热力发电
熱力髮電
열력발전
Thermal Power Generation
2015年
9期
105-108
,共4页
亚临界%300MW机组%汽轮机%高压转子%中压转子%共振%模态分析%ANSYS软件
亞臨界%300MW機組%汽輪機%高壓轉子%中壓轉子%共振%模態分析%ANSYS軟件
아림계%300MW궤조%기륜궤%고압전자%중압전자%공진%모태분석%ANSYS연건
subcritical%300 MW unit%steam turbine%HP rotor%IP rotor%resonant vibration%modal analysis%ANSYS software
针对汽轮机高、中压转子的共振问题,结合某亚临界300 MW机组汽轮机高、中压转子的结构特点,对该转子振动进行模态分析,采用数值仿真有限元软件 ANSYS,计算得出该转子的前6阶固有频率及其临界转速。结果显示：汽轮机的工作转速(3000 r/min)一般不会达到转子的后3阶临界转速,因此转子在后3阶不会出现共振现象；在实际运行中,当转子工作转速经过前3阶时,应快速通过并远离此时的临界转速避免转子发生共振。
針對汽輪機高、中壓轉子的共振問題,結閤某亞臨界300 MW機組汽輪機高、中壓轉子的結構特點,對該轉子振動進行模態分析,採用數值倣真有限元軟件 ANSYS,計算得齣該轉子的前6階固有頻率及其臨界轉速。結果顯示：汽輪機的工作轉速(3000 r/min)一般不會達到轉子的後3階臨界轉速,因此轉子在後3階不會齣現共振現象；在實際運行中,噹轉子工作轉速經過前3階時,應快速通過併遠離此時的臨界轉速避免轉子髮生共振。
침대기륜궤고、중압전자적공진문제,결합모아림계300 MW궤조기륜궤고、중압전자적결구특점,대해전자진동진행모태분석,채용수치방진유한원연건 ANSYS,계산득출해전자적전6계고유빈솔급기림계전속。결과현시：기륜궤적공작전속(3000 r/min)일반불회체도전자적후3계림계전속,인차전자재후3계불회출현공진현상；재실제운행중,당전자공작전속경과전3계시,응쾌속통과병원리차시적림계전속피면전자발생공진。
Against the resonant problem in high pressure (HP)and intermediate pressure (IP)rotors in steam turbines,the HP-IP rotor vibration modal of a subcritical 300 MW unit steam turbine was analyzed using numerical simulation software ANSYS,on the basis of the HP-IP rotor structure features.The first 6 orders'natural frequency and the critical speed of the HP-IP rotor for this 300 MW unit steam turbine are obtained and the results were compared with that of the steam turbine with normal working speed (3 000 r/min).It shows that,generally,the working speed of steam turbine will not reach the last 3 orders'critical speed.Therefore,the resonant problem will not occur in the last 3 orders.During the practical operation, when the rotor's working speed goes through the first 3 orders,it should goes quickly and gets away from the critical speed to avoid the resonant vibration.
