固体火箭技术2025，Vol.48Issue(5)：748-756,9.DOI:10.7673/j.issn.1006-2793.2025.05.013
推进剂代料用双螺杆挤出机塑化加工过程的模拟与验证
Simulation and verification of plasticizing process of twin-screw extruder for propellant substitutes
傅陈超 1薛平 1张润 1王斌 2赵荣 2韩民园 2张帅 2韩京京2
作者信息
- 1. 北京化工大学 塑料机械及塑料工程研究所,北京 100029
- 2. 山西北方兴安化学工业有限公司,太原 030000
- 折叠
摘要
Abstract
In order to improve the safety of continuous processing of energetic materials and establish a high-precision simula-tion system,based on the typical modified double-base propellant,the formulation of the substitute(cellulose acetate butyrate∶eth-ylene-vinyl acetate copolymer∶calcium carbonate∶diethyl phthalate∶carbon black powder∶water=180∶65∶210∶40∶5∶27)was optimized by rheological property matching.Multi-scale simulation of the meshing parallel co-rotating twin-screw extrusion process was carried out by means of Polyflow and Ludovic simulation software,and key parameters were verified by experiments.The results show that the synergistic effect of process parameters and equipment structure significantly influences on processing safe-ty.The increase of screw speed(from 5 r/min to 15 r/min)and aspect ratio can lead to the increase of safety risk.Specifically,the extruder head pressure and temperature increase significantly with the increase of screw speed and aspect ratio,up to 2.77 MPa and 105.23℃,respectively.The temperature in the metering section of the extruder peaks at the small lead thread due to shear heat.The predicted maximum errors for pressure and temperature are 10.08%and 8.43%with Polyflow,and 11.01%and 4.14%with Ludovic respectively.Polyflow accurately depicts the three-dimensional flow field details,while Ludovic efficiently optimizes screw configuration with quick computational capability(single time＜1 min).The two software tools complement each other,meeting the full-chain requirements from micro-shear analysis to macro-process design.The dual-software collaborative strategy can define the safe processing window(temperature≤90℃,screw speed≤15 r/min)and provide a high-precision and high-efficiency solution for the continuous production of solid propellants.关键词
含能材料/推进剂代料/双螺杆/塑化加工/安全性Key words
energetic material/propellant substitute/twin-screw/plasticizing process/safety validation分类
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傅陈超,薛平,张润,王斌,赵荣,韩民园,张帅,韩京京..推进剂代料用双螺杆挤出机塑化加工过程的模拟与验证[J].固体火箭技术,2025,48(5):748-756,9.
