研究一个离心泵内的震动压力—利用数字表示的方法来支持工业实验

中文字数:3467,中文页数:4 英文字数:2013页数:5

实验
 摘要
离心泵的操作会产生不稳定性和震动压力，这可能有害于泵的完整性和其他性能。当前，正在研究一个承受于整个离心泵内部，随时间变化的压力。计算出参数的范围和三个流动速度，并且在泵的15个被覆盖不同的重要地方萃取震动。瞬变流动导致在一个小范围试验测量所获取的结果与明显的显示泵的位置经历大的震动水平相比较。这也说明，在泵涡形保护套的上死点对泵内在震动的保护要比在流动中更好。
1、介绍
   离心泵早已被发明，并且精确度超过了很多年前。在实践中，叶轮和涡螺的设计是一个整体，利用大量必要的几何学参数验证这个设计这将会产生一个水利的效率泵。众所周知，用试验就能导致操作动态泵时产生震动压力。
 不管习惯的设计过程，任何重要的新泵设计最后能相匹配的结果通常都是跟随物理实验。这些实验在时间和资金上常常都有较大的花费。例如，由于制造业的模型装置，原装泵也可以装配和利用实验设备。逐渐地，泵制造厂商把计算法转向机构特点。

ABSTRACT
 The operation of centrifugal pumps can generate instabilities and pressure pulsations that may be detrimental to the integrity and performance of the pump. In the present study a numerical investigation of the time variation of pressure within a complete pump was undertaken. A range of parameters and three flow rates were investigated and the pulsations were extracted at 15 different locations covering important pump locations experiencing the largest pulsation levels. It was also note that monitoring pulsations at the top dead centre of the pump volute casing would provide a better indication of internal pump pulsations than monitoring at the discharge.
Introduction
 Centrifugal pumps have been developed and refined over many years. In practice the design of both the impeller and volute are complex, with numerous geometrical parameters being required to identify a design that will form a hydraulically efficient pump. Even with tried designs it is well known that the operation of rotodynamic pump can result in the generation of the design process used; the final decision regarding the suitability of any significantly new pump design is usually made following physical testing. These tests are often expensive in term of time and resources, for example due to the manufacturing of pattern equipment, the prototype pump itself as well as the assembly and the use of test facilities. Gradually, pump manufacturers are turning to computational techniques to study design features.

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