电力科学与工程
電力科學與工程
전력과학여공정
INFORMATION ON ELECTRIC POWER
2015年
4期
58-65
,共8页
汽轮机轴系调整%轴承标高%基础沉降
汽輪機軸繫調整%軸承標高%基礎沉降
기륜궤축계조정%축승표고%기출침강
steam turbine shaft system tested%shafting elevation%foundation settlement
某台600 MW汽轮发电机组存在严重的轴承温度过高和振动不稳定隐患，在机组带负荷过程中，2号轴承金属温度已经达到95℃已影响到机组额定运行的能力。经测量检查存在轴系错位，需要进行揭缸大修、分析原因、消除缺陷、恢复机组的正常运行。通过对汽轮发电机组轴系标高的现场测量和相对标高的分析，得出轴系标高的不正常变化是导致2号轴承金属温度过高的主要原因之一。介绍了汽轮发电机组轴系的基本慨念和设计的主要内容，及轴系标高的现场测量方法，结合标高检测结果，经踪合分析，制定并实施了冷态下轴系标高调整方案，其中1号轴承标高的上抬，采用偏心轴承壳体，可满足轴系标高的调整要求。该机组大修后经运行考核，汽轮机的振动和轴承金属温度均在优良范围内。最后揭示了轴系标高的不正常变化与基础沉降之间一定的牵连关系，并提出在原基础沉降观测失控后的必要检查测量措施。
某檯600 MW汽輪髮電機組存在嚴重的軸承溫度過高和振動不穩定隱患，在機組帶負荷過程中，2號軸承金屬溫度已經達到95℃已影響到機組額定運行的能力。經測量檢查存在軸繫錯位，需要進行揭缸大脩、分析原因、消除缺陷、恢複機組的正常運行。通過對汽輪髮電機組軸繫標高的現場測量和相對標高的分析，得齣軸繫標高的不正常變化是導緻2號軸承金屬溫度過高的主要原因之一。介紹瞭汽輪髮電機組軸繫的基本慨唸和設計的主要內容，及軸繫標高的現場測量方法，結閤標高檢測結果，經蹤閤分析，製定併實施瞭冷態下軸繫標高調整方案，其中1號軸承標高的上抬，採用偏心軸承殼體，可滿足軸繫標高的調整要求。該機組大脩後經運行攷覈，汽輪機的振動和軸承金屬溫度均在優良範圍內。最後揭示瞭軸繫標高的不正常變化與基礎沉降之間一定的牽連關繫，併提齣在原基礎沉降觀測失控後的必要檢查測量措施。
모태600 MW기륜발전궤조존재엄중적축승온도과고화진동불은정은환，재궤조대부하과정중，2호축승금속온도이경체도95℃이영향도궤조액정운행적능력。경측량검사존재축계착위，수요진행게항대수、분석원인、소제결함、회복궤조적정상운행。통과대기륜발전궤조축계표고적현장측량화상대표고적분석，득출축계표고적불정상변화시도치2호축승금속온도과고적주요원인지일。개소료기륜발전궤조축계적기본개념화설계적주요내용，급축계표고적현장측량방법，결합표고검측결과，경종합분석，제정병실시료랭태하축계표고조정방안，기중1호축승표고적상태，채용편심축승각체，가만족축계표고적조정요구。해궤조대수후경운행고핵，기륜궤적진동화축승금속온도균재우량범위내。최후게시료축계표고적불정상변화여기출침강지간일정적견련관계，병제출재원기출침강관측실공후적필요검사측량조시。
In a power plant of a 600MW Steam turbine generator unit exists serious excessive bearing temperature and vibration instability risks.In the unit load process, 2# bearing metal temperature, which has reached 95℃, has affected the ability of unit rated operation.Checked by measurement, the existence of shafting dislocation make it essential to open the cylinder overhaul, analyze the reasons, eliminate defects and restore the normal operation of the unit.Through the analysis of the scene on the elevation of Steam turbine generator shaft system measurement and relative elevation, this paper concludes that shafting elevation abnormal change is one of the main causes of 2#bearing metal high temperature.Furthermore, it introduces the main contents of the basic concept and design of Steam turbine generator shaft system, and the field of shafting elevation measurement method, combined with the elevation of the detection result, the tracking and analysis, the formulation and implementation of the shafting ele-vation adjustment scheme of cold, which carried on 1#bearing elevation, using partial spindle bearing shell, can meet the needs of shafting elevation adjustment request.After operation examination, steam turbine vibration and the bearing metal temperature are within relevant range.Finally, the results reveal certain implicated relationship between settling shafting elevation abnormal change and foundation, and puts forward the necessary measures in check after getting out the original foundation settlement observation.
