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Method for calculating front frame strength of wind generating set

A technology for wind turbines and calculation methods, which is applied in the fields of calculation, electrical digital data processing, special data processing applications, etc., can solve the influence of bearing stiffness without consideration, the force deviation of the front frame under force state, and only consider the impact of the bearing stiffness. influence, etc.

Inactive Publication Date: 2015-07-08
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

For example, only the influence of wind and aerodynamic load on the front frame is considered, and the influence of bearing stiffness is not considered
In addition, the transmission process of the yaw moment is simplified. Generally, only the yaw brake, the yaw block and the front frame are bound by the yaw force transmission components, so that the joint between the front frame and the yaw brake is subjected to The force is too large, and the force state of the front frame deviates from the actual force

Method used

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  • Method for calculating front frame strength of wind generating set
  • Method for calculating front frame strength of wind generating set

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Embodiment Construction

[0020] Attached below figure 1 with 2 The present invention will be further described.

[0021] In the process of establishing the geometric model, it is necessary to simplify the features that have little influence on the strength, such as small chamfers, bosses, etc. The specific implementation steps of the present invention are as follows:

[0022] First, use 3D software to establish the geometric model of the front frame 4 and the geometric model of the parts that affect the force of the front frame, including the wind wheel locking disc 1, the main bearing seat 2, the main shaft 3, the front frame 4, and the gearbox support 5. Tower tube 6, rear frame 7, yaw pad 8, yaw brake 9, yaw bearing inner ring 10, yaw bearing outer ring 11, yaw brake disc 12, upper yaw friction plate and The lower yaw friction plate 13 is assembled and converted into a format recognized by the grid software, and imported into the grid software to divide all parts into grids to form a grid model f...

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Abstract

The invention provides a method for calculating front frame strength of a wind generating set. The method comprises the following steps: implementing modeling with the existing finite element software as the platform, defining material attributes of various components, and performing calculation to obtain a stress cloud chart and a largest stress point of the front frame. The invention overcomes the disadvantages of the prior art in the calculation of front frame strength of the wind generating set, perfects considerations in detailed aspects, perfects a finite element model of front frame strength calculation mainly in the aspects of load boundary, correct transfer of yawing moment as well as simulation of main shaft bearing and yawing bearing and the like, thus obtaining more accurate front frame stress distribution, and providing a more accurate front frame strength result in terms of design, and providing scientific basis for the design of the front frame.

Description

technical field [0001] The invention belongs to the technical field of wind power generation, and in particular relates to a method for calculating the strength of a front frame of a wind power generating set, in particular to a method for calculating the strength of a front frame of a horizontal axis wind generating set whose yaw system is a rolling type. . Background technique [0002] The wind turbine is subjected to very complex alternating wind loads in the field for a long time, and the front frame is one of the most critical and complex components in the wind turbine, which supports the wind wheel assembly, the transmission system, and the middle support The yaw reducer is installed so that the output pinion gear is correctly meshed with the yaw external gear fixed on the top of the tower, and the bottom of the front frame is connected with the yaw bearing through bolts. Therefore, its good design and reliable quality can ensure the long-term, stable, reliable and sa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 吕杏梅赵萍钟杰
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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