斜齿轮与斜齿轮轴的三维参数化建模及其接触分析研究

介绍了在SolidWorks环境下用Visual C 编程实现伴齿轮和斜齿轮轴三维参数化建模的方法,并用CosmosWorks对斜齿轮和斜齿轮轴的啮合模型作接触应力分析研究。     

斜齿轮轴疲劳寿命分析及结构优化

某煤矿大型提升机械减速机高速斜齿轮轴发生断裂,采用ANSYS软件对斜齿轮轴进行静强度分析,确定其断裂原因是疲劳断裂,之后用ANSYS/FE-SAFE疲劳软件对斜齿轮轴进行疲劳寿命分析,并在此分析基础上对斜齿轮轴进行结构优化,保证安全生产.     

基于Ansys Workbench的斜齿轮轴有限元静力分析

本文对某大型船用绞车上使用的斜齿轮轴的受力情况与强度校核进行了理论分析,并利用CATIA建立斜齿轮轴三维模型,通过有限元分析软件ANSYS Workbench对齿轮轴进行静力分析,得到应力与应变分布云图,以达到强度校核的目的。该分析方法缩短了轴类零件设计时间,对轴类零件设计具有指导作用。     

基于Pro/E的少齿数齿轮轴参数化设计问题研究

基于三维CAD技术,提出了一种少齿数齿轮轴参数化建模方法。针对少齿数齿轮的斜齿及变位特点,对普通圆柱斜齿轮常用的建模方法中存在问题进行了分析研究,给出了少齿数齿轮轴的精确建模设计方法,从而减少了后续的设计误差与有限元分析误差。     

微机用于无差动滚铣斜齿轮调整计算

斜齿轮轴通常是在滚齿机上滚切齿形。在没有滚齿机或因齿轮轴太长无法在滚齿机上装夹时,可改用螺旋花键轴铣床或普通花键轴铣床铣出齿形。不过普通花键轴铣床是为铣直槽花键轴而设计的,不带差动机构。为铣切斜齿轮,当滚刀轴向进给时,齿坏还应做相应的附加转动。为此必须对进给和分     

TK系列齿轮减速器轴向力的分析与改进

弧齿锥齿轮旋向和转动方向决定轴向力的方向,针对TK系列斜齿轮-弧齿锥齿轮减速器中齿轮轴上轴向力叠加的问题,分析了不同条件下各齿轮轴的轴向受力情况。提出改变现有TK系列齿轮减速器中齿轮的旋向组合,以减小滚动轴承、齿轮轴以及箱体承受的载荷,提高其使用寿命。     

微机用于无差动滚铣斜齿轮调整计算

斜齿轮轴通常是在滚齿机上滚切齿形。在没有滚齿机或因齿轮轴太长,无法在滚齿机上装夹时,可改用螺旋花键轴铣床或普通花键轴铣床铣出齿形。不过普通花键轴铣床是为铣直槽花键轴而设计的,不带差动机构。为铣切斜齿轮,当滚刀轴向进给时,齿坯还应做相应的附加转动。为此必须对进给和分齿运动进行精确的特殊计算来实现工件与滚     

介绍几种齿轮消隙的典型结构

总结了几种齿轮消隙的典型结构,并简要介绍了斜齿轮轴向垫片调整法、偏心轴套调整法和轴向弹簧调整法的结构及消除方法.     

小模数斜齿花键轴的轧制

斜齿具有齿面接触性好,啮合系数大、传动平稳,易使机构紧凑等优点,故斜齿广泛用于汽车、摩托车和机器制造行业。目前,斜齿花键轴通常采用洗齿,滚齿和剃齿加工。这些方法生产效率低,加工时金属纤维被切断,机械性能大大降低。为克服这些缺点,可采用轧制加工。这种加工方法既能提高零件精度和机械性能,还能提高材料利用率,而且生产效率能提高二十余倍,国外已广泛推广。现以雅马哈250摩托车启动齿轮轴的斜齿花键轴为例,介绍小模数斜齿花键轴的轧制。     

斜齿轮轴微变形淬火

图1所示斜齿轮轴模数为6,材料为42crMo,预先经调质处理(HB 269～286),要求齿部淬硬至 HRC40～45,若采用高频表面淬火则可能产生以下缺     

Vibration from a shaft-bearing-plate system due to an axial excitation of helical gears

In this paper, a simplified model is studied to predict analytically the vibration from the helical gear system due to an axial excitation of helical gears. The simplified model describes gear, shaft, bearing, and housing. In order to obtain the axial force of helical gears, the mesh stiffness is calculated in the load deflection relation. The axial force is obtained from the solution of the equation of motion, using the mesh stiffness. It is used as a longitudinal excitation of the shaft, which in turn drives the gear housing through the bearing. In this study, the shaft is modeled as a rod, while the bearing is modeled as a parallel spring and damper only supporting longitudinal forces. The gear housing is modeled as a clamped circular plate with viscous damping. For the modeling of this system, transfer matrices for the rod and bearing are used, using a spectral method with four pole parameters. The model is validated by finite element analysis. Using the model, parameter studies are carried out. As a result, the linearized dynamic shaft force due to the gear excitation in the frequency domain was proposed. Out-of-plan displacement from the forced vibrating circular plate and the renewed mode normalization constant of the circular plate were also proposed. In order to control the axial vibration of the helical gear system, the plate was more important than the shaft and the bearing. Finally, the effect of the dominant design parameters for the gear system can be investigated by this model.     

粉末冶金斜齿轮系统振动频率响应分析

利用有限元法建立包含齿轮副、传动轴、轴承和箱体的齿轮系统完整的动力学模型。使用有限元分析软件 MSC.Nastran计算了在齿轮动态激励下粉末冶金斜齿轮系统的振动响应,并与38CrMoAl刚性齿轮系统进行比较。     

Effects of different coupling models of a helical gear system on vibration characteristics

Time-varying mesh stiffness (TVMS) and the dynamic coupling between the helical gears have a great influence on the vibration characteristics of a helical gear rotor system. Considering the effects of TVMS and adopting two coupling models (lateral-torsional coupling model and lateral-torsional-axial-swing coupling model), the dynamic behavior of a helical gear system was studied. First, an analytical model was used to analyze TVMS of a helical gear pair where the helical tooth is simulated by many spur tooth slices along the direction of the tooth width and the mesh stiffness of each slice is calculated using the energy method. Then, considering the effects of the TVMS excitation, the finite element model of a helical gear rotor system was established. Gear mesh was simulated by the above-mentioned two coupling models to investigate the effects of coupling forms on the system vibration characteristics. The strain energy was used to distinguish the dominant mode and dominant shaft of a gear system in natural characteristics analysis. The results show that the full coupling model can analyze accurately the vibration characteristics of the system and the axial and swing motions cannot be ignored in vibration analysis. Finally, the effects of helix angle on TVMS and vibration responses of a helical gear system were also studied.     

双级斜齿圆柱齿轮传动的数学模型研究

双级斜齿圆柱齿轮减速器的优化设计计算十分复杂,数学模型建立的正确与否,关系到齿轮传动优化设计的成败.减速器的体积、重量主要由齿轮和轴的尺寸来决定,因此可以用所有齿轮及轴的体积之和来建立目标函数,把齿轮和轴的强度要求作为约束条件,建立包含12个设计变量和24个约束条件的双级斜齿圆柱齿轮减速器优化设计的数学模型.     

斜齿轮副动态特性对支承结构参数的灵敏度

针对斜齿轮副动特性的灵敏度问题 ,考虑轴和轴承的柔性以及由于轮齿啮合而产生的横向运动、扭转运动、轴向运动与旋转 (摆动 )运动间的动态耦合的影响 ,建立了斜齿轮传动系统的动力学模型 ,推导了固有频率及动态啮合挠度相对于斜齿轮副支承结构参数的灵敏度计算公式 ,并给出了实例。这一方法可用于斜齿轮传动系统的动态优化设计及改进设计     

基于Pro/E的斜齿圆柱齿轮减速器三维建模及运动分析

在对斜齿圆柱齿轮减速器参数优化分析的基础上,利用Pro/E软件建立了减速器的三维实体模型并进行虚拟装配,最后对该模型进行运动分析,给输入轴一定转速,由仿真分析得出中间轴和输出轴转速,并将仿真结果与理论计算进行对比,从而验证该模型的有效性和可行性。     

二级斜齿圆柱齿轮减速器中间轴强度校核方法研究

传统的轴类零件强度校核方法比较繁琐费时,并且相对误差较大;采用有限元分析方法校核轴的强度,操作方便,结果相对比较科学、可靠。通过对二级斜齿圆柱齿轮减速器中间轴进行强度校核,结果表明有限元法更加符合轴的实际工作状态。     

Y54插齿机上插制轴齿斜齿轮的精度保证

通过对废旧Y54插齿机维修,加高改装,安装螺旋导轨,调整刀架及工作台蜗轮副,选用合适的刀具、切削液、设计合理的夹具,并对工件的材料正火热处理工序加以控制,达到了插制轴斜齿轮的精度要求,满足了生产需要。     

Adaptive filtering based system for extracting gearbox condition feature from the measured vibrations

Vibration signals measured from a gearbox are complex multi-component signals, generated by tooth meshing, gear shaft rotation, gearbox resonance vibration signatures and a substantial amount of noise. This article presents a novel scheme for extracting gearbox fault features using adaptive filtering techniques for enhancing condition features, meshing frequency sidebands. A modified least mean square (LMS) algorithm is developed and validated using only one accelerometer, instead of using two accelerometers in traditional arrangement, as the main signal and a desired signal is artificially generated from the measured shaft speed and gear meshing frequencies. The proposed scheme is applied to a signal simulated from gearbox frequencies with a numerous values of step size. Findings confirm that 10⁻⁵ step size invariably produces more accurate results and there has been a substantial improvement in signal clarity (better signal-to-noise ratio); which make meshing frequency sidebands more discernible. The developed scheme is validated via a number of experiments carried out using two-stage helical gearbox for a pair of healthy gears and one pair suffering from a tooth breakage with severity fault 1 (25% tooth removal), and fault 2 (50% tooth removal) under loads (0%, and 80% of the total load). The experimental results show remarkable improvements and enhance gear fault features. This paper illustrates that the new approach offers a more effective way to detect early faults.