Reshaping Impact of Sun Gear on Its Structural Performance
The self-designed wind power incremental gearbox was taken as the research object in this paper,and a three-dimensional model was established.The performance of each gear before trimming was simulated and analyzed with Romax simulation software.In accordance with the design specifications of the gearbox,including the anticipated lifespan of each gear,cumulative damage,maximum contact stress,safety coefficient,meshing load distribution coefficient,and other pertinent criteria,the objective of the reshaping process is defined and the requisite extent and methodology are determined.Subsequently,a comparison and analysis of the performance of the gears before and after reshaping is conducted.The results demonstrate a statistically significant reduction in the contact load per unit length of the sun gear following the reshaping process.The maximum contact load was found to have decreased from 1,685 N/mm prior to shaping to 932 N/mm after shaping,representing a reduction of approximately 44%.Moreover,the concentration of stress and the phenomenon of bias load have also been significantly reduced,with the maximum contact stress of the sun gear decreasing from 1,321 MPa to 872 MPa(a reduction of 34%);the maximum bending stress has decreased from 488 MPa to 376 MPa(a reduction of 23%);the contact safety coefficient has increased by 46.4%,while the transmission error variation has decreased by 7.2 times,and the gear life has increased by 6.3 times.It can therefore be concluded that the reshaping of gears has the potential to reduce wear,minimize stress concentration and enhance the overall performance of the gears.
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