Mixed tower of wind turbine generator set

Abstract

A mixed tower of a wind turbine generator set comprises an upper steelwork tower section, a lower reinforced concrete tower section and a foundation. The upper steelwork tower section and the lower reinforced concrete tower section are connected through flange fasteners. The lower reinforced concrete tower section and the foundation are in split structure and connected through flange fasteners, or the lower reinforced concrete tower section and the foundation are integrally made. The mixed tower of the wind turbine generator set solves the problem of complexity in processing of a conventional steelwork conical tower and is simple to manufacture and low in requirements for equipment and operators. The mixed tower has more remarkable advantages in corrosion resistance as compared with the conventional steelwork conical tower. First-order inherent frequency f of the mixed tower of the wind turbine generator set is larger than blade passing frequency 3P, resonance between the tower and the blade can be avoided during running, and connecting surfaces of the mixed tower are more than 2 fewer than those of the conventional steelwork conical tower, and failure risk in flange fastening connection is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of wind power generation technology and equipment, in particular to a hybrid tower of a wind power generating set. Background technique [0002] In recent years, wind power generation, a new energy industry, has received extensive attention from governments of various countries, and has developed rapidly. In the wind turbine, the tower plays the role of connecting the main engine and the foundation, and supporting the main engine. Therefore, the quality of the tower directly affects the performance of the whole machine. [0003] At present, the wind turbine tower mainly adopts the steel cone structure, which is cut by steel plate---groove processing---rolling of barrel section---welding of longitudinal weld of barrel section, flaw detection inspection---barrel Joint trimming --- cylinder joint assembly, girth weld welding, flaw detection inspection --- cylinder joint and flange assembly, girth weld welding,...

AI Technical Summary

Problems solved by technology

[0004] 1. The manufacturing process of this type of tower is complex, with high requirements for the site (professional manufacturing workshop), special equipment and tooling, and high requirements for operators (special operators)

[0005] 2. This kind of tower frame is made of steel, which is easy to corrode and rust, so it must be coated for anti-corrosion

[0007] 4. This type of tower is usually divided into several sections, and the towers are fastened together through flange connections on site. In this way, there are more risks of connection failure if there are too many flange fastening connections (in recent years, several collapses have occurred. The tower incident was due to the failure of the fastening connection)

[0008] 5. With the development trend of large-scale wind turbines and the application of offshore wind power generation, the height and cross-sectional size of towers increase accordingly, making the transportation of such towers more and more difficult

Images