波纹管机械密封接触分析及流场数值模拟
发布时间：2019-02-24 15:06
【摘要】：对于大轴径机械密封装置,机械密封的重要零部件动、静环端面在高压、高速和高温载荷条件下严重影响密封装置的密封性能。本文基于ANSYS软件,结合国内外在机械密封性能理论上的新的研究成果,从结构静态和流体稳态两个角度建立了计算机械密封性能的有限元模型,并对密封环的轴向变形、应力,流体的速度场和压力场做了分析研究。 首先本文对结构静态分析中,以变形为切入点,分析了单独分析方法的不足,将机械密封模型简化成轴对称,利用整体接触方法,保证了受力与变形的协调。分析结果表明,机械密封端面在介质压力,弹簧力作用下密封端面出现楔形变形,然而增加了扭矩的整体接触分析表明了,动静环的的外径出的接触力较大。总的可以看出整体接触分析的有效地说明了接触端面中肯定会出现收敛和发散的楔形变形。 减少泄漏量是机械密封的最重要的目的之一,因此计算研究机械密封端面间隙之间的流体性能是具有现实意义的。本文主要基于CFX11.0流体分析软件建立间隙流体的有限元模型,给出密封间隙流体的相关边界条件,得到了压力,速度和网格位移,说明机械密封端面之间的流场流动特性。为防泄漏问题提供了理论依据,为保证机械密封一更长工作寿命长期有效地运行方面,具有现实意义。
[Abstract]:For the large diameter mechanical sealing device, the sealing performance of the sealing device is seriously affected by the moving and static ring end face under the condition of high pressure, high speed and high temperature load. In this paper, based on ANSYS software, combined with the new research results of mechanical seal performance theory at home and abroad, a finite element model for calculating mechanical seal performance is established from two angles of structural static state and fluid steady state, and the axial deformation and stress of seal ring are analyzed. The velocity field and pressure field of the fluid are studied. Firstly, in the static analysis of the structure, taking deformation as the breakthrough point, the deficiency of the single analysis method is analyzed. The mechanical seal model is simplified into axisymmetric and the overall contact method is used to ensure the coordination between the force and the deformation. The results show that the end face of mechanical seal appears wedge deformation under the action of medium pressure and spring force. However, the overall contact analysis with increased torque shows that the contact force of the outer diameter of the static and static ring is larger. It can be seen that the integral contact analysis can effectively explain the convergence and divergence of wedge-shaped deformation in the contact face. Reducing leakage is one of the most important purposes of mechanical seal, so it is of practical significance to calculate and study the fluid performance between the end clearance of mechanical seal. In this paper, the finite element model of clearance fluid is established based on CFX11.0 fluid analysis software, and the relevant boundary conditions of seal clearance fluid are given. The pressure, velocity and grid displacement are obtained, and the flow field characteristics between the end surfaces of mechanical seal are explained. It provides a theoretical basis for the problem of preventing leakage and has practical significance in ensuring the long working life of mechanical seal and running effectively for a long time.
【学位授予单位】：新疆大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH136
本文编号：2429656
[Abstract]:For the large diameter mechanical sealing device, the sealing performance of the sealing device is seriously affected by the moving and static ring end face under the condition of high pressure, high speed and high temperature load. In this paper, based on ANSYS software, combined with the new research results of mechanical seal performance theory at home and abroad, a finite element model for calculating mechanical seal performance is established from two angles of structural static state and fluid steady state, and the axial deformation and stress of seal ring are analyzed. The velocity field and pressure field of the fluid are studied. Firstly, in the static analysis of the structure, taking deformation as the breakthrough point, the deficiency of the single analysis method is analyzed. The mechanical seal model is simplified into axisymmetric and the overall contact method is used to ensure the coordination between the force and the deformation. The results show that the end face of mechanical seal appears wedge deformation under the action of medium pressure and spring force. However, the overall contact analysis with increased torque shows that the contact force of the outer diameter of the static and static ring is larger. It can be seen that the integral contact analysis can effectively explain the convergence and divergence of wedge-shaped deformation in the contact face. Reducing leakage is one of the most important purposes of mechanical seal, so it is of practical significance to calculate and study the fluid performance between the end clearance of mechanical seal. In this paper, the finite element model of clearance fluid is established based on CFX11.0 fluid analysis software, and the relevant boundary conditions of seal clearance fluid are given. The pressure, velocity and grid displacement are obtained, and the flow field characteristics between the end surfaces of mechanical seal are explained. It provides a theoretical basis for the problem of preventing leakage and has practical significance in ensuring the long working life of mechanical seal and running effectively for a long time.
【学位授予单位】：新疆大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH136
【参考文献】
相关期刊论文 前9条
1 王胜军,郝木明,张书贵;机械密封温度场计算[J];化工机械;2004年04期
2 彭旭东,谢友柏,顾永泉;机械密封端面温度的确定[J];化工机械;1996年06期
3 南小妮,周昆颖,张秋翔,蔡纪宁;CFD软件对螺旋槽干气密封的模拟[J];化工设备与管道;2005年04期
4 李红,吴文林,赵忠祥,李克永;机械密封环温度场的理论计算[J];流体工程;1986年08期
5 陈文毅;李学虎;管洪;;机械密封温度场的有限元计算法[J];流体工程;1991年10期
6 朱孝平;汪久根;周桂如;;机械密封端面温度简化计算模型[J];流体机械;1995年09期
7 陈利海,葛培琪,程建辉;机械密封温度场的可视化计算[J];流体机械;2001年05期
8 单晓亮;胡欲立;;基于Ansys的机械密封环温度场分析[J];润滑与密封;2006年09期
9 钟汝琳,陈次昌,关剑峰;机械密封环温度场及密封腔内流场分析[J];四川工业学院学报;2004年S1期
相关硕士学位论文 前1条
1 陈德林;波纹管机械密封的热动力学行为及流场研究[D];兰州理工大学;2007年
，本文编号：2429656
本文链接：https://www.wllwen.com/kejilunwen/jixiegongcheng/2429656.html
