Test and parameter optimization of regaining and cleaning in multiple-pass cleaning device
1. Nanjing Institute of Agricultural Mechanization, Ministry of Agriculture and Rural Sciences, Nanjing, Jiangsu 210014, China; 2. School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, Shandong 255000, China
Abstract：To solve the problems of the cleaning load caused by multiple removal in the multi-channel cleaning device of wheat combine harvester and the decreasing of cleaning performance caused by high impurity content of the secondary double-threshing auger, through bench test, the ratio of the total mass of retreat agglutinate from the weight of grains, stalks and residual extracts was used as test index. The re-extracting parts of the multi-channel cleaning device with great influence on cleaning performance were selected with feeding amount, damper opening, fan speed, upper and lower wind deflector angles as test factors. The Box-Benhnken central combination design method was used to conduct five-factor three-level response surface test, and the Design-Expert software was used to respond to the test results for surface analysis.The effects of various factors on the test index were investigated to create relevant mathematical model. The experimental results show that the damper opening, the upper and lower wind guide angles have great influence on the ratio of total mass of grain extractives, stalks and residual extractives. Through multi-objective optimization, the best matching parameters are obtained. Under the parameters combination, the test verification results of the mass ratios of grains, stalks and residual extracts are 89.90%, 2.51% and 7.50%, respectively,which indicates that the appropriate components ratio in the secondary double-throwing auger in the multi-channel cleaning device can meet the requirements of cleaning performance.
金诚谦1，2， 李庆伦2. 多风道清选装置复脱清选试验与参数优化[J]. 江苏大学学报（自然科学版）, 2021, 42(3): 331-338.
JIN Chengqian1, 2, LI Qinglun2. Test and parameter optimization of regaining and cleaning in multiple-pass cleaning device[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2021, 42(3): 331-338.
FU M Z, GONG Y J, CHEN D J, et al. Design of re-threshing system of whole-feed rice-wheat combine harvester\[J\]. Transactions of the Chinese Society for Agricultural Machinery, 2011, 42(S1): 57-61.（in Chinese）
QIAO X M, ZHU Z S, ZHAO S J. Research on kno-cking equipment of cracked-shell duck-eggs detection based on acoustic plus signal by SCM \[J\]. Journal of Agricultural Mechanization Research, 2006(12):118-120. （in Chinese）
［4］
PANASIEWICZ M，SOBCZAK P，MAZUR J，et al.The technique and analysis of the process of separation and cleaning grain materials\[J\].Journal of Food Enginee-ring，2012，109(3):603-608.
LIU C Y, WANG S S, SHI Q X, et al.Design of peanut combine harvester cleaning system test bench\[J\]. Journal of Agricultural Mechanization Research, 2018, 40(12): 91-95.（in Chinese）
LIU Y Y, LIU H, YIN Y X, et al. Feeding assessment method for combine harvest based on power measurement\[J\]. Journal of China Agricultural University, 2017, 22 (11): 157-163. （in Chinese）
JIN C Q, GUO F Y, XU J S, et al. Optimization of working parameters of soybean combine harvester\[J\]. Transactions of the Chinese Society of Agricultural Engineering, 2019, 35(13): 10-22. （in Chinese）
LI Y M, QIAO M G, XU L Z,et al. Development and performance experiments on axial-rethreshing with axial feeding［J］. Transactions of the Chinese Society for Agricultural Machinery, 2009, 40(11): 50-54. （in Chinese）
SUN W, NA M J, FENG J, et al. Optimization of centrifugal separating-rethreshing-cleaning apparatus for stripper combine harvester \[J\]. Transactions of the Chinese Society for Agricultural Machinery, 2018, 49(7): 73-81. （in Chinese）
XU L Z, YU L J, LI Y M, et al. Numerical simulation of internal flow field in centrifugal fan with double outlet and multi-duct［J］. Transactions of the Chinese Society for Agricultural Machinery, 2014, 45(10): 78-86. （in Chinese）
2021, Vol. 42 
