基于伯努利效应的疏浚离析器设计与试验

Design and Test of the Dredging Eductor Based on Bernoulli Effect

以小河道清淤为主要目的,应用SolidWorks软件平台设计了疏浚离析器,采用流体机械试验方法验证了离析器的功效。室内试验研究了三种不同孔径的喷嘴在离析器1/4小开度阀位工况下的管道出口含沙量与密度,现场清淤试验在河道中检验了疏浚器的泥浆输送特性与机械特性,研究分析了235 m长距离或45 m短距离泥浆输送情况下的扬程高度与排淤量的运行参数,发现理想的喷嘴孔径为9.0 mm,在6 m扬程时短距离泥浆输送末端流量为105.81 m3/h。结果表明基于伯努利效应的离析器具有体积小、出流量大、泥浆浓度高等优点,能较好适应河道宽度、水深、土质等要素变化。

A main objective of this paper is the successful design of the dredging eductor on the platform of Solid- Works, which will mainly applied to the small river. The fluid mechanical test methods validate for the effect of dredging eductor. Laboratory research on the pipeline sediment and density with three different diameter nozzles in 1/4 of ful- lopen valve condition were conducted and a 9.0 mm diameter nozzle was then recommended. Operating parameters were analyzed on two case conditions of 235 meters and 45 meters pipe translation distances. The prototype tests were carried out and then flow were measured for 105.81m3/h in 6m head high at the end of 45 meters pipe. The results showed that, based on the Bernoulli effect, the dredging machine is designed with small size, huge flow out, and high mud con- centration. The machine has also the ability to adapt easily with the changeable parameters of river width, water depth and soil texture, etc.