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Method for calculating ultimate strength and fatigue strength of rear frame of fan

A calculation method and ultimate strength technology, applied in calculation, wind power generation, special data processing applications, etc., can solve the problems of incomplete load transmission path and inaccurate calculation strength of the frame behind the fan, and achieve simple structure, save time, cost saving effect

Inactive Publication Date: 2015-10-07
XUJI GRP +2
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, and propose a calculation method for the ultimate strength of the fan rear frame, which is used to solve the problems in the prior art about the incomplete load transmission path and inaccurate calculation of the strength of the fan rear frame

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  • Method for calculating ultimate strength and fatigue strength of rear frame of fan
  • Method for calculating ultimate strength and fatigue strength of rear frame of fan
  • Method for calculating ultimate strength and fatigue strength of rear frame of fan

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Embodiment Construction

[0031] The invention will be described in further detail below in conjunction with the accompanying drawings.

[0032] Example of calculation method for ultimate strength of fan rear frame:

[0033] 1) if Figure 1-5 As shown, the wheel hub 1, main frame 2, rear frame 3, main shaft 4, main shaft bearing 5, elastic support 6, gearbox case 7, yaw bearing 8, brake The disc 9, the brake pad 10, the yaw gearbox 11, the tower top flange 12, and the tower tube 13 establish a geometric model, use the finite element software to divide the meshes of the above parts by solid elements, and assemble them to establish a finite element model, The load transfer path of the model is complete and consistent with reality.

[0034] Among them, the wheel hub, main frame, and gearbox box are made of QT350, and the rear frame, main shaft, main shaft bearing, yaw bearing, brake disc, brake pad, yaw gearbox, tower top flange, and tower are made of steel, elastically supported Anisotropic materials ...

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Abstract

The invention relates to a method for calculating the ultimate strength and fatigue strength of a rear frame of a fan. Finite element software is utilized for carrying out grid division and assembly on geometric models of the rear frame of the fan and a device on a load transfer path respectively; a finite element model is created to realize that the load transfer path is complete and consistent with the reality; different unit load conditions are applied to the model; and the device on the load transfer path at least comprises a wheel hub, a main frame, a rear frame, a gearbox body, a main shaft bearing, a yaw bearing, a tower drum and an elastic support. As the method realizes complete load transfer path, the safety coefficient accuracy of the rear frame of the fan is improved and the operating reliability of a wind power unit is enhanced.

Description

technical field [0001] The invention relates to a calculation method for the ultimate strength and fatigue strength of a fan rear frame. It belongs to the calculation method involving the strength performance of the rear frame of the wind turbine. Background technique [0002] The rear frame of the generator is one of the important parts of the wind turbine. It has to bear various complex dynamic loads during the operation of the wind turbine, and the welded structure of the rear frame is prone to damage. Therefore, the strength performance of the rear frame It is very important for the safety of the whole generator set. [0003] In the prior art regarding the evaluation of the safety performance of the fan rear frame, some conventional engineering calculation methods are difficult to achieve the accuracy required by actual engineering. Therefore, the finite element analysis method is used to calculate the precise structural stress and obtain a reliable safety factor by es...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCY02E10/72
Inventor 齐涛董姝言苏凤宇晁冠良何海建程林志史航
Owner XUJI GRP
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