水稻穗头连接力的试验与分析

针对水稻联合收割机在收获过程中存在的带柄问题,在WDW 30005型微控电子万能试验机上利用专用夹具对水稻穗头籽粒与粒柄、粒柄与枝梗、枝梗与主茎秆之间的连接力进行了测定.试验结果表明,不同类型的水稻品种、不同部位、不同含水率、不同受力方向等对连接力都有明显影响.运用DPS数据处理系统,建立了含水率与连接力之间的非线性回归模型.分析表明:进行机械脱粒时,糯稻比其他品种的带柄率高,而同一品种的水稻含水率低时带柄率也较低;沿轴线方向的连接力较大,逆轴线方向的连接力较小.

Test and analysis on connection force of rice spike

To solve the problem of having petioles in the threshing of rice combine harvester,experimental studies are conducted on connection forces between grain and petiole,petiole and branch,and branch and caulis,with expert clamp on the electric and subminiature omnipotent equipment of WDW30005.The effects of breed,position,moisture content and the force of direction on the connection forces are analyzed.The nonlinear regressive equation between moisture content and connecting force is established based on the test results using DPS.The results show that the sticky rice have more petioles in threshing for the same moisture content and have low petioles in lower moisture content of the same breed.The connecting force is higher following the axial direction and lower on the opposite direction.