双螺杆挤出机异形内筒结构强度影响因素分析
Analysis of Factors Influencing the Structural Strength of Twin-screw Extruder Shaped Inner Cylinders
柏凯旋 1董金善 1孙项羽 1王涛1
作者信息
- 1. 南京工业大学机械与动力工程学院,江苏南京 211816
- 折叠
摘要
异形内筒的厚度δi、相交圆中心距e、相交圆直径d是影响双螺杆挤出机强度的3个主要结构参数(简称3因素),一次局部薄膜应力PL、一次局部薄膜应力+二次应力PL+Pb+Q是压力容器应力强度评定的 2 个主要应力类别.对 3 因素设定 4 个水平,进行 3 因素 4 水平正交试验,利用极差分析方法与方差分析方法处理正交试验数据.研究结果表明,因素δi、e、d对双螺杆异形内筒上危险截面处的应力PL、PL+Pb+Q均具有显著影响,对PL影响的主次排序为δi、e、d,对PL+Pb+Q影响的主次排序为δi、d、e,对PL、PL+Pb+Q影响的最佳方案均为δi(4)d(1)e(1).采用多元回归分析拟合出了异形内筒结构危险截面应力PL及PL+Pb+Q的多元回归方程,可用于双螺杆挤出机异形内筒结构应力的估算.
Abstract
The thickness of the shaped inner cylinder δi,the center distance of intersecting circles e,and the diameter of intersecting circles d are the three main structural parameters(referred to as the three factors)that affect the strength of the twin-screw extruder.The primary local film stress PL,the primary local film stress+ the secondary stress PL+Pb+Q are the two main stress categories for the stress strength evaluation of pressure vessels.4 levels for 3 factors were set,3 factors and 4 levels orthogonal experiment were carried out,and use range analysis and variance analysis of the orthogonal test data were processed.The results show that the factors δi,e and d have significant effects on the stress PL and PL+Pb+Q at the dangerous cross section on the shaped inner cylinder of twin-screw.The main order of the influence on PL is δi,e and d,and the main order of the influence on PL+Pb+Q is δi,d and e.The optimal scheme for the influence of PL,PL+Pb+Q is δi(4)d(1)e(1).The multiple regression equations of the dangerous section stress PL and PL+Pb+Q were fitted by multiple regression analysis,which could be used to estimate the stress of the special-shaped inner barrel of twin-screw extruders.
关键词
双螺杆挤出机/异形内筒/结构强度/多元回归分析Key words
twin-screw extruder/shaped inner cylinder/structural strength/multiple regression analysis引用本文复制引用
出版年
2024
NETL
NSTL
维普
万方数据