基于Ansys的卧螺过滤离心机液压螺旋差速器的接触非线性分析
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摘要
液压螺旋差速器是卧式螺旋卸料过滤离心机的关键部件。它将液压技术应用到传统的差速器中,其结构简单、传递扭矩大、差转速无级可调,可充分改善离心机工作转矩的功效执行。分析了差速器运转时柱塞组件的受力关系,同时通过三维建模软件UG建立了差速器的几何模型。利用Hypermesh对几何模型进行了六面体网格划分,通过接触向导建立了柱塞组件之间的接触对,实现了不同部件之间不连续网格的连接;基于扩展拉格朗日算法对柱塞组件进行接触非线性分析,得到了组件的应力云图和路径图,得出在下死点附近处接触应力最大,接触区域符合赫兹接触理论,为进一步研究液压差速器使用寿命提供理论依据。
Hydraulic differential spiral is one of key components in horizontal spiral discharge filtering centrifuge. Hydraulic differential spiral applied hydraulic pressure technology to the traditional differential,its structure is simple transfer torque differential speed large and step-less adjustable of differential speed,and can fully improve effective carrying out of centrifuge working torque. The force bearing relationship between differential plunger components during operation was analyzed,and at the same time,through the three-dimensional( 3-D) modeling software UG,differential geometric model was established. The geometric model was gridded in hexahedral by using Hypermesh,through contact guide to establish the contact between the piston components to implement the discrete grid connection between different components. Based on the extended Lagrange algorithm,the contact nonlinear analysis was carried out on the piston components for obtaining the stress nephogram and path of the component diagram. It is concluded that the contact stress at near the dead center is the largest and contact area is in line with the Hertz contact theory,which provide theoretical basis for further research of hydraulic differential service life.
Hydraulic differential spiral is one of key components in horizontal spiral discharge filtering centrifuge. Hydraulic differential spiral applied hydraulic pressure technology to the traditional differential,its structure is simple transfer torque differential speed large and step-less adjustable of differential speed,and can fully improve effective carrying out of centrifuge working torque. The force bearing relationship between differential plunger components during operation was analyzed,and at the same time,through the three-dimensional( 3-D) modeling software UG,differential geometric model was established. The geometric model was gridded in hexahedral by using Hypermesh,through contact guide to establish the contact between the piston components to implement the discrete grid connection between different components. Based on the extended Lagrange algorithm,the contact nonlinear analysis was carried out on the piston components for obtaining the stress nephogram and path of the component diagram. It is concluded that the contact stress at near the dead center is the largest and contact area is in line with the Hertz contact theory,which provide theoretical basis for further research of hydraulic differential service life.
引文
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[2]FENG Hui,ZHANG Jianrun,ZHOU Hui.The Dynamic Analysis of Horizontal Screw Sedimentation Centrifuge[EB/OL].http://g.wanfangdata.com.cn/,2010 IEEE.Siebtechnik.
[3]王琪,刘汝波,李荣敏,等.卧式螺旋卸料过滤离心机转鼓开孔削弱系数的研究[J].机械设计与制造,2013(2):220-222.
[4]王琪,杨彬,刘汝波,等.基于Hypermesh和Ansys的卧螺过滤离心机转鼓系的模态分析[J].机械科学与技术,2013(6):873-878.
[5]Siebtechnic.Conturbex the worm/screen centrifuge[M].Germany:siebtchnic Gmbh,2008:3-5.
[6]虞培清,王则胜.行星齿轮差速器对提高卧式螺旋离心机性能的技术作用[J].工程设计学报,2002(9):192-194.
[7]周成蹊,钱健航,孙详建,等.大扭矩、低差速液压差速器测试平台设计及应用的设计[J].机床与液压,2011(6):61-64.
[8]屈年凯.国产液压差速器在卧螺离心机上的应用[J].绿色科技,2012(1):204-206.
[9]程海林.径向柱塞式液压马达等接触应力内曲线的研究[D].杭州:浙江工业大学机电工程学院,2004:8-9.
[10]龚俊,路玉峰,辛舟,等.基于SIMULINK的液压驱动卧螺离心机调速特性仿真[J].机床与液压,2006(2):203-204.