The concrete volute pump with a specific speed of 460 has been designed. The performance characteristics and radial thrust has been investigated for three types of volute casings by using CFD. The first one is a conventional volute casing, the second one is the volute with diffuser and the third one is a double volute, respectively. Here the volutes have been designed by the constant velocity method. The effects of the diffuser and the double volute on the radial thrust have been compared by using the transient calculation. The analysis results show that radial force of the volute with a diffuser decreases at off-design conditions compared to the other volutes. main effect of radial thrust in the pump which is well designed seal, bearing and shaft. The hydraulic characteristics of volute for the centrifugal pump have been studied by many researchers. Canavelis et al.[l] studied on the hydraulic performance variation with different volute geometry by test and Baun, et. al.[2] analyzed radial thrust variation in the single and double volute experimentally. Also, Spence, et. al[3] reported the numerical results for the pressure pulsation in the double volute pump. In this study, to design concrete volute pump with specific speed of 460 the hydraulic performance and radial force acting on impeller studied numerically for the three different types of volute.
展开▼
机译：设计了特定速度460的混凝土蜗壳。使用CFD研究了三种类型的蜗壳壳体的性能特征和径向推力。第一个是传统的蜗壳壳体，第二个是具有扩散器的蜗壳，并且第三个是双蜗壳。这里，蜗壳由恒定速度法设计。通过使用瞬态计算比较了扩散器和双蜗壳对径向推力的影响。分析结果表明，与其他蜗壳相比，延伸器的速度的径向力降低。径向推力在泵中的主要影响，设计精美密封，轴承和轴。许多研究人员研究了离心泵的蜗壳的液压特性。 Canaptis等人。[l]通过测试和Baun等利用不同蜗壳几何的液压性能变化研究。 al。[2]通过实验分析了单级和双蜗壳的径向推力变化。此外，Spence等。 al [3]报道了双蜗壳泵中的压力脉动的数值结果。在这项研究中，设计具有460的特定速度的混凝土蜗壳泵，其液压性能和作用在叶轮上的辐射力用于三种不同类型的蜗壳。
展开▼
