基于牧草压缩特性的凸轮式牧草压捆机设计

Design of Cam-type Hay Balers Based on Hay Compression Characteristics

牧草是发展畜牧业的基础,但由于其地理分布和自身松散的特性,导致牧草储运成本过高,通常需要对牧草进行压缩打捆处理。牧草压缩过程中预压缩阶段位移大压力小,致密阶段位移小压力大,压缩过程中牧草的压缩特性不断变化。为此,设计了一凸轮式牧草压捆机,利用凸轮能够实现复杂运动的特点,使牧草在压缩过程中进行变速压缩,符合压缩特性曲线的变化规律。通过Pro/E软件对整机进行干涉检测以及运动学仿真模拟,结果表明:该机构可以实现快速进行预压缩、慢速进行压紧阶段的压缩,进而提高牧草压缩效率并达到降低能耗的目的。

Hay is the foundation of animal husbandry,but due to its geographical distribution and its loose nature,the costs of storage and transportation of hay are too high,so it is necessary to be compressed.The compression characteristics of the forage during the compression process are constantly changing.In the pre-compression stage,it is normally with large displacement but with small pressure;and in the densifying phase,it is with small displacement but large pressure.In this paper,a cam-type hay baler was designed,in which the characteristics of the complex movement can be realized by using the cam mechanism.The hay is compressed in variable speed during the compression process which is matched the variation rule of the compression characteristic curve.Through the software Pro/E,the interference detection and kinematics simulation were performed for the whole machine.The results prove that the new machine can achieve rapid pre-compression,slow compaction stage of compression,and thus improve forage compression efficiency and achieve the goal of reducing energy consumption.