轴流式风机的性能测试及分析.docx

轴流式风机的性能测试及分析
摘要
轴流式风机在火力发电厂及当今社会中得到了非常广泛的运用。本文介绍了轴流式风机的工作原理、叶轮理论、结构型式、性能参数、性能曲线的测量、运行工况的确定及调节方面的知识,并通过实验结果分析了轴流式风机工作的特点及调节方法。
关键词：轴流式风机、性能、工况调节、测试报告

目录
1绪论
1.1风机的概述·····························································4
1.2风机的分类·····························································4
1.3轴流式风机的工作原理···················································4
2轴流式风机的叶轮理论
2.1概述··································································4
2.2轴流式风机的叶轮理论··················································4
2.3速度三角形····························································5
2.4能量方程式·····························································6
3轴流式风机的构造
3.1轴流式风机的基本形式···················································6
3.2轴流式风机的构造·······················································7
4轴流式风机的性能曲线
4.1风机的性能能参数·······················································8
4.2性能曲线······························································10
5轴流式风机的运行工况及调节
5.1轴流式风机的运行工况及确定············································11
5.2轴流式风机的非稳定运行工况············································11
5.2.1叶栅的旋转脱流·······················································12
5.2.2风机的喘振···························································12
风机并联工作的“抢风”现象·············································13
5.3轴流式风机的运行工况调节··············································14
5.3.1风机入口节流调节·····················································14
5.3.2风机出口节流调节·····················································14
5.3.3入口静叶调节·························································14
5.3.4动叶调节·····························································15
5.3.5变速调节·····························································15
6轴流风机性能测试实验报告
6.1实验目的······························································15
6.2实验装置与实验原理····················································15
用比托静压管测定质量流量
风机进口压力
风机出口压力
风机压力
容积流量计算
风机空气功率的计算
风机效率的计算
6.3数据处理·····························································