【摘要】 在本研究前期采用超高压超临界撞击流方法制备破壁灵芝孢子的基础上,为进一步提高破壁率,利用有限元软件对灵芝孢子在超高压下的应力分布进行了分析,得到最大应力值与加载压力之间的关系。根据灵芝孢子的构造特点,将其简化为带有加强筋的双层壁容器,得到结构在超高压下的应力分布。结果显示:加载压力与最大应力值成正比;应力最大值出现在孢壁的中部;载荷承受面与孢壁间加强筋连接处应力集中,最容易受破坏;采用血球计数法统计,在加载压力300MPa,温度130℃,撞击靶距10mm及保压时间1h的工艺条件下,灵芝孢子的破壁率为88.48%。更多还原

【Abstract】 In preliminary work, we succeeded in preparing sporoderm-broken Ganoderma lucidum spores through hyper high pressure supercritical impinging streams method. In order to improve sporoderm-broken ratio, stress analysis of Ganoderma lucidum spore at hyper high pressure was studied by finite element analysis. The relation between the greatest stress and pressure was obtained. Ganoderma lucidum spore was made into a double-layer wall with retaining ribs according to its structure feature. The stress intensity distribution of the structure at hyper high pressure was obtained. The analysis shows that the greatest stress was proportion to pressure. Highest values occurred at middle position of the walls. The joint of load walls and retaining ribs was thus readily destroyed. And the result of evaluation is well consistent with that of experiment. The technology conditions were confirmed as: working pressure 300MPa, heating temperature 130℃, holding time 1h, and impinging distance 10mm. On these technology conditions, the sporoderm-broken ratio is 8848% by blood count method.更多还原