Tower frame door opening of wind generating set and design method of tower frame door opening

A technology of wind turbine tower and design method, which is applied to wind turbine components, wind turbines, wind power generation and other directions, can solve the problems of narrowing stress concentration area and large stress concentration coefficient in simulation calculation

Active Publication Date: 2012-05-02
BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP
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Problems solved by technology

[0007] Since the opening of the ellipse is more retracted than the multi-segment arc, the opening area is slightly reduced, so the stress concentration area in the simulation calculation is narrow

Method used

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  • Tower frame door opening of wind generating set and design method of tower frame door opening
  • Tower frame door opening of wind generating set and design method of tower frame door opening
  • Tower frame door opening of wind generating set and design method of tower frame door opening

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Embodiment Construction

[0050] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0051] Figure 5 A method for calculating the stress concentration factor of a tower door opening according to an embodiment of the present aspect is shown. Figure 6 The basic form and opening position of the tower doorway according to the embodiment of the present invention are shown. Figure 7 is a cross-section and general arrangement showing a tower door frame according to an embodiment of the invention.

[0052] Before the formal description, explain a few concepts, the nominal stress is the stress that does not consider the stress concentration caused by the geometric structure of the component (mainly ignoring the local stress concentration caused by the component opening or structural mutation), but according to the force and section characteristics of the component , the stress obtained by the relevant theory of material mechanics, where the actual...

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Abstract

The invention discloses a tower frame door opening of a wind generating set and a design method of the tower frame door opening; the tower frame door opening consists of two straight line segments and a curve segment according to shape, and the curve segment consists of more than three circular arcs with different diameters. The thickness of a door frame of the tower frame door opening is 1.15 to 1.17 times of the thickness of a tower tube wall preferentially, the length of the door frame along the radial direction of a tower tube is 4.5 to 5.5 times of the thickness of the door frame preferentially, and the length of the door frame at the central height position of the door opening, which extends out of the tower tube wall, is about half of the length of the door frame along the radial direction of the tower tube. The actual design process of the tower frame door opening comprises an overall data design of a door frame section, a door frame section modeling, a stress concentration factor IIW (International Institute of Welding) interpolation calculation and the like. Firstly, obtain an optimized parameter of the shape of the curve segment at the door opening, secondly, based on the optimized parameter, perform a further optimization to a size parameter of the door frame. The tower frame door opening increases the mechanical property index and reduces the impact of the existing door opening on a tower tube structure.

Description

technical field [0001] The invention relates to a door opening of a tower frame of a wind power generating set and a design method thereof, in particular to a structure of a door opening of a tower frame of a wind power generator, and an optimization design method for parameters such as the opening shape and size of the door opening. Background technique [0002] Large wind turbine towers usually consist of one or more tower sections, while the base section is typically designed with door openings, door side stiffeners and door structures into the tower interior. The shape of the door opening and the door frame is usually composed of two semi-ellipses or multiple arcs and two straight segments, and the height and width of the door frame are usually designed according to engineering experience. Since the opening weakens the structural performance of the tower to a certain extent, there are currently many designs to strengthen this part (such as patent documents CN201588746U, ...

Claims

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Application Information

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IPC IPC(8): F03D11/04
CPCY02E10/728
Inventor 杨振兴刘朝丰张紫平
Owner BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP
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