喷丝板挠度的建模及分析

Modeling and analysis of spinneret deflection

根据喷丝板工作的固定情况和工作载荷类型建立了喷丝板弹性变形的数学模型,得出了喷丝板挠度方程并进行了求解。结果表明:设计参数相同时,SUS 304不锈钢和钽材质喷丝板在相同压力下挠度相差不大;喷丝板的挠度与压力成正比,与厚度三次方成反比,随半径的增大而增大,随无孔区半径(r)的增大而减小;以聚丙烯腈基碳纤维原丝的纺丝为例,在喷丝板材质为SUS 304不锈钢,其半径为30 mm,厚度为2 mm的条件下,湿法纺丝时,喷丝板的r大于2 mm,可实现顺利纺丝;干喷湿纺时,r大于6 mm,可减小内圈的掉胶,顺利纺丝。

According to the fixed situation and the working load type of spinneret , the mathematical model of the elastic deform-ation of spinneret was established .The deflection equation of spinneret was also obtained and solved .The results showed that SUS 304 stainless steel and tantalum spinnerets with the same design parameters hardly showed difference in deflection under the same pressure;the deflection of the spinnerets is proportional to the pressure imposed on it , and inversely proportional to the cu-bic thickness of the plate;and the deflection increased with the increase radius and decreased with the increase of the pore free zone radius （ r ）;taking polyacrylonitrile-based carbon fiber as the example and selecting the SUS 304 stainless steel spinneret with the radius of 30 mm and thickness of 2 mm, the wet spinning process proceeded smoothly as r was above 2 mm and the dry-jet spinning process proceeded smoothly with less rubber lose of inner ring as r was above 6 mm.