气压劈裂式深松铲的土壤劈裂减阻机理及有限元分析

针对我国现有土壤深松机械存在深松阻力大、深松幅度小等问题,研制了一种工作阻力小、深松效率高的气压劈裂式深松铲。首先建立了土壤与铲面在有无气压劈裂的工况下的力学模型,并进行对比分析,研究气压劈裂减阻机理,推导出在气压劈裂下的牵引阻力计算公式;然后,为验证设计的可靠性,对深松铲整体结构进行静力学分析与动力学分析。结果表明:气压劈裂式深松铲能够有效减小深松阻力,深松铲的最大应力远小于所选材料的屈服应力,且固有频率可明显避开与机身结构的共振频率。

Air Pressure Split and Deep Loosening Shovel of Soil Fracturing Mechanism of Drag Reduction and Finite Element Analysis

In view of the existence of the soil deep loose machinery in our country, deeping pine resistance is large,and the depth of the deep loose is small,so there is a kind of pressure splitting shovel with high efficiency and low resistance developed.First,the soil and the shovel face are established in the mechanical model under the condition of pressure splitting,and make a comparative analysis.By studying the mechanism of pressure splitting and reduction,the calculation formula of traction resistance under pressure splitting is deduced;Further, to verify the reliability of analysis and design, static analysis and dynamic analysis are carried out on the overall structure of deep loose shovel.And it turns out that,pressure splitting type deep loose shovel can effectively reduce deep loose resistance,the maximum stress of the pressure splitting deep loose shovel is much less than the yield stress of the selected material and natural frequency avoids resonant frequency greatly.