Prestress concrete-steel hybrid tower frame for wind generating set

Abstract

The invention provides a prestress concrete-steel hybrid tower frame for a wind generating set. The hybrid tower frame is combined by an upper steel tower frame and a lower prestress concrete tower frame, large carrying capacity, high stiffness and good economical efficiency can be provided, and the design and using requirements of large unit and high tower frame are met. Different from a cylinder-shaped concrete tower frame in an existing open technology, the concrete tower frame is constituted by a plurality of polygon tower tube sections which are sequentially stacked from bottom to top, and every two adjacent sections are connected in a grouted or bolted mode; each polygon tower tube section is constituted by a plurality of flat-plate-shaped prefabricated tube sheets which are splicedin the annular direction, and production, storing and transporting are easy; the transition section located on the top section of the concrete tower frame adopts a non-sheeting structure, and the section is gradually converted from a polygon to an annular shape from bottom to top so as to optimize structural mechanical performance and facilitate connection with the steel tower frame; and a plurality of beams of prestress bars are arranged in the annular direction of the concrete tower frame, the upper ends of the prestress bars are fixed to a steel tower frame bottom flange, the lower ends ofthe prestress bars are fixed into a foundation, and whole bodies of the prestress bars are pulled.

Description

technical field [0001] The invention relates to the technical field of wind power generator towers, in particular to a prestressed concrete-steel hybrid tower. Background technique [0002] Entering the era of bidding and grid parity, reducing the cost of electricity (LCOE) has become an urgent need and a key factor for the current and future development of wind power. As an important large part of the wind turbine, the competitiveness of the tower has a great impact on the competitiveness of the unit and even the cost of electricity of the entire project. With the development of large-scale wind turbines and the development of wind farms in areas with low wind speed, the market has put forward higher requirements for tower height, safety, reliability and economy. Conventional cylindrical steel towers are facing more and more difficulties in the application of large-capacity units and ultra-high towers due to the limitations of transportation conditions and economy. New ...

AI Technical Summary

Problems solved by technology

Since each piece of mold is made according to the size of the corresponding tube, the size of the mold determines the size of the tower, and any change in the size of the tower requires redesigning and making the mold, which seriously limits the flexibility of concrete tower design and also It has greatly affected the effect of tower customization and optimization design for different projects

Since the mold is in the form of a curved cylinder or cone, the structure is relatively complex, and the component production generally adopts a vertical prefabrication method, the mold is greatly affected by the construction process, resulting in a low reuse rate

In addition, there are many inconveniences in the storage and transportation of the curved tower slices

The above factors make the comprehensive cost of the existing form of prefabricated concrete tower relatively high, which affects its marketing and engineering application

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