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Method for handling a wind turbine blade

A technology of blades and pulleys, which is applied in the field of installation and removal of wind turbine blades, and can solve problems such as complicated operation and fragility

Inactive Publication Date: 2019-04-16
SOLETANCHE FREYSSINET SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, even if this is usually done in favorable weather conditions, the blades are still susceptible to wind or other effects as they continue along the cable
In the event of an unexpected wind, safety requires the nacelle to be reorientated before acting on the second or third blade, but the cable system complicates this
Also, this solution makes it impossible for the blades to dock on the hub, which is still a delicate and fragile process

Method used

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  • Method for handling a wind turbine blade
  • Method for handling a wind turbine blade
  • Method for handling a wind turbine blade

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Embodiment Construction

[0031] figure 1 with figure 2 The illustration shows a wind turbine with a tower 10 with a nacelle 15 on top. To facilitate the reading of these two figures, the horizontal dimension of the wind turbine tower has been enlarged relative to its vertical dimension. In fact, the vertical dimension of the tower, for example about 150 m, is 10 times larger than its horizontal dimension.

[0032] The tower 10 stands on a foundation 11 built in the ground. Generally, the tower 10 is made by assembling precast concrete elements over its entire height or part of its height. The concrete members are prestressed by vertical cables (not shown) to ensure that the tower 10 has good bending resistance to the bending force exerted on it by the wind.

[0033] The top of the tower 10 is assembled to accommodate a nacelle 15 having a base pivoting about the vertical axis Z of the tower. The purpose of the nacelle 15 is to house the generator 20 of the wind turbine, the rotor of which has a hub 21 ...

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Abstract

In order to handle a wind turbine blade between the ground and a rotor of an electric generator mounted on a nacelle (15) at the top of a tower (10), the blade (25) is retained in a support (40) thatis mounted on a trolley (30) arranged against the tower. The trolley is moved and guided along the tower using at least one cable (32, 33) which is angled in such a way as to apply a force having a horizontal component in the direction of the tower to the trolley.

Description

Technical field [0001] The invention relates to the installation and removal of wind turbine blades. Background technique [0002] To install or unload wind turbine blades, the most commonly used heavy-duty cranes are used, which are cranes capable of lifting heavy loads to the height of the tower, for example, cranes used to assemble nacelles. The use of such cranes to assemble wind turbines is quite problematic because it is quite expensive to rent such cranes and the weather conditions that enable them to manipulate the blades are not guaranteed. [0003] Although wind turbine blades are bulky and large wind turbines can be longer than 50 meters in length, they are not too heavy, for example, from 10 to 15 tons. Therefore, there is no need to use a large crane, although it is currently the most commonly used device. [0004] Alternatively, U.S. Patent No. 7,785,073 proposes to install or remove wind turbine blades using at least one cable that extends between the ground and a pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D13/10
CPCY02E10/72F05B2230/60F03D13/10Y02P70/50F05B2230/61
Inventor 伯诺伊特·梅伦尼库拉斯·法布里埃里克·劳伦特
Owner SOLETANCHE FREYSSINET SAS
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