摘要
针对已有螺杆型线方程参数化建模过程复杂、时间长的问题。根据型线的设计原则与要求,利用坐标系转换,构建了一种易于参数化建模且密封性、啮合性好的欧姆(Ω)形对称型端面型线方程,方程的滚圆相对于节圆的公转角t,根据螺杆传动几何关系推导并界定范围;以Visual Basic程序设计语言为开发工具,三维软件Solid Works为二次开发平台,实现了螺旋套的参数化实体建模;建立了螺杆的固有特性分析模型,用ANSYS软件对螺杆的轴承处进行了刚性与弹性约束下的模态分析,并考虑了不同的弹性单元刚度对固有频率的影响。结果表明:弹性约束下螺杆的固有频率明显降低,2种约束下的振型一致,弹性单元的刚度对弹性约束下的固有频率没有影响。文中研究为双螺杆泵型线改进设计及螺杆模态分析提供理论依据,大大提高设计效率。
For the existing screw type line equation,parametric modeling complex,long-time problems,according to the design principles and requirements of profiles,by using of coordinate transformation,Ω-shaped symmetrical end face profile equations with easy-parametric modeling and good sealing,engagement properties were built.With respect to the pitch circle,rounded corners public t of the equations were deduced and defined ranges based on geometric relationships of screw driving;Visual Basic program language for the development tools,three-dimensional software Solid Works for secondary development platform,achieved a parametric solid modeling of screw spiral sets;established the inherent characteristics of the screw analysis model,with ANSYS software did modal analysis of the bearing on screw under the constraints of rigidity and flexibility and considered the effects of different elastic stiffness of the natural frequency.The results show that：the natural frequency of the screw under elastic constraints is decreased obviously,the modes under two constraints are consistent,stiffness of the elastic element has no effect on the natural frequency of the elastic constraints.The research provided the theoretical basis for the improvement design of the double screw pump and the screw mode analysis,and greatly improved the design efficiency.
出处
《轻工机械》
CAS
2015年第6期1-5,13,共6页
Light Industry Machinery
基金
国家自然科学基金(61175125)
浙江省自然科学发展基金(LZ15E050003)
浙江省教育厅资助项目(Y201329351)
浙江农林大学发展基金(2012FR027)
浙江省高校发展基金(FX2013061)
关键词
双螺杆泵
螺旋套
摆线
型线
参数化建模
模态
twin screw pump
helical units
cycloid
profile line
parametric modeling
modal
