风电回转支承滚道切入磨削的砂轮修形

Grinding Wheel Truing for the Slewing Ring's Ball Track Grinding in Relation to Wind Energy Turbines

应用多体运动学原理,建立了回转支承滚道成形磨削的砂轮修形几何误差模型;由机床非线性几何误差引起的砂轮修形误差会导致磨削的回转支承滚道开口变大和接触角变小;砂轮修正器金刚笔笔尖的正负偏离也会引起修形砂轮的轮廓变形。通过编程坐标误差反向补偿方法以及金刚笔笔尖正负偏离的校正方法,可有效调整磨削的回转支承滚道开口量和接触角。该方法是减小回转支承滚道磨削误差、提高滚道轮廓精度的关键技术之一。

Multi--body system theory was employed to establish the geometric error model of grinding wheel truing, which was for forming the slewing ring＇s ball track. The grinding wheel truing error caused by the grinding machine geometric error can lead to the change of the angle contacting and the opening size of the slewing ring＇s ball track. The shape of grinding wheel truing was also in- fluenced by the biased error of grinding wheel truer. The methods of inverse error compensation and the adjusting of the biased error of grinding wheel truer can effectively adjust the angle contacting and the opening size of the slewing ring＇s ball track. Both of the methods are critical to decrease the error of the slewing ring＇s ball track of grinding formation.