【作者】 孙维光；

【导师】 樊智敏；

【作者基本信息】 青岛科技大学 ， 机械设计及理论， 2007， 硕士

【摘要】 差速搅拌捏合机是一种新型搅拌机。它集粉碎、搅拌、捏合、自清理、输送等功能于一体，并能连续化生产作业，很好地解决了物料搅拌混合所面临的问题。随着搅拌捏合机朝着大功率、大容量的方向发展，其自身的固有频率也随之降低，与干扰激振力的频率趋于同一数量级，因此，搅拌捏合机的运行稳定性就成为重要问题。差速搅拌捏合机的运行稳定性、搅拌效率高低和功耗一起成为搅拌捏合机的主要考核指标。因此，差速搅拌捏合机的参数优化及动力特性分析是其设计中的一项十分重要又有相当难度的研究课题。本文对此进行了有益的研究与探索：1．根据差速搅拌捏合机的特点，借鉴双螺杆混炼机螺杆截面形成原理，结合啮合原理，研究了搅拌轴的螺棱外形运动轨迹曲线形成过程，并由此设计出合理的新型螺棱。2．为提高搅拌捏合机的搅拌性能，通过参数优化，得出搅拌轴中心距与螺棱外径关系、合理的螺棱中径螺旋角、搅拌装置长宽比以及搅拌轴螺棱的排列方式。通过搅拌轴三维动念模拟过程，验证了主搅拌轴螺棱和清洁轴螺棱之间没有发生干涉，表明搅拌轴的设计参数是合理的。3．建立了搅拌轴参数化实体模型，利用有限元法计算了差速搅拌捏合机主搅拌轴和清洁轴的临界转速，并将其结果与理论公式的计算结果进行了比较分析。4．建立了搅拌轴螺棱动态载荷谱的表达式，并针对差速搅拌捏合机搅拌轴螺棱的结构特点及其稳态响应特性，建立了求解螺棱稳态响应动应力的数学模型。建立了搅拌轴螺棱的参数化实体模型，通过对搅拌轴螺棱进行谐响应分析，得出搅拌轴螺棱的动力特性及动力响应，为进一步优化搅拌轴的结构参数提供了理论依据。5．根据差速搅拌捏合机的工作原理，分析了搅拌轴的受力载荷，并利用又有限元法对其进行强度分析，验证了设计参数的合理性。更多还原

【Abstract】 The different-speed mixer is a new type mixer.It integrates with smashing,stirring, kneading, self-cleaning and conveying functions, which can easily resolve theproblem in the high viscosity material stirring and mixing. The stabilization of running,the high or low mixing efficiency and power consumption are together chiefexamination quota of the different-speed mixer. With the developing trend ofhigh-power and large capacity, the inherent frequencies of the different-speed mixerare decrescendos, maybe reaching the same order of the interference exciting force. So,it is becoming more and more important to analyze the stability of the different-speedmixer. The three main characteristics of the different-speed mixer are determined bythe level of designing, which is relatively lower in China. The parameter optimizationand dynamic characteristic analysis of the different-speed mixer is an important anddifficult job. The main works are as follows:Firstly, according to the characteristics of the different-speed mixer, themovement pathway curve formation process of mixer shaft screw flight is analyzedand the new type screw flight is designed, which uses the principle for screw sectionformation of the double screw mixer and the relativity theory of engagement.Secondly, the relation of center distance of mixer shaft and external diameter ofscrew flight, the rational screw flight intermediate diameter angle of helix, the stirringdevice length-width ratio and array fashion of mixer shaft screw flight are got byparameter optimization to improve the stirring performance of the different-speedmixer. In the process of three-dimensional dynamic state simulating of the mixer shafts,the interference is not got between the main mixer shaft and the cleaning shaft, bywhich the design parameters of mixer shafts are rational.Thirdly, the parameterization entity models of mixer shafts are built, whosecritical speed of revolutions are computed and analyzed by using the finite method.The analysis result of the finite method is compared with the analysis result oftheoretical formula.Fourth, the dynamic state load spectrum expression of mixer shaft screw flight isbuilt and the mathematics equation of screw flight steady state response dynamic stressis built according to the design feature and steady state response characteristic of mixershaft screw flight. The parameterization entity models of mixer shaft screw flight arebuilt, which are analyzed by the harmonic response analysis of the finite method. The dynamic characteristics and dynamic response of mixer shaft screw flight are got,which provide the theory for the further design value optimization of mixer shafts.Finally, the stress load of mixer shaft is analyzed according to the operatingprinciple of different-speed mixer. The intensity of the mixer shaft is analyzed by thefinite method in order to verify the parameter’s rationality.更多还原