燃气采暖热水炉风机风压取样点研究

Analyze on Location of Air Pressure Sampling Spot on Gas-Fired Boiler

本文研究常规大气式壁挂炉风压取样点位置与结构在低电压工况及烟管堵塞工况下风压大小的变化。为改善部分壁挂炉在低电压风压与烟管堵塞风压保护值差距较小的问题,在风机上选取了不同位置的取压点并设计了不同的取压结构进行测试分析。实验数据表明,改变风机上取压点的位置,沿蜗壳出风口切线方向延伸以及改变取压结构,对壁挂炉低电压风压与堵塞烟管风压保护值差值变大,能改善低电压工况与堵塞烟管工况重合导致的机器无法低电压运行的情况,以提高整机适应能力。

This thesis studies different air pressure through sampling at chosen spots and scheme designs under low voltage,with flue pipe blocked,analysis on which helps to enlarge gap,which is unable to trigger the protective scheme if too small,of air pressure on both sides.The experiment data reflects that gap between air pressures measured can be enlarged as chosen sampling spot changes in the parallel direction of smoke exhausting vertically from the snail-body shaped fan,which enhances the boiler's adaptability under low voltage,with flue pipe blocked.