轴流泵的设计 本科生毕业设计

Iቤተ መጻሕፍቲ ባይዱI
扬州大学本科生毕业论文
目
摘 目
录
要 ................................................................................................................................................ I 录 ..............................................................................................................................................III 概述 ....................................................................................................................................1 一、轴流泵的特点和工作原理 ................................................................................................1 二、我国轴流泵模型发展概况 ................................................................................................1 三、设计意思和目的 ................................................................................................................2
一、叶轮的水力设计 ................................................................................................................3
二、叶轮绘型 ..........................................................................................................................15 （一）叶片绘型说明 ......................................................................................................15 （二）确定叶片旋转轴线位置 ......................................................................................16 （三）各截面展开图 ......................................................................................................16 （四）木模图绘制 ..........................................................................................................19 （五）叶片的轴面投影图 ..............................................................................................20 第三章 导叶设计 ..........................................................................................................................22 （一）导叶基本参数计算 ..............................................................................................22 （二）流线法设计导叶 ..................................................................................................22 二、导叶的绘型 ......................................................................................................................27 （一）导叶绘型说明 ......................................................................................................27 （二）导叶轴面图 ..........................................................................................................28 （三）导叶翼型展开图 ..................................................................................................29 （四）导叶平面图 ..........................................................................................................30 致 谢 ..............................................................................................................................................31 参考文献 ..........................................................................................................................................32 一、导叶的水力计算 ..............................................................................................................22
第二章
叶轮设计 ............................................................................................................................3 （一）叶轮设计流程 ........................................................................................................3 （二）叶轮基本参的选择数 ............................................................................................3 （三）流线法设计叶片 ....................................................................................................5 （四）选定截面及计算 ....................................................................................................7
Abstract ............................................................................................................................................. II 第一章
本科生毕业论文
毕业论文题目 学 生 姓 名 所 在 学 院 专 业 及 班 级 指 导 教 师 完 成 日 期
轴流泵的设计
阮天一
能 源 与 动 力 工 程 学 院 热 动 0901 陈松山 2013 年 6 月 2 日
扬州大学本科生毕业论文
摘
要
本毕业设计的项目是可调叶片式轴流泵——即叶片可调节倾斜角度。 泵设计最主要的是水力设计——叶片及导叶的水力设计。 叶片的水力设计采 用两种方法：圆弧法和升力法。经分析比较：采用圆弧法设计的轴面投影图叶片 更为光滑，难度相对更高。采用升力法设计的轴面投影图虽然比圆弧法设计的稍 微差点，但是，由于当今国内的制造水平对于三维曲面的加工还相对落后，即使 是好的设计也是难以加工出来的， 对于空间曲面加工效果好的机床是五轴联动机 床，国内包括在国内的外企，拥有五轴联动机床的公司屈指可数。回头来看升力 设计法，这种水力设计法虽然可能相对简陋，但是它简单实用，可操作性强，更 加适合初级设计人员，对于本科毕业生来说是更好的操练工具。 导叶则采用的是流线设计法。由于导叶是按锥面分流线，所以设计为空间导 叶。水力设计之后是结构设计。结构设计决定着泵的受力情况，影响到泵的许多 零件的强度问题，所以也是相当重要的。 此次设计主要依据关醒凡教授的《现代泵设计手册》进行水力设计，所有图 纸均采用 Auto CAD 软件绘制。 关键词：轴流泵 水力设计 叶片 导叶
I
扬州大学本科生毕业论文
Abstract
The object of the graduate design is to design an adjustable pump--just as what it is said that its blades are adjustable-pitches. The most important step in designing a pump is waterpower design-the design of the blades and lead blade. There are always two methods to be used to design pump cycle method and peace method. Put the two together: we find that the result after cycle method is better, the blades designed with it are more velvet, but it is more difficult. Compared with the cycle method, although the peace method is simple, however for present, manufacturing level is not component in three-dimensional products producing. I think there must be standout engineering, good conceive and good design home, but why all these advantage things can’t come to true, mainly because I think that there are a fat lot five-axis linkage machines in domestic companies, even includes external corporations in China. And let me look back to the peace method, although the method could be simper, it is more practically, be easy to deal with, and it is more suitable for the first class personnel, and is a practice tool. The lead blades are going to design with streamline method. Because the lead blades are partitioned through cone, so it will be designed into vacuum lead blade, and adopt the twist triangle method to product. Configuration design follows waterpower design. Configuration design determines the pressed conditions of pump, and it will impact much most intention of the part, so it is also very important. The design of hydraulic computation is on the basis of <Modern pump design handbook> edited by professor Guan Xingfan. All the drawings adopt the software of Auto CAD. Keywords: axial flow pump hydraulic design vane guide vane