双圆弧齿轮的失效分析

本分析了双圆弧齿轮的失效形式，并提出了预防失效、提高减速器使用寿命的方法．     

煤矿机械中齿轮的失效形式及改进方法

煤矿机械具有工作负荷大、环境差的特点,通过对煤矿机械中齿轮失效形式的分析,阐述了造成传动齿轮失效的原因,从而提出了一些能够提高煤矿机械齿轮传动质量,延长煤矿机械齿轮使用寿命的改进途径。     

影响齿轮失效的因素分析

齿轮是机械传动中使用较多的零件,本文对齿轮材料的选择、热处理、加工方法、润滑剂、齿轮的安装和工作温度等因素进行了探讨,分析了解齿轮失效的原因。     

油润滑下短碳纤维强化PEEK齿轮接触疲劳试验研究

针对注塑成型的碳纤维强化PEEK(PEEK-CF)齿轮在接触疲劳方面所进行的研究较少、失效机理尚不清晰的问题,开展30%PEEK-CF齿轮几何精度、齿面粗糙度和注塑缺陷的表面完整性测试表征,并进行油润滑下钢-PEEK-CF齿轮副耐久试验,绘制PEEK-CF齿轮接触疲劳S-N曲线。发现PEEK-CF齿轮能更好地适用于中低载荷工况,认为其在输出扭矩为40 N·m、接触应力为323.6 MPa的条件下有无限寿命。通过对失效试件断口SEM图进行失效分析,判断30%PEEK-CF齿轮失效机理主要为基体内碳纤维断裂。     

齿轮失效实例分析和改进措施

材料选择不合理．淬火时加热温度不够或保温时间不够长．以及硬度不够和金相组织不符合技术条件要求等．都能引起齿轮工作时失效。本文对上述3种失效原因进行了分析，并提出了改进措施。     

可调中心距齿轮链空程的统计分析

给出了可调中心距齿轮链空程的数学模型及其统计性质,为传动精度的计算奠定了理论基础。     

渐开线标准齿轮啮合的几何画板实现

本文利用几何画板实现渐开线标准齿轮及其啮合。     

从动齿轮齿根弯曲应力计算的商榷

本文对齿轮齿根弯曲应力计算表达式σＦ＝ＫＦｔ／ｂｍＹＦａＹｓａ中齿宽ｂ以及对在两轮齿宽不相等的情况下，运用σＦ２＝σＦ１ＹＦａ２Ｙｓａ２／ＹＦａ１Ｙｓａ１求从动轮上的齿根弯曲应力提出商榷；并对式中从动轮所受的圆周力Ｆｔ２计算谈一点粗浅看法。     

准双曲面齿轮降噪试验研究

准双曲面齿轮在高速运转时的噪声问题，国内外各生产厂家和各高等院校都在从事研究与攻关，提出了各自的观点。本文经综合分析准双曲面齿轮降噪的各种观点，并在生产实际中通过各种降噪试验，结果表明，一是可以通过加高齿高为齿轮齿顶修缘提供一个多余的齿高量，从而降低或消除啮入噪声；二是可以加长齿长方向的重叠系数，使重叠系数尽可能大，至少超过2．0，这样能有效降低噪声。     

网络失效管理系统的分析与设计

分析了失效管理与其它服务以及数据库的交互，对网络失效管理系统中的获取失效信息、分析失效原因、处理失效事件等功能进行了讨论，并提出了基于知识的网络失效管理系统的设计方法。     

Finite element analysis of internal gear in high-speed planetary gear units

The stress and the elastic deflection of internal ring gear in high-speed spur planetary gear units are investigated. A rim thickness parameter is defined as the flexibility of internal ring gear. Six evenly spaced linear springs are used to describe the fitting status between internal ring gear and the gearcase, The finite element model of the whole internal ring gear is established by means of Pro/E and ANSYS. The loads on meshing teeth of internal ring gear are applied according to the contact ratio and the load-sharing coefficient. With the finite element analysis （FEA）, the influences of flexibility and fitting status on the stress and elastic deflection of internal ring gear are predicted. The simulation reveals that the principal stress and deflection increase with the decrease of rim thickness of internal ring gear. Moreover, larger spring stiffness helps to reduce the stress and deflection of internal ring gear. Therefore, the flexibility of internal ring gear must be considered during the design of high-speed planetary gear transmissions.     

可调中心距齿轮链空程的计算方法

根据可调中心距齿轮链空程的数学模型的统计性质,给出了工程上有效的计算方法     

低速重载大齿轮其类型的选择及结构设计

扼要介绍低速重载大齿轮传动的应用和特点，详细分析低速重载闭式大齿轮类型的选择和直径大于1米的大齿轮的结构设计．     

观察自行车的齿轮

范老师给我们布置了一项任务：课外观察自行车有几个大齿轮和几个小齿轮;大齿轮转动一圈小齿轮转动几圈,小齿轮转动一圈大齿轮转动几圈。     

Virtual System Solution of CNC Machine for Spiral Bevel and Hypoid Gears

A virtual computerized numerical control C CNC） processing system is built for spiral bevel and hypoid gears. The pre-designed process of the solution to locate the way of realization is investigated. A kind of combined programming method and principle of solid modeling are chosen. Multienvironmental programming thought and the inter-connected mechanisms between different environments are applied in the proposed system. The problems of data exchange and compatibility of modules are settled. Environment of the system is founded with object oriented programming thought. AutoCAD is located as the graphic environment. Matlab is used for editing the computation module. Virtual C ＋＋6.0 is the realization environment of the main module. Windows is the platform for realizing the multi-environmental method. Through establishing the virtual system based windows message handling mechanism and the component object model, the application of multienvironmental programming is realized in the manufacture system simulation. The virtual gear product can be achieved in the accomplished software.