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A Calculation Method for Checking the Lock Strength of Fan Wind Wheel

A calculation method and strength checking technology, which can be applied in the fields of calculation, instrumentation, electrical and digital data processing, etc., can solve the problem of insufficient accuracy of wind wheel lock strength checking, and achieve the effect of improving accuracy.

Inactive Publication Date: 2018-12-07
XUJI GRP +2
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention overcomes the deficiencies of the prior art, and proposes a calculation method for checking the strength of the wind wheel lock, which is used to solve the problem that the strength check of the wind wheel lock is not accurate enough in the prior art

Method used

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  • A Calculation Method for Checking the Lock Strength of Fan Wind Wheel
  • A Calculation Method for Checking the Lock Strength of Fan Wind Wheel

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Experimental program
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Embodiment Construction

[0018] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0019] 1) Use 3D drawing software (such as CAD) to establish a 3D geometric model of the locking disc, locking sleeve, locking shaft and main shaft prosthesis, and assemble each part of the model. The matching tolerance is IT01 to ensure that each contact body is theoretically just touch. Wherein, the lock sleeve and the lock shaft adopt the method of interference assembly.

[0020] 2) Import the assembled model into the finite element software to establish a finite element model of the wind wheel lock, and perform finite element mesh division on the model (see Table 1 for details). The unit size of the disc and spindle prosthesis is set to 30-60mm, and the thickness direction of the lock sleeve is set to 3 layers.

[0021] Table 1 The finite element unit settings of each component

[0022] model part

unit type

unit type

key option

Shaft...

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Abstract

The invention relates to a strength checking calculation method for a fan wind wheel lock. Three-dimensional geometrical models of prostheses of a fan locking disc 3, a lock shaft 1, a lock sleeve 2 and a main shaft 4 are built, and are assembled, wherein the lock shaft and the lock sleeve are assembled in an interference way. Finite element analysis software is imported into the models to build a wind wheel lock finite element model; the boundary conditions and the contact of each component of the model are set; limit load work conditions are exerted on the model; the stress condition of a wind wheel lock is obtained through solution; the stress size and the dangerous position of the wind wheel lock are further obtained; and the calculation result is compared with a wind wheel lock allowable value to check the strength of the fan wind wheel lock. The calculation method has the advantages that the model of the locking disc is added, and the interference assembly of the lock shaft and the lock sleeve is considered, so that the accuracy of checking the strength of the fan wind wheel lock is improved; and the result well conforms to the actual operation condition of a wind turbine generator.

Description

technical field [0001] The invention relates to a calculation method for checking the lock strength of a blower fan. The invention belongs to the field of strength checking of wind power generating set parts. Background technique [0002] Wind turbine rotor lock is an important part of wind turbines. At present, the verification method of fan rotor lock strength mainly adopts finite element analysis method. However, the finite element model of the existing wind wheel lock does not consider the establishment of a shrink disc model, and the assembly of the lock shaft and the lock sleeve is not thoughtful enough. There is a certain deviation in the force relationship, which amplifies the effect of the wind rotor torque, and the obtained wind wheel lock is too strong, which cannot accurately reflect the working situation of the wind wheel lock. Contents of the invention [0003] The invention aims to overcome the deficiencies of the prior art, and proposes a calculation meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 晁贯良苏凤宇程林志董姝言齐涛曹胜平耿丽红刘晓辉
Owner XUJI GRP
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