单螺杆膨化机磨损计算模型建立及分析

Establish ment and analysis of the wear-calculating model for single screw extruder

从分析磨损机理入手,确定膨化机的磨损形式主要为螺杆表面和机筒内表面的疲劳磨损,建立磨损计算数学模型,推导和确定模型中断流挤出状态时的机头最大压力、表面特性参数和真实接触压力等参数的计算公式。

In the high temperature and high pressure extrusion work after a period of timethe single screw extruder produces wear,starting from analyzing wear mechanism,determine the extrusion machine wear form mainly for screw surface and inner surface of cylinder fatigue wear,establish a mathematic model of wear,derive and determine in the wear model the calculation formula of the maximum pressure of flow cutout and extrusion,surface characteristic parameters and the real contact pressure,through example,discuss influence of each parameter to wear and production capacity,the results of analysis have definite effect to design and use of the Single screw Extruder,for extruder wear problem of twin screw and triple screw extruder to lay the foundation.