提高风电齿轮箱功率密度的方法

Approaches to enhance power density of gearboxes for wind turbines

从齿轮接触疲劳强度出发,讨论了提高风电齿轮箱功率密度的几种途径。通过功率分流等形式可大大降低设计的计算载荷;通过优质材料选取、精密热处理控制、喷丸强化等齿面改性技术可有效提高齿轮的疲劳极限应力;采用齿根过渡曲线形貌优化、轮齿修形、齿面超精加工等齿廓改形技术也可明显提高齿轮的承载能力;通过减小最小安全系数或增大齿宽也可有效地减小中心距;通过行星架等零件的结构优化和行星齿轮传动的均载技术,可进一步提高齿轮箱的功率密度。

Based on pitting strength,some approaches to enhance power density of gearboxes for wind turbines are discussed.The calculation load is greatly reduced by power division.Allowable stress numbers are effectively increased by improving property of quality materials,precision heat treatment or shot peening.Load capacities can be also obviously enhanced by improving the tooth shape of morphology optimization of tooth root,tooth correction or superfinishing of tooth surface.The center distance is effectively decreased by minishing minimum allowable safety factor or enlarging face width.The power density of gearbox can be further improved by means of structure optimization of planet carrier or uniform load of planetary gear transmission.