副叶轮直径的解析求解

摘  要：各类渣浆泵广泛使用的副叶轮除防止液相中的固态杂质扩散外，还有两项重要功能：降低密封处流体压力；平衡水体作用于叶轮的轴向力以减轻轴承轴向负荷。副叶轮这两项涉及到渣浆泵可靠性与寿命的功能都依赖于副叶轮正确几何尺寸的确定。针对副叶轮两项预期功能，导出了副叶轮几何尺寸计算的两种程序。以旋转流体中压力分布规律和数学分析为基础，给出了两种目标的副叶轮的几何尺寸的计算方法和过程，导出了便于应用的结论与公式。这一成果为设计人员定量确定副叶轮提供了理论可靠的新依据，保证副叶轮在运行中更准确地实现预期的功能要求，有利于提高各类渣浆泵的可靠性和使用寿命。
关键词：渣浆泵; 副叶轮; 设计; 数学分析;几何尺寸
中图分类号：TH311文献标志码：A文章编号:

Analytical Solution to Expeller Diameters

Yan Jing，Kan Nengqi , Zeng Chaoqiang , Wan Tao
(School of Energy and Environment Xihua University ,Chengdu, Sichuan, 610039,China)

Abstract: In addition to preventing debris in liquids pumped from spreading, expellers which are extensively used in all kinds of slurry pumps perform two other functions, that is, reducing liquid pressure at seals and balancing axial thrust acting on impellers so as to reduce axial loads for bearings. Both functions are closely pertinent to reliability and life span of pumps and are exclusively determined by geometry of expellers. Authors of this paper formulated two programmers to find expeller dimensions for their expected aims. Based on pressure distribution within a rotating water body and mathematical analysis, authors offered calculating principles and processes to determine geometrical parameters for two kinds of expellers, and derived some  equations for design practice. Results presented in the paper will be beneficial to improve slurry pump reliability and performance..
Key words: slurry pump; expeller; design; mathematical analysis; geometric dimension