大型低扬程水泵机组主要失效模式及其判别标准  

Main Failure Modes and Their Discriminant Criteria of Large Low-lift Pump Units

作　　者：仇宝云 杨益洲 严天序 龚维明[2] 陈北帅 

机构地区：[1]扬州大学,江苏扬州225127 [2]江苏省江都水利工程管理处,江苏扬州225200

出　　处：《流体机械》2015年第11期51-56,共6页Fluid Machinery

基　　金：国家自然科学基金项目(51379182);全国优秀博士学位论文作者专项基金项目(2007B41);江苏省普通高校研究生科技创新计划资助项目(CXZZ13_08)

摘　　要：大型水泵机组是大型泵站的关键设备。为了掌握机组的可靠耐久性,对机组故障进行了统计分析,遴选出机组关键易损部件:水泵导轴承、叶轮叶片、电机定子、电机推力轴承;确定主要失效模式:水泵导轴承磨损,叶片汽蚀、断裂,电机定子绝缘老化和推力轴承烧损。分析确定了各易损部件主要失效模式的失效判别标准。本文成果对提高大型水泵机组可靠耐久性,指导泵站维护管理,合理确定机组大修周期有重要意义。Large water pump units are key equipment of large pumping stations. In order to master the reliability and durability of the units, statistics analysis was performed about faults of the units ; the guide bearing of the pump, the blade of the impeller and the motor stator were selected as the key damageable parts; the main failure modes were determined as： wear of the guide bearing, cavitation and fracture of the blade, insulation aging of the motor stator and burnout of thrust bearings of the motor. The failure criteria of the key damageable parts were investigated and determined. The results of this paper is significant for improving the reliability and durability of large pump units, guiding maintenance and management of pump stations and determining rational overhaul cycle of pump units.

关 键 词：大型水泵机组 易损部件 失效模式 判别标准 

分 类 号：TH31[机械工程—机械制造及自动化] TV675[水利工程—水利水电工程]