CN111827508A - Damping adjusting system for flexible wind turbine tower and wind turbine - Google Patents
Damping adjusting system for flexible wind turbine tower and wind turbine Download PDFInfo
- Publication number
- CN111827508A CN111827508A CN202010811248.1A CN202010811248A CN111827508A CN 111827508 A CN111827508 A CN 111827508A CN 202010811248 A CN202010811248 A CN 202010811248A CN 111827508 A CN111827508 A CN 111827508A
- Authority
- CN
- China
- Prior art keywords
- stay cable
- cable
- tower
- anchoring
- sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/20—Side-supporting means therefor, e.g. using guy ropes or struts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Sustainable Energy (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a damping adjusting system for a flexible wind turbine tower and a wind turbine, belonging to the field of wind turbines, and comprising a tower stay cable fixing device, a plurality of damping adjusting units and a control module, wherein: the damping adjusting unit comprises a stay cable, a tower bottom stay cable fixing device, a damping adjusting device and an anchoring device which are connected in sequence; the stay cable comprises a protective sleeve and a stay cable body arranged in the protective sleeve; the tower stay cable fixing device comprises a stay cable fixing barrel section and a plurality of stay cable anchoring structures which are uniformly distributed on the stay cable fixing barrel section in the circumferential direction, and two ends of each stay cable are respectively connected with the stay cable anchoring structures and the tower bottom stay cable fixing device; and the damping adjusting devices are connected with the control module and are jointly controlled by the control module. According to the invention, through the external stay cable, the cable force or displacement signal of the stay cable is acquired through the sensor, so that the vibration amplitude of the whole machine of the onshore wind turbine generator is obviously reduced, the tower load is reduced, the weight of the tower is reduced, and the tower reliability is improved.
Description
Technical Field
The invention relates to the field of wind power generation, in particular to a damping adjusting system for a flexible wind turbine tower and a wind turbine.
Background
The tower is an important component of the wind generating set and is used for supporting parts such as a cabin, an impeller and the like of the wind generating set. Because the wind turbine generator is under the random wind load effect in operation, the tower frame can generate larger amplitude, and the bottom of the tower frame also bears larger bending moment. Along with the continuous increase of the capacity of the onshore wind turbine generator, the self weight of the generator, the diameter of an impeller and the height of a tower are also multiplied, and especially in low wind speed areas, in order to obtain better wind resources, a high or ultrahigh tower of 110m-140m is usually adopted, so that the safe operation of the generator has great challenges.
In order to improve the reliability of the tower structure, the traditional solution is to increase the wall thickness of the tower, increase the diameter of the tower, replace high-strength materials or combine the tower with steel and concrete, but the manufacturing cost is greatly increased, and the transportation safety is also affected by the large increase of the structure size. In order to reduce the overall cost of a wind power project and increase economic benefits, and meanwhile, considering limitations of production, transportation and the like, a flexible tower structure is generally adopted for an ultrahigh tower unit.
Compared with the traditional rigid tower, the flexible tower has the advantages that the wall thickness is relatively thin, the overall structure size is small, and various condition limitations can be met. The first-order frequency of the flexible tower is low, and the first-order frequency of the flexible tower and the crossing frequency of the blades can be overlapped, so that resonance is caused, and the safe operation of the unit is greatly influenced.
For the resonance problem which may be generated by the flexible tower, a mode of adjusting the damping of the tower can be adopted. In the prior art, a damping adjusting device is usually arranged inside a tower or in a nacelle to increase the damping of the tower, and the damping adjusting device absorbs energy generated in the vibration of the tower and the nacelle, but the method can increase the self weight of the tower and the nacelle, cause extra load and reduce the service life of the tower. Meanwhile, the structure of the inside of the tower or the cabin needs to be modified, and the installation difficulty is high. Therefore, additional problems arising in flexible tower damping adjustment need to be further addressed.
Disclosure of Invention
The invention aims to provide a damping adjusting system for a flexible wind turbine tower and a wind turbine comprising the same, wherein the damping adjusting system can reduce the resonance problem through damping adjustment without internally modifying the flexible tower.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
on one hand, the invention provides a damping adjusting system for a flexible wind turbine tower, which comprises an inhaul cable fixing device on the tower, a plurality of damping adjusting units and a control module, wherein:
the damping adjusting unit comprises a stay cable, a tower bottom stay cable fixing device, a damping adjusting device and an anchoring device which are connected in sequence, and the anchoring device is used for being fixed on a foundation;
the stay cable comprises a protective sleeve and a cable body arranged in the protective sleeve, and the cable body is formed by combining a plurality of steel wires;
the tower stay cable fixing device comprises a stay cable fixing barrel section and a plurality of stay cable anchoring structures which are uniformly arranged on the stay cable fixing barrel section in the circumferential direction, the stay cable fixing barrel section is fixedly sleeved on a tower frame of the wind turbine generator, and two ends of each stay cable are respectively connected with the stay cable anchoring structures and the tower bottom stay cable fixing device; the plurality of stay cables are symmetrically distributed with the center line of the tower;
and the plurality of damping adjusting devices are connected with the control module, and the plurality of stay cables and the damping adjusting devices are jointly controlled by the control module.
Further, the damping adjusting unit further comprises a sensor connected with the damping adjusting device, the sensor is a tension and pressure sensor or a displacement sensor, the sensor is also connected with the control module, and the control module controls the damping adjusting device according to data collected by the sensor.
Further, the damping adjusting device comprises a sleeve, fixing supports arranged at two ends of the sleeve, an excitation coil arranged in the sleeve and a push rod connected with the excitation coil, wherein the push rod penetrates through the fixing support at one end of the sleeve to be connected with a stay cable fixing device on the tower, and the fixing support at the other end of the sleeve is connected with an anchoring device.
Further, the anchoring device comprises an anchoring plate and an anchoring bolt, the anchoring plate is embedded into the anchoring foundation, and the anchoring plate is connected with the damping adjusting device through the anchoring bolt.
Furthermore, the tower bottom stay cable fixing device comprises an anchor cup, a locking bolt, a stay cable sleeve, a damping ring and a cable clamp, wherein the damping ring and the cable clamp are arranged in the stay cable sleeve; one end of the inhaul cable sleeve is provided with an outward fixing flange; one end of the anchor cup is positioned in the stay cable sleeve, and the other end of the anchor cup extends out of the fixed flange end of the stay cable sleeve and is matched and fastened with the locking bolt;
the lower end of a protective sleeve of the stay cable penetrates through the damping ring and is fixed through the cable clamp, the stay cable body extends out of the lower end of the protective sleeve and penetrates through an annular hole of the anchor cup, and the anchor cup is axially fixed through the matching of the locking bolt and the fixing flange so as to fix the stay cable body.
Furthermore, the other end of the stay cable sleeve is also provided with a rain cover, and the stay cable penetrates through the rain cover to be connected into the stay cable sleeve.
Further, the outer end of the steel wire is also provided with a protective cover.
Furthermore, the inner end of the anchor cup is also connected with a sealing cover, and the middle part of the sealing cover is provided with a through hole through which a steel wire passes.
Further, the anchor cup is filled with epoxy mortar to fasten the cable body.
Furthermore, a spoke type tension and pressure sensor is further installed on the anchor cup on the outer side of the locking bolt, an anchorage device used for anchoring the end part of the inhaul cable body is further connected to the outer end part of the anchor cup, and the tension and pressure sensor and the anchorage device are fixed on the anchor cup in a matched mode.
Furthermore, the stay cable anchoring structure of the stay cable fixing device on the tower comprises a locking bolt, a stay cable anchoring sleeve, an anchorage device, a cable clamp and a damping ring, wherein the anchorage device is arranged in the stay cable anchoring sleeve and is sequentially connected with the stay cable, the stay cable anchoring sleeve penetrates through the stay cable fixing barrel section and is fixedly connected with the stay cable anchoring sleeve, a flange is arranged at the end part of the stay cable anchoring sleeve positioned in the stay cable fixing barrel section, one end of the anchorage device extends out of the flange end of the stay cable anchoring sleeve, and the anchorage device is axially fixed by the locking bolt and matched with the flange to fix the end part of the stay cable body.
Further, still include the safety cover with cable anchor sleeve's flange joint for the tip steel wire of protection cable body.
Furthermore, the periphery of the stay cable fixing barrel section is also provided with an outer annular reinforcing rib.
Furthermore, an inner annular reinforcing rib is arranged in the middle of the inner wall of the stay cable fixing barrel section.
Furthermore, a plurality of reinforcing ribs along the axial direction are arranged on the inner wall of the stay cable fixing barrel section.
Furthermore, the end part of the stay cable anchoring sleeve positioned outside the stay cable fixing barrel section is also connected with a stay cable protective pipe, so that the stay cable penetrates through the stay cable protective pipe to enter the stay cable anchoring sleeve.
Furthermore, the control module comprises a control box, a microcontroller and a signal conditioner arranged in the control box, a power supply, a switch element and a control and power cable, wherein the microcontroller is used for receiving signals and sending control instructions.
On the other hand, the wind turbine generator comprises a flexible wind turbine generator tower, wherein the flexible wind turbine generator tower is connected with a damping adjusting system of the flexible wind turbine generator tower.
After adopting such design, the invention has at least the following advantages:
(1) the damping adjusting device is connected and fixed by the anchoring device, the stay cable force or displacement signals are collected by the sensor, and closed-loop adjusting control of damping is realized by the controller, so that the vibration amplitude of the whole wind turbine generator on the land is remarkably reduced, the load of the tower is reduced, the weight of the tower is lightened, and the reliability of the tower is improved.
(2) According to the invention, semi-active control of tower damping is realized through the stay cables and the damping devices which are externally arranged on the tower of the wind turbine generator and symmetrically arranged, so that the vibration amplitude of the flexible tower can be reduced, the first-order frequency of the tower is improved, resonance caused by coincidence with the blade crossing frequency is prevented, and the fatigue life of the tower is prolonged.
(3) According to the invention, the stay cable is adopted to bear part of the pulling force, the rigidity requirement of the tower can be reduced, and simultaneously each damping adjusting device is independent of the wind turbine generator tower, so that the wall thickness, the diameter and the like of the tower can be reduced, and the weight and the manufacturing cost of the tower are reduced.
(4) According to the invention, the plurality of stay cables and the damping adjusting device are controlled in a combined manner, so that the overall linkage adjustment of the tower damping can be realized, the extreme working conditions can be favorably met, and the occurrence risk of safety accidents such as tower collapse and the like can be reduced.
Drawings
The foregoing is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description.
FIG. 1 is a front view of the general construction of one embodiment of the flexible wind turbine tower of the present invention;
FIG. 2 is a top plan view of the flexible wind turbine tower overall structure shown in FIG. 1;
FIG. 3 is a schematic structural view of a guy cable fixing cylindrical section on the tower of the present invention;
FIG. 4 is a schematic view, partially in section, of a cable fixing device on a tower of the present invention;
FIG. 5 is a schematic half-sectional view of a tower bottom stay fixing device in accordance with embodiment 1 of the present invention;
FIG. 6 is a schematic view showing the connection of a stay cable and a tower bottom stay cable fixing device, a damping adjusting device and a sensor in embodiment 1 of the present invention;
FIG. 7 is a schematic view, partially in section, of a damping adjustment device according to the present invention;
FIG. 8 is a schematic diagram of a control module of the present invention;
FIG. 9 is a schematic view of the anchor of the present invention;
FIG. 10 is a schematic half-sectional view of a tower bottom stay fixing device in accordance with embodiment 2 of the present invention;
FIG. 11 is a schematic diagram showing the connection of basic units of a damping adjustment system in accordance with embodiment 2 of the present invention;
description of reference numerals: 1-a wind turbine tower; 2-stay cables; 21-a cable body; 22-a protective sleeve; 3-stay cable fixing device on the tower; 31-stay cable fixing cylinder section; 32-outer annular ribs; 33-a cable protection tube; 34-a cable anchoring sleeve; 35-a shock-absorbing ring; 36-a cable clamp; 37-an anchor; 38-a lock nut; 39-a protective cover; 4-tower bottom guy cable fixing device; 41-rain cover; 42-a cable sleeve; 43-a shock-absorbing ring; 44-a cable clamp; 45-anchor cup; 46-a sealing cover; 47-lock nut; 48-an anchorage device; 49-protective cover; 5-damping adjustment means; 51-a damper; 511-push rod; 512-excitation coil; 513-sleeves; 52-pressure-bearing flange; 53-taper pin; 54-a fixed support; 541-fixing a bracket at the end of the push rod; 542-no push rod end fixing support; 55-a sealing ring; 6-a sensor; 7-a control module; 71-a microcontroller; 72-a signal conditioner; 73-a power supply; 74-a switching element; 75-control and power cables, 76-control box; 8-anchoring means; 81-anchoring foundation; 82-an anchor plate; 83-anchor bolt.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The invention provides an embodiment of a damping adjustment system for a flexible wind turbine tower, as shown in fig. 1 to 11, comprising a tower guy cable fixing device 3, a plurality of damping adjustment units and a control module 7, wherein:
the damping adjusting unit comprises a stay cable 2, a tower bottom stay cable fixing device 4, a damping adjusting device 5 and an anchoring device 8 which are connected in sequence, wherein the anchoring device is used for being fixed on a foundation; the stay cable 2 comprises a protective sleeve 22 and a cable body 21 arranged in the protective sleeve 22, wherein the cable body 21 is formed by combining a plurality of steel wires; the tower stay cable fixing device 3 comprises a stay cable fixing barrel section 31 and a plurality of stay cable anchoring structures which are uniformly arranged on the stay cable fixing barrel section 31 in the circumferential direction, the stay cable fixing barrel section 31 is used for being fixedly sleeved on the wind turbine generator tower frame 1, and two ends of each stay cable 2 are respectively connected with the stay cable anchoring structures and the tower bottom stay cable fixing device 4; a plurality of stay cables 2 are symmetrically distributed with the center line of the tower; the plurality of damping adjusting devices 5 are all connected with the control module 7, and the plurality of stay cables and the damping adjusting devices are jointly controlled through the control module 7.
When the damping adjusting device is used, the external stay cable is respectively connected with the wind turbine tower and the damping adjusting device positioned at the bottom of the tower through the fixing device, the damping adjusting device is fixedly connected through the anchoring device, the stay cable force or displacement signal is collected through the sensor, and the closed-loop adjusting control of the damping is realized through the controller, so that the vibration amplitude of the whole wind turbine generator on the land is obviously reduced, the load of the tower is reduced, the weight of the tower is reduced, and the reliability of the tower is improved.
Two embodiments of the invention may be:
example 1:
as shown in fig. 1 and 2, the onshore flexible wind turbine tower adopting stay cables and the damping adjustment system thereof comprise a wind turbine tower 1, stay cables 2, a cable fixing device 3 on the tower, a cable fixing device 4 at the tower bottom, a damping adjustment device 5, a sensor 6 connected with the damping adjustment device, a control module 7 and an anchoring device 8. The tower stay cable fixing device 3 is connected with the wind turbine tower 1 through a high-strength bolt, a plurality of stay cables 2 are arranged at a symmetrical angle with the center line of the wind turbine tower 1, and each stay cable 2, the tower bottom stay cable fixing device 4, the damping adjusting device 5, the sensor 6 connected with the damping adjusting device, the control module 7 and the anchoring device 8 form a damping adjusting system basic unit which is connected with a specific position of the tower stay cable fixing device 3. One end of the stay cable 2 is connected with the cable fixing device 3 on the tower, the other end of the stay cable is connected with the cable fixing device 4 at the bottom of the tower, one end of the damping adjusting device 5 is connected with the sensor 6, and the other end of the damping adjusting device is connected with the anchoring device 8. The damping adjusting device 5 and the sensor 6 are also electrically connected with the control module 7.
Further, the wind turbine generator system tower frame 1 is formed by sequentially connecting a plurality of sections of conical steel thin-wall tower shell sections through flanges, and the flanges are connected through high-strength bolts. The preferred tower height is 110-140 meters. In this embodiment, the tower height is 140 meters.
As shown in fig. 3 and 4, the tower stay fixing device 3 for fixing a stay cable according to the present invention includes a stay fixing cylindrical section 31, an outer annular reinforcing rib 32, a stay protection tube 33, a stay anchoring sleeve 34, a shock absorbing ring 35, a cable clamp 36, an anchor 37, a lock nut 38, and a protective cover 39. The guy cable fixing shell ring 31 is of a cylindrical steel thickened structure, and L-shaped flanges are arranged on two end faces and are used for being connected with the flange of the wind turbine tower 1 in a matched mode. The inner wall of the cable fixing shell ring 31 is provided with reinforcing rib plates which are uniformly arranged in the axial direction and the circumferential direction, namely an inner annular reinforcing rib and an axial reinforcing rib, wherein: the axial reinforcing ribs are annularly arranged along the horizontal plane of the middle section of the inner wall of the inhaul cable fixing barrel section 31 and are welded with the inhaul cable fixing barrel section 31, and the circumferential reinforcing rib plates are symmetrically arranged up and down and are welded with the inhaul cable fixing barrel section 31. For reinforcing structural strength, outer annular strengthening rib 32 is connected with the outer wall welded connection of the fixed shell ring 31 middle section of cable. Preferably, the guy cable fixing barrel section 31 is installed at about 1/3H (H is the height of the tower) from the top end of the tower or 2-3 meters from the swept bottom end of the unit blade. In this embodiment, the installation height of the cable fixing barrel section 31 is 85 meters.
Furthermore, a plurality of cable anchoring sleeves 34 are uniformly arranged in the circumferential direction at the horizontal plane of the middle section of the cable fixing cylindrical section 31 and are used for fixedly connecting the stay cables with the tower frame, so that the balanced loading of each cable is realized. The plurality of cable anchoring sleeves 34 are welded to the cable fixing barrel section 31 and the outer annular reinforcing rib 32. The stay cable anchoring sleeve 34 is internally provided with a damping ring 35 for reducing the vibration of the stay cable, a cable clamp 36 and an anchorage device 37 for fixing the steel wire inside the stay cable 2, the stay cable 2 sequentially passes through annular holes of the stay cable protection tube 33, the damping ring 35, the cable clamp 36 and the anchorage device 37 and is fixed through a locking nut 38, and the anchorage device 37 is filled with epoxy mortar to enhance the anchoring force. The stay cable protection pipe 33 is connected with the stay cable anchoring sleeve 34, and a shock absorption material is filled in a gap between the stay cable protection pipe and the stay cable, so that the vibration of the stay cable is reduced, and the outside of the stay cable is protected. The locking nut 38 cooperates with the cable anchoring sleeve 34 to axially fix the anchor 37, and a protective cover for preventing corrosion is disposed on the end of the stay cable 2. In this embodiment, the same structure for fixing the stay cables 2 to the upper part of the tower is provided at 3 points.
As shown in fig. 2, 4 and 5, the plurality of stay cables 2 are arranged at a symmetrical angle with the central line of the wind turbine tower 1, so that the lateral force generated by random wind is effectively decomposed, the bending moment borne by the tower is reduced, and the load of the tower is reduced. Two ends of the stay cable 2 are respectively connected with a stay cable fixing device 3 on the tower and a stay cable fixing device 4 at the tower bottom. The stay cable 2 includes a cable body 21 and a protective sleeve 22. To reduce the wind-induced vibration, the protective sleeve 22 is a PE protective sleeve. Preferably, the inclined pull cables form 35-50 degrees with the horizontal plane and are uniformly arranged by 3-6 cables. The preferred stay cable 2 is of a steel cable structure, and the inside is formed by combining a plurality of steel wires. In this embodiment, 3 stay cables are arranged in total.
As shown in fig. 5 and 6, the tower bottom stay fixing device 4 of the present invention includes a rain cover 41, a stay sleeve 42, a shock absorbing ring 43, a stay clip 44, an anchor cup 45, a sealing cover 46, a lock nut 47, an anchor 48, and a protective cover 49. The stay cable sleeve 42 is internally provided with a damping ring 43 for reducing the vibration of the stay cable, a cable clamp 44 and an anchor cup 45 for fixing a steel wire inside the stay cable, the stay cable 2 sequentially passes through annular holes of the rain cover 41, the damping ring 43, the cable clamp 44, the sealing cover 46 and the anchor cup 45, the axial fixation is carried out through a locking nut 47, the anchor cup 45 is filled with epoxy mortar to enhance the anchoring force, and an anchor 48 is arranged at the end part of the tension sensor 6 and used for fixing the steel wire at the end part of the stay cable 2. The rain cover 41 is riveted with the stay cable sleeve 42, the sealing cover 46 is connected with the anchor cup 45 through bolts, and the fixed end part of the stay cable 2 is provided with an anti-corrosion protection cover 49.
Further, a sensor 6 is arranged between the locking nut 47 and the anchorage device 48 of the tower bottom guy cable fixing device 4, and is a tension and pressure measuring sensor. The sensor 6 is of a central through hole structure, the end structure of the stay cable 2 penetrates through the central through hole and an annular hole of the pressure-bearing flange 52, one end face of the sensor 6 is matched with the outer end face of the locking nut 47, the other end face of the sensor is matched with the anchor 48 through the pressure-bearing flange 52, the high-strength bolt sequentially passes through the end flange of the stay cable sleeve 42 and the fixing through hole of the sensor 6, the fixing through hole of the pressure-bearing flange 52 is formed, and the axial fixing of the sensor 6, the tower bottom stay cable fixing device 4.
Furthermore, the measuring end face of the sensor 6 is matched with the outer end face of the anchorage device 48, so that the transmission of the tension and pressure of the inhaul cable is realized. The power and control signals of the sensor 6 are connected with the control module 7 through cables. Preferably, the sensor 6 is of an active type and has a spoke-type structure.
As shown in the figures 1, 6 and 7, the basic units of the damping adjustment system jointly act to decompose the bending moment and the load borne by the bottom of the tower, so that the vibration generated by wind is reduced, and the amplitude of the tower is reduced. The damping adjusting device 5 comprises a damper 51, a pressure-bearing flange 52, a taper pin 53, a fixed bracket 54 and a sealing ring 55. The damper 51 is a magnetorheological damper and comprises a push rod 511, an excitation coil 512 and a sleeve 513, when an input signal of the excitation coil 512 changes, the magnetic field intensity of magnetorheological fluid in the damper 51 changes along with the change of the input signal, and the elongation of the push rod 511 changes, so that the damping force of the magnetorheological damper 51 changes.
Further, the pressure-bearing flange 52 is a structure with two symmetrical ends, and the flanges at the two ends are connected through a welded cylindrical steel structure. The push rod 511 is rigidly connected with a fixing hole at one end of the pressure-bearing flange 52 through a taper pin 53, the end part of the taper pin 53 is of a threaded structure, and the end part is fastened by a nut after being fixed. The other end of the bearing flange 52 is connected with the flange of the tower bottom stay cable fixing device 4 through a high-strength bolt, so that the real-time adjustment and transmission of the cable force of the stay cable 2 are realized.
Further, two ends of the damper 51 are provided with fixing brackets 541 and 542, the fixing brackets at the two ends are connected through high-strength bolts, and the non-push rod end fixing bracket 542 is connected with the anchoring foundation bolt 83. The gap between the fixed bracket 54 and the damper 51 is filled with a shock-absorbing material for reducing the vibration of the damper. The fixed support 54 is connected with the sealing ring 55 through bolts, and reinforcing ribs are uniformly arranged on the outer wall of the support.
As shown in fig. 8, the control module 7 of the present invention comprises a microcontroller 71, a signal conditioner 72, a power source 73, a switch element 74, a control and power cable 75, a control box 76 and control software. The control module 7 is used for receiving signals and sending control instructions, and is divided into a master station and a slave station according to functions, and the slave station is used for receiving output signals of a damper and a force measuring sensor in a basic unit of a damping adjustment system to which the slave station belongs, controlling instructions from the master station and sending received input signals to the master station; besides the functions of the slave station, the master station is used for the combined control of a plurality of basic units of the damping adjusting system, thereby effectively realizing the dynamic adjustment of the damping of the whole tower and reducing the load and the amplitude of the tower. The specific control mode is as follows: the output signals of the dampers and the force measuring sensors of the basic units of the damping adjusting systems are received by the microcontroller in real time through the signal conditioner, the main station control software analyzes the stress and the damping force of each stay cable, the main station controller sends control signals to each slave station, the control current or the control voltage of each damper is adjusted through feedback control, the damping force and the elongation of the push rod are adjusted through the dampers receiving the control signals from the slave stations, and further the dynamic adjustment of the tower damping is realized. The preferable master station microcontroller is one of an industrial personal computer, a single chip microcomputer and an FPGA, and the slave station microcontroller is one of a PLC, a single chip microcomputer and an FPGA.
Further, the microcontroller 71, the signal conditioner 72, and the switching element 74 are connected to each other via a control cable, and are connected to the power source 73 via a power cable. The slave station and the master station microcontroller are connected through a control cable. The control module electrical components are housed in a control box 76 connected to the anchoring base.
As shown in fig. 9, the anchoring device 8 of the present invention includes an anchoring base 81, an anchoring plate 82 and an anchoring bolt 83. The anchor bolt 83 passes through the fixing through hole of the anchor plate 82 and is connected with the damper non-push rod end fixing bracket 542, and is arranged in parallel and symmetrically with the center line of the stay cable. The included angle between the anchoring bolt and the pre-embedded plate and the ground is equal to the included angle between the stay cable and the ground. In order to ensure even loading, 4 or 6 bolts are adopted as the anchoring bolts. The anchor plate 82 is embedded within the anchor foundation 81. Preferably, the anchor plate 82 is spaced from the upper surface of the anchor base 81 by a distance of at least 1.2 m. In this embodiment, 4 bolts are used as the anchor bolts.
Example 2:
the difference between this embodiment and embodiment 1 is that in this embodiment, the sensor is a displacement sensor, and is disposed on the end face of the damper bracket, and the control module uses a position signal as a damping adjustment control signal.
As shown in fig. 10, the tower bottom guy cable fixing device 4 according to embodiment 2 of the present invention includes a rain cover 41, a guy cable sleeve 42, a shock absorbing ring 43, a cable clamp 44, an anchor cup 45, a sealing cover 46, a lock nut 47, an anchor 48, and a protective cover 49. The stay cable sleeve 42 is internally provided with a damping ring 43 for reducing the vibration of the stay cable, a cable clamp 44 and an anchor cup 45 for fixing a steel wire inside the stay cable, the stay cable 2 sequentially passes through the annular holes of the rain cover 41, the damping ring 43, the cable clamp 44, the sealing cover 46 and the anchor cup 45 and is axially fixed through the locking nut 47, the anchor cup 45 is filled with epoxy mortar to enhance the anchoring force, and the anchor 48 is arranged at the end part of the anchor cup 45 and is used for fixing the steel wire at the end part of the stay cable 2. The rain cover 41 is riveted with the stay cable sleeve 42, the sealing cover 46 is connected with the anchor cup 45 through bolts, and the fixed end part of the stay cable 2 is provided with an anti-corrosion protection cover 49.
As shown in fig. 10 and 11, the pressure-bearing flange 52 of the damping adjustment device 5 has a symmetrical structure at both ends, and the flanges at both ends are connected by a welded cylindrical steel structure. The push rod 511 is rigidly connected with a fixing hole at one end of the pressure-bearing flange 52 through a taper pin 53, the end part of the taper pin 53 is of a threaded structure, and the end part is fastened by a nut after being fixed. The other end of the pressure-bearing flange 52 is connected with the end flange of the tower bottom stay cable fixing device 4 through a bolt, so that the position of the stay cable 2 is adjusted and transmitted in real time.
Further, two ends of the damper 51 are provided with fixing brackets 541 and 542, the fixing brackets at the two ends are connected through high-strength bolts, and the non-push rod end fixing bracket 542 is connected with the anchoring foundation bolt 83. The gap between the fixed bracket 54 and the damper 51 is filled with a shock-absorbing material for reducing the vibration of the damper. The fixed support 54 is connected with the sealing ring 55 through bolts, and reinforcing ribs are uniformly arranged on the outer wall of the support.
Further, displacement sensor 6 is arranged at the end of the damper push rod end fixing support 541 and is connected with the damper push rod end fixing support 541 through bolts.
The sensor realizes the measurement of the stretching amount of the inhaul cable by measuring the displacement signals of the end surface of the bracket 541 at the end of the push rod of the damper and the end surface of the pressure-bearing flange 52. The power and control signals of the sensor 6 are connected with the control module 7 through cables. Preferably, the sensor 6 is a laser displacement sensor.
As shown in fig. 8 and 11, the control module 7 includes a microcontroller 71, a signal conditioner 72, a power source 73, a switch element 74, a control and power cable 75, a control box 76 and control software. The control module 7 is used for receiving signals and sending control instructions, and is divided into a master station and a slave station according to functions, and the slave station is used for receiving output signals of a damper and a displacement sensor in a basic unit of a damping adjustment system to which the slave station belongs, controlling instructions from the master station and sending received input signals to the master station; besides the functions of the slave station, the master station is used for the combined control of a plurality of basic units of the damping adjusting system, thereby effectively realizing the dynamic adjustment of the damping of the whole tower and reducing the load and the amplitude of the tower. The specific control mode is as follows: the output signals of the dampers and the displacement sensors of the basic units of the damping adjusting systems are received by the microcontroller in real time through the signal conditioner, the master station control software analyzes the position expansion of each stay cable and the damping force of the dampers, the master station controller sends control signals to each slave station, the control current or the control voltage of each damper is adjusted through feedback control, the damping force and the elongation of the push rod are adjusted through the dampers receiving the control signals from the slave stations, and further the dynamic adjustment of the tower damping is realized.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention in any way, and it will be apparent to those skilled in the art that the above description of the present invention can be applied to various modifications, equivalent variations or modifications without departing from the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a damping governing system for flexible wind turbine generator system pylon which characterized in that, includes cable fixing device, a plurality of damping governing unit and a control module on the tower, wherein:
the damping adjusting unit comprises a stay cable, a tower bottom stay cable fixing device, a damping adjusting device and an anchoring device which are connected in sequence, and the anchoring device is used for being fixed on a foundation;
the stay cable comprises a protective sleeve and a cable body arranged in the protective sleeve, and the cable body is formed by combining a plurality of steel wires;
the tower stay cable fixing device comprises a stay cable fixing barrel section and a plurality of stay cable anchoring structures which are uniformly arranged on the stay cable fixing barrel section in the circumferential direction, the stay cable fixing barrel section is fixedly sleeved on a tower frame of the wind turbine generator, and two ends of each stay cable are respectively connected with the stay cable anchoring structures and the tower bottom stay cable fixing device; the plurality of stay cables are symmetrically distributed with the center line of the tower;
and the plurality of damping adjusting devices are connected with the control module, and the plurality of stay cables and the damping adjusting devices are jointly controlled by the control module.
2. The damping adjustment system of the flexible wind turbine tower according to claim 1, wherein the damping adjustment unit further comprises a sensor connected with the damping adjustment device, the sensor is a tension and pressure sensor or a displacement sensor, the sensor is also connected with a control module, and the control module controls the damping adjustment device according to data collected by the sensor.
3. The damping adjustment system of the flexible wind turbine tower according to claim 1 or 2, wherein the damping adjustment device comprises a sleeve, fixing supports installed at two ends of the sleeve, an excitation coil arranged in the sleeve, and a push rod connected with the excitation coil, the push rod penetrates through the fixing support at one end of the sleeve to be connected with the stay cable fixing device on the tower, and the fixing support at the other end of the sleeve is connected with the anchoring device.
4. The damping adjustment system for the flexible wind turbine tower according to any one of claims 1 to 3, wherein the anchoring device comprises an anchoring plate and an anchoring bolt, the anchoring plate is embedded in an anchoring foundation, and the anchoring plate is connected with the damping adjustment device through the anchoring bolt.
5. The damping adjustment system for the flexible wind turbine tower according to any one of claims 1 to 4, wherein the tower bottom stay cable fixing device comprises an anchor cup, a locking bolt, a stay cable sleeve, and a damping ring and a cable clamp which are arranged in the stay cable sleeve; one end of the stay cable sleeve is provided with an outward fixing flange, one end of the anchor cup is positioned in the stay cable sleeve, and the other end of the anchor cup extends out of the fixing flange end of the stay cable sleeve and is matched and fastened with the locking bolt;
the lower end of a protective sleeve of the stay cable penetrates through the damping ring and is fixed through the cable clamp, the stay cable body extends out of the lower end of the protective sleeve and penetrates through an annular hole of the anchor cup, and the anchor cup is axially fixed through the matching of the locking bolt and the fixing flange so as to fix the stay cable body.
6. The damping adjustment system for the flexible wind turbine tower according to claim 5, wherein a rain cover is further arranged at the other end of the stay cable sleeve, and the stay cable penetrates through the rain cover and is connected into the stay cable sleeve;
and/or the outer end of the steel wire is also provided with a protective cover;
and/or the inner end of the anchor cup is also connected with a sealing cover, and the middle part of the sealing cover is provided with a through hole through which a steel wire passes;
and/or the anchor cup is filled with epoxy mortar to fasten the cable body;
and/or a spoke type tension and pressure sensor is further mounted on the anchor cup on the outer side of the locking bolt, an anchorage device used for anchoring the end part of the inhaul cable body is further connected to the outer end part of the anchor cup, and the tension and pressure sensor and the anchorage device are fixed on the anchor cup in a matched mode.
7. The damping adjustment system of the flexible wind turbine tower according to any one of claims 1 to 6, wherein the cable anchoring structure of the cable fixing device on the tower comprises a locking bolt, a cable anchoring sleeve, an anchor, a cable clamp and a damping ring, the anchor is arranged in the cable anchoring sleeve and is sequentially connected with the stay cable, the cable anchoring sleeve penetrates through the cable fixing barrel section and is fixedly connected with the stay cable, a flange is arranged at the end part of the cable anchoring sleeve positioned in the cable fixing barrel section, one end of the anchor extends out of the flange end of the cable anchoring sleeve, and the anchor is axially fixed by the locking bolt and is matched with the flange to fix the end part of the cable body.
8. The damping adjustment system of the flexible wind turbine tower according to claim 7, further comprising a protective cover connected to a flange of the stay cable anchoring sleeve for protecting an end steel wire of the stay cable body;
and/or an outer annular reinforcing rib is further arranged on the periphery of the inhaul cable fixing barrel section;
and/or an inner annular reinforcing rib is arranged in the middle of the inner wall of the inhaul cable fixing cylinder section;
and/or the inner wall of the inhaul cable fixing cylinder section is provided with a plurality of reinforcing ribs along the axial direction;
and/or the end part of the stay cable anchoring sleeve positioned outside the stay cable fixing barrel section is also connected with a stay cable protective pipe, so that the stay cable penetrates through the stay cable protective pipe to enter the stay cable anchoring sleeve.
9. The damping adjustment system for the flexible wind turbine tower according to any one of claims 1 to 8, wherein the control module comprises a control box, a microcontroller and a signal conditioner arranged in the control box, a power supply, a switch element and a control and power cable, and the microcontroller is used for receiving signals and sending control instructions.
10. A wind turbine comprising a flexible wind turbine tower, characterized in that the flexible wind turbine tower is connected with a damping adjustment system of the flexible wind turbine tower according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010811248.1A CN111827508A (en) | 2020-08-13 | 2020-08-13 | Damping adjusting system for flexible wind turbine tower and wind turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010811248.1A CN111827508A (en) | 2020-08-13 | 2020-08-13 | Damping adjusting system for flexible wind turbine tower and wind turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111827508A true CN111827508A (en) | 2020-10-27 |
Family
ID=72918556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010811248.1A Pending CN111827508A (en) | 2020-08-13 | 2020-08-13 | Damping adjusting system for flexible wind turbine tower and wind turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111827508A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113266192A (en) * | 2021-04-13 | 2021-08-17 | 北方工业大学 | Bracing wire reinforcing method for tower body of self-supporting power transmission tower |
| CN115217235A (en) * | 2022-08-23 | 2022-10-21 | 武汉理工大学 | Intelligent vibration reduction system and method for round shell structure |
| CN115262796A (en) * | 2022-08-23 | 2022-11-01 | 武汉理工大学 | Vibration damping device and using method thereof |
| CN117401101A (en) * | 2023-10-24 | 2024-01-16 | 上海中远海运工程物流有限公司 | Weak structure module marine support pad structure and binding method |
| WO2024068844A1 (en) * | 2022-09-28 | 2024-04-04 | Siemens Gamesa Renewable Energy A/S | Dampening system and method for wind turbine installation |
-
2020
- 2020-08-13 CN CN202010811248.1A patent/CN111827508A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113266192A (en) * | 2021-04-13 | 2021-08-17 | 北方工业大学 | Bracing wire reinforcing method for tower body of self-supporting power transmission tower |
| CN115217235A (en) * | 2022-08-23 | 2022-10-21 | 武汉理工大学 | Intelligent vibration reduction system and method for round shell structure |
| CN115262796A (en) * | 2022-08-23 | 2022-11-01 | 武汉理工大学 | Vibration damping device and using method thereof |
| WO2024068844A1 (en) * | 2022-09-28 | 2024-04-04 | Siemens Gamesa Renewable Energy A/S | Dampening system and method for wind turbine installation |
| CN117401101A (en) * | 2023-10-24 | 2024-01-16 | 上海中远海运工程物流有限公司 | Weak structure module marine support pad structure and binding method |
| CN117401101B (en) * | 2023-10-24 | 2024-04-05 | 上海中远海运工程物流有限公司 | Weak structure module marine support pad structure and binding method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111827508A (en) | Damping adjusting system for flexible wind turbine tower and wind turbine | |
| CN212670905U (en) | Damping adjusting system for flexible wind turbine tower and wind turbine | |
| CN105672517B (en) | One kind waves Self-resetting self-supporting tall and slender structure | |
| US8648488B2 (en) | Wind turbine | |
| CN100572670C (en) | Built-in air energy-eliminating shock-absorbing damper | |
| CN102713110A (en) | Monopole tower and wind power generator equipped with monopole tower | |
| CN111868375A (en) | System and method for stabilizing a wind turbine | |
| CN103899499A (en) | Wind turbine generator tower | |
| CN102374138A (en) | Wind turbine anchor element | |
| CN207017162U (en) | Cable-stayed bridge vibration-proof structure | |
| KR20110033143A (en) | Stayed connection for wind turbine | |
| CN209261735U (en) | A kind of outer drag-line tower and the Wind turbines including the tower | |
| CN106088136B (en) | A kind of standoff generation power foundation of wind power of band and its construction technology | |
| WO2015051926A1 (en) | Support device and methods for improving and constructing a support device | |
| CN207701294U (en) | Limiting device, vibration damping device, tower and the wind power generating set of damper | |
| CN109441730A (en) | Tower frame shock absorbing device and pylon including it | |
| CN110832194A (en) | Wind farm with mutually supporting poles | |
| CN203297041U (en) | Device for improving rigidity of wind machine tower | |
| CN202001210U (en) | Conical cylinder tower | |
| CN109707570A (en) | A kind of hybrid blower fan pylon of prefabricated PC lattice concrete filled steel tube | |
| CN209724581U (en) | Tower frame shock absorbing device and pylon including it | |
| CN113692490A (en) | Tower section and method for constructing a tower | |
| CN102269136A (en) | Tower frame of large wind driven generator | |
| CN220452099U (en) | Dragline system, tower assembly and wind generating set | |
| CN219611319U (en) | Transformer substation lightning rod vibration reduction assembly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |