Abstract： To solve the problems of high pickup loss rate, large amount of soil and large straw size in the straw bales operation of traditional pickup device, a hammertype picking and smashing device was designed with picking, crushing and filtering functions. Through the theoretical analysis, the relevant parameters of device were designed, and the main factors on operation effect and value range were obtained. The modal analysis of device was conducted by AnsysWorkbench to determine the stability of device operation. To investigate the performance of pickup and smash device, pickup roller speed, height of feed inlet from ground and working speed were considered as experimental factors, and pickup loss rate and thesmash length pass rate were used as experimental indexes. The orthogonal test L9 (34) was conducted to obtain the test factors affecting the performance of pickup and smash device work. The verification test was carried out with the optimal level combination. The results show that the decreasing sequence of various affecting factors is pickup roller speed, ground height and working speed. Under the optimal conditions with pickup roller speed of 2 200 r·min-1, ground height of 175 mm and working speed of 4 km·h-1, the pickup loss rate is 0.34％ with smash length pass rate of 98.10％.
2019, Vol. 40 
