CN113992060B - Synchronous vibration suppression and power generation device and method combining drainage and sliding pendulum - Google Patents
Synchronous vibration suppression and power generation device and method combining drainage and sliding pendulum Download PDFInfo
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- CN113992060B CN113992060B CN202111252731.1A CN202111252731A CN113992060B CN 113992060 B CN113992060 B CN 113992060B CN 202111252731 A CN202111252731 A CN 202111252731A CN 113992060 B CN113992060 B CN 113992060B
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- 230000001629 suppression Effects 0.000 title claims abstract description 23
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 16
- 238000010248 power generation Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000000926 separation method Methods 0.000 claims description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 230000001808 coupling effect Effects 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims 1
- 230000002195 synergetic effect Effects 0.000 abstract 1
- 206010016256 fatigue Diseases 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
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- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
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- 239000010959 steel Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/186—Vibration harvesters
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/01—Risers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/185—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators using fluid streams
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
Abstract
The invention relates to a synchronous vibration suppression and power generation device and method combining drainage and sliding pendulum, wherein the device consists of a rotating and swinging system and a sliding component, the rotating and swinging system comprises a rotary bearing, a smooth auxiliary rod, an auxiliary rod with a slideway, a waveform piezoelectric sheet and a drainage cover, the sliding component consists of a chute ring, a connecting sliding block and a fish-shaped piezoelectric sheet, the drainage cover is a cylinder, both sides of the drainage cover are respectively provided with a drainage cover inlet port and a drainage cover outlet hole, and the fish-shaped piezoelectric sheet can slide in the chute ring along with the connecting sliding block. Under the synergistic effects of the drainage cover inflow port drainage, outflow hole jet outflow, the wave-shaped piezoelectric sheet dividing the wake flow of the vertical pipe and generating current, the fish-shaped piezoelectric sheet destroying the flow field around the vertical pipe and generating current, the vortex-induced vibration suppression is realized, and the ocean current energy is partially converted into electric energy for output.
Description
Background
The sea oil gas resource reserves are rich, the development of the sea oil gas is one of key measures for relieving the situation that the external dependence of the traditional fossil energy source in China is high, and the investment ratio in the deep water oil gas field is larger and larger. Marine risers are one of the key facilities for deep water hydrocarbon development, responsible for connecting the offshore floating unit to the subsea wellhead or to the tie of the subsea pipeline. The marine riser is subjected to the actions of floating body movement and severe ocean wave flow environment for a long time, and faces a series of complex technical problems of fluid-solid coupling response, vibration fatigue risk, multi-body interference and the like, so that the design of an engineering scheme and the arrangement of a water surface floating body are directly influenced, and the marine riser is key equipment for controllability in deep water engineering.
Marine risers have various arrangements such as top-tensioned risers, free-hanging steel catenary risers, hybrid risers, and the like. The riser is subjected to wave and ocean current loads in the ocean and is in a vibration state for a long time, and fatigue damage risks exist. When the frequency of vortex-induced vibration is similar to the natural frequency of the structure, the frequency locking phenomenon is triggered, resonance is formed, and the structure is subjected to fatigue failure in a short time. Once a marine riser fails due to vibration fatigue, the hydrocarbon production fluid in the riser will be uncontrollably injected or spilled into the sea water, creating a catastrophic failure. Therefore, the vortex-induced vibration is effectively restrained, and the long-term safe service of the vertical pipe is facilitated. In addition, the kinetic energy generated by vortex-induced vibration is effectively collected and utilized, and thus the method can be changed into a benefit. Therefore, on the premise of ensuring the safe service of the marine riser, the sea energy is effectively captured, so that the riser becomes an underwater power plant, and the marine riser is an innovation for realizing two effects of vibration suppression and power generation at one time.
Disclosure of Invention
The invention aims to solve the problems and the defects of the conventional vortex-induced vibration suppression device of the marine riser and provides a device and a method for synchronous vibration suppression and power generation by combining drainage and sliding pendulum with high efficiency and no energy consumption.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the synchronous vibration suppression and power generation device combining drainage and sliding pendulum consists of a rotating pendulum system and nine sliding components. The rotary swing system comprises two rotary bearings, a smooth auxiliary rod, three auxiliary rods with slide ways, a wave-shaped piezoelectric sheet and a drainage cover; the sliding component consists of a chute ring, two connecting sliding blocks and a fish-shaped piezoelectric plate.
The rotary bearing is an inner ring structure and an outer ring structure embedded with ball rollers, the outer wall of the outer ring of the rotary bearing uniformly extends out of four fixing lantern rings along the circumferential direction to be used for fixing auxiliary rods, and the central axis of one fixing lantern ring coincides with the center vertical line of the inflow port of the drainage cover. An annular drainage cover slot is formed in the end face of the outer ring of the rotary bearing, the width of the drainage cover slot is equal to the wall thickness of the drainage cover, and the depth of the drainage cover slot is half of the height of the outer ring of the rotary bearing. The inner diameter of the rotary bearing is equal to the outer diameter of the vertical pipe, and the upper rotary bearing and the lower rotary bearing are sleeved on the outer wall of the vertical pipe according to the height of a drainage cover at intervals.
And a smooth auxiliary rod is fixedly arranged between the upper rotating bearing fixing lantern rings and the lower rotating bearing fixing lantern rings corresponding to the middle parts of the outflow holes of the drainage cover. The diameter of the smooth auxiliary rod is equal to the diameter of the fixed sleeve ring minus twice the thickness of the wave-shaped piezoelectric sheet, the wave-shaped piezoelectric sheet is attached to the smooth auxiliary rod in a U shape, the attached part of the wave-shaped piezoelectric sheet and the smooth auxiliary rod is longer than the wing parts extending out from two sides, and the surfaces of the wing parts of the wave-shaped piezoelectric sheet are wavy. And an accessory rod with a slideway is fixedly arranged on the three remaining fixed lantern rings of the rotary bearing respectively. Four vertical cuboid concave slide ways are uniformly formed on the outer surface of the accessory rod with the slide way along the circumferential direction, the length of the slide way is the length of the accessory rod with the slide way minus the height of four rotating bearings, and the slide ways are arranged in the middle of the accessory rod with the slide way in a vertical symmetrical mode. The diameter of the auxiliary rod with the slideway is equal to that of the fixed lantern ring, a straight conductive wire is arranged in the auxiliary rod with the slideway, and a straight conductive wire is also arranged in the smooth auxiliary rod.
The drainage cover is a cylinder, and both sides of the drainage cover are respectively provided with a drainage cover inflow port and a drainage cover outflow hole. The flow inlet of the drainage cover is a long and narrow rectangular flow inlet. The opposite sides of the inflow opening of the drainage cover are symmetrically provided with circular drainage cover outflow holes of a vertical array about a perpendicular bisector, and the central angles corresponding to the outflow holes of the drainage covers at the two sides are 30 degrees. The drainage cover is inserted into the drainage cover slot of the rotary bearing to be fixed, and the drainage cover outflow holes on two sides of the drainage cover are positioned on one side of the smooth auxiliary rod and are symmetrical relative to the smooth auxiliary rod.
Three sliding components are sleeved on each accessory rod with a slideway. The inner diameter of the chute ring is equal to the diameter of the accessory rod with the slideway, and the chute ring is formed by butt-jointing two symmetrical semicircular annular components through bolts. Four sliding rails are uniformly distributed on the inner wall of the sliding groove ring along the circumferential direction, and the sliding rail size is consistent with the size of the concave sliding rail on the surface of the accessory rod with the sliding rail. The inside of the chute ring is provided with an upper magnet and a lower magnet, the magnetic poles of the magnets adjacent to the two adjacent chute rings are the same, and the chute rings slide up and down along the auxiliary rod shaft with the chute under the action of homopolar repulsion. The outer wall of the chute ring is circumferentially provided with two circles of circular arc chute, each circle of circular arc chute is internally provided with a connecting slide block capable of sliding along the circular arc chute, and the two connecting slide blocks are in the same vertical plane. The connecting slide block is provided with a buckle extending out of the circular arc chute, the side wall of the tail part of the fish-shaped piezoelectric sheet is provided with a bolt hole corresponding to the buckle of the connecting slide block, the buckle is fixedly connected with the fish-shaped piezoelectric sheet through a bolt, and the fish-shaped piezoelectric sheet can slide in the chute ring along with the connecting slide block.
The connecting slide block is embedded with a connecting wire, and the middle part of the chute ring is provided with a conductive circular ring coil. The current generated by the deformation of the fish-shaped piezoelectric sheet is transmitted to the conductive circular ring coil in the chute ring through the connecting lead of the connecting slide block and then transmitted to the straight conductive wire in the accessory rod with the slideway, thus completing the collection and output of the current. The current generated by the wave-shaped piezoelectric sheet is transmitted to the straight conducting wire inside the smooth accessory rod for output.
The synchronous vibration suppression and power generation method combining the drainage and the sliding pendulum is provided by the synchronous vibration suppression and power generation device combining the drainage and the sliding pendulum. When an attack angle exists between the ocean current direction and the waveform piezoelectric plate, the waveform piezoelectric plate deforms under the impact of ocean current to generate current and drives the rotary bearing to rotate until the waveform piezoelectric plate winds to the back current side of the vertical pipe. After stabilization, the waveform piezoelectric sheet is positioned on the back flow side, and the three-dimensional wake flow is divided, so that the development and interference of the wake flow shear layer are destroyed. Meanwhile, the waveform piezoelectric sheet and wake flow generate fluid-solid coupling response, the waveform piezoelectric sheet deforms to generate current, and the current is output through the straight conducting wire in the smooth accessory rod.
After the wave-shaped piezoelectric sheet winds to the back flow side, a part of ocean current flows in from the inflow opening of the drainage cover, flows to the outflow hole of the drainage cover along the annular space between the drainage cover and the vertical pipe, and flows out from the outflow hole of the drainage cover. Because the drainage cover outflow holes are positioned near boundary layer separation points on two sides, the flow direction and the flow speed of the ocean current ejected from the drainage cover outflow holes are regulated, disturbance is generated on the back flow side wake flow of the vertical pipe, the position of the boundary layer separation points is changed, and the formation and development of vortex are destroyed.
Because the magnetic poles of the magnets adjacent to the two adjacent chute rings are the same, the chute rings slide up and down on the auxiliary rod shaft with the slideway under the action of homopolar repulsion, and the three-dimensional structure of the bypass is damaged.
After the fish-shaped piezoelectric sheet is impacted by ocean currents, the fish-shaped piezoelectric sheet slides around the circular arc-shaped chute under the drive of the connecting sliding block, so that the flow field around the vertical pipe is damaged, boundary layer separation and vortex generation are disturbed, and vortex-induced vibration suppression is realized. The sliding of the three fish-shaped piezoelectric plates around the circular arc chute on an accessory rod with a slideway is not synchronous, the rotation and deformation amplitude of each fish-shaped piezoelectric plate is determined by the current direction and the current speed of the position where the fish-shaped piezoelectric plate is positioned, and the self-adaptive coupling effect in space is presented. The three auxiliary rods with the slide ways are respectively arranged at the two sides of the inflow port of the drainage cover and the two sides of the vertical pipe, so that the inflow is effectively split, and the development of boundary layers at the two sides is interfered. The fish-shaped piezoelectric sheet deforms under the impact of ocean currents to generate current, the current is output to the conductive circular ring coil in the chute ring through the connecting lead of the connecting sliding block and then is transmitted to the direct conductive wire in the accessory rod with the slideway, and the collection and output of the current are completed. Thus, vortex-induced vibration suppression is achieved while the ocean current energy is partially converted into electrical energy output.
By adopting the technical scheme, the invention has the following advantages:
1. when an attack angle exists between the waveform piezoelectric sheet and the ocean current direction, the wave piezoelectric sheet can rotate under the impact of the ocean current to drive the rotary bearing and the drainage cover to rotate, so that the whole device is suitable for the ocean environment with the direction changed.
2. The drainage cover of the device throttles and rectifies the ocean current around the pipe, damages the development of a boundary layer and interferes the formation and development of wake vortexes.
3. The chute ring of the device of the invention slides up and down along the accessory rod with the slideway under the action of homopolar repulsion, thereby damaging the three-dimensional flow-around structure around the vertical pipe and enhancing the vibration inhibition effect.
4. The fish-shaped piezoelectric sheet and the wave-shaped piezoelectric sheet of the device can generate current, and the synchronous power generation effect is realized.
Drawings
FIG. 1 is a schematic perspective view of the device of the present invention;
FIG. 2 is a disassembled view of the device of the present invention;
FIG. 3 is a schematic view of an accessory bar with a slideway of the device of the invention;
FIG. 4 is a schematic illustration of the connection of a smooth accessory rod to a wave-shaped piezoelectric patch of the device of the present invention;
FIG. 5 is a schematic view of a drainage cover of the device of the present invention;
FIG. 6 is a schematic diagram of the connection of the fish-shaped piezoelectric plate and the chute ring of the device of the invention;
FIG. 7 is a schematic view of a chute ring with magnets of the apparatus of the present invention;
fig. 8 is a schematic diagram of the working principle of the device of the present invention.
Wherein, 1-riser; 2-a rotating bearing; 3-wave-shaped piezoelectric sheets; 4-chute rings; 5-fish-shaped piezoelectric plates; 6-an accessory bar with a slideway; 7, a drainage cover; 8-a drainage cover inflow port; 9-a drainage cover outflow hole; 10-smooth accessory bar; 11-a slideway; 12-sliding rails; 13-connecting a sliding block; 14-magnet; 15-a circular chute; 16-a drainage cover slot.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, a synchronous vibration suppression and power generation device combining drainage and sliding pendulum consists of a rotating pendulum system and nine sliding components. The rotary swing system comprises two rotary bearings 2, a smooth auxiliary rod 10, three auxiliary rods 6 with slide ways, a wave-shaped piezoelectric sheet 3 and a drainage cover 7; the sliding component consists of a chute ring 4, two connecting sliding blocks 13 and a fish-shaped piezoelectric plate 5.
The swivel bearing 2 is an inner ring structure and an outer ring structure embedded with ball rollers, four fixing lantern rings uniformly extend out of the outer ring outer wall of the swivel bearing 2 along the circumferential direction and are used for fixing auxiliary rods, and the central axis of one fixing lantern ring coincides with the perpendicular bisector of the inflow port 8 of the drainage cover. An annular drainage cover slot 16 is formed in the end face of the outer ring of the rotary bearing 2, the width of the drainage cover slot 16 is equal to the wall thickness of the drainage cover 7, and the depth of the drainage cover slot 16 is half of the height of the outer ring of the rotary bearing 2. The inner diameter of the rotary bearing 2 is equal to the outer diameter of the vertical pipe 1, and the upper rotary bearing 2 and the lower rotary bearing 2 are sleeved on the outer wall of the vertical pipe 1 according to the height of a drainage cover 7 at intervals.
A smooth auxiliary rod 10 is fixedly arranged between the upper rotating bearing 2 and the lower rotating bearing 2 corresponding to the middle part of the drainage cover outflow hole 9. As shown in fig. 4, the diameter of the smooth auxiliary rod 10 is equal to the diameter of the fixed collar minus twice the thickness of the wave-shaped piezoelectric sheet 3, the wave-shaped piezoelectric sheet 3 is attached to the smooth auxiliary rod 10 in a U shape, and the attached part with the smooth auxiliary rod 10 is longer than the wing parts extending from both sides, and the surfaces of the wing parts of the wave-shaped piezoelectric sheet 3 are wavy. An accessory rod 6 with a slideway is fixedly arranged on each of the three remaining fixed collars of the swivel bearing 2. As shown in fig. 3, four vertical cuboid concave slideways 11 are uniformly arranged on the outer surface of the accessory rod 6 with the slideway along the circumferential direction, the length of the slideways 11 is the length of the accessory rod 6 with the slideway minus the heights of the four rotating bearings 2, and the slideways 11 are vertically and symmetrically arranged in the middle of the accessory rod 6 with the slideway. The diameter of the auxiliary rod 6 with the slide way is equal to that of the fixed lantern ring, and a straight conductive wire is arranged in the auxiliary rod 6 with the slide way, and a straight conductive wire is also arranged in the smooth auxiliary rod 10.
As shown in fig. 5, the drainage cover 7 is a cylinder, and two sides of the drainage cover are respectively provided with a drainage cover inflow port 8 and a drainage cover outflow port 9. The flow inlet 8 of the drainage cover is a long and narrow rectangular flow inlet. The opposite sides of the drainage cover inflow port 8 are symmetrically provided with circular drainage cover outflow holes 9 of a vertical array about a perpendicular bisector, and the central angles corresponding to the drainage cover outflow holes 9 at the two sides are 30 degrees. The drainage cover 7 is inserted into the drainage cover slot 16 of the rotary bearing 2 to be fixed, and the drainage cover outflow holes 9 on two sides of the drainage cover 7 are positioned on one side of the smooth auxiliary rod 10 and are symmetrical with respect to the smooth auxiliary rod 10.
As shown in fig. 6, three sliding components are sleeved on each accessory rod 6 with a slideway. The inner diameter of the chute ring 4 is equal to the diameter of the accessory rod 6 with the slideway, and the chute ring 4 is formed by butt-joint installation of two symmetrical semicircular annular components through bolts. Four slide rails 12 are uniformly distributed on the inner wall of the chute ring 4 along the circumferential direction, and the size of each slide rail 12 is consistent with the size of the concave chute 11 on the surface of the accessory rod 6 with the chute. As shown in fig. 7, an upper magnet 14 and a lower magnet 14 are arranged inside the chute rings 4, the magnetic poles of the magnets 14 adjacent to the two adjacent chute rings 4 are the same, and the chute rings 4 slide up and down along the axis of the accessory rod 6 with the slideway under the action of repulsion of homopolar repulsion. The outer wall of the chute ring 4 is circumferentially provided with two circles of circular arc chute 15, each circle of circular arc chute 15 is internally provided with a connecting slide block 13 which can slide along the circular arc chute 15, and the two connecting slide blocks 13 are in the same vertical plane. The connecting slide block 13 is provided with a buckle extending out of the circular arc chute 15, the side wall of the tail part of the fish-shaped piezoelectric sheet 5 is provided with a bolt hole corresponding to the buckle of the connecting slide block 13, the buckle is fixedly connected with the fish-shaped piezoelectric sheet 5 through a bolt, and the fish-shaped piezoelectric sheet 5 can slide in the chute ring 4 along with the connecting slide block 13.
Connecting wires are buried in the connecting sliding blocks 13, and a conductive circular ring coil is arranged in the middle of the chute ring 4. The current generated by the deformation of the fish-shaped piezoelectric sheet 5 is transmitted to the conductive circular ring coil in the chute ring 4 through the connecting lead of the connecting slide block 13 and then transmitted to the straight conductive wire in the accessory rod 6 with the chute, thus completing the collection and output of the current. The current generated by the wave-shaped piezoelectric plate 3 is transmitted to the straight conductive wire inside the smooth accessory rod 10.
As shown in fig. 8, the synchronous vibration suppression and power generation device using the combination of drainage and sliding pendulum provides a synchronous vibration suppression and power generation method using the combination of drainage and sliding pendulum. When an attack angle exists between the ocean current direction and the waveform piezoelectric plate 3, the waveform piezoelectric plate 3 deforms under the impact of ocean current to generate current and drives the rotary bearing 2 to rotate until the waveform piezoelectric plate 3 winds to the back current side of the vertical pipe 1. The stabilized wave-shaped piezoelectric sheet 3 is positioned on the back flow side, and cuts the wake flow of the three-dimensional piezoelectric sheet 1, so that the development and interference of the wake flow shear layer are destroyed. Meanwhile, the waveform piezoelectric sheet 3 and wake flow generate fluid-solid coupling response, the waveform piezoelectric sheet 3 deforms to generate current, and the current is output through the straight conducting wire in the smooth accessory rod 10.
After the wave-shaped piezoelectric sheet 3 winds to the back flow side, a part of ocean current flows in from the drainage cover inflow port 8, flows to the drainage cover outflow hole 9 along the annular space between the drainage cover 7 and the vertical pipe 1, and flows out from the drainage cover outflow hole 9. Because the drainage cover outflow holes 9 are positioned near boundary layer separation points on two sides, the sea current flow direction and the flow speed sprayed from the drainage cover outflow holes 9 are regulated, disturbance is generated on the back flow side wake flow of the vertical pipe 1, the position of the boundary layer separation points is changed, and the formation and development of vortex are destroyed.
Because the magnetic poles of the magnets 14 adjacent to the two adjacent chute rings 4 are the same, the chute rings 4 slide up and down on the shaft of the auxiliary rod 6 with the slideway under the action of homopolar repulsion, and the three-dimensional structure of the bypass is damaged.
After the fish-shaped piezoelectric sheet 5 is impacted by ocean currents, the fish-shaped piezoelectric sheet slides around the circular arc chute 15 under the drive of the connecting sliding block 13, so that the flow field around the vertical pipe 1 is damaged, boundary layer separation and vortex generation are disturbed, and vortex-induced vibration suppression is realized. The sliding of the three fish-shaped piezoelectric plates 5 around the circular arc-shaped chute 15 on the accessory rod 6 with the slideway is asynchronous, the rotation and deformation amplitude of each fish-shaped piezoelectric plate 5 is determined by the current direction and the current speed of the position where the fish-shaped piezoelectric plate 5 is positioned, and the fish-shaped piezoelectric plate presents a space self-adaptive coupling effect. The three accessory rods 6 with the slide ways are respectively arranged at the two sides of the inflow port 8 of the drainage cover and the two sides of the vertical pipe 1, so that the incoming flow is effectively split, and the development of boundary layers at the two sides is interfered. The fish-shaped piezoelectric sheet 5 deforms under the impact of ocean currents to generate current, the current is output to the conductive circular ring coil in the chute ring 4 through the connecting lead of the connecting slide block 13 and then is transmitted to the straight conductive wire in the accessory rod 6 with the chute, and the collection and output of the current are completed. Thus, vortex-induced vibration suppression is achieved while the ocean current energy is partially converted into electrical energy output.
Examples:
when the device is installed, the lower rotary bearing 2 is sleeved on the outer wall of the vertical pipe 1, and then the drainage cover 7 is fixed on the rotary bearing 2 through the drainage cover slot 16, so that the central axis of one of the fixed lantern rings coincides with the perpendicular bisector of the inlet 8 of the drainage cover.
Then, the smooth accessory rod 10 is inserted into the corresponding fixed lantern rings in the middle of the two drainage cover outflow holes 9, and the waveform piezoelectric sheet 3 is attached to the smooth accessory rod 10 in a U shape, so that the wing parts of the waveform piezoelectric sheet 3 face away from the vertical pipe 1. An accessory rod 6 with a slideway is fixedly arranged on each of the three remaining fixed collars of the swivel bearing 2.
Then, a connecting slide block 13 which can slide along the circular arc chute 15 is arranged in each of the two circles of circular arc chute 15, and the two connecting slide blocks 13 are in the same vertical plane. The upper bolt holes and the lower bolt holes on the side wall of the tail part of the fish-shaped piezoelectric sheet 5 are respectively connected and fixed with the buckles of the connecting slide blocks 13 by bolts.
Then, the chute rings 4 formed by two symmetrical semicircular annular members are respectively sleeved on the auxiliary rods 6 with the slide ways from two sides, and are fixedly connected by bolts, so that four slide rails 12 on the inner wall of the chute rings 4 are respectively inserted into the corresponding slide ways 11. Three sliding components are arranged on the auxiliary rod 6 with the slide way, so that the magnetic poles of the adjacent magnets 14 in the two adjacent slide groove rings 4 are the same.
Finally, the upper rotary bearing 2 is sleeved on the vertical pipe 1, the socket of the drainage cover slot 16 of the rotary bearing 2 is downward, the drainage cover 7 is inserted into the slot of the rotary bearing, and the three accessory rods 6 with slide ways and the smooth accessory rod 10 are respectively inserted into the corresponding fixed lantern rings.
After installation, the riser 1 with the device according to the invention is placed in a marine environment for use. When an attack angle exists between the ocean current direction and the waveform piezoelectric plate 3, the waveform piezoelectric plate 3 deforms under the impact of ocean current to generate current and drives the rotary bearing 2 to rotate until the waveform piezoelectric plate 3 winds to the back current side of the vertical pipe 1. The stabilized wave-shaped piezoelectric sheet 3 is positioned on the back flow side, and cuts the wake flow of the three-dimensional piezoelectric sheet 1, so that the development and interference of the wake flow shear layer are destroyed. Meanwhile, the waveform piezoelectric sheet 3 and wake flow generate fluid-solid coupling response, the waveform piezoelectric sheet 3 deforms to generate current, and the current is output through the straight conducting wire in the smooth accessory rod 10.
After the wave-shaped piezoelectric sheet 3 winds to the back flow side, a part of ocean current flows in from the drainage cover inflow port 8, flows to the drainage cover outflow hole 9 along the annular space between the drainage cover 7 and the vertical pipe 1, and flows out from the drainage cover outflow hole 9. Because the drainage cover outflow holes 9 are positioned near boundary layer separation points on two sides, the sea current flow direction and the flow speed sprayed from the drainage cover outflow holes 9 are regulated, disturbance is generated on the back flow side wake flow of the vertical pipe 1, the position of the boundary layer separation points is changed, and the formation and development of vortex are destroyed.
Because the magnetic poles of the magnets 14 adjacent to the two adjacent chute rings 4 are the same, the chute rings 4 slide up and down on the shaft of the auxiliary rod 6 with the slideway under the action of homopolar repulsion, and the three-dimensional structure of the bypass is damaged.
After the fish-shaped piezoelectric sheet 5 is impacted by ocean currents, the fish-shaped piezoelectric sheet slides around the circular arc chute 15 under the drive of the connecting sliding block 13, so that the flow field around the vertical pipe 1 is damaged, boundary layer separation and vortex generation are disturbed, and vortex-induced vibration suppression is realized. The sliding of the three fish-shaped piezoelectric plates 5 around the circular arc-shaped chute 15 on the accessory rod 6 with the slideway is asynchronous, the rotation and deformation amplitude of each fish-shaped piezoelectric plate 5 is determined by the current direction and the current speed of the position where the fish-shaped piezoelectric plate 5 is positioned, and the fish-shaped piezoelectric plate presents a space self-adaptive coupling effect. The three accessory rods 6 with the slide ways are respectively arranged at the two sides of the inflow port 8 of the drainage cover and the two sides of the vertical pipe 1, so that the incoming flow is effectively split, and the development of boundary layers at the two sides is interfered. The fish-shaped piezoelectric sheet 5 deforms under the impact of ocean currents to generate current, the current is output to the conductive circular ring coil in the chute ring 4 through the connecting lead of the connecting slide block 13 and then is transmitted to the straight conductive wire in the accessory rod 6 with the chute, and the collection and output of the current are completed. Thus, vortex-induced vibration suppression is achieved while the ocean current energy is partially converted into electrical energy output.
Claims (2)
1. A synchronous vibration suppression and power generation device combining drainage and sliding pendulum consists of a rotating pendulum system and nine sliding components; the rotary swing system comprises two rotary bearings (2), a smooth auxiliary rod (10), three auxiliary rods (6) with slide ways, a wave-shaped piezoelectric sheet (3) and a drainage cover (7); the sliding component consists of a chute ring (4), two connecting sliding blocks (13) and a fish-shaped piezoelectric sheet (5); the rotary bearing (2) is of an inner ring structure and an outer ring structure embedded with ball rollers, the inner diameter of the rotary bearing (2) is equal to the outer diameter of the vertical pipe (1), and the upper rotary bearing and the lower rotary bearing (2) are sleeved on the outer wall of the vertical pipe (1) according to the height of a drainage cover (7) at intervals; a smooth accessory rod (10) is fixedly arranged between the upper rotating bearing (2) fixing collars corresponding to the middle part of the drainage cover outflow hole (9); the diameter of the smooth auxiliary rod (10) is equal to the diameter of the fixed sleeve ring minus twice the thickness of the wave-shaped piezoelectric sheet (3), the wave-shaped piezoelectric sheet (3) is attached to the smooth auxiliary rod (10) in a U shape, the attached part of the wave-shaped piezoelectric sheet (3) and the smooth auxiliary rod (10) is longer than the wing parts extending out from two sides, and the surfaces of the wing parts of the wave-shaped piezoelectric sheet (3) are wavy; an accessory rod (6) with a slideway is fixedly arranged on the three remaining fixed lantern rings of the rotary bearing (2); four vertical cuboid concave slide ways (11) are uniformly formed on the outer surface of the accessory rod (6) with the slide way along the circumferential direction, the length of the slide ways (11) is the length of the accessory rod (6) with the slide way minus the height of the four rotary bearings (2), and the slide ways (11) are vertically and symmetrically arranged in the middle of the accessory rod (6) with the slide way; the diameter of the auxiliary rod (6) with the slideway is equal to that of the fixed lantern ring, a straight conductive wire is arranged inside the auxiliary rod (6) with the slideway, and a straight conductive wire is also arranged inside the smooth auxiliary rod (10); the drainage cover (7) is a cylinder, and a drainage cover inflow port (8) and a drainage cover outflow hole (9) are respectively formed on two sides of the drainage cover; the inflow opening (8) of the drainage cover is a long and narrow rectangular inflow opening; circular drainage cover outflow holes (9) of a vertical array are symmetrically formed on the wall surface of the drainage cover (7) at the opposite side of the drainage cover inflow opening (8), and the central angles corresponding to the drainage cover outflow holes (9) at the two sides are 30 degrees; the drainage cover (7) is inserted into a drainage cover slot (16) of the rotary bearing (2) for fixation; three sliding components are sleeved on each accessory rod (6) with a slideway; the inner diameter of the chute ring (4) is equal to the diameter of the accessory rod (6) with the chute, and the chute ring (4) is formed by butt-jointing two symmetrical semicircular annular components through bolts; the method is characterized in that: four fixing lantern rings uniformly extend out of the outer wall of the outer ring of the rotary bearing (2) along the circumferential direction and are used for fixing the auxiliary rod, wherein the central axes of a pair of two fixing lantern rings which are 180 degrees apart along the circumferential direction are positioned on the same vertical plane with the perpendicular bisector of the inflow port (8) of the drainage cover; an annular drainage cover slot (16) is formed in the end face of the outer ring of the rotary bearing (2), the width of the drainage cover slot (16) is equal to the wall thickness of the drainage cover (7), and the depth of the drainage cover slot (16) is half of the height of the outer ring of the rotary bearing (2); the drainage cover outflow holes (9) on two sides of the drainage cover (7) are positioned on one side of the smooth auxiliary rod (10) and are symmetrical relative to the smooth auxiliary rod (10); four sliding rails (12) are uniformly distributed on the inner wall of the sliding chute ring (4) along the circumferential direction, and the sizes of the sliding rails (12) are consistent with the sizes of the concave sliding rails (11) on the surface of the accessory rod (6) with the sliding rails; an upper magnet (14) and a lower magnet (14) are arranged in the chute rings (4), the magnetic poles of the adjacent magnets (14) of the two adjacent chute rings (4) are the same, and the chute rings (4) slide up and down along the axial direction of the accessory rod (6) with the slideway under the action of homopolar repulsion; two circles of circular arc-shaped sliding grooves (15) are formed in the peripheral direction of the outer wall of the sliding groove ring (4), a connecting sliding block (13) capable of sliding along the circular arc-shaped sliding grooves (15) is arranged in each circle of circular arc-shaped sliding grooves (15), and the two connecting sliding blocks (13) are in the same vertical plane; the connecting slide block (13) is provided with a buckle extending out of the circular arc chute (15), the side wall of the tail part of the fish-shaped piezoelectric sheet (5) is provided with a bolt hole corresponding to the buckle of the connecting slide block (13), the buckle is fixedly connected with the fish-shaped piezoelectric sheet (5) through a bolt, and the fish-shaped piezoelectric sheet (5) can slide in the chute ring (4) along with the connecting slide block (13); a connecting lead is buried in the connecting slide block (13), and a conductive circular ring coil is arranged in the middle of the chute ring (4); the current generated by the deformation of the fish-shaped piezoelectric sheet (5) is transmitted to the conductive circular ring coil in the chute ring (4) through the connecting lead of the connecting slide block (13) and then transmitted to the straight conductive wire in the accessory rod (6) with the chute, thus completing the collection and output of the current; the current generated by the wave-shaped piezoelectric sheet (3) is transmitted to the straight conducting wire inside the smooth accessory rod (10) for output.
2. A method for synchronous vibration suppression and power generation by combining drainage and sliding pendulum, which adopts the device for synchronous vibration suppression and power generation by combining drainage and sliding pendulum according to claim 1, and is characterized in that: when an attack angle exists between the ocean current direction and the waveform piezoelectric sheet (3), the waveform piezoelectric sheet (3) deforms under the impact of ocean current to generate current and drives the rotary bearing (2) to rotate until the waveform piezoelectric sheet (3) winds to the back current side of the vertical pipe (1); the stabilized waveform piezoelectric sheet (3) is positioned at the back flow side, and the wake flow of the three-dimensional tube (1) is divided, so that the development and interference of a wake flow shear layer are destroyed; meanwhile, the waveform piezoelectric sheet (3) and wake flow generate fluid-solid coupling response, the waveform piezoelectric sheet (3) deforms to generate current, and the current is output through a straight conducting wire in the smooth accessory rod (10); after the wave-shaped piezoelectric sheet (3) winds to the back flow side, a part of ocean current flows in from the drainage cover inflow port (8), flows to the drainage cover outflow hole (9) along the annular space between the drainage cover (7) and the vertical pipe (1), and flows out from the drainage cover outflow hole (9); because the drainage cover outflow holes (9) are positioned near boundary layer separation points at two sides, the flow direction and the flow speed of the ocean current sprayed from the drainage cover outflow holes (9) are regulated, disturbance is generated on the back flow side wake flow of the three pipes (1), the position of the boundary layer separation points is changed, and the formation and the development of vortex are damaged; because the magnetic poles of the magnets (14) adjacent to the two adjacent chute rings (4) are the same, the chute rings (4) slide up and down in the axial direction of the auxiliary rod (6) with the chute under the action of repulsion of homopolar repulsion, so that the three-dimensional structure of the bypass is damaged; after the fish-shaped piezoelectric sheet (5) is impacted by ocean currents, the piezoelectric sheet slides around the circular arc chute (15) under the drive of the connecting sliding block (13), so that the flow field around the vertical pipe (1) is damaged, boundary layer separation and vortex generation are disturbed, and vortex-induced vibration is inhibited; the sliding of three fish-shaped piezoelectric plates (5) around a circular arc chute (15) is not synchronous on an accessory rod (6) with a slideway, the rotation and deformation amplitude of each fish-shaped piezoelectric plate (5) is determined by the current direction and the current speed of the position where the fish-shaped piezoelectric plate is positioned, and the self-adaptive coupling effect in space is presented; three accessory rods (6) with slide ways are respectively arranged at two sides of an inflow port (8) of the drainage cover and the vertical pipe (1), so that the incoming flow is effectively split, and the development of boundary layers at two sides is interfered; the fish-shaped piezoelectric sheet (5) deforms under the impact of ocean currents to generate current, the current is output to a conductive circular ring coil in the chute ring (4) through a connecting lead connected with the sliding block (13) and then is transmitted to a direct conductive wire in the accessory rod (6) with a slideway, and the collection and output of the current are completed; thus, vortex-induced vibration suppression is achieved while the ocean current energy is partially converted into electrical energy output.
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