Mechanical Characteristics Test of 2ZSJ-4 Flexible Disc High Speed Transplanter

According to working principle of flexible disc high speed transplanter，taking three vegetable potted seedlings of broccoli，cabbage flower and pepper as experimental objects，mechanical property test was carried out aiming at row top seedling，vertical matrix block clamping and conveying，disc straw clamping conveying，and other links.It provided design basis for jacking force of seedling jacking rod，installation spacing of longitudinal conveyor belt and installation parameters of planting disc.Bowl push-out seedling force test，flexible compression test of bowl and stem compression characteristic test were carried out by using texture analyzer.Test results showed that average jacking forces of broccoli，cabbage flower and pepper were 10.8，13.57 and 9.97 N respectively.Taking maximum value of 13.57 N as design basis，10 seedlings per row were pushed out，cylinder with jacking force of about 196 N was selected comprehensively considing influence of guide rail friction and so on.When splint spacing was 20 mm，average loss rates of potted substrate of broccoli，cabbage flower and pepper were 6.13%，6.39% and 11.82% respectively.It had little effect on growth of potted seedlings after planting.Therefore，distance between hard rubber layers of conveyor belt was determined as 20 mm.Yield strength of U segment bowl seedling stem of broccoli，cabbage flower and pepper were 0.933，0.931 and 0.928 MPa respectively.Minimum value of 0.928 MPa was selected as design basis to ensure that it could adapt to different pot seedling stems.