气压深松土体内空气含量变化规律试验研究  

Experimental Study on Variation Law of Air Content in Air Pressure Subsoiling Soil

作　　者：左胜甲 孔德刚[2] 冯心茹 李继成 Zuo Shengjia;Kong Degang;Feng Xinru;Li Jicheng(School of Physics,Tonghua Normal University,Tonghua 134001,China;College of Engineering,Northeast Agri-cultural University,Harbin 150030,China)

机构地区：[1]通化师范学院物理学院,吉林通化134001 [2]东北农业大学工程学院,哈尔滨150030

出　　处：《农机化研究》2024年第1期202-206,215,共6页Journal of Agricultural Mechanization Research

基　　金：吉林省教育厅“十三五”科学技术研究项目(20191096KJ);通化师范学院校级科研基金项目(201844)。

摘　　要：为探寻气压深松对土体内空气含量的影响,建立了室内模拟耕层结构,以深松后土体内空气增量为分析指标,进行了气压深松室内模拟试验。结果表明:在深松气压1.4、1.8、2.2MPa的作用下,土表形成最大半径为0.45m的球冠体,土体内空气含量增量明显,随距注气点距离的增加土体内气体增量逐渐减小;在3种深松气压的作用下,土体内空气最大增量为1.23、2.61、3.89m3,深松气压的变化对土壤内空气增量影响明显但并非正相关,可见气压深松是气固耦合作用的结果。试验结果可为气压深松机理深入研究及气压深松装备的研发提供参考依据。In order to explore the influence of air pressure subsoiling on the air content in soil,an indoor simulated plough layer structure was established.Taking the air increment in soil after subsoiling as the analysis index,the indoor simulation test of air pressure subsoiling was carried out.The results show that under the action of subsoiling pressure of 1.4,1.8 and 2.2MPa,a spherical crown with a maximum radius of 0.45m is formed on the soil surface,the increment of air content in the soil is obvious,and the gas increment in the soil gradually decreases with the increase of the distance from the gas injection point.Under the action of three subsoiling pressures,the maximum increment of air in the soil is 1.23,2.61 and 3.89m3.The change of subsoiling pressure has an obvious but not positive correlation on the increment of air in the soil.It can be seen that pneumatic subsoiling is the result of gas-solid coupling.The test results can provide a reference basis for the in-depth study of pneumatic subsoiling mechanism and the research and development of pneumatic subsoiling equipment.

关 键 词：气压深松 深松气压 空气含量 变化规律 

分 类 号：S222.19[农业科学—农业机械化工程]