Method for the strengthening of a welded connexion, element of tower, tower and wind turbine
A technology for wind turbines, welded joints, applied in the field of strengthening welded joints, elements of towers, towers and wind turbines, capable of solving problems such as poor resistance
Inactive Publication Date: 2009-04-15
SIEMENS AG
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Problems solved by technology
Welds are generally less resistant to fatigue and / or stress loads than flat plate sections of hollow cylindrical elements
Method used
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[0025] figure 1 A conventional welded joint is schematically shown, comprising an X-shaped butt welded joint 1 . The X-shaped butt-weld joint 1 comprises two weld seams 2, 3, one of which is in the form of a first V-shaped butt-welded joint 2 and the other in the form of a second V-shaped butt-welded joint 3 arranged opposite one another. The welded joint connects a part 4 of a first sheet-like part 6 made of steel and a part 5 of a second sheet-like part 7 made of steel.
[0026] The first weld seam 2 comprising the welding material 8 adjoins the first connection region 9 of the part 4 of the first sheet part 6 and adjoins the first connection region 10 of the part 5 of the second sheet part 7 . The second weld seam 3 comprising the welding material 8 adjoins the second connection region 11 of the part 4 of the first sheet part 6 and adjoins the second connection region 12 of the part 5 of the second sheet part 7 . The connection regions 9 - 12 marked with dotted lines are ...
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Abstract
The invention concerns a method of strengthening a welded connexion comprising at least one weld seam (2,3) and / or of increasing of tolerance of a welded connexion in relation to fatigue load which welded connexion joins at least two sections of one component or at least one section (4) of a first component (6) and at least one section (5) of a second component (7) with each other, wherein the geometry of the at least one weld seam (2,3) and of at least one section (4,5) of at least one component (6,7), which at least one section (4,5) adjoins to the at least one weld seam (2, 3), is specifically modified by removing welding material (8) from the at least one weld seam (2,3) and by removing material of the at least one section (4,5) of the at least one component (6,7), which material adjoins to the at least one weld seam (2,3) . The invention relates also to an element for a tower of a wind turbine, to a tower of a wind turbine and to a wind turbine having at least one welded connexion with this modified geometry.
Description
technical field [0001] The present invention relates to a method for strengthening welded joints, including weld seams, and / or for increasing the resistance of welded joints with respect to fatigue loads. The invention also relates to an element for a wind turbine tower, a wind turbine tower and a wind turbine. Background technique [0002] The tower of a wind turbine generally comprises a plurality of hollow cylindrical elements welded together to form a segment of the tower with flanges at both ends. Several such segments are bolted together to form the tower. Each such cylindrical element is made of steel sheet. Each plate is cut to the required length and width. The steel plate is next rolled to form a hollow cylindrical member with a gap between the ends of the rolled steel plate. The two ends are finally welded to close the hollow cylindrical element. Several such hollow cylindrical elements are then welded to construct a segment of a tower of a wind turbine as de...
Claims
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IPC IPC(8): B23K33/00F03D11/00
CPCB23K2201/28B23K37/08B23K9/0282B23K2201/001B23K31/12F05B2230/232B23K9/0253B23K2201/06F03D11/04Y02E10/728F05B2230/10B21C37/0811B23K2101/001B23K2101/06B23K2101/28F03D13/20Y02E10/72Y02P70/50
Inventor T·哈尔肯B·佩德森N·H·斯廷斯加德
Owner SIEMENS AG