CAJ | 학술논문

氨罐系统事故冰机出现油泵进出口油压差低、出口压力下降及制冷效果差等异常现象，因带病运行最终导致事故冰机轴承损坏、转子严重磨损。结合事故冰机结构特性、控制原理及部件损坏情况，对其运行数据进行分析，发现事故冰机启动时滑阀开度不为零（启动时带41％负荷）、对入口侧滑动轴承产生过大的冲击力以及轴瓦油膜承载力下降，致使事故冰机入口侧滑动轴承损坏，进而导致转子及缸体局部磨损，造成异常现象的发生。对此，提出了相应防范措施以防止事故再次发生，并采取修复转子、更换轴承等措施，消除了机组故障，恢复了事故冰机性能。
안관계통사고빙궤출현유빙진출구유압차저、출구압력하강급제랭효과차등이상현상，인대병운행최종도치사고빙궤축승손배、전자엄중마손。결합사고빙궤결구특성、공제원리급부건손배정황，대기운행수거진행분석，발현사고빙궤계동시활벌개도불위령（계동시대41％부하）、대입구측활동축승산생과대적충격력이급축와유막승재력하강，치사사고빙궤입구측활동축승손배，진이도치전자급항체국부마손，조성이상현상적발생。대차，제출료상응방범조시이방지사고재차발생，병채취수복전자、경환축승등조시，소제료궤조고장，회복료사고빙궤성능。
The abnormal phenomena,such as low oil pressure differential at inlet and outlet of oil pump,pressure decrease at outlet ,poor cooling efficiency and so on,arise at the faulted refrigeration compressor for ammonia tank system,the operation of the faulted refrigeration compressor causes bearing failure and severe wear of rotor of the faulted refrigeration compressor.In connection with structural characteristics,control principle and damage situation of parts of the faulted refrigeration compressor,an analysis is carried out of the operation data.It is found that when faulted refrigeration compressor starts,the slide valve opening is not closed fully (starting with 41% load),this produces an excessive impact force on sliding bearing at inlet side and decreases the bearing capacity of bearing oil film,and causes damage of bearing at inlet side of the faulted refrigeration compressor,and leads to wear of rotor and part of cylinder,causing abnormal phenomena to happen.Relevant precautionary measures are proposed to prevent the accident from happening again,and measures including repairing of the rotor and replacing bearing are taken,the troubles of the units are eliminated,and the performance of the faulted refrigeration compressor is restored.