CN213711236U - Floating type foundation, multi-impeller wind turbine generator and single-impeller wind turbine generator - Google Patents
Floating type foundation, multi-impeller wind turbine generator and single-impeller wind turbine generator Download PDFInfo
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- CN213711236U CN213711236U CN202022490072.2U CN202022490072U CN213711236U CN 213711236 U CN213711236 U CN 213711236U CN 202022490072 U CN202022490072 U CN 202022490072U CN 213711236 U CN213711236 U CN 213711236U
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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
- Y02E10/727—Offshore wind turbines
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model discloses a floating foundation, a multi-impeller wind turbine generator and a single-impeller wind turbine generator, which comprises a plurality of prestressed concrete foundation arms, a central connecting piece, end connecting pieces and a buoy, wherein the prestressed concrete foundation arms are connected through the central connecting piece at one ends, the other ends are arranged in a radial shape, the other end of each prestressed concrete foundation arm is connected with the end connecting piece, and the buoy is connected to each end connecting piece; the prestressed concrete foundation arm comprises a concrete cylinder and a plurality of prestressed tendons, the prestressed tendons are sleeved on the cylinder wall of the concrete cylinder along the circumferential direction of the concrete cylinder, one end of each prestressed tendon is connected with the end connecting piece, and the other end of each prestressed concrete foundation arm is tensioned through the central connecting piece. The utility model has the advantages of structural strength is high, the stable performance is reliable, the manufacturing degree of difficulty is low and economic nature is good.
Description
Technical Field
The utility model belongs to the technical field of wind power generation's technique and specifically relates to indicate a float formula basis, multiple impeller wind turbine generator system and single impeller wind turbine generator system.
Background
Wind energy is increasingly paid more and more attention as a clean and renewable new energy source all over the world, and wind power generation gradually becomes one of the most extensive and mature power generation modes in new energy technology. Offshore wind power generation has been receiving attention because of its advantages of abundant resources, stable wind speed, and large-scale development. With the development and utilization of wind energy by human beings, wind turbines are gradually turned from offshore to deep and open sea. However, strong winds tend to occur in deep seas far offshore, and thus there is much more room for the development of offshore wind turbines in deep water areas. Whereas existing offshore fixed wind turbine technology is limited to areas with water depths of 30 m. Although this depth may increase, for deep water areas greater than 60m, the fixed fans have not met the economic requirements, and the floating fans on the sea are the most suitable choice for deep water areas.
The floating type fan can fully utilize offshore wind resources, more importantly, provides energy for increasing offshore activities, and the floating type fan becomes a necessary trend for future wind energy utilization. However, the floating type wind turbine is different from a common ocean engineering floating platform, and needs to bear loads such as ocean waves and ocean currents and also needs to bear wind loads transmitted by an upper wind turbine, so that the requirement on a base material is relatively high. At present, the floating type foundation construction material mainly comprises steel, the steel is high in price and poor in corrosion resistance, in order to enable the whole floating type fan to safely operate in the marine environment for more than 20 years, the material corrosion resistance needs to be considered in a key mode, the whole manufacturing cost of the floating type fan is greatly increased due to the factors, the power consumption cost of the whole machine is increased, and competitiveness is lost due to poor economy. Also have a small amount of ordinary reinforced concrete that adopts, because of concrete tensile strength is less than compressive capacity far away, because of the restriction of tensile strength, compressive capacity can not exert the limit, and the concrete volume often is great for whole basic displacement often is bigger than steel construction basis, and basis weight also can be heavier relatively, and in order to can the equilibrium gravity, other increase buoyancy parts cost such as flotation pontoon can rise, and the same greatly increased floats formula fan complete machine cost, increases the kilowatt-hour cost of complete machine.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art, and provides a floating foundation, a multi-impeller wind turbine generator and a single-impeller wind turbine generator, wherein the floating foundation with a prestressed concrete structure is adopted, and prestress is introduced into concrete, so that the cracking of the concrete can be greatly delayed, the bearing capacity and compressive strength of the concrete structure are improved, and the dead weight of the structure can be greatly reduced while the structural stress is satisfied; meanwhile, the concrete has relatively strong corrosion resistance, does not need to be additionally improved in corrosion resistance, can greatly reduce the cost of the whole machine, and has obvious economic advantages.
In order to achieve the above object, the present invention provides a technical solution: a floating foundation comprises a plurality of prestressed concrete foundation arms, a central connecting piece, end connecting pieces and floating bowls, wherein one ends of the prestressed concrete foundation arms are connected through the central connecting piece, the other ends of the prestressed concrete foundation arms are arranged in a radial mode, the other end of each prestressed concrete foundation arm is connected with the end connecting piece, and each end connecting piece is connected with the floating bowl; the prestressed concrete foundation arm comprises a concrete cylinder and a plurality of prestressed tendons, the prestressed tendons are sleeved on the cylinder wall of the concrete cylinder along the circumferential direction of the concrete cylinder, one end of each prestressed tendon is connected with the end connecting piece, and the other end of each prestressed concrete foundation arm is tensioned through the central connecting piece.
Furthermore, the concrete cylinder body comprises a plurality of concrete cylinder sections which are sequentially connected, a plurality of channels for mounting the prestressed tendons are arranged on the cylinder wall of each concrete cylinder section along the circumferential direction of the cylinder wall, the channels on two adjacent concrete cylinder sections correspond to each other one by one, and the prestressed tendons are tensioned by the central connecting piece to tightly connect the plurality of sections of concrete cylinder sections together to form an integral common stress.
Further, the cross section of the concrete shell ring is of a waist-shaped structure.
And furthermore, a sealing element is arranged between two adjacent concrete cylinder sections, the sealing element is arranged between the two concrete cylinder sections through a groove on the end surface of the concrete cylinder section, and the sealing element is positioned on the outer side of the prestressed reinforcement.
A wind turbine generator set with multiple impellers comprises a tower, a fan, a pre-tightening unit and a floating foundation; the lower part of the lower tower is connected with a central connecting piece of the floating foundation, a plurality of upper towers are arranged, the lower parts of the upper towers are connected with the upper part of the lower tower, and the upper parts of the upper towers are uniformly distributed with the lower tower as the center and are inclined outwards relative to the central axis of the lower tower; the upper part of each upper tower is provided with a fan, the fan consists of an impeller and a cabin which are connected with each other, and the impellers are not interfered with each other; the pre-tightening units are connected between two adjacent engine rooms, the pre-tightening units are connected between the engine rooms and the end connecting pieces of the floating foundation, thrust generated by wind load on the plane of a wind wheel of the fan is directly transmitted to the floating foundation through the pre-tightening units, and bending moment of the tower due to the wind load is reduced.
Further, the pre-tightening unit is a steel wire rope or a nylon rope.
Further, the impeller is double-blade, triple-blade or multi-blade.
A single-impeller wind turbine generator comprises a tower frame, a fan, a pre-tightening unit and a floating foundation; the lower part of the tower is connected with a central connecting piece of the floating foundation, the fan is arranged on the upper part of the tower and consists of an impeller and a cabin which are connected with each other, pre-tightening units are connected between the cabin and a plurality of end connecting pieces of the floating foundation, thrust generated by wind load on the plane of a wind wheel of the fan is directly transmitted to the floating foundation through the pre-tightening units, and bending moment of the tower generated by the wind load is reduced.
Further, the pre-tightening unit is a steel wire rope or a nylon rope.
Further, the impeller is double-blade, triple-blade or multi-blade.
Compared with the prior art, the utility model, have following advantage and beneficial effect:
1. the utility model discloses a float formula basis is through introducing prestressing force in the concrete, can postpone the problem that the concrete ftractures greatly, and concrete strength level reaches more than C100, not only improves concrete structure bearing capacity and compressive strength, can alleviate the structure dead weight greatly simultaneously.
2. The utility model discloses a showy formula basis resistance to corrosion is strong. The concrete is a porous material, and the concrete is compacter, and intensity is higher, through the design of special mix proportion concrete, avoids floating the corruption of ordinary reinforcing bar and prestressing tendons in the formula basis, no longer need additionally remove to promote corrosion behavior, but greatly reduced complete machine cost promotes floating wind turbine generator system economic nature.
3. The utility model discloses a showy formula basis is made the degree of difficulty low, through adopting the merogenesis to make, but greatly reduced makes and transports the difficulty.
4. The utility model discloses a float formula basis stable performance is reliable, and is better than steel floating basis durability.
5. The floating foundation of the utility model has wide application, can be used in both shallow water areas and deep water areas; it is suitable for single-impeller fan, double-impeller or multi-impeller fan.
6. The utility model discloses a pretension unit has changed transmission fan wind load transmission path, makes most wind load directly transmit to floating formula basis through the pretension unit, reduces the load that the pylon receives by a wide margin.
Drawings
Fig. 1 is a schematic structural view of the floating foundation of the present invention.
Fig. 2 is the schematic structural diagram of the utility model discloses a two concrete shell ring are connected.
Fig. 3 is a longitudinal sectional view of fig. 2.
Fig. 4 is a partially enlarged view a of fig. 3.
Fig. 5 is a schematic structural view of the wind generating set of the multi-impeller fan of the present invention.
Fig. 6 is a top view of the wind turbine generator system with multiple impeller fans of the present invention.
Detailed Description
The present invention will be further described with reference to the following specific embodiments.
Example one
As shown in fig. 1, the floating foundation in this embodiment includes a plurality of prestressed concrete foundation arms 401, a central connecting member 402, end connecting members 403, and buoys 404, where the prestressed concrete foundation arms 401 are multiple, one ends of the prestressed concrete foundation arms 401 are connected by the central connecting member 402, the other ends are radially arranged, the other end of each prestressed concrete foundation arm 401 is connected to an end connecting member 403, and each end connecting member 403 is connected to a buoy 404; the prestressed concrete foundation arm 401 includes a plurality of concrete cylinders and prestressed tendons (not shown in the figure), the prestressed tendons are sleeved on the cylinder wall of the concrete cylinders along the circumferential direction of the concrete cylinders, one end of each prestressed tendon is connected with an end connector 403, and the other end of each prestressed tendon is tensioned through a central connector 402; the concrete cylinder comprises a plurality of sequentially connected concrete cylinder sections 4011, the cross section of each concrete cylinder section 4011 can be a waist-shaped structure, a rectangular structure or other hollow structures, the waist-shaped structure is preferably selected in the embodiment, as shown in fig. 2, a plurality of pore channels 4012 for mounting prestressed tendons are arranged on the cylinder wall of each concrete cylinder section 4011 along the circumferential direction of the cylinder wall, and the pore channels 4012 on every two adjacent concrete cylinder sections 4011 correspond to one another; a sealing element 4013 is arranged between two adjacent concrete cylinder sections 4011, as shown in fig. 3 and 4, the sealing element 4013 is installed between the two concrete cylinder sections 4011 through a groove on the end face of the concrete cylinder section 4011 and is located on the outer side of the prestressed tendon; the sealing part 4013 has certain elasticity, compressibility and tensile capacity, the multiple sections of concrete cylinder sections 4011 and the sealing part 4013 are tightly connected together by stretching the prestressed tendons under the central connecting part 402 to form an integral common stress, and the sealing part 4013 prevents external water from permeating into the concrete foundation arm 401 through gaps between the concrete cylinder sections 4011.
Example two
As shown in fig. 5 and 6, the multiple-bladed wind turbine generator set according to the present embodiment includes a tower, a wind turbine 2, a pre-tightening unit 3, and a floating foundation according to the first embodiment; the towers comprise an upper tower 101 and a lower tower 102, the lower part of the lower tower 102 is connected with a central connecting piece 402 of a floating foundation, a plurality of upper towers 101 are arranged, the lower parts of the plurality of upper towers 101 are connected with the upper part of the lower tower 102, and the upper parts of the plurality of upper towers 101 are uniformly distributed centering on the lower tower 102 and are inclined outwards relative to the central axis of the lower tower 102; the upper part of each upper tower 101 is provided with a fan 2, the fan 2 consists of an impeller and a cabin which are connected with each other, the impeller can be a double blade, a triple blade or a multi-blade, and a plurality of impellers are not interfered with each other; the pre-tightening units 3 are connected between the engine rooms of every two adjacent fans 2, the pre-tightening units 3 are connected between the end connecting pieces 403 of each engine room and the floating foundation, the pre-tightening units 3 can be steel wire ropes, nylon ropes or other high polymer materials, initial pre-tightening force needs to be applied to each pre-tightening unit 3 after hoisting is completed, the pre-tightening state of each pre-tightening unit 3 is kept not to be loosened all the time under the action of all working condition wind loads through reasonable design of the pre-tightening force, thrust generated by the wind loads on the wind wheel planes of the fans 2 is directly transmitted to the floating foundation through the pre-tightening units 3, and bending moment of a tower due to the wind loads is reduced.
When the draught of the whole unit needs to be adjusted, ballast water can be pumped in or out through the concrete cylinder of the floating foundation, so that the draught of the whole floating fan 2 is changed.
EXAMPLE III
The difference between the single-impeller wind turbine generator set in this embodiment and the multiple-impeller wind turbine generator set in the second embodiment is that: the lower part of the tower is connected with a central connecting piece of the floating foundation; the fan is only one and is arranged at the upper part of the tower.
The above-mentioned embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so that all the changes made according to the shape and principle of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. A floating foundation, which is characterized in that: the prestressed concrete foundation structure comprises a plurality of prestressed concrete foundation arms, a central connecting piece, end connecting pieces and buoys, wherein one ends of the prestressed concrete foundation arms are connected through the central connecting piece, the other ends of the prestressed concrete foundation arms are arranged in a radial mode, the other end of each prestressed concrete foundation arm is connected with one end connecting piece, and each end connecting piece is connected with a buoy; the prestressed concrete foundation arm comprises a concrete cylinder and a plurality of prestressed tendons, the prestressed tendons are sleeved on the cylinder wall of the concrete cylinder along the circumferential direction of the concrete cylinder, one end of each prestressed tendon is connected with the end connecting piece, and the other end of each prestressed concrete foundation arm is tensioned through the central connecting piece.
2. A floating foundation according to claim 1 wherein: the concrete cylinder body comprises a plurality of concrete cylinder sections which are sequentially connected, a plurality of channels for mounting the prestressed tendons are arranged on the cylinder wall of each concrete cylinder section along the circumferential direction of the cylinder wall, the channels on two adjacent concrete cylinder sections correspond to each other one by one, and the prestressed tendons stretch the central connecting piece to tightly connect the concrete cylinder sections together to form a whole common stress.
3. A floating foundation according to claim 2 wherein: the cross section of the concrete shell section is of a waist-shaped structure.
4. A floating foundation according to claim 2 wherein: and a sealing element is arranged between two adjacent concrete shell sections, the sealing element is arranged between the two concrete shell sections through a groove on the end surface of the concrete shell section, and the sealing element is positioned on the outer side of the prestressed tendon.
5. A wind turbine generator with multiple impellers is characterized in that: the floating foundation comprises a tower, a fan, a pre-tightening unit and the floating foundation as claimed in any one of claims 1 to 4; the lower part of the lower tower is connected with a central connecting piece of the floating foundation, a plurality of upper towers are arranged, the lower parts of the upper towers are connected with the upper part of the lower tower, and the upper parts of the upper towers are uniformly distributed with the lower tower as the center and are inclined outwards relative to the central axis of the lower tower; the upper part of each upper tower is provided with a fan, the fan consists of an impeller and a cabin which are connected with each other, and the impellers are not interfered with each other; the pre-tightening units are connected between two adjacent engine rooms, the pre-tightening units are connected between the engine rooms and the end connecting pieces of the floating foundation, thrust generated by wind load on the plane of a wind wheel of the fan is directly transmitted to the floating foundation through the pre-tightening units, and bending moment of the tower due to the wind load is reduced.
6. The multiple-bladed wind turbine according to claim 5, characterized in that: the pre-tightening unit is a steel wire rope or a nylon rope.
7. The multiple-bladed wind turbine according to claim 5, characterized in that: the impeller is double-blade, triple-blade or multi-blade.
8. The utility model provides a single-vane wind turbine generator system which characterized in that: the floating foundation comprises a tower, a fan, a pre-tightening unit and the floating foundation as claimed in any one of claims 1 to 4; the lower part of the tower is connected with a central connecting piece of the floating foundation, the fan is arranged on the upper part of the tower and consists of an impeller and a cabin which are connected with each other, pre-tightening units are connected between the cabin and a plurality of end connecting pieces of the floating foundation, thrust generated by wind load on the plane of a wind wheel of the fan is directly transmitted to the floating foundation through the pre-tightening units, and bending moment of the tower generated by the wind load is reduced.
9. The single-impeller wind turbine generator set according to claim 8, wherein: the pre-tightening unit is a steel wire rope or a nylon rope.
10. The single-impeller wind turbine generator set according to claim 8, wherein: the impeller is double-blade, triple-blade or multi-blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022490072.2U CN213711236U (en) | 2020-11-02 | 2020-11-02 | Floating type foundation, multi-impeller wind turbine generator and single-impeller wind turbine generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022490072.2U CN213711236U (en) | 2020-11-02 | 2020-11-02 | Floating type foundation, multi-impeller wind turbine generator and single-impeller wind turbine generator |
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| Publication Number | Publication Date |
|---|---|
| CN213711236U true CN213711236U (en) | 2021-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022490072.2U Active CN213711236U (en) | 2020-11-02 | 2020-11-02 | Floating type foundation, multi-impeller wind turbine generator and single-impeller wind turbine generator |
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| Country | Link |
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| CN (1) | CN213711236U (en) |
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- 2020-11-02 CN CN202022490072.2U patent/CN213711236U/en active Active
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