Design and experiment of bed former for vegetable production
1.School of Mechanical Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2.Nanjing Institute of Agricultural Mechanization, Ministry of Agriculture, Nanjing, Jiangsu 210014, China
Abstract：To solve the problem that the existing tillage machine can′t meet the ridging requirements for vegetable field, based on the tillage agronomic requirements of leaf vegetable cultivation, a bed former was designed according to the principles of double layered cutting and secondary fine soil breaking. The overall structure and the operating principle of bed former were described respectively. Two main affecting factors on working quality of forward velocity of machine and rotary speed of PTO were evaluated by the L9(32) orthogonal test. The test results show that the bed former can integrate multiple functions of deep tillage, secondary crushing, ridge forming and ridge shaping simultaneously, which meets the overall design requirements. The selected two factors have significant impact on working quality. The variance analysis results show that the suitable operation conditions are that the forward velocity of machine is 2.5 km·h-1, and the rotary speed of PTO is 1 000 r·min-1. Under the optizized conditions, groundbreaking rate and flatness of ridge surface can reach 92.58% and 2.24 cm，respectively. Compared with classical combined ridging machine, by the proposed implement， the tilling depth is increased by 2 cm with increased groundbreaking rate by 8.87%, and the flatness of ridge surface is reduced by 2.56 cm with obviously improved ridge quality.
管春松, 王树林, 胡桧, 陈永生, 张浪. 蔬菜作畦机设计与试验[J]. 江苏大学学报（自然科学版）, 2016, 37(3): 288-295.
GUAN Chun-Song, WANG Shu-Lin, HU Gui, CHEN Yong-Sheng, ZHANG Lang. Design and experiment of bed former for vegetable production[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2016, 37(3): 288-295.
2016, Vol. 37 
