摘要
通过试验分析了旋转式微喷头的转速对水力性能的影响，试验处理设置为：3种喷嘴直径，分别为Ф1．4mm、Ф1．8mm和Ф2．4mm；5种阻尼脂量，分别为无阻尼、1／6阻尼脂、1／3阻尼脂、2／3阻尼脂和全阻尼。结果表明，利用阻尼脂可以显著降低微喷头的转速，在100～250kPa工作压力下，微喷头的转速可以从无阻尼时的2230-4225r／min降到全阻尼时的0．1～1．1r／min。与无阻尼的高速旋转微喷头比较，低转速微喷头可以显著增加射程，在100-250kPa工作压力时，其射程增加20．5％～31．8％。而在低转速区，微喷头的射程变化不大，在200kPa工作压力下，直径彩1．8mm喷嘴微喷头转速从0．41r／min增加到6．1r／min时，射程仅降低4．4％。与无阻尼的高转速微喷头比较，低转速微喷头水量分布更趋近于三角形分布。
An experimental Study was conducted to asses the effect of rotation speed on hydraulic performance of rotating micro-sprinklers. The results indicate that the damping grease can notably decrease the rotation speed, under 100-250 kPa pressure, the micro-sprinkler rotation speed decreases from 2230-4225 r/min without damping grease to 0.1-1.1 r/min with all the damping grease; comparing with high rotating speed, the throw distance of Ф 1. 8 mm nozzle micro-sprinkler in low rotation speed increases by 20.5%-31.8% under 100-250 kPa pressure, while during the low rotation speed zone, the throw distance change vary little, At 200 kPa pressure, when the rotation speed of Ф1. 8 mm nozzle micro-sprinklers increases from 0.41 r/min to 6.1 r/min, the throw distance decreases only by 4.4% The distribution rate curve of slow-rotating micro-sprinklers is more like triangle than that of high rotating ones.
出处
《灌溉排水学报》
CSCD
北大核心
2006年第4期64-67,共4页
Journal of Irrigation and Drainage
关键词
旋转式微喷头
阻尼脂
射程
水量分布
rotating micro-sprinkler
damping grease
throw distance
water distribution
