves and has smaller friction resistance. The torque power sensor 5 is located between the gear and the magnetic powder brake 6, and the data acquisition device 13 is connected with the torque power sensor 5 through a transmission line, so that the torque power sensor 5 can directly read the torque and power generated by the magnetic powder brake 6. The connection between the gear-torque power sensor 5 and the magnetic powder brake 6 adopts the connection of the rigid shaft 4, and when the rigid shaft 4 is selected, the shaft with smaller radius and length should be selected, so that the additional moment of inertia caused by the rigid shaft 4 can be avoided, and the error of test data is reduced. The torque power sensor 5 and the magnetic particle brake 6 are fixed to a bracket 9, the bracket 9 is fixed above the side of the float, and the distance between the bracket 9 and the upper side of the float is about three times of wave height, so that collision between the upper wall of the bracket and the bracket 9 is avoided when the float moves. And the data acquisition equipment 13 connected with the torque power sensor 5 and the current controller 12 connected with the magnetic powder brake 6 are arranged beside the water tank. The position of the floater 1 is preferably arranged at the rear side of the water tank, and the distance between the floater and the wave generator is not too short, so that secondary reflection of the wave generator can be reduced as much as possible, and long-time wave element simulation and effective data acquisition are facilitated. The inertia shaft 7 is made of lead material, so that the inertia shaft 7 with smaller volume can have larger moment of inertia.
In addition to the above embodiments, the invention is also applicable to other oscillating buoyancy-type wave energy devices (e.g., buoyancy pendulum wave energy devices) by way of conversion. All technical schemes formed by equivalent substitution or equivalent transformation fall within the protection scope of the invention.
Claims (5)
1. The experimental device for testing the performance of the wave energy device is characterized by comprising a floater, a torque power sensor, a magnetic powder brake, a spring and an inertia shaft; the floats are vertically arranged and connected with the torque power sensor through a gear rack structure; one end of the magnetic powder brake is connected with the torque power sensor, the other end of the magnetic powder brake is connected with the inertia shaft, and the inertia shaft is connected with the magnetic powder brake, so that the purpose of controlling the mass of the PTO system is achieved by selecting inertia shafts with different moments of inertia; the torque power sensor and the magnetic powder brake are arranged on the horizontal structure of the bracket; one end of the spring is fixed on the bracket, the other end of the spring is fixed on the upper end of the floater, and the PTO system further comprises a pulley slideway structure, and the purpose of adjusting the rigidity of the PTO system is achieved by selecting springs with different rigidities; The slideway is arranged on the vertical structure of the bracket; one side of the pulley is tangent to the floater, and the other side of the pulley is tangent to the slideway, and the pulley further comprises a current controller and data acquisition equipment; one end of the current controller is connected with a power supply, and the other end of the current controller is connected with the magnetic powder brake, so that the output current of the current controller is controlled to control the torque output of the torque sensor, and the purpose of controlling the PTO damping force acting on the floater is achieved; the floater performs heave motion, and a gear-rack traditional mechanism is adopted to connect the floater with the PTO system, so that the linear motion of the floater is converted into axial motion, and the PTO system is convenient to test; the torque power sensor is positioned between the gear and the magnetic powder brake, the acquisition equipment is connected with the torque power sensor through a transmission line, the data acquisition equipment directly reads data of the torque sensor about torque, power and rotating speed, the torque power sensor and the magnetic powder brake are placed on a bracket, and the bracket is fixed above the floater; The inertia shaft is arranged at the outermost side of the PTO system, so that the inertia shaft with characteristic inertia moment is convenient to replace, and the purpose of adjusting the mass of the PTO system is achieved; the spring is arranged above the floater, the upper end of the spring is fixed, and the lower end of the spring is directly connected with the floater, so that the spring is convenient to replace, and the purpose of adjusting the rigidity of the PTO system is achieved; the vertical pile guide function is realized by connecting the floats in a pulley-slideway mode, the heave motion of the vertical pile guide function is limited, rolling friction is used for replacing sliding friction, pulleys with smaller friction coefficients are selected to be fixed on the front side and the rear side of the floats, and the vertical motion of the floats under the action of waves is realized by the connecting mode, so that the vertical pile guide function has smaller friction resistance; the torque power sensor is positioned between the gear and the magnetic powder brake, and the data acquisition equipment is connected with the torque power sensor through a transmission line, so that the torque power sensor directly reads the torque and the power generated by the magnetic powder brake; The connection between the gear and the torque power sensor and the magnetic powder brake adopts rigid shaft connection, and when the rigid shaft is selected, the shaft with smaller radius and length is selected, so that the additional moment of inertia caused by the rigid shaft is avoided, and the test data error is reduced; the torque power sensor and the magnetic powder brake are fixed on a bracket, the bracket is fixed above the side of the floater, and the distance between the bracket and the upper side of the floater is about three times of the wave height so as to prevent the upper wall of the bracket from colliding with the bracket when the floater moves; the data acquisition equipment connected with the torque power sensor and the current controller connected with the magnetic powder brake are arranged beside the water tank; the position of the floater is preferably arranged at the rear side of the water tank, the distance between the floater and the wave generator is not too close, the secondary reflection of the wave generator is reduced, and long-time wave element simulation and effective data acquisition are facilitated.
2. The experimental device for testing the performance of the wave energy device according to claim 1, wherein the gear, the torque power sensor and the magnetic powder brake are connected through a rigid shaft.
3. The experimental device for testing the performance of the wave energy device according to claim 1 or 2, wherein the slide way is made of nylon material, and the inertia shaft is made of lead material.
4. The experimental device for testing the performance of a wave energy device according to claim 1 or 2, wherein the bracket is fixed at the bottom of the pool.
5. The experimental device for testing the performance of a wave energy device according to claim 3, wherein the bracket is fixed at the bottom of the pool.
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| CN201910892340.2A CN110514402B (en) | 2019-09-18 | 2019-09-18 | Experimental device for testing performance of wave energy device |
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| CN201910892340.2A CN110514402B (en) | 2019-09-18 | 2019-09-18 | Experimental device for testing performance of wave energy device |
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| CN113030625B (en) * | 2021-03-23 | 2022-05-10 | 大连理工大学 | Laboratory land test method for energy conversion efficiency of oscillating float type wave energy device |
| CN115901174B (en) * | 2022-12-05 | 2023-08-22 | 华南理工大学 | Floating body experimental platform capable of realizing multi-degree-of-freedom motion of floating body |
| CN116202666B (en) * | 2023-02-24 | 2023-09-22 | 华南理工大学 | Integrated experimental device and method for testing performance of wave energy floater |
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| CN203037443U (en) * | 2012-12-27 | 2013-07-03 | 大连理工大学 | Buoyancy pendulum wave energy device model |
| JP6694436B2 (en) * | 2015-01-09 | 2020-05-13 | ウェロー オーワイ | Method and system for adjusting mass and spinning wheel rotor torque in a wave power plant |
| CN106014758B (en) * | 2016-05-19 | 2018-07-24 | 哈尔滨工程大学 | A kind of power-measuring device of oscillating float type Wave energy generating system |
| CN106644383B (en) * | 2016-12-28 | 2023-03-24 | 大连理工大学 | Variable-scale variable-structure semi-submersible wave power generation platform test device |
| CN106596047B (en) * | 2016-12-31 | 2020-01-14 | 大连理工大学 | Variable-principal-scale swing plate type wave energy power generation device model test method |
| CN107478407B (en) * | 2017-08-01 | 2020-05-29 | 浙江大学 | Shore type oscillating water column wave energy conversion device model test device and method |
| RU2689713C1 (en) * | 2018-07-09 | 2019-05-28 | Общество с ограниченной ответственностью "НПО Гидроэнергоспецстрой" | Device for evaluation of wave forces acting on wave power converter of coastal wave-energy complex, and evaluation of efficiency of wave energy conversion into useful work |
| KR101971252B1 (en) * | 2018-07-20 | 2019-04-22 | 장준하 | water waves occurring device in the water tank for wave force experiment |
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