关键词: 水田搅浆埋茬平地机, 压茬, 平整度, 灭茬率

Abstract: In order to improve the problems of low flatness, low stubble removal rate, and high work intensity of farmers, the land leveler for mixing slurry and burying stubble in the paddy field is designed. The stubble pressing device of the paddy field stirring stubble grader is developed, and the key components are designed. The diameter of elastic teeth is 5 mm, and the number of elastic teeth is 33. The designed width of the flatland carriage is 290 mm, the length is 3 500 mm, the width of a single shovel is 100 mm, the length of a single shovel is 50 mm, and the number of flatland shovels is 19. Using the designed elastic tooth model, single factor and threefactor threelevel orthogonal tests are carried out in EDEM simulation software. The effects of elastic tooth shaft speed, elastic tooth pressing depth, and forward machine speed on flatness and stubble removal rate are studied. The single factor test results show that with the increase of the forward speed of the machine, the rotating speed of the spring teeth, and the pressing depth of the spring teeth, the stubble removal first increases and then decreases, and the flatness first decreases and then increases. The multifactor test results show that it is determined that the rotation speed of spring teeth is 320 r/min, the forward speed of machines and tools is 4 km/h, and the reduction depth of spring teeth is 12 cm as the optimal solution. By comparing field test and simulation test, the machine meets the requirements of slurry mixing and land preparation before rice transplanting. The research results can lay a foundation for the development of paddy field stirring stubble grader.

Key words: paddy field slurry burying stubble grader, stubble pressing, flatness, stubble elimination rate