A prefabricated prestressed tower for offshore and onshore wind turbines
A wind turbine, prestressing technology, applied in the installation/support of wind turbine configuration, wind power generation, mechanical equipment, etc., can solve problems such as increased engineering cost, difficulty in manufacturing and transportation, and increased tower quality and cost
Active Publication Date: 2017-05-24
THE FRONTIER TECH RES INST OF TIANJIN UNIV
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Problems solved by technology
[0004] At present, the outer diameter of the steel tower is close to the maximum height limit of 4.5m for road transportation in my country, while the diameter of the steel tower over 100 meters has generally reached about 5m, which brings difficulties in manufacturing and transportation, and makes the project cost At the same time, due to the increase in the wall thickness of the tower body, the quality and cost of the tower have also increased
At present, the cost of the tower accounts for about 18% of the total cost of the wind turbine, but with the increase of the size of the tower, considering factors such as existing transportation conditions and fluctuations in steel prices, its proportion in the total cost of the wind turbine will increase. expand
Method used
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[0021] A prefabricated prestressed tower for offshore and onshore wind turbines, such as Figure 1-4 As shown, the prestressed tower is conical and is composed of multi-section prestressed towers. The longitudinal sections are connected as a whole by prestressed steel strands. Each section of the tower is composed of outer cylinder 1 and inner cylinder 2. It is composed of a hollow layer between the inner and outer cylinders for on-site construction. The tower of each circular segment is made up of four quarter cylinder parts, and the quarter cylinder parts include prestressed cylinders. The outer wall and the inner wall of the prestressing tube are provided with longitudinal prestressing tunnels 3, bolt holes 4 and construction channels 5. When the arc section is prefabricated, it is equipped with circumferential prestressing ribs and reserved bolt connection holes. There are 4 arc sections in each segment The towers are connected by bolts to form a whole, and all parts are p...
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An assembled prestressed tower drum for offshore and onshore wind turbine generators is cone drum-shaped and is formed by combining multiple segments of prestressed tower drums, wherein the longitudinal segments are connected into a whole by prestress wires, each segment of tower drum consists of an outer drum and an inner drum between which a hollow layer is arranged for site construction, the tower drum of each round segment is formed by splicing four quartered drum parts, circumferential prestressed reinforcements are arranged and bolt connection holes are reserved during arc section prefabrication, four arc-section tower drums of each segment are connected into a whole by bolts, and all the prefabricated parts are assembled on the spot to form the whole tower drum. The assembled prestressed tower drum has the advantages that the structure is novel; by the hollow layers between the inner and outer drums, the structure weight can be reduced, and the construction is facilitated; each tower drum segment is divided into four blocks which can be prefabricated to form and assembled on the spot, so materials are saved, the transportation cost is reduced, the construction period is effectively shortened, and the construction cost of an onshore wind power plant is reduced.
Description
technical field [0001] The invention relates to a wind turbine tower structure, in particular to an assembled prestressed tower used for offshore and land wind turbines. [0002] technical background [0003] The wind turbine tower is the main load-bearing part of the wind turbine. The top of the tower is connected to the nacelle, the impeller and the hub. At the same time, the bottom of the tower is connected to the foundation of the fan. The load is transferred to the foundation. With the development trend of large-scale wind turbine capacity, larger impeller diameters and taller, larger-diameter towers have become the mainstream trend of wind power development. From the initial 70 or 80 meters, it has now reached 145 meters, and the difficulty of tower construction and installation has further increased. [0004] At present, the outer diameter of steel towers is close to the maximum height limit of 4.5m for road transportation in my country, while the diameter of steel t...
Claims
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IPC IPC(8): F03D13/20F03D13/25
CPCF05B2260/301Y02E10/72Y02E10/727
Inventor 丁红岩练继建张浦阳
Owner THE FRONTIER TECH RES INST OF TIANJIN UNIV