雨水泵站水泵安装平台水流冲击力的分析计算

Analysis and Calculation of Water Flow Stress on Pump Installation Platform in Rainwater Pumping Station

在雨水泵站新建和改造工程设计过程中,需要计算安装潜水轴流泵的井筒底座所受的水流冲击力,为结构专业提供设计荷载。相关技术人员通常根据厂家水泵样本中提供的数据进行土建结构设计,但水泵样本中的数据是在特定实验条件下得到的,不具备通用性。为此,通过工程实例,根据700QZ-70G型潜水轴流泵配套的DN1100钢制井筒具体安装形式和使用条件进行受力分析,应用恒定总流的伯努利方程和动量方程较精确地计算出了潜水轴流泵井筒底座所受的水流冲击力,可为经济合理地设计泵站结构提供参考。

In the design phase of new construction and renovation of rainwater pumping stations,it is essential to assess the water flow stress on the shaft base equipped with submersible axial flow pumps to calculate the design load for structural profession.Typically,the relevant engineers design the civil structure based on the data provided in the manufacturer’s pump sample;however,it is important to note that this data is derived from specific experimental conditions and lacks generalizability.Consequently,the stress was analyzed through engineering case studied and in accordance with the installation configuration and operational conditions of the DN1100 steel shaft supporting the 700QZ-70G submersible axial flow pump,and the water flow stress exerted on the shaft base of the submersible axial flow pump was accurately calculated utilizing both Bernoulli’s equation and the momentum equation under constant total flow conditions,thereby providing valuable insights for the economical and rational design of pumping station structures.