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针对干式涡旋真空泵的振动平衡问题,对其工作原理、机械动力学模型、渐开线型线的理论偏心等方面进行了分析。提出相应动平衡设计方法并对核心部件进行三维建模:其中包括动涡旋盘的质心调整,扇叶上下两个扇区厚度差异设计。通过Fluent对涡旋盘进行空气动力学的仿真,设计专用夹具及配重块并进行实验验证,以确定整套的平衡工艺方法。研究结果表明:整机动平衡精度可达0.2 g以下,振动数值由10降到1 mm/s左右,平均用时15 min,减振效果显著,生产效率得到极大提高。
Aiming at the vibration balance problem of dry vortex vacuum pump, the working principle, mechanical dynamic model and theoretical eccentricity of involute profile are analyzed. The corresponding dynamic balance design method and three-dimensional modeling of the core components are proposed: including the centroid adjustment of the orbiting scroll and the thickness difference design of the two sectors above and below the blade. Fluent scrolls through the aerodynamic simulation of the design of special fixture and counterweight and experimental verification to determine the package of balanced technology. The results show that the dynamic balance precision of the whole machine can reach below 0.2 g, the vibration value is reduced from 10 to 1 mm / s, and the average time is 15 min, the vibration damping effect is remarkable and the production efficiency is greatly improved.