变径变螺距榨螺的参数化建模与结构分析
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摘要
榨螺是榨油机的关键功能部件,也是榨油机的主要易磨损零件。传统方法设计的普通榨螺,使油料在压榨过程中容易回料、结块拥堵和形成流动死区,导致榨油机的功耗增大,油料出油率降低。变径变螺距设计的榨螺通过改变螺齿的螺距和直径尺寸的大小来改变油料粒子间的结合作用,强制进料,能克服榨料传送和压榨过程中的回料现象并起到预压作用。论文提出了变径变螺距榨螺的新设计思想,可以为变径变螺距榨螺的实验研究及后续产品开发提供理论基础和方法参考。
变径变螺距榨螺的参数化设计是整个建模过程的核心,是一种新型和实用的工程设计方法。本研究连接了尺寸驱动技术,通过改变约束尺寸可以直接带来变径变螺距榨螺的自动再生,并不断优化,提高了设计速率。
本研究中用APDL程序语言对变径变螺距榨螺的实体模型建模做了研究探索,验证了方法的通用性,可运用该结论建立等径等螺距、变径不变距、变距不变径榨螺结构实体的模型。
采用Pro/ENGINEER软件的建模功能对榨螺进行了分析,构建了普通榨螺和变径变螺距榨螺的实体三维模型,剖析建模步骤的同时,建立了变径变螺距榨螺的标准化模型库,通过对APDL建模和Pro/E环境下的人机交互式建模进行了方法比较,展示了两种方法各自的优越性。
通过对变径变螺距榨螺参数化实体模型进行静力分析、灵敏度分析、优化分析、网格划分、结构动力学模态分析和疲劳分析等结构分析,对参数化建模设计进行了后续研究,对前期建模过程中设定的各项参数进一步优化改进,达到最优化的设计目标。
本文对变径变螺距榨螺这种复杂模型的建模过程进行了探索,提出了一种更为简便可行的新设计方法,为其它复杂实体模型的设计研究提供了一条新思路。
The press screw plays a key feature role on the oil screw press, however, it is the main wear part at the same time. Ordinary press screws designed with traditional methods often lead to agglomeration and the formation of stagnant zones congestion of the press materials, resulting in increased power consumption and decreased oil yield. By changing the design of the pressing screw’s pitch and diameter, the press screw with variable diameters and variable pitches can change the oil particles bonding effect so that the press materials’returning back phenomenon will be overcome and the press materials will be pre-compressed in the process of carrying and squeezing. This paper presents a new design thought of press screw with variable diameters and variable pitches,and it can give theory basis and method reference for the experimental study and follow-up product development of the press screw with variable diameters and variable pitches.
Parametric design of the press screw with variable diameters and variable pitches is the core of the whole modeling process, it is a new and practical engineering design method. In this study, the size driving technology is connected. By changing the size constraints, automatic regenerations of the press screw with variable diameters and variable pitches will come out directly, so the design rate can be improved during the repeating optimizing process. ANSYS Parametric Design Language was used in this study on the physical model of the press screw with variable diameters and variable pitches ,meanwhile, physical model of the press screw with unchanged diameter and pitch, physical model of the press screw with variable diameters and unchanged pitch and physical model of the press screw with unchanged diameter and variable pitches were established as the explorations to verify this universal method.
Modeling function of the Pro / ENGINEER software was adopted to develop and analyze the physical 3D models of the press screw with variable diameters and variable pitches and the ordinary press screw. Standardized model library of the press screw with variable diameters and variable pitches was setup when analyzing the modeling steps. Respective superiority of the ANSYS Parametric Design Language modeling and the people/machine interactive modeling under Pro/E environment were demonstrated through comparing the modeling processes with the two modeling methods.
The most optimized design goals were achieved after the follow-up study of the static analysis, sensitivity analysis, optimization analysis, meshing, structural dynamics model analysis and fatigue analysis of the parametric solid models of the press screw with variable diameters and variable pitches. During the analysis processes above, parameters were reset time and time again to get them further optimized and improved.
In this paper, the complex modeling process of the press screw with variable diameters and variable pitches was explored, a new simple and feasible design method was proposed for the design of other similar complex solid models.
变径变螺距榨螺的参数化设计是整个建模过程的核心,是一种新型和实用的工程设计方法。本研究连接了尺寸驱动技术,通过改变约束尺寸可以直接带来变径变螺距榨螺的自动再生,并不断优化,提高了设计速率。
本研究中用APDL程序语言对变径变螺距榨螺的实体模型建模做了研究探索,验证了方法的通用性,可运用该结论建立等径等螺距、变径不变距、变距不变径榨螺结构实体的模型。
采用Pro/ENGINEER软件的建模功能对榨螺进行了分析,构建了普通榨螺和变径变螺距榨螺的实体三维模型,剖析建模步骤的同时,建立了变径变螺距榨螺的标准化模型库,通过对APDL建模和Pro/E环境下的人机交互式建模进行了方法比较,展示了两种方法各自的优越性。
通过对变径变螺距榨螺参数化实体模型进行静力分析、灵敏度分析、优化分析、网格划分、结构动力学模态分析和疲劳分析等结构分析,对参数化建模设计进行了后续研究,对前期建模过程中设定的各项参数进一步优化改进,达到最优化的设计目标。
本文对变径变螺距榨螺这种复杂模型的建模过程进行了探索,提出了一种更为简便可行的新设计方法,为其它复杂实体模型的设计研究提供了一条新思路。
The press screw plays a key feature role on the oil screw press, however, it is the main wear part at the same time. Ordinary press screws designed with traditional methods often lead to agglomeration and the formation of stagnant zones congestion of the press materials, resulting in increased power consumption and decreased oil yield. By changing the design of the pressing screw’s pitch and diameter, the press screw with variable diameters and variable pitches can change the oil particles bonding effect so that the press materials’returning back phenomenon will be overcome and the press materials will be pre-compressed in the process of carrying and squeezing. This paper presents a new design thought of press screw with variable diameters and variable pitches,and it can give theory basis and method reference for the experimental study and follow-up product development of the press screw with variable diameters and variable pitches.
Parametric design of the press screw with variable diameters and variable pitches is the core of the whole modeling process, it is a new and practical engineering design method. In this study, the size driving technology is connected. By changing the size constraints, automatic regenerations of the press screw with variable diameters and variable pitches will come out directly, so the design rate can be improved during the repeating optimizing process. ANSYS Parametric Design Language was used in this study on the physical model of the press screw with variable diameters and variable pitches ,meanwhile, physical model of the press screw with unchanged diameter and pitch, physical model of the press screw with variable diameters and unchanged pitch and physical model of the press screw with unchanged diameter and variable pitches were established as the explorations to verify this universal method.
Modeling function of the Pro / ENGINEER software was adopted to develop and analyze the physical 3D models of the press screw with variable diameters and variable pitches and the ordinary press screw. Standardized model library of the press screw with variable diameters and variable pitches was setup when analyzing the modeling steps. Respective superiority of the ANSYS Parametric Design Language modeling and the people/machine interactive modeling under Pro/E environment were demonstrated through comparing the modeling processes with the two modeling methods.
The most optimized design goals were achieved after the follow-up study of the static analysis, sensitivity analysis, optimization analysis, meshing, structural dynamics model analysis and fatigue analysis of the parametric solid models of the press screw with variable diameters and variable pitches. During the analysis processes above, parameters were reset time and time again to get them further optimized and improved.
In this paper, the complex modeling process of the press screw with variable diameters and variable pitches was explored, a new simple and feasible design method was proposed for the design of other similar complex solid models.
引文
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