4LZ-1.0Q型稻麦联合收获机脱粒清选部件试验与优化

摘要

Orthogonal experiment of threshing and cleaning parts of 4LZ - 1. OQ cereal combine harvester was designed. Wheat field experiments with fuzzy analysis of synthesize evaluation were analyzed. The optimized group of parameters in roller, concave board screen, cover plate, vibration sieve and centrifugal blower was got. Test results indicated the sequences of factors influencing the threshing performance were roller linear velocity, separating interval, guide number of cover plate, mesh size and screening area of concave board screen and threshing interval. The values were 25 m/s, 55 mm, 4, 204°, 36 mm x 15 mm and 15 mm, respectively. The sequences of factors influencing the cleaning performance were vibration sieve crank rotating speed, vibration sieve type, centrifugal blower rotating and amplitude of vibration sieve. The values were 404 r/min, 16 mm, 1 787 r/min and 30 mm. Thus, the impurity rate was less than 3% , the broken rate was less than 1% and the loss rate was less than 1.5%.%对4LZ -1.0Q型稻麦联合收获机脱粒清选部件进行了正交试验,采用模糊综合评价法对小麦田间试验结果进行分析,得出脱粒清选环节中钉齿脱粒滚筒、栅条凹板筛、上盖板、振动筛、离心风机部件的优化组合参数.试验结果表明,影响脱粒性能的因素主次顺序为:滚筒齿顶线速度、脱离间隙、上盖板导向次数、凹板筛筛分包角、凹板筛筛孔大小和脱粒间隙,优选参数组合为滚筒齿顶线速度25 m/s、脱离间隙55 mm、上盖板导向4次、凹板筛筛分包角204°、凹板筛筛孔尺寸36 mm×15 mm、脱粒间隙15 mm;影响清选性能的因素主次顺序为:振动筛曲柄转速、筛面结构形式、离心风机转速、振动筛振幅,优选参数组合为振动筛曲柄转速404 r/min、筛面16 mm方孔编织筛、离心风机转速1787 r/min、振动筛振幅30 mm.可控制含杂率小于3％、破碎率小于1％、脱粒清选籽粒损失率小于1.5％.