大中型高效电机后倾式离心风扇的优化设计

Optimal Design of the Centrifugal Fans with Backward Blades for Large and Medium High-Efficiency Motor

优化设计高效、高性能的电机外风扇是提高大中型高效电机效率的关键措施之一。通过分析离心风扇风压-风量特性,提出后倾式离心风扇的优化设计方法。对比分析了某项目YXKK710-4高效电机优化前后离心风扇的性能,并对优化前后离心风扇对电机效率、噪声和温升的影响进行了试验研究。结果表明,优化后的风扇更接近工作点,效率、噪声等性能指标更优,验证了所提后倾式离心风扇优化设计方法的合理性和可靠性,可为提高电机效率和性能及研制系列高效电机提供思路和指导。

Design and optimization of high-performance external fans are important to improve the efficiency of large and medium high-efficiency motors.We propose an optimal design method of centrifugal fans with backward blades by analyzing the characteristics of centrifugal fans.Taking a YXKK710-4 high-efficiency motor as the object,the performance and working point of the centrifugal fan are analyzed,and the effects of the centrifugal fan on the efficiency,noise and temperature rise of the motor are tested.The results show that in comparison with the original design,the optimized centrifugal fan is closer to the working point,and the performance data such as efficiency and noise are better.The rationality and reliability of the proposed method are verified.This research can provide guidance for the improvement of motor performance and efficiency,and for the development of series high-efficiency motor products as well.