中文摘要：

为分析固液混合物对双流道输送泵性能的影响,采用平均粒径为10mm和36mm的固体颗粒对双流道泵在不同浓度和流量下开展输送固液两相介质的水力性能试验,并对泵的磨损进行分析。水力试验结果表明,在一定的流量下,随着输送混合物中固体颗粒浓度的增加,入口表压、出口表压、扬程及效率呈递减趋势。与输送清水时比较,当输送固液两相介质时,随着流量的增大,轴功率上升较快,扬程的下降量在不同流量下几乎相同;效率曲线在不同流量下比输送清水时效率要低,差值随着流量的增大而增大。在同流量同浓度比工况下,泵的进出口压力、扬程和汽蚀性能在输送较大直径固体颗粒时,明显下降。通过对双流道泵磨损的分析表明,叶轮磨损部位主要在前盖板外缘、流道内偏前盖板的流道表面、压力面进口边,压力面的磨损区域呈三角形;泵体的磨损部位主要在周壁、隔舌及泵体口环处。本研究可为固液两相双流道离心泵的理论研究与设计应用提供试验依据。

英文摘要：

To analyze the effect of solid-liquid mixture on the performance of double-channel delivery pump, hydraulic performance test of double-channel pump delivering solid-liquid media with different concentration and flow rate is carried out and the wear of pump is analyzed. The average diameters of solid used in the test are 10 and 36 mm. The hydraulic test results show that at a certain flow rate the inlet pressure, outlet pressure, head and efficiency of pump decrease with the increase of concentration of solid in the delivered mixture. Compared with delivering clear water, when solid-liquid medium is delivered the shaft power rises quickly, while the head drop is almost the same at different flow rate. The efficiency at different flow rate is lower than that in delivering clear water, and the difference of efficiency increases with the increase of flow rate. At same flow rate and concentration ratio, the inlet and outlet pressure, head and cavitation performance of pump decrease obviously in delivering relatively big diameter solid. The analysis on the wear of double-channel pump shows that the worn positions of impeller are outer edge of front shroud, channel surface on the front shroud side, inlet edge of pressure surface. The wear zone of pressure face shows a triangle. The worn sections of pump casing are volute periphery, volute tongue and casing ring. This research provides test basis for the theoretical research, design and application of solid-liquid double-channel centrifugal pump.