为了开发能适应恶劣工况、高效节能和安全运行的螺杆真空泵，设计了一种自平衡的内部压缩螺杆转子模型。使用借助Hermite插值理论导出圆柱变螺距螺旋线的参数方程，构建了变螺距设计参数、尾部压缩级数与螺旋角度的变量关系式，建立了自平衡螺杆转子优化设计模型。通过计算，优化转子质量轴向分布，无需在螺杆转子两端和齿顶减重而达到良好的自身动平衡，动平衡试验证明了设计模型的可靠性，为螺杆真空泵的动平衡研究提供了参考依据。
Abstract
In order to develop screw vacuum pump that works efficiently, runs safely, and can adapt to bad working conditions, a screw rotor with automatic dynamic balancing, which changes in volume, is built. The cylinder of variable pitch Helix parameter equation is calculated using Hermit’s interpolation theory. The variable relationship of variable pitch design parameters, tail compression stages and spiral angle are established. Through calculation, axial distribution of the optimized rotor mass is exhibited and dynamic balance is achieved well by itself without the weight subtraction at both ends and tooth tip of the rotor. The reliability of the design model is proven in the dynamic balance test and a good reference is provided for study on dynamic balance of screw vacuum pumps.
关键词
螺杆真空泵 /
静平衡 /
动平衡 /
螺杆转子 /
变螺距
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Key words
screw vacuum pump /
static balance /
dynamic balance /
screw rotor /
variable pitch
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