Design and Test of the Structure of Extractor Negative Pressure Zone of Sugarcane Chopper Harvester

Given the problems of high trash content and loss rate for mechanized sugarcane harvesting, taking HN4GDL-194 chopper harvester extractor developed by South China Agricultural University as research object, three types negative pressure structures were designed internal flow field simulation analysis was conducted. Simulation results showed that aerodynamic performance in area structure two is best wind velocity are largest. The measurement velocity, pressure, changing trend actual value basically consistent with value. relative error between air outlet less than 10% under different speeds, indicating has accuracy. Field tests original optimal test when feeding 1.5 kg/s, there no significant difference various fan speeds. When increased to 7.5 kg/s speed low (950 r/min) medium (1100 r/min), significantly lower extractor, decreasing 2.5% 1.63%, respectively. (1250 extractor. 1100 r/min 1.5, 4.5, compared decreased 0.53%, 0.21%, 0.19%,