2ZSJ-4型挠性圆盘高速移栽机力学特性试验

根据挠性圆盘高速移栽机工作原理，选用西兰花、白菜花、辣椒3种蔬菜钵苗为试验对象，针对成排顶苗、垂直基质块夹持输送、圆盘茎秆夹持输送环节设计了力学特性试验，为顶苗杆顶出力、纵向输送带安装间距、栽植圆盘安装参数提供设计依据。采用质构仪分别进行钵体顶苗力试验、钵体柔性压缩试验、茎秆压缩特性试验，结果表明，西兰花、白菜花、辣椒的平均顶出力分别为10.8、13.57、9.97 N，取最大值13.57 N作为设计依据，每排顶出10棵苗，综合考虑导轨摩擦力等影响，选择顶出力约196 N的气缸规格。当夹板间距20 mm时，西兰花、白菜花、辣椒钵体基质平均损失率分别为6.13%、6.39%、11.82%，对栽后钵苗生长影响较小，确定输送带硬橡胶层间距为20 mm。西兰花、白菜花、辣椒钵苗茎秆U段的屈服强度分别为0.933、0.931、0.928 MPa，选取最小值0.928 MPa作为设计依据，以保证对不同钵苗茎秆都能适应。 

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.