庇波磁齿轮减速器设计

提出了一种安全不同于传统谐波齿轮减速器的新型谐波磁齿轮减速器。该减速器用磁齿轮代表机械齿轮，波发生器由一对极的凸极式永磁转子构成，它是该减速器的快转子，不产生变形的刚性杯形磁齿轮代替了柔轮，它是该减速器中的慢转子，固定内齿轮也以磁齿轮代替，它是砬速器中的定子，磁齿轮之间的啮合是无接触式啮合。     

Midwest Motion Products公司的直流齿轮电机产品

日前，Midwest Motion Products公司发布了新型的直流齿轮电机，包括有刷和无刷两种类型，直径从10mm至220mm。这种电机的主要特点是具有行星齿轮或正齿轮，低齿隙的行星齿轮，齿轮比率根据其体积大小从2：1到46：1，656：1不等。     

模糊神经网络在齿轮故障诊断中的应用

介绍了模糊二维自组织神经网络在齿轮故障诊断中的应用方法，并通过齿轮论证了该方法在齿轮故障分类中的实用性。该方法具有结构算法简单、无监督自学习和侧向联想等功能。它有很好的应用前景，可以广泛应用于齿轮的故障诊断。结果表明：模糊二维自组织神经网络是实时地解决齿轮故障中复杂的状态识别问题的一种有效工具。     

基于单片机的齿轮转速测量系统

齿轮转速是工业生产中的重要参数。设计了一种基于单片机的高精度齿轮转速测量系统，该系统以集成式霍尔齿轮传感器为敏感元件，单片机为控制核心实现了齿轮转速的高精度测量。     

汽车斜齿轮生产工艺对其使用寿命的影响

汽车斜齿轮工件形状复杂，工作条件恶劣，其质量的好坏隐藏着极大的交通隐患。为确保斜齿轮质量，工件在生产过程中各生产工序都应严格地控制。由于各种原因在使用过程中斜齿轮突然断裂的情况时有发生，而断裂的部位通常都在螺纹与直齿轮交界处或是直齿轮处。为摸清断裂的原因，我们对斜齿轮生产工艺对其质量的影响进行了分析。     

天线传动箱轴齿轮齿牙断裂分析

通过对某大型天线轴齿轮材料的检测分析表明，发生断齿的主要原因是该轴齿轮在生产过程的热处理淬火工序中严重过烧，基体材料晶粒严重粗大脆化，齿根部位的冲击韧性只有标准值的42％。     

伺服系统中精密传动链的制造

本文在介绍精密齿轮主要技术要求的基础上，分析了伺服系统中精密齿轮制造中的刀具安装、工件定位、装夹问题，以及氮化齿轮的变形和氮化层深度的计算部下，并就解决的方法与途径进行了探讨。     

齿轮的激光热处理

本报告介绍了正齿轮表面激光淬火研究的结果，并将其特性与通常渗碳齿轮进行比较。为了控制激光束对齿轮诸齿的有效作用范围，研制成一种控制系统。激光表面淬火看来是可行的，但有几个问题待解决。该项研究由美国陆军航空研究和发展司令部进行。     

铝质齿轮在光电伺服座中的应用研究

介绍某小型光电搜索平台中传动齿轮的结构设计及加工工艺，提出使用锻铝材料并经瓷质氧化工艺来提高齿轮表面硬度及耐磨性，在保证足够的强度基础上大大减小了齿轮在整个系统重量中所占的比例。     

直齿圆柱齿轮和斜齿轮测绘方法研究

直齿圆柱齿轮和斜齿轮是实际应用中最为常见的齿轮,在长期使用的过程中受到各种因素的影响,致使齿轮失效。齿轮的测绘工作是比较复杂,需要掌握基本测绘仪器的操作方法和与齿轮测绘相关的内容。本文主要结合万能工具显微镜对直齿圆柱齿轮和斜齿轮的测绘进行了研究。     

回归挂轮配齿法及其应用

介绍了一种机械传动变速用的回归挂轮配齿新方法。对其使用条件、配齿原理进行了扼要分析,列出了调速级的传动比通式,综合了若干常用回归挂轮组的设计数据,并对回归挂轮配齿法的应用作了举例说明。     

飞秒激光精修面齿轮工艺参数的多目标优化

基于面齿轮传统机械加工精度欠佳的局限性,最后工序采取飞秒激光对面齿轮进行精修加工,在满足面齿轮烧蚀深度和齿面粗糙度约束的前提下,建立了以飞秒激光精修效率和表面质量为目标函数的多目标优化数学模型。利用内点罚函数并行以gamultiobj函数为基础的改进遗传算法求解优化模型,得到两组较优的飞秒激光加工面齿轮参数方案,与参数优化后的激光实验结果相对比,最大相对误差均在合理范围内,证明了优化的合理性,提供一定的理论指导在实际生产领域对飞秒激光精修面齿轮的运用。     

基于FSA ACO混合改进算法的蜗轮蜗杆故障识别

针对蜗轮蜗杆故障诊断问题,提出基于FSA ACO混合改进算法的蜗轮蜗杆故障识别的研究方法。该方法提出了FSA ACO混合改进策略,在谋求一个优势互补的基础上,对算法相关参数优化。同时针对该算法与蜗轮蜗杆故障识别结合构建算法模型问题,提出利用近邻函数准则作理论桥梁策略,寻找一种新的基于FSA ACO混合算法的蜗轮蜗杆故障诊断技术研究方法。以WPA40型号的蜗轮蜗杆为测试对象,验证了该研究方法的可行性和有效性。     

高强度轻型材料齿轮传动动态接触仿真研究

由于航空、航天、电子等领域对重量的严格要求,研究高强度轻型材料以取代钢材,是走上第四代齿轮的热点课题。但是由于在传动过程中相互啮合的齿面相对运动为滚动兼滑动,并且,在不同的啮合位置其相对滑动速度,接触应力不断变化,所以精确仿真计算某种材料齿轮啮合过程的接触应力变化,对研究齿轮材料特性十分必要。本文运用Ls-Dyna动态仿真软件,对尼龙66材料齿轮啮合过程进行了动态仿真计算并与试验结果进行了对比,此仿真方法可以运用到所有齿轮材料研究,为高强度轻型材料齿轮的进一步发展提供了新的有效途径。     

A fault detection strategy using the enhancement ensemble empirical mode decomposition and random decrement technique

The vibration signals of mechanical components with faults are non-stationary and the feature frequencies of faulty bearings and gears are difficult to be extracted. This paper presents a new approach that combines the fast ensemble empirical mode decomposition (EEMD) to decompose the non-stationary signal into stationary components, the random decrement technique (RDT) to extract the impulse signals of stationary components, and Hilbert envelope spectrum to demodulate the impulse signals to detect faults in bearings and gears. The proposed approach uses the fast EEMD algorithm to extract intrinsic mode functions (IMFs) from vibration signals able to tack the feature frequency of bearings and gears. IMF1 is further extracted by the RDT, and the feature frequencies are determined by analysing the signals using Hilbert envelope spectrum. Numerical simulations and experimental data collected from faulty bearings and gears are used to validate the proposed approach. The results show that the use of the EEMD, the RDT, and the Hilbert envelope spectrum is a suitable strategy to detect faults of mechanical components.     

A non-contact gear measurement method based on laser vision

In order to classify the gears and achieve high precision measurement results, a non-contact gear measurement system based on the laser vision is developed in this paper. The laser vision precision measurement method （LVPMM） is pro- posed to ensure the accuracy. Experimental results indicate that the gear measuring uncertainty is 2.1 /am. The preci- sion can satisfy the gear measurement requirements for two-grade or under two-grade standard gears in industry, and can classifv the gears very well     

Control of low velocity friction and gear backlash in a machine tool feed drive system

Precision-controlled mechanisms are commonly used in machining applications where the feed rates are low, direction reversals are necessary to obtain the desired work piece profile and precision requirements are in the order of micrometers or sub-micrometers. Under these conditions, friction and gear backlash effects contribute significantly to the dynamics of the system. This study investigated the use of neural network models to compensate for these effects. The approach was to switch between two controllers: (i) a proportional-plus-derivative controller together with a feedforward friction compensator when the transmission gears were engaged; and (ii) a feedforward backlash controller when the transmission gears were disengaged. The control scheme was experimentally verified using a retrofitted geared head engine lathe. The results obtained were compared to those obtained with a compensation method found in the literature.     

Surface-micromachined gear trains driven by an on-chipelectrostatic microengine

Test results for a polysilicon, surface-micromachined, electrostatically-actuated microengine driving multiple gears are presented. The microengine provides output in the form of a continuously rotating output gear (50 μm in diameter) that is capable of delivering torque to additional geared mechanisms. The microengine can be operated at varying speeds and its motion can be reversed. A rotational speed of up to 200000 r/min while driving multiple gears has been obtained. Drive of a 1600 μm diameter optical shutter has also been demonstrated. The resultant microengine and gear train, produced by polysilicon surface-micromachining techniques, are completely batch-fabricated without the need for piece-part assembly     

Valve timing and valve lift control mechanism for engines

A new type engine valve control system has been presented, in which both the valve lift and valve timing are controlled directly by electric motors. A mechanism of the valve timing control system is made of planetary gears. The outer gear is the timing pulley which has a timing belt driven by the crankshaft of an engine. Two planetary gears are inside of the pulley. The gears engage with the inner gear of the pulley. The center of the disc, which has centers of the planetary gear, is connected to the camshaft. Then, the crank rotation is transmitted to the camshaft, and rotations of sun gear are added to the rotations of camshaft. This means that when rotation angle of the sun gear is controlled, the phase between the inlet valve and the exhaust valve can be controlled. The lift control system is made of linear slider and ball screw. The cam shape of this system is three-dimensional. The height of the cam varies along the axis of the shaft. When the ball screw rotates, the camshaft slides in the axial direction, so that the lift of the cam varies. The control method is presented for the mechanism, in which valve phase and the lift are controlled continuously. Experimental tests have been carried out for the system.     

滚削大质数斜齿及直齿齿轮加工

对大质数斜齿齿轮及大质数直齿齿轮滚削加工,分齿挂轮计算提出了新的计算方法,快速可行;滚齿机型号较多,本文对两种不同类型机床差动挂轮计算公式作了统一,并对计算公式中正负号的确定规则作了详尽阐述,以利挂轮计算准确无误.