9Z-6A型盘刀式铡草机切碎器改进设计与性能试验

Experimental Study on the Performance of 9Z-6A Disc-knife Chaff Cutter after Improved

针对青饲料切碎机存在的生产率低、能耗大的问题,以9Z-6A型盘刀式青饲料切碎机为对象,对其切碎器进行了改进设计和性能试验研究。在原机喂入口增加一把定刀,使切碎器处于双定刀切割工况。改进前后切碎器切割性能对比试验表明:额定工况下,玉米秸秆含水率为9.74%时,双定刀比单定刀的切割质量得到明显改善,功耗降低21.8%,度电产量提高了6.72%,生产率提高了4.38%;同时,获得了双定刀工作时切割速度对切碎器性能的影响规律,得到了切割性能最佳时的切割速度。

As one of the agriculture-livestock feed processing machinery, the hay cutter could cut the green （dry） corn stalks, it was widely applied into forage processing.9Z-6A disc-knife type of chaff cutter was improved in order to solve the problems of the poor quality of forage processing, low productivity and energy consumption in this paper.Another fixed knife was installed at the middle feed inlet of original machine, so its chopper had two fixed knifes.A torque sensor device was designed to test the cutting performance parameters such as torque and power under the rated conditions.The test results showed that the cutting quality of dual fixed knife had been significantly improved over the single fixed knife, power was reduced by 21.8%, electricity production was increased by 6.72%, and the productivity has improved by 4.38% when the water content of the corn straw was 9.74%.The influence law of dual fixed knife’s cutting speed on the chopper work performance had also been studied.The cutting speed was found while the best performance of the chopper chaff could be achieved.