Calculation method for static shaft strength of direct-drive wind generator set

A wind power generation unit, strength calculation technology, applied in the direction of applying stable tension/pressure to test material strength, etc., can solve the problems of heavy static shaft, increased manufacturing cost of static shaft, and increased structural size, so as to save time and save energy. cost effect

Inactive Publication Date: 2016-11-23
北京博比风电科技有限公司
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Problems solved by technology

In order to meet the strength requirements, the formulas provided by material mechanics, theoretical mechanics and elastic mechanics are generally used for analysis and calculation, but there are many simplified conditions that make the calculation accuracy very low
In order to ensure the safe and reliable operation of the static shaft, the method of increasing the safety factor is often used, but the result is an increase in the structure size, waste of materials, and sometimes a reduction in structural performance
Some static shafts are designed to be very heavy and huge, and the heavy static shaft increases the manufacturing cost

Method used

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  • Calculation method for static shaft strength of direct-drive wind generator set
  • Calculation method for static shaft strength of direct-drive wind generator set

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Embodiment Construction

[0017] like figure 1 As shown, the method for calculating the static axis strength of a wind power generating set according to the present invention, its steps mainly include:

[0018] (1) Using the existing finite element software as a platform to implement modeling, the moving shaft 3, the front bearing 5, the rear bearing 6, the connecting flange 2 between the generator stator and the static shaft, and the flange connecting the base and the static shaft 1 to take into account;

[0019] (3) The static shaft 4, the connecting flange 2 between the generator stator and the static shaft, and the flange 1 connecting the base and the static shaft are considered as a whole, and a solid unit is adopted;

[0020] (4) Finally, define the material properties of each component, perform calculations, and obtain deformation and stress cloud diagrams.

[0021] Loading on the model: the load (except the torque) at the center of the hub is directly added to the moving shaft 3, the torque i...

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Abstract

The invention provides a calculation method for static shaft strength of a direct-drive wind generator set. Modeling is performed by taking existing finite element software as a platform, the material property of each component is defined for calculation, and deformation and stress nephogram is obtained, wherein in the modeling process, a moving shaft, a front bearing, a rear bearing, a generator stator and static shaft connecting flange and a base and static shaft connecting flange are mainly considered. The calculation method has the beneficial effects that the strength property of the static shaft is calculated precisely, a plurality of working conditions can be calculated simultaneously, time is saved, the cost is saved, and the method is very suitable for large-scale promotion.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a method for calculating the static axis strength of a direct-drive wind power generating set. Background technique [0002] The static shaft is a key component of the wind turbine, which is responsible for resisting the load from the center of the impeller, transmitting the load to the base, and transmitting the torque to the generator stator, which puts forward high requirements on the strength of the static shaft. In order to meet the strength requirements, the formulas provided by material mechanics, theoretical mechanics and elastic mechanics are generally used for analysis and calculation, but there are many simplified conditions which make the calculation accuracy very low. In order to ensure the safe and reliable operation of the static shaft, the method of increasing the safety factor is often used, but the result is an increase in the structure size, waste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08
Inventor 章建锋
Owner 北京博比风电科技有限公司
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