Experimenal Study On Three-dimensional Stress On Hay Baler Of The Compression Chamber

Compression is the main link of grass resources into grass products for market circulation,and the three-dimensional stress of the compression chamber is the main basis for designing hay baler.In this paper,9KG-350 hydraulic high-density baler was used as the experimental device,and the Leymus chinensis with 17%water content were used as experimental materials.The Grass slices was used as the research unit,with collecting datas through the film pressure sensor and supporting data acquisition system.The influence of the change of the cross-sectional dimension and the feeding amount of the compression chamber on the three-dimensional stress of the compression chamber was studied.By changing the cross-sectional dimension of the compression chamber and the feeding amount,the variation law of the three-dimensional stress in the compression chamber and the relationship were studied.The results show that:1)In the compression process,the three-dimensional stress of the compression chamber changes with the time index,and the size of the compression chamber and the size of the feeding amount are only affected by the size of the stress value,which has no obvious effect on the change 2)to obtain the variation law of the three-dimensional stress in the whole process of compressionThe three-dimensional stress relationship of the next compression process and the three-dimensional stress in the whole process of compression are studied,which can provide an effective theoretical basis for the structural design and production efficiency of the forage baling machine.