Method for welding flange of wind driven generator tower

Abstract

The invention relates to a method for welding a flange of a wind driven generator tower. The method includes steps: A, beveling grooves: taking an inner flange (1) with an upper surface (1-1) and a lower surface (1-2) which are parallel to each other, beveling a Y-shaped groove on the inner side of a horizontal end surface (3), which is parallel to a tower body (2), of the inner flange, and beveling a small V-shaped groove on the outer side of the horizontal end surface (3); and B, welding at the grooves: welding an outer weld joint (4) at the small V-shaped groove beveled on the outer side of the horizontal end surface (3) at first, then dividing an inner weld joint at the Y-shaped groove into three layers to be welded, welding a first-layer inner weld joint (5) at the bottom of the Y-shaped groove, welding a second-layer inner weld joint (6) on the first-layer inner weld joint, and finally welding a third-layer inner weld joint (7) on the second-layer inner weld joint. The inner inclined flange manufactured by the aid of the method is convenient in manufacture, fine in manufacturing quality and high in cost performance.

Description

technical field [0001] The invention relates to a welding method for a flange of a wind power generator tower. The method of the invention is a welding method for ensuring that the inner flange of the tower tube of the wind power generator and the cylinder body of the tower tube are welded to form an inwardly inclined flange. The invention belongs to the technical field of mechanical equipment manufacturing and processing. Background technique [0002] In the field of wind power generation, wind power generators rely on the wind to drive wind rotors to generate electricity. The wind power generator towers are set under the wind turbine host and wind rotors, supporting the wind turbine host and wind rotors weighing tens of tons. According to the regional distribution of the wind field and the height of the main wind area, the height of the wind turbine tower is also different, and there are various heights such as 55m, 60m, 61.5m, 65m, 70m, and 80m. Among them, the height ...

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Problems solved by technology

The above-mentioned existing methods for making inward flanges have the following defects: (1) The inward flange is artificially formed through processing, which is difficult to process, very troublesome to make, time-consuming and laborious, long processing cycle, and labor-intensive for workers , the production quality is poor, and the production cost is high, especially the size of the tower flange is very large, so it is more and more difficult to make the inward flange by this method, and the cost performance is very low; (2) the inward flange produced by the existing method, When the adjacent sections of the tower body are connected by bolts through two flanges, because the joint surfaces of the bolt pairs are not parallel, the connection reliability is affected, and the reliability of the connection of the tower body through the flange is greatly reduced.

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