摘要
针对铝合金熔体除气净化方面存在的问题,对铝合金熔体旋转喷吹除气净化设备进行研究。对设备主体的各个组成部分进行了分析与设计,尤其是对旋转喷吹组件的设计,提出了在转杆内部安装一条进气管道,降低管道内部温度,有效防止喷射熔剂因高温变软堵塞喷头。对设备气路系统,重点从气路系统的进气环节和调节环节进行设计,提出利用数字组合阀原理进行间断性改变进气流量的思路,可在一定旋转速度下,增加进气流量而不引起铝合金熔体翻腾。从硬件和软件方面对设备先进控制技术方案进行了研究。硬件方面利用西门子PLC对控制系统各组成环节控制原理与方法进行研究。软件方面采用西门子S7-200系列编程软件STEP7编写了设备控制软件。同时,充分考虑设备安全可靠性,设计了手动控制和自动控制两种模式,在自动控制模式下设计紧急停止,防止紧急情况下不良后果恶化。
The degassing and purification technology of molten aluminum alloys by rotary impeller is investigated, aimed at the existent problems in the aspect of the degassing and purification technology of molten aluminum alloys. All parts of the equipment are analyzed and designed. Especially, in the design of spinning rotor, a special pipeline is fixed inside the rotate pole, in order to decrease the temperature inside the rotate pole and prevent the spray flux softening owing to the high temperature and spinning rotor jamming. In the pneumatic system of the equipment, gas-in part and adjustment part are designed respectively. The flux can be altered continually, which can increase the flux, but not cause the molten aluminum alloys surge with the same rotate speed. Advanced controlling schemes for the equipment are investigated in the view of hardware and software. In hardware, the theory and methods to use Siemens PLC for control system are analyzed and designed. In software, the control software is programmed in STEP7. At the same time, the safety and steady of the equipment are fully considered. The manual control and Auto-control model are designed, and the emergencies stop is set in Auto-control model to avoid the problems worsen in emergency.
出处
《铸造》
EI
CAS
CSCD
北大核心
2007年第7期731-734,共4页
Foundry
关键词
旋转喷吹
除气
铝合金熔体净化
PLC控制
spinning rotor
degassing
purifying of molten al alloys
PLC control
