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气垫装置广泛应用于热处理线上非接触稳定地传输带钢或塑料、纸质等薄膜制品。气体动力性能作为气垫稳定装置的关键参数,是其结构设计和相关设备选型的理论依据。结合理论计算与数值模拟研究,主要分析了狭缝喷射气垫装置的结构参数(垫升高度、狭缝宽度等)与运行参数(如气垫压力、射流速度)等条件对气垫流场压力分布特性(均匀性、幅值、压力系数)的影响。结果表明:气垫垫升高度h越小,狭缝宽度b越大,气垫箱体压力值越大,气垫层稳定压力值Pc越大,狭缝喷嘴间距对Pc值无显著影响。研究结果为实现主动型气垫稳定装置在热镀锌带钢生产现场实际应用中提供参考依据。
Air cushion device is widely used in heat treatment on-line non-contact and stable transmission strip or plastic, paper and other film products. Gas dynamic performance as a key parameter of air cushion stabilizer is the theoretical basis of its structural design and related equipment selection. Combining with the theoretical calculation and numerical simulation, the pressure distribution characteristics of the air cushion flow field (such as the parameters of cushion height and slit width) and operating parameters (such as air cushion pressure and jet velocity) are mainly analyzed Uniformity, amplitude, pressure coefficient). The results show that the smaller the height of air cushion h is, the larger the width of slit b is, the larger the pressure value of cushion body is and the larger the steady pressure value Pc of air cushion is, the distance of slit nozzle has no significant effect on the value of Pc. The results provide a reference for realizing active air cushion stabilizer in the practical application of hot dip galvanized strip production site.