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以太阳集热管的玻璃外管为研究对象,采用临界冲击破损能量测试方法,重点探讨玻璃管直径、壁厚、放置时间等因素对玻璃管临界冲击破损能量的影响。结果表明:玻璃管临界冲击破损能量分布基本呈正态分布形态,随着直径的增大,玻璃管的临界冲击破损能量平均值增长率与玻璃直径增长率的平方成正比;随着壁厚的增大,玻璃管的临界冲击破损能量增长率与玻璃壁厚增长率成正比;随着放置时间的延长,玻璃管临界破损能量呈现非线性衰减规律,大气环境水中的OH-是引起玻璃管强度降低主要因素。
Taking the glass outer tube of the solar collector tube as the research object, the critical impact damage energy measurement method is adopted, and the influence of the glass tube diameter, wall thickness and placement time on the critical impact damage energy of the glass tube is discussed. The results show that the critical impact damage energy distribution of glass tube is basically normal distribution. As the diameter increases, the average critical damage energy increase rate of glass tube is proportional to the square of glass diameter growth rate. With the increase of wall thickness Increases, the critical impact of glass tube damage energy growth rate is directly proportional to the growth rate of glass wall thickness; With the extension of time, the critical damage energy of glass tube shows nonlinear attenuation law, atmospheric water OH- is caused by the glass tube strength Reduce the main factors.