Resistance calculation and operational parameter optimization of an opener based on dynamic friction characteristics test of bulk materials  

作　　者：Renqiang Yang Zhengjun Guan Lihua Zhang Yuanhang Xu 

机构地区：[1]College of Engineering and Technology,Southwest University,Chongqing 400715,China [2]College of Smart Health,Chongqing Polytechnic University of Electronic Technology,Chongqing 401331,China [3]School of Mechanical and Electrical Engineering,Sichuan Agricultural University,Ya’an 625014,Sichuan,China

出　　处：《International Journal of Agricultural and Biological Engineering》2024年第6期121-130,共10页国际农业与生物工程学报(英文)

基　　金：financially supported by China Agriculture Research System(Grant No.CARS-02);Chongqing Science and Technology Bureau Agricultural High Tech Special Project(Grant No.CSTC2019ngzx0017).

摘　　要：Currently,friction characteristics obtained from empirical parameters or soil direct shear tests are widely applied in the resistance calculation and operational parameter optimization of soil tillage components.However,the operation of soiltouching components is a dynamic process,and there are few reports on the dynamic friction characteristics of soil-contacting components in agricultural tillage based on factors such as different moisture content,pressure,and relative velocity.Herein,a test device to measure the friction characteristics of compressible bulk materials was developed:the interface friction between the soil and 65Mn plate and the internal friction characteristics of soil were tested using this device,and the dynamic changes of interface friction coefficient and internal friction coefficient with moisture content,pressure,and relative velocity were obtained.Based on the dynamic friction parameters of soil,the ditching resistance model of a typical ploughshare opener was established,the ditching resistance value was predicted,and field experiments were performed under different operating speeds(0.5 m/s,0.7 m/s,and 0.9 m/s)and ditching depths(60 mm,100 mm,and 140 mm).The results indicated that the calculated values of the ditching resistance model based on the dynamic friction parameters of soil reduced the error by 15%compared with the calculated values based on the friction characteristics of the soil direct shear test,which verified the accuracy of the ditching resistance model and the validity of the parameters obtained from the test device for the friction characteristics of compressible bulk materials.In addition,the minimum ditching resistance can be obtained when the ditching speed is 0.7 m/s at the same ditching depths,which is consistent with the dynamic friction characteristics of soil.It can be found that the dynamic friction characteristics of bulk materials have basic theoretical support for the optimization of operational component structures and operational parameters.

关 键 词：bulk materials dynamic friction characteristics ditching resistance model operational parameter optimization 

分 类 号：TG1[金属学及工艺—金属学]