油酸在齿轮切削加工润滑油中的应用研究

以油酸和正丁醇、乙二醇为原料合成的油酸丁酯、油酸乙二醇酯混合物,具有优良的润滑性和良好的耐磨性,添加 在齿轮切削油中,不仅可使工件的加工质量显著提高,同时延长了齿轮刀具的使用寿命。     

一种基于CATIA的蜗轮蜗杆建模方法研究及应用

蜗轮蜗杆传动在实现大传动比减速器中应用广泛.为了缩短蜗轮蜗杆设计周期、提高效率及降低研发成本,以某阀门执行装置减速器中蜗轮蜗杆为原型,基于CATIA软件详细介绍了其建模方法.将建好的模型导入ANSYS软件,对蜗轮蜗杆的啮合情况进行有限元仿真,得到其齿面接触应力分布.根据Hertz弹性碰撞理论,在ADAMS软件中进行蜗轮...     

改善蜗杆传动的性能

根据某小家电产品运行试验和检测中反映该蜗杆传动系统的主要问题 ,在不改变产品传动整体结构条件下 ,有针对性地提出相关参数、尺寸、结构和材料的改进方案。实践证明 ,新方案充分满足了产品的技术性能要求。     

平面包络环面蜗杆精度评价

根据国标GB/Tl6445-1996，提出参考性的平面包络环面蜗杆精度评价补充指标，进行平面包络环面蜗杆精度检测项目的完善；以平面包络环面蜗杆为例，实现对平面包络环面蜗杆误差的求解。     

齿轮传动中的最小油膜厚度与润滑

在齿轮传动中,齿面间润滑油膜的存在及其厚度对防止齿面失效具有重要意义。通过分析推导,给出啮合齿面任意啮合点最小润滑油膜的计算方法及啮合间油膜厚度的变化规律,同时给出高速重载条件下油膜不被破坏的条件及润滑油的选择。     

Some observations on lubricant performance testing using an I.A.E. gear machine

A number of synthetic aviation lubricating oils have been subjected to I.A.E. gear tests using case carburised gears of EN34 and EN39B steel at testing speeds of 2000–13000 r.p.m.The failure load values were lower for EN39B gears than for EN34, and this has been attributed to a lower hardness and a higher austenite content of the carburised case. Both types of gear material soften during testing due to general tempering in the hot oil, but since the bulk of the softening occurs early on in the testing schedule, the reference oil/test oil comparison is unaffected. Nevertheless, it should be remembered that I.A.E. test results refer to gears of hardness up to about 150 HV30 lower than their initial value.It has been found that an indication of the failure load values at high testing speeds can be calculated from experimental values obtained at lower speeds using the critical temperature approach due to Blok.     

平面二次包络环面蜗杆传动数字化设计系统研究

为提高平面二次包络环面蜗杆传动的设计效率,提出平面二次包络环面蜗杆传动数字化设计系统,研究和开发了平面二次包络环面蜗杆传动的参数优化设计软件系统,包括几何参数设计计算模块、强度校核模块、齿面接触线模块、蜗杆齿厚变化曲线模块和蜗杆根切判别模块.开发了平面二次包络环面蜗杆减速器参数化建模软件平台,包括零/部件的参数化建模和装配体的参数化建模.以具体实例说明该数字化设计系统能大大提高设计自动化水平.     

端面传动蜗轮副的三维参数化设计

利用Pro/E及其二次开发工具Pro/Toolkit实现端面传动蜗轮副的三维参数化设计。     

Geometrical aspects of double enveloping worm gear drive

Double enveloping worm gearing is expected to have contact over larger number of teeth and higher load carrying capacity compared to single enveloping worm gearing. In this paper, contact in this gearing is analysed by geometrical simulation of worm gear tooth generation using intersection profiles of different axial sections of worm representing the hob tooth profile with transverse plane of worm gear. The analysis reveals that in the engaging zone a straight line contact always exists in the median plane and intermittent contact exists at the extreme end sections of worm. This has lead to the idea of using two fly cutters positioned at the location identical to the extreme end sections of worm to generate full worm gear tooth thereby eliminating the need for hobs of complex geometry. For a given worm, a mating worm gear is machined in a gear hobbing machine using fly tool in two settings and nature of contact with the worm is checked by a blue test.     

Influence of lubricant on gear failures — test methods and application to gearboxes in practice

Base oil type, oil viscosity, and additive type and content have a strong influence on typical gear failures. As it is not possible to quantify the influence of a lubricant on load‐carrying capacity simply from a knowledge of the physical or chemical oil data, many test methods have been developed for the evaluation of mechanical—technological lubricant properties. Simple low‐cost bench test methods often show poor correlation with practice. From both experience and systematic investigation, it can be seen that testing of gear lubricants can be performed adequately only in gear test rigs using specified test gear geometry. The standard FZG back‐to‐back gear test rig has been developed over many years and improved for different types of gear failure simulation. The standard FZG oil test A/8.3/90 is widely used for the evaluation of the scuffing properties of industrial gear oils. Automotive gear oils of GL4 level can be tested in the step test A10/16.6R/90, and axle oils of GL5 level in the shock test S‐A10/16.6R/90. For slow‐speed regimes, the C/0.05/90:120/12 wear test can be used. The influence of lubricants on the micropitting performance of gears can be evaluated in the GF‐C/8.3/90 micropitting test. Different pitting tests are available, as single‐stage (PT‐C/9:10/90) or load spectrum (PT‐C/LLS:HLS/90) tests. The aim of this paper is to describe the influence of the lubricant on the different failure modes in gears, how to quantify this effect in adequate test methods, and how to introduce the results of such tests as determining values of the lubricant into load‐carrying capacity rating methods.     

Parametric analysis of the end face engagement worm gear

A novel specific type of worm drive, so-called end face engagement worm gear(EFEWD), is originally presented to minimize or overcome the gear backlash. Different factors, including the three different types, contact curves, tooth profile, lubrication angle and the induced normal curvature are taken into account to investigate the meshing characteristics and create the profile of a novel specific type of worm drive through mathematical models and theoretical analysis. The tooth of the worm wheel is very specific with the sine-shaped tooth which is located at the alveolus of the worm and the tooth profile of a worm is generated by the meshing movement of the worm wheel with the sine-shaped tooth, but just the end face of the worm(with three different typical meshing types) is adapted to meshing, and therefore an extraordinary manufacturing methods is used to generate the profile of the end face engagement worm. The research results indicates that the bearing contacts of the generated conjugate hourglass worm gear set are in line contacts, with certain advantages of no-backlash, high precision and high operating efficiency over other gears and gear systems besides the end face engagement worm gear drive may improve bearing contact, reduce the level of transmission errors and lessen the sensitivity to errors of alignment. Also, the end face engagement worm can be easily made with superior meshing and lubrication performance compared with the conventional techniques. In particular, the meshing and lubrication performance of the end face engagement worm gear by using the end face to meshing can be increased over 10% and 7%, respectively. This investigate is expect to provide a new insight on the design of the future no-backlash worm drive for industry.     

平面二次包络环面蜗杆传动多目标优化设计

平面二次包络环面蜗杆传动优化设计，通常以蜗轮齿固体积最小或以传动副性能最优为目标函数。为了兼顾该型传动副的性能和制造成本，以前述两种目标函数作为多目标优化设计的目标函数分量，建立了平面二次包络环面蜗杆传动多目标优化设计的数学模型，并用Matlab优化工具箱对模型进行了求解。     

用齿轮滚刀加工蜗轮的设计计算

针对单件小批量蜗杆伟动或修配旧蜗杆传动时,设计、制造专用的蜗轮滚刀既不经济而又地的缺陷,提出用齿轮滚刀加工蜗轮,并就加工中的设计计算加以讨论,推导出设计公式并进行了实例计算。     

浅释蜗轮蜗杆传动中齿形的影响与改善

指出在蜗轮蜗杆减速装置中,齿形是否准确,是影响蜗轮蜗杆传动质量的主要原因之一。文章先对蜗杆的齿形进行了分析,又指出如何提高蜗轮蜗杆齿形的准确性问题,其他是有效提高蜗轮蜗杆的传动效率、降低传动噪声和温升的重要手段。并针对ZA型蜗轮蜗杆齿形的加工工艺及齿形的成形加以分析和探讨,总结出了ZA型蜗轮蜗杆齿形传动中的问题,提出了改善的方案,即在ZA型蜗轮蜗杆传动中,采用磨削蜗杆的齿形,克服由于齿形不准所造成的不良影响,来改善传动质量,提高产品品质。     

阀门电动装置蜗轮蜗杆精确建模研究

蜗轮蜗杆是阀门电动装置的关键传动部件,进行精确的实体建模是进行有限元接触分析的前提,而蜗轮的齿面是复杂的空间曲面,是建模的难点。通过蜗轮蜗杆的啮合关系得出蜗轮齿面啮合方程,运用Matlab编程求解蜗轮齿面方程得到齿面上的离散点,再通过Pro／E逆向反求得到蜗轮齿面,最终实现蜗轮的精确建模。另外通过Pro／E建立蜗杆模型并对蜗轮蜗杆进行装配,经检验装配后无干涉存在,结果表明该方法能够准确地建立蜗轮蜗杆实体模型。     

塑料斜齿轮与钢制蜗杆传动的非线性边界分析

基于SolidEdge对蜗轮蜗杆副进行参数化建模,将模型导入MSC.Patran/Mastran软件,分析了塑料蜗轮与钢制蜗杆副在最大转矩为30 N·m的作用下,从10%～100%载荷的应力应变变化趋势.模拟并绘制了啮合副在啮合周期内几个离散点的应力应变峰值分布图,用数学插值方法计算任意位置的应力应变值.进而对塑料蜗轮与钢制蜗杆传动力学性能进行了分析.     

弧面蜗杆加工数控专用机床设计

首先分析弧面蜗杆齿面的加工原理,然后指出加工弧面蜗杆蜗轮副的专用机床必须具备的基本运动,为了满足这些基本运动,设计专用机床时应配置执行及其传动系统,最后介绍设计数控专用机床时应具有的基本结构。     

滚锥齿超环面行星蜗杆传动的优化设计

针对滚锥齿超环面行星蜗杆传动，以体积最小为优化目标函数，建立了优化数学模型，采用罚函数法进行了优化计算并同原设计参数进行比较，得到了满意结论。     

工作台齿圈齿轮啮合侧隙检测和调试技术的研究和应用

介绍了一种检测和调试重型回转工作台内嵌式齿圈齿轮啮合侧隙的方法,解决了装配过程中无法检测齿圈齿轮啮合侧隙的问题,提高了重型回转工作台的回转精度。