Calculation method for checking ultimate strength of fan underframe

A calculation method and technology of ultimate strength, applied in calculation, special data processing applications, instruments, etc., can solve problems such as the strength and safety of fan chassis, and achieve the effect of simple and easy calculation process, accurate force relationship, and wide applicability

Inactive Publication Date: 2013-09-25
CHINA CREATIVE WIND ENERGY +3
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Problems solved by technology

It is calculated by finite element analysis software to so

Method used

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  • Calculation method for checking ultimate strength of fan underframe
  • Calculation method for checking ultimate strength of fan underframe

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Embodiment

[0018] Embodiment: The calculation method of the present invention adopts ANSYS (finite element analysis software) as an implementation tool. This example is specifically described with the method of checking the ultimate strength of a fan chassis, as figure 1 As shown, its calculation method includes the following steps:

[0019] The first step: Establish the geometric model of the main shaft, chassis and main bearing: In the 3D software, establish the 3D model of the chassis and main bearing; use the beam element to establish the main shaft part.

[0020] Step 2: Carry out finite element mesh division for the chassis and main bearing models: see Table 1 for details of the unit settings of each connecting part; use tetrahedron or hexahedron elements for mesh division, and at the same time, the unit size is 50-100mm; for Line elements are divided into three-dimensional beam elements, whose radius is the radius of the main axis. At the same time, each main axis is divided into ...

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Abstract

A calculation method for checking ultimate strength of a fan underframe includes: using finite element analysis software as a platform for modeling, performing finite element meshing, setting connecting structure load and boundary conditions, and calculating to obtain stress condition of the underframe. The step of setting the connecting structure load and boundary conditions includes: establishing nodes at the center of a hub and at the center of a bearing, connecting the nodes through a three-dimensional beam unit, and simulating spindle transfer load. A central point of a main bearing block is connected with an inner ring surface unit of the main bearing through a link unit which bears only pressure. The method has the advantages that calculated stress of the underframe and calculated danger positions are more accurate and the actual stress relation of the underframe is satisfied.

Description

technical field [0001] The invention belongs to the technical field of wind power generation, and in particular relates to a calculation method for checking the ultimate strength of an underframe, which is a more general method for checking the underframe of a fan, and can be widely used for checking the ultimate strength of a fan underframe of various structures. nuclear. Background technique [0002] At present, the chassis of megawatt wind turbines mainly adopts finite element calculations. Only at the boundary between the main shaft and the main bearing can there be an integrated or binding processing method. This boundary condition makes the simulation of the entire force transmission relationship of the wind turbine consistent with that of the actual wind turbine. There is a certain deviation in the force transmission relationship. It does not reflect the nonlinear relationship that the bearing only bears pressure and does not bear tension in the force transmission re...

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Application Information

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IPC IPC(8): G06F17/50
Inventor 李博超刘衍选蔡晓峰赵炳胜
Owner CHINA CREATIVE WIND ENERGY
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