A wind turbine gearbox helix angle optimization method and system

Abstract

The invention relates to a method and system for optimizing the helix angle of a gearbox of a wind turbine. The method includes: taking the series of helix angles as a factor, and using the helix angle value corresponding to each level of helix angle as a level to establish an orthogonal test to obtain a plurality of orthogonal test schemes; inputting all the orthogonal test schemes into the gearbox for multiple The body dynamics equation obtains the overall vibration health status of each orthogonal test scheme; the vibration health status of each factor at each level is obtained according to the overall vibration health status of all orthogonal test programs; the vibration health status of each factor at each level is obtained according to the vibration health status of each factor at each level The state obtains the optimal level set corresponding to each factor; according to the optimal level set corresponding to each factor, multiple candidate solutions are obtained; each candidate solution is input into the multi-body dynamics equation of the gearbox to obtain the overall vibration health status of each candidate solution; Determine the candidate scheme corresponding to the maximum vibration health state as the final helix angle scheme. The wind turbine gear box obtained by the invention realizes the effect of vibration reduction.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a method and system for optimizing the helix angle of a gearbox of a wind turbine. Background technique [0002] The existing main gear box vibration reduction method is gear tooth modification, but gear modification relies on high manufacturing precision, which is difficult in practice, difficult to guarantee high precision requirements, and high manufacturing cost. The gear types used in wind turbine gearboxes mainly include spur gears and helical gears. Under the same force, helical gears have a stronger load-bearing capacity than spur gears and herringbone gears. When a pair of parallel-axis helical gears mesh , the tooth profile of the helical gear gradually enters and gradually disengages. The length of the contact line of the helical gear tooth profile gradually increases from zero and then gradually shortens until it disengages. The meshing process is longer...

AI Technical Summary

Problems solved by technology

Although the herringbone gear has the advantages of helical gears, it also overcomes the disadvantage that helical gears will generate a large axial force, but its manufacturing is difficult, the cost is high, and the load-carrying capacity is slightly poor. Therefore, the current mainstream three-point support wind turbine gearbox Helical gears are used

[0003] Although the gear coincidence degree is high under a large helix angle, the normal vibration load is small, and the transmission is stable, but a significant increase in the axial load will cause fatigue damage to the bearing. Therefore, a suitable helix angle has important practical significance for the vibration reduction of the gearbox, but At present, the research on the vibration reduction method of the gearbox does not adopt the method of multi-stage helix angle optimization. The helix angle usually adopts empirical values, and there is no relevant multi-stage helix angle design scheme based on the vibration reduction target.

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