压力容器
壓力容器
압력용기
2013年
11期
1-7
,共7页
高温%法兰密封%螺栓载荷%有限元模拟
高溫%法蘭密封%螺栓載荷%有限元模擬
고온%법란밀봉%라전재하%유한원모의
high temperature%flange sealing%bolt loads%finite element simulation
建立了高温下法兰-螺栓-垫片实验装置，采用热电偶测量温度，并采用中温应变片测量螺栓载荷，试验研究不同法兰内壁温度下，各组件的温度分布以及螺栓载荷的变化规律；同时，建立了与试验工况相同的高温法兰稳态热-结构耦合有限元模拟模型，利用试验数据对模拟结果进行了验证。结果表明，高温下沿法兰内壁至法兰外沿会形成明显的温度梯度。法兰内壁、法兰外壁、螺栓、法兰外沿4个位置的温度依次降低。在本试验的法兰、螺栓及垫片属性下，随着法兰内壁温度升高，螺栓载荷降低，且载荷的均匀程度也降低。试验结果与数值模拟结果表明，采用有限元模型研究高温下法兰密封性能是可行的。
建立瞭高溫下法蘭-螺栓-墊片實驗裝置，採用熱電偶測量溫度，併採用中溫應變片測量螺栓載荷，試驗研究不同法蘭內壁溫度下，各組件的溫度分佈以及螺栓載荷的變化規律；同時，建立瞭與試驗工況相同的高溫法蘭穩態熱-結構耦閤有限元模擬模型，利用試驗數據對模擬結果進行瞭驗證。結果錶明，高溫下沿法蘭內壁至法蘭外沿會形成明顯的溫度梯度。法蘭內壁、法蘭外壁、螺栓、法蘭外沿4箇位置的溫度依次降低。在本試驗的法蘭、螺栓及墊片屬性下，隨著法蘭內壁溫度升高，螺栓載荷降低，且載荷的均勻程度也降低。試驗結果與數值模擬結果錶明，採用有限元模型研究高溫下法蘭密封性能是可行的。
건립료고온하법란-라전-점편실험장치，채용열전우측량온도，병채용중온응변편측량라전재하，시험연구불동법란내벽온도하，각조건적온도분포이급라전재하적변화규률；동시，건립료여시험공황상동적고온법란은태열-결구우합유한원모의모형，이용시험수거대모의결과진행료험증。결과표명，고온하연법란내벽지법란외연회형성명현적온도제도。법란내벽、법란외벽、라전、법란외연4개위치적온도의차강저。재본시험적법란、라전급점편속성하，수착법란내벽온도승고，라전재하강저，차재하적균균정도야강저。시험결과여수치모의결과표명，채용유한원모형연구고온하법란밀봉성능시가행적。
The experimental device of flange-bolt-gasket system in high temperature is set up.The ther-mocouples were selected to measure the temperature and the medium temperature strain gauges were a-dapted to test the bolt loads.The temperature distribution and the bolt load changes in high temperature were studied experimentally.Moreover,the thermal-structure coupling finite element model correspond-ing to the structure in experiments was established and verified using experimental results.The results in-dicate that the temperature gradient was formed along the radical direction of flange in high temperature. The temperature of inner surface of flange,outer surface of flange,bolt and outer border of flange decrea-ses successively.With the properties of flanges,bolts and gasket in the experiments,bolt loads decrease with the increase of temperature of inner surface,the same as the uniformity degree of the loads.The com-parison of numerical and experimental results indicates that it is feasible to study the sealing performance of flange-bolt-gasket system in high temperature by using finite element simulation.
