螺旋离心泵结构设计——正文2课案.docVIP

摘 要 设计了一台用于输送固液两相流体的螺旋离心泵。本文的设计重点和难点是螺旋离心泵特有的是三维螺旋叶轮的设计。因此，叶轮设计是以何希杰和劳学苏提出的螺旋离心泵叶轮叶片工作面和负压面空间曲线方程为依据进行的设计，叶轮叶片型线为对数螺旋线。根据设计参数和工作条件的要求，在设计上采用固液两相流理论对叶轮、背叶片、压出室等泵过流部件进行水力设计。说明书从螺旋离心泵的结构设计开始，分别进行了叶轮的设计与绘形、压水室及吸水室的设计、轴向力极其平衡、主要通用零部件的选择、V型带传动设计和离心泵主要零部件的强度计算。 本文为设计高效螺旋离心泵提供了一个重要的参考依据。 关键词 固液两相流 螺旋离心泵 三维螺旋叶轮 空间曲线 对数螺旋线 Abstract The article designs a screw centrifugal pump used to transport the mix flows of solid and liquid. The emphases and difficulty of the article is the design of three dimensional screw impeller owned by screw centrifugal pump. So, the design of impeller is designed with the space curve screw equation of impeller vane work surface of screw centrifugal pump and minus pressure surface raised by Xue su LAO and Xi jie HE. I take it as the gist of design. The impeller vane line is logarithm screw curve. Accord to the design parameter and the require of work condition, on the design , we do waterpower design to impeller , back vane, press out house and some flow over parts with the theory of the mix flows of solid and liquid. The article starts with structure design of screw centrifugal pump, and design the calculation and drawing of impeller, pressure out house and off water house, the force of direction of axis and its balance, the choice of the main parts in common use, the transmission design of V strip and intensity calculation of the parts of screw centrifugal pump. The article provides an important reference for designing the high efficiency screw centrifugal pump Key words the mix flows of solid and liquid screw centrifugal pump three dimensional screw impeller the space the curve logarithm screw curve 一般部分 第一章 绪论 1.1螺旋离心泵概述 泵是把原动机的机械能转换为抽送液体能量的机器。一般，原动机通过泵轴带动叶轮旋转，对液体做功使其能量增加，从而使要求数量的液体从吸入口通过泵的过流部分，输送到要求的高度或要求有压力的地方。 泵是世界上最早发明的机器之一。现今世界上泵产品产量仅次于电机，所消耗的电量大约为总发电量的四分之一。泵的种类甚多，应用极为广泛。除农田灌溉、城市和工业给排水、热电厂、石油炼厂、石油矿厂、输油管线、化工厂、钢铁厂、采矿、造船等部门外，目前泵在原子能发电、舰艇的喷水推进、火箭的燃料供给等方面亦得到重要应用。另外，还可以用泵来对固体如煤、鱼等进行长距离水力输送。泵抽送的介质除水外，有油、酸、碱浆料……一