罗茨鼓风机工作过程与性能的试验研究  

Experimental research on the working process and performance of a roots blower

作　　者：谷朋泰 邓志成 汪勇 李治 方超 杨凯镟 GU Pengtai;DENG Zhicheng;WANG Yong;LI Zhi;FANG Chao;YANG Kaixuan(Shanghai Power Equipment Research Institute Co.,Ltd.,Shanghai 200240,China)

机构地区：[1]上海发电设备成套设计研究院有限责任公司,上海200240

出　　处：《流体机械》2023年第5期9-15,共7页Fluid Machinery

基　　金：国家电投集团统筹研发基金项目(TC2019HD10)。

摘　　要：为了测试罗茨鼓风机在不同运行工况下的性能变化规律,设计并搭建了罗茨鼓风机性能测试试验台,在机壳不同位置布置4个压力传感器,测得了鼓风机在一个完整工作周期内的压力变化,进而根据V-θ图,得到了一个工作周期内的p-V图。在不同转速和压比工况下,实测了一台小型三叶罗茨鼓风机的排气量和功率等性能数据,分析了其容积效率、机械效率、绝热效率和排气温度等参数随运行工况的变化规律。结果表明,罗茨鼓风机内部的压力上升分为110°~180°与180°~200°两个近似线性变化阶段,这与理论上认为的压力上升是在接通排气口时瞬间完成有一定区别;在压比为1.3的工况下,转速从1800 r/min增加到3000 r/min,容积效率和机械效率分别提升8.4%,10.1%,绝热指示效率和绝热效率分别下降7.2%,1.4%。研究成果对小型罗茨鼓风机的设计和运行具有参考意义。In order to test the performance change law of roots blower under different operating conditions,a performance test bench for roots blower was designed and built.Four pressure sensors were arranged at different positions of the casing to measure the pressure change of the blower in a complete working cycle,and according to V-θdiagram,the p-V diagram in one work cycle was obtained.Moreover,the performance data such as flow rate and power consumption of a small-scale three-lobed roots blower were measured under different operating conditions of rotating speed and pressure ratio.The changes of its volumetric efficiency,mechanical efficiency,adiabatic efficiency and exhaust temperature were analyzed.The results show that the inner pressure increase of the roots pump can be divided into 2 approximate linear phases,namely within the range of 110°~180°and 180°~200°,which is different with the theoretical conclusion that the pressure increase is completed instantly when connected to the exhaust port.Under the pressure ratio of 1.3,when the rotating speed increases from 1800 r/min to 3000 r/min,volumetric efficiency and mechanical efficiency increase by 8.4%and 10.1%,while adiabatic indication efficiency and adiabatic efficiency decrease by 7.2%and 1.4%,respectively.The results of the study can be used as reference for the design and operation of smallscale Roots blowers.

关 键 词：罗茨鼓风机 工作过程 P-V图 机械效率 容积效率 试验研究 

分 类 号：TH44[机械工程—机械制造及自动化]