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城市排水泵站侧向进水集水池水力特性研究
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摘要
城市排水泵站常年运行的流量变化一般很大,配泵机组台数较多,为节省占地面积,常采用布置较紧凑的侧向进水方式。对侧向进水集水池,一般会出现同池各水泵配水不均匀,池内流态紊乱、水泵吸水条件差,继而导致水泵效率下降、机组振动等问题。本文结合上海市污水治理三期工程汶水路泵站水力特性研究课题,探讨了改善侧向进水集水池水力特性的途径与方法,提出了有效的整流、均流措施。
     本文提出了改善侧向进水集水池水力特性的两种技术方案,即配水孔方案与流槽式配水方案。对每一种技术方案,应用数值模拟试验与水力物理模型试验相结合的研究方法,全面细致地研究了侧向进水集水池的水力特性。研究成果对改善侧向进水城市排水泵站水力特性、提高该类泵站的安全可靠性与高效经济性具有较好的指导意义与实用价值。
There are many units in an urban drainage pumping station where the flow usually varies from season. The side-inlet sump is often designed to save the area of the pumping station. The flow of every pump is inclined to be different in the same side-inlet sump and the poor flow pattern, and then the inlet condition of the pump is not good, which makes the efficiency of the pump drop and causes vibration etc. Based on the theses on the hydraulic characteristic of the Wenshui Road pumping station in the Third Period Shanghai Disposal Sewage project, the methods were discussed to improve the flow pattern of side-inlet sump, and the measures were put forward to ameliorate the flow pattern in the paper.
    Two kinds of technical approaches, the approach of the distribute-holes and the approach of the launder, were pointed to improve hydraulic characteristics of side-inlet sump in the paper. For each approach, a much more thorough study was made on the hydraulic characteristics of the side-inlet sump by the hydraulic model test and the numerical simulation. The conclusions from the paper were valuable in improving hydraulic characteristics of the urban drainage pumping station with side-inlet sump.
引文
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