锥形联接结构密封性能的研究与改进设计
发布时间:2019-05-17 20:04
【摘要】:锥形联接结构主要用于高压介质的密封,其密封原理是利用金属的塑性变形,在密封接触面形成封闭的密封环。虽然锥形联接结构在工程实际中应用广泛,但是对于结构参数的设计主要是依靠经验,没有行之有效的分析方法和可靠的设计理论来指导实际工程应用。 参数设计的不合理性和零件形位误差的不确定性给密封带来了困难,为了解决锥形联接结构的密封性问题,本文采用数值模拟方法,对锥形联接结构的密封性能进行了深入的研究。针对制动管路锥形联接结构密封失效的问题进行了改进设计,研究成果对类似的密封结构设计具有一定的实际指导意义,也能为我国的汽车自主研发和创新设计作出贡献。 本文的主要工作及成果如下: (1)运用有限元软件ANSYS对锥形联接结构的密封性能进行了数值分析,得到了喇叭口内锥角、喇叭口厚度、喇叭口圆角半径、凸台外径与密封面接触压力和喇叭口等效应力的关系曲线,并确定满足密封时,上述各因素的合理取值范围。 (2)对喇叭口存在同轴度误差和轮廓度误差的情况进行模拟分析,确定了同轴度、轮廓度误差与密封面接触压力和等效应力的关系,基于密封原理,确定了不同扭矩下,所允许的同轴度和轮廓度公差范围。 (3)通过中心复合试验设计,建立了结构参数与密封性能指标的数学模型,并运用多目标函数优化方法,结合matlab搜索工具进行求解分析,确定了密封性能达到最优时,各结构参数的取值,从而实现对锥形联接结构的改进设计。
[Abstract]:Conical connection structure is mainly used for sealing of high pressure medium. Its sealing principle is to form a closed sealing ring on the sealing contact surface by using the plastic deformation of metal. Although conical connection structure is widely used in engineering practice, the design of structural parameters mainly depends on experience, and there is no effective analysis method and reliable design theory to guide the practical engineering application. The irrationality of parameter design and the uncertainty of part shape and position error bring difficulties to seal. In order to solve the sealing problem of conical connection structure, numerical simulation method is used in this paper. The sealing performance of conical connection structure is deeply studied. Aiming at the problem of sealing failure of conical connection structure of brake pipeline, the research results have certain practical guiding significance for similar seal structure design, and can also contribute to the independent research and development and innovative design of automobile in our country. The main work and achievements of this paper are as follows: (1) the sealing performance of conical connection structure is analyzed by using finite element software ANSYS, and the cone angle, horn thickness and fillet radius of horn mouth are obtained. The relationship curve between the outer diameter of the raised platform and the contact pressure of the sealing surface and the equivalent stress of the horn mouth is determined, and the reasonable range of the above factors is determined when the sealing is satisfied. (2) the coaxiality error and profile error of horn mouth are simulated and analyzed, and the relationship between coaxiality, profile error and contact pressure and equivalent stress of sealing surface is determined. based on sealing principle, the relationship between coaxiality and profile error and contact pressure and equivalent stress of sealing surface is determined. The allowable tolerance range of coaxiality and profile. (3) through the central composite test design, the mathematical model of structural parameters and sealing performance index is established, and the multi-objective function optimization method and matlab search tool are used to solve and analyze, and it is determined that the sealing performance reaches the optimal. The values of each structural parameter are used to realize the improved design of conical connection structure.
【学位授予单位】:武汉理工大学
【学位级别】:硕士
【学位授予年份】:2012
【分类号】:TH136
本文编号:2479370
[Abstract]:Conical connection structure is mainly used for sealing of high pressure medium. Its sealing principle is to form a closed sealing ring on the sealing contact surface by using the plastic deformation of metal. Although conical connection structure is widely used in engineering practice, the design of structural parameters mainly depends on experience, and there is no effective analysis method and reliable design theory to guide the practical engineering application. The irrationality of parameter design and the uncertainty of part shape and position error bring difficulties to seal. In order to solve the sealing problem of conical connection structure, numerical simulation method is used in this paper. The sealing performance of conical connection structure is deeply studied. Aiming at the problem of sealing failure of conical connection structure of brake pipeline, the research results have certain practical guiding significance for similar seal structure design, and can also contribute to the independent research and development and innovative design of automobile in our country. The main work and achievements of this paper are as follows: (1) the sealing performance of conical connection structure is analyzed by using finite element software ANSYS, and the cone angle, horn thickness and fillet radius of horn mouth are obtained. The relationship curve between the outer diameter of the raised platform and the contact pressure of the sealing surface and the equivalent stress of the horn mouth is determined, and the reasonable range of the above factors is determined when the sealing is satisfied. (2) the coaxiality error and profile error of horn mouth are simulated and analyzed, and the relationship between coaxiality, profile error and contact pressure and equivalent stress of sealing surface is determined. based on sealing principle, the relationship between coaxiality and profile error and contact pressure and equivalent stress of sealing surface is determined. The allowable tolerance range of coaxiality and profile. (3) through the central composite test design, the mathematical model of structural parameters and sealing performance index is established, and the multi-objective function optimization method and matlab search tool are used to solve and analyze, and it is determined that the sealing performance reaches the optimal. The values of each structural parameter are used to realize the improved design of conical connection structure.
【学位授予单位】:武汉理工大学
【学位级别】:硕士
【学位授予年份】:2012
【分类号】:TH136
【参考文献】
相关期刊论文 前10条
1 王小刚;张方晓;黄鹏;;基于ANSYS的管路锥形密封结构参数分析[J];兵工自动化;2009年08期
2 陈立周,于晓红,翁海珊;基于随机优化的工程稳健设计[J];北京科技大学学报;1999年01期
3 孟庆国;基于三次设计和模糊理论的机械稳健设计[J];机械设计与制造;2000年04期
4 张宝忠;锥面接触机械密封的泄漏量计算[J];机械工程师;2003年02期
5 ;双锥密封的初步试验与研究[J];化工与通用机械;1975年01期
6 ;双锥密封工作性能讨论[J];化工与通用机械;1976年09期
7 吕理荣;胥文华;胡天然;刘志杰;;双锥密封摩擦角的测试与分析[J];化工与通用机械;1980年06期
8 武怀锦,郭百泽,丁英仁;阀门锥面密封锥角选择的理论探讨[J];流体工程;1992年09期
9 王兆俊,相安宁;锥面密封管接头[J];起重运输机械;1991年09期
10 冯秀,顾伯勤;金属垫片密封研究进展[J];润滑与密封;2004年01期
相关硕士学位论文 前1条
1 高永建;大型高压容器双锥密封结构设计方法研究[D];浙江大学;2008年
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