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多年来,我国许多电机的通风,多在电机上采用盆式(即离心式)风扇。因其设计不够合理,以致噪声大、耗电多、效率低(风扇的效率一般只有20～30%)。最近清华大学电机工程系设计了一种新型电机通风系统,采用了叶型先进的机冀型轴流风扇,并配以空气动力性能良好的风罩,使风扇效率提高到67%,节能2%以上,噪声下降5分贝(噪声在90分贝以下);电机的冷却用风量和电机温升与盆式风扇基本相同。这种风扇的特点是:在高效率条件下,压力和流量系数变化范围
Over the years, many of our motor ventilation, mostly in the use of pot-type (ie centrifugal) fan. Because of its design is not reasonable enough, resulting in noise, power consumption, low efficiency (fan efficiency is generally only 20 to 30%). Recently, Tsinghua University, Department of Electrical Engineering designed a new motor ventilation system, the use of advanced leaf-type Ji Ji axial fan, and with aerodynamic performance of the hood, the fan efficiency to 67%, saving 2% , The noise is reduced by 5 dB (the noise is less than 90 dB); the motor cooling air volume and motor temperature rise are basically the same as those of the basin fan. This fan features: In high efficiency conditions, pressure and flow coefficient range