热量表机械式流量计防堵塞原理及SST技术  

Principle for Preventing Clogging of Mechanical Flowmeter of Heat Meter and SST Technology

作　　者：李世武[1] 

机构地区：[1]西北工业大学动力与能源学院,陕西西安710072

出　　处：《煤气与热力》2008年第2期18-21,共4页Gas & Heat

基　　金：航空科学基金项目(2003C53018)

摘　　要：介绍了热量表采用的电磁式、超声波式、机械式流量计的技术特点。分析了机械式流量计存在的堵塞、磨损、叶轮转速信号检测失灵、结垢问题。比较了单流束与多流束机械式流量计结构,机械式流量计的防堵塞结构应对流体不分流,流道简单,叶轮与叶轮腔之间有较大的间隙。探讨了具有对称结构、直通式进出水流道、独立横轴叶轮系统的SST技术的机械式流量计。The technical characteristics of electromagnetic, ultrasonic and mechanical flowmeters used in heat meters are introduced. The problems of clogging, attrition, signal detection failure of impeller rotation rate and scale existing in mechanical flowmeters are analyzed. The structures of single-jet and multi-jet mechanical flowmeters are compared. The structure of preventing clogging of mechanical flowmeter should be characterized by nondivided fluid, simple flow channel and bigger gap between impeller and cavity. The mechanical flowmeter with symmetry structure, straight flow channel and stand alone transverse axis impeller set （SST technology） is discussed.

关 键 词：热量表 机械式流量计 堵塞 SST技术 

分 类 号：TU995[建筑科学—供热、供燃气、通风及空调工程]