【凹形铲刀逆转切抛土理论及其应用的研究】马旭.pdf

Classified Index:SUDC:631 Ph.D.Dissertation STUDYONREVERSE-ROTATIONALCUTTINGAND THROWINGSOILTHEORYANDAPPLICATIONSOF BLADEWITHSCOOPSURFACE Ma Xu Supervisor:Prof.Ma Chenglin JilinUniversity of Technology No,Renmin Street,Changchun AcademicDegreeAppliedfor:DoctorofEngineering Specialit

摘要摘要在盐业生产中,盐田铺膜是一项有效的防渗措施,可增加海盐产量20 ～ 50 .在农业生产中,逆转旋耕是一种新兴的田间耕作方式,当耕深大于刀辊半径时,逆转旋耕较正转旋耕切土阻力减小,功耗小,深耕稳定性好,碎土能力强,沟底不平度小:所以在盐田铺膜防渗作业和农田土壤耕作中都急需采用功耗低、作业质量高的机械化机具。本文主要研究凹形铲刀逆转切抛土理论,为盐田铺膜机选择优良的切抛土部件,代替人工铺膜.同时解决目前逆转深耕旋耕机作业中切抛土部件后抛土性能差、对已耕土壤重耕,影响覆盖性能、并使功耗增加等问题。

ABSTRACT ABSTRACT Salinefilmingis an effectiveway toprevent brine fromleaking and it can increaseoutputofsaltby20.50percentinseasaltproduction.Reverse-rotational rotary tillageis a developingtype of farmlandtillageproduction in agriculture.