蓖麻籽不同状态不同压榨方式下压缩比与轴向应力关系的研究  

Researchs of the relationship between compression ration and axial stress of castor seeds of different states in different squeeze ways

作　　者：黄志辉[1] 许方雷[1] 李昌珠[2] 刘汝宽[2] 

机构地区：[1]中南大学机电工程学院,湖南长沙410083 [2]湖南省林业科学院,湖南长沙410004

出　　处：《华南农业大学学报》2015年第1期101-105,共5页Journal of South China Agricultural University

基　　金：国家林业局林业公益性行业科研专项(201304608);国家科技支撑计划(2011BAD22B04)

摘　　要：【目的】研究蓖麻籽在不同状态不同压榨方式下压缩比-轴向应力关系.【方法】进行了完整蓖麻籽与碾碎后的蓖麻籽在不同的压榨方式、不同的压榨速率下的冷榨试验;采用川北方程建立了双曲线型压缩比-轴向应力关系模型,并依据试验结果,应用最小二乘法求得该模型的待定参数.【结果和结论】蓖麻籽碾碎后压榨在相同的条件下所达到的等价压缩比和完整籽基本一致,但实际压缩比比完整籽小得多;多次压榨在相同的条件下比单次压榨可以达到更大的压缩比;模拟值与实测值的对比和误差分析表明,模拟值与实测值比较吻合.【Objective】To study the relationship of compression ratio between axial stress and castor seeds in different states with different squeeze methods. 【Method】Cold pressing tests of complete and crushed castor seeds were accomplished in different squeeze ways with different squeeze rates. Hyperbolic compression relationship model between ratio and stress was developed on the basis of the Kawakita＇s equations. The parameters of the model were determined by the least square method according to the tested results.【Result and conclusion】The results showed that crushed castor seeds achieved an equivalent compression ratio consistent with complete ones,while the actual compression ratio was much smaller than that of the complete seeds. Pressing repeatedly under the same conditions can achieve a greater compression ratio than that of a single press. Simulated values and measured values matched well by comparison of values and their error analysis.

关 键 词：蓖麻籽 压榨方式 压缩比 轴向应力 

分 类 号：TH-39[机械工程]