摘要
为解决甘薯秧回收机抛送功耗高的问题,同时提高抛送装置抛送性能及甘薯秧回收率,对回收机抛送装置的风机结构及工作参数进行优化设计。分析抛送装置甘薯秧动力学特性及功耗影响因素,应用CFDDEM气固耦合法对抛送装置的输送过程进行数值模拟,揭示回收机内气流速度场分布和碎甘薯秧运动规律。以抛送装置比功耗、甘薯秧回收率、抛送速度为试验目标,风机转速、叶片数、叶片倾角为试验因素进行三因素三水平中心组合仿真优化试验并进行试验验证。优化试验结果表明:当风机转速为880 r/min、叶片数为3、叶片倾角为7°时,抛送装置比功耗、甘薯秧回收率及抛送速度分别为718 m^(2)/s^(2)、92.79%、5.96 m/s。对比试验表明抛送装置优化改进后比功耗降低15.83%,甘薯秧回收率提高1.75%,抛送速度提高5.49%。
Sweet potato seedling recycling machine can realize sweet potato seedling recycling for feeding,avoid the waste of resources.Throwing device is an important component of sweet potato seedling recycling machine.However,throwing sweet potato seedlings has high power consumption.The dynamic analysis of sweet potato seedling in the throwing device shows that the fan blade backward tilt is more conducive to throwing than forward tilt.The power consumption analysis of the throwing device shows that when the structural parameters of the fan are fixed,the specific power consumption is high as the speed is increased.The gas-solid coupling method was applied to simulate the conveying process of the throwing device.It was found that as the speed increased,the average flow velocity in the recovery machine was gradually increased.The blade number and blade inclination had a great influence on the performance of the throwing device.Then the fan speed,blade number and blade inclination angle were taken as the experiment factors,and the specific power consumption,recovery rate and throwing speed were taken as the experiment indexes,the center combination experiment with three factors and three levels was carried out.The results showed that the influence of factors on the specific power consumption from large to small were fan speed,blade inclination,blade number;the influence of factors on the recovery from large to small were fan speed,blade number and blade inclination;the influence of factors on the throwing speed from large to small were fan speed,blade number and blade inclination;when fan speed was 880 r/min,blade number was 3 and blade inclination angle was 7°,the specific power consumption of throwing device was 718 m^(2)/s^(2),and sweet potato seedling recovery rate was 92.79%,the throwing speed was 5.96 m/s.Comparative experiments showed that after the optimization and improvement of the throwing device,the specific power consumption was reduced by 15.83%,the recovery rate of sweet potato seedlings was increased by 1.
作者
穆桂脂
吕皓玉
张婷婷
郑文秀
张万枝
吕钊钦
MU Guizhi;LÜHaoyu;ZHANG Tingting;ZHENG Wenxiu;ZHANG Wanzhi;LÜZhaoqin(College of Mechanical and Electrical Engineering,Shandong Agricultural University,Taian 271018,China;Shandong Provincial Key Laboratory of Horticultural Machineries and Equipments,Taian 271018,China)
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2021年第10期213-222,共10页
Transactions of the Chinese Society for Agricultural Machinery
基金
山东省农业良种工程项目(2020LZGC004051)
山东省农机装备研发创新计划项目(2017YF002)
山东省现代农业产业技术体系薯类创新团队农业机械岗位专家项目(SDAIT1610)
山东省园艺机械与装备重点实验室项目(YYJX201907)。
关键词
甘薯秧回收机
抛送装置
气固耦合
比功耗
sweet potato seedling recycling machine
throwing device
gassolid coupling
specific power consumption
