基于有限元法的MC尼龙斜齿轮性能分析

发布时间：2017-12-31 21:15

本文关键词：基于有限元法的MC尼龙斜齿轮性能分析　出处：《湘潭大学》2011年硕士论文　论文类型：学位论文

【摘要】：MC尼龙(Monomer Casting Nylon)又称单体浇铸尼龙,具有强度高、韧性好、抗冲击、耐疲劳,并且具有较好的抗蠕变、吸音、回弹和很好的耐磨、自润滑、与其他材料不粘结等多种独特性能,是广泛应用于几乎所有的工业领域的工程塑料。由于MC尼龙的上述特有性能,使用MC尼龙材料制作齿轮,在某些情况下将发挥比金属齿轮更好的作用。与传统的金属齿轮相比MC尼龙齿轮强度和弹性模量均较低,难以承受重载荷,所以限制了其应用领域。为了使其更好地应用于工程实际,本文的对MC尼龙斜齿轮力学性能进行分析,主要工作和研究内容如下: 1.对目前塑料齿轮在工业领域的应用和发展、应用有限元法对齿轮进行模态分析、以及应用有限元接触方法对齿轮进行模拟分析的研究现状和进展,进行了简要的概述。 2.通过有机结合SolidWorks及其插件GearTrax、HyperMesh及ANSYS软件建立了斜齿轮及斜齿轮副的三维有限元模型。这一从建立几何模型到最终进行有限元计算的方法,为工程人员及科研工作者进行有限元模拟分析提供了快速有效的途径。 3.在上述建模的基础上,应用ANSYS的Block Lanczos法对MC尼龙斜齿轮进行模态分析,提取了低价固有频率和对应的主振型,较好地研究了系统的固有特性,为减小齿轮振动和噪声及避免齿轮传动系统发生共振,激振力的频率应与系统的固有频率错开。 4.建立MC尼龙斜齿轮副啮合三维有限元模型,通过应用ANSYS中瞬态动力学的full法,对斜齿轮副的啮合传动过程进行计算机模拟实验。结果表明,齿轮的最大应力出现在齿根位置,最大应力为84.3MPa,满足该载荷工况下的强度要求。接触线宽度和接触线倾斜角能反映出齿轮副在啮合过程中齿轮运行的平稳性。模拟实验结果为齿轮接触线宽度为1.33mm,接触线倾斜角与齿轮螺旋角大致相等,这表明斜齿轮在啮合过程中运行能保持相对平稳。同时,模拟实验还得到了齿根应力谱,为齿轮疲劳寿命计算提供依据。这些研究结果对进一步研发、改进和优化齿轮具有一定的参考价值。文章最后就进一步的研究方向做出了阐述。
[Abstract]:MC nylon , also known as monomer casting nylon , has many unique properties such as high strength , good toughness , impact resistance , fatigue resistance , good creep resistance , sound absorption , rebound and good wear resistance , self - lubrication , non - bonding with other materials , etc . It is widely used in almost all engineering plastics in the field of industry . Compared with the traditional metal gears , the strength and the elastic modulus of MC nylon gears are low , the heavy load is difficult to bear , so the application fields are limited . In order to better apply the MC nylon gear to the engineering practice , the mechanical properties of MC nylon helical gears are analyzed , and the main work and the research contents are as follows : 1 . Based on the application and development of plastic gear in the field of industry , the finite element method is applied to the modal analysis of gear , and the research status and progress of gear simulation analysis using finite element contact method are briefly summarized . 2 . The three - dimensional finite element model of helical gear and helical gear pair is established by means of the combination of the organic combination and the plug - ins , HyperMesh and ANSYS . This method provides a quick and effective way for the finite element simulation analysis of engineering personnel and scientific research workers from the establishment of the geometric model to the final finite element calculation method . 3 . On the basis of the above modeling , the block Lanczos method of ANSYS is applied to the modal analysis of MC nylon helical gear , the low - cost natural frequency and the corresponding main mode are extracted , the inherent characteristics of the system are studied well . In order to reduce the vibration and noise of the gear and avoid the resonance of the gear transmission system , the frequency of the excitation force should be staggered with the natural frequency of the system . 4 . A three - dimensional finite element model of MC nylon helical gear is established . The meshing transmission process of helical gear pair is simulated by full method of transient dynamics in ANSYS . The results show that the maximum stress of gear is about 84.3MPa , and the maximum stress is 84.3MPa . The contact wire width and the contact angle can reflect the stability of gear operation . The simulation results show that the bevel gear can be kept relatively stable during the meshing process . At the same time , the simulation experiment also obtains the tooth root stress spectrum , which provides the basis for the calculation of the fatigue life of the gear . The results of these studies have some reference value for further research and development , improvement and optimization of gears .

【学位授予单位】：湘潭大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH132.41

【引证文献】