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过程工程学报 ›› 2019, Vol. 19 ›› Issue (2): 345-353.DOI: 10.12034/j.issn.1009-606X.218208

• 过程与工艺 • 上一篇    下一篇

玻璃钢化季节性调压数值模拟

岳高伟1,2*， 刘 慧1， 吴恒博1， 李彦兵2   

  1. 1. 河南理工大学土木工程学院，河南 焦作 454000 2. 洛阳兰迪玻璃机器股份有限公司，河南 洛阳 471000
  • 收稿日期:2018-05-17 修回日期:2018-09-19 出版日期:2019-04-22 发布日期:2019-04-18
  • 通讯作者: 岳高伟 mxlygw@126.com
  • 基金资助:
    河南省高校科技创新团队支持计划资助

Numerical simulation of seasonal wind pressure regulating for tempered glass

Gaowei YUE1,2*, Hui LIU1, Hengbo WU1, Yanbing LI2   

  1. 1. School of Civil Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, China 2. Luoyang Landglass Machinery Incorporated Company, Luoyang, Henan 471000, China
  • Received:2018-05-17 Revised:2018-09-19 Online:2019-04-22 Published:2019-04-18

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摘要： 建立了风栅中玻璃的冷却模型，数值模拟玻璃冷却的温度和应力变化规律，反演了不同季节风温时的合理匹配风压。结果表明，在玻璃淬冷过程，约3 s时玻璃表面拉应力达到最大，若该应力大于玻璃此时的抗拉强度，玻璃将破裂。此后玻璃从外到内降温速率逐渐减小，在约15~17 s时玻璃表层受内部影响减弱，表面应力趋于稳定。与钢化玻璃表面应力测试结果相比，数值模拟结果略小，但相对误差不超过5%。随冷却风温降低，玻璃钢化所需的风压逐渐减小。在玻璃钢化程度接近的情况下，风压随风温降低近似线性减小，钢化风压调节量与环境温度变化量的相关系数为0.103 kPa/K。

关键词: 钢化玻璃, 风温, 风压, 钢化应力, 数值模拟

Abstract: Wind temperature and wind pressure are important factors affecting tempering degree of glass. And the reasonable matching relationship should be sought between wind pressure and wind temperature due to seasonal variation, which satisfied the quality requirements of tempered glass and achieve the effect of energy conservation. In this work, the air-grid model of glass tempering was established to numerically simulate the change rules of glass temperature and stress during glass specimen process, and at the same time, the reasonable wind pressure was numerically calculated to match the wind temperatures in different season. The results showed that in the process of glass cooling, the glass surface cooling rate was fastest, and the internal cooling rate was slower. And the cooling rate of glass decreased gradually from outside to inside, and the influences of glass inner to surface weakened. But the curves of internal cooling rate and surface cooling rate reversed at about 15~17 s which meant that the internal cooling rate was larger, while the external cooling rate was smaller. The glass surface stress weakened by the internal temperature difference, in other words, the surface stress tended to be stable from 15 to 17 s in cooling process. At about 3 s, the tensile stress on the glass surface reached the maximum and was greater than the stress at all internal positions. When the stress was greater than the tensile strength of the glass at this time, the glass started to crack from the surface. Compared with the stress test results of the tempered glass, the numerical results were slightly smaller, but the relative error was not more than 5%. With the decrease of cooling air temperature, the wind pressure required for glass tempering was also decreasing. When the tempering degree of glass was close, the wind pressure decreased approximately linearly with the decrease of wind temperature.

Key words: tempered glass, wind temperature, wind pressure, tempering stress, numerical simulation