160km/h动力集中动车组复合冷却塔研制

Development of composite cooling tower for 160km/h power concentrated EMU

冷却系统是动力集中动车组的重要子系统,冷却装置的散热性能、体积、质量、辅助功率和噪声控制一直是产品研发的技术瓶颈和难点,直接影响动车组运行的可靠性、经济性和环境友好性。为了在有限的空间内满足牵引变压器、牵引变流器和列车供电柜等牵引系统部件的散热要求,提高结构紧凑性、减小冷却装置质量,减少辅助功率消耗,控制噪声,提高散热器耐污脏性和可维护性,研制了160 km/h动力集中动车组复合冷却塔。该冷却塔采用了优化设计的水油一体化复合式高效散热器,采用了优化叶轮、导叶、风筒结构的高效低噪轴流风机,采用了轻量化设计的整体铝制承重结构。介绍了160 km/h动力集中动车组复合冷却塔的总体结构、工作原理、技术设计、仿真分析和试验验证等研制情况,并通过与既有典型电力机车复合冷却塔对比,说明160 km/h动力集中动车组复合冷却塔在多系统匹配、高效散热、低噪声、节能、轻量化设计等方面具有技术先进性。

Cooling system is an important subsystem of power concentrated EMU. The cooling performance, volume, weight, auxiliary power and noise control of cooling devices are the technical bottlenecks and difficulties in product research and development, which directly affect the reliability, economy and environmental friendliness of EMU operation. In order to satisfy the cooling requirement of traction system components including traction transformer, traction converter and power supply cabinet in limited space, make the structure more compact, reduce the cooling unit weight and auxiliary power consumption, control noise, and improve the radiator fouling resistance and maintainability, a composite cooling tower for 160 km/h power concentrated EMU was developed. The cooling tower adopted the optimized design of water-oil integrated compound radiator with high cooling efficiency, and axial flow fan with optimized impeller, guide vane, air duct structure, which had high efficiency and low noise. The whole structure was designed as a lightweight overall aluminum bearing structure. This paper introduced the overall structure, working principle, technical design, simulation analysis and test verification of the composite cooling tower for 160 km/h power concentrated EMU. By comparing with the existing typical composite cooling tower for electric locomotive, the paper shows that the composite cooling tower for 160 km/h power concentrated EMU is more advanced in terms of multi-system matching, efficient heat dissipation, low noise, energy conservation and lightweight design.