水压胀合高压釜衬里的力学模型及试验研究

探索一种新的液压胀合技术——水压胀合法，并评估其贴合效果。水压胀合法是利用高压釜整体水压试验时的压力来胀合衬里，使衬里产生塑性流动，达到全部或部分消除衬里与壳体之间的初始间隙。按照弹——塑性理论推导出力学模型，通过实测层间间隙、应力和应变来评估其贴合效果。结果表明：理论计算值与实测结果基本一致，最大误差为13．8％；尽管最大的初始间隙达16mm，但经胀舍处理后残余间隙仅在0．6～0．9mm之间；壳体材料在升压循环过程中处于弹性范围内，在内压大于3．1MPa时，衬里和壳体基本变为一体化材料，应力与内压力的线性相关系数大于0．99。

Mechanics Model and Experimental Researches on Hydraulic Bulge Lining of High Pressure Reactor

New hydraulic bulge technique was invented,and its conjoint results were also estimated.High pressure reactor's overall water pressure test was used to bulge lining plastic deformation,then eliminate the gap between lining and shell.According to elastic-plastic theory,the mechanics model was induced.The conjoint result was estimated by measured layer gap,stress and strain.The results show that theoretical calculation is basicly consistent with actual results,the biggest error is(13.8%);although the biggest preliminary clearance reaches 16mm,remnant clearance is only 0.6~0.9mm after hydraulic bulge;during pressure increasing test,shell material always keeps elastic.Lining and shell almost become an integrated material after the initial pressure more than(3.1)MPa,the linearity between cylinder stress and initial pressure is more than 0.99.