某核电厂应急柴油机吹车试验的控制
2020-06-22程亚静傅天君黄棋许惠明
程亚静 傅天君 黄棋 许惠明

【摘 要】某核电厂应急柴油机采用德国MTU机型,由于柴油机厂房设计原因,整体更换比较困难,如出现曲轴、轴瓦等关键敏感部件的重大缺陷,更换柴油机需耗费大量的时间、人力、财力,同时影响电厂的安全运行。根据上述情况,从预防设备失效的角度,寻找减少应急柴油机启动磨损的方法,提出可行性技术创新方案,通过现场验证,提高某核电厂机组应急柴油机的寿命及可靠性。
【Abstract】The emergency diesel engine of a certain nuclear power plant adopts the German MTU model, because of the diesel engine factory building design reason, the overall replacement is more difficult, such as the appearance of the major defects of crankshaft, bearing and other key sensitive parts, the replacement of diesel engine takes a lot of time, manpower, financial resources, at the same time affects the safe operation of the power plant. According to the above situation, from the point of preventing the failure of equipment, the method of reducing the starting wear of emergency diesel engine is found, and the feasible technical innovation scheme is put forward, and the life and reliability of emergency diesel engine of a nuclear power plant unit are improved by field verification.
【关键词】应急柴油机;可靠性;寿命;应急柴油机吹车;再鉴定
【Keywords】emergency diesel engine; reliability; life; emergency diesel engine blowing; re-identification
【中图分类号】TM341 【文獻标志码】A 【文章编号】1673-1069(2020)03-0154-02
1 引言
百万千瓦应急柴油机组本体巨大,且发电机与柴油机整体坐落在同一抗震平台,无法分离[1]。因此,无法通过防台门出入,在安装期间也是通过预留墙孔进入厂房,随后再完成厂房封堵。如果一旦发生曲轴、轴瓦等关键部件故障时,必然将影响机组的安全稳定运行。针对上述客观原因的存在,柴油机再鉴定期间通过优化再鉴定方法,对主要部件提前供润滑油,有利于减少柴油机主要部件的磨损,降低曲轴、轴瓦产生故障的概率。
2 柴油机曲轴与轴瓦故障模式及吹车方案
经过分析曲轴与轴瓦产生故障的因素有:
①曲轴、轴瓦质量缺陷;
②轴瓦安装时出现偏差;
③异物进入曲轴与轴瓦之间;
④曲轴与轴瓦之间润滑不良,冷却不足。
针对因素①、②,目前柴油机已运行较长时间,情况良好,出现故障概率极低;针对因素③,柴油机润滑油系统内设置了主过滤器、预润滑油过滤器及活塞油过滤器,且每年有定期清洗更换工作,出现的概率也较低;针对因素④,润滑油回路每年都会进行换油工作,需要将滑油系统排空。……
