Wind driven generator gearbox optimal design method based on multi-body multi-force dynamics

Abstract

The invention discloses a wind driven generator gearbox optimal design method based on the multi-body multi-force dynamics. The method comprises the following steps: S01, establishing a wind driven generator transmission chain dynamic model, wherein parts in a gearbox adopt flexible bodies for modeling; S02, conducting dynamic analysis on the established wind driven generator transmission chain dynamic model, screening and checking the resonant frequency of the parts in the wind driven generator gearbox, and if the resonant frequency exists, executing the next step; S03, conducting optimal design on the parts, corresponding to the resonant frequency, of the gearbox, wherein the low-order modal frequency of the parts of the gearbox is adjusted through the modification of the size or structure of the corresponding parts of the gearbox; S04, circularly executing the step S01 to S03 until the resonant frequency of a transmission chain is eliminated. The wind driven generator gearbox optimal design method based on the multi-body multi-force dynamics has the advantages that the principle is simple, the operation is simple and convenient, and resonance vibration can be avoided.

Description

technical field [0001] The invention mainly relates to the technical field of wind power generation, in particular to an optimal design method of a wind power generator gearbox based on multi-body and multi-mechanics. Background technique [0002] As an important mechanical part of the doubly-fed wind turbine, the main function of the gearbox is to transmit the power generated by the wind wheel under the action of the wind to the generator and obtain a corresponding speed. At present, the gearbox design is generally completed by the gearbox manufacturer on the basis of the technical requirements and interface parameters proposed by the main engine factory. In the process of design and production, it is generally focused on whether the strength, fatigue and other performances of the parts of the gearbox meet the requirements, while the dynamic performance of the rotating parts inside the gearbox is often ignored, or even if the relevant calculations are carried out It is als...

AI Technical Summary

Problems solved by technology

Although the gear box designed and produced in this way meets the requirements of strength and fatigue, the dynamic performance of its components may not be ideal, and there may be a risk of local resonance, which will undoubtedly bury certain hidden dangers for the long-term operation of the gear box.

In addition, when the OEM develops a new model, it will generally calculate the transmission chain dynamics of the new model to verify whether there is a risk of resonance within the operating speed range. There is a risk of resonance at lower speeds. Generally, suggestions are given to avoid this speed, and optimization and improvement are rarely made from the design.

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