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《Cryogenic Technology》 2010-04
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Analysis of causes of several times of burning out of rotor and bushing and the treatment

Wang Zhangjun(Safe Production Department,Yunnan Tianda Chemical Industry Co.,Ltd.,Caopu Town,Anning 650309,Yunnan,P.R.China)  
Since putting into operation of Model LK-48/7.0-0.54 boosting turbine expander,the expander has been protected by interlocking of instrument in case of several times of tripping resulted from fault of special oil station.However,the rotor and the bushing were burnt out due to failure of the expander to stop.The technical process and parameters of the expander and the structure of urgent cut-off valve are described,and the analysis of the stress and its magnitude of core of the urgent cut-off valve shows that the fault is mainly resulted from incorrect installation of urgent cut-off valve.After installation of the urgent cut-off valve through rotation by 180°,the fault is eliminated.
【CateGory Index】: TB653
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