螺旋锥齿轮振动信号产生机理与检验系统设计

对螺旋锥齿轮振动检测的重要性和检验手段的落后现状,在分析齿轮振动信号产生机理的基础上,基于混合编程的思路,阐述了检验系统硬件平台搭建和软件编程的具体步骤,该系统对齿轮振动的数字化控制具有一定的实用价值。     

摆线齿锥齿轮加工中相关检验新方法

摆线齿锥齿轮可通过硬齿面刮削消除热处理变形,具有加工效率高、模数大、齿面硬的特点,所以非常适用于大型煤矿、冶金、运输等重型机械设备,针对大型摆线齿锥齿轮的生产实际提出并阐述了以更加直观和准确的实体建模方式对可能发生的刀盘干涉、齿面刮伤、槽底留埂、小齿轮根切或齿顶变尖进行检验.     

螺旋锥齿轮数字化滚动检验运动模型的推导与实验研究

介绍了螺旋锥齿轮滚动检验的基本情况,从齿面啮合关系入手,推导了滚动检验的数字化运动模型,并在机械式滚动检验机上进行了有效的实例验证,对滚检机的开放式数控化改造具有重要的参考价值.     

Sculptured surface machining of spiral bevel gears with CNC milling

Gears are crucial components for modern precision machinery as a means for the power transmission mechanism. Due to their complexity and unique characteristics, gears have been designed and manufactured by a special type of machine tools, such as gear hobbing and shaping machines. In this paper, we attempt to manufacture the spiral bevel gear (SBG: the most complex type among the gear products) by a three-axis CNC milling machine interfaced with a rotary table. This consists of (a) geometric modeling of the spiral bevel gears, (b) process planning for NC machining, (c) a tool path planning and execution algorithm for both 4-axis and 3/4-axis (three out of four axes) controls. Experimental cuts were made to ascertain the validity and effectiveness of the presented method with a CNC milling machine controlled by the 3/4-axis control mode.     

以＊.SCR接口开发精锻从动螺旋伞齿轮模具CAD系统

分析了AutoCAD中*. SCR接口技术,编制出高级语言与AutoCAD接口及应用程序,开发出用于精锻从动螺旋伞齿轮模具设计计算及自动绘图的软件系统。     

机器人用RV减速器的瞬心特性和受力分析

为深入认识 RV减速器的工作原理 ,研究了该机构的瞬心特性 ,并在机构组成的基础上进行了受力分析 ,结果表明 :瞬心位置与行星轮中心的距离为一常数 ,瞬心的力学意义相当于一固定铰链 ;运动中驱动力大小分布不均匀 ,这是设计过程中要考虑的一个因素     

一种傅里叶非圆齿轮驱动的横封机构设计

目的设计一种符合块状包装物横封要求的横封机构,以更好满足横封的工艺要求。方法在分析块状物体横封工艺过程基础上建立傅里叶非圆齿轮数学模型,根据工艺要求建立目标函数以及横封机构参数优化模型,并通过实例进行验证。结果通过实例计算可知,优化设计得到的傅里叶非圆齿轮能更好满足设计要求,比原有传统偏心圆具有更高的灵活性。结论采用更加灵活的傅里叶非圆齿轮副驱动横封机构对横封机构参数进行优化设计,能够更好地满足块状物体横封工艺要求。     

考虑ARMA风速模型半直驱风电行星齿轮传动系统动力学分析

针对半直驱风电行星齿轮系统的变速变载的特点,考虑风速变化引起的外部载荷激励,采用自回归-滑动平均(ARMA)方法建立模拟风速模型,在考虑时变啮合刚度、啮合阻尼等因素的基础上,采用集中参数法建立了行星齿轮传动系统平移-扭转耦合动力学模型。并采用四阶龙格-库塔法,求解1.5 MW半直驱风力发电行星齿轮传动系统的动态响应。     

Sources of time‐varying contact stress and misalignments in wind turbine planetary sets

Recent data shows that 90% of large wind turbines include a gearbox, and industry forecasts expect this figure to remain relatively stable. With global annual volumes (2009) of around 18,600 units, the quality, cost and performance of gearboxes is of paramount importance to the wind sector. The industry has been focusing some attention on gearbox reliability, as demonstrated by a growth in the number of specific seminars and collaborative programs on this topic. One aspect that needs to be brought to an industry‐wide forum is the understanding of the complexity of bearing design in the gearbox and the careful attention that needs to be paid to ensure a reliable gearbox design. This paper seeks to address this issue by clear demonstration of design issues using a model of the gearbox from the National Renewable Energy Lab's Gearbox Reliability Collaborative. Detailed models are presented with focus on determining the quality of the function of the planetary gear stages. Key design drivers are discussed such as the quality of alignment at the gears and bearings and the loads and stresses seen on these components. Under a design load case with a significant rotor off‐axis moment the stresses in the planet gears and bearings are investigated. It is shown how the misalignment of the planet pins varies with the rotation of the planetary set and how subsequently time‐varying contact stresses and load distributions occur in the planet gears and bearings. These factors strongly influence the fatigue life of the gearbox components as well as the level of vibration. Design tools are then used to demonstrate how small variations in the clearances of the planet carrier bearings can have a big effect on the quality of the design. Numerical studies show where optimal clearance settings lie and how the misalignment of the planetary set can be improved. Furthermore, a demonstration is made of how redesign of the bearing arrangement and subsequent optimization of the planet tooth geometry further improves the misalignment and results in significantly reduced time‐varying contact stresses, better load distribution and reduced vibration. It is illustrated that small clearances, such as in the carrier bearings, can have a large effect on the performance of the design and a study shows how to identify and reduce time‐varying misalignment and contact stresses resulting in lower vibration, lower fatigue and a more reliable product. Copyright © 2011 John Wiley & Sons, Ltd.     

渐开线椭圆齿轮造型设计与分析

针对椭圆齿轮设计繁复的现状,提出了渐开线椭圆齿轮造型设计与分析的新方法。即根据给定的传 动比函数的变化规律,选取该函数最合适的表达式,反求节曲线;利用瞬时曲率圆法,进行渐开线椭圆齿轮齿廓造 型;用一对椭圆齿轮相互啮合时的传动比进行对比分析,验证了此方法不但可行而且具有较高精度。