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Strength calculation method of hub and spindle connecting bolt of wind generator set

A technology of a wind turbine and a calculation method, which is applied in the directions of calculation, electrical digital data processing, special data processing applications, etc., can solve the problems of low calculation accuracy, and achieve the effect of saving time and cost.

Inactive Publication Date: 2015-06-10
北京博比风电科技有限公司
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  • Application Information

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Problems solved by technology

In order to meet the strength requirements, the empirical formula provided by the standard is generally used for analysis and calculation, and there are many simplified conditions in it to make the calculation accuracy very low

Method used

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  • Strength calculation method of hub and spindle connecting bolt of wind generator set
  • Strength calculation method of hub and spindle connecting bolt of wind generator set

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Embodiment Construction

[0016] Such as figure 1 As shown, the method for calculating the connecting bolts between the hub of the wind power generating set and the main shaft according to the present invention, its steps mainly include:

[0017] (1) Using the existing finite element software as a platform to implement modeling, first consider the main shaft 2, hub 1 and bolt 3, and establish a finite element model;

[0018] (2) Secondly, the wheel hub 1 and the main shaft 2, and the bolt 3 and the main shaft 2 establish a surface-to-surface contact relationship to realize force transmission.

[0019] (3) The hub 1 adopts the solid element SOLID187; the main shaft 2 adopts the solid element SOLID185 without intermediate nodes, the bolt 3 is simulated by the beam element, and the bolt head is simulated by the SHELL element. The bolt 3 and the hub 1 adopt a common node to realize threaded connection. A node is established at the center of the hub, and the node is connected with the hub through the MPC ...

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Abstract

Disclosed is a strength calculation method of a hub and spindle connecting bolt of a wind generator set. The strength calculation method includes modeling based on existing finite element software as platform, defining material attributes of various parts at last, and calculating to obtain a deformation and stress nephogram. The modeling process mainly includes modeling in the finite element software, simulating a hub and a spindle by a solid unit, and simulating a bolt by a beam unit; fully constraining the spindle. The strength calculation method has the advantages that strength performance of the hub and spindle connecting bolt can be beneficially and precisely calculated, various working conditions can be calculated, saving time and cost is facilitated and the strength calculation method can be applicable to wide-range popularization.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a calculation method for connecting bolts between a hub of a wind power generating set and a main shaft. Background technique [0002] The connection between the main shaft and the hub is realized by bolts. The bolts cannot bear the effect of pre-tightening force, but also bear the load from the center of the hub. This puts forward high requirements for the connecting bolts between the hub and the main shaft. In order to meet the strength requirements, the empirical formula provided by the standard is 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 connecting bolts between the main shaft and the hub, the method of increasing the safety factor is often adopted. Because it is particularly important to carry out accurate optimal...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 章建锋
Owner 北京博比风电科技有限公司