冷却塔涡轮机全椭圆轴向出水蜗壳的水力设计
发布时间：2018-08-20 13:26
【摘要】：由于大型机械冷却塔内部空间狭小,驱动风机的涡轮机应尽可能减小尺寸、提高效率。为此在结构方面设计出全椭圆形断面下端轴向出水的特型蜗壳,大大减小了涡轮机径向尺寸。并结合传统蜗壳的设计理论推导出全椭圆轴向出水蜗壳在稳态下的水力设计方法,通过实例设计与数值模拟分析可验证,特型蜗壳的流态模拟数据与设计工况的理论值相符,且水力损失仅有1.05%,涡轮机的整体效率可达88.25%,性能稳定。所设计的涡轮机因其结构小巧,可直接安装在冷却塔的内部,对现有电动风机冷却塔的节能改造具有广泛的应用前景。
[Abstract]:Because the inner space of large mechanical cooling tower is narrow, the turbine driving fan should be reduced as much as possible and the efficiency should be improved. For this reason, a special volute case with axial outlet at the bottom end of the whole elliptical section is designed, which greatly reduces the radial size of the turbine. Combined with the design theory of the traditional volute, the hydraulic design method of the whole elliptical axial outlet volute under steady state is deduced. It can be verified by the example design and numerical simulation analysis that the flow state simulation data of the special volute is in accordance with the theoretical value of the design condition. The hydraulic loss is only 1.05 and the overall efficiency of the turbine can reach 88.25 and the performance is stable. The designed turbine can be directly installed in the cooling tower because of its small structure. It has a wide application prospect for the energy-saving transformation of the existing electric fan cooling tower.
【作者单位】： 河海大学能源与电气学院;河海大学水利水电学院;
【分类号】：TV136
本文编号：2193776
[Abstract]:Because the inner space of large mechanical cooling tower is narrow, the turbine driving fan should be reduced as much as possible and the efficiency should be improved. For this reason, a special volute case with axial outlet at the bottom end of the whole elliptical section is designed, which greatly reduces the radial size of the turbine. Combined with the design theory of the traditional volute, the hydraulic design method of the whole elliptical axial outlet volute under steady state is deduced. It can be verified by the example design and numerical simulation analysis that the flow state simulation data of the special volute is in accordance with the theoretical value of the design condition. The hydraulic loss is only 1.05 and the overall efficiency of the turbine can reach 88.25 and the performance is stable. The designed turbine can be directly installed in the cooling tower because of its small structure. It has a wide application prospect for the energy-saving transformation of the existing electric fan cooling tower.
【作者单位】： 河海大学能源与电气学院;河海大学水利水电学院;
【分类号】：TV136
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