反转轴流式泵的性能测试和流程测量

反转轴流式泵的性能测试和流程测量(中文5400字,英文3500字)
摘要
反转动子的应用提议针对对轴流式泵更高的速度的开发的具体需求。在本论文比较了动子与定子的常规类型，描述了使用反转动子的好处和缺点，根据理论和实验性调查。好处是如下：(1)泵浦被设计更小，产生了更低的旋转的速度。(2)流速的稳定的典型曲线与负倾斜出现。(3)当后方动子旋转的速度变化作为前面电动子独立控制，除前面电动子速度控制之外，大范围高性能操作由后方电动子速度控制得到。缺点是如下：(1)双重轴系统结构变得复杂。(2)泵浦的表现是流速的降低，为后方动子传输能力被减弱。(3)从朝向动子的后方动子的刀片行互作用强烈出现。然后后方电动子设计是完成更高的泵浦表现的钥匙。克服这些缺点的有些方法将较详细的被谈论往反转轴流式泵更广阔的用法以适用于各种各样的工业领域。
主题词： 轴流式泵， 反转电动子，多相流，旋转的速度控制，刀片荡桨互作用

Performance Test and Flow Measurement of Contra-Rotating Axial Flow Pump

An application of contra-rotating rotors has been proposed against a demand for developing higher specific speed axial flow pump. In the present paper, the advantage and disadvantage of using contra-rotating rotors are described in comparison with conventional type of rotor-stator, based on theoretical and experimental investigations. The advantages are as follows: (1) The pump is inherently designed as smaller sized and at lower rotational speed. (2) A stable head-characteristic curve for flow rate with negative slope appears. (3) As the rear rotor rotational speed is varied as independent control of front rotor, the wider range of high performance operation is obtained by rear rotor speed control in addition to front rotor speed control. The disadvantages are as follows: (1) The structure of double shaft system becomes complex. (2) The pump performance is inferior at over flow rate as the rear rotor loading is weakened. (3) The blade rows interac-tion from rear rotor to front rotor more strongly appears. Then the rear rotor design is a key to achieve higher pump performance. Some methods to overcome these disadvantages will be discussed in more details toward wider usage of contra-rotating axial flow pump in various industrial fields.
Keywords: axial flow pump, contra-rotating rotors, multiphase flow, rotational speed control, blade rows inter-action