CN119288778A - A truss-type offshore floating wind power foundation platform - Google Patents
A truss-type offshore floating wind power foundation platform Download PDFInfo
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- CN119288778A CN119288778A CN202411795560.0A CN202411795560A CN119288778A CN 119288778 A CN119288778 A CN 119288778A CN 202411795560 A CN202411795560 A CN 202411795560A CN 119288778 A CN119288778 A CN 119288778A
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Abstract
The invention relates to the technical field of offshore wind power, in particular to a truss type offshore floating wind power foundation platform which comprises an underframe, a wind turbine generator, a floating foundation and a three-dimensional truss structure, wherein the three-dimensional truss structure comprises a truss main body, a buoyancy tank, a bottom tank, a mooring turret and a mooring system, the buoyancy tank is fixed on two top angles of the underframe, the mooring turret is fixedly connected on the other top angle, the bottom tank is fixedly connected with three top angles of the underframe, and the truss main body is fixedly arranged on the upper surface of the buoyancy tank.
Description
Technical Field
The invention relates to the technical field of offshore wind power, in particular to a truss type offshore floating wind power foundation platform.
Background
The offshore floating wind power foundation is an offshore floating structure for bearing wind turbine generators and matched electromechanical equipment in deep sea wind power generation development activities, and mainly comprises a floating body and a tower, wherein the floating body and the tower keep a safe and stable floating state under the conditions of bearing fan load, environmental load and the like, and the water surface positioning is realized by arranging a plurality of mooring ropes anchored on the seabed.
At present, the Chinese patent application with publication number CN117536792A proposes an offshore floating type fan foundation and an offshore wind driven generator, wherein the offshore floating type fan foundation comprises a wind turbine generator, a supporting structure and a floating body platform, the supporting structure comprises a main supporting rod vertically arranged and at least two auxiliary supporting rods obliquely arranged, the top ends of the main supporting rod and all the auxiliary supporting rods are assembled to form a mounting platform, the wind turbine generator is connected to the mounting platform, the floating body platform comprises at least three floating devices, and the floating devices are connected to the bottom end of the supporting structure in a one-to-one correspondence manner. The wind turbine generator system has the advantages that the supporting structure is arranged to play a supporting role on the wind turbine generator system, a traditional tower barrel structure with larger diameter is replaced, the supporting structure is high in rigidity, high in deformation resistance and low in top acceleration, the inertial force born by the structure is obviously reduced, the weight of the upper structure is obviously reduced, the buoyancy required to be provided by the floating body is reduced, the weight of the floating body platform supported by the lower part is reduced, and the construction cost of the structure is further reduced.
However, the following disadvantages exist in the practical application of the technical scheme:
1. according to the technical scheme, in the wind power generation process, buoyancy change is not obvious when the wind power generation process is inclined under the action of environmental load and wind power load, the recovery moment arm basically does not change along with draft, so that the recovery moment is small, the speed of recovering a stable floating state of a floating foundation on the sea is slow, the rising and sinking amplitude and the swinging inclination angle of the stand column are large, and the wind power generation efficiency and the safe operation of the wind power generation machine are unfavorable.
2. When the real-time wind direction at sea changes, the wind turbine generator set can only rely on the slewing bearing at the top of the tower barrel and the yaw system to actively adjust the direction of the set in real time, and the passive yaw function of active intervention cannot be realized, so that the front windward is kept at the maximum wind sweeping area, and the power generation efficiency is reduced.
Disclosure of Invention
In order to solve the problems that in the wind power generation process, buoyancy changes are not obvious when the wind power generation process is inclined under the action of environmental load and wind power load, so that the speed of a floating type offshore foundation is lower and the power generation efficiency and the safe operation of a fan are influenced, the problem that a fan power unit cannot realize the passive yaw function of active intervention, and the front windward is kept with the maximum wind sweeping area, so that the power generation efficiency is reduced is solved.
The invention provides a truss type offshore floating wind power foundation platform which comprises a bottom frame, a wind turbine generator, a floating foundation and a three-dimensional truss structure, wherein the three-dimensional truss structure comprises a truss main body, a floating box, a bottom box, a mooring turret and a mooring system, the bottom frame is arranged in a regular triangle, the floating box is fixedly connected to the upper surfaces of two top angles of the bottom frame, the floating box is arranged in an inclined manner by 45 degrees, the mooring turret is fixedly connected to the upper surface of the other top angle, the bottom box is fixedly connected with the three top angles of the bottom frame, the truss main body is fixedly arranged on the upper surface of the floating box, and the truss main body is arranged in a 45-degree manner.
The mooring system is used for positioning the truss type offshore floating wind power foundation platform on the sea surface, the wind power generator set is used for wind power generation, and the floating foundation is used for reducing the heave amplitude and the sway inclination angle of the truss type offshore floating wind power foundation platform.
The technical scheme provided by the embodiment of the application at least has the following technical effects:
1. According to the invention, the bottom of the floating box is provided with the disc-shaped part, the diameter edge of the floating box is obviously beyond the floating box, and the discs are connected by the flat box beams, so that the whole bottom box is greatly heave-damped by disturbing surrounding sea water in the motion process of the floating foundation along with sea waves, thereby inhibiting the floating foundation from heave and swinging under the influence of environmental load, and the mooring system is provided to enable the floating wind power foundation platform to passively and coaxially rotate around a mooring single point under the action of wind power, thereby keeping the front face of the wind wheel of the wind turbine always facing the wind, realizing the fully passive yaw function of the wind turbine, indirectly realizing the accurate adjustment of the wind wheel direction of the fixed installation unit, eliminating the yaw transmission components such as a large-diameter rotary gear ring, a yaw motor, a gear box and the like which are necessary for the traditional wind turbine, reducing potential fault points, and realizing the optimization of the reliability and maintainability of the system.
2. Through setting up two main ducts outside slope and placing, make the top form great interval so that install two large-scale wind turbine generator systems, simultaneously when wind-force and wave direction difference are great, through output and wind wheel resistance of two fans of independent adjustment, thereby form the yaw moment, realize the passive yawing function of initiative intervention, acquire the highest generating efficiency with the biggest area of sweeping the wind, be 45 setting through setting up upper portion bracing, lower part stull and truss main part, make the position of buoyancy tank water plane change along with the draught of float formula basis, make float formula basis restoring moment increase, thereby make float formula basis resume stable floating state speed accelerate, make stand heave range and rocking inclination less simultaneously, fan generating efficiency and safe operation have been ensured, in addition, through setting up upper portion bracing and lower part stull all be flat pipe fitting, make the little cross-section intensity that keeps when facing the wind area of float formula wind power foundation platform realization.
3. The wind turbine generator system adopts two small fans which are separately arranged to form a high-power floating wind power system, the gravity center elevation of the wind turbine generator system is reduced to about 140 meters from about 200 meters, the diameter of a wind wheel is reduced to about 200 meters from about 300 meters, and the fans are distributed on two sides of a floating foundation while the load of the fans is reduced, so that the floating foundation is beneficial to light weight and miniaturization, and the production cost is saved.
In some embodiments, the floating foundation comprises a lower cross brace and an upper diagonal brace, the lower cross brace comprises a first cross brace, a second cross brace and a third cross brace, the first cross brace and the second cross brace are fixedly connected between the mooring turret and the buoyancy tank, the third cross brace is fixedly connected between the buoyancy tank, the connection of the first cross brace, the second cross brace and the third cross brace is in a regular triangle arrangement, the connected regular triangle is located right above the underframe, and the upper diagonal brace is located above the lower cross brace.
In some embodiments, the upper diagonal bracing comprises a first diagonal bracing, a second diagonal bracing, a third diagonal bracing and a fourth diagonal bracing, the first diagonal bracing and the second diagonal bracing are fixedly connected between the truss main body and the mooring turret, one ends of the first diagonal bracing and the second diagonal bracing are positioned at the upper top end of the truss main body, the third diagonal bracing and the fourth diagonal bracing are fixedly connected between the truss main body and the buoyancy tank, and the third diagonal bracing and the fourth diagonal bracing are arranged in a staggered manner.
In some embodiments, a fixing assembly is further provided between the truss body and the upper diagonal brace, the fixing assembly includes a first fixing rod, a second fixing rod, a third fixing rod, and a fourth fixing rod, the first fixing rod is fixedly installed between the truss body and the first diagonal brace, the second fixing rod is fixedly installed between the truss body and the second diagonal brace, the third fixing rod is fixedly installed between the truss body bottom end and the first diagonal brace bottom end, and the fourth fixing rod is fixedly installed between the truss body bottom end and the second diagonal brace bottom end.
In some embodiments, the upper top end of the truss main body is also fixedly connected with a main duct, the main duct is arranged in an outward inclined mode, and the wind turbine is fixedly installed inside the main duct.
In some embodiments, the mooring system includes a mooring rope, a single point of mooring, and a mooring anchor point, the single point of mooring is rotatably mounted on a bottom box located at the bottom of the mooring turret, and the single point of mooring is located at the bottom end of the bottom box, the mooring rope is fixedly connected to the single point of mooring, and the mooring anchor point is fixedly connected to an end of the mooring rope remote from the single point of mooring.
In some embodiments, a supporting rod is further arranged between the floating box and the mooring turret, one end of the supporting rod is fixedly connected with the position, close to the bottom, of the floating box, and the other end of the supporting rod is fixedly connected with the position, close to the top, of the mooring turret.
In some embodiments, the upper diagonal brace and the lower diagonal brace are flat pipe fittings, the cross section is oval with two sharp ends, the bottom part of the buoyancy tank is disc-shaped, the diameter edge is obviously beyond the buoyancy tank, the inside of the buoyancy tank is hollow, and ballast water or fixed ballast is arranged in the buoyancy tank.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a truss type offshore floating wind power foundation platform according to an embodiment of the application;
FIG. 2 is a schematic view of a three-dimensional truss structure of a truss type offshore floating wind power foundation platform according to an embodiment of the application;
FIG. 3 is a schematic view of another view angle overall structure of a truss type offshore floating wind power foundation platform according to an embodiment of the present application;
fig. 4 is an enlarged view of a portion a in fig. 3;
FIG. 5 is a schematic diagram of a passive yaw mechanism for active intervention of a truss type offshore floating wind power foundation platform according to an embodiment of the present disclosure;
FIG. 6 is a schematic diagram of a passive yaw of a truss type offshore floating wind power foundation platform according to an example embodiment;
FIG. 7 is a schematic diagram of a restoring moment of a truss type offshore floating wind power foundation platform according to an embodiment of the present application.
Wherein, each reference sign in the figure:
1. The device comprises a chassis, a2 wind turbine generator, a 3, a floating foundation, a 31, a lower cross brace, a 311, a first cross brace, a 312, a second cross brace, a 313, a third cross brace, a 32, an upper cross brace, a 321, a first cross brace, a 322, a second cross brace, a 323, a third cross brace, a 324, a fourth cross brace, a 4, a three-dimensional truss structure, a 41, a truss main body, a 42, a buoyancy tank, a 43, a bottom tank, a 44, a mooring turret, a 45, a mooring system, 451, a mooring rope, 452, a single point of mooring 453, a mooring anchor point, 5, a fixing component, 51, a first fixing rod, 52, a second fixing rod, 53, a third fixing rod, 54, a fourth fixing rod, 6, a main conduit, 7 and a supporting rod.
Detailed Description
In order to reduce the heave amplitude and the sway inclination angle of the upright and realize the passive yaw function of active intervention, the embodiment of the application provides the following scheme.
Referring to fig. 1 to 7 together, an embodiment of the present application provides a truss type offshore floating wind power foundation platform, which includes a chassis 1, a wind turbine generator 2, a floating foundation 3, and a stereoscopic truss structure 4, where the stereoscopic truss structure 4 includes a truss main body 41, a buoyancy tank 42, a bottom tank 43, a mooring turret 44, and a mooring system 45, the chassis 1 is in a regular triangle configuration, the buoyancy tank 42 is fixedly connected to an upper surface of two top corners of the chassis 1, the buoyancy tank 42 is inclined by 45 °, the mooring turret 44 is fixedly connected to an upper surface of another top corner, the bottom tank 43 is fixedly connected to three top corners of the chassis 1, the truss main body 41 is fixedly installed on an upper surface of the buoyancy tank 42, the truss main body 41 is in a 45 ° configuration, the mooring system 45 is used for positioning the truss type offshore floating wind power foundation platform on the sea, the wind turbine generator 2 is used for wind power generation, and the floating foundation 3 is used for reducing a lifting angle and an inclination angle of the truss type offshore floating foundation platform;
Referring to fig. 1 and 2, the floating foundation 3 includes a lower spreader 31 and an upper diagonal brace 32, the lower spreader 31 includes a first spreader 311, a second spreader 312 and a third spreader 313, the first spreader 311 and the second spreader 312 are fixedly connected between the mooring turret 44 and the buoyancy tank 42, the third spreader 313 is fixedly connected between the buoyancy tank 42, the connection of the first spreader 311, the second spreader 312 and the third spreader 313 is in a regular triangle configuration, the connected regular triangle is located right above the underframe 1, the upper diagonal brace 32 is located above the lower spreader 31, the upper diagonal brace 32 includes a first diagonal brace 321, a second diagonal brace 322, a third diagonal brace 323 and a fourth diagonal brace 324, the first diagonal brace 321 and the second diagonal brace 322 are fixedly connected between the main body 41 and the mooring turret 44, one end of the first diagonal brace 321 and one end of the second diagonal brace 322 are located on the main body 41, the third diagonal brace 323 and the fourth diagonal brace 324 are fixedly connected between the third diagonal truss 41 and the fourth diagonal truss 324 and the fourth diagonal truss body 41 are arranged;
The upper diagonal braces 32 and the lower diagonal braces 31 are flat tubular members, the cross sections of the upper diagonal braces and the lower diagonal braces are oval with sharp ends, the bottom of the buoyancy tank 42 is disc-shaped, the diameter edges of the upper diagonal braces and the lower diagonal braces obviously exceed the buoyancy tank 42, the buoyancy tank 42 is hollow, and ballast water or fixed ballast is arranged in the buoyancy tank 42.
Alternatively, in some embodiments, referring to fig. 7, the mooring turret 44 is a cylinder placed vertically at sea level, the truss body 41 is the main structure of the floating foundation 3, and extends from below the water surface to the air, in the form of a rigid solid jacket, the above-water portion thereof;
As can be seen from the above, when the offshore floating wind power foundation platform is subjected to environmental load and wind load, the above-water part of the offshore floating wind power foundation platform changes along with the position change of the water surface box of the buoyancy tank 42, at this time, when the draft of the buoyancy tank 42 increases, the buoyancy of the buoyancy tank 42 increases, and the buoyancy centers of the buoyancy tanks 42 on one side descend, so that the distance between the buoyancy centers of the buoyancy tanks 42 on the two sides increases, the buoyancy arm increases, and the restoring moment L for the buoyancy tank 42 to return to the equilibrium state increases.
The effect of the arrangement is that the bottom part of the floating box 42 is in the shape of a disc, the diameter edge of the floating box is obviously beyond the floating box 42, and the discs are connected by the flat box beams, so that the whole bottom box 43 forms larger heave damping by disturbing the surrounding sea water in the process of moving the floating foundation along with sea waves, thereby inhibiting the heave and the sway of the floating foundation 3 under the influence of environmental load;
through setting up upper portion bracing 32, lower part stull 31 and truss main part 41 and be 45 setting, make the position of buoyancy tank 42 water plane along with floating foundation 3's draft change, make floating foundation 3 resume moment increase, thereby make floating foundation 3 resume stable floating state speed and accelerate, make stand heave range and rocking inclination less simultaneously, ensured fan generating efficiency and safe operation, in addition, through setting up upper portion bracing 32 and lower part stull 31 and be flat pipe fitting, make floating wind power foundation platform keep the same cross-section intensity when realizing little windward area.
In some embodiments, referring to fig. 3 to 6, a main conduit 6 is further fixedly connected to the upper top end of the truss main body 41, the main conduit 6 is disposed in an inclined manner, the wind turbine 2 is fixedly installed inside the main conduit 6, a supporting rod 7 is further disposed between the buoyancy tank 42 and the mooring turret 44, one end of the supporting rod 7 is fixedly connected to a position of the buoyancy tank 42 near the bottom, and the other end of the supporting rod 7 is fixedly connected to a position of the mooring turret 44 near the top;
The mooring system 45 comprises a mooring rope 451, a single mooring point 452 and a anchor mooring point 453, wherein the single mooring point 452 is rotatably mounted on the bottom box 43 positioned at the bottom of the mooring turret 44, the single mooring point 452 is positioned at the bottom end of the bottom box 43, the mooring rope 451 is fixedly connected to the single mooring point 452, and the anchor mooring point 453 is fixedly connected to the end of the mooring rope 451 away from the single mooring point 452.
Optionally, in some embodiments, the main conductors 6 directly under the bases of the two wind turbines 2 are slightly tapered cylinders, the other inclined struts are flat tubular members, and the bottom box 43 is a flat steel structure empty cabin at the bottom of the floating foundation 3 and is submerged under water for a long time;
So set up, when the real-time wind direction of offshore is changed, this offshore floats formula wind power foundation platform receives under the effect of wind force, mooring turret 44 can follow the wind direction and encircle mooring single point 452, passive coaxial rotation, when the fan wind wheel forward windward, mooring turret 44 can stop rotating, when wind force and wave direction gap are great, output and the wind wheel resistance of the fan group that can the independent regulation both sides at this moment, form the yaw moment between the wind turbine group 2 of messenger's both sides, make this offshore float formula wind power foundation platform can rotate with the biggest area of sweeping wind under the effect of wind force and wave.
The effect of the arrangement is that the floating wind power foundation platform passively and coaxially rotates around the mooring single point 452 under the action of wind power through the mooring system 45, so that the wind wheel of the wind turbine always faces the wind, the complete passive yaw function of the wind turbine 2 is realized, the accurate adjustment of the wind wheel direction of the fixedly installed wind turbine is indirectly realized, the essential yaw transmission components such as a large-diameter rotary gear ring, a yaw motor, a gear box and the like of the traditional wind turbine are eliminated, potential fault points are reduced, and meanwhile, the optimization of the reliability and maintainability of the system is realized;
Through setting up two leading pipe 6 outside slope and placing, make the top form great interval in order to install two large-scale wind turbine generator systems 2, simultaneously when wind-force and wave direction difference are great, through output and the wind wheel resistance of two fans of independent adjustment to form the yaw moment, realize the passive yawing function of initiative intervention, acquire the highest generating efficiency with the biggest area of sweeping the wind.
In some embodiments, referring to fig. 2, a fixing assembly 5 is further disposed between the truss main body 41 and the upper diagonal brace 32, the fixing assembly 5 includes a first fixing rod 51, a second fixing rod 52, a third fixing rod 53, and a fourth fixing rod 54, the first fixing rod 51 is fixedly installed between the truss main body 41 and the first diagonal brace 321, the second fixing rod 52 is fixedly installed between the truss main body 41 and the second diagonal brace 322, the third fixing rod 53 is fixedly installed between the bottom end of the truss main body 41 and the bottom end of the first diagonal brace 321, and the fourth fixing rod 54 is fixedly installed between the bottom end of the truss main body 41 and the bottom end of the second diagonal brace 322;
The effect of this arrangement is that by providing the first fixing rod 51, the second fixing rod 52, the third fixing rod 53 and the fourth fixing rod 54, the truss main body 41, the upper diagonal brace 32, the lower diagonal brace 31, the buoyancy tank 42, the bottom tank 43, the mooring turret 44 and the like for supporting the wind turbine generator 2 can be made to form an integral structure, so that the offshore floating wind power foundation platform is integrally designed, and the stability of the offshore floating wind power foundation platform and the connection firmness between the structures are reinforced.
The working principle of the application is as follows:
The plurality of mooring ropes 451 and the mooring anchor points 453 which are arranged in all directions and fixedly connected below the mooring single point 452 realize the accurate positioning of a plane on the mooring turret 44, when the offshore floating wind power foundation platform is subjected to environmental load and wind load, the part above the water surface of the offshore floating wind power foundation platform can follow the change under the position change of the water surface box of the floating box 42, at the moment, when the draft of the floating box 42 is increased, the buoyancy of the floating box 42 and the buoyancy arm of a buoyancy heart are increased at the same time, the restoring moment for the floating box 42 to return to a balanced state is increased, so that the speed of the floating foundation 3 in a stable floating state is accelerated, the rising and sinking amplitude of a stand column and the swinging and tilting angle are smaller, the power generation efficiency and the safe operation of a fan are ensured, and in addition, in the process of being subjected to the environmental load and wind load, the upper inclined struts 32 and the lower horizontal struts 31 are flat pipe fittings, so that the floating wind power foundation platform realizes a small windward area and maintains the same section strength;
in the process of moving along with sea waves, the bottom part of the buoyancy tank 42 is disc-shaped, the diameter edge of the buoyancy tank 42 is obviously beyond the diameter edge of the buoyancy tank 42, and the discs are connected by flat tank beams, so that the whole bottom tank 43 forms larger heave damping by disturbing surrounding sea water in the process of moving along with the sea waves of the floating foundation, and the heave and the sway of the floating foundation 3 under the influence of environmental load are restrained.
When the real-time wind direction at sea changes, the mooring turret 44 can rotate around the mooring single point 452 passively and coaxially along with the wind direction under the action of wind force, when the wind wheel of the fan positively faces the wind, the mooring turret 44 can stop rotating, when the difference between the wind force and the wave direction is large, the output power and the wind wheel resistance of the wind turbine electric groups at two sides can be independently adjusted at the moment, so that a deflection moment is formed between the wind turbine groups 2 at two sides, and under the action of the deflection moment and the liquid moment, the offshore floating wind power foundation platform can rotate with the largest wind sweeping area under the action of wind force and wave, and the highest power generation efficiency is obtained.
The above embodiments are not intended to limit the scope of the invention, so that the equivalent changes of the structure, shape and principle of the invention are covered by the scope of the invention.
Claims (8)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202411795560.0A CN119288778A (en) | 2024-12-09 | 2024-12-09 | A truss-type offshore floating wind power foundation platform |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202411795560.0A CN119288778A (en) | 2024-12-09 | 2024-12-09 | A truss-type offshore floating wind power foundation platform |
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| CN202411795560.0A Pending CN119288778A (en) | 2024-12-09 | 2024-12-09 | A truss-type offshore floating wind power foundation platform |
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| CN115384712A (en) * | 2022-09-06 | 2022-11-25 | 中交第三航务工程局有限公司 | Semi-submersible floating type wind power generation device |
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2024
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| DE102009040648A1 (en) * | 2009-09-09 | 2011-03-10 | Wilhelm Ebrecht | Floatable off shore-wind power plant, has constructional unit arranged at floatable body and comprising poles, at which rotor is supported in rotatable manner, where poles comprise drop-shaped cross sectional contour |
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| CN107709152A (en) * | 2015-06-19 | 2018-02-16 | 原理动力有限公司 | The floating wind turbine platform structure that optimization with seaway load and wind load is transmitted |
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