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Method of guaranteeing fan high-strength bolt pretightening force to be accurately exerted

A high-strength bolt, pre-tightening technology, applied in threaded fasteners, screws, mechanical equipment, etc., to ensure the effect of lubrication and stability

Inactive Publication Date: 2013-12-04
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0016] The purpose of the present invention is to propose a new accurate application method for the high-strength bolt pre-tightening force of the wind-driven generating set, which can effectively solve the problems existing Existing problems in the accurate application of high-strength bolt preload for wind turbines

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  • Method of guaranteeing fan high-strength bolt pretightening force to be accurately exerted
  • Method of guaranteeing fan high-strength bolt pretightening force to be accurately exerted
  • Method of guaranteeing fan high-strength bolt pretightening force to be accurately exerted

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Embodiment Construction

[0049] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0050] attached figure 1 A schematic block diagram of torque determination of the present invention is given, and it can be seen from the accompanying drawings that the present invention relates to a method for accurately applying the pretightening force of high-strength bolts of a wind power generating set. The accuracy grade, the surface roughness of the mating surface, the surface treatment method, the bolt model specification and the temperature influence factors on the torque coefficient. The grade, the roughness of the matching surface, the surface treatment method, the bolt type specification and the temperature control control the dispersion coefficient (maximum value of torque coefficient / minimum value of torque coefficient) of each batch of bolts of each specification when using the torque method. Within 1.25.

[0051] Further, the relations...

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Abstract

The invention discloses a method of guaranteeing a wind generating set high-strength bolt pretightening force to be accurately exerted, which is characterized in that according to influence factors on a torque coefficient, such as lubricant which is used when a high-strength bolt is screwed down, a smearing mode, a thread precision grade, the surface roughness of a matched surface, a surface processing mode, a bolt model specification and temperature, the torque coefficient is confirmed on the basis of the theory of a torque method, and the range of dispersion coefficient of each specification of bolt in each batch when the torque method is adopted is controlled within 1.25 through controlling the lubricant, the smearing mode, the thread precision grade, the roughness of the matched surface, the surface processing mode, the bolt model specification and the temperature.

Description

technical field [0001] The invention relates to an installation method of a wind turbine generator set, in particular to an installation method of high-strength bolts of a wind turbine generator set, which can ensure accurate application of pretightening force during the installation process and is mainly suitable for the installation of high-strength bolts of the wind turbine generator set. Background technique [0002] There are many high-strength bolts on the fan. These high-strength bolts play an important role in the connection. The pre-tightening force of these high-strength bolts must be within the scope of the design requirements and be as uniform as possible. Otherwise, during the operation of the fan, due to the external force. Leading to bolt loosening and fracture or yield fracture, and even the collapse of the fan, the consequences are very serious. Therefore, it is necessary to ensure that the pre-tightening force of the high-strength bolts is accurately applied...

Claims

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Application Information

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IPC IPC(8): F16B35/00G06F17/50
Inventor 李秀珍李晓光李润旭梁宪峰凡增辉欧阳华朱为亮肖进吕杏梅刘彦
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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