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介绍了作者在研制离心式万能试验风扇及其叶片角度测量仪的基础上,对175F型柴油机冷却风扇叶片(A型叶片)、参照其它样机设计的B型叶片和优化设计的C型叶片,在万能试验风扇上进行不同叶片数目、不同叶片内外径比值、不同叶片进出口安装角、不同进风方式及不同导风装置的优化试验研究,获得的优化风扇及其导风装置与175F型柴油机原产品风扇及其导风装置相比,性能得到全面提高,在标定工况转速下风量增大27％,静压提高57％,消耗功率降低22％,噪声降低3dB(A),经温度场对比试验表明,气缸温度下降8～10℃,气缸盖温度下降10～12℃,有效地降低了柴油机的热负荷。
Based on the research of centrifugal universal testing fan and its blade angle measuring instrument, this paper introduced the design of 175F diesel engine cooling fan blade (A type blade), B type blades with other prototypes and C type optimized blade The universal test fan has different numbers of blades, different inner-outer diameter ratio of blades, different mounting angles of blades, different inlet air modes and different air-guiding devices. The optimized fan and its air-guiding device and 175F diesel engine Compared with the product fan and its air guide, the performance of the fan has been greatly improved. The air volume increases by 27% at the rated speed, the static pressure increases by 57%, the power consumption decreases by 22% and the noise decreases by 3 dB (A) Experiments show that the cylinder temperature dropped 8 ~ 10 ℃, the cylinder head temperature dropped 10 ~ 12 ℃, effectively reducing the thermal load on the diesel engine.