三螺杆挤压机熔体输送段功耗特性的数值分

利用CFD技术,采用三维流-热耦合模型对三螺杆挤压机流场、温度场、压力场和粘性生热分布进行了研究.在此基础上,考虑熔体粘性耗散生热和压力升高的影响,研究了螺杆转速、螺纹头数、压力差和挤出量等参数对三螺杆挤压机挤出功耗和比能产量的影响,并和常规双螺杆挤压机进行了对比分析.结果表明,随着螺杆转速、流道两端压力差和挤出量的增加,三螺杆挤压机的挤出功耗逐渐增加,而比能产量却逐渐减小.随着螺杆螺纹头数的增加,三螺杆挤压机的功耗和比能产量均逐渐增加.通过对比发现,三螺杆挤压机比能产量较双螺杆挤压机提高了30%.

Simulation of Power Consumption Characteristics in Conveying Element in Triple Screw Extruder

The flow,temperature,pressure fields and viscous heating distribution in a triple screw extruder were studied by using computational fluid dynamics(CFD) method.The effects of screw rotational speeds,numbers of screw thread,pressure difference and flow rate on productivity ratio and power consumption were employed with considering temperature by pressure build-up and viscous dissipation.At the same time,the characteristics of power consumption of triple screw extruder were compared with those of traditional ...