摘要
为建立蓖麻籽直筒式压榨侧向压力系数的理论公式,以便于合理地确定直筒式压榨机的榨筒参数,通过进行蓖麻籽直筒式单轴压榨试验,获取蓖麻籽压榨坯密度、侧向应力和轴向应力。试验建立的压榨坯密度与轴向应力的关系曲线和金属粉体压制曲线近似,由此利用金属粉体压制公式进行数据拟合,同时利用试验数据建立了侧向压力系数与轴向应力关系曲线。理论公式计算值与试验实测值的最大相对误差为24.74%,平均误差7.56%,证明了基于压榨塑性模型推导过程建立的侧向压力系数理论模型能较好地描述蓖麻籽侧向压力系数变化。
To legitimately determine the parameters of pressing cylinder, theoretical formula of lateral pressure coefficient regarding to axial stress of castor seeds was set up through plunger type uniaxial pressing tests on castor seeds, and density of compacted residues of castor seeds, lateral stress and axial stress were obtained. The relation curve about density of compacted residues and axial stress obtained by tests was approximate to the pressing curve of metal powders. Thus we utilized the density formula in the process of pressing metal powders to fit the data, and the relation curve about lateral pressure coefficient and axial stress obtained by tests was built. The maximum relative error of theoretical and measured values was 24.74% and the average error was 7.56%, which proved that theoretical model of lateral pressure coefficient based on the process of deducing the plastic model could well describe the changes of lateral pressure coefficient of castor seeds.
出处
《中国农学通报》
2015年第17期251-254,共4页
Chinese Agricultural Science Bulletin
基金
国家自然科学基金"改性SnO2中空纤维催化裂解木本植物油制备富烃基燃料油"(31470594)
国家林业局林业公益性行业科研专项"近临界流体萃取蓖麻油关键技术研究"(201304608)
关键词
蓖麻籽
侧向压力系数
理论公式
直筒式压榨
castor seeds
lateral pressure coefficient
theoretical formula
plunger type pressing
