基于RS232接口的电机状态上位机监控界面设计

针对平动啮合电动机,提出了基于Visual C＋＋6.0的编程平台,实现计算机对这种新型电机的监控界面设计。并通过实验验证了本监控界面具有监视和控制电机状态的功能。     

The journal Communications in Numerical Methods in Engineering with Biomedical Applications becomes the International Journal for Numerical Methods in Biomedical Engineering (IJNMBE) from 1st January 2010

Communications in Numerical Methods in Engineering, founded by Roland W. Lewis in 1985, will change its title to the ‘International Journal for Numerical Methods in Biomedical Engineering’ and have a revised Aims and Scope. Copyright © 2009 John Wiley & Sons, Ltd.     

单螺杆压缩机螺旋啮合副型线设计及加工方法研究

对于单螺杆压缩机来说,一种性能良好的螺旋啮合副至关重要。本文对新型螺旋啮合副型线进行设计,并对此种型线的螺旋啮合副加工技术进行研究。     

Effect of Mesh Resolution on the Particle Deformation during Cold Spraying by Eulerian Formulation

Numerical simulations focusing on the impacting behavior of cold sprayed particles were usually conducted by the Lagrangian formulation.However,the calculated outputs were much dependent on the meshing size owing to the excessive element distortion.Therefore,the Eulerian formulation becomes attractive,because it can avoid the extreme distortion of elements.In the present study,a copper particle impact on the same material substrate in cold spraying was simulated using the Eulerian formulation available in the ABAQUS software(Ver 6.8).The dependency of the calculated outputs on the meshing resolution were detailedly investigated.Results show that the meshing resolution not only has an effect on the shape of the deformed particle,but also it can significantly influence the maximum plastic strain and temperature under a given impact velocity.In addition,the copper particle deformation process at the critical velocity of 310 m/s shows that a jet composed of both of the particle and substrate materials can be formed and gets elongated with the impact time.     

CB/A14内啮合齿轮泵创新研究

在叉车液力变速箱传动系统中,供油泵是其核心部件.在以往的供油泵总成中,主动齿轮是一个关键部件,但受齿轮加工精度的影响,渗油现象较普遍,使供油泵的工作平稳性差、噪声大.为了克服这些不足,研发一种高效的CB/A14系列内齿轮啮合供油泵供油系统,对提高部件质量、保证整机质量水平有重要意义.     

单螺杆压缩机型线的设计、加工及最新研究进展

对单螺杆压缩机啮合副型线的设计特点进行了研究,并分析啮合副的啮合过程;然后对单螺杆压缩机型线加工技术做出分析和概括,并介绍单螺杆压缩机型线研究的最新进展。     

斜齿轮有限元网格自动生成及齿根应力分析

将三维有限元网格自动生成技术与有限元分析软件ANSYS相结合,对斜齿轮加载方式和齿根过渡圆角进行分析。运用FORTRAN语言,并根据理论计算得到齿面点坐标,编制程序,建立斜齿轮三维有限元分析模型。全部算法实现程序化,只需输入齿轮的基本参数和网格控制参数,就能自动生成沿齿长和齿高均匀分布网格。然后将有关的节点和网格数据文件导入ANSYS,对比几种加载方式,确定最佳的加载方式,并针对几种齿根圆角,分析对比其对齿根弯曲应力的影响。     

网格划分对边坡稳定有限元分析的影响

网格划分对边坡稳定性有限元分析的准确性有很大影响,而目前对此影响的研究相对不够。以有限元强度折减法在边坡稳定性分析中的一标准算例为依据,探讨ABAQUS中网格划分技术、网格形状、网格密度、局部加密网格、网格生成算法和单元积分方法对边坡稳定性计算的影响。最后用一复杂土坡案例分析以上诸因素对边坡稳定性分析的敏感性,得出在适当范围内加密网格可节约计算时间,二次积分单元计算精度高但更耗成本等结论,对边坡稳定分析的网格划分具有一定参考价值。更多还原     

基于负载与啮合特征的WN齿轮传动接触强度分析

为了探求WN齿轮传动的强度机理和失效原因, 依据WN齿轮负载传动时齿面的三维几何接触特征和弹性变形理论建立了接触强度分析模型,提出了基于WN 齿轮啮合特征的接触强度分析方法．根据啮合过程中齿面接触载荷、啮合齿轮副和接触点数的变化,利用有限元分析进行了各种状况下的齿面接触应力计算,明确了WN齿轮接触强度设计中的螺旋角、中心距误差、齿宽及重合度对最大接触应力的影响结果．研究发现,当中心距和重合度及螺旋角等变化时,WN齿轮与渐开线齿轮呈现出了完全不同的载荷特征和强度机理．