山西电力
山西電力
산서전력
SHANXI ELECTRIC POWER
2015年
4期
59-61
,共3页
600 MW机组%汽轮机%低发靠背轮%有限元分析
600 MW機組%汽輪機%低髮靠揹輪%有限元分析
600 MW궤조%기륜궤%저발고배륜%유한원분석
600 MW unit%steam turbine%turb-gen coupling%finite element analysis
针对机组检修、运行中发现的问题,在对某型600 MW低发靠背轮结构进行分析的基础上,对低发靠背轮进行了传扭能力和三维有限元计算分析。结果表明,螺栓伸长量为0.62 mm时,螺栓最大等效应力达到1790 MPa,接近螺栓材料屈服极限930 MPa的2倍,导致螺栓发生弯曲变形,应力集中加剧。
針對機組檢脩、運行中髮現的問題,在對某型600 MW低髮靠揹輪結構進行分析的基礎上,對低髮靠揹輪進行瞭傳扭能力和三維有限元計算分析。結果錶明,螺栓伸長量為0.62 mm時,螺栓最大等效應力達到1790 MPa,接近螺栓材料屈服極限930 MPa的2倍,導緻螺栓髮生彎麯變形,應力集中加劇。
침대궤조검수、운행중발현적문제,재대모형600 MW저발고배륜결구진행분석적기출상,대저발고배륜진행료전뉴능력화삼유유한원계산분석。결과표명,라전신장량위0.62 mm시,라전최대등효응력체도1790 MPa,접근라전재료굴복겁한930 MPa적2배,도치라전발생만곡변형,응력집중가극。
This article focuses on the unit maintenance and operation problems of operating unit, and based on the low coupling structure analysis, three-dimensional finite element calculation and analysis were performed. The results show that when bolt elongation is 0.62 mm, the maximum equivalent stress of the bolt will reach 1 790 MPa, nearly reaching the twice of the material yield limit(930 MPa), which can reslut in bolt bending deformation, and make the stress concentration intensified.