CN210152833U - Fan tower drum with dynamic vibration absorber - Google Patents
Fan tower drum with dynamic vibration absorber Download PDFInfo
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- CN210152833U CN210152833U CN201920517544.3U CN201920517544U CN210152833U CN 210152833 U CN210152833 U CN 210152833U CN 201920517544 U CN201920517544 U CN 201920517544U CN 210152833 U CN210152833 U CN 210152833U
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- 239000006096 absorbing agent Substances 0.000 title claims abstract description 134
- 239000007788 liquid Substances 0.000 claims abstract description 93
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims abstract description 53
- 235000017491 Bambusa tulda Nutrition 0.000 claims abstract description 53
- 241001330002 Bambuseae Species 0.000 claims abstract description 53
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims abstract description 53
- 239000011425 bamboo Substances 0.000 claims abstract description 53
- 230000001133 acceleration Effects 0.000 claims description 37
- 238000010521 absorption reaction Methods 0.000 claims description 21
- 238000003860 storage Methods 0.000 claims description 20
- 238000013016 damping Methods 0.000 claims description 9
- 230000004044 response Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 238000001514 detection method Methods 0.000 description 10
- 230000035939 shock Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 206010057175 Mass conditions Diseases 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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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
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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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
- Y02E10/70—Wind energy
- Y02E10/728—Onshore wind turbines
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Abstract
The utility model discloses a fan tower section of thick bamboo with dynamic vibration absorber, fan tower section of thick bamboo include tower cylinder body and dynamic vibration absorber, the dynamic vibration absorber set up in the inside of tower cylinder body, the dynamic vibration absorber links to each other with the inner wall of tower cylinder body, and the dynamic vibration absorber includes the bump leveller box and shakes the connecting piece that shakes, and the inside notes of bump leveller box have liquid bump vibration medium, and bump vibration connecting piece's both ends respectively with the interior wall connection of bump leveller box and tower cylinder body, fan tower section of thick bamboo still include the governing system that adjusts the liquid bump vibration medium quality in the bump leveller box according to the vibration condition of tower cylinder body, and governing system links to each other with the bump leveller box. The utility model discloses a fan tower section of thick bamboo can improve the dynamics response performance of a tower section of thick bamboo, avoid a tower section of thick bamboo to take place first-order resonance and be applicable to super high tower section of thick bamboo design.
Description
Technical Field
The utility model belongs to the technical field of a tower section of thick bamboo, concretely relates to fan tower section of thick bamboo with dynamic vibration absorber.
Background
Along with the continuous increase of the power of the wind turbine, the height of the tower barrel of the wind turbine is higher and higher. In 7 months 2017, Siemens Gamesa successfully installed the highest fan in Thailand throughout Asia, a G114-2.0MW fan with a tower height of 153 meters. As the height of the wind turbine tower is continuously increased, higher requirements are put on the design of the tower. The design of current fan tower section of thick bamboo is mostly through improving structural design in order to improve the dynamics performance, and along with the constantly increase of a tower section of thick bamboo height, the operational environment of fan becomes more complicated, and traditional tower section of thick bamboo hardly satisfies the dynamics performance requirement of super high tower section of thick bamboo, consequently need provide a fan tower section of thick bamboo that can improve its dynamics performance to satisfy the requirement of a constantly growing tower section of thick bamboo height.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is overcome not enough that prior art exists, provide a can improve the dynamics response performance of a tower section of thick bamboo, avoid a tower section of thick bamboo to take place first order resonance and be applicable to the fan tower section of thick bamboo that is equipped with dynamic vibration absorber of super high tower section of thick bamboo design.
In order to solve the technical problem, the utility model provides a technical scheme does:
the utility model provides a fan tower section of thick bamboo with dynamic vibration absorber, fan tower section of thick bamboo includes tower cylinder body and dynamic vibration absorber, dynamic vibration absorber set up in the inside of tower cylinder body, the dynamic vibration absorber links to each other with the inner wall of tower cylinder body, dynamic vibration absorber includes the bump leveller box and shakes the connecting piece that shakes, the inside liquid bump leveller that has annotated of bump leveller box, the both ends of shaking the connecting piece respectively with the interior wall connection of bump leveller box and tower cylinder body, fan tower section of thick bamboo still includes the governing system of the liquid bump leveller quality of bump leveller in adjusting the bump leveller box according to the vibration condition of tower cylinder body, governing system links to each other with the bump leveller box. Dynamic vibration absorber makes fan tower section of thick bamboo possess automatic damping's function, when a tower section of thick bamboo receives the excitation to take place the vibration, the vibration that a tower section of thick bamboo produced can be absorbed to the dynamic vibration absorber, effectively restrain a tower section of thick bamboo and take place first order resonance, thereby the dynamic behavior of a tower section of thick bamboo has been improved, governing system can adjust the liquid mass of the medium of shaking of the interior vibration absorption of vibration absorber box, thereby play the effect of shaking of adjusting the dynamic vibration absorber, make the dynamic vibration absorber can be in time quick response according to the vibration condition of a tower section of thick bamboo body, the dynamic.
Preferably, in the above fan tower, the adjusting system includes a medium storage tank, an input pipeline and an output pipeline, an inlet of the input pipeline is communicated with the medium storage tank, an outlet of the input pipeline is communicated with the vibration absorber box body, an inlet of the output pipeline is communicated with the vibration absorber box body, and an outlet of the output pipeline is communicated with the medium storage tank. The medium storage tank is used for storing liquid vibration absorbing media, and the mass of the liquid vibration absorbing media in the vibration absorber tank is adjusted through the input pipeline and the output pipeline.
The above fan tower cylinder is preferable, the medium storage box is arranged below the vibration absorber box, the input pipeline is provided with a pump and a one-way valve, the output pipeline is provided with an electromagnetic valve, the regulating system further comprises an acceleration sensor for detecting the vibration condition of the tower cylinder body, a liquid level sensor for detecting the liquid level height of the liquid vibration absorbing medium in the vibration absorber box, and a controller for controlling the pump and the electromagnetic valve according to the information of the acceleration sensor and the liquid level sensor, the output end of the acceleration sensor is electrically connected with the input end of the controller, the output end of the liquid level sensor is electrically connected with the input end of the controller, and the output end of the controller is respectively electrically connected with the control ends of the pump and the electromagnetic valve. The acceleration sensor can detect the acceleration of the tower drum body to reflect the vibration condition of the tower drum body, the liquid level sensor can detect the liquid level of the liquid vibration absorbing medium in the vibration absorber box body, the quality of the existing liquid vibration absorbing medium in the vibration absorber box body can be calculated through the liquid level, the controller can judge according to the output of the acceleration sensor and the liquid level sensor, then the pump and the electromagnetic valve are controlled to act, if water is required to be injected into the vibration absorber box body, the electromagnetic valve is closed to open the pump, the liquid vibration absorbing medium in the medium storage box is sent into the vibration absorber box body through the pump, the one-way valve can play a role in preventing water in the vibration absorber from flowing back under gravity, when the quality of the vibration absorber box body is required to be reduced, the pump is closed and the electromagnetic valve is opened, the liquid vibration absorbing medium in the vibration absorber box body can flow, therefore, the mass of the liquid vibration absorbing medium in the vibration absorber box body can be adjusted according to the vibration condition of the tower barrel body.
Preferably, the vibration absorption connecting piece comprises a damper and a spring, one end of the damper and one end of the spring are fixedly connected with the vibration absorber box body, and the other end of the damper and the other end of the spring are fixedly connected with the inner wall of the tower cylinder body. The damping of the damper and the rigidity of the spring are matched with the vibration absorber box body to act together, so that the vibration absorbing effect is better.
The fan tower cylinder is preferably provided with two groups of vibration absorption connecting pieces, the two groups of vibration absorption connecting pieces are symmetrically arranged along the central axis of the vibration absorber box body, and the connecting line direction of the two groups of vibration absorption connecting pieces is consistent with the main wind direction of the fan tower cylinder during working. Because fan tower section of thick bamboo during operation receives the effort that comes from the main wind direction, vibrate more obviously in this direction, the bump leveller box that sets up like this can vibrate along the line direction vibration of two sets of connecting pieces that inhale, and the absorption effect to the ascending vibration of fan main wind is better, and the symmetry sets up the atress of being convenient for to guarantee whole tower section of thick bamboo body and the equilibrium of inhaling the vibrations simultaneously.
The fan tower cylinder is preferably characterized in that the vibration absorber box body is an annular closed container, the central axis of the vibration absorber box body is superposed with the central axis of the tower cylinder body, a supporting plate is fixedly arranged on the inner wall of the middle upper part of the tower cylinder body, a pulley is arranged between the vibration absorber box body and the supporting plate, and the vibration absorber box body is arranged on the supporting plate through the pulley. Specifically, the backup pad sets up the position more than tower cylinder body middle part, and it can also support the power vibration absorber at the well upper portion of tower cylinder body to improve and inhale the effect of shaking. The setting can guarantee the bump leveller box symmetric distribution in tower cylinder body like this, is convenient for balance the effect of absorbing vibration of each direction, and the pulley can minimize bump leveller box vibration in the vertical direction, makes bump leveller box keep the vibration state of relative smoothness in the horizontal direction simultaneously.
Preferably, the support plate comprises a support surface for supporting the pulley and a limiting surface for limiting sliding of the pulley, the support surface is horizontally arranged, and the limiting surface is perpendicular to the support surface. The limiting surface can play the effect of limiting the vibration range and the amplitude of the vibration absorber box body in the horizontal direction, after the limiting surface is arranged, the vibration of the vibration absorber box body in the horizontal direction is not only restrained by the springs and the damper, but also limited by the limiting surface, the vibration absorber box body vibrates in the horizontal direction and is limited between the inner wall of the tower barrel and the limiting surface, and a series of problems caused by the fact that the vibration range of the vibration absorber box body in the tower barrel is too large can be prevented.
Preferably, the mass m of the liquid vibration-absorbing medium in the vibration absorber box is the same as the mass m of the liquid vibration-absorbing medium in the vibration absorber box2Is the mass m of the tower body13 to 5 percent of the total weight of the composition. The mass of the liquid vibration-absorbing medium in the vibration absorber box body is changed, namely the mass of the liquid vibration-absorbing medium in the vibration absorber box body is not less than the mass m of the tower barrel body at the lowest13 percent of the mass m of the tower body, the highest mass of the liquid vibration-absorbing medium in the vibration absorber box body (namely when the vibration absorber box body is filled with the liquid vibration-absorbing medium) is not more than1And 5% of the total weight of the tower, wherein the range is determined by considering the stability and the vibration absorption effect of the tower body.
Preferably, in the wind turbine tower drum, the stiffness coefficient of the spring is K, where K is (0.9-0.94) × m2*w1 2Wherein m is2Is the mass m of the liquid vibration-absorbing medium in the vibration-absorber tank2In units of kg, w1Is the first order natural frequency, w, of the tower body1In Hz and the spring rate K in N/m.
Preferably, the damping coefficient of the damper is (0.22-0.25) N · m/s.
The mass m of the liquid vibration absorption medium in the vibration absorber box body2The stiffness coefficient K of the spring and the damping coefficient of the damper are set in the range, so that the dynamic vibration absorber has the best vibration absorption effect on the whole.
Preferably, the acceleration sensor is mounted at the top end of the tower body. Because when the tower section of thick bamboo body takes place the vibration, the displacement value on tower section of thick bamboo body top is the biggest, sets up acceleration sensor here and is convenient for measure, and the reaction is more sensitive, and measuring result is more accurate.
As a general technical idea, the utility model also provides a control method of the wind turbine tower with the dynamic vibration absorber, which comprises the following steps,
s1, setting an acceleration preset value in the controller;
s2, the acceleration sensor detects the acceleration of the tower drum body and transmits a signal to the controller, the controller compares the detection result of the acceleration sensor with a preset value, meanwhile, the liquid level sensor detects the liquid level of the liquid vibration absorption medium in the vibration absorber box body, and the mass condition of the liquid vibration absorption medium existing in the vibration absorber box body at present is judged;
s3, if the detection result of the acceleration sensor is larger than the preset value and the vibration absorber box body is not filled with the liquid vibration absorbing medium, the controller controls the pump to be opened, and the liquid vibration absorbing medium in the medium storage box is injected into the vibration absorber box body until the detection result of the acceleration sensor is smaller than the preset value or the vibration absorber box body is filled with the liquid vibration absorbing medium;
if the detection result of the acceleration sensor is larger than the preset value and the vibration absorber box body is filled with the liquid vibration absorbing medium, the controller controls the electromagnetic valve to be opened, the liquid vibration absorbing medium in the vibration absorber box body is placed back into the medium storage box until the detection result of the acceleration sensor is smaller than the preset value or the mass m of the liquid vibration absorbing medium in the vibration absorber box body2Mass m less than that of the tower body13.1% of;
if the detection result of the acceleration sensor is smaller than the preset value, the existing state is kept and no action is carried out, and the mass m of the liquid vibration absorbing medium in the vibration absorber box body2Remain unchanged.
The method is characterized in that the method is influenced by different factors, the vibration condition of the tower drum of the fan is different, how to reduce the vibration is different due to the difference of the vibration condition, usually, liquid vibration absorbing media are injected into the vibration absorber box body to improve the quality of the dynamic vibration absorber, so that the effect of improving the vibration absorbing effect can be achieved, and when the detection result of the acceleration sensor is greater than the preset value, the liquid vibration absorbing media are injected into the vibration absorber box body firstlyMedium, if the vibration absorber box body is filled with the liquid vibration absorbing medium, the vibration of the fan tower drum still cannot be effectively absorbed, and the vibration of the fan tower drum cannot be recovered to a normal value, the vibration possibly caused by other factors begins to be discharged, the liquid vibration absorbing medium in the vibration absorber box body begins to be discharged, whether the attempt to reduce the weight can reduce the vibration of the fan tower drum or not is judged, and if the mass m of the liquid vibration absorbing medium in the vibration absorber box body is larger than the mass m of the liquid vibration absorbing medium, the vibration of the fan2Mass m less than that of the tower body13.1% still can't make the vibration of fan tower section of thick bamboo return to normal level, also need to stop to discharge liquid vibration-absorbing medium, make the steady quality of bump leveller box at the minimum, possess the most basic damping effect, play the most basic damping effect.
Compared with the prior art, the utility model has the advantages of:
the utility model discloses a fan tower section of thick bamboo has set up the dynamic vibration absorber of adjustable shock-absorbing capacity in the inside of tower section of thick bamboo body, make fan tower section of thick bamboo possess the function of automatic damping, when a tower section of thick bamboo receives the excitation and takes place the vibration, the vibration absorbing connecting piece that shakes of dynamic vibration absorber and the cooperation of the liquid shock absorption medium in shock absorber box and the shock absorber box, can absorb the vibration that tower section of thick bamboo body produced, effectively restrain a tower section of thick bamboo and take place first order resonance, thereby improve the dynamic performance of a tower section of thick bamboo, because the interior liquid shock absorption medium that injects of shock absorber box, still possess good vibration absorbing effect when having reduced the manufacturing cost of dynamic vibration absorber, and governing system can adjust the quality of the liquid shock absorption medium in the shock absorber box according to the vibration condition of tower section of thick bamboo body, the quality dynamic change of liquid shock absorption medium, thereby make the shock absorption capacity of dynamic vibration absorber also dynamic change, governing system adopts the utility model discloses a control Ability, seek the best effect of absorbing through the quality that changes liquid vibration absorbing medium to make fan tower section of thick bamboo's vibration return normal level fast, have corresponding nimble advantage, the utility model discloses a control method chooses acceleration for use as the parameter of reflection tower section of thick bamboo vibration condition, according to acceleration and the relation of default and the interior current liquid vibration absorbing medium of bump levelly in the bump levelly and smoothly control in real time to the liquid quality of vibration absorbing medium in the bump levelly and smoothly box, with the vibration control of a tower section of thick bamboo in certain within range, be applicable to various vibration conditions, thereby play the effect that improves the dynamic performance and the stability of a tower section of thick bamboo.
Drawings
FIG. 1 is a schematic structural diagram of a wind turbine tower with a dynamic vibration absorber according to an embodiment.
Fig. 2 is a schematic view of the vibration absorber casing in fig. 1 in the direction a.
Illustration of the drawings:
1. a tower barrel body; 11. a support plate; 111. a support surface; 112. a limiting surface; 2. a dynamic vibration absorber; 21. a vibration absorber box body; 211. a pulley; 22. a vibration absorption connecting piece; 221. a damper; 222. a spring; 3. a conditioning system; 31. a media storage box; 32. an input pipe; 321. a pump; 322. a one-way valve; 33. an output pipe; 331. an electromagnetic valve; 34. an acceleration sensor; 35. a controller; 36. a liquid level sensor.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully and specifically with reference to the accompanying drawings and preferred embodiments, but the scope of the present invention is not limited to the following specific embodiments.
As shown in fig. 1 and fig. 2, the fan tower section of thick bamboo with dynamic vibration absorber of this embodiment, fan tower section of thick bamboo includes tower body 1 and dynamic vibration absorber 2, dynamic vibration absorber 2 sets up in tower body 1's inside, dynamic vibration absorber 2 links to each other with tower body 1's inner wall, dynamic vibration absorber 2 includes the bump leveller box 21 and shakes the connecting piece 22, the inside liquid bump leveller that has annotated of bump leveller box 21, the both ends of shaking the connecting piece 22 are connected with bump leveller box 21 and tower body 1's inner wall respectively, fan tower section of thick bamboo still includes the governing system 3 that adjusts the liquid bump leveller medium quality in bump leveller box 21 according to tower body 1's vibration condition, governing system 3 links to each other with bump leveller box 21. Specifically, the liquid vibration absorbing medium is water. The adjusting system 3 dynamically adjusts the mass of the liquid vibration absorbing medium in the vibration absorber box 21 in real time according to the vibration condition of the tower barrel body 1 and by combining the mass of the liquid vibration absorbing medium existing in the vibration absorber box 21.
In the present embodiment, the conditioning system 3 includes a medium storage tank 31, an input pipe 32, and an output pipe 33, an inlet of the input pipe 32 is communicated with the medium storage tank 31, an outlet of the input pipe 32 is communicated with the vibration reducer case 21, an inlet of the output pipe 33 is communicated with the vibration reducer case 21, and an outlet of the output pipe 33 is communicated with the medium storage tank 31.
In this embodiment, the medium storage tank 31 is disposed below the vibration absorber tank 21, the input pipeline 32 is provided with a pump 321 and a check valve 322, the output pipeline 33 is provided with an electromagnetic valve 331, the adjusting system 3 further includes an acceleration sensor 34 for detecting the vibration condition of the tower body 1, a liquid level sensor 36 for detecting the liquid level height of the liquid vibration absorbing medium in the vibration absorber tank 21, and a controller 35 for controlling the pump 321 and the electromagnetic valve 331 according to the information of the acceleration sensor 34 and the liquid level sensor 36, an output end of the acceleration sensor 34 is electrically connected with an input end of the controller 35, an output end of the liquid level sensor 36 is electrically connected with an input end of the controller 35, and an output end of the controller 35 is electrically connected with control ends of the pump 321 and the electromagnetic valve. Specifically, the pump 321 is a pressure pump driven by a motor, an output shaft of the motor is connected with an input shaft of the pressure pump, an inlet of the check valve 322 is connected with an outlet of the pump 321, an outlet of the check valve 322 is connected with a water inlet of the vibration absorber tank 21, the electromagnetic valve 331 is a two-position two-way electromagnetic valve, an inlet of the two-position two-way electromagnetic valve is connected with a water outlet of the vibration absorber tank 21, an outlet of the two-position two-way electromagnetic valve is connected with a water inlet of the medium storage tank 31, and the liquid level sensor 36 is arranged in the vibration absorber.
In this embodiment, the vibration-absorbing connector 22 includes a damper 221 and a spring 222, one end of each of the damper 221 and the spring 222 is fixedly connected to the vibration-absorbing housing 21, and the other end of each of the damper 221 and the spring 222 is fixedly connected to the inner wall of the tower body 1.
In this embodiment, the vibration absorbing connectors 22 are provided with two sets, the two sets of vibration absorbing connectors 22 are symmetrically arranged along the central axis of the vibration absorber box 21, and the connecting direction of the two sets of vibration absorbing connectors 22 is consistent with the main wind direction of the fan tower cylinder during operation. Specifically, as shown in fig. 1, two sets of the vibration-absorbing coupling 22 are provided on the left and right sides of the vibration-absorbing housing 21, the damper 221 and the spring 222 in the same set of the vibration-absorbing coupling 22 are located close to the coupling positions of the vibration-absorbing housing 21 and the tower body 1, and the connecting line of the two sets of the vibration-absorbing coupling 22 in the drawing coincides with the diameter of the vibration-absorbing housing 21 and the diameter of the tower body 1 in the cross section.
In this embodiment, the bump leveller box 21 is the annular airtight container of circle, and the axis of bump leveller box 21 coincides with the axis of tower section of thick bamboo body 1, and fixed being provided with backup pad 11 on the inner wall of upper portion in the tower section of thick bamboo body 1 is equipped with pulley 211 between bump leveller box 21 and the backup pad 11, and bump leveller box 21 is arranged in on backup pad 11 through pulley 211.
In this embodiment, the supporting plate 11 includes a supporting surface 111 for supporting the pulley 211 and a limiting surface 112 for limiting sliding of the pulley 211, the supporting surface 111 is disposed horizontally, and the limiting surface 112 is disposed perpendicular to the supporting surface 111. Specifically, the supporting plate 11 is also circular, the outer edge of the circular supporting plate 11 is fixedly connected with the inner wall of the tower body 1, the inner edge of the circular supporting plate 11 is provided with a limiting surface 112 protruding upwards, and the inner edge of the circular supporting plate 11 is hollow.
In this embodiment, the acceleration sensor 34 is mounted on the top end of the tower body 1.
In the present embodiment, the mass m of the liquid vibration-absorbing medium in the vibration-absorber tank 212Is the mass m of the tower body 113 to 5 percent of the total weight of the composition. In particular, the mass m of the tower body 11150000kg, the mass m of the liquid vibration-absorbing medium in the vibration-absorber casing 212The weight is kept between 4500kg and 7500 kg. The mass of the liquid vibration-absorbing medium in the vibration-absorber tank 21 has a minimum value, i.e. in that case it is ensured that the mass of water in the vibration-absorber tank 21 is not less than 0.03m1So that the vibration-absorbing housing 21 has the most basic vibration-absorbing capacity and does not exceed 0.05m when the vibration-absorbing housing 21 is filled with the liquid vibration-absorbing medium, i.e., when the mass of water in the vibration-absorbing housing 21 is at its maximum1. Since the vibration absorber tank 21 is filled with water, the density of the water is constant, and the volume of the vibration absorber tank 21 does not change, the mass of the water in the vibration absorber tank 21 can be reflected by the liquid level height detected by the liquid level sensor 36.
In this embodiment, the spring 222 has a stiffness coefficient K, which is (0.9-0.94) × m2*w1 2Wherein m is2Is the mass, w, of the liquid vibration-absorbing medium in the vibration-absorber tank 211The first order natural frequency of the tower body 1. In particular, w10.3Hz, and K is 364.5-634.5N/m.
In this embodiment, the damping coefficient of the damper 221 is (0.22 to 0.25) N · m/s.
When the fan tower drum provided with the dynamic vibration absorber is adopted, the control method needs to control the fan tower drum, and comprises the following steps,
s1, setting an acceleration preset value in the controller 35;
s2, the acceleration sensor 34 detects the acceleration of the tower barrel body 1 and transmits a signal to the controller 35, the controller 35 compares the detection result of the acceleration sensor 34 with a preset value, and meanwhile, the liquid level sensor 36 detects the liquid level of the liquid vibration absorbing medium in the vibration absorber box body 21 and judges the mass condition of the liquid vibration absorbing medium existing in the vibration absorber box body 21 at present;
s3, if the detection result of the acceleration sensor 34 is larger than the preset value and the vibration absorber box 21 is not filled with the liquid vibration absorbing medium, the controller 35 controls the pump 321 to be opened, and the liquid vibration absorbing medium in the medium storage tank 31 is injected into the vibration absorber box 21 until the detection result of the acceleration sensor 34 is smaller than the preset value or the vibration absorber box 21 is filled with the liquid vibration absorbing medium;
if the detected result of the acceleration sensor 34 is greater than the preset value and the vibration absorber tank 21 is filled with the liquid vibration absorbing medium, the controller 35 controls the solenoid valve 331 to open to return the liquid vibration absorbing medium in the vibration absorber tank 21 to the medium storage tank 31 until the detected result of the acceleration sensor 34 is less than the preset value or the mass m of the liquid vibration absorbing medium in the vibration absorber tank 212Mass m less than that of the tower body 113.1% of;
if the detected result of the acceleration sensor 34 is less than the preset value, the existing state is maintained and no action is performed, and the mass m of the liquid vibration absorbing medium in the vibration absorber box 212Remain unchanged.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The technical solution of the present invention can be used by anyone skilled in the art to make many possible variations and modifications, or to modify equivalent embodiments, without departing from the scope of the technical solution of the present invention, using the technical content disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention should fall within the protection scope of the technical solution of the present invention.
Claims (9)
1. The utility model provides a fan tower section of thick bamboo with dynamic vibration absorber which characterized in that: the fan tower section of thick bamboo includes tower cylinder body (1) and dynamic vibration absorber (2), dynamic vibration absorber (2) set up in the inside of tower cylinder body (1), dynamic vibration absorber (2) link to each other with the inner wall of tower cylinder body (1), dynamic vibration absorber (2) are including the vibration absorber box (21) and inhale connecting piece (22), the inside liquid medium that shakes of notes of vibration absorber box (21), inhale the inner wall connection of connecting piece (22) with vibration absorber box (21) and tower cylinder body (1) respectively, fan tower section of thick bamboo still includes vibration condition according to tower cylinder body (1) and adjusts governing system (3) of the liquid medium quality that shakes in vibration absorber box (21), governing system (3) link to each other with vibration absorber box (21).
2. The wind turbine tower of claim 1, wherein: the adjusting system (3) comprises a medium storage tank (31), an input pipeline (32) and an output pipeline (33), wherein the inlet of the input pipeline (32) is communicated with the medium storage tank (31), the outlet of the input pipeline (32) is communicated with the vibration absorber box body (21), the inlet of the output pipeline (33) is communicated with the vibration absorber box body (21), and the outlet of the output pipeline (33) is communicated with the medium storage tank (31).
3. The wind turbine tower of claim 2, wherein: the medium storage tank (31) is disposed below the vibration absorber case (21), the input pipeline (32) is provided with a pump (321) and a one-way valve (322), the output pipeline (33) is provided with an electromagnetic valve (331), the adjusting system (3) also comprises an acceleration sensor (34) for detecting the vibration condition of the tower drum body (1), a liquid level sensor (36) for detecting the liquid level height of liquid vibration absorbing medium in the vibration absorber box body (21), and a controller (35) for controlling the pump (321) and the electromagnetic valve (331) according to the information of the acceleration sensor (34) and the liquid level sensor (36), the output end of the acceleration sensor (34) is electrically connected with the input end of the controller (35), the output end of the liquid level sensor (36) is electrically connected with the input end of the controller (35), and the output end of the controller (35) is respectively electrically connected with the control ends of the pump (321) and the electromagnetic valve (331).
4. The wind turbine tower of any one of claims 1 to 3, wherein: the vibration absorption connecting piece (22) comprises a damper (221) and a spring (222), one end of the damper (221) and one end of the spring (222) are fixedly connected with the vibration absorber box body (21), and the other end of the damper (221) and the other end of the spring (222) are fixedly connected with the inner wall of the tower cylinder body (1).
5. The wind turbine tower of claim 4, wherein: the vibration absorption connecting pieces (22) are provided with two groups, the two groups of vibration absorption connecting pieces (22) are symmetrically arranged along the central axis of the vibration absorber box body (21), and the connecting line direction of the two groups of vibration absorption connecting pieces (22) is consistent with the main wind direction of the fan tower cylinder during working.
6. The wind turbine tower of any one of claims 1 to 3, wherein: the vibration absorber box body (21) is a circular ring-shaped closed container, the central axis of the vibration absorber box body (21) coincides with the central axis of the tower cylinder body (1), a supporting plate (11) is fixedly arranged on the inner wall of the middle upper portion of the tower cylinder body (1), a pulley (211) is arranged between the vibration absorber box body (21) and the supporting plate (11), and the vibration absorber box body (21) is arranged on the supporting plate (11) through the pulley (211).
7. The wind turbine tower of claim 6, wherein: the supporting plate (11) comprises a supporting surface (111) used for supporting the pulley (211) and a limiting surface (112) used for limiting the sliding of the pulley (211), the supporting surface (111) is horizontally arranged, and the limiting surface (112) is perpendicular to the supporting surface (111).
8. The wind turbine tower of any one of claims 1 to 3, wherein: the mass m of the liquid vibration-absorbing medium in the vibration absorber box body (21)2Is the mass m of the tower body (1)13 to 5 percent of the total weight of the composition.
9. The wind turbine tower of claim 4, wherein: the spring (222) has a stiffness coefficient K of 0.9 to 0.94 m2*w1 2Wherein m is2Is the mass m of the liquid vibration-absorbing medium in the vibration-absorber tank (21)2In units of kg, w1Is the first order natural frequency, w, of the tower body (1)1In Hz and the stiffness coefficient K of the spring (222) in N/m;
the damping coefficient of the damper (221) is 0.22-0.25 Nm/s.
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| CN201920517544.3U CN210152833U (en) | 2019-04-16 | 2019-04-16 | Fan tower drum with dynamic vibration absorber |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109989892A (en) * | 2019-04-16 | 2019-07-09 | 湖南工程学院 | A kind of blower fan tower barrel and its control method equipped with dynamic vibration absorber |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109989892A (en) * | 2019-04-16 | 2019-07-09 | 湖南工程学院 | A kind of blower fan tower barrel and its control method equipped with dynamic vibration absorber |
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Assignee: Yiyang Aiyi Information Technology Co.,Ltd. Assignor: HUNAN INSTITUTE OF ENGINEERING Contract record no.: X2023980050675 Denomination of utility model: A wind turbine tower equipped with a power absorber Granted publication date: 20200317 License type: Common License Record date: 20231213 |
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Yiyang Chuangxing Technology Co.,Ltd. Assignor: HUNAN INSTITUTE OF ENGINEERING Contract record no.: X2023980052753 Denomination of utility model: A wind turbine tower equipped with a power absorber Granted publication date: 20200317 License type: Common License Record date: 20231219 |
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